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https://github.com/sheumann/hush.git
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98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Copyright (C) tons of folks. Tracking down who wrote what
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* isn't something I'm going to worry about... If you wrote something
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* here, please feel free to acknowledge your work.
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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 GNU
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* 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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* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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* Permission has been granted to redistribute this code under the GPL.
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*
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*/
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include "libbb.h"
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/*
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* The contents of argument depend on the value of function.
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* It is either a dir name or a control file or field name(see dpkg_deb.c)
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*/
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extern char *deb_extract(const char *package_filename, const int function, const char *argument, const char *argument2)
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{
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FILE *deb_file, *uncompressed_file;
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ar_headers_t *headers = NULL;
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char *ared_file = NULL;
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char *output_buffer = NULL;
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int gunzip_pid;
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switch (function) {
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case (extract_info):
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case (extract_control):
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case (extract_field):
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ared_file = xstrdup("control.tar.gz");
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break;
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default:
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ared_file = xstrdup("data.tar.gz");
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break;
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}
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/* open the debian package to be worked on */
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deb_file = wfopen(package_filename, "r");
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headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
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/* get a linked list of all ar entries */
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if ((headers = get_ar_headers(deb_file)) == NULL) {
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error_msg("Couldnt get ar headers\n");
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return(NULL);
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}
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/* seek to the start of the .tar.gz file within the ar file*/
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if (seek_ared_file(deb_file, headers, ared_file) == EXIT_FAILURE) {
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error_msg("Couldnt seek to ar file");
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}
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/* open a stream of decompressed data */
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uncompressed_file = fdopen(gz_open(deb_file, &gunzip_pid), "r");
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if (function & extract_fsys_tarfile) {
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copy_file_chunk(uncompressed_file, stdout, -1);
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} else {
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FILE *output;
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if (function & extract_contents_to_file) {
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output = wfopen(argument, "w");
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} else {
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output = stdout;
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}
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output_buffer = untar(uncompressed_file, output, function, argument, argument2);
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if (output != stdout) {
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fclose(output);
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}
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}
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gz_close(gunzip_pid);
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fclose(deb_file);
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fclose(uncompressed_file);
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free(ared_file);
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return(output_buffer);
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} |