- while (( $# > 0 )); do
- if islinux; then
- cp -a "$1" "$1_$(date --iso-8601=m)"
- elif isopenbsd; then
- cp -R "$1" "$1_$(date "+%FT%H:%M")"
- else;
- echo 'sorry, not yet implemented, send a patch!' >&2
- fi
- shift
+ local current_date=$(date -u "+%Y-%m-%dT%H:%M:%SZ")
+ local keep move verbose result
+ usage() {
+ cat << EOT
+bk [-hcmv] FILE [FILE ...]
+Backup a file or folder in place and append the timestamp
+
+Usage:
+-h Display this help text
+-c Keep the file/folder as is, create a copy backup using cp(1) (default)
+-m Move the file/folder, using mv(1)
+-v Verbose
+
+The -c and -m options can't be used at the same time. If both specified, the
+last one is used.
+
+The return code is the sum of all cp/mv return codes.
+EOT
+ }
+ keep=1
+ while getopts ":hcmv" opt; do
+ case $opt in
+ c) unset move && (( ++keep ));;
+ m) unset keep && (( ++move ));;
+ v) verbose="-v";;
+ h) usage;;
+ \?) usage >&2; return 1;;
+ esac