diff options
| -rw-r--r-- | archival/dpkg.c | 1927 | ||||
| -rw-r--r-- | dpkg.c | 1927 |
2 files changed, 2496 insertions, 1358 deletions
diff --git a/archival/dpkg.c b/archival/dpkg.c index 020a68a..ffe7467 100644 --- a/archival/dpkg.c +++ b/archival/dpkg.c @@ -1,854 +1,1423 @@ -#include <ctype.h> -#include <dirent.h> +/* + * Mini dpkg implementation for busybox. + * This is not meant as a replacemnt for dpkg + * + * Copyright (C) 2001 by Glenn McGrath + * + * Started life as a busybox implementation of udpkg + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Library General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +/* + * Known difference between busybox dpkg and the official dpkg that i dont + * consider important, its worth keeping a note of differences anyway, just to + * make it easier to maintain. + * - The first value for the Confflile: field isnt placed on a new line. + * - The <package>.control file is extracted and kept in the info dir. + * - When installing a package the Status: field is placed at the end of the + * section, rather than just after the Package: field. + * - Packages with previously unknown status are inserted at the begining of + * the status file + * + * Bugs that need to be fixed + * - (unknown, please let me know when you find any) + * + */ + #include <getopt.h> -#include <stdio.h> -#include <string.h> #include <stdlib.h> -#include <search.h> -#include <errno.h> -#include <fcntl.h> +#include <string.h> #include <unistd.h> -#include <utime.h> -#include <sys/types.h> -#include <sys/stat.h> - #include "busybox.h" -#define DEPENDSMAX 64 /* maximum number of depends we can handle */ - -/* Should we do full dependency checking? */ -//#define DODEPENDS 0 - -/* Should we do debugging? */ -//#define DODEBUG 0 - -#ifdef DODEBUG -#define SYSTEM(x) do_system(x) -#define DPRINTF(fmt,args...) fprintf(stderr, fmt, ##args) -#else -#define SYSTEM(x) system(x) -#define DPRINTF(fmt,args...) /* nothing */ -#endif - -/* from dpkg-deb.c */ - -static const char statusfile[] = "/var/lib/dpkg/status.udeb"; -static const char new_statusfile[] = "/var/lib/dpkg/status.udeb.new"; -static const char bak_statusfile[] = "/var/lib/dpkg/status.udeb.bak"; - -static const char infodir[] = "/var/lib/dpkg/info/"; -static const char udpkg_quiet[] = "UDPKG_QUIET"; - -//static const int status_want_unknown = 1; -static const int state_want_install = 2; -//static const int state_want_hold = 3; -//static const int state_want_deinstall = 4; -//static const int state_want_purge = 5; - -static const int state_flag_ok = 1; -//static const int state_flag_reinstreq = 2; -//static const int state_flag_hold = 3; -//static const int state_flag_holdreinstreq = 4; - -//static const int state_statusnoninstalled = 1; -static const int state_status_unpacked = 2; -static const int state_status_halfconfigured = 3; -static const int state_status_installed = 4; -static const int state_status_halfinstalled = 5; -//static const int state_statusconfigfiles = 6; -//static const int state_statuspostinstfailed = 7; -//static const int state_statusremovalfailed = 8; - -static const char *state_words_want[] = { "unknown", "install", "hold", "deinstall", "purge", 0 }; -static const char *state_words_flag[] = { "ok", "reinstreq", "hold", "hold-reinstreq", 0 }; -static const char *state_words_status[] = { "not-installed", "unpacked", "half-configured", "installed", - "half-installed", "config-files", "post-inst-failed", "removal-failed", 0 }; - -static const int color_white = 0; -static const int color_grey = 1; -static const int color_black = 2; - -/* data structures */ -typedef struct package_s { - char *filename; - char *package; - unsigned char state_want; - unsigned char state_flag; - unsigned char state_status; - char *depends; - char *provides; - char *description; - char *priority; - char *section; - char *installed_size; - char *maintainer; - char *source; - char *version; - char *pre_depends; - char *replaces; - char *recommends; - char *suggests; - char *conflicts; - char *conffiles; - char *long_description; - char *architecture; - char *md5sum; - int installer_menu_item; - char color; /* for topo-sort */ - struct package_s *requiredfor[DEPENDSMAX]; - unsigned short requiredcount; - struct package_s *next; -} package_t; - -#ifdef DODEBUG -static int do_system(const char *cmd) -{ - DPRINTF("cmd is %s\n", cmd); - return system(cmd); -} -#else -#define do_system(cmd) system(cmd) -#endif +/* NOTE: If you vary HASH_PRIME sizes be aware, + * 1) Tweaking these will have a big effect on how much memory this program uses. + * 2) For computational efficiency these hash tables should be at least 20% + * larger than the maximum number of elements stored in it. + * 3) All _HASH_PRIME's must be a prime number or chaos is assured, if your looking + * for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt + * 4) If you go bigger than 15 bits you may get into trouble (untested) as its + * sometimes cast to an unsigned int, if you go to 16 bit you will overlap + * int's and chaos is assured, 16381 is the max prime for 14 bit field + */ -static int package_compare(const void *p1, const void *p2) -{ - return strcmp(((package_t *)p1)->package, - ((package_t *)p2)->package); -} +/* NAME_HASH_PRIME, Stores package names and versions, + * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME, + * as there a lot of duplicate version numbers */ +#define NAME_HASH_PRIME 16381 +char *name_hashtable[NAME_HASH_PRIME + 1]; + +/* PACKAGE_HASH_PRIME, Maximum number of unique packages, + * It must not be smaller than STATUS_HASH_PRIME, + * Currently only packages from status_hashtable are stored in here, but in + * future this may be used to store packages not only from a status file, + * but an available_hashtable, and even multiple packages files. + * Package can be stored more than once if they have different versions. + * e.g. The same package may have different versions in the status file + * and available file */ +#define PACKAGE_HASH_PRIME 10007 +typedef struct edge_s { + unsigned int operator:3; + unsigned int type:4; + unsigned int name:14; + unsigned int version:14; +} edge_t; + +typedef struct common_node_s { + unsigned int name:14; + unsigned int version:14; + unsigned int num_of_edges:14; + edge_t **edge; +} common_node_t; +common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1]; + +/* Currently it doesnt store packages that have state-status of not-installed + * So it only really has to be the size of the maximum number of packages + * likely to be installed at any one time, so there is a bit of leaway here */ +#define STATUS_HASH_PRIME 8191 +typedef struct status_node_s { + unsigned int package:14; /* has to fit PACKAGE_HASH_PRIME */ + unsigned int status:14; /* has to fit STATUS_HASH_PRIME */ +} status_node_t; +status_node_t *status_hashtable[STATUS_HASH_PRIME + 1]; + +/* Even numbers are for 'extras', like ored dependecies or null */ +enum edge_type_e { + EDGE_NULL = 0, + EDGE_PRE_DEPENDS = 1, + EDGE_OR_PRE_DEPENDS = 2, + EDGE_DEPENDS = 3, + EDGE_OR_DEPENDS = 4, + EDGE_REPLACES = 5, + EDGE_PROVIDES = 7, + EDGE_CONFLICTS = 9, + EDGE_SUGGESTS = 11, + EDGE_RECOMMENDS = 13, + EDGE_ENHANCES = 15 +}; +enum operator_e { + VER_NULL = 0, + VER_EQUAL = 1, + VER_LESS = 2, + VER_LESS_EQUAL = 3, + VER_MORE = 4, + VER_MORE_EQUAL = 5, + VER_ANY = 6 +}; + +enum dpkg_opt_e { + dpkg_opt_purge = 1, + dpkg_opt_remove = 2, + dpkg_opt_unpack = 4, + dpkg_opt_configure = 8, + dpkg_opt_install = 16, + dpkg_opt_package_name = 32, + dpkg_opt_filename = 64, + dpkg_opt_list_installed = 128, + dpkg_opt_force_ignore_depends = 256 +}; + +typedef struct deb_file_s { + char *control_file; + char *filename; + unsigned int package:14; +} deb_file_t; -#ifdef DODEPENDS -static char **depends_split(const char *dependsstr) +void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime) { - static char *dependsvec[DEPENDSMAX]; - char *p; - int i = 0; + unsigned long int hash_num = key[0]; + int len = strlen(key); + int i; - dependsvec[0] = 0; - if (dependsstr == 0) { - goto end; + /* Maybe i should have uses a "proper" hashing algorithm here instead + * of making one up myself, seems to be working ok though. */ + for(i = 1; i < len; i++) { + /* shifts the ascii based value and adds it to previous value + * shift amount is mod 24 because long int is 32 bit and data + * to be shifted is 8, dont want to shift data to where it has + * no effect*/ + hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24)); } + *start = (unsigned int) hash_num % hash_prime; + *decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1)); +} - p = xstrdup(dependsstr); - while (*p != 0 && *p != '\n') { - if (*p != ' ') { - if (*p == ',') { - *p = 0; - dependsvec[++i] = 0; - } else { - if (dependsvec[i] == 0) { - dependsvec[i] = p; - } - } +/* this adds the key to the hash table */ +int search_name_hashtable(const char *key) +{ + unsigned int probe_address = 0; + unsigned int probe_decrement = 0; + + make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME); + while(name_hashtable[probe_address] != NULL) { + if (strcmp(name_hashtable[probe_address], key) == 0) { + return(probe_address); } else { - *p = 0; /* eat the space... */ + probe_address -= probe_decrement; + if ((int)probe_address < 0) { + probe_address += NAME_HASH_PRIME; + } } - p++; } - *p = 0; + name_hashtable[probe_address] = xstrdup(key); -end: - dependsvec[i+1] = 0; - return dependsvec; + return(probe_address); } -/* Topological sort algorithm: - * ordered is the output list, pkgs is the dependency graph, pkg is - * the current node - * - * recursively add all the adjacent nodes to the ordered list, marking - * each one as visited along the way - * - * yes, this algorithm looks a bit odd when all the params have the - * same type :-) +/* this DOESNT add the key to the hashtable + * TODO make it consistent with search_name_hashtable */ -static void depends_sort_visit(package_t **ordered, package_t *pkgs, - package_t *pkg) +unsigned int search_status_hashtable(const char *key) { - unsigned short i; - - /* mark node as processing */ - pkg->color = color_grey; - - /* visit each not-yet-visited node */ - for (i = 0; i < pkg->requiredcount; i++) - if (pkg->requiredfor[i]->color == color_white) - depends_sort_visit(ordered, pkgs, pkg->requiredfor[i]); - -#if 0 - /* add it to the list */ - newnode = (struct package_t *)xmalloc(sizeof(struct package_t)); - /* make a shallow copy */ - *newnode = *pkg; - newnode->next = *ordered; - *ordered = newnode; -#endif - - pkg->next = *ordered; - *ordered = pkg; - - /* mark node as done */ - pkg->color = color_black; + unsigned int probe_address = 0; + unsigned int probe_decrement = 0; + + make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME); + while(status_hashtable[probe_address] != NULL) { + if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) { + break; + } else { + probe_address -= probe_decrement; + if ((int)probe_address < 0) { + probe_address += STATUS_HASH_PRIME; + } + } + } + return(probe_address); } -static package_t *depends_sort(package_t *pkgs) +/* Need to rethink version comparison, maybe the official dpkg has something i can use ? */ +int version_compare_part(const char *version1, const char *version2) { - /* TODO: it needs to break cycles in the to-be-installed package - * graph... */ - package_t *ordered = NULL; - package_t *pkg; - - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - pkg->color = color_white; + int upstream_len1 = 0; + int upstream_len2 = 0; + char *name1_char; + char *name2_char; + int len1 = 0; + int len2 = 0; + int tmp_int; + int ver_num1; + int ver_num2; + + if (version1 == NULL) { + version1 = xstrdup(""); + } + if (version2 != NULL) { + version2 = xstrdup(""); } - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - if (pkg->color == color_white) { - depends_sort_visit(&ordered, pkgs, pkg); + upstream_len1 = strlen(version1); + upstream_len2 = strlen(version2); + + while ((len1 < upstream_len1) || (len2 < upstream_len2)) { + /* Compare non-digit section */ + tmp_int = strcspn(&version1[len1], "0123456789"); + name1_char = xstrndup(&version1[len1], tmp_int); + len1 += tmp_int; + tmp_int = strcspn(&version2[len2], "0123456789"); + name2_char = xstrndup(&version2[len2], tmp_int); + len2 += tmp_int; + tmp_int = strcmp(name1_char, name2_char); + free(name1_char); + free(name2_char); + if (tmp_int != 0) { + return(tmp_int); + } + + /* Compare digits */ + tmp_int = strspn(&version1[len1], "0123456789"); + name1_char = xstrndup(&version1[len1], tmp_int); + len1 += tmp_int; + tmp_int = strspn(&version2[len2], "0123456789"); + name2_char = xstrndup(&version2[len2], tmp_int); + len2 += tmp_int; + ver_num1 = atoi(name1_char); + ver_num2 = atoi(name2_char); + free(name1_char); + free(name2_char); + if (ver_num1 < ver_num2) { + return(-1); } + else if (ver_num1 > ver_num2) { + return(1); + } + } + return(0); +} + +/* if ver1 < ver2 return -1, + * if ver1 = ver2 return 0, + * if ver1 > ver2 return 1, + */ +int version_compare(const unsigned int ver1, const unsigned int ver2) +{ + char *ch_ver1 = name_hashtable[ver1]; + char *ch_ver2 = name_hashtable[ver2]; + + char epoch1, epoch2; + char *deb_ver1, *deb_ver2; + char *ver1_ptr, *ver2_ptr; + char *upstream_ver1; + char *upstream_ver2; + int result; + + /* Compare epoch */ + if (ch_ver1[1] == ':') { + epoch1 = ch_ver1[0]; + ver1_ptr = strchr(ch_ver1, ':') + 1; + } else { + epoch1 = '0'; + ver1_ptr = ch_ver1; + } + if (ch_ver2[1] == ':') { + epoch2 = ch_ver2[0]; + ver2_ptr = strchr(ch_ver2, ':') + 1; + } else { + epoch2 = '0'; + ver2_ptr = ch_ver2; + } + if (epoch1 < epoch2) { + return(-1); } + else if (epoch1 > epoch2) { + return(1); + } + + /* Compare upstream version */ + upstream_ver1 = xstrdup(ver1_ptr); + upstream_ver2 = xstrdup(ver2_ptr); + + /* Chop off debian version, and store for later use */ + deb_ver1 = strrchr(upstream_ver1, '-'); + deb_ver2 = strrchr(upstream_ver2, '-'); + if (deb_ver1) { + deb_ver1[0] = '\0'; + deb_ver1++; + } + if (deb_ver2) { + deb_ver2[0] = '\0'; + deb_ver2++; + } + result = version_compare_part(upstream_ver1, upstream_ver2); + + free(upstream_ver1); + free(upstream_ver2); - /* Leaks the old list... return the new one... */ - return ordered; + if (result != 0) { + return(result); + } + + /* Compare debian versions */ + return(version_compare_part(deb_ver1, deb_ver2)); +} + +int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator) +{ + const int version_result = version_compare(version1, version2); + switch(operator) { + case (VER_ANY): + return(TRUE); + case (VER_EQUAL): + if (version_result == 0) { + return(TRUE); + } + break; + case (VER_LESS): + if (version_result < 0) { + return(TRUE); + } + break; + case (VER_LESS_EQUAL): + if (version_result <= 0) { + return(TRUE); + } + break; + case (VER_MORE): + if (version_result > 0) { + return(TRUE); + } + break; + case (VER_MORE_EQUAL): + if (version_result >= 0) { + return(TRUE); + } + break; + } + return(FALSE); } -/* resolve package dependencies -- - * for each package in the list of packages to be installed, we parse its - * dependency info to determine if the dependent packages are either - * already installed, or are scheduled to be installed. If both tests fail - * than bail. - * - * The algorithm here is O(n^2*m) where n = number of packages to be - * installed and m is the # of dependencies per package. Not a terribly - * efficient algorithm, but given that at any one time you are unlikely - * to install a very large number of packages it doesn't really matter - */ -static package_t *depends_resolve(package_t *pkgs, void *status) +int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator) { - package_t *pkg, *chk; - package_t dependpkg; - char **dependsvec; - int i; - void *found; - - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - dependsvec = depends_split(pkg->depends); - i = 0; - while (dependsvec[i] != 0) { - /* Check for dependencies; first look for installed packages */ - dependpkg.package = dependsvec[i]; - if (((found = tfind(&dependpkg, &status, package_compare)) == 0) || - ((chk = *(package_t **)found) && (chk->state_flag & state_flag_ok) && - (chk->state_status & state_status_installed))) { - - /* if it fails, we look through the list of packages we are going to - * install */ - for (chk = pkgs; chk != 0; chk = chk->next) { - if (strcmp(chk->package, dependsvec[i]) == 0 || (chk->provides && - strncmp(chk->provides, dependsvec[i], strlen(dependsvec[i])) == 0)) { - if (chk->requiredcount >= DEPENDSMAX) { - error_msg("Too many dependencies for %s", chk->package); - return 0; - } - if (chk != pkg) { - chk->requiredfor[chk->requiredcount++] = pkg; - } - break; - } - } - if (chk == 0) { - error_msg("%s depends on %s, but it is not going to be installed", pkg->package, dependsvec[i]); - return 0; - } + unsigned int probe_address = 0; + unsigned int probe_decrement = 0; + + make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME); + while(package_hashtable[probe_address] != NULL) { + if (package_hashtable[probe_address]->name == name) { + if (operator == VER_ANY) { + return(probe_address); + } + if (test_version(package_hashtable[probe_address]->version, version, operator)) { + return(probe_address); } - i++; + } + probe_address -= probe_decrement; + if ((int)probe_address < 0) { + probe_address += PACKAGE_HASH_PRIME; } } - - return depends_sort(pkgs); + return(probe_address); } -#endif - -/* Status file handling routines - * - * This is a fairly minimalistic implementation. there are two main functions - * that are supported: - * - * 1) reading the entire status file: - * the status file is read into memory as a binary-tree, with just the - * package and status info preserved - * - * 2) merging the status file - * control info from (new) packages is merged into the status file, - * replacing any pre-existing entries. when a merge happens, status info - * read using the status_read function is written back to the status file + +/* + * Create one new node and one new edge for every dependency. */ -static unsigned char status_parse(const char *line, const char **status_words) +void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type) { - unsigned char status_num; - int i = 0; + char *line = xstrdup(whole_line); + char *line2; + char *line_ptr1 = NULL; + char *line_ptr2 = NULL; + char *field; + char *field2; + char *version; + edge_t *edge; + int offset_ch; + int type; + + field = strtok_r(line, ",", &line_ptr1); + do { + line2 = xstrdup(field); + field2 = strtok_r(line2, "|", &line_ptr2); + if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) { + type = EDGE_OR_DEPENDS; + } + else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) { + type = EDGE_OR_PRE_DEPENDS; + } else { + type = edge_type; + } + + do { + edge = (edge_t *) xmalloc(sizeof(edge_t)); + edge->type = type; + + /* Skip any extra leading spaces */ + field2 += strspn(field2, " "); + + /* Get dependency version info */ + version = strchr(field2, '('); + if (version == NULL) { + edge->operator = VER_ANY; + /* Get the versions hash number, adding it if the number isnt already in there */ + edge->version = search_name_hashtable("ANY"); + } else { + /* Skip leading ' ' or '(' */ + version += strspn(field2, " "); + version += strspn(version, "("); + /* Calculate length of any operator charactors */ + offset_ch = strspn(version, "<=>"); + /* Determine operator */ + if (offset_ch > 0) { + if (strncmp(version, "=", offset_ch) == 0) { + edge->operator = VER_EQUAL; + } + else if (strncmp(version, "<<", offset_ch) == 0) { + edge->operator = VER_LESS; + } + else if (strncmp(version, "<=", offset_ch) == 0) { + edge->operator = VER_LESS_EQUAL; + } + else if (strncmp(version, ">>", offset_ch) == 0) { + edge->operator = VER_MORE; + } + else if (strncmp(version, ">=", offset_ch) == 0) { + edge->operator = VER_MORE_EQUAL; + } else { + error_msg_and_die("Illegal operator\n"); + } + } + /* skip to start of version numbers */ + version += offset_ch; + version += strspn(version, " "); + + /* Truncate version at trailing ' ' or ')' */ + version[strcspn(version, " )")] = '\0'; + /* Get the versions hash number, adding it if the number isnt already in there */ + edge->version = search_name_hashtable(version); + } + + /* Get the dependency name */ + field2[strcspn(field2, " (")] = '\0'; + edge->name = search_name_hashtable(field2); + + /* link the new edge to the current node */ + parent_node->num_of_edges++; + parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1)); + parent_node->edge[parent_node->num_of_edges - 1] = edge; + } while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL); + free(line2); + } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL); + free(line); - while (status_words[i] != 0) { - if (strncmp(line, status_words[i], strlen(status_words[i])) == 0) { - status_num = (char)i; - return(status_num); + return; +} + +void free_package(common_node_t *node) +{ + int i; + if (node != NULL) { + for (i = 0; i < node->num_of_edges; i++) { + if (node->edge[i] != NULL) { + free(node->edge[i]); + } + } + if (node->edge != NULL) { + free(node->edge); + } + if (node != NULL) { + free(node); } - i++; } - /* parse error */ - error_msg("Invalid status word"); - return(0); } -/* - * Read the buffered control file and parse it, - * filling parsed fields into the package structure - */ -static int fill_package_struct(package_t *package, const char *package_buffer) +unsigned int fill_package_struct(char *control_buffer) { - char *field = NULL; + common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t)); + + char *field; + char *field_name; + char *field_value; int field_start = 0; - int field_length = 0; + int field_length; + int seperator_offset; + int num = -1; + int buffer_length = strlen(control_buffer); + + new_node->version = search_name_hashtable("unknown"); + while (field_start < buffer_length) { + field = read_package_field(&control_buffer[field_start]); - while ((field = read_package_field(&package_buffer[field_start])) != NULL) { + /* Setup start point for next field */ field_length = strlen(field); field_start += (field_length + 1); - if (strlen(field) == 0) { - printf("empty line: *this shouldnt happen i dont think*\n"); - break; - } + seperator_offset = strcspn(field, ":"); + field_name = xstrndup(field, seperator_offset); + field_value = field + seperator_offset + 1; + field_value += strspn(field_value, " \n\t"); - /* these are common to both installed and uninstalled packages */ - if (strstr(field, "Package: ") == field) { - package->package = strdup(field + 9); - } - else if (strstr(field, "Depends: ") == field) { - package->depends = strdup(field + 9); - } - else if (strstr(field, "Provides: ") == field) { - package->provides = strdup(field + 10); + if (strcmp(field_name, "Package") == 0) { + new_node->name = search_name_hashtable(field_value); } - /* This is specific to the Debian Installer. Ifdef? */ - else if (strstr(field, "installer-menu-item: ") == field) { - package->installer_menu_item = atoi(field + 21); + else if (strcmp(field_name, "Version") == 0) { + new_node->version = search_name_hashtable(field_value); } - else if (strstr(field, "Description: ") == field) { - package->description = strdup(field + 13); + else if (strcmp(field_name, "Pre-Depends") == 0) { + add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS); } - else if (strstr(field, "Priority: ") == field) { - package->priority = strdup(field + 10); + else if (strcmp(field_name, "Depends") == 0) { + add_split_dependencies(new_node, field_value, EDGE_DEPENDS); } - else if (strstr(field, "Section: ") == field) { - package->section = strdup(field + 9); + else if (strcmp(field_name, "Replaces") == 0) { + add_split_dependencies(new_node, field_value, EDGE_REPLACES); } - else if (strstr(field, "Installed-Size: ") == field) { - package->installed_size = strdup(field + 16); + else if (strcmp(field_name, "Provides") == 0) { + add_split_dependencies(new_node, field_value, EDGE_PROVIDES); } - else if (strstr(field, "Maintainer: ") == field) { - package->maintainer = strdup(field + 12); + else if (strcmp(field_name, "Conflicts") == 0) { + add_split_dependencies(new_node, field_value, EDGE_CONFLICTS); } - else if (strstr(field, "Version: ") == field) { - package->version = strdup(field + 9); - } - else if (strstr(field, "Suggests: ") == field) { - package->suggests = strdup(field + 10); - } - else if (strstr(field, "Recommends: ") == field) { - package->recommends = strdup(field + 12); - } -/* else if (strstr(field, "Conffiles: ") == field) { - package->conffiles = read_block(file); - package->conffiles = xcalloc(1, 1); - while ((field = strtok(NULL, "\n")) != NULL) { - package->long_description = xrealloc(package->conffiles, - strlen(package->conffiles) + strlen(field) + 1); - strcat(package->conffiles, field); - } - } -*/ - /* These are only in available file */ - else if (strstr(field, "Architecture: ") == field) { - package->architecture = strdup(field + 14); + else if (strcmp(field_name, "Suggests") == 0) { + add_split_dependencies(new_node, field_value, EDGE_SUGGESTS); } - else if (strstr(field, "Filename: ") == field) { - package->filename = strdup(field + 10); + else if (strcmp(field_name, "Recommends") == 0) { + add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS); } - else if (strstr(field, "MD5sum ") == field) { - package->md5sum = strdup(field + 7); + else if (strcmp(field_name, "Enhances") == 0) { + add_split_dependencies(new_node, field_value, EDGE_ENHANCES); } - - /* This is only needed for status file */ - if (strstr(field, "Status: ") == field) { - char *word_pointer; - - word_pointer = strchr(field, ' ') + 1; - package->state_want = status_parse(word_pointer, state_words_want); - word_pointer = strchr(word_pointer, ' ') + 1; - package->state_flag = status_parse(word_pointer, state_words_flag); - word_pointer = strchr(word_pointer, ' ') + 1; - package->state_status = status_parse(word_pointer, state_words_status); - } else { - package->state_want = status_parse("purge", state_words_want); - package->state_flag = status_parse("ok", state_words_flag); - package->state_status = status_parse("not-installed", state_words_status); - } - + free(field_name); free(field); } - return EXIT_SUCCESS; + if (new_node->version == search_name_hashtable("unknown")) { + free_package(new_node); + return(-1); + } + num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL); + if (package_hashtable[num] == NULL) { + package_hashtable[num] = new_node; + } else { + free_package(new_node); + } + return(num); } -extern void write_package(FILE *out_file, package_t *pkg) +/* if num = 1, it returns the want status, 2 returns flag, 3 returns status */ +unsigned int get_status(const unsigned int status_node, const int num) { - if (pkg->package) { - fprintf(out_file, "Package: %s\n", pkg->package); - } - if ((pkg->state_want != 0) || (pkg->state_flag != 0)|| (pkg->state_status != 0)) { - fprintf(out_file, "Status: %s %s %s\n", - state_words_want[pkg->state_want - 1], - state_words_flag[pkg->state_flag - 1], - state_words_status[pkg->state_status - 1]); - } - if (pkg->depends) { - fprintf(out_file, "Depends: %s\n", pkg->depends); - } - if (pkg->provides) { - fprintf(out_file, "Provides: %s\n", pkg->provides); - } - if (pkg->priority) { - fprintf(out_file, "Priority: %s\n", pkg->priority); - } - if (pkg->section) { - fprintf(out_file, "Section: %s\n", pkg->section); - } - if (pkg->section) { - fprintf(out_file, "Installed-Size: %s\n", pkg->installed_size); - } - if (pkg->maintainer) { - fprintf(out_file, "Maintainer: %s\n", pkg->maintainer); - } - if (pkg->source) { - fprintf(out_file, "Source: %s\n", pkg->source); - } - if (pkg->version) { - fprintf(out_file, "Version: %s\n", pkg->version); - } - if (pkg->pre_depends) { - fprintf(out_file, "Pre-depends: %s\n", pkg->pre_depends); - } - if (pkg->replaces) { - fprintf(out_file, "Replaces: %s\n", pkg->replaces); - } - if (pkg->recommends) { - fprintf(out_file, "Recommends: %s\n", pkg->recommends); - } - if (pkg->suggests) { - fprintf(out_file, "Suggests: %s\n", pkg->suggests); - } - if (pkg->conflicts) { - fprintf(out_file, "Conflicts: %s\n", pkg->conflicts); - } - if (pkg->conffiles) { - fprintf(out_file, "Conf-files: %s\n", pkg->conffiles); - } - if (pkg->architecture) { - fprintf(out_file, "Architecture: %s\n", pkg->architecture); - } - if (pkg->filename) { - fprintf(out_file, "Filename: %s\n", pkg->filename); - } - if (pkg->md5sum) { - fprintf(out_file, "MD5sum: %s\n", pkg->md5sum); + char *status_string = name_hashtable[status_hashtable[status_node]->status]; + char *state_sub_string; + unsigned int state_sub_num; + int len; + int i; + + /* set tmp_string to point to the start of the word number */ + for (i = 1; i < num; i++) { + /* skip past a word */ + status_string += strcspn(status_string, " "); + /* skip past the seperating spaces */ + status_string += strspn(status_string, " "); } - if (pkg->installer_menu_item) { - fprintf(out_file, "installer-main-menu %d\n", pkg->installer_menu_item); + len = strcspn(status_string, " \n\0"); + state_sub_string = xstrndup(status_string, len); + state_sub_num = search_name_hashtable(state_sub_string); + free(state_sub_string); + return(state_sub_num); +} + +void set_status(const unsigned int status_node_num, const char *new_value, const int position) +{ + const unsigned int new_value_len = strlen(new_value); + const unsigned int new_value_num = search_name_hashtable(new_value); + unsigned int want = get_status(status_node_num, 1); + unsigned int flag = get_status(status_node_num, 2); + unsigned int status = get_status(status_node_num, 3); + int want_len = strlen(name_hashtable[want]); + int flag_len = strlen(name_hashtable[flag]); + int status_len = strlen(name_hashtable[status]); + char *new_status; + + switch (position) { + case (1): + want = new_value_num; + want_len = new_value_len; + break; + case (2): + flag = new_value_num; + flag_len = new_value_len; + break; + case (3): + status = new_value_num; + status_len = new_value_len; + break; + default: + error_msg_and_die("DEBUG ONLY: this shouldnt happen"); } - if (pkg->description) { - fprintf(out_file, "Description: %s\n", pkg->description); + + new_status = (char *) xmalloc(want_len + flag_len + status_len + 3); + sprintf(new_status, "%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]); + status_hashtable[status_node_num]->status = search_name_hashtable(new_status); + return; +} + +void index_status_file(const char *filename) +{ + FILE *status_file; + char *control_buffer; + char *status_line; + status_node_t *status_node = NULL; + unsigned int status_num; + + status_file = fopen(filename, "r"); + while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) { + const unsigned int package_num = fill_package_struct(control_buffer); + if (package_num != -1) { + status_node = xmalloc(sizeof(status_node_t)); + /* fill_package_struct doesnt handle the status field */ + status_line = strstr(control_buffer, "Status:"); + if (status_line != NULL) { + status_line += 7; + status_line += strspn(status_line, " \n\t"); + status_line = xstrndup(status_line, strcspn(status_line, "\n\0")); + status_node->status = search_name_hashtable(status_line); + free(status_line); + } + status_node->package = package_num; + status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]); + status_hashtable[status_num] = status_node; + } + free(control_buffer); } - fputc('\n', out_file); - pkg = pkg->next; + fclose(status_file); + return; } -static void *status_read(void) + +char *get_depends_field(common_node_t *package, const int depends_type) { - FILE *f; - void *status = 0; - package_t *m = 0, *p = 0, *t = 0; - char *package_control_buffer = NULL; + char *depends = NULL; + char *old_sep = (char *)xcalloc(1, 3); + char *new_sep = (char *)xcalloc(1, 3); + int line_size = 0; + int depends_size; - if (getenv(udpkg_quiet) == NULL) { - printf("(Reading database...)