X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=lib%2Fdup-safer-flag.c;fp=lib%2Fdup-safer-flag.c;h=aa28194d5355d36c790d403446a9c80815501b53;hb=a8a88eddaa90432e6ec1b8d9d5c9842bc91afd1d;hp=0000000000000000000000000000000000000000;hpb=20fcfc81ece044b8b0a6768ec6cf47be4e22a2e6;p=debian%2Fgzip
diff --git a/lib/dup-safer-flag.c b/lib/dup-safer-flag.c
new file mode 100644
index 0000000..aa28194
--- /dev/null
+++ b/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, 2009-2018 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 . */
+
+/* Written by Paul Eggert and Eric Blake. */
+
+#include
+
+/* Specification. */
+#include "unistd-safer.h"
+
+#include
+#include
+
+/* 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);
+}