tmux script with quotes

Question

I'm using a tmux script in bash that has the following code:

tmux send-keys -t d4 'tmux send-keys -t "server1 tail -F /var/log/file.log | grep --line-buffered keyword | egrep --line-buffered "Two keywords" | /root/another_app" ENTER' ENTER

When the line is passed to tmux, "Two keywords" is transformed in Twokeywords.

I've tried to escape the quotes to no avail.

The same is happening to a more complex line, which is:

tmux send-keys -t d4 'tmux send-keys -t server2 "tail -F /var/log/file2.json | grep --line-buffered -a '"event_type":"keyword"' | /root/another_app" ENTER' ENTER

Also no luck in escaping the quotes.

My objective is to have the first line be sent to tmux as:

tail -F /var/log/file.log | grep --line-buffered keyword | egrep --line-buffered "Two keywords"

and the second line as

tail -F /var/log/file2.json | grep --line-buffered -a '"event_type":"keyword"'

Answer 1

please try this:

tmux send-keys -t d4 'tmux send-keys -t "server1 tail -F /var/log/file.log | grep --line-buffered keyword | egrep --line-buffered '"'Two keywords'"' | /root/another_app" ENTER' ENTER

because:

echo 'tmux send-keys -t "server1 tail -F /var/log/file.log | grep --line-buffered keyword | egrep --line-buffered '"'Two keywords'"' | /root/another_app" ENTER'
tmux send-keys -t "server1 tail -F /var/log/file.log | grep --line-buffered keyword | egrep --line-buffered 'Two keywords' | /root/another_app" ENTER

Are sure with two ENTER at the end?

For the second one you might use a here document to assign your special tmux parameter to a variable and then call your tmux with this variable:

var=$(cat <<SETVAR
'tmux send-keys -t server2 "tail -F /var/log/file2.json | grep --line-buffered -a '"event_type":"keyword"' | /root/another_app" ENTER'
SETVAR
)
echo "$var"
'tmux send-keys -t server2 "tail -F /var/log/file2.json | grep --line-buffered -a '"event_type":"keyword"' | /root/another_app" ENTER'

so try then

var=$(cat <<SETVAR
'tmux send-keys -t server2 "tail -F /var/log/file2.json | grep --line-buffered -a '"event_type":"keyword"' | /root/another_app" ENTER'
SETVAR
)
tmux send-keys -t d4 "$var" ENTER