using mlfs mkinitramfs script

1 files changed, 178 insertions, 68 deletions

diff --git a/mkinitrd/mkinitramfs.sh b/mkinitrd/mkinitramfs.sh
index 9e32cee..42fad85 100755
--- a/mkinitrd/mkinitramfs.sh
+++ b/mkinitrd/mkinitramfs.sh
@@ -1,81 +1,191 @@
 #!/bin/sh
+# 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
+}
 
-BUILD=/tmp/ramfs
-OUT=${1-/boot/initramfs-linux.img}
+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
 
-# create base directory structure
-printf "creating directories..."
+printf "Creating $INITRAMFS_FILE... "
 
-[ -e $BUILD ] && rm -rf $BUILD
-mkdir -p $BUILD/tmp
+binfiles="sh cat cp dd killall ls mkdir mknod mount "
+binfiles="$binfiles umount sed sleep ln rm uname"
+binfiles="$binfiles readlink basename"
 
-cd $BUILD
-mkdir -p bin dev etc lib proc run sbin sys usr
-mkdir -p lib/firmware lib/modules lib/udev
-mkdir -p etc/modprobe.d etc/udev
+# Systemd installs udevadm in /bin. Other udev implementations have it in /sbin
+if [ -x /bin/udevadm ] ; then binfiles="$binfiles udevadm"; fi
 
-ln -s lib lib64
-ln -s ../bin usr/bin
-ln -s ../sbin usr/sbin
-printf "OK\n"
+sbinfiles="modprobe blkid switch_root"
 
-# copy binaries
-printf "populating /bin..."
-for b in dash cat cp dd killall kmod ln ls mkdir \
-    mknod mount rm sed sleep umount uname \
-    basename readlink printf echo udevadm; do
-    cp -a /bin/$b bin/
+#Optional files and locations
+for f in mdadm mdmon udevd udevadm; do
+  if [ -x /sbin/$f ] ; then sbinfiles="$sbinfiles $f"; fi
 done
-ln -s dash bin/sh
-ln -s kmod bin/insmod
-ln -s kmod bin/lsmod
-printf "OK\n"
-
-# create nodes for udev to mount
-printf "creating nodes..."
-mknod -m 600 dev/console c 5 1
-mknod -m 666 dev/null c 1 3
-printf "OK\n"
-
-# Copy udev configuration
-printf "configuring udev..."
-cp  /etc/udev/udev.conf etc/udev/
-cp -r /etc/udev/rules.d   etc/udev/
-cp -r /lib/udev/*         lib/udev/
-printf "OK\n"
-
-# set module order
-touch etc/modprobe.d/modprobe.conf
-
-# copy the init script
-printf "installing init script..."
-cp /sbin/initramfs-init sbin/init
-printf "OK\n"
-
-# copy required libraries
-printf "populating /lib..."
-for l in c acl attr blkid cap kmod lzma mount ncursesw readline z curses history zstd; do
-        cp /lib/lib$l.so lib/
+
+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 $WDIR/etc/udev/rules.d
 done
-ln -s libc.so /ld-musl-$(uname -m).so.1
-printf "OK\n"
-
-# copy any firmware
-[ -d /lib/firmware ] && {
-    printf "installing firmware..."
-    cp -r /lib/firmware/* lib/firmware/
-    printf "OK\n"
-}
 
-# copy any modules
-printf "installing modules..."
-cp  -r /lib/modules/* lib/modules/
-printf "OK\n"
+# 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 $WDIR/lib
+fi
+
+# Install 
100  4957  100  4957    0     0  36023      0 --:--:-- --:--:-- --:--:-- 36182
+the kernel modules if requested
+if [ -n "$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
 
-# create the initramfs image
-printf "creating initramfs image..."
-find ./ | cpio -o -H newc | gzip -9 > $OUT
-printf "OK\n"
+# Remove the temporary directory and file
+rm -rf $WDIR $unsorted
+printf "done.\n"
 
-printf "Written initramfs image to $OUT\n"