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-rw-r--r--archival/libunarchive/deb_extract.c83
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