*
* Copyright (C) 2000 Edward Betts <edward@debian.org>.
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
-/* 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().
* correct course of action wrt SUSv3 for a failing getlogin() is
* a diagnostic message and an error return.
*/
+//config:config LOGNAME
+//config: bool "logname (894 bytes)"
+//config: default y
+//config: help
+//config: logname is used to print the current user's login name.
+
+//applet:IF_LOGNAME(APPLET_NOFORK(logname, logname, BB_DIR_USR_BIN, BB_SUID_DROP, logname))
+
+//kbuild:lib-$(CONFIG_LOGNAME) += logname.o
+
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/logname.html */
+
+//usage:#define logname_trivial_usage
+//usage: ""
+//usage:#define logname_full_usage "\n\n"
+//usage: "Print the name of the current user"
+//usage:
+//usage:#define logname_example_usage
+//usage: "$ logname\n"
+//usage: "root\n"
+
+#include "libbb.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include "busybox.h"
+/* This is a NOFORK applet. Be very careful! */
-extern int logname_main(int argc, char ATTRIBUTE_UNUSED **argv)
+int logname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int logname_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
- const char *p;
+ char buf[64];
- if (argc > 1) {
+ if (argv[1]) {
bb_show_usage();
}
- if ((p = getlogin()) != NULL) {
- puts(p);
- bb_fflush_stdout_and_exit(EXIT_SUCCESS);
+ /* Using _r function - avoid pulling in static buffer from libc */
+ if (getlogin_r(buf, sizeof(buf)) == 0) {
+ puts(buf);
+ return fflush_all();
}
bb_perror_msg_and_die("getlogin");