1: /* Utility to pick a temporary filename prefix.
    2:    Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
    3: 
    4: This file is part of the libiberty library.
    5: Libiberty is free software; you can redistribute it and/or
    6: modify it under the terms of the GNU Library General Public
    7: License as published by the Free Software Foundation; either
    8: version 2 of the License, or (at your option) any later version.
    9: 
   10: Libiberty 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: Library General Public License for more details.
   14: 
   15: You should have received a copy of the GNU Library General Public
   16: License along with libiberty; see the file COPYING.LIB.  If not,
   17: write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
   18: Boston, MA 02110-1301, USA.  */
   19: 
   20: #ifdef HAVE_CONFIG_H
   21: #include "config.h"
   22: #endif
   23: 
   24: #include <stdio.h>      /* May get P_tmpdir.  */
   25: #ifdef HAVE_STDLIB_H
   26: #include <stdlib.h>
   27: #endif
   28: #ifdef HAVE_STRING_H
   29: #include <string.h>
   30: #endif
   31: 
   32: #include "libiberty.h"
   33: extern char *choose_tmpdir (void);
   34: 
   35: /* Name of temporary file.
   36:    mktemp requires 6 trailing X's.  */
   37: #define TEMP_FILE "ccXXXXXX"
   38: #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
   39: 
   40: /*
   41: 
   42: @deftypefn Extension char* choose_temp_base (void)
   43: 
   44: Return a prefix for temporary file names or @code{NULL} if unable to
   45: find one.  The current directory is chosen if all else fails so the
   46: program is exited if a temporary directory can't be found (@code{mktemp}
   47: fails).  The buffer for the result is obtained with @code{xmalloc}.
   48: 
   49: This function is provided for backwards compatibility only.  Its use is
   50: not recommended.
   51: 
   52: @end deftypefn
   53: 
   54: */
   55: 
   56: char *
   57: choose_temp_base (void)
   58: {
   59:   const char *base = choose_tmpdir ();
   60:   char *temp_filename;
   61:   int len;
   62: 
   63:   len = strlen (base);
   64:   temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1);
   65:   strcpy (temp_filename, base);
   66:   strcpy (temp_filename + len, TEMP_FILE);
   67: 
   68:   if (mktemp (temp_filename) == 0)
   69:     abort ();
   70:   return temp_filename;
   71: }