Mercurial > gnulib
view lib/dup-safer-flag.c @ 17362:7a2e583edf71
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author | Karl Berry <karl@freefriends.org> |
---|---|
date | Tue, 19 Mar 2013 10:47:12 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
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/* Duplicate a file descriptor result, avoiding clobbering STD{IN,OUT,ERR}_FILENO, with specific flags. Copyright (C) 2001, 2004-2006, 2009-2013 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 <http://www.gnu.org/licenses/>. */ /* Written by Paul Eggert and Eric Blake. */ #include <config.h> /* Specification. */ #include "unistd-safer.h" #include <fcntl.h> #include <unistd.h> /* 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); }