#!/bin/rc  rfork e. /rc/bin/apatch/defs args='patch-name'flagfmt=''if(! eval `'' {aux/getflags $*} || ! ~ $#* 1){	aux/usage	exit usage}mountfs -amountdist -w	# writable d=$PD/$1if(! $patch/okay $d){	echo 'bad patch: '$status >[1=2]	exit badpatch} if(test -e /n/dist/lib/patch.skip && grep -s '^'^$1^'$' /n/dist/lib/patch.skip){	echo patch $1 is a skip. done. >[1=2]	exit ''} echo  /dist/patch/$1 if(! test -d /n/dist/dist/patch/$1){	must mkdir -p /n/dist/dist/patch/$1	must dircp $d /n/dist/dist/patch/$1}d=/n/dist/dist/patch/$1must cd $d echo -n merge... >[1=2]fn xxx {	rm -rf $2.new	if(! test -e /n/dist$1 && test -e $2.orig){		echo $1 'locally removed (ignoring)'>[1=2]	}	if(test -e /n/dist$1 && ! test -e $2.orig){		echo fail: $1 locally created. remove and retry>[1=2]		applyfailed=locally	}	if(test -f /n/dist$1 && test -d $2.orig){		echo $1 is now a file.>[1=2]		applyfailed=file	}	if(test -d /n/dist$1 && test -f $2.orig){		echo $1 is now a directory>[1=2]		applyfailed=directory	}	if(test -f /n/dist$1 && test -f $2.orig){		errs=/tmp/apply.$pid		ape/diff3 -m /n/dist$1 $2.orig $2 >$2.new >[2]$errs		if(grep -s 'Binary' $errs){			rm -f $2.new			if(! cmp /n/dist$1 $2.orig>[2]/dev/null){				echo conflicts in binary file $1';' see `{pwd} >[1=2]				applyfailed=binary			}		}		if not{			if(grep -s '^<<<<' $2.new){				echo conflicts. see `{pwd}^/$2.new >[1=2]				echo diff -n `{pwd}^/$2 $1				echo diff -n `{pwd}^/$2.orig $1				applyfailed=text			}		}		rm -f $errs	}	if(test -d /n/dist$1 && test -d $2.orig){		diff -ncr /n/dist$1 $2.orig >$2.diffs		if(grep -s '^diff '  $2.diffs){			echo conflicts merging $1';' see `{pwd}^/$2.diffs >[1=2]			applyfailed=merge		}		if not {			mkdir -p $2.new			dircp $2.orig $2.new			dircp $2 $2.new		}	}} applyfailed=() {	if(test -e /lib/patch.skipfile)		grep -v -f /lib/patch.skipfile files	if not		cat files} | sed 's/^/xxx /' | rc if(! ~ $#applyfailed 0){	echo exiting without changes >[1=2]	exit failed} echo -n backup... >[1=2] fn xxx {	rm -rf $2.backup	test -e /n/dist$1 && cpfile /n/dist$1 $2.backup} if(test -e /lib/patch.skipfile){	grep -v -f /lib/patch.skipfile files | sed 's/^/xxx /' | rc}if not {	cat files | sed 's/^/xxx /' | rc}if(~ 0 never){	echo exiting without changes cannot backup: `{cat failed}>[1=2]	exit failed} echo  copy... >[1=2]fn xxx {	fdir=`{basename -d /n/dist$1}	if(! test -d $fdir){		echo mkdir $fdir >[1=2]		mkdir -p $fdir	}	echo cpfile $2 /n/dist$1 >[1=2]	if(test -e $2.new)		cpfile $2.new /n/dist$1	if not		cpfile $2 /n/dist$1	#BUG: update /n/dist/$1 permissions by looking at those of $2.orig}if(test -e /lib/patch.skipfile){	grep -v -f /lib/patch.skipfile files | sed 's/^/xxx /' | rc}if not {	cat files | sed 's/^/xxx /' | rc} fn xxx {	# echo cp $2.backup $1	if(test -e $2.backup)		cpfile $2.backup /n/dist$1	if not		rm -rf /n/dist$1}if(~ 0 never){	echo copying failed, restoring backups >[1=2]	if(test -e /lib/patch.skipfile){		grep -v -f /lib/patch.skipfile files | sed 's/^/xxx /' | rc	}	if not {		cat files | sed 's/^/xxx /' | rc	}	exit failed} mkdir $PD/applied/$1 && dircp $PD/$1 $PD/applied/$1 && rm -r $PD/$1 if(test -s removed){	echo '#' remove these files if you want. I will not remove them for you >[1=2]	echo '# ($patch/undo will not restore them)'>[1=2]	sed 's|^|rm -r /n/dist|' < removed}echo done>[1=2]