| #include <grp.h> |
| #include <pwd.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| uid_t me; |
| struct passwd *my_passwd; |
| struct group *my_group = NULL; |
| char **members; |
| |
| me = getuid (); |
| my_passwd = getpwuid (me); |
| if (my_passwd == NULL) |
| printf ("Cannot find user entry for UID %d\n", me); |
| else |
| { |
| 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); |
| |
| my_group = getgrgid (my_passwd->pw_gid); |
| if (my_group == NULL) |
| printf ("No data for group %d found\n", my_passwd->pw_gid); |
| else |
| { |
| 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"); |
| for (members = my_group->gr_mem; *members != NULL; ++members) |
| printf (" %s\n", *members); |
| } |
| } |
| |
| return my_passwd && my_group ? EXIT_SUCCESS : EXIT_FAILURE; |
| } |