Move libbb/unarchive functions to ./archival/libunarchive

1 files changed, 0 insertions, 627 deletions

diff --git a/libbb/unarchive.c b/libbb/unarchive.c
deleted file mode 100644
index 9c599a4..0000000
--- a/libbb/unarchive.c
+++ /dev/null
@@ -1,627 +0,0 @@
-/*
- *  Copyright (C) 2000 by Glenn McGrath
- *  Copyright (C) 2001 by Laurence Anderson
- *	
- *  Based on previous work by busybox developers and others.
- *
- *  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.
- */
-
-#include <stdio.h>
-#include <errno.h>
-#include <fnmatch.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <utime.h>
-#include "libbb.h"
-
-extern void seek_sub_file(FILE *src_stream, const int count);
-extern char *extract_archive(FILE *src_stream, FILE *out_stream, const file_header_t *file_entry,
- const int function, const char *prefix);
-
-
-#ifdef L_archive_offset
-off_t archive_offset;
-#else
-extern off_t archive_offset;
-#endif	
-
-#ifdef L_seek_sub_file
-void seek_sub_file(FILE *src_stream, const int count)
-{
-	int i;
-	/* Try to fseek as faster */
-	archive_offset += count;
-	if (fseek(src_stream, count, SEEK_CUR) != 0 && errno == ESPIPE) {
-	for (i = 0; i < count; i++) {
-		fgetc(src_stream);
-		}
-	}
-	return;
-}
-#endif	
-
-
-
-#ifdef L_extract_archive
-/* Extract the data postioned at src_stream to either filesystem, stdout or 
- * buffer depending on the value of 'function' which is defined in libbb.h 
- *
- * prefix doesnt have to be just a directory, it may prefix the filename as well.
- *
- * e.g. '/var/lib/dpkg/info/dpkg.' will extract all files to the base bath 
- * '/var/lib/dpkg/info/' and all files/dirs created in that dir will have 
- * 'dpkg.' as their prefix
- *
- * For this reason if prefix does point to a dir then it must end with a
- * trailing '/' or else the last dir will be assumed to be the file prefix 
- */
-char *extract_archive(FILE *src_stream, FILE *out_stream, const file_header_t *file_entry,
- const int function, const char *prefix)
-{
-	FILE *dst_stream = NULL;
-	char *full_name = NULL;
-	char *buffer = NULL;
-	struct utimbuf t;
-
-	/* prefix doesnt have to be a proper path it may prepend 
-	 * the filename as well */
-	if (prefix != NULL) {
-		/* strip leading '/' in filename to extract as prefix may not be dir */
-		/* Cant use concat_path_file here as prefix might not be a directory */
-		char *path = file_entry->name;
-		if (strncmp("./", path, 2) == 0) {
-			path += 2;
-			if (strlen(path) == 0) {
-				return(NULL);
-			}
-		}
-		full_name = xmalloc(strlen(prefix) + strlen(path) + 1);
-		strcpy(full_name, prefix);
-		strcat(full_name, path);
-	} else {
-		full_name = file_entry->name;
-	}
-	if (function & extract_to_stdout) {
-		if (S_ISREG(file_entry->mode)) {
-			copy_file_chunk(src_stream, out_stream, file_entry->size);			
-			archive_offset += file_entry->size;
-		}
-	}
-	else if (function & extract_one_to_buffer) { 
-		if (S_ISREG(file_entry->mode)) {
-			buffer = (char *) xmalloc(file_entry->size + 1);
-			fread(buffer, 1, file_entry->size, src_stream);
-			buffer[file_entry->size] = '\0';
-			archive_offset += file_entry->size;
-			return(buffer);
-		}
-	}
-	else if (function & extract_all_to_fs) {
-		struct stat oldfile;
-		int stat_res;
-		stat_res = lstat (full_name, &oldfile);
-		if (stat_res == 0) { /* The file already exists */
-			if ((function & extract_unconditional) || (oldfile.st_mtime < file_entry->mtime)) {
-				if (!S_ISDIR(oldfile.st_mode)) {
-					unlink(full_name); /* Directories might not be empty etc */
-				}
-			} else {
-				if ((function & extract_quiet) != extract_quiet) {
-					error_msg("%s not created: newer or same age file exists", file_entry->name);
-				}
-				seek_sub_file(src_stream, file_entry->size);
-				return (NULL);
-			}
-		}
-		if (function & extract_create_leading_dirs) { /* Create leading directories with default umask */
