Command-line script for displaying world clocks, allows zonefiles or zone names inputs.
Forked from Gist, which was from an Stackoverflow answer.
Heavily modified by Yu-Jie Lin.
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Command-line script for displaying world clocks, allows zonefiles or zone names inputs.
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| #!/bin/sh | |
| # Command-line world clock | |
| # Taken from http://stackoverflow.com/questions/370075/command-line-world-clock | |
| # Modified by Yu-Jie Lin | |
| # usage: | |
| # cliclock.sh [[zonefile|zonename] ...] | |
| # | |
| # zonename can be full or partial, e.g. America/New_York or 'new york' | |
| # | |
| # default ~/.worldclock.zones and zonefile looks like: | |
| # US/Pacific | |
| # Europe/Berlin | |
| # Chile/Continental | |
| # new york | |
| # Los Angeles | |
| : ${WORLDCLOCK_FORMAT:='%Y-%m-%d %H:%M:%S %Z'} | |
| if (( $# == 0 )); then | |
| : ${WORLDCLOCK_ZONES:=$HOME/.worldclock.zones} | |
| if [[ ! -f $WORLDCLOCK_ZONES ]]; then | |
| echo 'no zones to display' >&2 | |
| exit 1 | |
| fi | |
| OLDIFS="$IFS" | |
| IFS=$'\n' | |
| WORLDCLOCK_ZONES=($(cat "$WORLDCLOCK_ZONES")) | |
| IFS="$OLDIFS" | |
| else | |
| while (( $# > 0)); do | |
| if [[ -f "$1" ]]; then | |
| OLDIFS="$IFS" | |
| IFS=$'\n' | |
| WORLDCLOCK_ZONES=("${WORLDCLOCK_ZONES[@]}" $(cat "$1")) | |
| IFS="$OLDIFS" | |
| else | |
| WORLDCLOCK_ZONES=("${WORLDCLOCK_ZONES[@]}" "$1") | |
| fi | |
| shift | |
| done | |
| fi | |
| ZONEINFO='/usr/share/zoneinfo/' | |
| VALID_ZONES=($(find "$ZONEINFO" -path '*/right' -prune -o -type f | sed "s|^$ZONEINFO||")) | |
| shopt -s nocasematch | |
| # Checking zones and set the max length | |
| check_zone() { | |
| local zone z | |
| ret= | |
| z="*${1// /?}*" | |
| for zone in "${VALID_ZONES[@]}"; do | |
| if [[ $zone == $z ]]; then | |
| ret="$zone" | |
| return | |
| fi | |
| # match first zone with $zone as substring | |
| if [[ ! -z $ret ]] && [[ $zone == $z ]]; then | |
| ret="$zone" | |
| fi | |
| done | |
| } | |
| zones=() | |
| MAX_ZONE_LEN=0 | |
| for zone in "${WORLDCLOCK_ZONES[@]}"; do | |
| check_zone "$zone" | |
| if [[ -z $ret ]]; then | |
| echo invalid zone $zone >&2 | |
| continue | |
| fi | |
| zone="$ret" | |
| zones=("${zones[@]}" "$zone") | |
| (( ${#zone} > MAX_ZONE_LEN )) && MAX_ZONE_LEN=${#zone} | |
| done | |
| unset VALID_ZONES | |
| if (( ${#zones[@]} == 0 )); then | |
| echo 'no zones to display' >&2 | |
| exit 1 | |
| fi | |
| # Some zones are invalid, keep error message for 3 seconds | |
| (( ${#zones[@]} != ${#WORLDCLOCK_ZONES[@]} )) && sleep 3 | |
| unset WORLDCLOCK_ZONES | |
| while :; do | |
| clear | |
| printf -v now '%(%s)T' -1 | |
| for zone in "${zones[@]}"; do | |
| TZ=$zone printf "%-${MAX_ZONE_LEN}s %($WORLDCLOCK_FORMAT)T\n" "$zone" "$now" | |
| done | |
| # Allow to elegantly quit this script | |
| if read -n 1 -t 1 -s; then | |
| case "$REPLY" in | |
| q|Q) | |
| break | |
| ;; | |
| esac | |
| fi | |
| done |
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