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352 lines
8.5 KiB
352 lines
8.5 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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USE_DEVFS_NORMAL=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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[ -n "$QUIET" ] && echo "0" > /proc/sys/kernel/printk
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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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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 "${x}"`
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;;
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cdroot)
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CDROOT=1
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REAL_ROOT=""
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;;
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devfs)
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USE_DEVFS_NORMAL=1
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;;
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nodevfs)
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USE_DEVFS_NORMAL=0
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;;
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loop\=*)
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LOOP=`parse_opt "${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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*)
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;;
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esac
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done
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# Scan CMDLINE for any "doscsi" or "noscsi"-type arguments
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for x in $HWOPTS
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do
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for y in $CMDLINE
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do
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if [ "$y" = "do${x}" ]
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then
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MY_HWOPTS="${MY_HWOPTS} $x"
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elif [ "$y" = "no${x}" ]
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then
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MY_HWOPTS="`echo ${MY_HWOPTS} | sed -e 's/${x}//g' -`"
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fi
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done
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done
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if [ -d "/lib/modules" ]
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then
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echo -e "${GOOD}>>${NORMAL}${BOLD} Loading modules...${NORMAL}"
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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 $modules | sed 's/-//'`=1
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done
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else
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echo -e "${GREEN}>>${NORMAL}${BOLD} Skipping module load; no modules in the initrd!${NORMAL}"
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fi
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chooseKeymap() {
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echo -e "${GOOD}>>${NORMAL}${BOLD} Loading keymaps...${NORMAL}"
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cat /lib/keymaps/keymapList
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read -p "<< Load keymap: " keymap
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if [ -e /lib/keymaps/${keymap}.map ]
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then
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echo -e "${GOOD}>>${NORMAL}${BOLD} Loading the ''${keymap}'' keymap...${NORMAL}"
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loadkmap < /lib/keymaps/${keymap}.map
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elif [ "$keymap" = "" ]
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then
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echo -e "${GOOD}>>${NORMAL}${BOLD} Loading default US keymap...${NORMAL}"
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loadkmap < /lib/keymaps/us.map
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else
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echo -e "${BAD}!! ${NORMAL}${BOLD}Sorry, but keymap ''${keymap}'' is invalid!${NORMAL}"
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chooseKeymap
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fi
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}
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if [ "${DO_keymap}" ]
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then
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chooseKeymap
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fi
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echo -e "${GOOD}>>${NORMAL}${BOLD} Mounting filesystems...${NORMAL}"
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mkdir /newroot
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if [ "${CDROOT}" -eq "1" ]
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then
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mount -t tmpfs tmpfs /newroot
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mkdir /newroot/dev /newroot/mnt /newroot/mnt/cdrom /newroot/mnt/livecd /newroot/tmp /newroot/tmp/.initrd /newroot/mnt/gentoo
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[ ! -e /newroot/dev/.devfsd ] && mount -t devfs devfs /newroot/dev
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devfsd /newroot/dev -np
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sleep 1
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findcdmount /newroot/dev/cdroms/*
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# not in /dev/cdroms try /dev/ide/cd
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if [ "${REAL_ROOT}" = "" ]
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then
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findcdmount /newroot/dev/ide/cd/*
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fi
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if [ "${REAL_ROOT}" = "" ]
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then
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exec /bin/ash
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# Undo stuff
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# kill_devfsd # We run devfsd with -np now
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sleep 1
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umount /newroot/dev/
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sleep 1
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umount /newroot
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# shouldn't be anything in here b/c it was on tmpfs
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rm -rf /newroot/*
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CDROOT=0
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echo "Could not find CD to boot, gonna need something else"
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fi
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fi
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# Don't do else b/c we set CDROOT=0 if it fails to detect
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if [ "${CDROOT}" -eq "0" -a "${USE_DEVFS_NORMAL}" -eq "1" ]
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then
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[ ! -e /dev/.devfsd ] && mount -t devfs devfs /dev
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devfsd /dev -np
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fi
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echo -e "${GOOD}>>${NORMAL}${BOLD} Determining root device...${NORMAL}"
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while true
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do
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while [ "${got_good_root}" != "1" ]
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do
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if [ "${REAL_ROOT}" = "shell" ]
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then
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/bin/ash
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REAL_ROOT=""
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got_good_root=0
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continue
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elif [ "${REAL_ROOT}" = "" ]
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then
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# No REAL_ROOT determined/specified. Prompt user for root block device.
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echo -e "${BAD}>>${NORMAL} The root block device is unspecified or not detected."
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echo " Please specify a device to boot, or \"shell\" for a shell."
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echo -n "boot() :: "
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read REAL_ROOT
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got_good_root=0
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elif [ -b "${REAL_ROOT}" ]
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then
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got_good_root=1
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else
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echo -e "${BAD}>>${NORMAL} 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 "${got_good_root}" = "1" ]
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then
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break
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else
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echo -e "${GOOD}>>${NORMAL}${BOLD} Mounting root...${NORMAL}"
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mount -o rw ${REAL_ROOT} /newroot
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if [ "$?" = "0" ]
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then
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break
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else
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echo -e "${BAD}>> ${NORMAL}Could not mount specified ROOT, try again"
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got_good_root=0
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REAL_ROOT=""
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fi
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fi
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done
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[ -n "$QUIET" ] && echo "6" > /proc/sys/kernel/printk
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check_loop() {
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if [ "${LOOP}" = "" -o ! -e "mnt/cdrom/${LOOP}" ]
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then
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echo "Invalid loop location: ${LOOP}"
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echo "Please export LOOP with a valid location, or reboot and pass a proper loop=..."
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echo "kernel command line!"
