#!/bin/sh
#
# Written by andrey joukov
# (C) 1996 2:5020/337.13@fidonet.org
# Updated by christian.gennerat@alcatel.fr 1999
#            Andrew V. Samoilov <sav@bcs.zp.ua> 2000
#            Oleg V. Konovalov <olegarch@linuxinside.com> 2004
# beta version 2.1
#
# rar and unrar can be found on http://www.rarlabs.com/

RAR=rar
UNRAR=$RAR

# Prefer unrar (freeware).  Try to find unrar in $PATH.
save_IFS="$IFS"; IFS=:
for dir in $PATH; do
    IFS="$save_IFS"
    test -z "$dir" && dir=.
    if test -x $dir/unrar -a -f $dir/unrar; then
	UNRAR=$dir/unrar
	break
    fi
done

mcrarfs_list ()
{
     $UNRAR v -c- "$1" | gawk -v uid=${UID-0} '
BEGIN { flag=0; date="JanFebMarAprMayJunJulAugSepOctNovDec" }
/^-------/ { flag++; if (flag > 1) exit 0; next }
{
if (flag == 0) next
if ( !/ [0-9][0-9]:[0-9][0-9] /) str = $0  # there is no time spec in this line
else {
    if (str ~ /^\^/)
	str=substr(str, 2)
    split($4, a, "-")
    if (a[3] < 50)
	a[3] = 2000 + a[3]
    else
	a[3] = 1900 + a[3]
    if (index($6, "D") != 0)
	$6="drwxr-xr-x"
    else
	if (index($6, ".") != 0)
	    $6="-rw-r--r--"
    printf "%s   1 %-8d %-8d %8d %3s %2d %4d %s %s\n", $6, uid, 0, $1, substr(date, (a[2]-1)*3+1, 3), a[1], a[3], $5, str
}
}'
}

mcrarfs_copyin ()
{
# copyin by christian.gennerat@alcatel.fr
# preserve pwd. It is clean, but is it necessary?
    pwd=`pwd`
# Create a directory and copy in it the tmp file with the good name     
    mkdir "$3.dir"
    cd "$3.dir"
    di="${2%/*}"
# if file is to be written upper in the archive tree, make fake dir
    if test "$di" != "${2##*/}" ; then
        mkdir -p "$di" 
    fi
    cp -fp "$3" "$3.dir/$2" 
    $RAR a "$1" "$2" >/dev/null
    cd $pwd
    rm -rf "$3.dir"
}

mcrarfs_copyout ()
{
    $UNRAR p -c- -inul "$1" "$2" > "$3"
}

mcrarfs_mkdir ()
{
# preserve pwd. It is clean, but is it necessary?
    pwd=`pwd`
# Create a directory and create in it a tmp directory with the good name     
    dir=tmpdir.${RANDOM}
    mkdir $dir
    cd $dir
    mkdir -p "$2"  
# rar cannot create an empty directory    
    touch "$2"/.rarfs
    $RAR a -r "$1" "$2" >/dev/null
    $RAR d "$1" "$2/.rarfs" >/dev/null
    cd $pwd
    rm -rf $dir
}

mcrarfs_rm ()
{
    $RAR d "$1" "$2" >/dev/null
}

umask 077

cmd="$1"
shift

case "$cmd" in
  list)    mcrarfs_list    "$@" | sort +9 ;; # rar lists directories
					     # after files, so sort names
					     # to prevent duplication
  rm)      mcrarfs_rm      "$@" ;;
  rmdir)   mcrarfs_rm      "$@" ;;
  mkdir)   mcrarfs_mkdir   "$@" ;;
  copyin)  mcrarfs_copyin  "$@" ;;
  copyout) mcrarfs_copyout "$@" ;;
  *) exit 1 ;;
esac
exit 0