Condition sometimes failing to test if a specific process is running or not
0
I can't understand why my script, sometimes, won't recognize if my Firefox is running. Analyzing the stdout I could state that this condition (if ps cax | grep firefox > /dev/null) sometimes is skipped even when my Firefox is running.
Currently using Xubuntu 18.10 Livecd
The script called at startup.
#!/bin/bash
[[ -f /home/xubuntu/controle_memoria.lock ]] && exit 1
> /home/xubuntu/controle_memoria.lock
while true ; do
free=`free -m | grep Mem | awk '{print $4}'`
if [ "$free" -gt 0 ]
then
if [ $free -le 120 ]; #When my memory consuptiom goes below 120MB do the commands below.
then
if ps cax | grep firefox > /dev/null
then
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
sudo sysctl -w vm.drop_caches=3
sudo sync && echo 3 | sudo tee /proc/sys/vm/drop_caches
fi
fi & sleep 1; done
shell-script process livecd xubuntu
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
add a comment |
0
I can't understand why my script, sometimes, won't recognize if my Firefox is running. Analyzing the stdout I could state that this condition (if ps cax | grep firefox > /dev/null) sometimes is skipped even when my Firefox is running.
Currently using Xubuntu 18.10 Livecd
The script called at startup.
#!/bin/bash
[[ -f /home/xubuntu/controle_memoria.lock ]] && exit 1
> /home/xubuntu/controle_memoria.lock
while true ; do
free=`free -m | grep Mem | awk '{print $4}'`
if [ "$free" -gt 0 ]
then
if [ $free -le 120 ]; #When my memory consuptiom goes below 120MB do the commands below.
then
if ps cax | grep firefox > /dev/null
then
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
sudo sysctl -w vm.drop_caches=3
sudo sync && echo 3 | sudo tee /proc/sys/vm/drop_caches
fi
fi & sleep 1; done
shell-script process livecd xubuntu
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
add a comment |
0
0
0
I can't understand why my script, sometimes, won't recognize if my Firefox is running. Analyzing the stdout I could state that this condition (if ps cax | grep firefox > /dev/null) sometimes is skipped even when my Firefox is running.
Currently using Xubuntu 18.10 Livecd
The script called at startup.
#!/bin/bash
[[ -f /home/xubuntu/controle_memoria.lock ]] && exit 1
> /home/xubuntu/controle_memoria.lock
while true ; do
free=`free -m | grep Mem | awk '{print $4}'`
if [ "$free" -gt 0 ]
then
if [ $free -le 120 ]; #When my memory consuptiom goes below 120MB do the commands below.
then
if ps cax | grep firefox > /dev/null
then
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
sudo sysctl -w vm.drop_caches=3
sudo sync && echo 3 | sudo tee /proc/sys/vm/drop_caches
fi
fi & sleep 1; done
shell-script process livecd xubuntu
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
I can't understand why my script, sometimes, won't recognize if my Firefox is running. Analyzing the stdout I could state that this condition (if ps cax | grep firefox > /dev/null) sometimes is skipped even when my Firefox is running.
Currently using Xubuntu 18.10 Livecd
The script called at startup.
#!/bin/bash
[[ -f /home/xubuntu/controle_memoria.lock ]] && exit 1
> /home/xubuntu/controle_memoria.lock
while true ; do
free=`free -m | grep Mem | awk '{print $4}'`
if [ "$free" -gt 0 ]
then
if [ $free -le 120 ]; #When my memory consuptiom goes below 120MB do the commands below.
then
if ps cax | grep firefox > /dev/null
then
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
sudo sysctl -w vm.drop_caches=3
sudo sync && echo 3 | sudo tee /proc/sys/vm/drop_caches
fi
fi & sleep 1; done
shell-script process livecd xubuntu
shell-script process livecd xubuntu
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
edited Dec 18 '18 at 23:15
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
asked Dec 18 '18 at 19:25
Lucas Rizzini
267
267
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
1
- Ps has
-Coption without need to grep
killall -0 firefox-binwill tell you if firefox-bin process exist by exit code. Without need of pipe and redirection in a raw.- Just remove your
if psand leavekillall -9 firefox-bin && firefox-bin &> /dev/null &. So if process will not be killed, it wouldn't be started.
answered Dec 19 '18 at 1:25
Alexander
1,151213
add a comment |
0
What happens if you replace your if ps block with
for proc in /proc/*
do
if [[ $(readlink -f ${proc}/exe) = "/usr/bin/firefox-bin" ]]
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
done
This removes trying to parse ps output.
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
- Ps has
-Coption without need to grep
killall -0 firefox-binwill tell you if firefox-bin process exist by exit code. Without need of pipe and redirection in a raw.- Just remove your
if psand leavekillall -9 firefox-bin && firefox-bin &> /dev/null &. So if process will not be killed, it wouldn't be started.
answered Dec 19 '18 at 1:25
Alexander
1,151213
add a comment |
1
- Ps has
-Coption without need to grep
killall -0 firefox-binwill tell you if firefox-bin process exist by exit code. Without need of pipe and redirection in a raw.- Just remove your
if psand leavekillall -9 firefox-bin && firefox-bin &> /dev/null &. So if process will not be killed, it wouldn't be started.
answered Dec 19 '18 at 1:25
Alexander
1,151213
add a comment |
1
1
1
- Ps has
-Coption without need to grep
killall -0 firefox-binwill tell you if firefox-bin process exist by exit code. Without need of pipe and redirection in a raw.- Just remove your
if psand leavekillall -9 firefox-bin && firefox-bin &> /dev/null &. So if process will not be killed, it wouldn't be started.
answered Dec 19 '18 at 1:25
Alexander
1,151213
- Ps has
-Coption without need to grep
killall -0 firefox-binwill tell you if firefox-bin process exist by exit code. Without need of pipe and redirection in a raw.- Just remove your
if psand leavekillall -9 firefox-bin && firefox-bin &> /dev/null &. So if process will not be killed, it wouldn't be started.
answered Dec 19 '18 at 1:25
Alexander
1,151213
answered Dec 19 '18 at 1:25
Alexander
1,151213
answered Dec 19 '18 at 1:25
Alexander
1,151213
answered Dec 19 '18 at 1:25
Alexander
1,151213
1,151213
add a comment |
add a comment |
0
What happens if you replace your if ps block with
for proc in /proc/*
do
if [[ $(readlink -f ${proc}/exe) = "/usr/bin/firefox-bin" ]]
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
done
This removes trying to parse ps output.
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
add a comment |
0
What happens if you replace your if ps block with
for proc in /proc/*
do
if [[ $(readlink -f ${proc}/exe) = "/usr/bin/firefox-bin" ]]
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
done
This removes trying to parse ps output.
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
add a comment |
0
0
0
What happens if you replace your if ps block with
for proc in /proc/*
do
if [[ $(readlink -f ${proc}/exe) = "/usr/bin/firefox-bin" ]]
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
done
This removes trying to parse ps output.
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
What happens if you replace your if ps block with
for proc in /proc/*
do
if [[ $(readlink -f ${proc}/exe) = "/usr/bin/firefox-bin" ]]
sudo killall -9 firefox-bin
firefox &> /dev/null &
else
echo "Stopped"
fi
done
This removes trying to parse ps output.
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
answered Dec 18 '18 at 23:35
Doug O'Neal
2,8321817
2,8321817
add a comment |
add a comment |
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