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115 lines
2.9 KiB
115 lines
2.9 KiB
#!/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 $root" |
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if rflags="$(getarg rootflags)"; then |
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rflags="${rflags#rootflags=}" |
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getarg rw >/dev/null && rflags="${rflags},rw" || rflags="${rflags},ro" |
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else |
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getarg rw >/dev/null && rflags=rw || rflags=ro |
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fi |
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[ -e "$root" ] || emergency_shell |
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ln -s "$root" /dev/root |
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fstype="$(getarg rootfstype)" && fstype="-t ${fstype#rootfstype=}" |
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mount $fstype -o $rflags /dev/root $NEWROOT || emergency_shell |
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INIT=$(getarg init); INIT=${INIT#init=} |
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[ "$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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kill $(pidof udevd) |
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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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