\n"); - } + int i; - if ((f = wfopen(statusfile, "r")) == NULL) { - return(NULL); - } + for (i = 0; i < package->num_of_edges; i++) { + if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) || + (package->edge[i]->type == EDGE_OR_DEPENDS)) { + } - while ( (package_control_buffer = fgets_str(f, "\n\n")) != NULL) { - m = (package_t *)xcalloc(1, sizeof(package_t)); - fill_package_struct(m, package_control_buffer); - if (m->package) { - /* - * If there is an item in the tree by this name, - * it must be a virtual package; insert real - * package in preference. - */ - tdelete(m, &status, package_compare); - tsearch(m, &status, package_compare); - if (m->provides) { - /* - * A "Provides" triggers the insertion - * of a pseudo package into the status - * binary-tree. - */ - p = (package_t *)xcalloc(1, sizeof(package_t)); - p->package = xstrdup(m->provides); - t = *(package_t **)tsearch(p, &status, package_compare); - if (t != p) { - free(p->package); - free(p); + if ((package->edge[i]->type == depends_type) || + (package->edge[i]->type == depends_type + 1)) { + /* Check if its the first time through */ + + depends_size = 8 + strlen(name_hashtable[package->edge[i]->name]) + + strlen(name_hashtable[package->edge[i]->version]); + line_size += depends_size; + depends = (char *) xrealloc(depends, line_size + 1); + + /* Check to see if this dependency is the type we are looking for + * +1 to check for 'extra' types, e.g. ored dependecies */ + strcpy(old_sep, new_sep); + if (package->edge[i]->type == depends_type) { + strcpy(new_sep, ", "); + } + else if (package->edge[i]->type == depends_type + 1) { + strcpy(new_sep, "| "); + } + + if (depends_size == line_size) { + strcpy(depends, ""); + } else { + if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) { + strcat(depends, " | "); } else { - /* - * Pseudo package status is the - * same as the status of the - * package providing it - * FIXME: (not quite right, if 2 - * packages of different statuses - * provide it). - */ - t->state_want = m->state_want; - t->state_flag = m->state_flag; - t->state_status = m->state_status; + strcat(depends, ", "); } } - } - else { - free(m); + + strcat(depends, name_hashtable[package->edge[i]->name]); + if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) { + if (package->edge[i]->operator == VER_EQUAL) { + strcat(depends, " (= "); + } + else if (package->edge[i]->operator == VER_LESS) { + strcat(depends, " (<< "); + } + else if (package->edge[i]->operator == VER_LESS_EQUAL) { + strcat(depends, " (<= "); + } + else if (package->edge[i]->operator == VER_MORE) { + strcat(depends, " (>> "); + } + else if (package->edge[i]->operator == VER_MORE_EQUAL) { + strcat(depends, " (>= "); + } else { + strcat(depends, " ("); + } + strcat(depends, name_hashtable[package->edge[i]->version]); + strcat(depends, ")"); + } } } - fclose(f); - return status; + return(depends); } -static int status_merge(void *status, package_t *pkgs) +/* This could do with a cleanup */ +void write_status_file(deb_file_t **deb_file) { - FILE *fin, *fout; - char *line = NULL; - package_t *pkg = 0, *statpkg = 0; - package_t locpkg; + FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r"); + FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w"); + char *package_name; + char *status_from_file; + char *control_buffer = NULL; + char *tmp_string; + char *field; + int status_num; + int field_length; + int field_start = 0; + int buffer_length; + int write_flag; + int i = 0; - if ((fout = wfopen(new_statusfile, "w")) == NULL) { - return 0; - } - if (getenv(udpkg_quiet) == NULL) { - printf("(Updating database...)\n"); - } + /* Update previously known packages */ + while ((control_buffer = fgets_str(old_status_file, "\n\n")) != NULL) { + tmp_string = strstr(control_buffer, "Package:") + 8; + tmp_string += strspn(tmp_string, " \n\t"); + package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0")); + write_flag = FALSE; + + tmp_string = strstr(control_buffer, "Status:"); + if (tmp_string != NULL) { + /* Seperate the status value from the control buffer */ + tmp_string += 7; + tmp_string += strspn(tmp_string, " \n\t"); + status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n")); + } else { + status_from_file = NULL; + } - /* - * Dont use wfopen here, handle errors ourself - */ - if ((fin = fopen(statusfile, "r")) != NULL) { - while (((line = get_line_from_file(fin)) != NULL) && !feof(fin)) { - chomp(line); /* trim newline */ - /* If we see a package header, find out if it's a package - * that we have processed. if so, we skip that block for - * now (write it at the end). - * - * we also look at packages in the status cache and update - * their status fields - */ - if (strstr(line, "Package: ") == line) { - for (pkg = pkgs; pkg != 0 && strcmp(line + 9, - pkg->package) != 0; pkg = pkg->next) ; - - locpkg.package = line + 9; - statpkg = tfind(&locpkg, &status, package_compare); - - /* note: statpkg should be non-zero, unless the status - * file was changed while we are processing (no locking - * is currently done... - */ - if (statpkg != 0) { - statpkg = *(package_t **)statpkg; + /* Find this package in the status hashtable */ + status_num = search_status_hashtable(package_name); + if (status_hashtable[status_num] != NULL) { + const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status]; + if (strcmp(status_from_file, status_from_hashtable) != 0) { + /* New status isnt exactly the same as old status */ + const int state_status = get_status(status_num, 3); + if ((strcmp("installed", name_hashtable[state_status]) == 0) || + (strcmp("unpacked", name_hashtable[state_status]) == 0)) { + /* We need to add the control file from the package */ + i = 0; + while(deb_file[i] != NULL) { + if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) { + char *last_char; + /* Write a status file entry with a modified status */ + /* remove trailing \n's */ + while(1) { + last_char = last_char_is(deb_file[i]->control_file, '\n'); + if (last_char) { + *last_char = '\0'; + } else { + break; + } + } + fputs(deb_file[i]->control_file, new_status_file); + set_status(status_num, "ok", 2); + fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]); + write_flag = TRUE; + break; + } + i++; + } + /* This is temperary, debugging only */ + if (deb_file[i] == NULL) { + error_msg_and_die("ALERT: Couldnt find a control file, your status file may be broken, status may be incorrect for %s", package_name); + } + } + else if (strcmp("not-installed", name_hashtable[state_status]) == 0) { + /* Only write the Package, Status, Priority and Section lines */ + fprintf(new_status_file, "Package: %s\n", package_name); + fprintf(new_status_file, "Status: %s\n", status_from_hashtable); + buffer_length = strlen(control_buffer); + while (field_start < buffer_length) { + field = read_package_field(&control_buffer[field_start]); + field_length = strlen(field); + field_start += (field_length + 1); + if (strncmp(field, "Priority:", 9) == 0) { + fprintf(new_status_file, "Priority:%s\n", field + 9); + } + if (strncmp(field, "Section:", 8) == 0) { + fprintf(new_status_file, "Section:%s\n", field + 8); + } + } + write_flag = TRUE; + fputs("\n", new_status_file); + } + else if (strcmp("config-files", name_hashtable[state_status]) == 0) { + /* only change the status line */ + buffer_length = strlen(control_buffer); + while (field_start < buffer_length) { + field = read_package_field(&control_buffer[field_start]); + /* Setup start point for next field */ + field_length = strlen(field); + field_start += (field_length + 1); + if (strncmp(field, "Status:", 7) == 0) { + fprintf(new_status_file, "Status: %s\n", status_from_hashtable); + } else { + fprintf(new_status_file, "%s\n", field); + } + free(field); + } + write_flag = TRUE; + fputs("\n", new_status_file); } } - if (pkg != 0) { - continue; - } - if (strstr(line, "Status: ") == line && statpkg != 0) { - snprintf(line, sizeof(line), "Status: %s %s %s", - state_words_want[statpkg->state_want - 1], - state_words_flag[statpkg->state_flag - 1], - state_words_status[statpkg->state_status - 1]); + } + + /* If the package from the status file wasnt handle above, do it now*/ + if (write_flag == FALSE) { + fprintf(new_status_file, "%s\n\n", control_buffer); + } + + if (status_from_file != NULL) { + free(status_from_file); + } + free(package_name); + free(control_buffer); + } + /* Write any new packages */ + for(i = 0; deb_file[i] != NULL; i++) { + status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]); + if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) { + char *last_char; + /* remove trailing \n's */ + while(1) { + last_char = last_char_is(deb_file[i]->control_file, '\n'); + if (last_char) { + *last_char = '\0'; + } else { + break; + } } - fprintf(fout, "%s\n", line); + + fputs(deb_file[i]->control_file, new_status_file); + set_status(status_num, "ok", 2); + fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]); } - fclose(fin); } - free(line); + fclose(old_status_file); + fclose(new_status_file); - // Print out packages we processed. - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - write_package(fout, pkg); - } - fclose(fout); - /* - * Its ok if renaming statusfile fails becasue it doesnt exist - */ - if (rename(statusfile, bak_statusfile) == -1) { + /* Create a seperate backfile to dpkg */ + if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) { struct stat stat_buf; - if (stat(statusfile, &stat_buf) == 0) { - error_msg("Couldnt create backup status file"); - return(EXIT_FAILURE); + if (stat("/var/lib/dpkg/status", &stat_buf) == 0) { + error_msg_and_die("Couldnt create backup status file"); } + /* Its ok if renaming the status file fails becasue status + * file doesnt exist, maybe we are starting from scratch */ error_msg("No status file found, creating new one"); } - if (rename(new_statusfile, statusfile) == -1) { - error_msg("Couldnt create status file"); - return(EXIT_FAILURE); + if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) { + error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file"); } - return(EXIT_SUCCESS); } -static int is_file(const char *fn) +int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count) { - struct stat statbuf; + int *conflicts = NULL; + int conflicts_num = 0; + int state_status; + int state_flag; + int state_want; + unsigned int status_package_num; + int i = deb_start; + int j, k; + + /* Check for conflicts + * TODO: TEST if conflicts with other packages to be installed + * + * Add install packages and the packages they provide + * to the list of files to check conflicts for + */ - if (stat(fn, &statbuf) < 0) { - return 0; + /* Create array of package numbers to check against + * installed package for conflicts*/ + while (deb_file[i] != NULL) { + const unsigned int package_num = deb_file[i]->package; + conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1)); + conflicts[conflicts_num] = package_num; + conflicts_num++; + /* add provides to conflicts list */ + for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) { + if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) { + const int conflicts_package_num = search_package_hashtable( + package_hashtable[package_num]->edge[j]->name, + package_hashtable[package_num]->edge[j]->version, + package_hashtable[package_num]->edge[j]->operator); + if (package_hashtable[conflicts_package_num] == NULL) { + /* create a new package */ + common_node_t *new_node = (common_node_t *) xmalloc(sizeof(common_node_t)); + new_node->name = package_hashtable[package_num]->edge[j]->name; + new_node->version = package_hashtable[package_num]->edge[j]->version; + new_node->num_of_edges = 0; + new_node->edge = NULL; + package_hashtable[conflicts_package_num] = new_node; + } + conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1)); + conflicts[conflicts_num] = conflicts_package_num; + conflicts_num++; + } + } + i++; } - return S_ISREG(statbuf.st_mode); + + /* Check conflicts */ + for (i = 0; i < conflicts_num; i++) { + /* Check for conflicts */ + for (j = 0; j < STATUS_HASH_PRIME; j++) { + if (status_hashtable[j] == NULL) { + continue; + } + state_flag = get_status(j, 2); + state_status = get_status(j, 3); + if ((state_status != search_name_hashtable("installed")) + && (state_flag != search_name_hashtable("want-install"))) { + continue; + } + status_package_num = status_hashtable[j]->package; + for (k = 0; k < package_hashtable[status_package_num]->num_of_edges; k++) { + const edge_t *package_edge = package_hashtable[status_package_num]->edge[k]; + if (package_edge->type != EDGE_CONFLICTS) { + continue; + } + if (package_edge->name != package_hashtable[conflicts[i]]->name) { + continue; + } + /* There is a conflict against the package name + * check if version conflict as well */ + if (test_version(package_hashtable[deb_file[i]->package]->version, + package_edge->version, package_edge->operator)) { + error_msg_and_die("Package %s conflict with %s", + name_hashtable[package_hashtable[deb_file[i]->package]->name], + name_hashtable[package_hashtable[status_package_num]->name]); + } + } + } + } + + /* Check dependendcies */ + i = 0; + while (deb_file[i] != NULL) { + const common_node_t *package_node = package_hashtable[deb_file[i]->package]; + int status_num = 0; + + for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) { + const edge_t *package_edge = package_node->edge[j]; + const unsigned int package_num = search_package_hashtable(package_edge->name, + package_edge->version, package_edge->operator); + + status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]); + state_status = get_status(status_num, 3); + state_want = get_status(status_num, 1); + switch (package_edge->type) { + case(EDGE_PRE_DEPENDS): + case(EDGE_OR_PRE_DEPENDS): + /* It must be already installed */ + /* NOTE: This is untested, nothing apropriate in my status file */ + if ((package_hashtable[package_num] == NULL) || (state_status != search_name_hashtable("installed"))) { + error_msg_and_die("Package %s pre-depends on %s, but it is not installed", + name_hashtable[package_node->name], + name_hashtable[package_edge->name]); + } + break; + case(EDGE_DEPENDS): + case(EDGE_OR_DEPENDS): + /* It must be already installed, or to be installed */ + if ((package_hashtable[package_num] == NULL) || + ((state_status != search_name_hashtable("installed")) && + (state_want != search_name_hashtable("want_install")))) { + error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed", + name_hashtable[package_node->name], + name_hashtable[package_edge->name]); + } + break; + } + } + i++; + } + return(TRUE); } -static int dpkg_doconfigure(package_t *pkg) +char **create_list(const char *filename) { - int r; - char postinst[1024]; - char buf[1024]; - - DPRINTF("Configuring %s\n", pkg->package); - pkg->state_status = 0; - snprintf(postinst, sizeof(postinst), "%s%s.postinst", infodir, pkg->package); + FILE *list_stream; + char **file_list = xmalloc(sizeof(char *)); + char *line = NULL; + char *last_char; + int length = 0; + int count = 0; - if (is_file(postinst)) { - snprintf(buf, sizeof(buf), "%s configure", postinst); - if ((r = do_system(buf)) != 0) { - error_msg("postinst exited with status %d\n", r); - pkg->state_status = state_status_halfconfigured; - return 1; + list_stream = fopen(filename, "r"); + if (list_stream == NULL) { + return(NULL); + } + while (getline(&line, &length, list_stream) != -1) { + file_list = xrealloc(file_list, sizeof(char *) * (length + 1)); + last_char = last_char_is(line, '\n'); + if (last_char) { + *last_char = '\0'; } + file_list[count] = xstrdup(line); + free(line); + count++; + length = 0; + } + fclose(list_stream); + if (count == 0) { + return(NULL); + } else { + file_list[count] = NULL; + return(file_list); } - pkg->state_status = state_status_installed; - - return 0; } -static int dpkg_dounpack(package_t *pkg) +/* maybe i should try and hook this into remove_file.c somehow */ +int remove_file_array(char **remove_names, char **exclude_names) { - FILE *out_stream; - char *info_prefix; - int status = TRUE; - int r = 0; - - DPRINTF("Unpacking %s\n", pkg->package); + struct stat path_stat; + int match_flag; + int remove_flag = FALSE; + int i,j; - /* extract the data file */ - deb_extract(pkg->filename, stdout, (extract_data_tar_gz | extract_all_to_fs), "/", NULL); + if (remove_names == NULL) { + return(FALSE); + } + for (i = 0; remove_names[i] != NULL; i++) { + match_flag = FALSE; + if (exclude_names != NULL) { + for (j = 0; exclude_names[j] != 0; j++) { + if (strcmp(remove_names[i], exclude_names[j]) == 0) { + match_flag = TRUE; + break; + } + } + } + if (!match_flag) { + if (lstat(remove_names[i], &path_stat) < 0) { + continue; + } + if (S_ISDIR(path_stat.st_mode)) { + if (rmdir(remove_names[i]) != -1) { + remove_flag = TRUE; + } + } else { + if (unlink(remove_names[i]) != -1) { + remove_flag = TRUE; + } + } + } + } + return(remove_flag); +} - /* extract the control files */ - info_prefix = (char *) malloc(strlen(pkg->package) + strlen(infodir) + 2 + 5 + 1); - sprintf(info_prefix, "%s/%s.", infodir, pkg->package); - deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL); +int run_package_script(const char *package_name, const char *script_type) +{ + struct stat path_stat; + char *script_path; - /* Create the list file */ - strcat(info_prefix, "list"); - out_stream = wfopen(info_prefix, "w"); - deb_extract(pkg->filename, out_stream, (extract_data_tar_gz | extract_list), NULL, NULL); - fclose(out_stream); + script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21); + sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type); - pkg->state_want = state_want_install; - pkg->state_flag = state_flag_ok; - - if (status == TRUE) { - pkg->state_status = state_status_unpacked; + /* If the file doesnt exist is isnt a fatal */ + if (lstat(script_path, &path_stat) < 0) { + return(EXIT_SUCCESS); } else { - pkg->state_status = state_status_halfinstalled; + return(system(script_path)); } - - return r; } -/* - * Extract and parse the control file from control.tar.gz - */ -static int dpkg_read_control(package_t *pkg) +void all_control_list(char **remove_files, const char *package_name) { - FILE *pkg_file; - char *control_buffer = NULL; + const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm", + "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL }; + int i; - if ((pkg_file = wfopen(pkg->filename, "r")) == NULL) { - return EXIT_FAILURE; + /* Create a list of all /var/lib/dpkg/info/<package> files */ + for(i = 0; i < 10; i++) { + remove_files[i] = xmalloc(strlen(package_name) + strlen(all_extensions[i]) + 21); + sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, all_extensions[i]); } - control_buffer = deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control"); - fill_package_struct(pkg, control_buffer); - return EXIT_SUCCESS; + remove_files[10] = NULL; } -static int dpkg_unpack(package_t *pkgs, void *status) +void remove_package(const unsigned int package_num) { - int r = 0; - package_t *pkg; - - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - dpkg_read_control(pkg); - if ((r = dpkg_dounpack(pkg)) != 0 ) { - break; - } + const char *package_name = name_hashtable[package_hashtable[package_num]->name]; + const unsigned int status_num = search_status_hashtable(package_name); + const int package_name_length = strlen(package_name); + char **remove_files; + char **exclude_files; + char list_name[package_name_length + 25]; + char conffile_name[package_name_length + 30]; + int return_value; + + /* run prerm script */ + return_value = run_package_script(package_name, "prem"); + if (return_value == -1) { + error_msg_and_die("script failed, prerm failure"); } - status_merge(status, pkgs); - return r; -} + /* Create a list of files to remove, and a seperate list of those to keep */ + sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name); + remove_files = create_list(list_name); -static int dpkg_configure(package_t *pkgs, void *status) -{ - int r = 0; - void *found; - package_t *pkg; + sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name); + exclude_files = create_list(conffile_name); - for (pkg = pkgs; pkg != 0 && r == 0; pkg = pkg->next) { - found = tfind(pkg, &status, package_compare); + /* Some directories cant be removed straight away, so do multiple passes */ + while (remove_file_array(remove_files, exclude_files) == TRUE); - if (found == 0) { - error_msg("Trying to configure %s, but it is not installed", pkg->package); - r = 1; - } - /* configure the package listed in the status file; - * not pkg, as we have info only for the latter - */ - else { - r = dpkg_doconfigure(*(package_t **)found); - } - } - status_merge(status, 0); + /* Create a list of all /var/lib/dpkg/info/<package> files */ + remove_files = xmalloc(11); + all_control_list(remove_files, package_name); - return r; + /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */ + exclude_files = xmalloc(sizeof(char*) * 3); + exclude_files[0] = xstrdup(conffile_name); + exclude_files[1] = xmalloc(package_name_length + 27); + sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name); + exclude_files[2] = NULL; + + remove_file_array(remove_files, exclude_files); + + /* rename <package>.conffile to <package>.list */ + rename(conffile_name, list_name); + + /* Change package status */ + set_status(status_num, "deinstall", 1); + set_status(status_num, "config-files", 3); } -static int dpkg_install(package_t *pkgs, void *status) +void purge_package(const unsigned int package_num) { - package_t *p, *ordered = 0; - - /* Stage 1: parse all the control information */ - for (p = pkgs; p != 0; p = p->next) { - dpkg_read_control(p); + const char *package_name = name_hashtable[package_hashtable[package_num]->name]; + const unsigned int status_num = search_status_hashtable(package_name); + char **remove_files; + char **exclude_files; + char list_name[strlen(package_name) + 25]; + + /* run prerm script */ + if (run_package_script(package_name, "prerm") == -1) { + error_msg_and_die("script failed, prerm failure"); } - /* Stage 2: resolve dependencies */ -#ifdef DODEPENDS - ordered = depends_resolve(pkgs, status); -#else - ordered = pkgs; -#endif - - /* Stage 3: install */ - for (p = ordered; p != 0; p = p->next) { - p->state_want = state_want_install; + /* Create a list of files to remove */ + sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name); + remove_files = create_list(list_name); - /* for now the flag is always set to ok... this is probably - * not what we want - */ - p->state_flag = state_flag_ok; + exclude_files = xmalloc(1); + exclude_files[0] = NULL; - DPRINTF("Installing %s\n", p->package); - if (dpkg_dounpack(p) != 0) { - perror_msg(p->filename); - } + /* Some directories cant be removed straight away, so do multiple passes */ + while (remove_file_array(remove_files, exclude_files) == TRUE); - if (dpkg_doconfigure(p) != 0) { - perror_msg(p->filename); - } + /* Create a list of all /var/lib/dpkg/info/<package> files */ + remove_files = xmalloc(11); + all_control_list(remove_files, package_name); + remove_file_array(remove_files, exclude_files); + + /* run postrm script */ + if (run_package_script(package_name, "postrm") == -1) { + error_msg_and_die("postrm fialure.. set status to what?"); } + /* Change package status */ + set_status(status_num, "purge", 1); + set_status(status_num, "not-installed", 3); +} + +void unpack_package(deb_file_t *deb_file) +{ + const unsigned int package_name_num = package_hashtable[deb_file->package]->name; + const char *package_name = name_hashtable[package_name_num]; + const unsigned int status_num = search_status_hashtable(package_name); + unsigned int status_package_num; - if (ordered != 0) { - status_merge(status, pkgs); + FILE *out_stream; + char *info_prefix; + + /* If existing version, remove it first */ + if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) { + /* Package is already installed, remove old version first */ + printf("Preparing to replace %s %s (using %s) ...\n", package_name, + name_hashtable[package_hashtable[status_package_num]->version], + deb_file->filename); + remove_package(status_package_num); + } else { + printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename); } - return 0; + /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */ + info_prefix = (char *) xmalloc(sizeof(package_name) + 20 + 4 + 1); + sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name); + deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL); + + /* Extract data.tar.gz to the root directory */ + deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs), "/", NULL); + + /* Create the list file */ + strcat(info_prefix, "list"); + + out_stream = wfopen(info_prefix, "w"); + deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), NULL, NULL); + fclose(out_stream); + + /* change status */ + set_status(status_num, "install", 1); + set_status(status_num, "unpacked", 3); } -/* - * Not implemented yet - * -static int dpkg_remove(package_t *pkgs, void *status) +void configure_package(deb_file_t *deb_file) { - package_t *p; - - for (p = pkgs; p != 0; p = p->next) - { + int return_value; + int status_num; + + /* Run the preinst prior to extracting */ + return_value = run_package_script(name_hashtable[package_hashtable[deb_file->package]->name], "postinst"); + if (return_value == -1) { + /* TODO: handle failure gracefully */ + error_msg_and_die("postrm fialure.. set status to what?"); } - status_merge(status, 0); - return 0; + /* Change status to reflect success */ + status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file->package]->name]); + set_status(status_num, "install", 1); + set_status(status_num, "installed", 3); } -*/ extern int dpkg_main(int argc, char **argv) { - const int arg_install = 1; - const int arg_unpack = 2; - const int arg_configure = 4; - - package_t *p, *packages = NULL; - void *status = NULL; - int opt = 0; - int optflag = 0; + deb_file_t **deb_file = NULL; + status_node_t *status_node; + char opt = 0; + int package_num; + int dpkg_opt = 0; + int deb_count = 0; + int state_status; + int status_num; + int i; - while ((opt = getopt(argc, argv, "iruc")) != -1) { + while ((opt = getopt(argc, argv, "cF:ilPru")) != -1) { switch (opt) { + case 'c': + dpkg_opt |= dpkg_opt_configure; + dpkg_opt |= dpkg_opt_package_name; + break; + case 'F': // equivalent to --force in official dpkg + if (strcmp(optarg, "depends") == 0) { + dpkg_opt |= dpkg_opt_force_ignore_depends; + } case 'i': - optflag |= arg_install; + dpkg_opt |= dpkg_opt_install; + dpkg_opt |= dpkg_opt_filename; break; - case 'u': - optflag |= arg_unpack; + case 'l': + dpkg_opt |= dpkg_opt_list_installed; + case 'P': + dpkg_opt |= dpkg_opt_purge; + dpkg_opt |= dpkg_opt_package_name; break; - case 'c': - optflag |= arg_configure; + case 'r': + dpkg_opt |= dpkg_opt_remove; + dpkg_opt |= dpkg_opt_package_name; + break; + case 'u': /* Equivalent to --unpack in official dpkg */ + dpkg_opt |= dpkg_opt_unpack; + dpkg_opt |= dpkg_opt_filename; break; default: show_usage(); } } + if ((argc == optind) || (dpkg_opt == 0)) { + show_usage(); + } + + puts("(Reading database ... xxxxx files and directories installed.)"); + index_status_file("/var/lib/dpkg/status"); + + /* Read arguments and store relevant info in structs */ + deb_file = xmalloc(sizeof(deb_file_t)); while (optind < argc) { - p = (package_t *) xcalloc(1, sizeof(package_t)); - if (optflag & arg_configure) { - p->package = xstrdup(argv[optind]); - } else { - p->filename = xstrdup(argv[optind]); + deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t)); + if (dpkg_opt & dpkg_opt_filename) { + deb_file[deb_count]->filename = xstrdup(argv[optind]); + deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control"); + if (deb_file[deb_count]->control_file == NULL) { + error_msg_and_die("Couldnt extract control file"); + } + package_num = fill_package_struct(deb_file[deb_count]->control_file); + + if (package_num == -1) { + error_msg("Invalid control file in %s", argv[optind]); + continue; + } + deb_file[deb_count]->package = (unsigned int) package_num; + /* Add the package to the status hashtable */ + if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) { + status_node = (status_node_t *) xmalloc(sizeof(status_node_t)); + status_node->package = deb_file[deb_count]->package; + /* use reinstreq isnt changed to "ok" until the package control info + * is written to the status file*/ + status_node->status = search_name_hashtable("install reinstreq not-installed"); + + status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); + status_hashtable[status_num] = status_node; + } } - p->next = packages; - packages = p; + else if (dpkg_opt & dpkg_opt_package_name) { + deb_file[deb_count]->filename = NULL; + deb_file[deb_count]->control_file = NULL; + deb_file[deb_count]->package = search_package_hashtable( + search_name_hashtable(argv[optind]), + search_name_hashtable("ANY"), VER_ANY); + if (package_hashtable[deb_file[deb_count]->package] == NULL) { + error_msg_and_die("unknown package, %s\n", argv[optind]); + } + state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3); + /* check package status is "installed" */ + if (dpkg_opt & dpkg_opt_remove) { + if ((strcmp(name_hashtable[state_status], "not-installed") == 0) || + (strcmp(name_hashtable[state_status], "config-files") == 0)) { + error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); + } + } + else if (dpkg_opt & dpkg_opt_purge) { + /* if package status is "conf-files" then its ok */ + if (strcmp(name_hashtable[state_status], "not-installed") == 0) { + error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); + } + } + } + deb_count++; optind++; } + deb_file[deb_count] = NULL; - make_directory((char *)infodir, S_IRWXU, FILEUTILS_RECUR); + /* Check that the deb file arguments are installable */ + /* TODO: check dependencies before removing */ + if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) { + if (!check_deps(deb_file, 0, deb_count)) { + error_msg_and_die("Dependency check fialed"); + } + } - status = status_read(); + for (i = 0; i < deb_count; i++) { + /* Remove or purge packages */ + if (dpkg_opt & dpkg_opt_remove) { + remove_package(deb_file[i]->package); + } + else if (dpkg_opt & dpkg_opt_purge) { + purge_package(deb_file[i]->package); + } + else if (dpkg_opt & dpkg_opt_unpack) { + unpack_package(deb_file[i]); + } + else if (dpkg_opt & dpkg_opt_install) { + unpack_package(deb_file[i]); + configure_package(deb_file[i]); + } + else if (dpkg_opt & dpkg_opt_configure) { + configure_package(deb_file[i]); + } + } - if (optflag & arg_install) { - return dpkg_install(packages, status); + write_status_file(deb_file); + + for (i = 0; i < NAME_HASH_PRIME; i++) { + if (name_hashtable[i] != NULL) { + free(name_hashtable[i]); + } } - else if (optflag & arg_unpack) { - return dpkg_unpack(packages, status); + for (i = 0; i < PACKAGE_HASH_PRIME; i++) { + free_package(package_hashtable[i]); } - else if (optflag & arg_configure) { - return dpkg_configure(packages, status); + for (i = 0; i < STATUS_HASH_PRIME; i++) { + if (status_hashtable[i] != NULL) { + free(status_hashtable[i]); + } } + return(EXIT_FAILURE); } + @@ -1,854 +1,1423 @@ -#include <ctype.h> -#include <dirent.h> +/* + * Mini dpkg implementation for busybox. + * This is not meant as a replacemnt for dpkg + * + * Copyright (C) 2001 by Glenn McGrath + * + * Started life as a busybox implementation of udpkg + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Library General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +/* + * Known difference between busybox dpkg and the official dpkg that i dont + * consider important, its worth keeping a note of differences anyway, just to + * make it easier to maintain. + * - The first value for the Confflile: field isnt placed on a new line. + * - The <package>.control file is extracted and kept in the info dir. + * - When installing a package the Status: field is placed at the end of the + * section, rather than just after the Package: field. + * - Packages with previously unknown status are inserted at the begining of + * the status file + * + * Bugs that need to be fixed + * - (unknown, please let me know when you find any) + * + */ + #include <getopt.h> -#include <stdio.h> -#include <string.h> #include <stdlib.h> -#include <search.h> -#include <errno.h> -#include <fcntl.h> +#include <string.h> #include <unistd.h> -#include <utime.h> -#include <sys/types.h> -#include <sys/stat.h> - #include "busybox.h" -#define DEPENDSMAX 64 /* maximum number of depends we can handle */ - -/* Should we do full dependency checking? */ -//#define DODEPENDS 0 - -/* Should we do debugging? */ -//#define DODEBUG 0 - -#ifdef DODEBUG -#define SYSTEM(x) do_system(x) -#define DPRINTF(fmt,args...) fprintf(stderr, fmt, ##args) -#else -#define SYSTEM(x) system(x) -#define DPRINTF(fmt,args...) /* nothing */ -#endif - -/* from dpkg-deb.c */ - -static const char statusfile[] = "/var/lib/dpkg/status.udeb"; -static const char new_statusfile[] = "/var/lib/dpkg/status.udeb.new"; -static const char bak_statusfile[] = "/var/lib/dpkg/status.udeb.bak"; - -static const char infodir[] = "/var/lib/dpkg/info/"; -static const char udpkg_quiet[] = "UDPKG_QUIET"; - -//static const int status_want_unknown = 1; -static const int state_want_install = 2; -//static const int state_want_hold = 3; -//static const int state_want_deinstall = 4; -//static const int state_want_purge = 5; - -static const int state_flag_ok = 1; -//static const int state_flag_reinstreq = 2; -//static const int state_flag_hold = 3; -//static const int state_flag_holdreinstreq = 4; - -//static const int state_statusnoninstalled = 1; -static const int state_status_unpacked = 2; -static const int state_status_halfconfigured = 3; -static const int state_status_installed = 4; -static const int state_status_halfinstalled = 5; -//static const int state_statusconfigfiles = 6; -//static const int state_statuspostinstfailed = 7; -//static const int state_statusremovalfailed = 8; - -static const char *state_words_want[] = { "unknown", "install", "hold", "deinstall", "purge", 0 }; -static const char *state_words_flag[] = { "ok", "reinstreq", "hold", "hold-reinstreq", 0 }; -static const char *state_words_status[] = { "not-installed", "unpacked", "half-configured", "installed", - "half-installed", "config-files", "post-inst-failed", "removal-failed", 0 }; - -static const int color_white = 0; -static const int color_grey = 1; -static const int color_black = 2; - -/* data structures */ -typedef struct package_s { - char *filename; - char *package; - unsigned char state_want; - unsigned char state_flag; - unsigned char state_status; - char *depends; - char *provides; - char *description; - char *priority; - char *section; - char *installed_size; - char *maintainer; - char *source; - char *version; - char *pre_depends; - char *replaces; - char *recommends; - char *suggests; - char *conflicts; - char *conffiles; - char *long_description; - char *architecture; - char *md5sum; - int installer_menu_item; - char color; /* for topo-sort */ - struct package_s *requiredfor[DEPENDSMAX]; - unsigned short requiredcount; - struct package_s *next; -} package_t; - -#ifdef DODEBUG -static int do_system(const char *cmd) -{ - DPRINTF("cmd is %s\n", cmd); - return system(cmd); -} -#else -#define do_system(cmd) system(cmd) -#endif +/* NOTE: If you vary HASH_PRIME sizes be aware, + * 1) Tweaking these will have a big effect on how much memory this program uses. + * 2) For computational efficiency these hash tables should be at least 20% + * larger than the maximum number of elements stored in it. + * 3) All _HASH_PRIME's must be a prime number or chaos is assured, if your looking + * for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt + * 4) If you go bigger than 15 bits you may get into trouble (untested) as its + * sometimes cast to an unsigned int, if you go to 16 bit you will overlap + * int's and chaos is assured, 16381 is the max prime for 14 bit field + */ -static int package_compare(const void *p1, const void *p2) -{ - return strcmp(((package_t *)p1)->package, - ((package_t *)p2)->package); -} +/* NAME_HASH_PRIME, Stores package names and versions, + * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME, + * as there a lot of duplicate version numbers */ +#define NAME_HASH_PRIME 16381 +char *name_hashtable[NAME_HASH_PRIME + 1]; + +/* PACKAGE_HASH_PRIME, Maximum number of unique packages, + * It must not be smaller than STATUS_HASH_PRIME, + * Currently only packages from status_hashtable are stored in here, but in + * future this may be used to store packages not only from a status file, + * but an available_hashtable, and even multiple packages files. + * Package can be stored more than once if they have different versions. + * e.g. The same package may have different versions in the status file + * and available file */ +#define PACKAGE_HASH_PRIME 10007 +typedef struct edge_s { + unsigned int operator:3; + unsigned int type:4; + unsigned int name:14; + unsigned int version:14; +} edge_t; + +typedef struct common_node_s { + unsigned int name:14; + unsigned int version:14; + unsigned int num_of_edges:14; + edge_t **edge; +} common_node_t; +common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1]; + +/* Currently it doesnt store packages that have state-status of not-installed + * So it only really has to be the size of the maximum number of packages + * likely to be installed at any one time, so there is a bit of leaway here */ +#define STATUS_HASH_PRIME 8191 +typedef struct status_node_s { + unsigned int package:14; /* has to fit PACKAGE_HASH_PRIME */ + unsigned int status:14; /* has to fit STATUS_HASH_PRIME */ +} status_node_t; +status_node_t *status_hashtable[STATUS_HASH_PRIME + 1]; + +/* Even numbers are for 'extras', like ored dependecies or null */ +enum edge_type_e { + EDGE_NULL = 0, + EDGE_PRE_DEPENDS = 1, + EDGE_OR_PRE_DEPENDS = 2, + EDGE_DEPENDS = 3, + EDGE_OR_DEPENDS = 4, + EDGE_REPLACES = 5, + EDGE_PROVIDES = 7, + EDGE_CONFLICTS = 9, + EDGE_SUGGESTS = 11, + EDGE_RECOMMENDS = 13, + EDGE_ENHANCES = 15 +}; +enum operator_e { + VER_NULL = 0, + VER_EQUAL = 1, + VER_LESS = 2, + VER_LESS_EQUAL = 3, + VER_MORE = 4, + VER_MORE_EQUAL = 5, + VER_ANY = 6 +}; + +enum dpkg_opt_e { + dpkg_opt_purge = 1, + dpkg_opt_remove = 2, + dpkg_opt_unpack = 4, + dpkg_opt_configure = 8, + dpkg_opt_install = 16, + dpkg_opt_package_name = 32, + dpkg_opt_filename = 64, + dpkg_opt_list_installed = 128, + dpkg_opt_force_ignore_depends = 256 +}; + +typedef struct deb_file_s { + char *control_file; + char *filename; + unsigned int package:14; +} deb_file_t; -#ifdef DODEPENDS -static char **depends_split(const char *dependsstr) +void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime) { - static char *dependsvec[DEPENDSMAX]; - char *p; - int i = 0; + unsigned long int hash_num = key[0]; + int len = strlen(key); + int i; - dependsvec[0] = 0; - if (dependsstr == 0) { - goto end; + /* Maybe i should have uses a "proper" hashing algorithm here instead + * of making one up myself, seems to be working ok though. */ + for(i = 1; i < len; i++) { + /* shifts the ascii based value and adds it to previous value + * shift amount is mod 24 because long int is 32 bit and data + * to be shifted is 8, dont want to shift data to where it has + * no effect*/ + hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24)); } + *start = (unsigned int) hash_num % hash_prime; + *decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1)); +} - p = xstrdup(dependsstr); - while (*p != 0 && *p != '\n') { - if (*p != ' ') { - if (*p == ',') { - *p = 0; - dependsvec[++i] = 0; - } else { - if (dependsvec[i] == 0) { - dependsvec[i] = p; - } - } +/* this adds the key to the hash table */ +int search_name_hashtable(const char *key) +{ + unsigned int probe_address = 0; + unsigned int probe_decrement = 0; + + make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME); + while(name_hashtable[probe_address] != NULL) { + if (strcmp(name_hashtable[probe_address], key) == 0) { + return(probe_address); } else { - *p = 0; /* eat the space... */ + probe_address -= probe_decrement; + if ((int)probe_address < 0) { + probe_address += NAME_HASH_PRIME; + } } - p++; } - *p = 0; + name_hashtable[probe_address] = xstrdup(key); -end: - dependsvec[i+1] = 0; - return dependsvec; + return(probe_address); } -/* Topological sort algorithm: - * ordered is the output list, pkgs is the dependency graph, pkg is - * the current node - * - * recursively add all the adjacent nodes to the ordered list, marking - * each one as visited along the way - * - * yes, this algorithm looks a bit odd when all the params have the - * same type :-) +/* this DOESNT add the key to the hashtable + * TODO make it consistent with search_name_hashtable */ -static void depends_sort_visit(package_t **ordered, package_t *pkgs, - package_t *pkg) +unsigned int search_status_hashtable(const char *key) { - unsigned short i; - - /* mark node as processing */ - pkg->color = color_grey; - - /* visit each not-yet-visited node */ - for (i = 0; i < pkg->requiredcount; i++) - if (pkg->requiredfor[i]->color == color_white) - depends_sort_visit(ordered, pkgs, pkg->requiredfor[i]); - -#if 0 - /* add it to the list */ - newnode = (struct package_t *)xmalloc(sizeof(struct package_t)); - /* make a shallow copy */ - *newnode = *pkg; - newnode->next = *ordered; - *ordered = newnode; -#endif - - pkg->next = *ordered; - *ordered = pkg; - - /* mark node as done */ - pkg->color = color_black; + unsigned int probe_address = 0; + unsigned int probe_decrement = 0; + + make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME); + while(status_hashtable[probe_address] != NULL) { + if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) { + break; + } else { + probe_address -= probe_decrement; + if ((int)probe_address < 0) { + probe_address += STATUS_HASH_PRIME; + } + } + } + return(probe_address); } -static package_t *depends_sort(package_t *pkgs) +/* Need to rethink version comparison, maybe the official dpkg has something i can use ? */ +int version_compare_part(const char *version1, const char *version2) { - /* TODO: it needs to break cycles in the to-be-installed package - * graph... */ - package_t *ordered = NULL; - package_t *pkg; - - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - pkg->color = color_white; + int upstream_len1 = 0; + int upstream_len2 = 0; + char *name1_char; + char *name2_char; + int len1 = 0; + int len2 = 0; + int tmp_int; + int ver_num1; + int ver_num2; + + if (version1 == NULL) { + version1 = xstrdup(""); + } + if (version2 != NULL) { + version2 = xstrdup(""); } - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - if (pkg->color == color_white) { - depends_sort_visit(&ordered, pkgs, pkg); + upstream_len1 = strlen(version1); + upstream_len2 = strlen(version2); + + while ((len1 < upstream_len1) || (len2 < upstream_len2)) { + /* Compare non-digit section */ + tmp_int = strcspn(&version1[len1], "0123456789"); + name1_char = xstrndup(&version1[len1], tmp_int); + len1 += tmp_int; + tmp_int = strcspn(&version2[len2], "0123456789"); + name2_char = xstrndup(&version2[len2], tmp_int); + len2 += tmp_int; + tmp_int = strcmp(name1_char, name2_char); + free(name1_char); + free(name2_char); + if (tmp_int != 0) { + return(tmp_int); + } + + /* Compare digits */ + tmp_int = strspn(&version1[len1], "0123456789"); + name1_char = xstrndup(&version1[len1], tmp_int); + len1 += tmp_int; + tmp_int = strspn(&version2[len2], "0123456789"); + name2_char = xstrndup(&version2[len2], tmp_int); + len2 += tmp_int; + ver_num1 = atoi(name1_char); + ver_num2 = atoi(name2_char); + free(name1_char); + free(name2_char); + if (ver_num1 < ver_num2) { + return(-1); } + else if (ver_num1 > ver_num2) { + return(1); + } + } + return(0); +} + +/* if ver1 < ver2 return -1, + * if ver1 = ver2 return 0, + * if ver1 > ver2 return 1, + */ +int version_compare(const unsigned int ver1, const unsigned int ver2) +{ + char *ch_ver1 = name_hashtable[ver1]; + char *ch_ver2 = name_hashtable[ver2]; + + char epoch1, epoch2; + char *deb_ver1, *deb_ver2; + char *ver1_ptr, *ver2_ptr; + char *upstream_ver1; + char *upstream_ver2; + int result; + + /* Compare epoch */ + if (ch_ver1[1] == ':') { + epoch1 = ch_ver1[0]; + ver1_ptr = strchr(ch_ver1, ':') + 1; + } else { + epoch1 = '0'; + ver1_ptr = ch_ver1; + } + if (ch_ver2[1] == ':') { + epoch2 = ch_ver2[0]; + ver2_ptr = strchr(ch_ver2, ':') + 1; + } else { + epoch2 = '0'; + ver2_ptr = ch_ver2; + } + if (epoch1 < epoch2) { + return(-1); } + else if (epoch1 > epoch2) { + return(1); + } + + /* Compare upstream version */ + upstream_ver1 = xstrdup(ver1_ptr); + upstream_ver2 = xstrdup(ver2_ptr); + + /* Chop off debian version, and store for later use */ + deb_ver1 = strrchr(upstream_ver1, '-'); + deb_ver2 = strrchr(upstream_ver2, '-'); + if (deb_ver1) { + deb_ver1[0] = '\0'; + deb_ver1++; + } + if (deb_ver2) { + deb_ver2[0] = '\0'; + deb_ver2++; + } + result = version_compare_part(upstream_ver1, upstream_ver2); + + free(upstream_ver1); + free(upstream_ver2); - /* Leaks the old list... return the new one... */ - return ordered; + if (result != 0) { + return(result); + } + + /* Compare debian versions */ + return(version_compare_part(deb_ver1, deb_ver2)); +} + +int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator) +{ + const int version_result = version_compare(version1, version2); + switch(operator) { + case (VER_ANY): + return(TRUE); + case (VER_EQUAL): + if (version_result == 0) { + return(TRUE); + } + break; + case (VER_LESS): + if (version_result < 0) { + return(TRUE); + } + break; + case (VER_LESS_EQUAL): + if (version_result <= 0) { + return(TRUE); + } + break; + case (VER_MORE): + if (version_result > 0) { + return(TRUE); + } + break; + case (VER_MORE_EQUAL): + if (version_result >= 0) { + return(TRUE); + } + break; + } + return(FALSE); } -/* resolve package dependencies -- - * for each package in the list of packages to be installed, we parse its - * dependency info to determine if the dependent packages are either - * already installed, or are scheduled to be installed. If both tests fail - * than bail. - * - * The algorithm here is O(n^2*m) where n = number of packages to be - * installed and m is the # of dependencies per package. Not a terribly - * efficient algorithm, but given that at any one time you are unlikely - * to install a very large number of packages it doesn't really matter - */ -static package_t *depends_resolve(package_t *pkgs, void *status) +int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator) { - package_t *pkg, *chk; - package_t dependpkg; - char **dependsvec; - int i; - void *found; - - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - dependsvec = depends_split(pkg->depends); - i = 0; - while (dependsvec[i] != 0) { - /* Check for dependencies; first look for installed packages */ - dependpkg.package = dependsvec[i]; - if (((found = tfind(&dependpkg, &status, package_compare)) == 0) || - ((chk = *(package_t **)found) && (chk->state_flag & state_flag_ok) && - (chk->state_status & state_status_installed))) { - - /* if it fails, we look through the list of packages we are going to - * install */ - for (chk = pkgs; chk != 0; chk = chk->next) { - if (strcmp(chk->package, dependsvec[i]) == 0 || (chk->provides && - strncmp(chk->provides, dependsvec[i], strlen(dependsvec[i])) == 0)) { - if (chk->requiredcount >= DEPENDSMAX) { - error_msg("Too many dependencies for %s", chk->package); - return 0; - } - if (chk != pkg) { - chk->requiredfor[chk->requiredcount++] = pkg; - } - break; - } - } - if (chk == 0) { - error_msg("%s depends on %s, but it is not going to be installed", pkg->package, dependsvec[i]); - return 0; - } + unsigned int probe_address = 0; + unsigned int probe_decrement = 0; + + make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME); + while(package_hashtable[probe_address] != NULL) { + if (package_hashtable[probe_address]->name == name) { + if (operator == VER_ANY) { + return(probe_address); + } + if (test_version(package_hashtable[probe_address]->version, version, operator)) { + return(probe_address); } - i++; + } + probe_address -= probe_decrement; + if ((int)probe_address < 0) { + probe_address += PACKAGE_HASH_PRIME; } } - - return depends_sort(pkgs); + return(probe_address); } -#endif - -/* Status file handling routines - * - * This is a fairly minimalistic implementation. there are two main functions - * that are supported: - * - * 1) reading the entire status file: - * the status file is read into memory as a binary-tree, with just the - * package and status info preserved - * - * 2) merging the status file - * control info from (new) packages is merged into the status file, - * replacing any pre-existing entries. when a merge happens, status info - * read using the status_read function is written back to the status file + +/* + * Create one new node and one new edge for every dependency. */ -static unsigned char status_parse(const char *line, const char **status_words) +void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type) { - unsigned char status_num; - int i = 0; + char *line = xstrdup(whole_line); + char *line2; + char *line_ptr1 = NULL; + char *line_ptr2 = NULL; + char *field; + char *field2; + char *version; + edge_t *edge; + int offset_ch; + int type; + + field = strtok_r(line, ",", &line_ptr1); + do { + line2 = xstrdup(field); + field2 = strtok_r(line2, "|", &line_ptr2); + if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) { + type = EDGE_OR_DEPENDS; + } + else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) { + type = EDGE_OR_PRE_DEPENDS; + } else { + type = edge_type; + } + + do { + edge = (edge_t *) xmalloc(sizeof(edge_t)); + edge->type = type; + + /* Skip any extra leading spaces */ + field2 += strspn(field2, " "); + + /* Get dependency version info */ + version = strchr(field2, '('); + if (version == NULL) { + edge->operator = VER_ANY; + /* Get the versions hash number, adding it if the number isnt already in there */ + edge->version = search_name_hashtable("ANY"); + } else { + /* Skip leading ' ' or '(' */ + version += strspn(field2, " "); + version += strspn(version, "("); + /* Calculate length of any operator charactors */ + offset_ch = strspn(version, "<=>"); + /* Determine operator */ + if (offset_ch > 0) { + if (strncmp(version, "=", offset_ch) == 0) { + edge->operator = VER_EQUAL; + } + else if (strncmp(version, "<<", offset_ch) == 0) { + edge->operator = VER_LESS; + } + else if (strncmp(version, "<=", offset_ch) == 0) { + edge->operator = VER_LESS_EQUAL; + } + else if (strncmp(version, ">>", offset_ch) == 0) { + edge->operator = VER_MORE; + } + else if (strncmp(version, ">=", offset_ch) == 0) { + edge->operator = VER_MORE_EQUAL; + } else { + error_msg_and_die("Illegal operator\n"); + } + } + /* skip to start of version numbers */ + version += offset_ch; + version += strspn(version, " "); + + /* Truncate version at trailing ' ' or ')' */ + version[strcspn(version, " )")] = '\0'; + /* Get the versions hash number, adding it if the number isnt already in there */ + edge->version = search_name_hashtable(version); + } + + /* Get the dependency name */ + field2[strcspn(field2, " (")] = '\0'; + edge->name = search_name_hashtable(field2); + + /* link the new edge to the current node */ + parent_node->num_of_edges++; + parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1)); + parent_node->edge[parent_node->num_of_edges - 1] = edge; + } while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL); + free(line2); + } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL); + free(line); - while (status_words[i] != 0) { - if (strncmp(line, status_words[i], strlen(status_words[i])) == 0) { - status_num = (char)i; - return(status_num); + return; +} + +void free_package(common_node_t *node) +{ + int i; + if (node != NULL) { + for (i = 0; i < node->num_of_edges; i++) { + if (node->edge[i] != NULL) { + free(node->edge[i]); + } + } + if (node->edge != NULL) { + free(node->edge); + } + if (node != NULL) { + free(node); } - i++; } - /* parse error */ - error_msg("Invalid status word"); - return(0); } -/* - * Read the buffered control file and parse it, - * filling parsed fields into the package structure - */ -static int fill_package_struct(package_t *package, const char *package_buffer) +unsigned int fill_package_struct(char *control_buffer) { - char *field = NULL; + common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t)); + + char *field; + char *field_name; + char *field_value; int field_start = 0; - int field_length = 0; + int field_length; + int seperator_offset; + int num = -1; + int buffer_length = strlen(control_buffer); + + new_node->version = search_name_hashtable("unknown"); + while (field_start < buffer_length) { + field = read_package_field(&control_buffer[field_start]); - while ((field = read_package_field(&package_buffer[field_start])) != NULL) { + /* Setup start point for next field */ field_length = strlen(field); field_start += (field_length + 1); - if (strlen(field) == 0) { - printf("empty line: *this shouldnt happen i dont think*\n"); - break; - } + seperator_offset = strcspn(field, ":"); + field_name = xstrndup(field, seperator_offset); + field_value = field + seperator_offset + 1; + field_value += strspn(field_value, " \n\t"); - /* these are common to both installed and uninstalled packages */ - if (strstr(field, "Package: ") == field) { - package->package = strdup(field + 9); - } - else if (strstr(field, "Depends: ") == field) { - package->depends = strdup(field + 9); - } - else if (strstr(field, "Provides: ") == field) { - package->provides = strdup(field + 10); + if (strcmp(field_name, "Package") == 0) { + new_node->name = search_name_hashtable(field_value); } - /* This is specific to the Debian Installer. Ifdef? */ - else if (strstr(field, "installer-menu-item: ") == field) { - package->installer_menu_item = atoi(field + 21); + else if (strcmp(field_name, "Version") == 0) { + new_node->version = search_name_hashtable(field_value); } - else if (strstr(field, "Description: ") == field) { - package->description = strdup(field + 13); + else if (strcmp(field_name, "Pre-Depends") == 0) { + add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS); } - else if (strstr(field, "Priority: ") == field) { - package->priority = strdup(field + 10); + else if (strcmp(field_name, "Depends") == 0) { + add_split_dependencies(new_node, field_value, EDGE_DEPENDS); } - else if (strstr(field, "Section: ") == field) { - package->section = strdup(field + 9); + else if (strcmp(field_name, "Replaces") == 0) { + add_split_dependencies(new_node, field_value, EDGE_REPLACES); } - else if (strstr(field, "Installed-Size: ") == field) { - package->installed_size = strdup(field + 16); + else if (strcmp(field_name, "Provides") == 0) { + add_split_dependencies(new_node, field_value, EDGE_PROVIDES); } - else if (strstr(field, "Maintainer: ") == field) { - package->maintainer = strdup(field + 12); + else if (strcmp(field_name, "Conflicts") == 0) { + add_split_dependencies(new_node, field_value, EDGE_CONFLICTS); } - else if (strstr(field, "Version: ") == field) { - package->version = strdup(field + 9); - } - else if (strstr(field, "Suggests: ") == field) { - package->suggests = strdup(field + 10); - } - else if (strstr(field, "Recommends: ") == field) { - package->recommends = strdup(field + 12); - } -/* else if (strstr(field, "Conffiles: ") == field) { - package->conffiles = read_block(file); - package->conffiles = xcalloc(1, 1); - while ((field = strtok(NULL, "\n")) != NULL) { - package->long_description = xrealloc(package->conffiles, - strlen(package->conffiles) + strlen(field) + 1); - strcat(package->conffiles, field); - } - } -*/ - /* These are only in available file */ - else if (strstr(field, "Architecture: ") == field) { - package->architecture = strdup(field + 14); + else if (strcmp(field_name, "Suggests") == 0) { + add_split_dependencies(new_node, field_value, EDGE_SUGGESTS); } - else if (strstr(field, "Filename: ") == field) { - package->filename = strdup(field + 10); + else if (strcmp(field_name, "Recommends") == 0) { + add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS); } - else if (strstr(field, "MD5sum ") == field) { - package->md5sum = strdup(field + 7); + else if (strcmp(field_name, "Enhances") == 0) { + add_split_dependencies(new_node, field_value, EDGE_ENHANCES); } - - /* This is only needed for status file */ - if (strstr(field, "Status: ") == field) { - char *word_pointer; - - word_pointer = strchr(field, ' ') + 1; - package->state_want = status_parse(word_pointer, state_words_want); - word_pointer = strchr(word_pointer, ' ') + 1; - package->state_flag = status_parse(word_pointer, state_words_flag); - word_pointer = strchr(word_pointer, ' ') + 1; - package->state_status = status_parse(word_pointer, state_words_status); - } else { - package->state_want = status_parse("purge", state_words_want); - package->state_flag = status_parse("ok", state_words_flag); - package->state_status = status_parse("not-installed", state_words_status); - } - + free(field_name); free(field); } - return EXIT_SUCCESS; + if (new_node->version == search_name_hashtable("unknown")) { + free_package(new_node); + return(-1); + } + num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL); + if (package_hashtable[num] == NULL) { + package_hashtable[num] = new_node; + } else { + free_package(new_node); + } + return(num); } -extern void write_package(FILE *out_file, package_t *pkg) +/* if num = 1, it returns the want status, 2 returns flag, 3 returns status */ +unsigned int get_status(const unsigned int status_node, const int num) { - if (pkg->package) { - fprintf(out_file, "Package: %s\n", pkg->package); - } - if ((pkg->state_want != 0) || (pkg->state_flag != 0)|| (pkg->state_status != 0)) { - fprintf(out_file, "Status: %s %s %s\n", - state_words_want[pkg->state_want - 1], - state_words_flag[pkg->state_flag - 1], - state_words_status[pkg->state_status - 1]); - } - if (pkg->depends) { - fprintf(out_file, "Depends: %s\n", pkg->depends); - } - if (pkg->provides) { - fprintf(out_file, "Provides: %s\n", pkg->provides); - } - if (pkg->priority) { - fprintf(out_file, "Priority: %s\n", pkg->priority); - } - if (pkg->section) { - fprintf(out_file, "Section: %s\n", pkg->section); - } - if (pkg->section) { - fprintf(out_file, "Installed-Size: %s\n", pkg->installed_size); - } - if (pkg->maintainer) { - fprintf(out_file, "Maintainer: %s\n", pkg->maintainer); - } - if (pkg->source) { - fprintf(out_file, "Source: %s\n", pkg->source); - } - if (pkg->version) { - fprintf(out_file, "Version: %s\n", pkg->version); - } - if (pkg->pre_depends) { - fprintf(out_file, "Pre-depends: %s\n", pkg->pre_depends); - } - if (pkg->replaces) { - fprintf(out_file, "Replaces: %s\n", pkg->replaces); - } - if (pkg->recommends) { - fprintf(out_file, "Recommends: %s\n", pkg->recommends); - } - if (pkg->suggests) { - fprintf(out_file, "Suggests: %s\n", pkg->suggests); - } - if (pkg->conflicts) { - fprintf(out_file, "Conflicts: %s\n", pkg->conflicts); - } - if (pkg->conffiles) { - fprintf(out_file, "Conf-files: %s\n", pkg->conffiles); - } - if (pkg->architecture) { - fprintf(out_file, "Architecture: %s\n", pkg->architecture); - } - if (pkg->filename) { - fprintf(out_file, "Filename: %s\n", pkg->filename); - } - if (pkg->md5sum) { - fprintf(out_file, "MD5sum: %s\n", pkg->md5sum); + char *status_string = name_hashtable[status_hashtable[status_node]->status]; + char *state_sub_string; + unsigned int state_sub_num; + int len; + int i; + + /* set tmp_string to point to the start of the word number */ + for (i = 1; i < num; i++) { + /* skip past a word */ + status_string += strcspn(status_string, " "); + /* skip past the seperating spaces */ + status_string += strspn(status_string, " "); } - if (pkg->installer_menu_item) { - fprintf(out_file, "installer-main-menu %d\n", pkg->installer_menu_item); + len = strcspn(status_string, " \n\0"); + state_sub_string = xstrndup(status_string, len); + state_sub_num = search_name_hashtable(state_sub_string); + free(state_sub_string); + return(state_sub_num); +} + +void set_status(const unsigned int status_node_num, const char *new_value, const int position) +{ + const unsigned int new_value_len = strlen(new_value); + const unsigned int new_value_num = search_name_hashtable(new_value); + unsigned int want = get_status(status_node_num, 1); + unsigned int flag = get_status(status_node_num, 2); + unsigned int status = get_status(status_node_num, 3); + int want_len = strlen(name_hashtable[want]); + int flag_len = strlen(name_hashtable[flag]); + int status_len = strlen(name_hashtable[status]); + char *new_status; + + switch (position) { + case (1): + want = new_value_num; + want_len = new_value_len; + break; + case (2): + flag = new_value_num; + flag_len = new_value_len; + break; + case (3): + status = new_value_num; + status_len = new_value_len; + break; + default: + error_msg_and_die("DEBUG ONLY: this shouldnt happen"); } - if (pkg->description) { - fprintf(out_file, "Description: %s\n", pkg->description); + + new_status = (char *) xmalloc(want_len + flag_len + status_len + 3); + sprintf(new_status, "%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]); + status_hashtable[status_node_num]->status = search_name_hashtable(new_status); + return; +} + +void index_status_file(const char *filename) +{ + FILE *status_file; + char *control_buffer; + char *status_line; + status_node_t *status_node = NULL; + unsigned int status_num; + + status_file = fopen(filename, "r"); + while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) { + const unsigned int package_num = fill_package_struct(control_buffer); + if (package_num != -1) { + status_node = xmalloc(sizeof(status_node_t)); + /* fill_package_struct doesnt handle the status field */ + status_line = strstr(control_buffer, "Status:"); + if (status_line != NULL) { + status_line += 7; + status_line += strspn(status_line, " \n\t"); + status_line = xstrndup(status_line, strcspn(status_line, "\n\0")); + status_node->status = search_name_hashtable(status_line); + free(status_line); + } + status_node->package = package_num; + status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]); + status_hashtable[status_num] = status_node; + } + free(control_buffer); } - fputc('\n', out_file); - pkg = pkg->next; + fclose(status_file); + return; } -static void *status_read(void) + +char *get_depends_field(common_node_t *package, const int depends_type) { - FILE *f; - void *status = 0; - package_t *m = 0, *p = 0, *t = 0; - char *package_control_buffer = NULL; + char *depends = NULL; + char *old_sep = (char *)xcalloc(1, 3); + char *new_sep = (char *)xcalloc(1, 3); + int line_size = 0; + int depends_size; - if (getenv(udpkg_quiet) == NULL) { - printf("(Reading database...)