fgetpwent.c 1.8 KB

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  1. /*
  2. * fgetpwent.c - This file is part of the libc-8086/pwd 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 <features.h>
  21. #include <errno.h>
  22. #include <stdio.h>
  23. #include "config.h"
  24. #ifdef __UCLIBC_HAS_THREADS__
  25. #include <pthread.h>
  26. static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
  27. # define LOCK pthread_mutex_lock(&mylock)
  28. # define UNLOCK pthread_mutex_unlock(&mylock);
  29. #else
  30. # define LOCK
  31. # define UNLOCK
  32. #endif
  33. int fgetpwent_r (FILE *file, struct passwd *password,
  34. char *buff, size_t buflen, struct passwd **result)
  35. {
  36. int res;
  37. if (file == NULL) {
  38. return EINTR;
  39. }
  40. *result = NULL;
  41. res = __getpwent_r(password, buff, buflen, fileno(file));
  42. *result = password;
  43. return res;
  44. }
  45. struct passwd *fgetpwent(FILE * file)
  46. {
  47. int ret;
  48. static char line_buff[PWD_BUFFER_SIZE];
  49. static struct passwd pwd;
  50. struct passwd *result;
  51. LOCK;
  52. if ((ret=fgetpwent_r(file, &pwd, line_buff, sizeof(line_buff), &result)) == 0) {
  53. UNLOCK;
  54. return &pwd;
  55. }
  56. UNLOCK;
  57. __set_errno(ret);
  58. return NULL;
  59. }