Apply last_patch93 from vodz:

andersen@busybox.net wrote:
    >Message: 4
    >Modified Files:
    >       init.c
    >Log Message:
    >Remove code for unsupported kernel versions

    Hmm. Current init.c have check >= 2.2.0 kernel one time too.
    Ok. Last patch removed this point and move common init code to new file for
    /init dir

init/Makefile.in

@@ -33,6 +33,28 @@ INIT-$(CONFIG_POWEROFF)			+= poweroff.o
 INIT-$(CONFIG_REBOOT)			+= reboot.o
 INIT-$(CONFIG_START_STOP_DAEMON)	+= start_stop_daemon.o
 
+ifeq ($(CONFIG_HALT), y)
+CONFIG_INIT_SHARED=y
+else
+ifeq ($(CONFIG_INIT), y)
+CONFIG_INIT_SHARED=y
+else
+ifeq ($(CONFIG_POWEROFF), y)
+CONFIG_INIT_SHARED=y
+else
+ifeq ($(CONFIG_REBOOT), y)
+CONFIG_INIT_SHARED=y
+else
+CONFIG_INIT_SHARED=n
+endif
+endif
+endif
+endif
+
+ifeq ($(CONFIG_INIT_SHARED), y)
+INIT-$(CONFIG_INIT_SHARED)        += init_shared.o
+endif
+
 libraries-y+=$(INIT_DIR)$(INIT_AR)
 
 $(INIT_DIR)$(INIT_AR): $(patsubst %,$(INIT_DIR)%, $(INIT-y))

init/halt.c

@@ -23,19 +23,10 @@
 
 #include "busybox.h"
 #include <signal.h>
+#include "init_shared.h"
+
 
 extern int halt_main(int argc, char **argv)
 {
-#ifdef CONFIG_FEATURE_INITRD
+	return kill_init(SIGUSR1);
-	/* don't assume init's pid == 1 */
-	long *pid = find_pid_by_name("init");
-	if (!pid || *pid<=0) {
-		pid = find_pid_by_name("linuxrc");
-		if (!pid || *pid<=0)
-			bb_error_msg_and_die("no process killed");
-	}
-	return(kill(*pid, SIGUSR1));
-#else
-	return(kill(1, SIGUSR1));
-#endif
 }

init/init.c

@@ -43,6 +43,10 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include "busybox.h"
+
+#include "init_shared.h"
+
+
 #ifdef CONFIG_SYSLOGD
 # include <sys/syslog.h>
 #endif
@@ -152,7 +156,6 @@ struct init_action {
 
 /* Static variables */
 static struct init_action *init_action_list = NULL;
-static int kernelVersion;
 static char console[CONSOLE_BUFF_SIZE] = _PATH_CONSOLE;
 
 #ifndef CONFIG_SYSLOGD
@@ -764,7 +767,7 @@ static void halt_signal(int sig)
 	/* allow time for last message to reach serial console */
 	sleep(2);
 
-	if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2, 2, 0))
+	if (sig == SIGUSR2)
 		init_reboot(RB_POWER_OFF);
 	else
 		init_reboot(RB_HALT_SYSTEM);
@@ -1014,15 +1017,7 @@ extern int init_main(int argc, char **argv)
 	int status;
 
 	if (argc > 1 && !strcmp(argv[1], "-q")) {
-		/* don't assume init's pid == 1 */
+		return kill_init(SIGHUP);
-		long *pid = find_pid_by_name("init");
-
-		if (!pid || *pid <= 0) {
-			pid = find_pid_by_name("linuxrc");
-			if (!pid || *pid <= 0)
-				bb_error_msg_and_die("no process killed");
-		}
-		return kill(*pid, SIGHUP);
 	}
 #ifndef DEBUG_INIT
 	/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
@@ -1049,9 +1044,6 @@ extern int init_main(int argc, char **argv)
 	init_reboot(RB_DISABLE_CAD);
 #endif
 
-	/* Figure out what kernel this is running */
-	kernelVersion = get_kernel_revision();
-
 	/* Figure out where the default console should be */
 	console_init();
 

init/init_shared.c

@@ -0,0 +1,21 @@
+#include <signal.h>
+#include "busybox.h"
+
+#include "init_shared.h"
+
+
+extern int kill_init(int sig)
+{
+#ifdef CONFIG_FEATURE_INITRD
+	/* don't assume init's pid == 1 */
+	long *pid = find_pid_by_name("init");
+	if (!pid || *pid<=0) {
+		pid = find_pid_by_name("linuxrc");
+		if (!pid || *pid<=0)
+			bb_error_msg_and_die("no process killed");
+	}
+	return(kill(*pid, sig));
+#else
+	return(kill(1, sig));
+#endif
+}

init/init_shared.h

@@ -0,0 +1 @@
+extern int kill_init(int sig);

init/poweroff.c

@@ -26,16 +26,5 @@
 
 extern int poweroff_main(int argc, char **argv)
 {
-#ifdef CONFIG_FEATURE_INITRD
+	return kill_init(SIGUSR2);
-	/* don't assume init's pid == 1 */
-	long *pid = find_pid_by_name("init");
-	if (!pid || *pid<=0) {
-		pid = find_pid_by_name("linuxrc");
-		if (!pid || *pid<=0)
-			bb_error_msg_and_die("no process killed");
-	}
-	return(kill(*pid, SIGUSR2));
-#else
-	return(kill(1, SIGUSR2));
-#endif
 }

init/reboot.c

@@ -27,6 +27,8 @@
 #include <getopt.h>
 
 #include "busybox.h"
+#include "init_shared.h"
+
 
 #if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__) 
   #include <sys/reboot.h>
@@ -42,23 +44,11 @@ static const int RB_AUTOBOOT = 0x01234567;
 
 extern int reboot_main(int argc, char **argv)
 {
-	int delay = 0; /* delay in seconds before rebooting */
+	char *delay; /* delay in seconds before rebooting */
-	int rc;
 
-	while ((rc = getopt(argc, argv, "d:")) > 0) {
+	if(bb_getopt_ulflags(argc, argv, "d:", &delay)) {
-		switch (rc) {
+		sleep(atoi(delay));
-		case 'd':
-			delay = atoi(optarg);
-			break;
-
-		default:
-			bb_show_usage();
-			break;
 	}
-	}
-
-	if(delay > 0)
-		sleep(delay);
 
 #ifdef CONFIG_USER_INIT
 		/* Don't kill ourself */
@@ -83,29 +73,11 @@ extern int reboot_main(int argc, char **argv)
 		sleep(1);
 
 		sync();
-		if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
-			/* bdflush, kupdate not needed for kernels >2.2.11 */
-			bdflush(1, 0);
-			sync();
-		}
 
 		init_reboot(RB_AUTOBOOT);
-		exit(0); /* Shrug */
+		return 0; /* Shrug */
 #else
-#ifdef CONFIG_FEATURE_INITRD
+	return kill_init(SIGTERM);
-	{
-		/* don't assume init's pid == 1 */
-		long *pid = find_pid_by_name("init");
-		if (!pid || *pid<=0)
-			pid = find_pid_by_name("linuxrc");
-		if (!pid || *pid<=0)
-			bb_error_msg_and_die("no process killed");
-		fflush(stdout);
-		return(kill(*pid, SIGTERM));
-	}
-#else
-	return(kill(1, SIGTERM));
-#endif
 #endif
 }