#!/bin/sh

# Description:
# This is a parser for Amiga ADF disk images in Midnight Commander. You 
# need the GPL unADF program (part of ADFlib >= 0.7.9b) written by Laurent 
# Clevy and Dan Sutherland.

# Author: Guus Jansman

# Limitations:
# Some files seem to have a description. These are not handled (yet).
# Files can only be added as root (under Linux only so disabled now).
# File attributes are not preserved.

# Alternative programs (not supported by this script):
# AdfOpus (win32, Dan Sutherland and Gary Harris)
# readdisk (part of UAE)

# Settings:
UNADF="unadf"
TEMPDIR=/tmp/mctmpdir-mcadf.$USER.${RANDOM}

mcadffs_list ()
{
    $UNADF -lr "$1" 2>/dev/null | gawk -v uid=${UID-0} '
    BEGIN { date="JanFebMarAprMayJunJulAugSepOctNovDec" }
    /^$/ { next }
    /^unADF/ { next }
    /^compsum/ { next }
    /^Device/ { next }
    /^Volume/ { next }
    /^Warning/ { next }
    {
        slashpos=index($0, "/")
        str=substr($0, slashpos+18)
        if (substr(str, length(str)) == "/")
        {
            perm="drwxr-xr-x"
            str=substr(str, 1, length(str)-1)
			sz=0
        }
        else
        {
            perm="-rw-r--r--"
			sz=substr($0, 1, slashpos-5)
        }
        tm=substr($0, slashpos+8, 5)
        dt=substr($0, slashpos-4, 10)
        split(dt, a, "/")
        printf "%s    1 %-8d %-8d %8d %3s %2d %4d %s %s\n", perm, uid, 0, sz, substr(date, (a[2]-1)*3+1, 3), a[3], a[1], tm, str
    }'
}

mcadffs_copyout ()
{
    $UNADF -p "$1" "$2" > "$3" 2>/dev/null
}

mcadffs_test ()
{
    if $UNADF -l "$1" >/dev/null 2>&1; then
        echo "OK"
    else
        echo "UNKNOWN"
    fi
}

# This can usually only be performed as root (Linux only).
mcadffs_copyin ()
{
    mkdir $3.mnt
    mount -n -w "$1" $3.mnt -t affs -o loop
    cp -a -f $3 "$3.mnt/$2"
    umount -n $3.mnt
    rmdir $3.mnt
}

# This can usually only be performed as root (Linux only).
mcadffs_rm ()
{
    mkdir $TEMPDIR
    mount -n -w "$1" $TEMPDIR -t affs -o loop
    rm -f "$TEMPDIR/$2"
    umount -n $TEMPDIR
    rmdir $TEMPDIR
}

umask 077

cmd=$1
shift
case "$cmd" in
    list)    mcadffs_list    "$@" ;;
    copyout) mcadffs_copyout "$@" ;;
#    copyin)  mcadffs_copyin  "$@" ;;        # Can only be performed as root
#    rm)      mcadffs_rm      "$@" ;;        # Can only be performed as root
#    test)    mcadffs_test    "$@" ;;        # Not supported by MC extfs
    *)       exit 1 ;;
esac
exit 0