8669361595
Use rpid in the daemon and the scheduler to append the PID of their common login process to the named pipe so daemons and schedulers in other sessions won't conflict with one another.
113 lines
3.1 KiB
Bash
Executable File
113 lines
3.1 KiB
Bash
Executable File
#!/bin/bash
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USAGE="
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USAGE: avds <mod_list|-h|-[-]help> [<when>] [<repeat>]
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mod_list
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A comma or space separated list of modules to request that
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the daemon execute.
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when The integer number of milliseconds to wait before sending the
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request, or one of the following values:
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- m to send the update request at the top of the next minute
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- h to send the update request at the top of the next hour
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- d to send the update request at the top of the next day
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If not present, the request will be sent immediately.
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repeat If present, the request will be sent repeatedly according
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to <when>.
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EXAMPLES:
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Any of these will display this help message.
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avds -h
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avds -help
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avds --help
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If there are volume and backlight modules named 'vol' and 'bl' that
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update the volume and backlight statuses, send a requst to update
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both of those statuses immediately.
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avds 'vol,bl'
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If there are cpu and memory usage modules named 'cpu' and 'mem'
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that update the cpu and memory usage statuses, send a requst to
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update both of those statuses every 5 seconds.
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avds 'cpu,mem' 5000 1
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If there are battery and date/time modules named 'bat' and 'dt'
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that update the battery and date/time statuses, send a requst to
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update both of those statuses at the top of every minute.
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avds 'bat,dt' m true
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"
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DAEMON=avdd
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FIFO=/tmp/"${DAEMON}"-fifo-"$("$(dirname "$0")"/rpid $$)"
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# Convert integer milliseconds to floating point seconds
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ms_to_s () {
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printf '%.3f' "${1}e-3"
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}
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# Validate the arguments
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if [[ "$#" -lt 1 || "$#" -gt 3 ]]; then
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printf '%s' "${USAGE}" 1>&2
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exit 128
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fi
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IFS=', ' read -r -a mods <<< "$1"
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# Check if the user needs help
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# shellcheck disable=SC2128
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if [[ "${mods}" =~ ^(-h|-(-)?help)$ ]]; then
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printf '%s' "${USAGE}" 1>&2
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exit 0
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fi
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when="${2:-0}"
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repeat="$3"
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if [[ ! "${when}" =~ ^[0-9]+|[mhd]$ ]]; then
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printf 'Invalid argument <when>: %s\n' "${when}" 1>&2
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exit 128
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fi
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# Write to the pipe if this is the first run or if repeat is on
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first_run=1
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while [[ "${first_run}" -eq 1 || -n "${repeat}" ]]; do
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first_run=0
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# Sleep until it's time to write to the pipe
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if [[ "${when}" != '0' ]]; then
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if [[ "${when}" =~ ^[0-9]+$ ]]; then
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sleep "$(ms_to_s "${when}")"
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else
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case "${when}" in
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m)
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sleep $((60 - $(date +%S)))
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;;
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h)
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readarray -t ms < <(date +'%M%n%S')
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sleep $((3600 - ms[0] * 60 - ms[1]))
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;;
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d)
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readarray -t hms < <(date +'%H%n%M%n%S')
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sleep $(((24 - hms[0]) * 3600 - hms[1] * 60 - hms[2]))
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;;
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*)
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;;
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esac
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fi
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fi
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# Write each command to the pipe
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if [[ ! -p "${FIFO}" ]]; then
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printf 'The daemon %s is not running\n' "${DAEMON}" 1>&2
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exit 1
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fi
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for mod in "${mods[@]}"; do printf '%s\n' "${mod}" >> "${FIFO}"; done
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done
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