From 93bf318e5114233f3cacc4575ab2e58d60e785c7 Mon Sep 17 00:00:00 2001
From: Brad House <brad_mssw@gentoo.org>
Date: Sat, 14 Feb 2004 16:21:59 +0000
Subject: [PATCH] initrd updates for correctness, squashfs, and gcloop

git-svn-id: svn+ssh://svn.gentoo.org/var/svnroot/genkernel/trunk@73 67a159dc-881f-0410-a524-ba9dfbe2cb84
---
 generic/linuxrc | 84 +++++++++++++++++++++++++++++++++++--------------
 1 file changed, 61 insertions(+), 23 deletions(-)

diff --git a/generic/linuxrc b/generic/linuxrc
index 6027bdc..0cf93c5 100644
--- a/generic/linuxrc
+++ b/generic/linuxrc
@@ -79,7 +79,7 @@ then
 	mount -t tmpfs tmpfs /newroot
 	mkdir /newroot/dev /newroot/mnt /newroot/mnt/cdrom /newroot/mnt/livecd /newroot/tmp /newroot/tmp/.initrd /newroot/mnt/gentoo
 	[ ! -e /newroot/dev/.devfsd ] && mount -t devfs devfs /newroot/dev
-	devfsd /newroot/dev
+	devfsd /newroot/dev -np
 	sleep 1
 
 	findcdmount /newroot/dev/cdroms/*
@@ -96,7 +96,7 @@ then
 		exec /bin/ash
 
 		# Undo stuff		
-		kill_devfsd
+		# kill_devfsd # We run devfsd with -np now
 		sleep 1
 		umount /newroot/dev/
 		sleep 1
@@ -112,7 +112,7 @@ fi
 if [ "${CDROOT}" -eq "0" -a "${USE_DEVFS_NORMAL}" -eq "1" ]
 then
 	[ ! -e /dev/.devfsd ] && mount -t devfs devfs /dev
-	devfsd /dev
+	devfsd /dev -np
 fi
 
 echo "STEP 4: Determining root device"
@@ -194,6 +194,12 @@ then
 		elif [ "${LOOP}" = "/zisofs" ]
 		then
 			LOOPTYPE="zisofs"
+		elif [ "${LOOP}" = "/livecd.squashfs" ]
+		then
+			LOOPTYPE="squashfs"
+		elif [ "${LOOP}" = "/livecd.gcloop" ]
+		then
+			LOOPTYPE="gcloop"
 		else
 			LOOPTYPE="noloop"
 		fi
@@ -216,6 +222,33 @@ then
 		fi
 		FS_LOCATION="mnt/livecd"
 		umount /dev
+	elif [ "${LOOPTYPE}" = "squashfs" ]
+	then
+		check_loop
+		mount -o bind /newroot/dev /dev
+		echo "STEP 5a1: mounting squashfs filesystem"
+		mount -t squashfs -o loop,ro /newroot/mnt/cdrom/${LOOP} /newroot/mnt/livecd
+		if [ "$?" != "0" ]
+		then
+			echo "FAILED TO MOUNT LOOP FILESYSTEM, barfing out to shell"
+			/bin/ash
+		fi
+		FS_LOCATION="mnt/livecd"
+		umount /dev
+	elif [ "${LOOPTYPE}" = "gcloop" ]
+	then
+		check_loop
+		mount -o bind /newroot/dev /dev
+		echo "STEP 5a1: mounting gcloop (ext2) filesystem"
+		echo " " | losetup -e ucl-0 /newroot/dev/loop0 /newroot/mnt/cdrom/${LOOP}
+		if [ "$?" != "0" ]
+		then
+			echo "FAILED TO losetup THE LOOP DEVICE"
+			/bin/ash
+		fi
+		mount -t ext2 -o ro /newroot/dev/loop0 /newroot/mnt/livecd
+		FS_LOCATION="mnt/livecd"
+		umount /dev
 	elif [ "${LOOPTYPE}" = "zisofs" ]
 	then
 		check_loop
@@ -233,37 +266,29 @@ then
 	mkdir initrd proc tmp sys
 	chmod 1777 tmp
 	(cd /newroot/${FS_LOCATION}; cp -a ${ROOT_TREES} /newroot)
-	
-	# Unmount the -o bind /dev and kill devfsd
-#	umount /dev
-	kill_devfsd
 else
 	echo "STEP 5b: setting up stuff for pivot_root"
 	mkdir -p /newroot/tmp/.initrd
 fi
 
