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authorEric Andersen2001-10-24 05:00:29 +0000
committerEric Andersen2001-10-24 05:00:29 +0000
commitbdfd0d78bc44e73d693510e70087857785b3b521 (patch)
tree153a573095afac8d8d0ea857759ecabd77fb28b7 /tar.c
parent9260fc5552a3ee52eb95823aa6689d52a1ffd33c (diff)
downloadbusybox-bdfd0d78bc44e73d693510e70087857785b3b521.zip
busybox-bdfd0d78bc44e73d693510e70087857785b3b521.tar.gz
Major rework of the directory structure and the entire build system.
-Erik
Diffstat (limited to 'tar.c')
-rw-r--r--tar.c745
1 files changed, 0 insertions, 745 deletions
diff --git a/tar.c b/tar.c
deleted file mode 100644
index f7a3da6..0000000
--- a/tar.c
+++ /dev/null
@@ -1,745 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Mini tar implementation for busybox
- *
- * Modifed to use common extraction code used by ar, cpio, dpkg-deb, dpkg
- * Glenn McGrath <bug1@optushome.com.au>
- *
- * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
- * ground up. It still has remnents of the old code lying about, but it is
- * very different now (i.e., cleaner, less global variables, etc.)
- *
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * Based in part in the tar implementation in sash
- * Copyright (c) 1999 by David I. Bell
- * Permission is granted to use, distribute, or modify this source,
- * provided that this copyright notice remains intact.
- * Permission to distribute sash derived code under the GPL has been granted.
- *
- * Based in part on the tar implementation from busybox-0.28
- * Copyright (C) 1995 Bruce Perens
- * This is free software under the GNU General Public License.
- *
- * 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
- * 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
- *
- */
-
-#include <fcntl.h>
-#include <getopt.h>
-#include <search.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fnmatch.h>
-#include <string.h>
-#include <errno.h>
-#include "busybox.h"
-
-#ifdef BB_FEATURE_TAR_CREATE
-
-/* Tar file constants */
-# define TAR_MAGIC "ustar" /* ustar and a null */
-# define TAR_VERSION " " /* Be compatable with GNU tar format */
-
-# ifndef MAJOR
-# define MAJOR(dev) (((dev)>>8)&0xff)
-# define MINOR(dev) ((dev)&0xff)
-# endif
-
-static const int TAR_BLOCK_SIZE = 512;
-static const int TAR_MAGIC_LEN = 6;
-static const int TAR_VERSION_LEN = 2;
-
-/* POSIX tar Header Block, from POSIX 1003.1-1990 */
-enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
-struct TarHeader
-{ /* byte offset */
- char name[NAME_SIZE]; /* 0-99 */
- char mode[8]; /* 100-107 */
- char uid[8]; /* 108-115 */
- char gid[8]; /* 116-123 */
- char size[12]; /* 124-135 */
- char mtime[12]; /* 136-147 */
- char chksum[8]; /* 148-155 */
- char typeflag; /* 156-156 */
- char linkname[NAME_SIZE]; /* 157-256 */
- char magic[6]; /* 257-262 */
- char version[2]; /* 263-264 */
- char uname[32]; /* 265-296 */
- char gname[32]; /* 297-328 */
- char devmajor[8]; /* 329-336 */
- char devminor[8]; /* 337-344 */
- char prefix[155]; /* 345-499 */
- char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
-};
-typedef struct TarHeader TarHeader;
-
-/*
-** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
-** the only functions that deal with the HardLinkInfo structure.
-** Even these functions use the xxxHardLinkInfo() functions.
