Created
October 4, 2014 21:11
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Timestamp (prefix) files with their modification date
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| #!/bin/sh | |
| # mstamp.sh: prefix each file with its modified date | |
| # ================================================================== | |
| function _mt() { | |
| echo $(/usr/bin/stat -t $1 -f %Sm "$2") | |
| } | |
| function _usage() { | |
| cat <<EOF | |
| mstamp.sh | |
| Timestamp (prefix) files with their modification date | |
| USAGE | |
| mstamp.sh [options] <files...> | |
| OPTIONS | |
| -h Help: print this help and exit | |
| -v Verbose: print each rename | |
| -n Dry Run: don't actually apply the timestamp | |
| The following options control the format used to create the timestamp: | |
| -l Long: "YYYY-mm-dd_" | |
| -s Short: "YYYYmmdd-" (default) | |
| -t Time: "YYYYmmdd_HHMM-" | |
| -f Custom: Supply your own, as used by /usr/bin/stat | |
| EOF | |
| } | |
| # ================================================================== | |
| STATUS=0 | |
| DRY_RUN= | |
| VERBOSE= | |
| FMT="%Y%m%d-" | |
| while getopts hnvltsf: o | |
| do | |
| case "$o" in | |
| h ) _usage; exit 0 ;; | |
| n ) DRY_RUN=1 ;; | |
| v ) VERBOSE=1 ;; | |
| l ) FMT="%Y-%m-%d_" ;; | |
| t ) FMT="%Y%m%d_%H%M-" ;; | |
| s ) FMT="%Y%m%d-" ;; | |
| f ) FMT="$OPTARG" ;; | |
| esac | |
| done | |
| [ $OPTIND -gt 1 ] && shift $(( $OPTIND - 1 )) | |
| [ "$#" -lt 1 ] && _usage && exit 1 | |
| # ------------------------------------------------------------------ | |
| # backup the 'field separator' characters and remove spaces from current IFS. | |
| # this allows handling of files with spaces. | |
| SAVEIFS=$IFS | |
| IFS=$'\t\n' | |
| # this for loop iterates through all of the files that we gave the program | |
| # it does one rename per file given | |
| for file in $* | |
| do | |
| if [ -f $file -o -d $file ]; then | |
| target=$(_mt $FMT "$file")"${file}" | |
| if [ $DRY_RUN ]; then | |
| echo ${file} " ~~> " ${target} | |
| else | |
| if [ $VERBOSE ]; then | |
| echo ${file} " --> " ${target} | |
| fi | |
| mv -i ${file} ${target} | |
| fi | |
| else | |
| echo "${file} is not a file." >&2 | |
| STATUS=1 | |
| fi | |
| done | |
| # reset the IFS | |
| IFS=$SAVEIFS | |
| exit $STATUS | |
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