mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 22:00:08 +00:00
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/* User and Group Database Example
|
|
Copyright (C) 1991-2024 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#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;
|
|
}
|