-*/
-typedef struct HardLinkInfo HardLinkInfo;
-struct HardLinkInfo
-{
- HardLinkInfo *next; /* Next entry in list */
- dev_t dev; /* Device number */
- ino_t ino; /* Inode number */
- short linkCount; /* (Hard) Link Count */
- char name[1]; /* Start of filename (must be last) */
-};
-
-/* Some info to be carried along when creating a new tarball */
-struct TarBallInfo
-{
- char* fileName; /* File name of the tarball */
- int tarFd; /* Open-for-write file descriptor
- for the tarball */
- struct stat statBuf; /* Stat info for the tarball, letting
- us know the inode and device that the
- tarball lives, so we can avoid trying
- to include the tarball into itself */
- int verboseFlag; /* Whether to print extra stuff or not */
- char** excludeList; /* List of files to not include */
- HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
- HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
-};
-typedef struct TarBallInfo TarBallInfo;
-
-/* A nice enum with all the possible tar file content types */
-enum TarFileType
-{
- REGTYPE = '0', /* regular file */
- REGTYPE0 = '\0', /* regular file (ancient bug compat)*/
- LNKTYPE = '1', /* hard link */
- SYMTYPE = '2', /* symbolic link */
- CHRTYPE = '3', /* character special */
- BLKTYPE = '4', /* block special */
- DIRTYPE = '5', /* directory */
- FIFOTYPE = '6', /* FIFO special */
- CONTTYPE = '7', /* reserved */
- GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
- GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
-};
-typedef enum TarFileType TarFileType;
-
-/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
-static void
-addHardLinkInfo (HardLinkInfo **hlInfoHeadPtr, dev_t dev, ino_t ino,
- short linkCount, const char *name)
-{
- /* Note: hlInfoHeadPtr can never be NULL! */
- HardLinkInfo *hlInfo;
-
- hlInfo = (HardLinkInfo *)xmalloc(sizeof(HardLinkInfo)+strlen(name)+1);
- if (hlInfo) {
- hlInfo->next = *hlInfoHeadPtr;
- *hlInfoHeadPtr = hlInfo;
- hlInfo->dev = dev;
- hlInfo->ino = ino;
- hlInfo->linkCount = linkCount;
- strcpy(hlInfo->name, name);
- }
- return;
-}
-
-static void
-freeHardLinkInfo (HardLinkInfo **hlInfoHeadPtr)
-{
- HardLinkInfo *hlInfo = NULL;
- HardLinkInfo *hlInfoNext = NULL;
-
- if (hlInfoHeadPtr) {
- hlInfo = *hlInfoHeadPtr;
- while (hlInfo) {
- hlInfoNext = hlInfo->next;
- free(hlInfo);
- hlInfo = hlInfoNext;
- }
- *hlInfoHeadPtr = NULL;
- }
- return;
-}
-
-/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
-static HardLinkInfo *
-findHardLinkInfo (HardLinkInfo *hlInfo, dev_t dev, ino_t ino)
-{
- while(hlInfo) {
- if ((ino == hlInfo->ino) && (dev == hlInfo->dev))
- break;
- hlInfo = hlInfo->next;
- }
- return(hlInfo);
-}
-
-/* Put an octal string into the specified buffer.
- * The number is zero and space padded and possibly null padded.
- * Returns TRUE if successful. */
-static int putOctal (char *cp, int len, long value)
-{
- int tempLength;
- char tempBuffer[32];
- char *tempString = tempBuffer;
-
- /* Create a string of the specified length with an initial space,
- * leading zeroes and the octal number, and a trailing null. */
- sprintf (tempString, "%0*lo", len - 1, value);
-
- /* If the string is too large, suppress the leading space. */
- tempLength = strlen (tempString) + 1;
- if (tempLength > len) {
- tempLength--;
- tempString++;
- }
-
- /* If the string is still too large, suppress the trailing null. */
- if (tempLength > len)
- tempLength--;
-
- /* If the string is still too large, fail. */
- if (tempLength > len)
- return FALSE;
-
- /* Copy the string to the field. */
- memcpy (cp, tempString, len);
-
- return TRUE;
-}
-
-/* Write out a tar header for the specified file/directory/whatever */
-static int
-writeTarHeader(struct TarBallInfo *tbInfo, const char *header_name,
- const char *real_name, struct stat *statbuf)
-{
- long chksum=0;
- struct TarHeader header;
- const unsigned char *cp = (const unsigned char *) &header;
- ssize_t size = sizeof(struct TarHeader);
-
- memset( &header, 0, size);
-
