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692 lines
16 KiB
692 lines
16 KiB
#!/bin/sh
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# Daniel Robbins <drobbins@gentoo.org>
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# Copyright 2003 Gentoo Technologies, Inc.
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# Distributed under the GPL
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. /etc/initrd.defaults
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. /etc/initrd.scripts
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splash() {
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return 0
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}
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[ -e /etc/initrd.splash ] && . /etc/initrd.splash
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# Clean input/output
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exec >${CONSOLE} <${CONSOLE} 2>&1
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if [ "$$" != '1' ]
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then
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echo '/linuxrc has to be run as the init process as the one'
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echo 'with a PID of 1. Try adding init="/linuxrc" to the'
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echo 'kernel command line or running "exec /linuxrc".'
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exit 1
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fi
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mount -o remount,rw /
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mount -t proc proc /proc
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# Set up symlinks
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if [ "$0" = '/init' ]
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then
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/bin/busybox --install -s
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[ -e /linuxrc ] && rm /linuxrc
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[ -e /sbin/udev ] && ln -s /sbin/udev /sbin/udevstart
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if [ -e /bin/lvm ]
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then
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ln -s /bin/lvm /bin/vgscan
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ln -s /bin/lvm /bin/vgchange
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fi
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fi
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quiet_kmsg
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CMDLINE="`cat /proc/cmdline`"
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# Scan CMDLINE for any specified real_root= or cdroot arguments
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REAL_ROOT=''
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for x in ${CMDLINE}
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do
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case "${x}" in
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real_root\=*)
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REAL_ROOT=`parse_opt "${x}"`
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;;
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subdir\=*)
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SUBDIR=`parse_opt "${x}"`
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;;
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real_init\=*)
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REAL_INIT=`parse_opt "${x}"`
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;;
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# Livecd options
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cdroot)
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CDROOT=1
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;;
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cdroot\=*)
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CDROOT=1
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CDROOT_DEV=`parse_opt "${x}"`
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;;
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# Start livecd loop and looptype options
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loop\=*)
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LOOP=`parse_opt "${x}"`
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;;
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looptype\=*)
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LOOPTYPE=`parse_opt "${x}"`
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;;
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# Start Device Manager options
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devfs)
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USE_DEVFS_NORMAL=1
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USE_UDEV_NORMAL=0
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;;
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udev)
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USE_DEVFS_NORMAL=0
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USE_UDEV_NORMAL=1
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;;
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unionfs)
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if [ ! -x /sbin/unionctl ]
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then
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USE_UNIONFS_NORMAL=0
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bad_msg 'Unionctl not found: aborting use of unionfs!'
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else
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USE_UNIONFS_NORMAL=1
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fi
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;;
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unionfs\=*)
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if [ ! -x /sbin/unionctl ]
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then
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USE_UNIONFS_NORMAL=0
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bad_msg 'Unionctl not found: aborting use of unionfs!'
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else
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USE_UNIONFS_NORMAL=1
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CMD_UNIONFS=`parse_opt "${x}"`
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echo ${CMD_UNIONFS}|grep , >/dev/null 2>&1
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if [ "$?" -eq '0' ]
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then
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UID=`echo ${CMD_UNIONFS#*,}`
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UNIONFS=`echo ${CMD_UNIONFS%,*}`
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else
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UNIONFS=${CMD_UNIONFS}
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fi
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fi
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;;
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# Start Volume manager options
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dolvm2)
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USE_LVM2_NORMAL=1
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;;
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dodmraid)
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USE_DMRAID_NORMAL=1
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;;
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dodmraid\=*)
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DMRAID_OPTS=`parse_opt "${x}"`
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USE_DMRAID_NORMAL=1
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;;
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doevms2)
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USE_EVMS2_NORMAL=1
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;;
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# Start Debug Option
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debug)
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DEBUG='yes'
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;;
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# Scandelay options
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scandelay\=*)
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SDELAY=`parse_opt "${x}"`
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;;
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scandelay)
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SDELAY=10
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;;
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# Module no-loads
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noload\=*)
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MLIST=`parse_opt "${x}"`
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MLIST="`echo ${MLIST} | sed -e \"s/,/ /\"`"
