File: ensure-dir.sh

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#!/bin/sh

pathname=$1
mode=$2
OLDIFS="${IFS}"; IFS=/; set $pathname; IFS="${OLDIFS}"

case $pathname in
	/*)	partial=/; ;;
	*)	partial=""; ;;
esac

for i do
	case i in "") continue; ;; esac
	partial="${partial}${i}"
	if [ ! -d ${partial} ]; then
		mkdir ${partial} || exit 1;
		chmod ${mode} ${partial}
	fi
	partial="${partial}/"
done