diff options
Diffstat (limited to 'libbb/untar.c')
| -rw-r--r-- | libbb/untar.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/libbb/untar.c b/libbb/untar.c deleted file mode 100644 index b6b4496..0000000 --- a/libbb/untar.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - * 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. - * - * NOTE: This is used by deb_extract to avoid calling the whole tar applet. - * Its functionality should be merged with tar to avoid duplication - */ - -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include "libbb.h" - -/* - * stdout can be redircted to FILE *output - * If const char *file_prefix isnt NULL is prepended to all the extracted filenames. - * The purpose of const char *argument depends on the value of const int untar_function - */ - -extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, - const char *argument, const char *file_prefix) -{ - typedef struct raw_tar_header { - 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 */ - } raw_tar_header_t; - - raw_tar_header_t raw_tar_header; - unsigned char *temp = (unsigned char *) &raw_tar_header; - long i; - long next_header_offset = 0; - long uncompressed_count = 0; - size_t size; - mode_t mode; - - while (fread((char *) &raw_tar_header, 1, 512, src_tar_file) == 512) { - long sum = 0; - - if (ferror(src_tar_file) || feof(src_tar_file)) { - perror_msg("untar: "); - break; - } - - uncompressed_count += 512; - - /* Check header has valid magic */ - if (strncmp(raw_tar_header.magic, "ustar", 5) != 0) { -/* - * FIXME, Need HELP with this - * - * This has to fail silently or it incorrectly reports errors when called from - * deb_extract. - * The problem is deb_extract decompresses the .gz file in a child process and - * untar reads from the child proccess. The child process finishes and exits, - * but fread reads 0's from the src_tar_file even though the child - * closed its handle. - */ -// error_msg("Invalid tar magic"); - break; - } - - /* Do checksum on headers */ - for (i = 0; i < 148 ; i++) { - sum += temp[i]; - } - sum += ' ' * 8; - for (i = 156; i < 512 ; i++) { - sum += temp[i]; - } - if (sum != strtol(raw_tar_header.chksum, NULL, 8)) { - error_msg("Invalid tar header checksum"); - break; - } - - /* convert to type'ed variables */ - size = strtol(raw_tar_header.size, NULL, 8); - parse_mode(raw_tar_header.mode, &mode); - - /* start of next header is at */ - next_header_offset = uncompressed_count + size; - if (size % 512 != 0) { - next_header_offset += (512 - size % 512); - } - - /* If an exclude list is specified check current file against list */ -#if 0 - if (*exclude_list != NULL) { - i = 0; - while (exclude_list[i] != 0) { - if (strncmp(exclude_list[i], raw_tar_header.name, strlen(raw_tar_header.name)) == 0) { - break; - } - i++; - } - if (exclude_list[i] != 0) { - continue; - } - } -#endif - if (untar_function & (extract_contents | extract_verbose_extract | extract_contents_to_file)) { - fprintf(output, "%s\n", raw_tar_header.name); - } - - switch (raw_tar_header.typeflag ) { - case '0': - case '\0': { - /* If the name ends in a '/' then assume it is - * supposed to be a directory, and fall through - */ - int name_length = strlen(raw_tar_header.name); - if (raw_tar_header.name[name_length - 1] != '/') { - switch (untar_function) { - case (extract_extract): - case (extract_verbose_extract): - case (extract_control): { - FILE *dst_file = NULL; - char *full_name; - - if (file_prefix != NULL) { - full_name = xmalloc(strlen(argument) + strlen(file_prefix) + name_length + 3); - sprintf(full_name, "%s/%s.%s", argument, file_prefix, strrchr(raw_tar_header.name, '/') + 1); - } else { - full_name = concat_path_file(argument, raw_tar_header.name); - } - dst_file = wfopen(full_name, "w"); - copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size); - uncompressed_count += size; - fclose(dst_file); - chmod(full_name, mode); - free(full_name); - } - break; - case (extract_info): - if (strstr(raw_tar_header.name, argument) != NULL) { - copy_file_chunk(src_tar_file, stdout, (unsigned long long) size); - uncompressed_count += size; - } - break; - case (extract_field): - if (strstr(raw_tar_header.name, "./control") != NULL) { - return(read_text_file_to_buffer(src_tar_file)); - } - break; - } - break; - } - } - case '5': - if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { - int ret; - char *dir; - dir = concat_path_file(argument, raw_tar_header.name); - ret = create_path(dir, mode); - free(dir); - if (ret == FALSE) { - perror_msg("%s: Cannot mkdir", raw_tar_header.name); - return NULL; - } - chmod(dir, mode); - } - break; - case '1': - if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { - if (link(raw_tar_header.linkname, raw_tar_header.name) < 0) { - perror_msg("%s: Cannot create hard link to '%s'", raw_tar_header.name, raw_tar_header.linkname); - return NULL; - } - } - break; - case '2': - if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { - if (symlink(raw_tar_header.linkname, raw_tar_header.name) < 0) { - perror_msg("%s: Cannot create symlink to '%s'", raw_tar_header.name, raw_tar_header.linkname); - return NULL; - } - } - break; - case '3': - case '4': - case '6': -// if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE) -// errorFlag=TRUE; -// break; - default: - error_msg("Unknown file type '%c' in tar file", raw_tar_header.typeflag); - return NULL; - } - /* - * Seek to start of next block, cant use fseek as unzip() does support it - */ - while (uncompressed_count < next_header_offset) { - if (fgetc(src_tar_file) == EOF) { - break; - } - uncompressed_count++; - } - } - return NULL; -} |