Imported Upstream version 1.4.16+git20130902

gl/cloexec.c

@@ -1,83 +0,0 @@
-/* closexec.c - set or clear the close-on-exec descriptor flag
-
-   Copyright (C) 1991, 2004-2006, 2009-2010 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/>.
-
-   The code is taken from glibc/manual/llio.texi  */
-
-#include <config.h>
-
-#include "cloexec.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-/* Set the `FD_CLOEXEC' flag of DESC if VALUE is true,
-   or clear the flag if VALUE is false.
-   Return 0 on success, or -1 on error with `errno' set.
-
-   Note that on MingW, this function does NOT protect DESC from being
-   inherited into spawned children.  Instead, either use dup_cloexec
-   followed by closing the original DESC, or use interfaces such as
-   open or pipe2 that accept flags like O_CLOEXEC to create DESC
-   non-inheritable in the first place.  */
-
-int
-set_cloexec_flag (int desc, bool value)
-{
-#ifdef F_SETFD
-
-  int flags = fcntl (desc, F_GETFD, 0);
-
-  if (0 <= flags)
-    {
-      int newflags = (value ? flags | FD_CLOEXEC : flags & ~FD_CLOEXEC);
-
-      if (flags == newflags
-          || fcntl (desc, F_SETFD, newflags) != -1)
-        return 0;
-    }
-
-  return -1;
-
-#else /* !F_SETFD */
-
-  /* Use dup2 to reject invalid file descriptors; the cloexec flag
-     will be unaffected.  */
-  if (desc < 0)
-    {
-      errno = EBADF;
-      return -1;
-    }
-  if (dup2 (desc, desc) < 0)
-    /* errno is EBADF here.  */
-    return -1;
-
-  /* There is nothing we can do on this kind of platform.  Punt.  */
-  return 0;
-#endif /* !F_SETFD */
-}
-
-
-/* Duplicates a file handle FD, while marking the copy to be closed
-   prior to exec or spawn.  Returns -1 and sets errno if FD could not
-   be duplicated.  */
-
-int
-dup_cloexec (int fd)
-{
-  return fcntl (fd, F_DUPFD_CLOEXEC, 0);
-}