fgetgrent.c 1.4 KB

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  1. /*
  2. * fgetgrent.c - This file is part of the libc-8086/grp package for ELKS,
  3. * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
  4. *
  5. * This library 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. * This library 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 this library; if not, write to the Free
  17. * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18. *
  19. */
  20. #include <stdio.h>
  21. #include <errno.h>
  22. #include "config.h"
  23. #ifdef __UCLIBC_HAS_THREADS__
  24. #include <pthread.h>
  25. static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
  26. # define LOCK pthread_mutex_lock(&mylock)
  27. # define UNLOCK pthread_mutex_unlock(&mylock);
  28. #else
  29. # define LOCK
  30. # define UNLOCK
  31. #endif
  32. static char *line_buff = NULL;
  33. static char **members = NULL;
  34. struct group *fgetgrent(FILE * file)
  35. {
  36. struct group *grp;
  37. if (file == NULL) {
  38. __set_errno(EINTR);
  39. return NULL;
  40. }
  41. LOCK;
  42. grp = __getgrent(fileno(file), line_buff, members);
  43. UNLOCK;
  44. return grp;
  45. }