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  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. #include <sys/types.h>
  26. #ifdef HAVE_UNISTD_H
  27. #include <unistd.h>
  28. #endif
  29. #ifdef HAVE_STDLIB_H
  30. #include <stdlib.h>
  31. #endif
  32. #ifdef HAVE_STRING_H
  33. #include <string.h>
  34. #endif
  35.  
  36. #include "libiberty.h"
  37.  
  38. /* Name of temporary file.
  39.    mktemp requires 6 trailing X's.  */
  40. #define TEMP_FILE "ccXXXXXX"
  41. #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
  42.  
  43. /*
  44.  
  45. @deftypefn Extension char* choose_temp_base (void)
  46.  
  47. Return a prefix for temporary file names or @code{NULL} if unable to
  48. find one.  The current directory is chosen if all else fails so the
  49. program is exited if a temporary directory can't be found (@code{mktemp}
  50. fails).  The buffer for the result is obtained with @code{xmalloc}.
  51.  
  52. This function is provided for backwards compatibility only.  Its use is
  53. not recommended.
  54.  
  55. @end deftypefn
  56.  
  57. */
  58.  
  59. char *
  60. choose_temp_base (void)
  61. {
  62.   const char *base = choose_tmpdir ();
  63.   char *temp_filename;
  64.   int len;
  65.  
  66.   len = strlen (base);
  67.   temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1);
  68.   strcpy (temp_filename, base);
  69.   strcpy (temp_filename + len, TEMP_FILE);
  70.  
  71.   if (mktemp (temp_filename) == 0)
  72.     abort ();
  73.   return temp_filename;
  74. }
  75.