| Glenn L McGrath | 95ebf61 | 2001-10-25 14:18:08 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License as published by |
| 4 | * the Free Software Foundation; either version 2 of the License, or |
| 5 | * (at your option) any later version. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU Library General Public License for more details. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License |
| 13 | * along with this program; if not, write to the Free Software |
| 14 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 15 | */ |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <string.h> |
| 20 | #include "unarchive.h" |
| 21 | #include "libbb.h" |
| 22 | |
| 23 | char *deb_extract(const char *package_filename, FILE *out_stream, |
| 24 | const int extract_function, const char *prefix, const char *filename) |
| 25 | { |
| 26 | FILE *deb_stream; |
| 27 | FILE *uncompressed_stream = NULL; |
| 28 | file_header_t *ar_header = NULL; |
| 29 | char **file_list = NULL; |
| 30 | char *output_buffer = NULL; |
| 31 | char *ared_file = NULL; |
| 32 | char ar_magic[8]; |
| 33 | int gunzip_pid; |
| 34 | |
| 35 | if (filename != NULL) { |
| 36 | file_list = xmalloc(sizeof(char *) * 2); |
| 37 | file_list[0] = xstrdup(filename); |
| 38 | file_list[1] = NULL; |
| 39 | } |
| 40 | |
| 41 | if (extract_function & extract_control_tar_gz) { |
| 42 | ared_file = xstrdup("control.tar.gz"); |
| 43 | } |
| 44 | else if (extract_function & extract_data_tar_gz) { |
| 45 | ared_file = xstrdup("data.tar.gz"); |
| 46 | } |
| 47 | |
| 48 | /* open the debian package to be worked on */ |
| 49 | deb_stream = wfopen(package_filename, "r"); |
| 50 | if (deb_stream == NULL) { |
| 51 | return(NULL); |
| 52 | } |
| 53 | /* set the buffer size */ |
| 54 | setvbuf(deb_stream, NULL, _IOFBF, 0x8000); |
| 55 | |
| 56 | /* check ar magic */ |
| 57 | fread(ar_magic, 1, 8, deb_stream); |
| 58 | if (strncmp(ar_magic,"!<arch>",7) != 0) { |
| 59 | error_msg_and_die("invalid magic"); |
| 60 | } |
| 61 | archive_offset = 8; |
| 62 | |
| 63 | while ((ar_header = get_header_ar(deb_stream)) != NULL) { |
| 64 | if (strcmp(ared_file, ar_header->name) == 0) { |
| 65 | /* open a stream of decompressed data */ |
| 66 | uncompressed_stream = gz_open(deb_stream, &gunzip_pid); |
| 67 | archive_offset = 0; |
| 68 | output_buffer = unarchive(uncompressed_stream, out_stream, get_header_tar, extract_function, prefix, file_list, NULL); |
| 69 | } |
| 70 | seek_sub_file(deb_stream, ar_header->size); |
| 71 | free(ar_header->name); |
| 72 | free(ar_header); |
| 73 | } |
| 74 | gz_close(gunzip_pid); |
| 75 | fclose(deb_stream); |
| 76 | fclose(uncompressed_stream); |
| 77 | free(ared_file); |
| 78 | if (filename != NULL) { |
| 79 | free(file_list[0]); |
| 80 | free(file_list); |
| 81 | } |
| 82 | return(output_buffer); |
| 83 | } |