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export MLIST
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;;
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# Redirect output to a specific tty
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CONSOLE\=*)
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CONSOLE=`parse_opt "${x}"`
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exec >${CONSOLE} <${CONSOLE} 2>&1
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;;
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# /dev/md
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lvmraid\=*)
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RAID_DEVICES="${RAID_DEVICES} `parse_opt ${x}`"
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;;
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part\=*)
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MDPART=`parse_opt "${x}"`
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;;
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# NFS
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ip\=*)
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IP=`parse_opt "${x}"`
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;;
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nfsroot\=*)
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NFSROOT=`parse_opt "${x}"`
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;;
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esac
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done
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splash 'init'
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detect_sbp2_devices
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cmdline_hwopts
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# Load modules listed in MY_HWOPTS if /lib/modules exists
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if [ -d '/lib/modules' ]
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then
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good_msg 'Loading modules'
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# Load appropriate kernel modules
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for modules in $MY_HWOPTS
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do
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modules_scan $modules
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eval DO_`echo $modules | sed 's/-//'`=1
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done
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else
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for modules in $MY_HWOPTS
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do
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eval DO_`echo $modules | sed 's/-//'`=1
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done
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good_msg 'Skipping module load; no modules in the initrd!'
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fi
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# Mount sysfs
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mount_sysfs
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# Start udev/devfs
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start_dev_mgr
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# Setup md device nodes if they dont exist
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setup_md_device
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# Start EVMS
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startVolumes
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# Set up unionfs
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mkdir -p ${NEW_ROOT}
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setup_unionfs
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if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
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then
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CHROOT=${UNION}
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else
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CHROOT=${NEW_ROOT}
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fi
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# Run debug shell if requested
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rundebugshell
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if [ "${CDROOT}" -eq '1' ]
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then
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if [ ! "${USE_UNIONFS_NORMAL}" -eq '1' ]
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then
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good_msg "Making tmpfs for ${NEW_ROOT}"
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mount -t tmpfs tmpfs ${NEW_ROOT}
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fi
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for i in dev mnt mnt/cdrom mnt/livecd tmp tmp/.initrd mnt/gentoo sys
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do
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mkdir -p ${NEW_ROOT}/$i
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chmod 755 ${NEW_ROOT}/$i
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done
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cp /dev/null ${NEW_ROOT}/dev
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cp /dev/console ${NEW_ROOT}/dev
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# Required for gensplash to work. Not an issue with the initrd as this device isnt created there and is not needed.
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if [ -e /dev/tty1 ]
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then
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cp /dev/tty1 ${NEW_ROOT}/dev
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fi
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sdelay
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[ "${REAL_ROOT}" = "/dev/nfs" ] || bootstrapCD
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if [ "${REAL_ROOT}" = '' ]
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then
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echo -n -e "${WARN}>>${NORMAL}${BOLD} No bootable medium found. Waiting for new devices"
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COUNTER=0
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while [ $COUNTER -lt 3 ]; do
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sleep 3
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echo -n '.'
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let COUNTER=$COUNTER+1
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done
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sleep 1
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echo -e "${NORMAL}"
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bootstrapCD
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fi
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if [ "${REAL_ROOT}" = '' ]
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then
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# Undo stuff
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umount ${NEW_ROOT}/dev 2>/dev/null
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umount ${NEW_ROOT}/sys 2>/dev/null
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umount /sys 2>/dev/null
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umount ${NEW_ROOT}
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rm -rf ${NEW_ROOT}/*
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bad_msg 'Could not find CD to boot, something else needed!'
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CDROOT=0
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fi
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fi
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setup_keymap
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# Determine root device
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good_msg 'Determining root device...'
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while true
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do
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while [ "${got_good_root}" != '1' ]
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do
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case "${REAL_ROOT}" in
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LABEL\=*|UUID\=*)
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ROOT_DEV=""
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retval=1
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if [ "${retval}" -ne '0' ]; then
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ROOT_DEV=`findfs "${REAL_ROOT}" 2>/dev/null`
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retval=$?
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fi
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if [ "$retval" -ne '0' ]; then
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ROOT_DEV=`busybox findfs "${REAL_ROOT}" 2>/dev/null`
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retval=$?
