Puppy Linux Discussion Forum :: View topic - Code that effectively does what inotify does!

Puppy Linux Discussion Forum
Puppy HOME page : puppylinux.com
"THE" alternative forum : puppylinux.info

FAQ

Memberlist

Usergroups

Profile

The time now is Wed 19 Feb 2020, 10:44
All times are UTC - 4

Forum index » Advanced Topics » Cutting edge

Code that effectively does what inotify does!
Moderators: Flash, Ian, JohnMurga

View previous topic :: View next topic

Page 1 of 1 [1 Post]

Author

Message

stemsee

Joined: 27 Jun 2013
Posts: 2572
Location: In The Way

Posted: Thu 24 May 2018, 06:51 Post subject:

Code that effectively does what inotify does!

How to watch a file, which needs to be read when having been written to, without using inotifywait, but similar outcome.

I was using this

Code:

killall -9 inotifywait
while inotifywait -e close_write /tmp/ap
do
bash -c passwordfn
done

then i changed to this

Code:

function aploop (){
while true
do
read line
if [[ "$line" ]]; then
bash -c passwordfn
unset line
sed -i '1d' /tmp/ap
bash -c aploop
exit
fi
sleep 1
done < /tmp/ap
}; export -f aploop

I am just wondering what other solutions are there??

EDIT: this works too

Code:

while true
do
watch -d -g ls -t -lR /tmp/ap && bash -c passwordfn
sleep 1
done

and this ...

Code:

tail -fn0 /tmp/ap | \
while read line ; do
echo "$line" | grep "+"
if [ $? = 0 ]
then
bash -c passwordfn
fi
done

Tis last one can be reduced to

Code:

tail -fn0 /tmp/ap | \
while read line ; do
[[ "$line" ]] && bash -c passwordfn &
done

but really I want to reduce it so that results from tail immediately trigger passwordfn without 'while read line' ... tht would be more effeicient.

Page 1 of 1 [1 Post]

View previous topic :: View next topic

Forum index » Advanced Topics » Cutting edge

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum

[ Time: 0.0264s ][ Queries: 11 (0.0037s) ][ GZIP on ]