diff options
Diffstat (limited to 'mkinitrd/mkinitramfs')
| -rwxr-xr-x | mkinitrd/mkinitramfs | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/mkinitrd/mkinitramfs b/mkinitrd/mkinitramfs new file mode 100755 index 0000000..2f8adda --- /dev/null +++ b/mkinitrd/mkinitramfs @@ -0,0 +1,190 @@ +#!/bin/bash +# This file based in part on the mkinitramfs script for the LFS LiveCD +# written by Alexander E. Patrakov and Jeremy Huntwork. + +copy() +{ + local file + + if [ "$2" == "lib" ]; then + file=$(PATH=/lib:/usr/lib type -p $1) + else + file=$(type -p $1) + fi + + if [ -n $file ] ; then + cp $file $WDIR/$2 + else + echo "Missing required file: $1 for directory $2" + rm -rf $WDIR + exit 1 + fi +} + +if [ -z $1 ] ; then + INITRAMFS_FILE=initrd.img-no-kmods +else + KERNEL_VERSION=$1 + INITRAMFS_FILE=initrd.img-$KERNEL_VERSION +fi + +if [ -n "$KERNEL_VERSION" ] && [ ! -d "/lib/modules/$1" ] ; then + echo "No modules directory named $1" + exit 1 +fi + +printf "Creating $INITRAMFS_FILE... " + +binfiles="sh cat cp dd killall ls mkdir mknod mount " +binfiles="$binfiles umount sed sleep ln rm uname" +binfiles="$binfiles readlink basename" + +# Systemd installs udevadm in /bin. Other udev implementations have it in /sbin +if [ -x /bin/udevadm ] ; then binfiles="$binfiles udevadm"; fi + +sbinfiles="modprobe blkid switch_root" + +#Optional files and locations +for f in mdadm mdmon udevd udevadm; do + if [ -x /sbin/$f ] ; then sbinfiles="$sbinfiles $f"; fi +done + +unsorted=$(mktemp /tmp/unsorted.XXXXXXXXXX) + +DATADIR=/usr/share/mkinitramfs +INITIN=init.in + +# Create a temporary working directory +WDIR=$(mktemp -d /tmp/initrd-work.XXXXXXXXXX) + +# Create base directory structure +mkdir -p $WDIR/{bin,dev,lib/firmware,run,sbin,sys,proc,usr} +mkdir -p $WDIR/etc/{modprobe.d,udev/rules.d} +touch $WDIR/etc/modprobe.d/modprobe.conf +ln -s lib $WDIR/lib64 +ln -s ../bin $WDIR/usr/bin + +# Create necessary device nodes +mknod -m 640 $WDIR/dev/console c 5 1 +mknod -m 664 $WDIR/dev/null c 1 3 + +# Install the udev configuration files +if [ -f /etc/udev/udev.conf ]; then + cp /etc/udev/udev.conf $WDIR/etc/udev/udev.conf +fi + +for file in $(find /etc/udev/rules.d/ -type f) ; do + cp $file $WDIR/etc/udev/rules.d +done + +# Install any firmware present +cp -a /lib/firmware $WDIR/lib + +# Copy the RAID configuration file if present +if [ -f /etc/mdadm.conf ] ; then + cp /etc/mdadm.conf $WDIR/etc +fi + +# Install the init file +install -m0755 $DATADIR/$INITIN $WDIR/init + +if [ -n "$KERNEL_VERSION" ] ; then + if [ -x /bin/kmod ] ; then + binfiles="$binfiles kmod" + else + binfiles="$binfiles lsmod" + sbinfiles="$sbinfiles insmod" + fi +fi + +# Install basic binaries +for f in $binfiles ; do + if [ -e /bin/$f ]; then d="/bin"; else d="/usr/bin"; fi + ldd $d/$f | sed "s/\t//" | cut -d " " -f1 >> $unsorted + copy $d/$f bin +done + +# Add lvm if present +if [ -x /sbin/lvm ] ; then sbinfiles="$sbinfiles lvm dmsetup"; fi + +for f in $sbinfiles ; do + ldd /sbin/$f | sed "s/\t//" | cut -d " " -f1 >> $unsorted + copy $f sbin +done + +# Add udevd libraries if not in /sbin +if [ -x /lib/udev/udevd ] ; then + ldd /lib/udev/udevd | sed "s/\t//" | cut -d " " -f1 >> $unsorted +elif [ -x /lib/systemd/systemd-udevd ] ; then + ldd /lib/systemd/systemd-udevd | sed "s/\t//" | cut -d " " -f1 >> $unsorted +fi + +# Add module symlinks if appropriate +if [ -n "$KERNEL_VERSION" ] && [ -x /bin/kmod ] ; then + ln -s kmod $WDIR/bin/lsmod + ln -s kmod $WDIR/bin/insmod +fi + +# Add lvm symlinks if appropriate +# Also copy the lvm.conf file +if [ -x /sbin/lvm ] ; then + ln -s lvm $WDIR/sbin/lvchange + ln -s lvm $WDIR/sbin/lvrename + ln -s lvm $WDIR/sbin/lvextend + ln -s lvm $WDIR/sbin/lvcreate + ln -s lvm $WDIR/sbin/lvdisplay + ln -s lvm $WDIR/sbin/lvscan + + ln -s lvm $WDIR/sbin/pvchange + ln -s lvm $WDIR/sbin/pvck + ln -s lvm $WDIR/sbin/pvcreate + ln -s lvm $WDIR/sbin/pvdisplay + ln -s lvm $WDIR/sbin/pvscan + + ln -s lvm $WDIR/sbin/vgchange + ln -s lvm $WDIR/sbin/vgcreate + ln -s lvm $WDIR/sbin/vgscan + ln -s lvm $WDIR/sbin/vgrename + ln -s lvm $WDIR/sbin/vgck + # Conf file(s) + cp -a /etc/lvm $WDIR/etc +fi + +# Install libraries +sort $unsorted | uniq | while read library ; do + if [ "$library" == "linux-vdso.so.1" ] || + [ "$library" == "linux-gate.so.1" ]; then + continue + fi + + copy $library lib +done + +if [ -d /lib/udev ]; then + cp -a /lib/udev $WDIR/lib +fi +if [ -d /lib/systemd ]; then + cp -a /lib/systemd $WDIR/lib +fi + +# Install the kernel modules if requested +if [ -n "$KERNEL_VERSION" ]; then + find \ + /lib/modules/$KERNEL_VERSION/kernel/{crypto,fs,lib} \ + /lib/modules/$KERNEL_VERSION/kernel/drivers/{block,ata,md,firewire} \ + /lib/modules/$KERNEL_VERSION/kernel/drivers/{scsi,message,pcmcia,virtio} \ + /lib/modules/$KERNEL_VERSION/kernel/drivers/usb/{host,storage} \ + -type f 2> /dev/null | cpio --make-directories -p --quiet $WDIR + + cp /lib/modules/$KERNEL_VERSION/modules.{builtin,order} \ + $WDIR/lib/modules/$KERNEL_VERSION + + depmod -b $WDIR $KERNEL_VERSION +fi + +( cd $WDIR ; find . | cpio -o -H newc --quiet | gzip -9 ) > $INITRAMFS_FILE + +# Remove the temporary directory and file +rm -rf $WDIR $unsorted +printf "done.\n" + |