1 | #include <grp.h> |
2 | #include <pwd.h> |
3 | #include <sys/types.h> |
4 | #include <unistd.h> |
5 | #include <stdlib.h> |
6 | #include <stdio.h> |
7 | |
8 | int |
9 | main (int argc, char *argv[]) |
10 | { |
11 | uid_t me; |
12 | struct passwd *my_passwd; |
13 | struct group *my_group = NULL; |
14 | char **members; |
15 | |
16 | me = getuid (); |
17 | my_passwd = getpwuid (uid: me); |
18 | if (my_passwd == NULL) |
19 | printf (format: "Cannot find user entry for UID %d\n" , me); |
20 | else |
21 | { |
22 | printf (format: "My login name is %s.\n" , my_passwd->pw_name); |
23 | printf (format: "My uid is %d.\n" , (int)(my_passwd->pw_uid)); |
24 | printf (format: "My home directory is %s.\n" , my_passwd->pw_dir); |
25 | printf (format: "My default shell is %s.\n" , my_passwd->pw_shell); |
26 | |
27 | my_group = getgrgid (gid: my_passwd->pw_gid); |
28 | if (my_group == NULL) |
29 | printf (format: "No data for group %d found\n" , my_passwd->pw_gid); |
30 | else |
31 | { |
32 | printf (format: "My default group is %s (%d).\n" , |
33 | my_group->gr_name, (int)(my_passwd->pw_gid)); |
34 | printf (format: "The members of this group are:\n" ); |
35 | for (members = my_group->gr_mem; *members != NULL; ++members) |
36 | printf (format: " %s\n" , *members); |
37 | } |
38 | } |
39 | |
40 | return my_passwd && my_group ? EXIT_SUCCESS : EXIT_FAILURE; |
41 | } |
42 | |