#!/bin/ksh
# @(#) uudec.ksh 1.2 94/09/20
# 92/08/04 john@armory.com (John H. DuBois III)
# 93/11/22 Added help.
# 94/08/24 added d and p options.
# 94/09/20 Added stats and n & q options.

name=${0##*/}
Usage="Usage: $name [-hpn] [-d<dirname>] [file ...]"
NoPath=false
Debug=false
Stats=true
Quiet=false
OrigDir=$PWD

while getopts :hpd:xqn opt; do
    case $opt in
    h)
	echo \
"$name: process uuencoded files.
$Usage
If no filenames are given, the input is read for names.  More than one name
may be given on a line.  Each file is uudecoded individually.
Options:
-h: Print this help.
-p: Do not skip files that have a directory component.
-d<dirname>: extract files into directory <dirname>.
-n: Do not print uudecoding success statistics, as is normally done if more
    than one file is processed.
-q: Print single-character abbreviations for per-file error messages."
	exit 0
	;;
    p)	NoPath=false;;
    n)	Stats=false;;
    q)	Quiet=true;;
    d)	cd "$OPTARG";;
    x)	Debug=true;;
    +?)
	print -u2 "$name: options should not be preceded by a '+'."
	exit 1
	;;
    :) 
	print -r -u2 -- \
	"$name: Option '$OPTARG' requires a value.  Use -h for help."
	exit 1
	;;
    ?) 
	print -u2 "$name: $OPTARG: bad option.  Use -h for help."
	exit 1
	;;
    esac
done
 
DecodeFiles() {
    for f in "$@"; do
	$Quiet || print -u2 -n "$f: "
	[[ "$f" != /* ]] && InFile="$OrigDir/$f" || InFile=$f
	FoundBegin=false
	egrep '^(begin |end)' "$InFile" |
	while read b mode filename; do
	    if $FoundBegin; then
		[ "$b" = end ] && break
	    elif [ "$b" = begin ]; then
		FoundBegin=true
		if $NoPath && [[ "$filename" = */* ]]; then
		    $Quiet && print -nu2 / || print -u2 \
		    "Output filename '$filename' contains '/'; not written."
		    ((BadNameCt+=1))
		    continue 2
		elif [ -f "$filename" ]; then
		    $Quiet && print -nu2 x || 
		    print -u2 "Output file '$filename' exists; not written."
		    ((FileExistsCt+=1))
		    continue 2
		else 
		    $Debug && print -u2 "Output filename: $filename"
		fi
		File=$filename
	    fi
	done
	if $FoundBegin && [ "$b" = end ]; then
	    if uudecode "$InFile"; then
		$Quiet && print -nu2 + || print -u2 "Done."
		((DecodeCt+=1))
	    else
		$Quiet && print -nu2 ! || print -u2 "uudecode failed."
		((FailCt+=1))
	    fi
	else
	    if $FoundBegin; then
		$Quiet && print -nu2 e || print -u2 "No end line."
		((NoEndCt+=1))
	    else
		$Quiet && print -nu2 b || print -u2 "No begin line."
		((NoBeginCt+=1))
	    fi
	fi
    done
}

function Finish {
    $FinishDone && return

    typeset -i Tot=0

    $Quiet && print -u2 ""

    if $Stats; then
	set -- "No begin line" "No end line" "File exists" "Bad filename" \
	Successful "Decode failed"
	for StatName in $StatNames; do
	    eval "[ $StatName -gt 0 ] && print \"$1:\t\$$StatName\";
	    let Tot+=$StatName"
	    shift
	done
	print "Total:\t\t$Tot"
    fi
    FinishDone=true
}

# remove args that were options
let OPTIND=OPTIND-1
shift $OPTIND

StatNames="NoBeginCt NoEndCt FileExistsCt BadNameCt DecodeCt FailCt"
for StatName in $StatNames; do
    eval typeset -i $StatName
done

FinishDone=false
trap Finish INT

if [ $# -gt 0 ]; then
    DecodeFiles "$@"
else
    while read line; do
	DecodeFiles $line
    done
fi

Finish