118 lines
3.0 KiB
Bash
Executable File
118 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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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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[ -x /bin/plymouth ] && plymouth --hide-splash
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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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bash < /dev/console
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}
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getarg() {
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for o in $(< /proc/cmdline); do
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[[ $o == $1 ]] && { echo $o; break; }
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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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trap "emergency_shell" 0 2
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# /dev/console comes from the built-in initramfs crud in the kernel
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# someday, we may need to mkdir /dev first here
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exec > /dev/console 2>&1 < /dev/console
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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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# FIXME: what device nodes does plymouth really _need_ ?
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mknod /dev/ptmx c 5 2
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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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# start plymouth if it's available
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# arguably we need some of udev run first for fbmods and above devnodes :/
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[ -x /bin/plymouthd ] && plymouthd --attach-to-session
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[ -x /bin/plymouth ] && plymouth --show-splash
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# start up udev and trigger cold plugs
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udevd --daemon
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udevadm trigger
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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=${root#root=}
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echo -n "Going to mount rootfs ($root)"
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case $root in
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LABEL=*) root=${root#LABEL=}
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root=${root//\//\\x2f}
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root="/dev/disk/by-label/${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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while [ ! -e $root ]; do
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echo -n "."
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sleep 1
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tries=$(($tries + 1))
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if [ $tries -gt 30 ]; then
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emergency_shell
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fi
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done
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echo -e "\n\nMounting rootfs after $tries seconds"
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ln -s "$root" /dev/root
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mount -o ro /dev/root $NEWROOT || emergency_shell
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# now we need to prepare to switchroot
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mount --bind /dev $NEWROOT/dev
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# FIXME: now for a bunch of boiler-plate mounts. really, we should have
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# some like /etc/fstab.sys that's provided by filesystem/initscripts
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# and then do mount -f /etc/fstab.sys -a
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mount -t proc /proc $NEWROOT/proc
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mount -t sysfs /sys $NEWROOT/sys
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# FIXME: load selinux policy. this should really be done after we switchroot
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if [ -x $NEWROOT/usr/sbin/load_policy ]; then
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chroot $NEWROOT /usr/sbin/load_policy -i
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if [ $? -eq 3 ]; then
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echo "Initial SELinux policy load failed and enforcing mode requested."
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echo "Not continuing"
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sleep 100d
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exit 1
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fi
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fi
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# kill off udev
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kill `pidof udevd`
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[ -x /bin/plymouth ] && plymouth --newroot=$NEWROOT
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# FIXME: nash die die die
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exec switch_root
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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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sleep 100d
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exit 1
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