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fi
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if [ "${retval}" -ne '0' ]; then
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ROOT_DEV=`blkid -t "${REAL_ROOT}" | cut -d ":" -f 1 2>/dev/null`
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retval=$?
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fi
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if [ "${retval}" -eq '0' ] && [ -n "${ROOT_DEV}" ]; then
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good_msg "Detected real_root=${ROOT_DEV}"
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REAL_ROOT="${ROOT_DEV}"
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else
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bad_msg "Could not find root block device: ${REAL_ROOT}"
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echo ' Please specify a device to boot, or "shell" for a shell...'
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echo -n 'boot() :: '
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read REAL_ROOT
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got_good_root=0
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continue
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fi
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;;
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esac
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if [ "${REAL_ROOT}" = 'shell' ]
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then
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run_shell
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REAL_ROOT=''
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got_good_root=0
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continue
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elif [ "${REAL_ROOT}" = '' ]
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then
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# No REAL_ROOT determined/specified. Prompt user for root block device.
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bad_msg "The root block device is unspecified or not detected."
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echo ' Please specify a device to boot, or "shell" for a shell...'
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echo -n 'boot() :: '
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read REAL_ROOT
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got_good_root=0
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# Check for a block device or /dev/nfs
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elif [ -b "${REAL_ROOT}" ] || [ "${REAL_ROOT}" = "/dev/nfs" ]
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then
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got_good_root=1
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else
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bad_msg "Block device ${REAL_ROOT} is not a valid root device..."
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REAL_ROOT=""
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got_good_root=0
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fi
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done
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if [ "${CDROOT}" -eq '1' -a "${got_good_root}" = '1' -a "${REAL_ROOT}" != "/dev/nfs" ]
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then
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# CD already mounted; no further checks necessary
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break
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else
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good_msg "Mounting root..."
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# Try to mount the device as ${NEW_ROOT}
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if [ "${REAL_ROOT}" = '/dev/nfs' ]; then
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findnfsmount
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else
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mount -o rw ${REAL_ROOT} ${NEW_ROOT}
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fi
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# If mount is successful break out of the loop
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# else not a good root and start over.
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if [ "$?" = '0' ]
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then
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break
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else
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bad_msg "Could not mount specified ROOT, try again"
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got_good_root=0
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REAL_ROOT=''
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fi
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fi
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done
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# End determine root device
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#verbose_kmsg
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# If cdroot is set determine the looptype to boot
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if [ "${CDROOT}" = '1' ]
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then
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good_msg 'Determining looptype ...'
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cd ${NEW_ROOT}
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# Find loop and looptype if we have NFS-mounted a livecd
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if [ "${LOOP}" = '' ] && [ "${REAL_ROOT}" = '/dev/nfs' ]
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then
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if [ -e "${NEW_ROOT}/mnt/cdrom/livecd.loop" ]; then
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LOOP='/livecd.loop'
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LOOPTYPE='normal'
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elif [ -e "${NEW_ROOT}/mnt/cdrom/zisofs" ]; then
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LOOP='/zisofs'
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LOOPTYPE='zisofs'
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elif [ -e "${NEW_ROOT}/mnt/cdrom/livecd.squashfs" ]; then
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LOOP='/livecd.squashfs'
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LOOPTYPE='squashfs'
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elif [ -e "${NEW_ROOT}/mnt/cdrom/livecd.gcloop" ]; then
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LOOP='/livecd.gcloop'
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LOOPTYPE='gcloop'
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else
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LOOPTYPE='noloop'
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fi
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fi
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# Failsafe the loop type wasn't set
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if [ "${LOOPTYPE}" = '' ]
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then
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warn_msg 'Warning: loop type unspecified!'
