Patch from Shaun Jackman to set environment variable RUNLEVEL equal to

init's argv[1], so if you append "single" to your kernel command line and
the kernel doesn't parse it, RUNLELEL=single.

Plus a few unrelated header cleanups while I was in the area...

1 files changed, 3 insertions, 19 deletions

diff --git a/init/init.c b/init/init.c
index 877b08122..c9200bd6c 100644
--- a/init/init.c
+++ b/init/init.c
@@ -10,35 +10,19 @@
  */
 
 #include "busybox.h"
-#include <stdio.h>
-#include <stdlib.h>
 #include <errno.h>
 #include <paths.h>
 #include <signal.h>
-#include <stdarg.h>
-#include <string.h>
-#include <termios.h>
-#include <unistd.h>
-#include <limits.h>
-#include <fcntl.h>
 #include <sys/ioctl.h>
-#include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/reboot.h>
 
 #include "init_shared.h"
 
-
 #ifdef CONFIG_SYSLOGD
 # include <sys/syslog.h>
 #endif
 
-
-#ifdef CONFIG_SELINUX
-# include <selinux/selinux.h>
-#endif /* CONFIG_SELINUX */
-
-
 #define INIT_BUFFS_SIZE 256
 
 /* From <linux/vt.h> */
@@ -72,7 +56,6 @@ struct serial_struct {
         int     reserved[1];
 };
 
-
 #ifndef _PATH_STDPATH
 #define _PATH_STDPATH   "/usr/bin:/bin:/usr/sbin:/sbin"
 #endif
@@ -88,8 +71,6 @@ struct serial_struct {
 #include <sys/resource.h>
 #endif
 
-#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
-
 #define INITTAB      "/etc/inittab"     /* inittab file location */
 #ifndef INIT_SCRIPT
 #define INIT_SCRIPT  "/etc/init.d/rcS"  /* Default sysinit script. */
@@ -1046,6 +1027,9 @@ int init_main(int argc, char **argv)
                 for(e = environment; *e; e++)
                         putenv((char *) *e);
         }
+
+        if (argc > 1) setenv("RUNLEVEL", argv[1], 1);
+
         /* Hello world */
         message(MAYBE_CONSOLE | LOG, "init started:  %s", bb_msg_full_version);