cmdline, linuxrc, Makefile

linuxrc

@@ -0,0 +1,90 @@
+#!/bin/sh
+
+QUITE=false
+
+log() {
+	if [ "X$QUITE" != "Xtrue" ]
+	then
+		echo "$*"
+	fi
+}
+
+err() {
+	echo "$*" >&2
+}
+
+if [ "x${1}x" != "x-rx" ]
+then
+	exec </dev/console >/dev/console 2>&1
+	log "### ISIRD ###"
+	PATH=/bin
+	cd /
+
+	log " mount proc and sysfs and / as rw"
+	mount -t proc proc /proc
+	mount -t sysfs sysfs /sys
+	mount -o remount,rw /
+
+	log " mdev"
+	mdev -s
+	log " activate volume groups"
+	vgscan --mknodes --ignorelockingfailure
+	vgchange --ignorelockingfailure -P -a y
+
+	if cmdline -c isirdsh
+	then
+		log " start shell"
+		exec sh
+	fi
+
+else
+	log " returned"
+fi
+
+log " detect cmdline options..."
+ROOT="$(cmdline -c root)"
+log "  root: #{ROOT}"
+FLAGS="$(cmdline -c rootflags)"
+log "  flags: ${FLAGS}"
+if cmdline -c ro
+then
+	FLAGS="${FLAGS},ro"
+elif cmdline -c rw
+then
+	FLAGS="${FLAGS},rw"
+fi
+log "  flags: ${FLAGS}"
+FSTYPE="$(cmdline -c rootfstype)"
+FSTYPE="${FSTYPE:-auto}"
+log " umount sysfs"
+umount /sys
+FLAGS="${FLAGS#,}"
+log " mount ${ROOT} as ${FSTYPE} with ${FLAGS}"
+if ! mount -o "${FLAGS}" -t "${FSTYPE}" "${ROOT}" /mnt
+then
+	err "Can't mount root!"
+	exec sh
+fi
+
+if ! test -d /mnt/initrd || mkdir /mnt/initrd
+then
+	err "/initrd doesn't exist on root!"
+	exec sh
+fi
+
+log " Change to new root"
+cd /mnt
+if ! pivot_root . initrd
+then
+	err "Can't pivot root!"
+	cd /
+	exec sh
+fi
+
+log " OK :)"
+export LD_LIBRARY_PATH="/initrd/lib"
+LD_SO="${LD_LIBRARY_PATH}/ld-linux.so.2"
+${LD_SO} /initrd/bin/ls /mnt/dev/*
+echo 0x0100 > /initrd/proc/sys/kernel/real-root-dev
+${LD_SO} /initrd/bin/umount -n /initrd/proc
+exit 0