mirror of
https://git.busybox.net/busybox.git
synced 2024-12-12 06:53:26 +08:00
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/*
|
|
* Mini whoami implementation for busybox
|
|
*
|
|
* Copyright (C) 2000 Edward Betts <edward@debian.org>.
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include "internal.h"
|
|
#include <stdio.h>
|
|
#include <pwd.h>
|
|
|
|
static const char whoami_usage[] = "whoami\n\n"
|
|
"Print the user name associated with the current effective user id.\n"
|
|
"Same as id -un.\n";
|
|
|
|
extern int whoami_main(int argc, char **argv) {
|
|
struct passwd *pw;
|
|
uid_t uid;
|
|
|
|
if (argc > 1) usage (whoami_usage);
|
|
|
|
uid = geteuid ();
|
|
pw = getpwuid (uid);
|
|
if (pw) {
|
|
puts (pw->pw_name);
|
|
exit (TRUE);
|
|
}
|
|
fprintf (stderr, "%s: cannot find username for UID %u\n", argv[0], (unsigned) uid);
|
|
exit (FALSE);
|
|
}
|