[src/trunk]: src/usr.bin/make/filemon Use O_CLOEXEC and save a syscall.

[sjg <sjg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9aa5583c19ee
branches:  trunk
changeset: 1011775:9aa5583c19ee
user:      sjg <sjg%NetBSD.org@localhost>
date:      Fri Jul 10 15:53:30 2020 +0000

description:
Use O_CLOEXEC and save a syscall.

Reviewed by: riastradh

diffstat:

 usr.bin/make/filemon/filemon_dev.c |  5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diffs (24 lines):

diff -r d52032b41278 -r 9aa5583c19ee usr.bin/make/filemon/filemon_dev.c
--- a/usr.bin/make/filemon/filemon_dev.c        Fri Jul 10 15:12:33 2020 +0000
+++ b/usr.bin/make/filemon/filemon_dev.c        Fri Jul 10 15:53:30 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: filemon_dev.c,v 1.2 2020/07/10 00:42:53 sjg Exp $      */
+/*     $NetBSD: filemon_dev.c,v 1.3 2020/07/10 15:53:30 sjg Exp $      */
 
 /*-
  * Copyright (c) 2020 The NetBSD Foundation, Inc.
@@ -70,13 +70,12 @@
                return NULL;
 
        /* Try opening /dev/filemon, up to six times (cargo cult!).  */
-       for (i = 0; (F->fd = open(_PATH_FILEMON, O_RDWR)) == -1; i++) {
+       for (i = 0; (F->fd = open(_PATH_FILEMON, O_RDWR|O_CLOEXEC)) == -1; i++) {
                if (i == 5) {
                        error = errno;
                        goto fail0;
                }
        }
-       (void)fcntl(F->fd, F_SETFD, FD_CLOEXEC);
 
        /* Success!  */
        return F;