testsuite/nsswitch/getpwent_r.c

   1 /*
   2  * Use set/get/endpwent calls from two processes to iterate over the
   3  * password database.  This checks the multithreaded stuff works.
   4  */
   5
   6 #include <stdio.h>
   7 #include <pwd.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <errno.h>
  12 #include <wait.h>
  13
  14 void dump_pwent(char *id)
  15 {
  16     struct passwd *pw;
  17     char fname[255];
  18     FILE *fptr;
  19
  20     /* Open results file */
  21
  22     sprintf(fname, "/tmp/getpwent_r-%s.out-%d", id, getpid());
  23
  24     if ((fptr = fopen(fname, "w")) < 0) {
  25         fprintf(stderr, "ERROR: could not open file %s: %s\n", fname,
  26                 sys_errlist[errno]);
  27         return;
  28     }
  29
  30     /* Dump passwd database */
  31
  32     setpwent();
  33
  34     while((pw = getpwent()) != NULL) {
  35        fprintf(fptr,"%s:%s:%s:%d:%d\n", pw->pw_name, pw->pw_passwd,
  36                pw->pw_gecos, pw->pw_uid, pw->pw_gid);
  37     }
  38
  39     endpwent();
  40
  41     /* Close results file */
  42
  43     fclose(fptr);
  44 }
  45
  46 #define NUM_FORKS 2
  47
  48 int main(int argc, char **argv)
  49 {
  50     pid_t pids[NUM_FORKS];
  51     int i, status;
  52
  53     /* Check args */
  54
  55     if (argc != 2) {
  56         printf("ERROR: must specify output file identifier\n");
  57         return 1;
  58     }
  59
  60     for(i = 0; i < NUM_FORKS; i++) {
  61
  62         /* Fork off lots */
  63
  64         if ((pids[i] = fork()) == -1) {
  65             perror("fork");
  66             return 1;
  67         }
  68
  69         /* Child does tests */
  70
  71         if (pids[i] == 0) {
  72             dump_pwent(argv[1]);
  73             return 0;
  74         }
  75     }
  76
  77     /* Wait for everyone to finish */
  78
  79     for (i = 0; i < NUM_FORKS; i++) {
  80         waitpid(pids[i], &status, 0);
  81     }
  82
  83     printf("PASS: getpwent_r.c\n");
  84     return 0;
  85 }