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/* 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 <string.h>
#include <signal.h>
#include "libbb.h"
/*
* The contents of argument depend on the value of function.
* It is either a dir name or a control file or field name(see dpkg_deb.c)
*/
extern char *deb_extract(const char *package_filename, const int function, const char *argument, const char *argument2)
{
FILE *deb_file, *uncompressed_file;
ar_headers_t *headers = NULL;
char *ared_file = NULL;
char *output_buffer = NULL;
int gunzip_pid;
switch (function) {
case (extract_info):
case (extract_control):
case (extract_field):
ared_file = xstrdup("control.tar.gz");
break;
default:
ared_file = xstrdup("data.tar.gz");
break;
}
/* open the debian package to be worked on */
deb_file = wfopen(package_filename, "r");
headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
/* get a linked list of all ar entries */
if ((headers = get_ar_headers(deb_file)) == NULL) {
error_msg("Couldnt get ar headers\n");
return(NULL);
}
/* seek to the start of the .tar.gz file within the ar file*/
if (seek_ared_file(deb_file, headers, ared_file) == EXIT_FAILURE) {
error_msg("Couldnt seek to ar file");
}
/* open a stream of decompressed data */
uncompressed_file = fdopen(gz_open(deb_file, &gunzip_pid), "r");
if (function & extract_fsys_tarfile) {
copy_file_chunk(uncompressed_file, stdout, -1);
} else {
FILE *output;
if (function & extract_contents_to_file) {
output = wfopen(argument, "w");
} else {
output = stdout;
}
output_buffer = untar(uncompressed_file, output, function, argument, argument2);
if (output != stdout) {
fclose(output);
}
}
gz_close(gunzip_pid);
fclose(deb_file);
fclose(uncompressed_file);
free(ared_file);
return(output_buffer);
}
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