tempnam.c 1.6 KB

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  1. /* Copyright (C) 1991,1993,1996-1999,2000 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Library General Public License as
  5. published by the Free Software Foundation; either version 2 of the
  6. License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Library General Public License for more details.
  11. You should have received a copy of the GNU Library General Public
  12. License along with the GNU C Library; see the file COPYING.LIB. If not,
  13. see <http://www.gnu.org/licenses/>. */
  14. #include <stdio.h>
  15. #include <string.h>
  16. #include "../misc/internals/tempname.h"
  17. /* Generate a unique temporary filename using up to five characters of PFX
  18. if it is not NULL. The directory to put this file in is searched for
  19. as follows: First the environment variable "TMPDIR" is checked.
  20. If it contains the name of a writable directory, that directory is used.
  21. If not and if DIR is not NULL, that value is checked. If that fails,
  22. P_tmpdir is tried and finally "/tmp". The storage for the filename
  23. is allocated by `malloc'. */
  24. char *
  25. tempnam (const char *dir, const char *pfx)
  26. {
  27. char buf[FILENAME_MAX];
  28. if (__path_search (buf, FILENAME_MAX, dir, pfx, 1))
  29. return NULL;
  30. if (__gen_tempname (buf, __GT_NOCREATE, 0, 0, 0))
  31. return NULL;
  32. return strdup (buf);
  33. }