Created
July 12, 2016 16:26
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checks if a program is running, if not, it tries to start it. # after 3 tries, if the program hasn't started we print out the error # and return.
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#!/bin/sh | |
# checks if a program is running, if not, it tries to start it. | |
# after 3 tries, if the program hasn't started we print out the error | |
# and return. | |
errors="" | |
# uses pgrep to find the running process. | |
check_prog () | |
{ | |
if [ $count -eq 3 ] | |
then | |
printf "\t *** issue starting:'$1',\t '$errors' \n" | |
return | |
else | |
count=$(expr $count + 1) | |
fi | |
if [ $(pgrep -x "$1") ] | |
then | |
printf "\t * %-20s (running: %10s\n" "$1" "pid: $(pgrep -x "$1"))" | |
else | |
if [ $count -eq 1 ] | |
then | |
printf "\t * $1 not running, starting up\n" | |
fi | |
errors=$($1 2>&1) | |
check_prog $1 | |
fi | |
} | |
# uses grep to find the running process. | |
# this allows one to give a fuzzy match for the running program | |
# | |
# in the case of beet bpd, it's grep shows up as | |
# 22695 pts/9 Sl 0:02 /usr/bin/python /usr/local/bin/beet bpd | |
# doing pgrep 'beet bpd' won't find the process due to the /usr/bin/python junk. | |
# this method also support command line arguemnts which check_prog does not. | |
check_prog_grep () | |
{ | |
if [ $count -eq 3 ] | |
then | |
printf "\t *** issue starting:'$1',\t '$errors' \n" | |
return | |
else | |
count=$(expr $count + 1) | |
fi | |
# if [ $(pgrep -x "$1") ] | |
running="$(ps ax | grep "$*" | grep -v "grep $*")" | |
if [ "$running" ] | |
then | |
PID=$(echo "$running" | cut -d " " -f1) | |
printf "\t * %-20s (running: %10s\n" "$*" "pid: $PID)" | |
else | |
if [ $count -eq 1 ] | |
then | |
printf "\t * $* not running, starting up\n" | |
fi | |
($* > /dev/null &) | |
check_prog_grep $* | |
fi | |
} | |
count=0 | |
check_prog_grep beet bpd | |
count=0 | |
check_prog mpdscribble |
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