1 files changed, 64 insertions, 0 deletions
diff --git a/usr/utils/halt.c b/usr/utils/halt.c
new file mode 100644
index 0000000..368f095
--- /dev/null
+++ b/usr/utils/halt.c
@@ -0,0 +1,64 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/reboot.h>
+#include <klibc/compiler.h>
+
+static __noreturn usage(void)
+{
+	static char mesg[] = "Usage: {halt|reboot|poweroff} [-n] [reboot-arg]\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;
+	char *reboot_arg = NULL;
+
+	/* 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)
+		if (**argv == '-') {
+			switch (*++*argv) {
+			case 'f':
+				break; /* -f assumed */
+			case 'n':
+				do_sync = 0;
+				break;
+			default:
+				usage();
+			}
+		} else if (cmd == LINUX_REBOOT_CMD_RESTART) {
+			reboot_arg = *argv;
+			cmd = LINUX_REBOOT_CMD_RESTART2;
+		} else {
+			usage(); /* args, not reboot == error */
+		}
+
+	if (do_sync)
+		sync();
+	reboot(LINUX_REBOOT_CMD_CAD_OFF, NULL); /* Enable CTRL+ALT+DEL */
+	if (!reboot(cmd, reboot_arg)) {
+		/* Success. Currently, CMD_HALT returns, so stop the world */
+		/* kill(-1, SIGSTOP); */
+		kill(getpid(), SIGSTOP);
+	}
+	write(2, "failed.\n", 8);
+	return 1;
+}