/* vi: set sw=4 ts=4: */
/*
- * runlevel Prints out the previous and the current runlevel.
+ * Prints out the previous and the current runlevel.
*
- * Version: @(#)runlevel 1.20 16-Apr-1997 MvS
+ * Version: @(#)runlevel 1.20 16-Apr-1997 MvS
*
- * This file is part of the sysvinit suite,
- * Copyright 1991-1997 Miquel van Smoorenburg.
+ * This file is part of the sysvinit suite,
+ * Copyright 1991-1997 Miquel van Smoorenburg.
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
- * initially busyboxified by Bernhard Fischer
+ * initially busyboxified by Bernhard Reutner-Fischer
*/
+//config:config RUNLEVEL
+//config: bool "runlevel (518 bytes)"
+//config: default y
+//config: depends on FEATURE_UTMP
+//config: help
+//config: find the current and previous system runlevel.
+//config:
+//config: This applet uses utmp but does not rely on busybox supporing
+//config: utmp on purpose. It is used by e.g. emdebian via /etc/init.d/rc.
-#include "busybox.h"
-#include <stdio.h>
-#include <utmp.h>
-#include <time.h>
-#include <stdlib.h>
+//applet:IF_RUNLEVEL(APPLET(runlevel, BB_DIR_SBIN, BB_SUID_DROP))
-int runlevel_main(int argc, char *argv[]);
-int runlevel_main(int argc, char *argv[])
+//kbuild:lib-$(CONFIG_RUNLEVEL) += runlevel.o
+
+//usage:#define runlevel_trivial_usage
+//usage: "[FILE]"
+//usage:#define runlevel_full_usage "\n\n"
+//usage: "Find the current and previous system runlevel\n"
+//usage: "\n"
+//usage: "If no utmp FILE exists or if no runlevel record can be found,\n"
+//usage: "print \"unknown\""
+//usage:
+//usage:#define runlevel_example_usage
+//usage: "$ runlevel /var/run/utmp\n"
+//usage: "N 2"
+
+#include "libbb.h"
+
+int runlevel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int runlevel_main(int argc UNUSED_PARAM, char **argv)
{
- struct utmp *ut;
+ struct utmpx *ut;
char prev;
- if (argc > 1) utmpname(argv[1]);
+ if (argv[1]) utmpxname(argv[1]);
- setutent();
- while ((ut = getutent()) != NULL) {
+ setutxent();
+ while ((ut = getutxent()) != NULL) {
if (ut->ut_type == RUN_LVL) {
prev = ut->ut_pid / 256;
if (prev == 0) prev = 'N';
printf("%c %c\n", prev, ut->ut_pid % 256);
- endutent();
+ if (ENABLE_FEATURE_CLEAN_UP)
+ endutxent();
return 0;
}
}
puts("unknown");
- endutent();
+
+ if (ENABLE_FEATURE_CLEAN_UP)
+ endutxent();
return 1;
}