grp/testgrp.c

   1 #include <ansidecl.h>
   2 #include <grp.h>
   3 #include <pwd.h>
   4 #include <sys/types.h>
   5 #include <unistd.h>
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8
   9 int
  10 DEFUN_VOID(main)
  11 {
  12   uid_t me;
  13   struct passwd *my_passwd;
  14   struct group *my_group;
  15   char **members;
  16
  17   me = getuid ();
  18   my_passwd = getpwuid (me);
  19   if (my_passwd == NULL)
  20     perror ("getpwuid");
  21   else
  22     {
  23       printf ("My login name is %s.\n", my_passwd->pw_name);
  24       printf ("My uid is %d.\n", (int)(my_passwd->pw_uid));
  25       printf ("My home directory is %s.\n", my_passwd->pw_dir);
  26       printf ("My default shell is %s.\n", my_passwd->pw_shell);
  27
  28       my_group = getgrgid (my_passwd->pw_gid);
  29       if (my_group == NULL)
  30         perror ("getgrgid");
  31       else
  32         {
  33           printf ("My default group is %s (%d).\n",
  34                   my_group->gr_name, (int)(my_passwd->pw_gid));
  35           printf ("The members of this group are:\n");
  36           for (members = my_group->gr_mem; *members != NULL; ++members)
  37             printf ("  %s\n", *members);
  38         }
  39     }
  40
  41   exit (my_passwd && my_group ? EXIT_SUCCESS : EXIT_FAILURE);
  42 }
  43
  44
  45