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/bin/ash
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fi
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}
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if [ "${CDROOT}" = "1" ]
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then
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echo -e "${GOOD}>>${NORMAL}${BOLD} Filling tmpfs...${NORMAL}"
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cd /newroot
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# Failsafe if some idiot didn't set loop type
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if [ "${LOOPTYPE}" = "" ]
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then
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echo -e "${WARN}** ${NORMAL}${BOLD}Warning: loop type unspecified!${NORMAL}"
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if [ "${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 [ "${LOOP}" = "/livecd.gcloop" ]
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then
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LOOPTYPE="gcloop"
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else
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LOOPTYPE="noloop"
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fi
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fi
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if [ "${LOOPTYPE}" != "noloop" ]
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then
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check_loop
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if [ "${DO_cache}" ]
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then
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echo -e "${GOOD}>>${NORMAL}${BOLD} Copying loop file for caching...${NORMAL}"
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cp -a /newroot/mnt/cdrom/${LOOP} /newroot/mnt/${LOOP}
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if [ $? -ne 0 ]
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then
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echo -e "${BAD}!!${NORMAL}${BOLD} Failed to cache the loop file! Lack of space?"
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rm -rf /newroot/mnt/livecd.* 2>/dev/null
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rm -rf /newroot/mnt/zisofs 2>/dev/null
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else
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LOOPEXT="../"
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fi
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fi
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fi
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if [ "${LOOPTYPE}" = "normal" ]
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then
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# bind-mount /dev/ so that loop devices can be found
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mount -o bind /newroot/dev /dev
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echo -e "${GOOD}>>${NORMAL}${BOLD} Mounting loop filesystem...${NORMAL}"
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mount -t ext2 -o loop,ro /newroot/mnt/cdrom/${LOOPEXT}${LOOP} /newroot/mnt/livecd
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if [ "$?" != "0" ]
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then
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echo "FAILED TO MOUNT LOOP FILESYSTEM, barfing out to shell"
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/bin/ash
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fi
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FS_LOCATION="mnt/livecd"
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umount /dev
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elif [ "${LOOPTYPE}" = "squashfs" ]
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then
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mount -o bind /newroot/dev /dev
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echo -e "${GOOD}>>${NORMAL}${BOLD} Mounting squashfs filesystem...${NORMAL}"
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mount -t squashfs -o loop,ro /newroot/mnt/cdrom/${LOOPEXT}${LOOP} /newroot/mnt/livecd
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if [ "$?" != "0" ]
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then
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echo "FAILED TO MOUNT LOOP FILESYSTEM, barfing out to shell"
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/bin/ash
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fi
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FS_LOCATION="mnt/livecd"
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umount /dev
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elif [ "${LOOPTYPE}" = "gcloop" ]
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then
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echo -e "${GOOD}>>${NORMAL}${BOLD} Mounting gcloop filesystem...${NORMAL}"
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mount -o bind /newroot/dev /dev
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echo " " | losetup -E 19 -e ucl-0 -p0 /newroot/dev/loop0 /newroot/mnt/cdrom/${LOOPEXT}${LOOP}
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if [ "$?" != "0" ]
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then
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echo "FAILED TO losetup THE LOOP DEVICE"
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/bin/ash
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fi
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mount -t ext2 -o ro /newroot/dev/loop0 /newroot/mnt/livecd
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FS_LOCATION="mnt/livecd"
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umount /dev
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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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echo -e "${GOOD}>>${NORMAL}${BOLD} Filling filesystem...${NORMAL}"
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for x in ${ROOT_LINKS}
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do
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ln -s "${FS_LOCATION}/${x}" "${x}"
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done
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mkdir initrd proc tmp sys
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chmod 1777 tmp
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(cd /newroot/${FS_LOCATION}; cp -a ${ROOT_TREES} /newroot)
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else
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mkdir -p /newroot/tmp/.initrd
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fi
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[ ! -e /newroot/dev/console ] && mknod /newroot/dev/console c 5 1
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echo -ne "${GOOD}>>${NORMAL}${BOLD} Booting"
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cd /newroot
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pivot_root . tmp/.initrd
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echo -n '.'
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if [ "${USE_DEVFS_NORMAL}" -eq "1" -a "${CDROOT}" -eq "0" ]
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then
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umount /tmp/.initrd/proc || echo '*: Failed to unmount the initrd /proc!'
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mount -n --move /tmp/.initrd/dev dev || echo '*: Failed to move over the /dev tree!'
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rm /tmp/.initrd/dev -rf || '*: Failed to remove the initrd /dev!'
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elif [ "${CDROOT}" -eq "1" ]
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then
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# If automount at boot was on with devfs, we'll want to umount it
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# also umount proc
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mount -t proc proc /proc
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umount /tmp/.initrd/proc > /dev/null 2>&1 || echo "*: Failed to unmount /tmp/.initrd/proc!"
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umount /dev > /dev/null 2>&1
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umount /proc > /dev/null 2>&1
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fi
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echo -n '.'
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# /usr/src/linux/Documentation/initrd.txt
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# here's the line it says we should do:
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# exec chroot . /sbin/init </dev/console >/dev/console 2>&1
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exec <dev/console >dev/console 2>&1
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echo '.'
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exec chroot . /bin/sh <<- EOF
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umount /tmp/.initrd || echo "*: Failed to unmount the initrd!"
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/sbin/blockdev --flushbufs /dev/ram0 >/dev/null 2>&1
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exec /sbin/init
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EOF
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echo "A fatal error has probably occured since /sbin/init did not"
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echo "boot correctly. Trying to open a shell..."
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echo
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exec /bin/bash
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exec /bin/sh
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exec /bin/ash
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exec sh
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