summaryrefslogtreecommitdiffstats
path: root/gl/lib/dup-safer-flag.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:19:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:19:27 +0000
commite0023883c6d2e6745a19e4b48e186ed156c1fca8 (patch)
tree1a48b8056ec984385d0d862b683535d04d6ed215 /gl/lib/dup-safer-flag.c
parentInitial commit. (diff)
downloadman-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.tar.xz
man-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.zip
Adding upstream version 2.11.2.upstream/2.11.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--gl/lib/dup-safer-flag.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/gl/lib/dup-safer-flag.c b/gl/lib/dup-safer-flag.c
new file mode 100644
index 0000000..f87792a
--- /dev/null
+++ b/gl/lib/dup-safer-flag.c
@@ -0,0 +1,38 @@
+/* Duplicate a file descriptor result, avoiding clobbering
+ STD{IN,OUT,ERR}_FILENO, with specific flags.
+
+ Copyright (C) 2001, 2004-2006, 2009-2022 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert and Eric Blake. */
+
+#include <config.h>
+
+/* Specification. */
+#include "unistd-safer.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+
+/* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or
+ STDERR_FILENO. If FLAG contains O_CLOEXEC, behave like
+ fcntl(F_DUPFD_CLOEXEC) rather than fcntl(F_DUPFD). */
+
+int
+dup_safer_flag (int fd, int flag)
+{
+ return fcntl (fd, (flag & O_CLOEXEC) ? F_DUPFD_CLOEXEC : F_DUPFD,
+ STDERR_FILENO + 1);
+}