autoconf/config/move-if-change
Paul Eggert 0846cebb13 * config/move-if-change: Don't output "$2 is unchanged";
suggested by Ben Elliston.  Handle weird characters correctly.
2005-09-06 20:00:24 +00:00

23 lines
384 B
Bash
Executable File

#!/bin/sh
# Like mv $1 $2, but if the files are the same, just delete $1.
# Status is zero if successful, nonzero otherwise.
usage="$0: usage: $0 SOURCE DEST"
case $# in
2) ;;
*) echo "$usage" >&2; exit 1;;
esac
for arg in "$1" "$2"; do
case $arg in
-*) echo "$usage" >&2; exit 1;;
esac
done
if test -r "$2" && cmp -s "$1" "$2"; then
rm -f "$1"
else
mv -f "$1" "$2"
fi