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local editor=${VISUAL:-${EDITOR:-vi}}
local line calendar
local -a lockfiles
integer cal_running
sched | while read line; do
[[ $line = *" calendar -s "<->" "<-> ]] && (( cal_running = 1 ))
done
zstyle -s ':datetime:calendar:' calendar-file calendar || calendar=~/calendar
{
calendar_lockfiles $calendar || return 1
eval $editor \$calendar
} always {
(( ${#lockfiles} )) && rm -f $lockfiles
}
(( cal_running )) && calendar -s
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