telegram-bot-bash/modules/background.sh
Kay Marquardt (Gnadelwartz) 6b886562f7 sync with master
2019-05-24 16:21:51 +02:00

143 lines
3.1 KiB
Bash

#!/bin/bash
# file: modules/background.sh
# do not edit, this file will be overwritten on update
# This file is public domain in the USA and all free countries.
# Elsewhere, consider it to be WTFPLv2. (wtfpl.net/txt/copying)
#
#### $$VERSION$$ v0.90-dev-18-g0f6864f
# source from commands.sh if you want ro use interactive or background jobs
######
# interactive and background functions
# old syntax as aliases
background() {
start_back "${CHAT[ID]}" "$1" "$2"
}
startproc() {
start_proc "${CHAT[ID]}" "$1" "$2"
}
checkback() {
check_back "${CHAT[ID]}" "$1"
}
checkproc() {
check_proc "${CHAT[ID]}" "$1"
}
killback() {
kill_back "${CHAT[ID]}" "$1"
}
killproc() {
kill_proc "${CHAT[ID]}" "$1"
}
# inline and backgound functions
# $1 chatid
# $2 program
# $3 jobname
start_back() {
local fifo; fifo="${TMPDIR:-.}/$(procname "$1")"
printf '%s\n' "$1:$3:$2" >"${fifo}$3-back.cmd"
start_proc "$1" "$2" "back-$3-"
}
# $1 chatid
# $2 program
# $3 prefix
start_proc() {
[ "$2" = "" ] && return
[ -x "${2%% *}" ] || return 1
local fifo; fifo="${TMPDIR:-.}/$(procname "$1" "$3")"
kill_proc "$1" "$3"
mkfifo "${fifo}"
nohup bash -c "{ tail -f < \"${fifo}\" | $2 \"\" \"\" \"$fifo\" | \"${SCRIPT}\" outproc \"${1}\" \"${fifo}\"
rm \"${fifo}\"; [ -s \"${fifo}.log\" ] || rm -f \"${fifo}.log\"; }" &>>"${fifo}.log" &
}
# $1 chatid
# $2 jobname
check_back() {
check_proc "$1" "back-$2-"
}
# $1 chatid
# $2 prefix
check_proc() {
[ "$(proclist "$(procname "$1" "$2")")" != "" ]
# shellcheck disable=SC2034
res=$?; return $?
}
# $1 chatid
# $2 jobname
kill_back() {
kill_proc "$1" "back-$2-"
rm -f "${TMPDIR:-.}/$(procname "$1")$2-back.cmd"
}
# $1 chatid
# $2 prefix
kill_proc() {
local fifo prid
fifo="$(procname "$1" "$2")"
prid="$(proclist "${fifo}")"
fifo="${TMPDIR:-.}/${fifo}"
# shellcheck disable=SC2086
[ "${prid}" != "" ] && kill ${prid}
[ -s "${fifo}.log" ] || rm -f "${fifo}.log"
[ -p "${fifo}" ] && rm -f "${fifo}";
}
# $1 chat
# $2 message
send_interactive() {
local fifo; fifo="${TMPDIR:-.}/$(procname "$1")"
[ -p "${fifo}" ] && printf '%s\n' "$2" >"${fifo}" & # not blocking!
}
# old style but may not work because of local checks
inproc() {
send_interactive "${CHAT[ID]}" "${MESSAGE}"
}
# start stopp all jobs
# $1 command
# killb*
# suspendb*
# resumeb*
job_control() {
local content proc CHAT job fifo killall=""
for FILE in "${TMPDIR:-.}/"*-back.cmd; do
[ "${FILE}" = "${TMPDIR:-.}/*-back.cmd" ] && echo -e "${RED}No background processes.${NC}" && break
content="$(< "${FILE}")"
CHAT="${content%%:*}"
job="${content#*:}"
proc="${job#*:}"
job="back-${job%:*}-"
fifo="$(procname "${CHAT}" "${job}")"
case "$1" in
"resumeb"*|"backgr"*)
echo "Restart Job: ${proc} ${fifo}"
start_proc "${CHAT}" "${proc}" "${job}"
;;
"suspendb"*)
echo "Suspend Job: ${proc} ${fifo}"
kill_proc "${CHAT}" "${job}"
killall="y"
;;
"killb"*)
echo "Kill Job: ${proc} ${fifo}"
kill_proc "${CHAT}" "${job}"
rm -f "${FILE}" # remove job
killall="y"
;;
esac
done
# kill all requestet. kill ALL background jobs, even not listed in data-bot-bash
[ "${killall}" = "y" ] && killallproc "back-"
}