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- #include <grp.h>
- #include <pwd.h>
- #include <sys/types.h>
- #include <unistd.h>
- #include <stdlib.h>
-
- int
- main (void)
- {
- uid_t me;
- struct passwd *my_passwd;
- struct group *my_group;
- char **members;
-
- /* Get information about the user ID. */
- me = getuid ();
- my_passwd = getpwuid (me);
- if (!my_passwd)
- {
- printf ("Couldn't find out about user %d.\n", (int) me);
- exit (EXIT_FAILURE);
- }
-
- /* Print the information. */
- printf ("I am %s.\n", my_passwd->pw_gecos);
- printf ("My login name is %s.\n", my_passwd->pw_name);
- printf ("My uid is %d.\n", (int) (my_passwd->pw_uid));
- printf ("My home directory is %s.\n", my_passwd->pw_dir);
- printf ("My default shell is %s.\n", my_passwd->pw_shell);
-
- /* Get information about the default group ID. */
- my_group = getgrgid (my_passwd->pw_gid);
- if (!my_group)
- {
- printf ("Couldn't find out about group %d.\n",
- (int) my_passwd->pw_gid);
- exit (EXIT_FAILURE);
- }
-
- /* Print the information. */
- printf ("My default group is %s (%d).\n",
- my_group->gr_name, (int) (my_passwd->pw_gid));
- printf ("The members of this group are:\n");
- members = my_group->gr_mem;
- while (*members)
- {
- printf (" %s\n", *(members));
- members++;
- }
-
- return EXIT_SUCCESS;
- }
-