2ee11a5eac
Write the requests to all named pipes if the mod list begins with '>>* '. This feature will probably not be merged into the main branch because we have to search for the fifo files before each send, and if the daemon for this login session exits, the scheduler will continue running, which may not be desirable.
140 lines
3.8 KiB
Bash
Executable File
140 lines
3.8 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. 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="${mod_list:4}"
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is_request_all=1
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else
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fifo=/tmp/avdd-fifo-"$("$(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 - $(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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