1 files changed, 83 insertions, 0 deletions
diff --git a/archival/libunarchive/deb_extract.c b/archival/libunarchive/deb_extract.c
new file mode 100644
index 0000000..e5b5c96
--- /dev/null
+++ b/archival/libunarchive/deb_extract.c
@@ -0,0 +1,83 @@
+/*
+ *  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 Library 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "unarchive.h"
+#include "libbb.h"
+
+char *deb_extract(const char *package_filename, FILE *out_stream, 
+	const int extract_function, const char *prefix, const char *filename)
+{
+	FILE *deb_stream;
+	FILE *uncompressed_stream = NULL;
+	file_header_t *ar_header = NULL;
+	char **file_list = NULL;
+	char *output_buffer = NULL;
+	char *ared_file = NULL;
+	char ar_magic[8];
+	int gunzip_pid;
+
+	if (filename != NULL) {
+		file_list = xmalloc(sizeof(char *) * 2);
+		file_list[0] = xstrdup(filename);
+		file_list[1] = NULL;
+	}
+	
+	if (extract_function & extract_control_tar_gz) {
+		ared_file = xstrdup("control.tar.gz");
+	}
+	else if (extract_function & extract_data_tar_gz) {		
+		ared_file = xstrdup("data.tar.gz");
+	}
+
+	/* open the debian package to be worked on */
+	deb_stream = wfopen(package_filename, "r");
+	if (deb_stream == NULL) {
+		return(NULL);
+	}
+	/* set the buffer size */
+	setvbuf(deb_stream, NULL, _IOFBF, 0x8000);
+
+	/* check ar magic */
+	fread(ar_magic, 1, 8, deb_stream);
+	if (strncmp(ar_magic,"!<arch>",7) != 0) {
+		error_msg_and_die("invalid magic");
+	}
+	archive_offset = 8;
+
+	while ((ar_header = get_header_ar(deb_stream)) != NULL) {
+		if (strcmp(ared_file, ar_header->name) == 0) {
+			/* open a stream of decompressed data */
+			uncompressed_stream = gz_open(deb_stream, &gunzip_pid);
+			archive_offset = 0;
+			output_buffer = unarchive(uncompressed_stream, out_stream, get_header_tar, extract_function, prefix, file_list, NULL);
+		}
+		seek_sub_file(deb_stream, ar_header->size);
+		free(ar_header->name);
+		free(ar_header);
+	}
+	gz_close(gunzip_pid);
+	fclose(deb_stream);
+	fclose(uncompressed_stream);
+	free(ared_file);
+	if (filename != NULL) {
+		free(file_list[0]);
+		free(file_list);
+	}
+	return(output_buffer);
+}
+\ No newline at end of file