-			char *buf, *parent;
-			buf = xstrdup(full_name);
-			parent = dirname(buf);
-			if (make_directory (parent, -1, FILEUTILS_RECUR) != 0) {
-				if ((function & extract_quiet) != extract_quiet) {
-					error_msg("couldn't create leading directories");
-				}
-			}
-			free (buf);
-		}
-		switch(file_entry->mode & S_IFMT) {
-			case S_IFREG:
-				if (file_entry->link_name) { /* Found a cpio hard link */
-					if (link(file_entry->link_name, full_name) != 0) {
-						if ((function & extract_quiet) != extract_quiet) {
-							perror_msg("Cannot link from %s to '%s'",
-								file_entry->name, file_entry->link_name);
-						}
-					}
-				} else {
-					if ((dst_stream = wfopen(full_name, "w")) == NULL) {
-						seek_sub_file(src_stream, file_entry->size);
-						return NULL;
-					}
-					archive_offset += file_entry->size;
-					copy_file_chunk(src_stream, dst_stream, file_entry->size);			
-					fclose(dst_stream);
-				}
-				break;
-			case S_IFDIR:
-				if (stat_res != 0) {
-					if (mkdir(full_name, file_entry->mode) < 0) {
-						if ((function & extract_quiet) != extract_quiet) {
-							perror_msg("extract_archive: %s", full_name);
-						}
-					}
-				}
-				break;
-			case S_IFLNK:
-				if (symlink(file_entry->link_name, full_name) < 0) {
-					if ((function & extract_quiet) != extract_quiet) {
-						perror_msg("Cannot create symlink from %s to '%s'", file_entry->name, file_entry->link_name);
-					}
-					return NULL;
-				}
-				break;
-			case S_IFSOCK:
-			case S_IFBLK:
-			case S_IFCHR:
-			case S_IFIFO:
-				if (mknod(full_name, file_entry->mode, file_entry->device) == -1) {
-					if ((function & extract_quiet) != extract_quiet) {
-						perror_msg("Cannot create node %s", file_entry->name);
-					}
-					return NULL;
-				}
-				break;
-		}
-
-		/* Changing a symlink's properties normally changes the properties of the 
-		 * file pointed to, so dont try and change the date or mode, lchown does
-		 * does the right thing, but isnt available in older versions of libc */
-		if (S_ISLNK(file_entry->mode)) {
-#if (__GLIBC__ > 2) && (__GLIBC_MINOR__ > 1)
-			lchown(full_name, file_entry->uid, file_entry->gid);
-#endif
-		} else {
-			if (function & extract_preserve_date) {
-				t.actime = file_entry->mtime;
-				t.modtime = file_entry->mtime;
-				utime(full_name, &t);
-			}
-			chmod(full_name, file_entry->mode);
-			chown(full_name, file_entry->uid, file_entry->gid);
-		}
-	} else {
-		/* If we arent extracting data we have to skip it, 
-		 * if data size is 0 then then just do it anyway
-		 * (saves testing for it) */
-		seek_sub_file(src_stream, file_entry->size);
-	}
-
-	/* extract_list and extract_verbose_list can be used in conjunction
-	 * with one of the above four extraction functions, so do this seperately */
-	if (function & extract_verbose_list) {
-		fprintf(out_stream, "%s %d/%d %8d %s ", mode_string(file_entry->mode), 
-			file_entry->uid, file_entry->gid,
-			(int) file_entry->size, time_string(file_entry->mtime));
-	}
-	if ((function & extract_list) || (function & extract_verbose_list)){
-		/* fputs doesnt add a trailing \n, so use fprintf */
-		fprintf(out_stream, "%s\n", full_name);
-	}
-
-	free(full_name);
-
-	return(NULL); /* Maybe we should say if failed */
-}
-#endif
-
-#ifdef L_unarchive
-char *unarchive(FILE *src_stream, FILE *out_stream, file_header_t *(*get_headers)(FILE *),
-	const int extract_function, const char *prefix, char **include_name, char **exclude_name)
-{
-	file_header_t *file_entry;
-	int extract_flag = TRUE;
-	int i;
-	char *buffer = NULL;
-
-	archive_offset = 0;
-	while ((file_entry = get_headers(src_stream)) != NULL) {
-
-		if (include_name != NULL) {
-			extract_flag = FALSE;
-			for(i = 0; include_name[i] != 0; i++) {
-				if (fnmatch(include_name[i], file_entry->name, FNM_LEADING_DIR) == 0) {
-					extract_flag = TRUE;
