140 lines
3.8 KiB
Bash
Executable File
140 lines
3.8 KiB
Bash
Executable File
#!/usr/bin/env 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. If mod_list begins this '>>* ', then
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requests are sent to all running daemons.
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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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Send the previous requests to all running daemons.
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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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# Convert integer milliseconds to floating point seconds
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ms_to_s() {
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printf '%.3f' "${1}e-3"
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}
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# Validate the number arguments
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if [[ "$#" -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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mod_list="$1"
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# Check if the user needs help
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if [[ "${mod_list}" =~ ^(-h|-(-)?help)$ ]]; then
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printf '%s' "${USAGE}" 1>&2
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exit 0
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fi
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# Check if we will be sending requests to all daemons, or set the named pipe
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# for this login session
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if [[ "${mod_list}" =~ ^\>\>\*\ ]]; then
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mod_list="${mod_list:4}"
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is_request_all=1
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else
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fifo="/tmp/${DAEMON}-fifo-$("$(dirname "$0")/rpid" $$)"
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fi
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when="${2:-0}"
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# Validate when
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if [[ ! "${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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repeat="$3"
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# Write to the pipe if this is the first run or if repeat is on
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first_run=1
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while [[ "${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 $((60 - 10#$(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 $(((24 - hms[0]) * 3600 - hms[1] * 60 - hms[2]))
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;;
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*)
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;;
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esac
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fi
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fi
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# Write each command to the named pipe for this login session
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if [[ ! -v is_request_all ]]; then
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if [[ ! -p "${fifo}" ]]; then
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printf 'The daemon %s is not running\n' "${DAEMON}" 1>&2
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exit 1
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fi
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printf '%s\n' "${mod_list}" >> "${fifo}"
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# Write each command to all the daemon named pipes
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else
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readarray -d '' fifos \
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< <(find /tmp -maxdepth 1 -type p -name "${DAEMON}-fifo-*" -print0)
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if [[ "${#fifos[@]}" -eq 0 ]]; then
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printf 'There are no daemons running\n' 1>&2
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exit 1
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fi
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for fifo in "${fifos[@]}"; do
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printf '%s\n' "${mod_list}" >> "${fifo}"
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done
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fi
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done
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