util: replace close_nointr_nofail() by a more useful safe_close()

safe_close() automatically becomes a NOP when a negative fd is passed,
and returns -1 unconditionally. This makes it easy to write lines like
this:

        fd = safe_close(fd);

Which will close an fd if it is open, and reset the fd variable
correctly.

By making use of this new scheme we can drop a > 200 lines of code that
was required to test for non-negative fds or to reset the closed fd
variable afterwards.

1 files changed, 1 insertions, 5 deletions

diff --git a/src/core/path.c b/src/core/path.c
index 93c51bb3be..20e454d96f 100644
--- a/src/core/path.c
+++ b/src/core/path.c
@@ -152,11 +152,7 @@ void path_spec_unwatch(PathSpec *s) {
         assert(s);
 
         s->event_source = sd_event_source_unref(s->event_source);
-
-        if (s->inotify_fd >= 0) {
-                close_nointr_nofail(s->inotify_fd);
-                s->inotify_fd = -1;
-        }
+        s->inotify_fd = safe_close(s->inotify_fd);
 }
 
 int path_spec_fd_event(PathSpec *s, uint32_t revents) {