busybox/coreutils/logname.c
Erik Andersen 9b7d964581 My little adventure of analyzing lib usage has already rooted out
a big "P" Policy violator -- logname was using getlogin(3), which uses
utmp under the hood.  We don't need no stinkin' utmp (and if we
are using tinylogin, it is unlikely to be useful trying).
 -Erik
2000-05-01 19:49:20 +00:00

45 lines
1.2 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Mini logname 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>
static const char logname_usage[] = "logname\n\n"
"Print the name of the current user.\n";
extern int logname_main(int argc, char **argv)
{
char *user = xmalloc(9);
if (argc > 1)
usage(logname_usage);
my_getpwuid(user, geteuid());
if (user) {
puts(user);
exit(TRUE);
}
fprintf(stderr, "no login name\n");
exit(FALSE);
}