From d1f76c9546758611bcadd6ad10fc0c4c1ceb14ee Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Sun, 10 Jun 2012 19:05:38 +0200
Subject: [PATCH] Port mdstart patch from busybox 1.19.3 to 1.20.1

---
 include/applets.src.h |    1 +
 util-linux/Config.src |    7 ++++++
 util-linux/Kbuild.src |    1 +
 util-linux/mdStart.c  |   66 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 75 insertions(+)
 create mode 100644 util-linux/mdStart.c

diff --git a/include/applets.src.h b/include/applets.src.h
index 252a060..0b199bc 100644
--- a/include/applets.src.h
+++ b/include/applets.src.h
@@ -239,6 +239,7 @@ IF_MAKEMIME(APPLET(makemime, BB_DIR_BIN, BB_SUID_DROP))
 IF_MAN(APPLET(man, BB_DIR_SBIN, BB_SUID_DROP))
 IF_MATCHPATHCON(APPLET(matchpathcon, BB_DIR_USR_SBIN, BB_SUID_DROP))
 IF_MD5SUM(APPLET_NOEXEC(md5sum, md5_sha1_sum, BB_DIR_USR_BIN, BB_SUID_DROP, md5sum))
+IF_MDSTART(APPLET(mdstart, BB_DIR_SBIN, BB_SUID_DROP))
 IF_MICROCOM(APPLET(microcom, BB_DIR_USR_BIN, BB_SUID_DROP))
 IF_MKDIR(APPLET_NOFORK(mkdir, mkdir, BB_DIR_BIN, BB_SUID_DROP, mkdir))
 IF_MKFS_VFAT(APPLET_ODDNAME(mkdosfs, mkfs_vfat, BB_DIR_SBIN, BB_SUID_DROP, mkfs_vfat))
diff --git a/util-linux/Config.src b/util-linux/Config.src
index 57a52ce..e07fe2b 100644
--- a/util-linux/Config.src
+++ b/util-linux/Config.src
@@ -404,6 +404,13 @@ config LSUSB
 
 	  This version uses sysfs (/sys/bus/usb/devices) only.
 
+config MDSTART
+	bool "mdstart"
+	default n
+	help
+	  Allows you to autostart /dev/md devices if using an initramfs to
+	  boot.
+
 config MKSWAP
 	bool "mkswap"
 	default y
diff --git a/util-linux/Kbuild.src b/util-linux/Kbuild.src
index 468fc6b..0bc9a9b 100644
--- a/util-linux/Kbuild.src
+++ b/util-linux/Kbuild.src
@@ -24,6 +24,7 @@ lib-$(CONFIG_HWCLOCK)           += hwclock.o
 lib-$(CONFIG_IPCRM)             += ipcrm.o
 lib-$(CONFIG_IPCS)              += ipcs.o
 lib-$(CONFIG_LOSETUP)           += losetup.o
+lib-$(CONFIG_MDSTART)           += mdStart.o
 lib-$(CONFIG_LSPCI)             += lspci.o
 lib-$(CONFIG_LSUSB)             += lsusb.o
 lib-$(CONFIG_MKFS_EXT2)         += mkfs_ext2.o
diff --git a/util-linux/mdStart.c b/util-linux/mdStart.c
new file mode 100644
index 0000000..0c55bab
--- /dev/null
+++ b/util-linux/mdStart.c
@@ -0,0 +1,66 @@
+/*
+ * Linux 2.6(+) RAID Autostarter
+ *
+ * Copyright (C) 2005 by Tim Yamin <plasmaroo@gentoo.org> <plasm@roo.me.uk>
+ * Copyright (C) 2012 by Sebastian Pipping <sebastian@pipping.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+//usage:#define mdstart_trivial_usage
+//usage:	"[PARTITION] MD-NODE [[PARTITION] MD-NODE ...]"
+//usage:
+//usage:#define mdstart_full_usage "\n\n"
+//usage:	"Run the RAID_AUTORUN ioctl on the given MD number"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/major.h>
+#include <linux/raid/md_u.h>
+
+extern int
+mdstart_main(int argc, char *argv[])
+{
+	int i, fd, part = 0, retval = 0;
+
+	if(argc < 2)
+	{
+		bb_show_usage();
+	}
+
+	for(i = 1; i < argc; i++)
+	{
+		if(sscanf(argv[i], "%d", &part) == 1)
+			continue;
+
+		fd = open(argv[i], 0, 0);
+		if (fd >= 0)
+		{
+			ioctl(fd, RAID_AUTORUN, part);
+			close(fd);
+		} else
+		{
+			printf("Error: Failed to open %s!\n", argv[i]);
+			retval=1;
+		}
+
+		part = 0;
+	}
+
+	return retval;
+}
-- 
1.7.10.2