*
* 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
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/logname.html */
+
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
+ * SUSv3 specifies the string used is that returned from getlogin().
+ * The previous implementation used getpwuid() for geteuid(), which
+ * is _not_ the same. Erik apparently made this change almost 3 years
+ * ago to avoid failing when no utmp was available. However, the
+ * correct course of action wrt SUSv3 for a failing getlogin() is
+ * a diagnostic message and an error return.
*/
-#include "busybox.h"
#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "busybox.h"
-extern int logname_main(int argc, char **argv)
+int logname_main(int argc, char ATTRIBUTE_UNUSED **argv)
{
- char user[9];
+ const char *p;
- if (argc > 1)
- usage(logname_usage);
+ if (argc > 1) {
+ bb_show_usage();
+ }
- my_getpwuid(user, geteuid());
- if (*user) {
- puts(user);
- return EXIT_SUCCESS;
+ if ((p = getlogin()) != NULL) {
+ puts(p);
+ bb_fflush_stdout_and_exit(EXIT_SUCCESS);
}
- error_msg_and_die("no login name\n");
+
+ bb_perror_msg_and_die("getlogin");
}