diff options
Diffstat (limited to 'libbb/deb_extract.c')
| -rw-r--r-- | libbb/deb_extract.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/libbb/deb_extract.c b/libbb/deb_extract.c new file mode 100644 index 0000000..358c4d0 --- /dev/null +++ b/libbb/deb_extract.c @@ -0,0 +1,122 @@ +/* vi: set sw=4 ts=4: */ +/* + * Copyright (C) tons of folks. Tracking down who wrote what + * isn't something I'm going to worry about... If you wrote something + * here, please feel free to acknowledge your work. + * + * 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 + * + * Based in part on code from sash, Copyright (c) 1999 by David I. Bell + * Permission has been granted to redistribute this code under the GPL. + * + */ + +#include <fcntl.h> +#include <unistd.h> +#include <stdlib.h> +#include <signal.h> +#include "libbb.h" + +/* From gunzip.c */ +extern int gz_open(FILE *compressed_file, int *pid); +extern void gz_close(int gunzip_pid); + +extern int tar_unzip_init(int tarFd); +extern int readTarFile(int tarFd, int extractFlag, int listFlag, + int tostdoutFlag, int verboseFlag, char** extractList, char** excludeList); + +extern int deb_extract(int optflags, const char *dir_name, const char *deb_filename) +{ + const int dpkg_deb_contents = 1; + const int dpkg_deb_control = 2; +// const int dpkg_deb_info = 4; + const int dpkg_deb_extract = 8; + const int dpkg_deb_verbose_extract = 16; + const int dpkg_deb_list = 32; + + char **extract_list = NULL; + ar_headers_t *ar_headers = NULL; + char ar_filename[15]; + int extract_flag = FALSE; + int list_flag = FALSE; + int verbose_flag = FALSE; + int extract_to_stdout = FALSE; + int srcFd = 0; + int status; + pid_t pid; + FILE *comp_file = NULL; + + if (dpkg_deb_contents == (dpkg_deb_contents & optflags)) { + strcpy(ar_filename, "data.tar.gz"); + verbose_flag = TRUE; + list_flag = TRUE; + } + if (dpkg_deb_list == (dpkg_deb_list & optflags)) { + strcpy(ar_filename, "data.tar.gz"); + list_flag = TRUE; + } + if (dpkg_deb_control == (dpkg_deb_control & optflags)) { + strcpy(ar_filename, "control.tar.gz"); + extract_flag = TRUE; + } + if (dpkg_deb_extract == (dpkg_deb_extract & optflags)) { + strcpy(ar_filename, "data.tar.gz"); + extract_flag = TRUE; + } + if (dpkg_deb_verbose_extract == (dpkg_deb_verbose_extract & optflags)) { + strcpy(ar_filename, "data.tar.gz"); + extract_flag = TRUE; + list_flag = TRUE; + } + + ar_headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t)); + srcFd = open(deb_filename, O_RDONLY); + + *ar_headers = get_ar_headers(srcFd); + if (ar_headers->next == NULL) { + error_msg_and_die("Couldnt find %s in %s", ar_filename, deb_filename); + } + + while (ar_headers->next != NULL) { + if (strcmp(ar_headers->name, ar_filename) == 0) { + break; + } + ar_headers = ar_headers->next; + } + lseek(srcFd, ar_headers->offset, SEEK_SET); + /* Uncompress the file */ + comp_file = fdopen(srcFd, "r"); + if ((srcFd = gz_open(comp_file, &pid)) == EXIT_FAILURE) { + error_msg_and_die("Couldnt unzip file"); + } + if ( dir_name != NULL) { + if (is_directory(dir_name, TRUE, NULL)==FALSE) { + mkdir(dir_name, 0755); + } + if (chdir(dir_name)==-1) { + error_msg_and_die("Cannot change to dir %s", dir_name); + } + } + status = readTarFile(srcFd, extract_flag, list_flag, + extract_to_stdout, verbose_flag, NULL, extract_list); + + /* we are deliberately terminating the child so we can safely ignore this */ + signal(SIGTERM, SIG_IGN); + gz_close(pid); + close(srcFd); + fclose(comp_file); + + return status; +}
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