111 lines
2.7 KiB
Plaintext
111 lines
2.7 KiB
Plaintext
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#!/bin/bash
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# vim:textwidth=80:tabstop=4:shiftwidth=4:smartindent
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#
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# this scripts prompts the user thrice, then tells asterisk to please shut down,
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# then kills asterisk and related processes with SIGTERM, then kills asterisk
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# and related processes with SIGKILL, and then starts asterisk with
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# safe_asterisk. Three arguments are currently supported, --no-countdown,
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# --no-prompt and --no-stop-now-first
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LOGFILE=/var/log/asterisk/safe_asterisk_restart.log
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ASTERISK=/usr/sbin/asterisk
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SAFE_ASTERISK=/usr/sbin/safe_asterisk
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DELAY=1 # Seconds between steps in countdown
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COUNTDOWN_FROM=5 # Steps to count down
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DO_COUNTDOWN=1 # Should I do a countdown before restarting asterisk?
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DO_PROMPT=1 # Should I prompt the user?
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TRY_STOP_NOW_FIRST=1 # Attempt a 'stop now' before killing processes. Note
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# that this might make this script hang if asterisk
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# can't respond to the command.
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# processes to kill. Please list all AGI scripts here as well as the asterisk
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# processes, since asterisk may leave them unkilled.
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PROCVICTIMS="safe_asterisk asterisk mpg123"
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# helper functions
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# die ["string to print"]
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function die {
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if [[ "$1" != "" ]]; then
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echo $1
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else
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echo "ok. no harm done..."
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fi
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exit
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}
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# docmd "string to print" "cmd"
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function docmd {
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printf "$1..."
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`$2 >> $LOGFILE 2>&1`
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RETCODE=$?
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sleep $DELAY
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if [[ "$RETCODE" == "0" ]]; then
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echo " OK"
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else
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echo " FAILED"
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fi
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}
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# prompt "string" "positive answer"
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function prompt {
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printf "$1"
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read answer
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if [[ "$answer" != "$2" ]]; then
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die
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fi
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}
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# countdown secs
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function countdown {
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echo -n "$1 "
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if [[ $1 > 0 ]]; then
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sleep 1
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countdown $[ $1 - 1 ]
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else
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echo "boom!"
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fi
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}
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# am I really root?
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if [[ "$UID" != "0" ]]; then
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echo "Sorry, only root can do this." >&2
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exit;
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fi
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echo "`date`: $0 invoked" >> $LOGFILE
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# bash
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for i
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do
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if [[ "$i" == "--no-countdown" ]]
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then
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unset DO_COUNTDOWN
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fi
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if [[ "$i" == "--no-prompt" ]]
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then
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unset DO_PROMPT
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fi
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if [[ "$i" == "--no-stop-now-first" ]]
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then
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unset TRY_STOP_NOW_FIRST
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fi
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done
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[[ $DO_PROMPT ]] && prompt "Are you sure you want to restart asterisk? (yes/no)? " "yes"
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[[ $DO_PROMPT ]] && prompt "Really sure? (yes/no)? " "yes"
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[[ $DO_PROMPT ]] && prompt "Absolutely positive? (YES/no)? " "YES"
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[[ $DO_COUNTDOWN ]] && echo "OK, I'll do it, but if you're not sure about this, press ctrl+c now."
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[[ $DO_COUNTDOWN ]] && countdown $COUNTDOWN_FROM
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# doing the dirty work
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[[ $TRY_STOP_NOW_FIRST ]] && docmd "Asking asterisk kindly to shutdown" "$ASTERISK -rx 'stop now'"
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docmd "Sending asterisk processes the TERM signal" "pkill -15 $PROCVICTIMS"
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docmd "Sending asterisk processes KILL signal" "pkill -9 $PROCVICTIMS"
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docmd "Starting safe_asterisk" "$SAFE_ASTERISK"
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for i in $PROCVICTIMS
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do
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ps axf | grep -w $i | grep -v grep
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done
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