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#! /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
#
# Andrew Borodin <aborodin@vmail.ru>
# David Haller <dnh@opensuse.org>
#	2013: support unrar5
#
# beta version 2.0
#
# rar and unrar can be found on http://www.rarlabs.com/

RAR=rar

# Prefer unrar (freeware).
UNRAR=`which unrar 2>/dev/null`

[ -z $UNRAR ] && UNRAR=$RAR
[ ! -x $UNRAR -a -x $RAR ] && UNRAR=$RAR

# Let the test framework hook in:
UNRAR=${MC_TEST_EXTFS_LIST_CMD:-$UNRAR}

# Determine the $UNRAR version
if [ -n "$MC_TEST_EXTFS_UNRAR_VERSION" ]; then
  # Let the test framework fool us:
  UNRAR_VERSION=$MC_TEST_EXTFS_UNRAR_VERSION
else
  # Figure it out from rar itself:
  UNRAR_VERSION=`$UNRAR -cfg- -? | grep "Copyright" | sed -e 's/.*\([0-9]\)\..*/\1/'`
fi

mcrar4fs_list ()
{
     $UNRAR v -c- -cfg- "$1" | gawk -v uid=`id -u` -v gid=`id -g` '
BEGIN { flag=0 }
/^-------/ { flag++; if (flag > 1) exit 0; next }
flag==1 {
    str = substr($0, 2)
    getline
    split($4, a, "-")
    if (index($6, "D") != 0)
	$6="drwxr-xr-x"
    else
	if (index($6, ".") != 0)
	    $6="-rw-r--r--"
    printf "%s 1 %s %s %d %02d/%02d/%02d %s ./%s\n", $6, uid, gid, $1, a[2], a[1], a[3], $5, str
}'
}

mcrar5fs_list ()
{
    $UNRAR vt -c- -cfg- "$1" | gawk -F ':' -v uid=`id -u` -v gid=`id -g` '
    {
        ### remove space after the ":" of the field name
        sub ("^ ", "", $2);
    }

    $1 ~ /^ *Name$/ {
        ### next file
        name = mtime = size = attrs = "";
        delete date;
        name = $2;
        ### if the name contains ":", append the rest of the fields
        if (NF > 2) {
            for (i = 3; i <= NF; i++) {
                name = name ":" $i;
            }
        }
    }
    $1 ~ /^ *mtime$/ {
        mtime = $2 ":" $3;
    }
    $1 ~ /^ *Size$/ {
        size = $2;
    }
    $1 ~ /^ *Attributes$/ {
        attrs = $2;
    }

    $1 ~ /^ *Compression$/ {
        ### file done, using /^$/ is not so good you
        ### would have to skip the version stuff first

        ### get date and time
        split (mtime, date, " ");
        time = date[2];
        ### cut off seconds from the time
        sub (",[0-9]*$", "", time);
        ### split for reordering of the date in the printf below
        split (date[1], date, "-");
        ### mc seems to be able to parse 4 digit years too, so remove if tested
        # sub ("^..", "", date[1]); ### cut year to 2 digits only

        ### check/adjust rights
        if (index (attrs, "D") != 0) {
            attrs = "drwxr-xr-x";
        } else {
            if (index (attrs, ".") != 0) {
                attrs = "-rw-r--r--";
            }
        }

        ### and finally
        printf ("%s 1 %s %s %d %02d/%02d/%02d %s ./%s\n",
                attrs, uid, gid, size, date[2], date[3], date[1], time, name);
    }
'
}

mcrarfs_list ()
{
    [ x$UNRAR_VERSION = x5 ] && mcrar5fs_list "$@" || mcrar4fs_list "$@"
}

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 x"$di" != x"${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 -p- -c- -cfg- -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=`mktemp -d "${MC_TMPDIR:-/tmp}/mctmpdir-urar.XXXXXX"` || exit 1
    cd "$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 "$cmd" in
  # Workaround for a bug in mc - directories must precede files to
  # avoid duplicate entries, so we sort output by filenames
  list)    mcrarfs_list    "$@" | sort -k 8 ;;
  rm)      mcrarfs_rm      "$@" ;;
  rmdir)   mcrarfs_rm      "$@" ;;
  mkdir)   mcrarfs_mkdir   "$@" ;;
  copyin)  mcrarfs_copyin  "$@" ;;
  copyout) mcrarfs_copyout "$@" ;;
  *) exit 1 ;;
esac
exit 0