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if [ "${LOOP}" = '/livecd.loop' ]
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then
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LOOPTYPE='normal'
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elif [ "${LOOP}" = '/zisofs' ]
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then
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LOOPTYPE='zisofs'
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elif [ "${LOOP}" = '/livecd.squashfs' ]
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then
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LOOPTYPE='squashfs'
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elif [ "${LOOP}" = '/livecd.gcloop' ]
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then
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LOOPTYPE='gcloop'
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else
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LOOPTYPE='noloop'
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fi
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fi
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cache_cd_contents
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# Setup the loopback mounts
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if [ "${LOOPTYPE}" = 'normal' ]
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then
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good_msg 'Mounting loop filesystem'
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mount -t ext2 -o loop,ro ${NEW_ROOT}/mnt/cdrom/${LOOPEXT}${LOOP} ${NEW_ROOT}/mnt/livecd
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test_success 'Mount filesystem'
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FS_LOCATION='mnt/livecd'
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elif [ "${LOOPTYPE}" = 'squashfs' ]
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then
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good_msg 'Mounting squashfs filesystem'
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mount -t squashfs -o loop,ro ${NEW_ROOT}/mnt/cdrom/${LOOPEXT}${LOOP} ${NEW_ROOT}/mnt/livecd
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test_success 'Mount filesystem'
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FS_LOCATION='mnt/livecd'
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elif [ "${LOOPTYPE}" = 'gcloop' ]
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then
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good_msg 'Mounting gcloop filesystem'
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echo ' ' | losetup -E 19 -e ucl-0 -p0 ${NEW_ROOT}/dev/loop0 ${NEW_ROOT}/mnt/cdrom/${LOOPEXT}${LOOP}
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test_success 'losetup the loop device'
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mount -t ext2 -o ro ${NEW_ROOT}/dev/loop0 ${NEW_ROOT}/mnt/livecd
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test_success 'Mount the losetup loop device'
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FS_LOCATION='mnt/livecd'
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elif [ "${LOOPTYPE}" = 'zisofs' ]
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then
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FS_LOCATION="mnt/cdrom/${LOOPEXT}${LOOP}"
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elif [ "${LOOPTYPE}" = 'noloop' ]
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then
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FS_LOCATION='mnt/cdrom'
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fi
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#
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# End cdrom looptype determination and mounting if necessary
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#
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if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
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then
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union_insert_dir $UNION /${NEW_ROOT}/${FS_LOCATION}
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# Make sure fstab notes livecd is mounted ro. Makes system skip remount which fails on unionfs dirs.
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cat /${UNION}/etc/fstab | sed -e 's|\(.*\s/\s*tmpfs\s*\)defaults\(.*\)|\1defaults,ro\2|' > /${UNION}/etc/fstab
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fi
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# Unpacking additional packages from NFS mount
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# This is useful for adding kernel modules to /lib
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# We do this now, so that additional packages can add whereever they want.
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if [ "${REAL_ROOT}" = '/dev/nfs' ]
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then
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if [ -e "${CHROOT}/mnt/cdrom/add" ]
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then
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for targz in `ls ${CHROOT}/mnt/cdrom/add/*.tar.gz`
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do
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tarname=`basename ${targz}`
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good_msg "Adding additional package ${tarname}"
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(cd ${CHROOT} ; /bin/tar -xzf ${targz})
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done
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fi
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fi
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if [ ! "${USE_UNIONFS_NORMAL}" -eq '1' ]
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then
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good_msg "Copying read-write image contents to tmpfs"
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# Copy over stuff that should be writable
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(cd ${NEW_ROOT}/${FS_LOCATION}; cp -a ${ROOT_TREES} ${NEW_ROOT})
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# Now we do the links.
