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-rw-r--r--modules/libmar/src/mar_extract.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/modules/libmar/src/mar_extract.c b/modules/libmar/src/mar_extract.c
new file mode 100644
index 000000000..ec1cd6c53
--- /dev/null
+++ b/modules/libmar/src/mar_extract.c
@@ -0,0 +1,83 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include "mar_private.h"
+#include "mar.h"
+
+#ifdef XP_WIN
+#include <io.h>
+#include <direct.h>
+#endif
+
+/* Ensure that the directory containing this file exists */
+static int mar_ensure_parent_dir(const char *path)
+{
+ char *slash = strrchr(path, '/');
+ if (slash)
+ {
+ *slash = '\0';
+ mar_ensure_parent_dir(path);
+#ifdef XP_WIN
+ _mkdir(path);
+#else
+ mkdir(path, 0755);
+#endif
+ *slash = '/';
+ }
+ return 0;
+}
+
+static int mar_test_callback(MarFile *mar, const MarItem *item, void *unused) {
+ FILE *fp;
+ char buf[BLOCKSIZE];
+ int fd, len, offset = 0;
+
+ if (mar_ensure_parent_dir(item->name))
+ return -1;
+
+#ifdef XP_WIN
+ fd = _open(item->name, _O_BINARY|_O_CREAT|_O_TRUNC|_O_WRONLY, item->flags);
+#else
+ fd = creat(item->name, item->flags);
+#endif
+ if (fd == -1) {
+ fprintf(stderr, "ERROR: could not create file in mar_test_callback()\n");
+ perror(item->name);
+ return -1;
+ }
+
+ fp = fdopen(fd, "wb");
+ if (!fp)
+ return -1;
+
+ while ((len = mar_read(mar, item, offset, buf, sizeof(buf))) > 0) {
+ if (fwrite(buf, len, 1, fp) != 1)
+ break;
+ offset += len;
+ }
+
+ fclose(fp);
+ return len == 0 ? 0 : -1;
+}
+
+int mar_extract(const char *path) {
+ MarFile *mar;
+ int rv;
+
+ mar = mar_open(path);
+ if (!mar)
+ return -1;
+
+ rv = mar_enum_items(mar, mar_test_callback, NULL);
+
+ mar_close(mar);
+ return rv;
+}