hush: do not accept "if() { echo; }" function def

[oweals/busybox.git] / miscutils / runlevel.c

diff --git a/miscutils/runlevel.c b/miscutils/runlevel.c
index 23714f7c7f29f2c991c2d99389f1a8831147d8d6..6b4742255e2e9b39d7d0cf6172df1613898400e9 100644 (file)
--- 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;
 }