Store RUN_LVL in UTMP and change RUNLEVEL_BOOT from 10 to 0

Standard init implementations save current and previous runlevels
in utmp, now finit does too.  Also, the initial runlevel at boot
has changed from 10 to the more obvious 0.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

conf.c

@@ -71,10 +71,10 @@ int parse_runlevels(char *runlevels)
 		}
 
 		if ('s' == lvl || 'S' == lvl)
-			lvl = ':'; /* RUNLEVEL_BOOT */
+			lvl = '0';
 
 		level = lvl - '0';
-		if (level > RUNLEVEL_BOOT || level < 0)
+		if (level > 9 || level < 0)
 			continue;
 
 		if (not)

finit.c

@@ -39,9 +39,9 @@
 
 int   debug     = 0;
 int   verbose   = 1;
-int   runlevel  = RUNLEVEL_BOOT; /* Bootstrap */
-int   cfglevel  = RUNLEVEL;	 /* Fallback if no configured runlevel */
-int   prevlevel = 0;		 /* HALT */
+int   runlevel  = 0;		/* Bootstrap */
+int   cfglevel  = RUNLEVEL;	/* Fallback if no configured runlevel */
+int   prevlevel = 0;		/* HALT */
 char *sdown     = NULL;
 char *network   = NULL;
 char *username  = NULL;

sig.c

@@ -110,7 +110,7 @@ static void sigstop_handler(int sig, siginfo_t *info, void *UNUSED(ctx))
 	_d("Received SIGSTOP(%d) from %s (PID %d)",
 	   sig, pid_get_name(info->si_pid, NULL, 0), info->si_pid);
 	touch(SYNC_STOPPED);
-	stopped ++;
+	stopped++;
 }
 static void sigcont_handler(int sig, siginfo_t *info, void *UNUSED(ctx))
 {

svc.c

@@ -24,6 +24,7 @@
 
 #include <string.h>
 #include <sys/wait.h>
+#include <utmp.h>
 
 #include "finit.h"
 #include "helpers.h"
@@ -141,6 +142,25 @@ void svc_bootstrap(void)
 	}
 }
 
+static void utmp_save(int pre, int now)
+{
+   struct utmp utent;
+
+   int encode(int lvl)
+   {
+	   if (!lvl) return 0;
+	   return lvl + '0';
+   }
+
+   utent.ut_type  = RUN_LVL;
+   utent.ut_pid   = (encode(pre) << 8) | (encode(now) & 0xFF);
+   strlcpy(utent.ut_user, "runlevel", sizeof(utent.ut_user));
+
+   setutent();
+   pututline(&utent);
+   endutent();
+}
+
 /**
  * svc_runlevel - Change to a new runlevel
  * @newlevel: New runlevel to activate
@@ -159,7 +179,8 @@ void svc_runlevel(int newlevel)
 		return;
 
 	prevlevel = runlevel;
-	runlevel = newlevel;
+	runlevel  = newlevel;
+	utmp_save(prevlevel, newlevel);
 
 	for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
 		int run = svc_enabled(svc, 0, NULL);
@@ -187,7 +208,7 @@ void svc_runlevel(int newlevel)
 	else
 		remove("/etc/nologin");
 
-	if (RUNLEVEL_BOOT != prevlevel)
+	if (0 != prevlevel)
 		tty_runlevel(runlevel);
 }
 

svc.h

@@ -42,7 +42,6 @@ typedef enum {
 	SVC_CMD_RUN		/* Like task, but wait for completion */
 } svc_type_t;
 
-#define RUNLEVEL_BOOT    10
 #define FINIT_SHM_ID     0x494E4954  /* "INIT", see ascii(7) */
 #define MAX_ARG_LEN      64
 #define MAX_STR_LEN      64