- strncpy(header.name, header_name, sizeof(header.name));
-
- putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
- putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
- putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
- putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
- putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
- strncpy(header.magic, TAR_MAGIC TAR_VERSION,
- TAR_MAGIC_LEN + TAR_VERSION_LEN );
-
- /* Enter the user and group names (default to root if it fails) */
- my_getpwuid(header.uname, statbuf->st_uid);
- if (! *header.uname)
- strcpy(header.uname, "root");
- my_getgrgid(header.gname, statbuf->st_gid);
- if (! *header.uname)
- strcpy(header.uname, "root");
-
- if (tbInfo->hlInfo) {
- /* This is a hard link */
- header.typeflag = LNKTYPE;
- strncpy(header.linkname, tbInfo->hlInfo->name, sizeof(header.linkname));
- } else if (S_ISLNK(statbuf->st_mode)) {
- char *lpath = xreadlink(real_name);
- if (!lpath) /* Already printed err msg inside xreadlink() */
- return ( FALSE);
- header.typeflag = SYMTYPE;
- strncpy(header.linkname, lpath, sizeof(header.linkname));
- free(lpath);
- } else if (S_ISDIR(statbuf->st_mode)) {
- header.typeflag = DIRTYPE;
- strncat(header.name, "/", sizeof(header.name));
- } else if (S_ISCHR(statbuf->st_mode)) {
- header.typeflag = CHRTYPE;
- putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
- putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
- } else if (S_ISBLK(statbuf->st_mode)) {
- header.typeflag = BLKTYPE;
- putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
- putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
- } else if (S_ISFIFO(statbuf->st_mode)) {
- header.typeflag = FIFOTYPE;
- } else if (S_ISREG(statbuf->st_mode)) {
- header.typeflag = REGTYPE;
- putOctal(header.size, sizeof(header.size), statbuf->st_size);
- } else {
- error_msg("%s: Unknown file type", real_name);
- return ( FALSE);
- }
-
- /* Calculate and store the checksum (i.e., the sum of all of the bytes of
- * the header). The checksum field must be filled with blanks for the
- * calculation. The checksum field is formatted differently from the
- * other fields: it has [6] digits, a null, then a space -- rather than
- * digits, followed by a null like the other fields... */
- memset(header.chksum, ' ', sizeof(header.chksum));
- cp = (const unsigned char *) &header;
- while (size-- > 0)
- chksum += *cp++;
- putOctal(header.chksum, 7, chksum);
-
- /* Now write the header out to disk */
- if ((size=full_write(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
- error_msg(io_error, real_name, strerror(errno));
- return ( FALSE);
- }
- /* Pad the header up to the tar block size */
- for (; size<TAR_BLOCK_SIZE; size++) {
- write(tbInfo->tarFd, "\0", 1);
- }
- /* Now do the verbose thing (or not) */
- if (tbInfo->verboseFlag==TRUE) {
- FILE *vbFd = stdout;
- if (tbInfo->tarFd == fileno(stdout)) // If the archive goes to stdout, verbose to stderr
- vbFd = stderr;
- fprintf(vbFd, "%s\n", header.name);
- }
-
- return ( TRUE);
-}
-
-static int exclude_file(char **excluded_files, const char *file)
-{
- int i;
-
- if (excluded_files == NULL)
- return 0;
-
- for (i = 0; excluded_files[i] != NULL; i++) {
- if (excluded_files[i][0] == '/') {
- if (fnmatch(excluded_files[i], file,
- FNM_PATHNAME | FNM_LEADING_DIR) == 0)
- return 1;
- } else {
- const char *p;
-
- for (p = file; p[0] != '\0'; p++) {
- if ((p == file || p[-1] == '/') && p[0] != '/' &&
- fnmatch(excluded_files[i], p,
- FNM_PATHNAME | FNM_LEADING_DIR) == 0)
- return 1;
- }
- }
- }
-
- return 0;
-}
-
-static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
-{
- struct TarBallInfo *tbInfo = (struct TarBallInfo *)userData;
- const char *header_name;
-
- /*
- ** Check to see if we are dealing with a hard link.
- ** If so -
- ** Treat the first occurance of a given dev/inode as a file while
- ** treating any additional occurances as hard links. This is done
- ** by adding the file information to the HardLinkInfo linked list.