-					break;
-				}
-			}
-		} else {
-			extract_flag = TRUE;
-		}
-
-		/* If the file entry is in the exclude list dont extract it */
-		if (exclude_name != NULL) {
-			for(i = 0; exclude_name[i] != 0; i++) {
-				if (fnmatch(exclude_name[i], file_entry->name, FNM_LEADING_DIR) == 0) {
-					extract_flag = FALSE;
-					break;
-				}
-			}
-		}
-
-		if (extract_flag == TRUE) {
-			buffer = extract_archive(src_stream, out_stream, file_entry, extract_function, prefix);
-		} else {
-			/* seek past the data entry */
-			seek_sub_file(src_stream, file_entry->size);
-		}
-		free(file_entry->name); /* may be null, but doesn't matter */
-		if (file_entry->link_name) {
-			free(file_entry->link_name);
-		}
-		free(file_entry);
-	}
-	return(buffer);
-}
-#endif
-
-#ifdef L_get_header_ar
-file_header_t *get_header_ar(FILE *src_stream)
-{
-	file_header_t *typed;
-	union {
-		char raw[60];
-	 	struct {
- 			char name[16];
- 			char date[12];
- 			char uid[6];
- 			char gid[6];
- 			char mode[8];
- 			char size[10];
- 			char magic[2];
- 		} formated;
-	} ar;
-	static char *ar_long_names;
-
-	if (fread(ar.raw, 1, 60, src_stream) != 60) {
-		return(NULL);
-	}
-	archive_offset += 60;
-	/* align the headers based on the header magic */
-	if ((ar.formated.magic[0] != '`') || (ar.formated.magic[1] != '\n')) {
-		/* some version of ar, have an extra '\n' after each data entry,
-		 * this puts the next header out by 1 */
-		if (ar.formated.magic[1] != '`') {
-			error_msg("Invalid magic");
-			return(NULL);
-		}
-		/* read the next char out of what would be the data section,
-		 * if its a '\n' then it is a valid header offset by 1*/
-		archive_offset++;
-		if (fgetc(src_stream) != '\n') {
-			error_msg("Invalid magic");
-			return(NULL);
-		}
-		/* fix up the header, we started reading 1 byte too early */
-		/* raw_header[60] wont be '\n' as it should, but it doesnt matter */
-		memmove(ar.raw, &ar.raw[1], 59);
-	}
-		
-	typed = (file_header_t *) xcalloc(1, sizeof(file_header_t));
-
-	typed->size = (size_t) atoi(ar.formated.size);
-	/* long filenames have '/' as the first character */
-	if (ar.formated.name[0] == '/') {
-		if (ar.formated.name[1] == '/') {
-			/* If the second char is a '/' then this entries data section
-			 * stores long filename for multiple entries, they are stored
-			 * in static variable long_names for use in future entries */
-			ar_long_names = (char *) xrealloc(ar_long_names, typed->size);
-			fread(ar_long_names, 1, typed->size, src_stream);
-			archive_offset += typed->size;
-			/* This ar entries data section only contained filenames for other records
-			 * they are stored in the static ar_long_names for future reference */
-			return (get_header_ar(src_stream)); /* Return next header */
-		} else if (ar.formated.name[1] == ' ') {
-			/* This is the index of symbols in the file for compilers */
-			seek_sub_file(src_stream, typed->size);
-			return (get_header_ar(src_stream)); /* Return next header */
-		} else {
-			/* The number after the '/' indicates the offset in the ar data section
-			(saved in variable long_name) that conatains the real filename */
-			if (!ar_long_names) {
-				error_msg("Cannot resolve long file name");
-				return (NULL);
-			}
-			typed->name = xstrdup(ar_long_names + atoi(&ar.formated.name[1]));
-		}
-	} else {
-		/* short filenames */
-		typed->name = xcalloc(1, 16);
-		strncpy(typed->name, ar.formated.name, 16);
-	}
-	typed->name[strcspn(typed->name, " /")]='\0';
-
-	/* convert the rest of the now valid char header to its typed struct */	
-	parse_mode(ar.formated.mode, &typed->mode);
-	typed->mtime = atoi(ar.formated.date);
-	typed->uid = atoi(ar.formated.uid);
-	typed->gid = atoi(ar.formated.gid);
-
-	return(typed);
-}
-#endif
-
-#ifdef L_get_header_cpio
-struct hardlinks {
-	file_header_t *entry;
-	int inode;
-	struct hardlinks *next;
