hexedit: optimize output buffering

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

diff --git a/miscutils/runlevel.c b/miscutils/runlevel.c
index 7024361e780c97d4a0b9dc6df4319cccea765293..0b2098564595d178518aec9ef1240fe3bad8df7a 100644 (file)
--- a/miscutils/runlevel.c
+++ b/miscutils/runlevel.c
@@ -11,24 +11,50 @@
  *
  * 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.
+
+//applet:IF_RUNLEVEL(APPLET_NOEXEC(runlevel, runlevel, BB_DIR_SBIN, BB_SUID_DROP, runlevel))
+
+//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 (argv[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);
                        if (ENABLE_FEATURE_CLEAN_UP)
-                               endutent();
+                               endutxent();
                        return 0;
                }
        }
@@ -36,6 +62,6 @@ int runlevel_main(int argc UNUSED_PARAM, char **argv)
        puts("unknown");
 
        if (ENABLE_FEATURE_CLEAN_UP)
-               endutent();
+               endutxent();
        return 1;
 }