83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "unarchive.h"
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#include "libbb.h"
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char *deb_extract(const char *package_filename, FILE *out_stream,
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const int extract_function, const char *prefix, const char *filename)
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{
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FILE *deb_stream;
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FILE *uncompressed_stream = NULL;
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file_header_t *ar_header = NULL;
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char **file_list = NULL;
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char *output_buffer = NULL;
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char *ared_file = NULL;
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char ar_magic[8];
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int gunzip_pid;
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if (filename != NULL) {
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file_list = xmalloc(sizeof(char *) * 2);
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file_list[0] = xstrdup(filename);
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file_list[1] = NULL;
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}
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if (extract_function & extract_control_tar_gz) {
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ared_file = xstrdup("control.tar.gz");
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}
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else if (extract_function & extract_data_tar_gz) {
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ared_file = xstrdup("data.tar.gz");
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}
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/* open the debian package to be worked on */
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deb_stream = wfopen(package_filename, "r");
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if (deb_stream == NULL) {
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return(NULL);
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}
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/* set the buffer size */
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setvbuf(deb_stream, NULL, _IOFBF, 0x8000);
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/* check ar magic */
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fread(ar_magic, 1, 8, deb_stream);
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if (strncmp(ar_magic,"!<arch>",7) != 0) {
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error_msg_and_die("invalid magic");
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}
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archive_offset = 8;
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while ((ar_header = get_header_ar(deb_stream)) != NULL) {
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if (strcmp(ared_file, ar_header->name) == 0) {
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/* open a stream of decompressed data */
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uncompressed_stream = gz_open(deb_stream, &gunzip_pid);
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archive_offset = 0;
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output_buffer = unarchive(uncompressed_stream, out_stream, get_header_tar, extract_function, prefix, file_list, NULL);
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}
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seek_sub_file(deb_stream, ar_header->size);
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free(ar_header->name);
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free(ar_header);
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}
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gz_close(gunzip_pid);
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fclose(deb_stream);
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fclose(uncompressed_stream);
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free(ared_file);
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if (filename != NULL) {
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free(file_list[0]);
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free(file_list);
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}
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return(output_buffer);
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}
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