shithub: cc65-plan9

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Create RAM-backed mountpoint when directory doesn't exist

--- a/overlay

+++ b/overlay

@@ -1,4 +1,5 @@

-#!/bin/rc

+#!/bin/rc -e

+# Overlays a directory tree over another

 fn usage {

 	echo usage: $0 [-u] source target >[1=2]

@@ -24,14 +25,19 @@

 	usage

 files=`{walk -f $source}

-mtpts=`{for(file in $files) basename -d $file | sed s@$source@$target@g}

+mtpts=`{{for(file in $files) basename -d $file} | sort | uniq | sed 's@^'$source@$target@g}

 for(mtpt in $mtpts)

 	switch($mode) {

 	case bind

-		bind -cq $mtpt $mtpt || status=''

+		if(test -d $mtpt)

+			bind -cq $mtpt $mtpt || status=''

+		if not { # This might not be desirable

+			aux/stub -d $mtpt

+			ramfs -m $mtpt

+		}

 	case unbind

-		unmount $mtpt >/dev/null >[2=1]  || status=''

+		unmount $mtpt >/dev/null >[2=1] || status=''

 	}

 if(~ $mode bind)

@@ -42,4 +48,3 @@

 	}

 if not

 	status=''

-