3 files changed, 39 insertions, 5 deletions
diff --git a/src/libudev/device-nodes.c b/src/libudev/device-nodes.c
index c548f1ffff..9efafaf548 100644
--- a/src/libudev/device-nodes.c
+++ b/src/libudev/device-nodes.c
@@ -21,6 +21,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <stdint.h>
 #include <sys/types.h>
 
diff --git a/src/libudev/path-util.c b/src/libudev/path-util.c
index 417450f283..616577088c 100644
--- a/src/libudev/path-util.c
+++ b/src/libudev/path-util.c
@@ -331,3 +331,34 @@ fallback:
 
         return a.st_dev != b.st_dev;
 }
+
+bool paths_check_timestamp(char **paths, usec_t *paths_ts_usec, bool update)
+{
+        unsigned int i;
+        bool changed = false;
+
+        if (paths == NULL)
+                goto out;
+
+        for (i = 0; paths[i]; i++) {
+                struct stat stats;
+
+                if (stat(paths[i], &stats) < 0)
+                        continue;
+
+                if (paths_ts_usec[i] == timespec_load(&stats.st_mtim))
+                        continue;
+
+                /* first check */
+                if (paths_ts_usec[i] != 0) {
+                        log_debug("reload - timestamp of '%s' changed\n", paths[i]);
+                        changed = true;
+                }
+
+                /* update timestamp */
+                if (update)
+                        paths_ts_usec[i] = timespec_load(&stats.st_mtim);
+        }
+out:
+        return changed;
+}
diff --git a/src/libudev/path-util.h b/src/libudev/path-util.h
index 653ae8d7c8..0b7577ff4f 100644
--- a/src/libudev/path-util.h
+++ b/src/libudev/path-util.h
@@ -1,9 +1,5 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#pragma once
-
 /***
-  This file is part of systemd.
+  This file is part of eudev, forked from systemd.
 
   Copyright 2010-2012 Lennart Poettering
 
@@ -22,6 +18,10 @@
 ***/
 
 #include <stdbool.h>
+#include <inttypes.h>
+
+typedef uint64_t usec_t;
+typedef uint64_t nsec_t;
 
 char* path_get_file_name(const char *p) _pure_;
 int path_get_parent(const char *path, char **parent);
@@ -35,3 +35,5 @@ char** path_strv_canonicalize(char **l);
 char** path_strv_canonicalize_uniq(char **l);
 
 int path_is_mount_point(const char *path, bool allow_symlink);
+
+bool paths_check_timestamp(char **paths, usec_t *paths_ts_usec, bool update);