X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=miscutils%2Frunlevel.c;h=6b4742255e2e9b39d7d0cf6172df1613898400e9;hb=39701204cfa0f261beb2dc056024634e4c3afd71;hp=23714f7c7f29f2c991c2d99389f1a8831147d8d6;hpb=06af2165288cd6516b89001ec9e24992619230e0;p=oweals%2Fbusybox.git

diff --git a/miscutils/runlevel.c b/miscutils/runlevel.c
index 23714f7c7..6b4742255 100644
--- a/miscutils/runlevel.c
+++ b/miscutils/runlevel.c
@@ -1,43 +1,67 @@
 /* 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;
 }