- */
- tbInfo->hlInfo = NULL;
- if (statbuf->st_nlink > 1) {
- tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf->st_dev,
- statbuf->st_ino);
- if (tbInfo->hlInfo == NULL)
- addHardLinkInfo (&tbInfo->hlInfoHead, statbuf->st_dev,
- statbuf->st_ino, statbuf->st_nlink, fileName);
- }
-
- /* It is against the rules to archive a socket */
- if (S_ISSOCK(statbuf->st_mode)) {
- error_msg("%s: socket ignored", fileName);
- return( TRUE);
- }
-
- /* It is a bad idea to store the archive we are in the process of creating,
- * so check the device and inode to be sure that this particular file isn't
- * the new tarball */
- if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
- tbInfo->statBuf.st_ino == statbuf->st_ino) {
- error_msg("%s: file is the archive; skipping", fileName);
- return( TRUE);
- }
-
- header_name = fileName;
- while (header_name[0] == '/') {
- static int alreadyWarned=FALSE;
- if (alreadyWarned==FALSE) {
- error_msg("Removing leading '/' from member names");
- alreadyWarned=TRUE;
- }
- header_name++;
- }
-
- if (strlen(fileName) >= NAME_SIZE) {
- error_msg(name_longer_than_foo, NAME_SIZE);
- return ( TRUE);
- }
-
- if (header_name[0] == '\0')
- return TRUE;
-
-# if defined BB_FEATURE_TAR_EXCLUDE
- if (exclude_file(tbInfo->excludeList, header_name)) {
- return SKIP;
- }
-# endif //BB_FEATURE_TAR_EXCLUDE
-
- if (writeTarHeader(tbInfo, header_name, fileName, statbuf)==FALSE) {
- return( FALSE);
- }
-
- /* Now, if the file is a regular file, copy it out to the tarball */
- if ((tbInfo->hlInfo == NULL)
- && (S_ISREG(statbuf->st_mode))) {
- int inputFileFd;
- char buffer[BUFSIZ];
- ssize_t size=0, readSize=0;
-
- /* open the file we want to archive, and make sure all is well */
- if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
- error_msg("%s: Cannot open: %s", fileName, strerror(errno));
- return( FALSE);
- }
-
- /* write the file to the archive */
- while ( (size = full_read(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
- if (full_write(tbInfo->tarFd, buffer, size) != size ) {
- /* Output file seems to have a problem */
- error_msg(io_error, fileName, strerror(errno));
- return( FALSE);
- }
- readSize+=size;
- }
- if (size == -1) {
- error_msg(io_error, fileName, strerror(errno));
- return( FALSE);
- }
- /* Pad the file up to the tar block size */
- for (; (readSize%TAR_BLOCK_SIZE) != 0; readSize++) {
- write(tbInfo->tarFd, "\0", 1);
- }
- close( inputFileFd);
- }
-
- return( TRUE);
-}
-
-static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
- char** excludeList)
-{
- int tarFd=-1;
- int errorFlag=FALSE;
- ssize_t size;
- struct TarBallInfo tbInfo;
- tbInfo.verboseFlag = verboseFlag;
- tbInfo.hlInfoHead = NULL;
-
- /* Make sure there is at least one file to tar up. */
- if (*argv == NULL)
- error_msg_and_die("Cowardly refusing to create an empty archive");
-
- /* Open the tar file for writing. */
- if (!strcmp(tarName, "-"))
- tbInfo.tarFd = fileno(stdout);
- else
- tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
- if (tbInfo.tarFd < 0) {
- perror_msg( "Error opening '%s'", tarName);
- freeHardLinkInfo(&tbInfo.hlInfoHead);
- return ( FALSE);
- }
- tbInfo.excludeList=excludeList;
- /* Store the stat info for the tarball's file, so
- * can avoid including the tarball into itself.... */
- if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
- error_msg_and_die(io_error, tarName, strerror(errno));
-
- /* Read the directory/files and iterate over them one at a time */
- while (*argv != NULL) {
