sysdeps/unix/sysv/linux/gentempfd.c

   1 /* Generate a temporary file descriptor.  Linux version.
   2    Copyright (C) 2017-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <fcntl.h>
  21 #include <errno.h>
  22 #include <string.h>
  23
  24 int
  25 __gen_tempfd (int flags)
  26 {
  27   int fd = __open (P_tmpdir, O_RDWR | O_TMPFILE | O_EXCL | flags,
  28                    S_IRUSR | S_IWUSR);
  29   if (fd < 0 && errno == ENOENT && strcmp (P_tmpdir, "/tmp") != 0)
  30     fd = __open ("/tmp", O_RDWR | O_TMPFILE | O_EXCL | flags,
  31                  S_IRUSR | S_IWUSR);
  32
  33   return fd;
  34 }
  35 libc_hidden_def (__gen_tempfd)