35 lines
753 B
Bash
Executable File
35 lines
753 B
Bash
Executable File
#!/bin/sh
|
|
|
|
if [ $# -ne 2 ] || [ "$1" = "-h" ] ; then
|
|
cat<<EOF
|
|
Usage: ${1##*/} FILE1 FILE2
|
|
|
|
Swap 2 filenames around.
|
|
|
|
EOF
|
|
|
|
exit
|
|
fi
|
|
|
|
## We need a temp file is case both files are in the same folder. We use the
|
|
## unsecure option since we do not want to create a empty file in
|
|
## advance. Indeed, creating a file with mktemp is problematic for folders since
|
|
## non-GNU mv can only move _into_ an existing folder. But we do not overwrite
|
|
## if file exists.
|
|
TEMPFILE="$(mktemp -u "$1.XXXXXX")"
|
|
|
|
case "$1" in
|
|
*/*) DIR1="${1%/*}" ;;
|
|
*) DIR1="." ;;
|
|
esac
|
|
case "$2" in
|
|
*/*) DIR2="${2%/*}" ;;
|
|
*) DIR2="." ;;
|
|
esac
|
|
|
|
if ! mv -n "$1" "$TEMPFILE"; then
|
|
echo >&2 "Race condition, exiting. Try again."
|
|
fi
|
|
mv -n "$2" "$DIR2/${1##*/}"
|
|
mv -n "$TEMPFILE" "$DIR1/${2##*/}"
|