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#!/bin/sh
usage() {
echo "usage: $0 [-D] [-l] [-m mode] src dst" 1>&2
exit 1
}
mkdirp=false
symlink=false
mode=0755
while getopts Dlm: name ; do
case "$name" in
D) mkdirp=true ;;
l) symlink=true ;;
m) mode=$OPTARG ;;
?) usage ;;
esac
done
shift $(($OPTIND - 1))
test "$#" -eq 2 || usage
src=$1
dst=$2
tmp="$dst.tmp.$$"
case "$dst" in
*/) echo "$0: $dst ends in /" 1>&2 ; exit 1 ;;
esac
set -C
set -e
if $mkdirp ; then
umask 022
case "$2" in
*/*) mkdir -p "${dst%/*}" ;;
esac
fi
trap 'rm -f "$tmp"' EXIT INT QUIT TERM HUP
umask 077
if $symlink ; then
ln -s "$src" "$tmp"
else
cat < "$1" > "$tmp"
chmod "$mode" "$tmp"
fi
mv -f "$tmp" "$dst"
if test -d "$dst" ; then
rm -f "$dst/$(basename $tmp)"
if $symlink ; then
mkdir "$tmp"
ln -s "$src" "$tmp/$(basename $dst)"
mv -f "$tmp/$(basename $dst)" "${dst%/*}"
rmdir "$tmp"
else
echo "$0: $dst is a directory" 1>&2
exit 1
fi
fi