#!/bin/bash
#\- convert msdos or cpm or macos files to unix
#usage: %intounix  [filelist]
#convert ascii input from msdos or cpm or macos to unix format:
#strip high bits, convert cr[cr...]lf to lf, quit at first ^Z eof;
#for macos, convert cr to lf;
#use as filter: read from stdin, write to stdout;
#or use to convert all files in filelist;
#NOTE: converted file overwrites original if input from filelist;
#uses sys5 echo and tr;
#j.a. rupley, tucson, arizona
#rupley!local@cs.arizona.edu

CR=`echo "\r\c"`
CTRLZ=`echo "\032\c"`

if [ $# -gt 0 ]
then
	for i
	do
		if [ -f $i ]
		then
			/usr/bin/tr "[\201-\377]" "[\1-\177]"  <$i >temp$$ &&
				/usr/bin/sed "{
					s/$CR*$//
					/$CTRLZ/{
						s/$CR*$CTRLZ.*//
						q
						}
					}" <temp$$ | 
				/usr/bin/tr "\015" "\012" >$i
			if [ $? -eq 0 ]
			then
				/bin/echo "$i converted"
				/bin/rm -f temp$$
			else
				/bin/echo "$i conversion failed -- see temp$$"
				exit 1
			fi
		fi
	done
else
	/usr/bin/tr "[\201-\377]" "[\1-\177]"  |
		/usr/bin/sed "{
			s/$CR*$//
			/$CTRLZ/{
				s/$CR*$CTRLZ.*//
				q
				}
			}" | 
		/usr/bin/tr "\015" "\012" 
fi