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https://github.com/dracutdevs/dracut.git
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27994f9e28
This patch series adds support for some common mount arguments that have to be handled in the initramfs. It is also available at http://git.fnordovax.org/dracut/log/?h=handle-more-parameters
106 lines
2.6 KiB
Bash
Executable File
106 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# Licensed under the GPLv2
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#
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# Copyright 2008, Red Hat, Inc.
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# Jeremy Katz <katzj@redhat.com>
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emergency_shell()
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{
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echo ; echo
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echo "Bug in initramfs /init detected. Dropping to a shell. Good luck!"
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echo
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sh -i
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}
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getarg() {
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local o line
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for o in $CMDLINE; do
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[ "${o%%=*}" = "$1" ] && { echo $o; return 0; }
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done
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return 1
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}
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source_all() {
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local f
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[ "$1" ] && [ -d "/$1" ] || return
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for f in "/$1"/*.sh; do [ -f "$f" ] && . "$f"; done
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}
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echo "Starting initrd..."
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export PATH=/sbin:/bin:/usr/sbin:/usr/bin
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export TERM=linux
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CONSOLE=/dev/console
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[ -c $CONSOLE ] && exec >$CONSOLE 2>&1 <$CONSOLE
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trap "emergency_shell" 0
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# mount some important things
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mount -t proc /proc /proc
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mount -t sysfs /sys /sys
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mount -t tmpfs -omode=0755 udev /dev
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read CMDLINE </proc/cmdline;
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# FIXME: what device nodes does plymouth really _need_ ?
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mknod /dev/ptmx c 5 2
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mknod /dev/console c 5 0
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mknod /dev/fb c 29 0
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mkdir /dev/pts
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mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts
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mknod /dev/tty0 c 4 0
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mknod /dev/tty1 c 4 1
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mknod /dev/null c 1 3
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source_all pre-udev
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# start up udev and trigger cold plugs
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udevd --daemon
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udevadm trigger >/dev/null 2>&1
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# mount the rootfs
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NEWROOT="/sysroot"
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# FIXME: there's got to be a better way ...
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# it'd be nice if we had a udev rule that just did all of the bits for
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# figuring out what the specified root is and linking it /dev/root
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root=$(getarg root); root=${root#root=}
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case $root in
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LABEL=*) root=${root#LABEL=}
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root="$(echo $root |sed 's,/,\\x2f,g')"
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root="/dev/disk/by-label/${root}" ;;
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UUID=*) root="/dev/disk/by-uuid/${root#UUID=}" ;;
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'') echo "Warning: no root specified"
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root="/dev/sda1" ;;
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esac
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# should we have a timeout?
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tries=0
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echo "Waiting up to 30 seconds for $root to become available"
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udevadm settle --timeout=30
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source_all pre-mount
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echo "Trying to mount rootfs $root"
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[ -e "$root" ] || emergency_shell
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ln -s "$root" /dev/root
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mount -o ro /dev/root $NEWROOT || emergency_shell
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INIT=$(getarg init)
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[ "$INIT" ] || {
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for i in /sbin/init /etc/init /init /bin/sh; do
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[ -x "$NEWROOT$i" ] && { INIT="$i"; break; }
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done
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[ "$INIT" ] || {
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echo "Cannot find init! Please check to make sure you passed"
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echo "a valid root filesystem! Dropping to a shell."
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emergency_shell
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}
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}
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source_all pre-pivot
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echo "Switching to real root filesystem $root"
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exec switch_root "$NEWROOT" "$INIT" $CMDLINE || {
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# davej doesn't like initrd bugs
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echo "Something went very badly wrong in the initrd. Please "
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echo "file a bug against mkinitrd."
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emergency_shell
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}
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