Home | History | Annotate | Download | only in lib
      1 /* Invoke dup, but avoid some glitches.
      2 
      3    Copyright (C) 2001, 2004-2006, 2009-2012 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 }
     35