diff options
Diffstat (limited to 'lib/fd-safer.c')
-rw-r--r-- | lib/fd-safer.c | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/lib/fd-safer.c b/lib/fd-safer.c deleted file mode 100644 index 5933bcbd1..000000000 --- a/lib/fd-safer.c +++ /dev/null @@ -1,59 +0,0 @@ -/* Return a safer copy of a file descriptor. - - 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 Paul Eggert. */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#include "unistd-safer.h" - -#include <errno.h> - -#include <unistd.h> -#ifndef STDIN_FILENO -# define STDIN_FILENO 0 -#endif -#ifndef STDERR_FILENO -# define STDERR_FILENO 2 -#endif - -/* Return FD, unless FD would be a copy of standard input, output, or - error; in that case, return a duplicate of FD, closing FD. On - failure to duplicate, close FD, set errno, and return -1. Preserve - errno if FD is negative, so that the caller can always inspect - errno when the returned value is negative. - - This function is usefully wrapped around functions that return file - descriptors, e.g., fd_safer (open ("file", O_RDONLY)). */ - -int -fd_safer (int fd) -{ - if (STDIN_FILENO <= fd && fd <= STDERR_FILENO) - { - int f = dup_safer (fd); - int e = errno; - close (fd); - errno = e; - fd = f; - } - - return fd; -} |