1 files changed, 47 insertions, 21 deletions

diff --git a/source3/modules/vfs_shadow_copy2.c b/source3/modules/vfs_shadow_copy2.c
index 97f208e566..ac6cdbb42d 100644
--- a/source3/modules/vfs_shadow_copy2.c
+++ b/source3/modules/vfs_shadow_copy2.c
@@ -158,60 +158,86 @@ static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
 }
 
 /**
- * Given a timstamp, build the string to insert into a path
- * as a path component for creating the local path to the
- * snapshot at the given timestamp of the input path.
- *
- * In the case of a parallel snapdir (specified with an
- * absolute path), this is the inital portion of the
- * local path of any snapshot file. The complete path is
- * obtained by appending the portion of the file's path
- * below the share root's mountpoint.
+ * Given a timstamp, build the posix level GTM-tag string
+ * based on the configurable format.
  */
-static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
-					struct vfs_handle_struct *handle,
-					time_t snapshot)
+static size_t shadow_copy2_posix_gmt_string(struct vfs_handle_struct *handle,
+					    time_t snapshot,
+					    char *snaptime_string,
+					    size_t len)
 {
 	struct tm snap_tm;
-	fstring snaptime_string;
 	size_t snaptime_len;
 	struct shadow_copy2_config *config;
-	char *result = NULL;
 
 	SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
-				return NULL);
+				return 0);
 
 	if (config->use_sscanf) {
 		snaptime_len = snprintf(snaptime_string,
-					sizeof(snaptime_string),
+					len,
 					config->gmt_format,
 					(unsigned long)snapshot);
 		if (snaptime_len <= 0) {
 			DEBUG(10, ("snprintf failed\n"));
-			return NULL;
+			return snaptime_len;
 		}
 	} else {
 		if (config->use_localtime) {
 			if (localtime_r(&snapshot, &snap_tm) == 0) {
 				DEBUG(10, ("gmtime_r failed\n"));
-				return NULL;
+				return -1;
 			}
 		} else {
 			if (gmtime_r(&snapshot, &snap_tm) == 0) {
 				DEBUG(10, ("gmtime_r failed\n"));
-				return NULL;
+				return -1;
 			}
 		}
 		snaptime_len = strftime(snaptime_string,
-					sizeof(snaptime_string),
+					len,
 					config->gmt_format,
 					&snap_tm);
 		if (snaptime_len == 0) {
 			DEBUG(10, ("strftime failed\n"));
-			return NULL;
+			return 0;
 		}
 	}
 
+	return snaptime_len;
+}
+
+/**
+ * Given a timstamp, build the string to insert into a path
+ * as a path component for creating the local path to the
+ * snapshot at the given timestamp of the input path.
+ *
+ * In the case of a parallel snapdir (specified with an
+ * absolute path), this is the inital portion of the
+ * local path of any snapshot file. The complete path is
+ * obtained by appending the portion of the file's path
+ * below the share root's mountpoint.
+ */
+static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
+					struct vfs_handle_struct *handle,
+					time_t snapshot)
+{
+	fstring snaptime_string;
+	size_t snaptime_len = 0;
+	char *result = NULL;
+	struct shadow_copy2_config *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
+				return NULL);
+
+	snaptime_len = shadow_copy2_posix_gmt_string(handle,
+						     snapshot,
+						     snaptime_string,
+						     sizeof(snaptime_string));
+	if (snaptime_len <= 0) {
+		return NULL;
+	}
+
 	if (config->snapdir_absolute) {
 		result = talloc_asprintf(mem_ctx, "%s/%s",
 					 config->snapdir, snaptime_string);