halt.patch

--- kinit/Makefile.fix6	2010-06-01 17:39:37.000000000 +0400
+++ kinit/Makefile	2010-06-01 17:40:23.000000000 +0400
@@ -15,8 +15,9 @@ subdirs += fstype
 subdirs += resume
 subdirs += md_run
 subdirs += replace
 subdirs += showenv
+subdirs += halt
 
 # Additional include paths files
 CFLAGS +=  -I$(srctree)/$(src)/fstype \
            -I$(srctree)/$(src)/ipconfig \
--- /dev/null	2010-05-31 14:10:14.991006661 +0400
+++ kinit/halt/Makefile	2010-06-01 17:41:49.000000000 +0400
@@ -0,0 +1,4 @@
+prog =  halt
+objs = halt.o
+
+include $(CURDIR)/../rules.mk
--- /dev/null	2010-05-31 14:10:14.991006661 +0400
+++ kinit/halt/halt.c	2010-06-01 17:37:39.000000000 +0400
@@ -0,0 +1,57 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <linux/reboot.h>
+
+static usage(void)
+{
+	static char mesg[] = "Usage: {halt|reboot|poweroff} [-n]\n";
+	write(2, mesg, sizeof(mesg) - 1);
+	exit(1);
+}
+
+int main(int argc, char *argv[])
+{
+	int cmd = 0; /* initalize to shut gcc up */
+	int do_sync = 1;
+	char *ptr, *ptr2;
+
+	/* Which action (program name)? */
+	ptr2 = ptr = argv[0];
+	while (*ptr2)
+		if (*ptr2++ == '/')
+			ptr = ptr2;
+	if (*ptr == 'r')
+		cmd = LINUX_REBOOT_CMD_RESTART;
+	else if (*ptr == 'h')
+		cmd = LINUX_REBOOT_CMD_HALT;
+	else if (*ptr == 'p')
+		cmd = LINUX_REBOOT_CMD_POWER_OFF;
+	else
+		usage();
+
+	/* Walk options */
+	while (*++argv && **argv == '-')
+		switch (*++*argv) {
+		case 'f':
+			break; /* -f assumed */
+		case 'n':
+			do_sync = 0;
+			break;
+		default:
+			usage();
+		}
+	if (*argv)
+		usage(); /* any args == error */
+
+	if (do_sync)
+		sync();
+	reboot(LINUX_REBOOT_CMD_CAD_OFF); /* Enable CTRL+ALT+DEL */
+	if (!reboot(cmd)) {
+		/* Success. Currently, CMD_HALT returns, so stop the world */
+		/* kill(-1, SIGSTOP); */
+		kill(getpid(), SIGSTOP);
+	}
+	write(2, "failed.\n", 8);
+	return 1;
+}