Skip to content

Embed URL

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Watch current directory and execute a command if anything in it changes
#!/bin/bash
#
# Watch current directory (recursively) for file changes, and execute
# a command when a file or directory is created, modified or deleted.
#
# Written by: Senko Rasic <senko.rasic@dobarkod.hr>
#
# Requires Linux, bash and inotifywait (from inotify-tools package).
#
# To avoid executing the command multiple times when a sequence of
# events happen, the script waits one second after the change - if
# more changes happen, the timeout is extended by a second again.
#
# Installation:
# chmod a+rx onchange.sh
# sudo cp onchange.sh /usr/local/bin
#
# Example use - rsync local changes to the remote server:
#
# onchange.sh rsync -avt . host:/remote/dir
#
# Released to Public Domain. Use it as you like.
#
EVENTS="CREATE,CLOSE_WRITE,DELETE,MODIFY,MOVED_FROM,MOVED_TO"
if [ -z "$1" ]; then
echo "Usage: $0 cmd ..."
exit -1;
fi
inotifywait -e "$EVENTS" -m -r --format '%:e %f' . | (
WAITING="";
while true; do
LINE="";
read -t 1 LINE;
if test -z "$LINE"; then
if test ! -z "$WAITING"; then
echo "CHANGE";
WAITING="";
fi;
else
WAITING=1;
fi;
done) | (
while true; do
read TMP;
echo $@
$@
done
)
@evgenius

If you change "$@" to "eval $@" you will be able to run several commands.
Example:
onchange.sh "rsync dest orig && notify-send Sucess || notify-send Failure"

@hydranix

15 minutes

#!/bin/bash
if [ "$1"x = ""x ]; then
cat<<EOF
Watches for changes recursively, then goes on to execute your command
or script. It wait 2.5 minutes between executes. Good for syncing
directories or doing dynamic backups.
by Hydranix

Usage: DetectChanges "[ directory to watch ]" "[ command/script to execute ]" "[optional: time in second between executes]"
EOF
exit 0;
fi
while [ ! -f /tmp/EXITHNx ]; do
sleep 3
inotifywait -r -e create -e delete -e move "${1}" &>/dev/null
XSTA=$?
if [ "$XSTA" = "0" ]; then
eval ${2}
else
touch /tmp/EXITHNx
exit 1
fi
[[ -z ${3} ]] && sleep 150 || sleep ${3}
done
rm -f /tmp/EXITHNx

@ArminVieweg

Unfortunately inotifywait does not work with mounted folders. I wanted to use it in my vagrant box, to copy files from eg. /vagrant/www/ to /var/www/ (which is the document root of apache). Mounting files directly to document root slows down php very much, so I thought this would be a nice idea.

@phazei

@ArminVieweg Did you eventually find a solution for that? It's precisely what I was looking to do.

@vn971

The version with eval published by @evgenius https://gist.github.com/evgenius/6019316

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Something went wrong with that request. Please try again.