libs/port/mkstemp.c

   1 /*
   2  * mkstemp function
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <fcntl.h>
  25 #include <stdlib.h>
  26 #ifdef HAVE_UNISTD_H
  27 # include <unistd.h>
  28 #endif
  29
  30 #ifndef HAVE_MKSTEMP
  31 int mkstemp(char *tmpfn)
  32 {
  33     int tries;
  34     char *xstart;
  35
  36     xstart = tmpfn+strlen(tmpfn)-1;
  37     while ((xstart > tmpfn) && (*xstart == 'X'))
  38         xstart--;
  39     tries = 10;
  40     while (tries--)
  41     {
  42         char *newfn = mktemp(tmpfn);
  43         int fd;
  44         if (!newfn) /* something else broke horribly */
  45             return -1;
  46         fd = open(newfn,O_CREAT|O_RDWR|O_EXCL,0600);
  47         if (fd!=-1)
  48             return fd;
  49         newfn = xstart;
  50         /* fill up with X and try again ... */
  51         while (*newfn) *newfn++ = 'X';
  52     }
  53     return -1;
  54 }
  55 #endif /* HAVE_MKSTEMP */