\n"); - } + int i; - if ((f = wfopen(statusfile, "r")) == NULL) { - return(NULL); - } + for (i = 0; i < package->num_of_edges; i++) { + if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) || + (package->edge[i]->type == EDGE_OR_DEPENDS)) { + } - while ( (package_control_buffer = fgets_str(f, "\n\n")) != NULL) { - m = (package_t *)xcalloc(1, sizeof(package_t)); - fill_package_struct(m, package_control_buffer); - if (m->package) { - /* - * If there is an item in the tree by this name, - * it must be a virtual package; insert real - * package in preference. - */ - tdelete(m, &status, package_compare); - tsearch(m, &status, package_compare); - if (m->provides) { - /* - * A "Provides" triggers the insertion - * of a pseudo package into the status - * binary-tree. - */ - p = (package_t *)xcalloc(1, sizeof(package_t)); - p->package = xstrdup(m->provides); - t = *(package_t **)tsearch(p, &status, package_compare); - if (t != p) { - free(p->package); - free(p); + if ((package->edge[i]->type == depends_type) || + (package->edge[i]->type == depends_type + 1)) { + /* Check if its the first time through */ + + depends_size = 8 + strlen(name_hashtable[package->edge[i]->name]) + + strlen(name_hashtable[package->edge[i]->version]); + line_size += depends_size; + depends = (char *) xrealloc(depends, line_size + 1); + + /* Check to see if this dependency is the type we are looking for + * +1 to check for 'extra' types, e.g. ored dependecies */ + strcpy(old_sep, new_sep); + if (package->edge[i]->type == depends_type) { + strcpy(new_sep, ", "); + } + else if (package->edge[i]->type == depends_type + 1) { + strcpy(new_sep, "| "); + } + + if (depends_size == line_size) { + strcpy(depends, ""); + } else { + if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) { + strcat(depends, " | "); } else { - /* - * Pseudo package status is the - * same as the status of the - * package providing it - * FIXME: (not quite right, if 2 - * packages of different statuses - * provide it). - */ - t->state_want = m->state_want; - t->state_flag = m->state_flag; - t->state_status = m->state_status; + strcat(depends, ", "); } } - } - else { - free(m); + + strcat(depends, name_hashtable[package->edge[i]->name]); + if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) { + if (package->edge[i]->operator == VER_EQUAL) { + strcat(depends, " (= "); + } + else if (package->edge[i]->operator == VER_LESS) { + strcat(depends, " (<< "); + } + else if (package->edge[i]->operator == VER_LESS_EQUAL) { + strcat(depends, " (<= "); + } + else if (package->edge[i]->operator == VER_MORE) { + strcat(depends, " (>> "); + } + else if (package->edge[i]->operator == VER_MORE_EQUAL) { + strcat(depends, " (>= "); + } else { + strcat(depends, " ("); + } + strcat(depends, name_hashtable[package->edge[i]->version]); + strcat(depends, ")"); + } } } - fclose(f); - return status; + return(depends); } -static int status_merge(void *status, package_t *pkgs) +/* This could do with a cleanup */ +void write_status_file(deb_file_t **deb_file) { - FILE *fin, *fout; - char *line = NULL; - package_t *pkg = 0, *statpkg = 0; - package_t locpkg; + FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r"); + FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w"); + char *package_name; + char *status_from_file; + char *control_buffer = NULL; + char *tmp_string; + char *field; + int status_num; + int field_length; + int field_start = 0; + int buffer_length; + int write_flag; + int i = 0; - if ((fout = wfopen(new_statusfile, "w")) == NULL) { - return 0; - } - if (getenv(udpkg_quiet) == NULL) { - printf("(Updating database...)\n"); - } + /* Update previously known packages */ + while ((control_buffer = fgets_str(old_status_file, "\n\n")) != NULL) { + tmp_string = strstr(control_buffer, "Package:") + 8; + tmp_string += strspn(tmp_string, " \n\t"); + package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0")); + write_flag = FALSE; + + tmp_string = strstr(control_buffer, "Status:"); + if (tmp_string != NULL) { + /* Seperate the status value from the control buffer */ + tmp_string += 7; + tmp_string += strspn(tmp_string, " \n\t"); + status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n")); + } else { + status_from_file = NULL; + } - /* - * Dont use wfopen here, handle errors ourself - */ - if ((fin = fopen(statusfile, "r")) != NULL) { - while (((line = get_line_from_file(fin)) != NULL) && !feof(fin)) { - chomp(line); /* trim newline */ - /* If we see a package header, find out if it's a package - * that we have processed. if so, we skip that block for - * now (write it at the end). - * - * we also look at packages in the status cache and update - * their status fields - */ - if (strstr(line, "Package: ") == line) { - for (pkg = pkgs; pkg != 0 && strcmp(line + 9, - pkg->package) != 0; pkg = pkg->next) ; - - locpkg.package = line + 9; - statpkg = tfind(&locpkg, &status, package_compare); - - /* note: statpkg should be non-zero, unless the status - * file was changed while we are processing (no locking - * is currently done... - */ - if (statpkg != 0) { - statpkg = *(package_t **)statpkg; + /* Find this package in the status hashtable */ + status_num = search_status_hashtable(package_name); + if (status_hashtable[status_num] != NULL) { + const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status]; + if (strcmp(status_from_file, status_from_hashtable) != 0) { + /* New status isnt exactly the same as old status */ + const int state_status = get_status(status_num, 3); + if ((strcmp("installed", name_hashtable[state_status]) == 0) || + (strcmp("unpacked", name_hashtable[state_status]) == 0)) { + /* We need to add the control file from the package */ + i = 0; + while(deb_file[i] != NULL) { + if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) { + char *last_char; + /* Write a status file entry with a modified status */ + /* remove trailing \n's */ + while(1) { + last_char = last_char_is(deb_file[i]->control_file, '\n'); + if (last_char) { + *last_char = '\0'; + } else { + break; + } + } + fputs(deb_file[i]->control_file, new_status_file); + set_status(status_num, "ok", 2); + fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]); + write_flag = TRUE; + break; + } + i++; + } + /* This is temperary, debugging only */ + if (deb_file[i] == NULL) { + error_msg_and_die("ALERT: Couldnt find a control file, your status file may be broken, status may be incorrect for %s", package_name); + } + } + else if (strcmp("not-installed", name_hashtable[state_status]) == 0) { + /* Only write the Package, Status, Priority and Section lines */ + fprintf(new_status_file, "Package: %s\n", package_name); + fprintf(new_status_file, "Status: %s\n", status_from_hashtable); + buffer_length = strlen(control_buffer); + while (field_start < buffer_length) { + field = read_package_field(&control_buffer[field_start]); + field_length = strlen(field); + field_start += (field_length + 1); + if (strncmp(field, "Priority:", 9) == 0) { + fprintf(new_status_file, "Priority:%s\n", field + 9); + } + if (strncmp(field, "Section:", 8) == 0) { + fprintf(new_status_file, "Section:%s\n", field + 8); + } + } + write_flag = TRUE; + fputs("\n", new_status_file); + } + else if (strcmp("config-files", name_hashtable[state_status]) == 0) { + /* only change the status line */ + buffer_length = strlen(control_buffer); + while (field_start < buffer_length) { + field = read_package_field(&control_buffer[field_start]); + /* Setup start point for next field */ + field_length = strlen(field); + field_start += (field_length + 1); + if (strncmp(field, "Status:", 7) == 0) { + fprintf(new_status_file, "Status: %s\n", status_from_hashtable); + } else { + fprintf(new_status_file, "%s\n", field); + } + free(field); + } + write_flag = TRUE; + fputs("\n", new_status_file); } } - if (pkg != 0) { - continue; - } - if (strstr(line, "Status: ") == line && statpkg != 0) { - snprintf(line, sizeof(line), "Status: %s %s %s", - state_words_want[statpkg->state_want - 1], - state_words_flag[statpkg->state_flag - 1], - state_words_status[statpkg->state_status - 1]); + } + + /* If the package from the status file wasnt handle above, do it now*/ + if (write_flag == FALSE) { + fprintf(new_status_file, "%s\n\n", control_buffer); + } + + if (status_from_file != NULL) { + free(status_from_file); + } + free(package_name); + free(control_buffer); + } + /* Write any new packages */ + for(i = 0; deb_file[i] != NULL; i++) { + status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]); + if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) { + char *last_char; + /* remove trailing \n's */ + while(1) { + last_char = last_char_is(deb_file[i]->control_file, '\n'); + if (last_char) { + *last_char = '\0'; + } else { + break; + } } - fprintf(fout, "%s\n", line); + + fputs(deb_file[i]->control_file, new_status_file); + set_status(status_num, "ok", 2); + fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]); } - fclose(fin); } - free(line); + fclose(old_status_file); + fclose(new_status_file); - // Print out packages we processed. - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - write_package(fout, pkg); - } - fclose(fout); - /* - * Its ok if renaming statusfile fails becasue it doesnt exist - */ - if (rename(statusfile, bak_statusfile) == -1) { + /* Create a seperate backfile to dpkg */ + if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) { struct stat stat_buf; - if (stat(statusfile, &stat_buf) == 0) { - error_msg("Couldnt create backup status file"); - return(EXIT_FAILURE); + if (stat("/var/lib/dpkg/status", &stat_buf) == 0) { + error_msg_and_die("Couldnt create backup status file"); } + /* Its ok if renaming the status file fails becasue status + * file doesnt exist, maybe we are starting from scratch */ error_msg("No status file found, creating new one"); } - if (rename(new_statusfile, statusfile) == -1) { - error_msg("Couldnt create status file"); - return(EXIT_FAILURE); + if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) { + error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file"); } - return(EXIT_SUCCESS); } -static int is_file(const char *fn) +int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count) { - struct stat statbuf; + int *conflicts = NULL; + int conflicts_num = 0; + int state_status; + int state_flag; + int state_want; + unsigned int status_package_num; + int i = deb_start; + int j, k; + + /* Check for conflicts + * TODO: TEST if conflicts with other packages to be installed + * + * Add install packages and the packages they provide + * to the list of files to check conflicts for + */ - if (stat(fn, &statbuf) < 0) { - return 0; + /* Create array of package numbers to check against + * installed package for conflicts*/ + while (deb_file[i] != NULL) { + const unsigned int package_num = deb_file[i]->package; + conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1)); + conflicts[conflicts_num] = package_num; + conflicts_num++; + /* add provides to conflicts list */ + for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) { + if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) { + const int conflicts_package_num = search_package_hashtable( + package_hashtable[package_num]->edge[j]->name, + package_hashtable[package_num]->edge[j]->version, + package_hashtable[package_num]->edge[j]->operator); + if (package_hashtable[conflicts_package_num] == NULL) { + /* create a new package */ + common_node_t *new_node = (common_node_t *) xmalloc(sizeof(common_node_t)); + new_node->name = package_hashtable[package_num]->edge[j]->name; + new_node->version = package_hashtable[package_num]->edge[j]->version; + new_node->num_of_edges = 0; + new_node->edge = NULL; + package_hashtable[conflicts_package_num] = new_node; + } + conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1)); + conflicts[conflicts_num] = conflicts_package_num; + conflicts_num++; + } + } + i++; } - return S_ISREG(statbuf.st_mode); + + /* Check conflicts */ + for (i = 0; i < conflicts_num; i++) { + /* Check for conflicts */ + for (j = 0; j < STATUS_HASH_PRIME; j++) { + if (status_hashtable[j] == NULL) { + continue; + } + state_flag = get_status(j, 2); + state_status = get_status(j, 3); + if ((state_status != search_name_hashtable("installed")) + && (state_flag != search_name_hashtable("want-install"))) { + continue; + } + status_package_num = status_hashtable[j]->package; + for (k = 0; k < package_hashtable[status_package_num]->num_of_edges; k++) { + const edge_t *package_edge = package_hashtable[status_package_num]->edge[k]; + if (package_edge->type != EDGE_CONFLICTS) { + continue; + } + if (package_edge->name != package_hashtable[conflicts[i]]->name) { + continue; + } + /* There is a conflict against the package name + * check if version conflict as well */ + if (test_version(package_hashtable[deb_file[i]->package]->version, + package_edge->version, package_edge->operator)) { + error_msg_and_die("Package %s conflict with %s", + name_hashtable[package_hashtable[deb_file[i]->package]->name], + name_hashtable[package_hashtable[status_package_num]->name]); + } + } + } + } + + /* Check dependendcies */ + i = 0; + while (deb_file[i] != NULL) { + const common_node_t *package_node = package_hashtable[deb_file[i]->package]; + int status_num = 0; + + for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) { + const edge_t *package_edge = package_node->edge[j]; + const unsigned int package_num = search_package_hashtable(package_edge->name, + package_edge->version, package_edge->operator); + + status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]); + state_status = get_status(status_num, 3); + state_want = get_status(status_num, 1); + switch (package_edge->type) { + case(EDGE_PRE_DEPENDS): + case(EDGE_OR_PRE_DEPENDS): + /* It must be already installed */ + /* NOTE: This is untested, nothing apropriate in my status file */ + if ((package_hashtable[package_num] == NULL) || (state_status != search_name_hashtable("installed"))) { + error_msg_and_die("Package %s pre-depends on %s, but it is not installed", + name_hashtable[package_node->name], + name_hashtable[package_edge->name]); + } + break; + case(EDGE_DEPENDS): + case(EDGE_OR_DEPENDS): + /* It must be already installed, or to be installed */ + if ((package_hashtable[package_num] == NULL) || + ((state_status != search_name_hashtable("installed")) && + (state_want != search_name_hashtable("want_install")))) { + error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed", + name_hashtable[package_node->name], + name_hashtable[package_edge->name]); + } + break; + } + } + i++; + } + return(TRUE); } -static int dpkg_doconfigure(package_t *pkg) +char **create_list(const char *filename) { - int r; - char postinst[1024]; - char buf[1024]; - - DPRINTF("Configuring %s\n", pkg->package); - pkg->state_status = 0; - snprintf(postinst, sizeof(postinst), "%s%s.postinst", infodir, pkg->package); + FILE *list_stream; + char **file_list = xmalloc(sizeof(char *)); + char *line = NULL; + char *last_char; + int length = 0; + int count = 0; - if (is_file(postinst)) { - snprintf(buf, sizeof(buf), "%s configure", postinst); - if ((r = do_system(buf)) != 0) { - error_msg("postinst exited with status %d\n", r); - pkg->state_status = state_status_halfconfigured; - return 1; + list_stream = fopen(filename, "r"); + if (list_stream == NULL) { + return(NULL); + } + while (getline(&line, &length, list_stream) != -1) { + file_list = xrealloc(file_list, sizeof(char *) * (length + 1)); + last_char = last_char_is(line, '\n'); + if (last_char) { + *last_char = '\0'; } + file_list[count] = xstrdup(line); + free(line); + count++; + length = 0; + } + fclose(list_stream); + if (count == 0) { + return(NULL); + } else { + file_list[count] = NULL; + return(file_list); } - pkg->state_status = state_status_installed; - - return 0; } -static int dpkg_dounpack(package_t *pkg) +/* maybe i should try and hook this into remove_file.c somehow */ +int remove_file_array(char **remove_names, char **exclude_names) { - FILE *out_stream; - char *info_prefix; - int status = TRUE; - int r = 0; - - DPRINTF("Unpacking %s\n", pkg->package); + struct stat path_stat; + int match_flag; + int remove_flag = FALSE; + int i,j; - /* extract the data file */ - deb_extract(pkg->filename, stdout, (extract_data_tar_gz | extract_all_to_fs), "/", NULL); + if (remove_names == NULL) { + return(FALSE); + } + for (i = 0; remove_names[i] != NULL; i++) { + match_flag = FALSE; + if (exclude_names != NULL) { + for (j = 0; exclude_names[j] != 0; j++) { + if (strcmp(remove_names[i], exclude_names[j]) == 0) { + match_flag = TRUE; + break; + } + } + } + if (!match_flag) { + if (lstat(remove_names[i], &path_stat) < 0) { + continue; + } + if (S_ISDIR(path_stat.st_mode)) { + if (rmdir(remove_names[i]) != -1) { + remove_flag = TRUE; + } + } else { + if (unlink(remove_names[i]) != -1) { + remove_flag = TRUE; + } + } + } + } + return(remove_flag); +} - /* extract the control files */ - info_prefix = (char *) malloc(strlen(pkg->package) + strlen(infodir) + 2 + 5 + 1); - sprintf(info_prefix, "%s/%s.", infodir, pkg->package); - deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL); +int run_package_script(const char *package_name, const char *script_type) +{ + struct stat path_stat; + char *script_path; - /* Create the list file */ - strcat(info_prefix, "list"); - out_stream = wfopen(info_prefix, "w"); - deb_extract(pkg->filename, out_stream, (extract_data_tar_gz | extract_list), NULL, NULL); - fclose(out_stream); + script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21); + sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type); - pkg->state_want = state_want_install; - pkg->state_flag = state_flag_ok; - - if (status == TRUE) { - pkg->state_status = state_status_unpacked; + /* If the file doesnt exist is isnt a fatal */ + if (lstat(script_path, &path_stat) < 0) { + return(EXIT_SUCCESS); } else { - pkg->state_status = state_status_halfinstalled; + return(system(script_path)); } - - return r; } -/* - * Extract and parse the control file from control.tar.gz - */ -static int dpkg_read_control(package_t *pkg) +void all_control_list(char **remove_files, const char *package_name) { - FILE *pkg_file; - char *control_buffer = NULL; + const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm", + "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL }; + int i; - if ((pkg_file = wfopen(pkg->filename, "r")) == NULL) { - return EXIT_FAILURE; + /* Create a list of all /var/lib/dpkg/info/<package> files */ + for(i = 0; i < 10; i++) { + remove_files[i] = xmalloc(strlen(package_name) + strlen(all_extensions[i]) + 21); + sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, all_extensions[i]); } - control_buffer = deb_extract(pkg->filename, stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control"); - fill_package_struct(pkg, control_buffer); - return EXIT_SUCCESS; + remove_files[10] = NULL; } -static int dpkg_unpack(package_t *pkgs, void *status) +void remove_package(const unsigned int package_num) { - int r = 0; - package_t *pkg; - - for (pkg = pkgs; pkg != 0; pkg = pkg->next) { - dpkg_read_control(pkg); - if ((r = dpkg_dounpack(pkg)) != 0 ) { - break; - } + const char *package_name = name_hashtable[package_hashtable[package_num]->name]; + const unsigned int status_num = search_status_hashtable(package_name); + const int package_name_length = strlen(package_name); + char **remove_files; + char **exclude_files; + char list_name[package_name_length + 25]; + char conffile_name[package_name_length + 30]; + int return_value; + + /* run prerm script */ + return_value = run_package_script(package_name, "prem"); + if (return_value == -1) { + error_msg_and_die("script failed, prerm failure"); } - status_merge(status, pkgs); - return r; -} + /* Create a list of files to remove, and a seperate list of those to keep */ + sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name); + remove_files = create_list(list_name); -static int dpkg_configure(package_t *pkgs, void *status) -{ - int r = 0; - void *found; - package_t *pkg; + sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name); + exclude_files = create_list(conffile_name); - for (pkg = pkgs; pkg != 0 && r == 0; pkg = pkg->next) { - found = tfind(pkg, &status, package_compare); + /* Some directories cant be removed straight away, so do multiple passes */ + while (remove_file_array(remove_files, exclude_files) == TRUE); - if (found == 0) { - error_msg("Trying to configure %s, but it is not installed", pkg->package); - r = 1; - } - /* configure the package listed in the status file; - * not pkg, as we have info only for the latter - */ - else { - r = dpkg_doconfigure(*(package_t **)found); - } - } - status_merge(status, 0); + /* Create a list of all /var/lib/dpkg/info/<package> files */ + remove_files = xmalloc(11); + all_control_list(remove_files, package_name); - return r; + /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */ + exclude_files = xmalloc(sizeof(char*) * 3); + exclude_files[0] = xstrdup(conffile_name); + exclude_files[1] = xmalloc(package_name_length + 27); + sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name); + exclude_files[2] = NULL; + + remove_file_array(remove_files, exclude_files); + + /* rename <package>.conffile to <package>.list */ + rename(conffile_name, list_name); + + /* Change package status */ + set_status(status_num, "deinstall", 1); + set_status(status_num, "config-files", 3); } -static int dpkg_install(package_t *pkgs, void *status) +void purge_package(const unsigned int package_num) { - package_t *p, *ordered = 0; - - /* Stage 1: parse all the control information */ - for (p = pkgs; p != 0; p = p->next) { - dpkg_read_control(p); + const char *package_name = name_hashtable[package_hashtable[package_num]->name]; + const unsigned int status_num = search_status_hashtable(package_name); + char **remove_files; + char **exclude_files; + char list_name[strlen(package_name) + 25]; + + /* run prerm script */ + if (run_package_script(package_name, "prerm") == -1) { + error_msg_and_die("script failed, prerm failure"); } - /* Stage 2: resolve dependencies */ -#ifdef DODEPENDS - ordered = depends_resolve(pkgs, status); -#else - ordered = pkgs; -#endif - - /* Stage 3: install */ - for (p = ordered; p != 0; p = p->next) { - p->state_want = state_want_install; + /* Create a list of files to remove */ + sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name); + remove_files = create_list(list_name); - /* for now the flag is always set to ok... this is probably - * not what we want - */ - p->state_flag = state_flag_ok; + exclude_files = xmalloc(1); + exclude_files[0] = NULL; - DPRINTF("Installing %s\n", p->package); - if (dpkg_dounpack(p) != 0) { - perror_msg(p->filename); - } + /* Some directories cant be removed straight away, so do multiple passes */ + while (remove_file_array(remove_files, exclude_files) == TRUE); - if (dpkg_doconfigure(p) != 0) { - perror_msg(p->filename); - } + /* Create a list of all /var/lib/dpkg/info/<package> files */ + remove_files = xmalloc(11); + all_control_list(remove_files, package_name); + remove_file_array(remove_files, exclude_files); + + /* run postrm script */ + if (run_package_script(package_name, "postrm") == -1) { + error_msg_and_die("postrm fialure.. set status to what?"); } + /* Change package status */ + set_status(status_num, "purge", 1); + set_status(status_num, "not-installed", 3); +} + +void unpack_package(deb_file_t *deb_file) +{ + const unsigned int package_name_num = package_hashtable[deb_file->package]->name; + const char *package_name = name_hashtable[package_name_num]; + const unsigned int status_num = search_status_hashtable(package_name); + unsigned int status_package_num; - if (ordered != 0) { - status_merge(status, pkgs); + FILE *out_stream; + char *info_prefix; + + /* If existing version, remove it first */ + if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) { + /* Package is already installed, remove old version first */ + printf("Preparing to replace %s %s (using %s) ...\n", package_name, + name_hashtable[package_hashtable[status_package_num]->version], + deb_file->filename); + remove_package(status_package_num); + } else { + printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename); } - return 0; + /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */ + info_prefix = (char *) xmalloc(sizeof(package_name) + 20 + 4 + 1); + sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name); + deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL); + + /* Extract data.tar.gz to the root directory */ + deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs), "/", NULL); + + /* Create the list file */ + strcat(info_prefix, "list"); + + out_stream = wfopen(info_prefix, "w"); + deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), NULL, NULL); + fclose(out_stream); + + /* change status */ + set_status(status_num, "install", 1); + set_status(status_num, "unpacked", 3); } -/* - * Not implemented yet - * -static int dpkg_remove(package_t *pkgs, void *status) +void configure_package(deb_file_t *deb_file) { - package_t *p; - - for (p = pkgs; p != 0; p = p->next) - { + int return_value; + int status_num; + + /* Run the preinst prior to extracting */ + return_value = run_package_script(name_hashtable[package_hashtable[deb_file->package]->name], "postinst"); + if (return_value == -1) { + /* TODO: handle failure gracefully */ + error_msg_and_die("postrm fialure.. set status to what?"); } - status_merge(status, 0); - return 0; + /* Change status to reflect success */ + status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file->package]->name]); + set_status(status_num, "install", 1); + set_status(status_num, "installed", 3); } -*/ extern int dpkg_main(int argc, char **argv) { - const int arg_install = 1; - const int arg_unpack = 2; - const int arg_configure = 4; - - package_t *p, *packages = NULL; - void *status = NULL; - int opt = 0; - int optflag = 0; + deb_file_t **deb_file = NULL; + status_node_t *status_node; + char opt = 0; + int package_num; + int dpkg_opt = 0; + int deb_count = 0; + int state_status; + int status_num; + int i; - while ((opt = getopt(argc, argv, "iruc")) != -1) { + while ((opt = getopt(argc, argv, "cF:ilPru")) != -1) { switch (opt) { + case 'c': + dpkg_opt |= dpkg_opt_configure; + dpkg_opt |= dpkg_opt_package_name; + break; + case 'F': // equivalent to --force in official dpkg + if (strcmp(optarg, "depends") == 0) { + dpkg_opt |= dpkg_opt_force_ignore_depends; + } case 'i': - optflag |= arg_install; + dpkg_opt |= dpkg_opt_install; + dpkg_opt |= dpkg_opt_filename; break; - case 'u': - optflag |= arg_unpack; + case 'l': + dpkg_opt |= dpkg_opt_list_installed; + case 'P': + dpkg_opt |= dpkg_opt_purge; + dpkg_opt |= dpkg_opt_package_name; break; - case 'c': - optflag |= arg_configure; + case 'r': + dpkg_opt |= dpkg_opt_remove; + dpkg_opt |= dpkg_opt_package_name; + break; + case 'u': /* Equivalent to --unpack in official dpkg */ + dpkg_opt |= dpkg_opt_unpack; + dpkg_opt |= dpkg_opt_filename; break; default: show_usage(); } } + if ((argc == optind) || (dpkg_opt == 0)) { + show_usage(); + } + + puts("(Reading database ... xxxxx files and directories installed.)"); + index_status_file("/var/lib/dpkg/status"); + + /* Read arguments and store relevant info in structs */ + deb_file = xmalloc(sizeof(deb_file_t)); while (optind < argc) { - p = (package_t *) xcalloc(1, sizeof(package_t)); - if (optflag & arg_configure) { - p->package = xstrdup(argv[optind]); - } else { - p->filename = xstrdup(argv[optind]); + deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t)); + if (dpkg_opt & dpkg_opt_filename) { + deb_file[deb_count]->filename = xstrdup(argv[optind]); + deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control"); + if (deb_file[deb_count]->control_file == NULL) { + error_msg_and_die("Couldnt extract control file"); + } + package_num = fill_package_struct(deb_file[deb_count]->control_file); + + if (package_num == -1) { + error_msg("Invalid control file in %s", argv[optind]); + continue; + } + deb_file[deb_count]->package = (unsigned int) package_num; + /* Add the package to the status hashtable */ + if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) { + status_node = (status_node_t *) xmalloc(sizeof(status_node_t)); + status_node->package = deb_file[deb_count]->package; + /* use reinstreq isnt changed to "ok" until the package control info + * is written to the status file*/ + status_node->status = search_name_hashtable("install reinstreq not-installed"); + + status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); + status_hashtable[status_num] = status_node; + } } - p->next = packages; - packages = p; + else if (dpkg_opt & dpkg_opt_package_name) { + deb_file[deb_count]->filename = NULL; + deb_file[deb_count]->control_file = NULL; + deb_file[deb_count]->package = search_package_hashtable( + search_name_hashtable(argv[optind]), + search_name_hashtable("ANY"), VER_ANY); + if (package_hashtable[deb_file[deb_count]->package] == NULL) { + error_msg_and_die("unknown package, %s\n", argv[optind]); + } + state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3); + /* check package status is "installed" */ + if (dpkg_opt & dpkg_opt_remove) { + if ((strcmp(name_hashtable[state_status], "not-installed") == 0) || + (strcmp(name_hashtable[state_status], "config-files") == 0)) { + error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); + } + } + else if (dpkg_opt & dpkg_opt_purge) { + /* if package status is "conf-files" then its ok */ + if (strcmp(name_hashtable[state_status], "not-installed") == 0) { + error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); + } + } + } + deb_count++; optind++; } + deb_file[deb_count] = NULL; - make_directory((char *)infodir, S_IRWXU, FILEUTILS_RECUR); + /* Check that the deb file arguments are installable */ + /* TODO: check dependencies before removing */ + if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) { + if (!check_deps(deb_file, 0, deb_count)) { + error_msg_and_die("Dependency check fialed"); + } + } - status = status_read(); + for (i = 0; i < deb_count; i++) { + /* Remove or purge packages */ + if (dpkg_opt & dpkg_opt_remove) { + remove_package(deb_file[i]->package); + } + else if (dpkg_opt & dpkg_opt_purge) { + purge_package(deb_file[i]->package); + } + else if (dpkg_opt & dpkg_opt_unpack) { + unpack_package(deb_file[i]); + } + else if (dpkg_opt & dpkg_opt_install) { + unpack_package(deb_file[i]); + configure_package(deb_file[i]); + } + else if (dpkg_opt & dpkg_opt_configure) { + configure_package(deb_file[i]); + } + } - if (optflag & arg_install) { - return dpkg_install(packages, status); + write_status_file(deb_file); + + for (i = 0; i < NAME_HASH_PRIME; i++) { + if (name_hashtable[i] != NULL) { + free(name_hashtable[i]); + } } - else if (optflag & arg_unpack) { - return dpkg_unpack(packages, status); + for (i = 0; i < PACKAGE_HASH_PRIME; i++) { + free_package(package_hashtable[i]); } - else if (optflag & arg_configure) { - return dpkg_configure(packages, status); + for (i = 0; i < STATUS_HASH_PRIME; i++) { + if (status_hashtable[i] != NULL) { + free(status_hashtable[i]); + } } + return(EXIT_FAILURE); } + |