/* Invoke pipe, but avoid some glitches. Copyright (C) 2005 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 2, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* Written by Jim Meyering. */ #if HAVE_CONFIG_H # include #endif #include "unistd-safer.h" #include /* Like pipe, but ensure that neither of the file descriptors is STDIN_FILENO, STDOUT_FILENO, or STDERR_FILENO. */ int pipe_safer (int fd[2]) { int fail = pipe (fd); if (fail) return fail; { int i; for (i = 0; i < 2; i++) { int f = fd_safer (fd[i]); if (f < 0) return -1; fd[i] = f; } } return 0; }