[thirdparty/gcc.git] / move-if-change

#!/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
Commit	Line	Data
6599da04	1	#!/bin/sh
67dc1785 BE	2	# Like mv $1 $2, but if the files are the same, just delete $1.
67dc1785 BE	3	# Status is zero if successful, nonzero otherwise.
6599da04	4
67dc1785	5	usage="$0: usage: $0 SOURCE DEST"
6599da04	6
67dc1785 BE	7	case $# in
	8	2) ;;
	9	*) echo "$usage" >&2; exit 1;;
	10	esac
	11
	12	for arg in "$1" "$2"; do
	13	case $arg in
	14	-*) echo "$usage" >&2; exit 1;;
	15	esac
	16	done
	17
	18	if test -r "$2" && cmp -s "$1" "$2"; then
	19	rm -f "$1"
6599da04	20	else
67dc1785	21	mv -f "$1" "$2"
6599da04	22	fi