+echo "STEP 5c: redirect console"
+console=/newroot/dev/console
+exec < $console > $console 2>&1 || echo "CONSOLE REDIRECTION FAILED, /dev ON ROOT DOES NOT CONTAIN console !!!"
+
 echo "STEP 6: pivot_root and exec/chroot real init"
 
 
 cd /newroot
 pivot_root . tmp/.initrd
 
-# We cannot use  if [ this = that ]  after a pivot_root as 
-# an old version of coreutils in real_root does not support
-# that style, noted by Weeve
-# Well, changed it back to using [ ] for 3.0.1_beta10 too many
-# people reporting with newer binutils that using 'test' does
-# not work for some reason
-
 if [ "${USE_DEVFS_NORMAL}" -eq "1" -a "${CDROOT}" -eq "0" ]
 then
 	# must mount a new devfs before we can
 	# umount the old one for some reason
 	mount -t proc proc /proc
 	mount -t devfs devfs /dev
-	kill_devfsd
-	umount /tmp/.initrd/proc
-	umount /tmp/.initrd/dev
+	umount /tmp/.initrd/proc || echo "COULD NOT UMOUNT tmp/.initrd/proc !!!"
+	umount /tmp/.initrd/dev || echo "COULD NOT UMOUNT tmp/.initrd/dev !!!"
 
 	# Uhh, initrd is wasting memory ... let's
 	# kill the sucker here and now!
@@ -281,16 +306,29 @@ then
 	# also umount proc
 	echo "STEP 6a: clean up mounts"
 	sleep 1
-	umount /tmp/.initrd/dev > /dev/null 2>&1
+	umount /tmp/.initrd/dev || echo "COULD NOT UMOUNT tmp/.initrd/dev !!!"
 	sleep 1
-	umount /tmp/.initrd/proc > /dev/null 2>&1
+	umount /tmp/.initrd/proc || echo "COULD NOT UMOUNT tmp/.initrd/proc !!!"
 	sleep 1
 fi
 
-# why chroot ??  /usr/src/linux/Documentation/initrd.txt 
-# says to, but I see no reason to do this .... very odd...
+# /usr/src/linux/Documentation/initrd.txt 
 # here's the line it says we should do:
 #       exec chroot . /sbin/init </dev/console >/dev/console 2>&1
-# not gonna though ....
-exec chroot . /sbin/init ${CMDLINE} < /dev/console > /dev/console 2>&1
 
+exec chroot . /bin/sh <<- EOF
+	echo "UMOUNTING /tmp/.initrd"
+	umount /tmp/.initrd || echo "UMOUNT of /tmp/.initrd FAILED!!!" && /sbin/blockdev --flushbufs /dev/ram0
+	echo "INIT: starting /sbin/init ${CMDLINE}"
+	exec /sbin/init ${CMDLINE}
+EOF
+
+# exec chroot . /sbin/init ${CMDLINE} < /dev/console > /dev/console 2>&1
+echo "IF YOU ARE SEEING THIS MESSAGE, A FATAL ERROR HAS OCCURRED"
+echo "MOST LIKELY /sbin/init DOES NOT EXIST, ATTEMPTING TO DROP"
+echo "YOU TO A SHELL"
+
+exec /bin/bash
+exec /bin/sh
+exec /bin/ash
+exec sh
-- 
2.26.2