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for x in ${ROOT_LINKS}
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do
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if [ -L "${NEW_ROOT}/${FS_LOCATION}/${x}" ]
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then
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ln -s "`readlink ${NEW_ROOT}/${FS_LOCATION}/${x}`" "${x}" 2>/dev/null
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else
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# List all subdirectories of x
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for directory in `find "${NEW_ROOT}/${FS_LOCATION}/${x}" -type d 2>/dev/null`
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do
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## Strip the prefix of the FS_LOCATION
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directory=${directory#${NEW_ROOT}/${FS_LOCATION}/}
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## Skip this directory if we already linked a parent directory
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if [ "${curent_parrent}" != '' ]; then
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var=`echo "${directory}" | grep "^${curent_parrent}"`
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if [ "${var}" != '' ]; then
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continue
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fi
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fi
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## Test if the directory exists already
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if [ -e "/${NEW_ROOT}/${directory}" ]
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then
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# It does exist, link all the individual files
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for file in `ls /${NEW_ROOT}/${FS_LOCATION}/${directory}`
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do
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if [ ! -d "/${NEW_ROOT}/${FS_LOCATION}/${directory}/${file}" ] && [ ! -e "${NEW_ROOT}/${directory}/${file}" ]; then
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ln -s "/${FS_LOCATION}/${directory}/${file}" "${directory}/${file}" 2> /dev/null
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fi
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done
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else
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# It does not exist, make a link to the livecd
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ln -s "/${FS_LOCATION}/${directory}" "${directory}" 2>/dev/null
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current_parent=${directory}
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fi
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done
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fi
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done
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[ "${BLADECENTER}" -eq '1' ] && sleep 10
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mkdir initrd proc tmp sys 2>/dev/null
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chmod 1777 tmp
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fi
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#UML=`cat /proc/cpuinfo|grep UML|sed -e 's|model name.*: ||'`
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#if [ "${UML}" = 'UML' ]
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#then
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# # UML Fixes
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# good_msg 'Updating for uml system'
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#fi
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# Let Init scripts know that we booted from CD
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export CDBOOT
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|
CDBOOT=1
|
|
[ "${BLADECENTER}" -eq '1' ] && sleep 10
|
|
else
|
|
mkdir -p ${NEW_ROOT}/tmp/.initrd
|
|
fi
|
|
|
|
# Execute script on the cdrom just before boot to update things if necessary
|
|
cdupdate
|
|
|
|
if [ "${SUBDIR}" != '' -a -e "${CHROOT}/${SUBDIR}" ]
|
|
then
|
|
good_msg"Entering ${SUBDIR} to boot"
|
|
CHROOT=${CHROOT}/${SUBDIR}
|
|
fi
|
|
|
|
verbose_kmsg
|
|
|
|
if [ "$0" = '/linuxrc' ]
|
|
then
|
|
[ ! -e ${CHROOT}/dev/console ] && mknod ${CHROOT}/dev/console c 5 1
|
|
echo -ne "${GOOD}>>${NORMAL}${BOLD} Booting"
|
|
|
|
cd ${CHROOT}
|
|
mkdir ${CHROOT}/proc ${CHROOT}/sys 2>/dev/null
|
|
pivot_root . tmp/.initrd
|
|
[ "${BLADECENTER}" -eq '1' ] && sleep 10
|
|
echo -n '.'
|
|
|
|
if /tmp/.initrd/bin/[ "${USE_DEVFS_NORMAL}" -eq '1' -a "${CDROOT}" -eq '0' ]
|
|
then
|
|
umount /tmp/.initrd/proc || echo '*: Failed to unmount the initrd /proc!'
|
|
mount -n --move /tmp/.initrd/dev dev || echo '*: Failed to move over the /dev tree!'
|
|
rm -rf /tmp/.initrd/dev || echo '*: Failed to remove the initrd /dev!'
|
|
elif /tmp/.initrd/bin/[ "${USE_UDEV_NORMAL}" -eq '1' ]
|
|
then
|
|
/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/fd ] && rm /tmp/.initrd/dev/fd
|
|
/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/stdin ] && rm /tmp/.initrd/dev/stdin
|
|
/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/stdout ] && rm /tmp/.initrd/dev/stdout
|
|
/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/stderr ] && rm /tmp/.initrd/dev/stderr
|
|
/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/core ] && rm /tmp/.initrd/dev/core
|
|
umount /tmp/.initrd/dev || echo '*: Failed to unmount the initrd /dev!'
|
|
umount /tmp/.initrd/proc || echo '*: Failed to unmount the initrd /proc!'
|
|
umount /tmp/.initrd/sys || echo '*: Failed to unmount the initrd /sys!'
|
|
elif /tmp/.initrd/bin/[ "${CDROOT}" -eq '1' ]
|
|
then
|
|
umount /tmp/.initrd/proc || echo "*: Failed to unmount the initrd /proc!"
|
|
umount /dev 2>/dev/null
|
|
mount -n --move /tmp/.initrd/dev dev 2>/dev/null
|
|
rm -rf /tmp/.initrd/dev || echo '*: Failed to remove the initrd /dev!'