- if (recursive_action(*argv++, TRUE, FALSE, FALSE,
- writeFileToTarball, writeFileToTarball,
- (void*) &tbInfo) == FALSE) {
- errorFlag = TRUE;
- }
- }
- /* Write two empty blocks to the end of the archive */
- for (size=0; size<(2*TAR_BLOCK_SIZE); size++) {
- write(tbInfo.tarFd, "\0", 1);
- }
-
- /* To be pedantically correct, we would check if the tarball
- * is smaller than 20 tar blocks, and pad it if it was smaller,
- * but that isn't necessary for GNU tar interoperability, and
- * so is considered a waste of space */
-
- /* Hang up the tools, close up shop, head home */
- close(tarFd);
- if (errorFlag == TRUE) {
- error_msg("Error exit delayed from previous errors");
- freeHardLinkInfo(&tbInfo.hlInfoHead);
- return(FALSE);
- }
- freeHardLinkInfo(&tbInfo.hlInfoHead);
- return( TRUE);
-}
-#endif //tar_create
-
-void append_file_to_list(const char *new_name, char ***list, int *list_count)
-{
- *list = realloc(*list, sizeof(char *) * (*list_count + 2));
- (*list)[*list_count] = xstrdup(new_name);
- (*list_count)++;
- (*list)[*list_count] = NULL;
-}
-
-void append_file_list_to_list(char *filename, char ***name_list, int *num_of_entries)
-{
- FILE *src_stream;
- char *line;
- char *line_ptr;
-
- src_stream = xfopen(filename, "r");
- while ((line = get_line_from_file(src_stream)) != NULL) {
- line_ptr = last_char_is(line, '\n');
- if (line_ptr) {
- *line_ptr = '\0';
- }
- append_file_to_list(line, name_list, num_of_entries);
- free(line);
- }
- fclose(src_stream);
-}
-
-#ifdef BB_FEATURE_TAR_EXCLUDE
-/*
- * Create a list of names that are in the include list AND NOT in the exclude lists
- */
-char **list_and_not_list(char **include_list, char **exclude_list)
-{
- char **new_include_list = NULL;
- int new_include_count = 0;
- int include_count = 0;
- int exclude_count;
-
- if (include_list == NULL) {
- return(NULL);
- }
-
- while (include_list[include_count] != NULL) {
- int found = FALSE;
- exclude_count = 0;
- while (exclude_list[exclude_count] != NULL) {
- if (strcmp(include_list[include_count], exclude_list[exclude_count]) == 0) {
- found = TRUE;
- break;
- }
- exclude_count++;
- }
-
- if (found == FALSE) {
- new_include_list = realloc(new_include_list, sizeof(char *) * (include_count + 2));
- new_include_list[new_include_count] = include_list[include_count];
- new_include_count++;
- } else {
- free(include_list[include_count]);
- }
- include_count++;
- }
- new_include_list[new_include_count] = NULL;
- return(new_include_list);
-}
-#endif
-
-int tar_main(int argc, char **argv)
-{
- enum untar_funct_e {
- /* These are optional */
- untar_from_file = 1,
- untar_from_stdin = 2,
- untar_unzip = 4,
- /* Require one and only one of these */
- untar_list = 8,
- untar_create = 16,
- untar_extract = 32
- };
-
- FILE *src_stream = NULL;
- FILE *uncompressed_stream = NULL;
- char **include_list = NULL;
- char **exclude_list = NULL;
- char *src_filename = NULL;
- char *dst_prefix = NULL;
- char *file_list_name = NULL;
- int opt;
- unsigned short untar_funct = 0;
- unsigned short untar_funct_required = 0;
- unsigned short extract_function = 0;
- int include_list_count = 0;
- int exclude_list_count = 0;
- int gunzip_pid;
- int gz_fd = 0;
-
- if (argc < 2) {
- show_usage();
- }
-
- /* Prepend '-' to the first argument if required */
- if (argv[1][0] != '-') {
- char *tmp = xmalloc(strlen(argv[1]) + 2);
- tmp[0] = '-';
- strcpy(tmp + 1, argv[1]);
- argv[1] = tmp;
- }
-
- while ((opt = getopt(argc, argv, "ctxT:X:C:f:Opvz")) != -1) {
- switch (opt) {
-
- /* One and only one of these is required */
