misc/mkstemps.c

   1 /* Copyright (C) 2009-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23 #ifndef __GT_FILE
  24 # define __GT_FILE 0
  25 #endif
  26
  27 /* Generate a unique temporary file name from TEMPLATE.  The last six
  28    characters before a suffix of length SUFFIXLEN of TEMPLATE must be
  29    "XXXXXX"; they are replaced with a string that makes the filename
  30    unique.  Then open the file and return a fd. */
  31 int
  32 mkstemps (char *template, int suffixlen)
  33 {
  34   if (suffixlen < 0)
  35     {
  36       __set_errno (EINVAL);
  37       return -1;
  38     }
  39
  40   return __gen_tempname (template, suffixlen, 0, __GT_FILE);
  41 }
  42
  43 #if !defined O_LARGEFILE || O_LARGEFILE == 0
  44 weak_alias (mkstemps, mkstemps64)
  45 #endif