cirros-testvm/src-cirros/bin/xmakedevs

   1 #!/bin/sh -e
   2 # vi: ts=4 noexpandtab
   3 #
   4 # this mimics function of buildroot's makedev
   5 # read a file like:
   6 #  <name>    <type>      <mode>  <uid>   <gid>   <major> <minor> <start> <inc>   <count>
   7 # and make files
   8 DEBUG=${XMAKEDEV_DEBUG}
   9 Usage() {
  10    cat <<EOF
  11 Usage: ${0##*/} file root
  12   read file, and make devs apropriately under 'root'.
  13
  14 file looks like:
  15   <name>    <type>      <mode>  <uid>   <gid>   <major> <minor> <start> <inc>   <count>
  16   where name is the file name,  type can be one of:
  17    f       A regular file
  18    d       Directory
  19    c       Character special device file
  20    b       Block special device file
  21    p       Fifo (named pipe)
  22 EOF
  23 }
  24
  25 error() { echo "$@" 1>&2; exit 1; }
  26 fail() { [ $# -eq 0 ] || error "$@" ; exit 1; }
  27
  28 [ "$1" = "-h" -o "$1" = "--help" ] && { Usage; exit 0; }
  29 [ $# -eq 2 ] || { Usage 1>&2; exit 1; }
  30
  31 root="$2"
  32
  33 if [ "$1" != "-" ]; then
  34         exec < "$1" || fail "failed to redirect input from $1"
  35 fi
  36
  37 chmodchown() {
  38         local mode=$1 uid=$2 gid=$3
  39         shift 3;
  40         [ "$mode" = "-" ] || chmod "$mode" "$@" || return
  41         [ "$uid" = "-" ] || chown "$uid" "$@" || return
  42         [ "$gid" = "-" ] || chgrp "$gid" "$@" || return
  43 }
  44 iswild() {
  45         local star="\\*"
  46         case "$1" in
  47                 *$star*) return 0;;
  48         esac
  49         return 1
  50 }
  51
  52 cd "$root" || fail "failed cd $root"
  53
  54 while read line; do
  55         line=${line%#*}
  56         [ -n "$line" ] || continue
  57         set -f
  58         set -- $line
  59         name=$1; type=$2; mode=$3; uid=$4; gid=$5; major=$6; minor=$7; start=$8; inc=$9; count="${10}"
  60         set +f
  61         files="./${name#/}"
  62         if iswild "$name"; then
  63                 files=$(echo ./$name)
  64                 iswild "$files" && fail "wildcards in wildcards: $files"
  65         fi
  66         case "$type" in
  67                 f)
  68                         for f in $files; do
  69                                 $DEBUG mkdir -p "${f%/*}" || fail "failed to make ${f%/*}";
  70                         done
  71                         $DEBUG touch $files &&
  72                         $DEBUG chmodchown "$mode" "$uid" "$gid" $files ||
  73                         fail "failed create file $files"
  74                         ;;
  75                 d)
  76                         $DEBUG mkdir -p $files &&
  77                         $DEBUG chmodchown "$mode" "$uid" "$gid" $files ||
  78                         fail "failed create dir $files"
  79                         ;;
  80                 c|b)
  81                         for f in $files; do
  82                                 $DEBUG mkdir -p "${f%/*}" || fail "failed to make ${f%/*}";
  83                         done
  84                         if [ "$count" = "-" ]; then
  85                                 $DEBUG mknod $files $type $major $minor ||
  86                                         fail "failed mknod"
  87                                 $DEBUG chmodchown "$mode" "$uid" "$gid" $files ||
  88                                         fail "failed chmodchown '$mode' '$uid' '$gid' $files"
  89                         else
  90                                 [ "$count" = "-" ] && count=1;
  91                                 i=0
  92                                 while [ $i -lt $count ]; do
  93                                         fname="./$name"
  94                                         $DEBUG mknod "$fname" "$type" "$major" "$(($minor+($i*$inc)))"
  95                                         $DEBUG chmodchown "$fname" "$mode" "$uid" "$gid"
  96                                         i=$(($i+1))
  97                                 done
  98                         fi
  99                         ;;
 100         esac
 101 done