- case 'c':
- untar_funct_required |= untar_create;
- break;
- case 't':
- untar_funct_required |= untar_list;
- extract_function |= extract_list |extract_unconditional;
- break;
- case 'x':
- untar_funct_required |= untar_extract;
- extract_function |= (extract_all_to_fs | extract_unconditional | extract_create_leading_dirs);
- break;
-
- /* These are optional */
- /* Exclude or Include files listed in <filename>*/
-#ifdef BB_FEATURE_TAR_EXCLUDE
- case 'X':
- append_file_list_to_list(optarg, &exclude_list, &exclude_list_count);
- break;
-#endif
- case 'T':
- // by default a list is an include list
- append_file_list_to_list(optarg, &include_list, &include_list_count);
- break;
-
- case 'C': // Change to dir <optarg>
- /* Make sure dst_prefix ends in a '/' */
- dst_prefix = concat_path_file(optarg, "/");
- break;
- case 'f': // archive filename
- if (strcmp(optarg, "-") == 0) {
- // Untar from stdin to stdout
- untar_funct |= untar_from_stdin;
- } else {
- untar_funct |= untar_from_file;
- src_filename = xstrdup(optarg);
- }
- break;
- case 'O':
- extract_function |= extract_to_stdout;
- break;
- case 'p':
- break;
- case 'v':
- if (extract_function & extract_list) {
- extract_function |= extract_verbose_list;
- }
- extract_function |= extract_list;
- break;
-#ifdef BB_FEATURE_TAR_GZIP
- case 'z':
- untar_funct |= untar_unzip;
- break;
-#endif
- default:
- show_usage();
- }
- }
-
- /* Make sure the valid arguments were passed */
- if (untar_funct_required == 0) {
- error_msg_and_die("You must specify one of the `-ctx' options");
- }
- if ((untar_funct_required != untar_create) &&
- (untar_funct_required != untar_extract) &&
- (untar_funct_required != untar_list)) {
- error_msg_and_die("You may not specify more than one `ctx' option.");
- }
- untar_funct |= untar_funct_required;
-
- /* Setup an array of filenames to work with */
- while (optind < argc) {
- append_file_to_list(argv[optind], &include_list, &include_list_count);
- optind++;
- }
-
- if (extract_function & (extract_list | extract_all_to_fs)) {
- if (dst_prefix == NULL) {
- dst_prefix = xstrdup("./");
- }
-
- /* Setup the source of the tar data */
- if (untar_funct & untar_from_file) {
- src_stream = xfopen(src_filename, "r");
- } else {
- src_stream = stdin;
- }
-#ifdef BB_FEATURE_TAR_GZIP
- /* Get a binary tree of all the tar file headers */
- if (untar_funct & untar_unzip) {
- uncompressed_stream = gz_open(src_stream, &gunzip_pid);
- } else
-#endif // BB_FEATURE_TAR_GZIP
- uncompressed_stream = src_stream;
-
- /* extract or list archive */
- unarchive(uncompressed_stream, stdout, &get_header_tar, extract_function, dst_prefix, include_list, exclude_list);
- fclose(uncompressed_stream);
- }
-#ifdef BB_FEATURE_TAR_CREATE
- /* create an archive */
- else if (untar_funct & untar_create) {
- int verboseFlag = FALSE;
-
-#ifdef BB_FEATURE_TAR_GZIP
- if (untar_funct && untar_unzip) {
- error_msg_and_die("Creation of compressed tarfile not internally support by tar, pipe to busybox gunzip");
- }
-#endif // BB_FEATURE_TAR_GZIP
- if (extract_function & extract_verbose_list) {
- verboseFlag = TRUE;
- }
- writeTarFile(src_filename, verboseFlag, &argv[argc - 1], include_list);
- }
-#endif // BB_FEATURE_TAR_CREATE
-
- /* Cleanups */
-#ifdef BB_FEATURE_TAR_GZIP
- if (untar_funct & untar_unzip) {
- fclose(src_stream);
- close(gz_fd);
- gz_close(gunzip_pid);
- }
-#endif // BB_FEATURE_TAR_GZIP
- if (src_filename) {
- free(src_filename);
- }
- if (file_list_name) {
- free(file_list_name);
- }
- return(EXIT_SUCCESS);
-}