basic: split out inotify-related calls from fs-util.h → inotify-util.h

src/basic/inotify-util.c

@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "fd-util.h"
+#include "inotify-util.h"
+
+int inotify_add_watch_fd(int fd, int what, uint32_t mask) {
+        int wd;
+
+        /* This is like inotify_add_watch(), except that the file to watch is not referenced by a path, but by an fd */
+        wd = inotify_add_watch(fd, FORMAT_PROC_FD_PATH(what), mask);
+        if (wd < 0)
+                return -errno;
+
+        return wd;
+}
+
+int inotify_add_watch_and_warn(int fd, const char *pathname, uint32_t mask) {
+        int wd;
+
+        wd = inotify_add_watch(fd, pathname, mask);
+        if (wd < 0) {
+                if (errno == ENOSPC)
+                        return log_error_errno(errno, "Failed to add a watch for %s: inotify watch limit reached", pathname);
+
+                return log_error_errno(errno, "Failed to add a watch for %s: %m", pathname);
+        }
+
+        return wd;
+}