pkgs/build-support/kernel/make-initrd.sh

   1 source $stdenv/setup
   2
   3 set -o pipefail
   4
   5 objects=($objects)
   6 symlinks=($symlinks)
   7 suffices=($suffices)
   8
   9 mkdir root
  10
  11 # Needed for splash_helper, which gets run before init.
  12 mkdir root/dev
  13 mkdir root/sys
  14 mkdir root/proc
  15
  16
  17 for ((n = 0; n < ${#objects[*]}; n++)); do
  18     object=${objects[$n]}
  19     symlink=${symlinks[$n]}
  20     suffix=${suffices[$n]}
  21     if test "$suffix" = none; then suffix=; fi
  22
  23     mkdir -p $(dirname root/$symlink)
  24     ln -s $object$suffix root/$symlink
  25 done
  26
  27
  28 # Get the paths in the closure of `object'.
  29 storePaths=$(perl $pathsFromGraph closure-*)
  30
  31
  32 # Paths in cpio archives *must* be relative, otherwise the kernel
  33 # won't unpack 'em.
  34 (cd root && cp -prP --parents $storePaths .)
  35
  36
  37 # Put the closure in a gzipped cpio archive.
  38 mkdir -p $out
  39 for PREP in $prepend; do
  40   cat $PREP >> $out/initrd
  41 done
  42 (cd root && find * .[^.*] -exec touch -h -d '@1' '{}' +)
  43 (cd root && find * .[^.*] -print0 | sort -z | cpio --quiet -o -H newc -R +0:+0 --reproducible --null | eval -- $compress >> "$out/initrd")
  44
  45 if [ -n "$makeUInitrd" ]; then
  46     mkimage -A "$uInitrdArch" -O linux -T ramdisk -C "$uInitrdCompression" -d "$out/initrd" $out/initrd.img
  47     # Compatibility symlink
  48     ln -sf "initrd.img" "$out/initrd"
  49 else
  50     ln -s "initrd" "$out/initrd$extension"
  51 fi