-};
-
-file_header_t *get_header_cpio(FILE *src_stream)
-{
-	file_header_t *cpio_entry = NULL;
-	char cpio_header[110];
-	int namesize;
- 	char dummy[16];
- 	int major, minor, nlink, inode;
- 	static struct hardlinks *saved_hardlinks = NULL;
- 	static int pending_hardlinks = 0;
-
-	if (pending_hardlinks) { /* Deal with any pending hardlinks */
-		struct hardlinks *tmp = saved_hardlinks, *oldtmp = NULL;
-		while (tmp) {
-			if (tmp->entry->link_name) { /* Found a hardlink ready to be extracted */
-				cpio_entry = tmp->entry;
-				if (oldtmp) oldtmp->next = tmp->next; /* Remove item from linked list */
-				else saved_hardlinks = tmp->next;
-				free(tmp);
-				return (cpio_entry);
-			}
-			oldtmp = tmp;
-			tmp = tmp->next;
-		}
-		pending_hardlinks = 0; /* No more pending hardlinks, read next file entry */
-	}
-  
-	/* There can be padding before archive header */
-	seek_sub_file(src_stream, (4 - (archive_offset % 4)) % 4);
-	if (fread(cpio_header, 1, 110, src_stream) == 110) {
-		archive_offset += 110;
-		if (strncmp(cpio_header, "07070", 5) != 0) {
-			error_msg("Unsupported format or invalid magic");
-			return(NULL);
-		}
-		switch (cpio_header[5]) {
-			case '2': /* "crc" header format */
-				/* Doesnt do the crc check yet */
-			case '1': /* "newc" header format */
-				cpio_entry = (file_header_t *) xcalloc(1, sizeof(file_header_t));
-				sscanf(cpio_header, "%6c%8x%8x%8x%8x%8x%8lx%8lx%16c%8x%8x%8x%8c",
-					dummy, &inode, (unsigned int*)&cpio_entry->mode, 
-					(unsigned int*)&cpio_entry->uid, (unsigned int*)&cpio_entry->gid,
-					&nlink, &cpio_entry->mtime, &cpio_entry->size,
-					dummy, &major, &minor, &namesize, dummy);
-
-				cpio_entry->name = (char *) xcalloc(1, namesize);
-				fread(cpio_entry->name, 1, namesize, src_stream); /* Read in filename */
-				archive_offset += namesize;
-				/* Skip padding before file contents */
-				seek_sub_file(src_stream, (4 - (archive_offset % 4)) % 4);
-				if (strcmp(cpio_entry->name, "TRAILER!!!") == 0) {
-					printf("%d blocks\n", (int) (archive_offset % 512 ? (archive_offset / 512) + 1 : archive_offset / 512)); /* Always round up */
-					if (saved_hardlinks) { /* Bummer - we still have unresolved hardlinks */
-						struct hardlinks *tmp = saved_hardlinks, *oldtmp = NULL;
-						while (tmp) {
-							error_msg("%s not created: cannot resolve hardlink", tmp->entry->name);
-							oldtmp = tmp;
-							tmp = tmp->next;
-							free (oldtmp->entry->name);
-							free (oldtmp->entry);
-							free (oldtmp);
-						}
-						saved_hardlinks = NULL;
-						pending_hardlinks = 0;
-					}
-					return(NULL);
-				}
-
-				if (S_ISLNK(cpio_entry->mode)) {
-					cpio_entry->link_name = (char *) xcalloc(1, cpio_entry->size + 1);
-					fread(cpio_entry->link_name, 1, cpio_entry->size, src_stream);
-					archive_offset += cpio_entry->size;
-					cpio_entry->size = 0; /* Stop possiable seeks in future */
-				}
-				if (nlink > 1 && !S_ISDIR(cpio_entry->mode)) {
-					if (cpio_entry->size == 0) { /* Put file on a linked list for later */
-						struct hardlinks *new = xmalloc(sizeof(struct hardlinks));
-						new->next = saved_hardlinks;
-						new->inode = inode;
-						new->entry = cpio_entry;
-						saved_hardlinks = new;
-					return(get_header_cpio(src_stream)); /* Recurse to next file */
-					} else { /* Found the file with data in */
-						struct hardlinks *tmp = saved_hardlinks;
-						pending_hardlinks = 1;
-						while (tmp) {
-							if (tmp->inode == inode) {
-								tmp->entry->link_name = xstrdup(cpio_entry->name);
-								nlink--;
-							}
-							tmp = tmp->next;
-						}
-						if (nlink > 1) error_msg("error resolving hardlink: did you create the archive with GNU cpio 2.0-2.2?");
-					}
-				}
-				cpio_entry->device = (major << 8) | minor;
-				break;
-			default:
-				error_msg("Unsupported format");
