utils: add lxc_deslashify

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>

src/lxc/utils.c

@@ -716,6 +716,24 @@ char **lxc_normalize_path(const char *path)
 	return components;
 }
 
+bool lxc_deslashify(char *path)
+{
+	char **parts = NULL, *path2;
+
+	parts = lxc_normalize_path(path);
+	if (!parts)
+		return false;
+
+	path2 = lxc_string_join("/", (const char **) parts, *path == '/');
+	lxc_free_array((void **) parts, free);
+	if (!path2)
+		return false;
+
+	strncpy(path, path2, strlen(path));
+	free(path2);
+	return true;
+}
+
 char *lxc_append_paths(const char *first, const char *second)
 {
 	size_t len = strlen(first) + strlen(second) + 1;

src/lxc/utils.h

@@ -248,6 +248,8 @@ extern char *lxc_string_join(const char *sep, const char **parts, bool use_as_pr
  *     foo//bar     ->   { foo, bar, NULL }
  */
 extern char **lxc_normalize_path(const char *path);
+/* remove multiple slashes from the path, e.g. ///foo//bar -> /foo/bar */
+extern bool lxc_deslashify(char *path);
 extern char *lxc_append_paths(const char *first, const char *second);
 /* Note: the following two functions use strtok(), so they will never
  *       consider an empty element, even if two delimiters are next to