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Member "cpio-2.13/gnu/dup-safer.c" (2 Jan 2017, 1046 Bytes) of package /linux/misc/cpio-2.13.tar.bz2:

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    1 /* Invoke dup, but avoid some glitches.
    2 
    3    Copyright (C) 2001, 2004-2006, 2009-2017 Free Software Foundation, Inc.
    4 
    5    This program is free software: you can redistribute it and/or modify
    6    it under the terms of the GNU General Public License as published by
    7    the Free Software Foundation; either version 3 of the License, or
    8    (at your option) any later version.
    9 
   10    This program is distributed in the hope that it will be useful,
   11    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   13    GNU General Public License for more details.
   14 
   15    You should have received a copy of the GNU General Public License
   16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
   17 
   18 /* Written by Paul Eggert.  */
   19 
   20 #include <config.h>
   21 
   22 #include "unistd-safer.h"
   23 
   24 #include <fcntl.h>
   25 #include <unistd.h>
   26 
   27 /* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or
   28    STDERR_FILENO.  */
   29 
   30 int
   31 dup_safer (int fd)
   32 {
   33   return fcntl (fd, F_DUPFD, STDERR_FILENO + 1);
   34 }