/* Return a safer copy of a file descriptor.
- Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2005-2006, 2009-2011 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
#include "unistd-safer.h"
#include <errno.h>
-
#include <unistd.h>
/* Return FD, unless FD would be a copy of standard input, output, or
return fd;
}
-
-#if GNULIB_CLOEXEC
-
-/* Return FD, unless FD would be a copy of standard input, output, or
- error; in that case, return a duplicate of FD, closing FD. If FLAG
- contains O_CLOEXEC, the returned FD will have close-on-exec
- semantics. 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_flag (open ("file", O_RDONLY | flag), flag). */
-
-int
-fd_safer_flag (int fd, int flag)
-{
- if (STDIN_FILENO <= fd && fd <= STDERR_FILENO)
- {
- int f = dup_safer_flag (fd, flag);
- int e = errno;
- close (fd);
- errno = e;
- fd = f;
- }
-
- return fd;
-}
-
-#endif /* GNULIB_CLOEXEC */