scripts/gen_initramfs_list.sh

   1 #!/bin/bash
   2 # Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
   3 # Released under the terms of the GNU GPL
   4 #
   5 # A script to generate newline separated entries (to stdout) from a directory's
   6 # contents suitable for use as a cpio_list for gen_init_cpio.
   7 #
   8 # Arguements: $1 -- the source directory
   9 #
  10 # TODO:  Add support for symlinks, sockets and pipes when gen_init_cpio
  11 #        supports them.
  12
  13 usage() {
  14         echo "Usage: $0 initramfs-source-dir"
  15         exit 1
  16 }
  17
  18 srcdir=$(echo "$1" | sed -e 's://*:/:g')
  19
  20 if [ "$#" -gt 1 -o ! -d "${srcdir}" ]; then
  21         usage
  22 fi
  23
  24 filetype() {
  25         local argv1="$1"
  26
  27         if [ -f "${argv1}" ]; then
  28                 echo "file"
  29         elif [ -d "${argv1}" ]; then
  30                 echo "dir"
  31         elif [ -b "${argv1}" -o -c "${argv1}" ]; then
  32                 echo "nod"
  33         else
  34                 echo "invalid"
  35         fi
  36         return 0
  37 }
  38
  39 parse() {
  40         local location="$1"
  41         local name="${location/${srcdir}//}"
  42         local mode="$2"
  43         local uid="$3"
  44         local gid="$4"
  45         local ftype=$(filetype "${location}")
  46         local str="${mode} ${uid} ${gid}"
  47
  48         [ "${ftype}" == "invalid" ] && return 0
  49         [ "${location}" == "${srcdir}" ] && return 0
  50
  51         case "${ftype}" in
  52                 "file")
  53                         str="${ftype} ${name} ${location} ${str}"
  54                         ;;
  55                 "nod")
  56                         local dev_type=
  57                         local maj=$(LC_ALL=C ls -l "${location}" | \
  58                                         gawk '{sub(/,/, "", $5); print $5}')
  59                         local min=$(LC_ALL=C ls -l "${location}" | \
  60                                         gawk '{print $6}')
  61
  62                         if [ -b "${location}" ]; then
  63                                 dev_type="b"
  64                         else
  65                                 dev_type="c"
  66                         fi
  67                         str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
  68                         ;;
  69                 *)
  70                         str="${ftype} ${name} ${str}"
  71                         ;;
  72         esac
  73
  74         echo "${str}"
  75
  76         return 0
  77 }
  78
  79 find "${srcdir}" -printf "%p %m %U %G\n" | \
  80 while read x; do
  81         parse ${x}
  82 done
  83
  84 exit 0