1 /* Invoke pipe, but avoid some glitches. 2 Copyright (C) 2005 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software Foundation, 16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 17 18 /* Written by Jim Meyering. */ 19 20 #ifdef HAVE_CONFIG_H 21 # include <config.h> 22 #endif 23 24 #include "unistd-safer.h" 25 26 #include <unistd.h> 27 28 /* Like pipe, but ensure that neither of the file descriptors is 29 STDIN_FILENO, STDOUT_FILENO, or STDERR_FILENO. */ 30 31 int 32 pipe_safer (int fd[2]) 33 { 34 int fail = pipe (fd); 35 if (fail) 36 return fail; 37 38 { 39 int i; 40 for (i = 0; i < 2; i++) 41 { 42 int f = fd_safer (fd[i]); 43 if (f < 0) 44 return -1; 45 fd[i] = f; 46 } 47 } 48 49 return 0; 50 } 51