-				return(NULL);
-		}
-		if (ferror(src_stream) || feof(src_stream)) {
-			perror_msg("Stream error");
-			return(NULL);
-		}
-	}
-	return(cpio_entry);
-}
-#endif
-
-#ifdef L_get_header_tar
-file_header_t *get_header_tar(FILE *tar_stream)
-{
-	union {
-		unsigned char raw[512];
-		struct {
-			char name[100];		/*   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[100];	/* 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 */
-		} formated;
-	} tar;
-	file_header_t *tar_entry = NULL;
-	long sum = 0;
-	long i;
-
-	if (archive_offset % 512 != 0) {
-		seek_sub_file(tar_stream, 512 - (archive_offset % 512));
-	}
-
-	if (fread(tar.raw, 1, 512, tar_stream) != 512) {
-		/* Unfortunatly its common for tar files to have all sorts of
-		 * trailing garbage, fail silently */
-//		error_msg("Couldnt read header");
-		return(NULL);
-	}
-	archive_offset += 512;
-
-	/* Check header has valid magic, unfortunately some tar files
-	 * have empty (0'ed) tar entries at the end, which will
-	 * cause this to fail, so fail silently for now
-	 */
-	if (strncmp(tar.formated.magic, "ustar", 5) != 0) {
-		return(NULL);
-	}
-
-	/* Do checksum on headers */
-	for (i =  0; i < 148 ; i++) {
-		sum += tar.raw[i];
-	}
-	sum += ' ' * 8;
-	for (i =  156; i < 512 ; i++) {
-		sum += tar.raw[i];
-	}
-	if (sum != strtol(tar.formated.chksum, NULL, 8)) {
-		error_msg("Invalid tar header checksum");
-		return(NULL);
-	}
-
-	/* convert to type'ed variables */
-	tar_entry = xcalloc(1, sizeof(file_header_t));
-	tar_entry->name = xstrdup(tar.formated.name);
-
-	parse_mode(tar.formated.mode, &tar_entry->mode);
-	tar_entry->uid   = strtol(tar.formated.uid, NULL, 8);
-	tar_entry->gid   = strtol(tar.formated.gid, NULL, 8);
-	tar_entry->size  = strtol(tar.formated.size, NULL, 8);
-	tar_entry->mtime = strtol(tar.formated.mtime, NULL, 8);
-	tar_entry->link_name  = strlen(tar.formated.linkname) ? 
-	    xstrdup(tar.formated.linkname) : NULL;
-	tar_entry->device = (strtol(tar.formated.devmajor, NULL, 8) << 8) +
-		strtol(tar.formated.devminor, NULL, 8);
-
-	return(tar_entry);
-}
-#endif
-
-#ifdef L_deb_extract
-char *deb_extract(const char *package_filename, FILE *out_stream, 
-	const int extract_function, const char *prefix, const char *filename)
-{
-	FILE *deb_stream;
-	FILE *uncompressed_stream = NULL;
-	file_header_t *ar_header = NULL;
-	char **file_list = NULL;
-	char *output_buffer = NULL;
-	char *ared_file = NULL;
-	char ar_magic[8];
-	int gunzip_pid;
-
-	if (filename != NULL) {
-		file_list = xmalloc(sizeof(char *) * 2);
-		file_list[0] = xstrdup(filename);
-		file_list[1] = NULL;
-	}
-	
-	if (extract_function & extract_control_tar_gz) {
-		ared_file = xstrdup("control.tar.gz");
-	}
-	else if (extract_function & extract_data_tar_gz) {		
-		ared_file = xstrdup("data.tar.gz");
-	}
-
-	/* open the debian package to be worked on */
-	deb_stream = wfopen(package_filename, "r");
-	if (deb_stream == NULL) {
-		return(NULL);
-	}
-	/* set the buffer size */
-	setvbuf(deb_stream, NULL, _IOFBF, 0x8000);
-
-	/* check ar magic */
-	fread(ar_magic, 1, 8, deb_stream);
-	if (strncmp(ar_magic,"!<arch>",7) != 0) {
-		error_msg_and_die("invalid magic");
-	}
-	archive_offset = 8;
-
-	while ((ar_header = get_header_ar(deb_stream)) != NULL) {
-		if (strcmp(ared_file, ar_header->name) == 0) {
-			/* open a stream of decompressed data */
-			uncompressed_stream = gz_open(deb_stream, &gunzip_pid);
-			archive_offset = 0;
-			output_buffer = unarchive(uncompressed_stream, out_stream, get_header_tar, extract_function, prefix, file_list, NULL);
-		}
-		seek_sub_file(deb_stream, ar_header->size);
-		free(ar_header->name);
-		free(ar_header);
-	}
-	gz_close(gunzip_pid);
-	fclose(deb_stream);
-	fclose(uncompressed_stream);
-	free(ared_file);
-	if (filename != NULL) {
-		free(file_list[0]);
-		free(file_list);
-	}
-	return(output_buffer);
-}
-#endif