1 files changed, 100 insertions, 0 deletions
diff --git a/init/halt.c b/init/halt.c
new file mode 100644
index 0000000..e852b87
--- /dev/null
+++ b/init/halt.c
@@ -0,0 +1,100 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Poweroff reboot and halt, oh my.
+ *
+ * Copyright 2006 by Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+#include <sys/reboot.h>
+
+#if ENABLE_FEATURE_WTMP
+#include <sys/utsname.h>
+#include <utmp.h>
+
+static void write_wtmp(void)
+{
+	struct utmp utmp;
+	struct utsname uts;
+	if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
+		close(creat(bb_path_wtmp_file, 0664));
+	}
+	memset(&utmp, 0, sizeof(utmp));
+	utmp.ut_tv.tv_sec = time(NULL);
+	safe_strncpy(utmp.ut_user, "shutdown", UT_NAMESIZE);
+	utmp.ut_type = RUN_LVL;
+	safe_strncpy(utmp.ut_id, "~~", sizeof(utmp.ut_id));
+	safe_strncpy(utmp.ut_line, "~~", UT_LINESIZE);
+	if (uname(&uts) == 0)
+		safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
+	updwtmp(bb_path_wtmp_file, &utmp);
+
+}
+#else
+#define write_wtmp() ((void)0)
+#endif
+
+#ifndef RB_HALT_SYSTEM
+#define RB_HALT_SYSTEM RB_HALT
+#endif
+
+#ifndef RB_POWER_OFF
+#define RB_POWER_OFF RB_POWERDOWN
+#endif
+
+int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int halt_main(int argc UNUSED_PARAM, char **argv)
+{
+	static const int magic[] = {
+		RB_HALT_SYSTEM,
+		RB_POWER_OFF,
+		RB_AUTOBOOT
+	};
+	static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
+
+	int delay = 0;
+	int which, flags, rc;
+
+	/* Figure out which applet we're running */
+	for (which = 0; "hpr"[which] != applet_name[0]; which++)
+		continue;
+
+	/* Parse and handle arguments */
+	opt_complementary = "d+"; /* -d N */
+	/* We support -w even if !ENABLE_FEATURE_WTMP, in order
+	 * to not break scripts */
+	flags = getopt32(argv, "d:nfw", &delay);
+
+	sleep(delay);
+
+	write_wtmp();
+
+	if (flags & 8) /* -w */
+		return EXIT_SUCCESS;
+
+	if (!(flags & 2)) /* no -n */
+		sync();
+
+	/* Perform action. */
+	rc = 1;
+	if (!(flags & 4)) { /* no -f */
+//TODO: I tend to think that signalling linuxrc is wrong
+// pity original author didn't comment on it...
+		if (ENABLE_FEATURE_INITRD) {
+			pid_t *pidlist = find_pid_by_name("linuxrc");
+			if (pidlist[0] > 0)
+				rc = kill(pidlist[0], signals[which]);
+			if (ENABLE_FEATURE_CLEAN_UP)
+				free(pidlist);
+		}
+		if (rc)
+			rc = kill(1, signals[which]);
+	} else
+		rc = reboot(magic[which]);
+
+	if (rc)
+		bb_error_msg("no");
+	return rc;
+}