|
|
|
|
umount /sys 2>/dev/null
|
|
umount /tmp/.initrd/sys 2>/dev/null
|
|
fi
|
|
echo -n '.'
|
|
|
|
# /usr/src/linux/Documentation/initrd.txt:
|
|
# exec chroot . /sbin/init </dev/console >/dev/console 2>&1
|
|
|
|
exec <dev/console >dev/console 2>&1
|
|
echo '.'
|
|
exec chroot . /bin/sh <<- EOF
|
|
umount /tmp/.initrd || echo "*: Failed to unmount the initrd!"
|
|
/sbin/blockdev --flushbufs /dev/ram0 >/dev/null 2>&1
|
|
exec /sbin/init ${REAL_INIT}
|
|
EOF
|
|
elif [ "$0" = '/init' ]
|
|
then
|
|
[ ! -e /${CHROOT}/dev/console ] && mknod /${CHROOT}/dev/console c 5 1
|
|
[ ! -e /${CHROOT}/dev/tty1 ] && mknod /${CHROOT}/dev/tty1 c 4 1
|
|
echo -ne "${GOOD}>>${NORMAL}${BOLD} Booting (initramfs)..."
|
|
|
|
cd ${CHROOT}
|
|
mkdir /${CHROOT}/proc /${CHROOT}/sys 2>/dev/null
|
|
echo -n '.'
|
|
umount /dev || echo '*: Failed to unmount the initrd /dev!'
|
|
umount /sys || echo '*: Failed to unmount the initrd /sys!'
|
|
umount /proc || echo '*: Failed to unmount the initrd /proc!'
|
|
echo -n '.'
|
|
|
|
exec <${CONSOLE} >${CONSOLE} 2>&1
|
|
echo '.'
|
|
|
|
# Cleanup initramfs in the background
|
|
# to reclaim initramfs tmpfs memoryspace
|
|
|
|
|
|
INITRAMFS_FILES=`ls /`
|
|
INITRAMFS_FILES=`echo ${INITRAMFS_FILES}|sed -e "s|${CHROOT#/}||g"`
|
|
|
|
if [ -n "${MEMORY}" ]
|
|
then
|
|
INITRAMFS_FILES=`echo ${INITRAMFS_FILES}|sed -e "s|${MEMORY#/}||g"`
|
|
fi
|
|
|
|
if [ -n "${UNION}" ]
|
|
then
|
|
INITRAMFS_FILES=`echo ${INITRAMFS_FILES}|sed -e "s|${UNION#/}||g"`
|
|
fi
|
|
|
|
INITRAMFS_FILES=`echo ${INITRAMFS_FILES}|sed -e "s|newroot||g"`
|
|
for i in ${INITRAMFS_FILES}
|
|
do
|
|
for j in `/bin/busybox find /$i 2>/dev/null`
|
|
do
|
|
if /bin/busybox [ ! -d "$j" -a "$j" != "/bin/busybox" ]
|
|
then
|
|
/bin/busybox rm "$j"
|
|
fi
|
|
done
|
|
for j in `/bin/busybox find /$i 2>/dev/null`
|
|
do
|
|
if /bin/busybox [ -d "${j}" -a "${j}" != "/bin" -a "${j}" != "/dev" ]
|
|
then
|
|
/bin/busybox rm -r "$j"
|
|
fi
|
|
done
|
|
done
|
|
# End initramfs cleanup
|
|
|
|
# Start the real root init
|
|
(/bin/busybox sleep 3; /bin/busybox rm /dev -r; /bin/busybox rm /bin/busybox) &
|
|
exec /bin/busybox chroot . /bin/sh <<- EOF
|
|
exec /sbin/init ${REAL_INIT}
|
|
EOF
|
|
|
|
fi
|
|
|
|
splash 'verbose'
|
|
|
|
echo 'A fatal error has probably occured since /sbin/init did not'
|
|
echo 'boot correctly. Trying to open a shell...'
|
|
echo
|
|
exec /bin/bash
|
|
exec /bin/sh
|
|
exec /bin/ash
|
|
exec sh
|