mqttcli is an MQTT 3.1.1 Client which has almost same options with mosquitto_pub/sub. However, it has additional functionallity and a pubsub command which is suite for the shell script pipelining.

Download from here. Please choose your artitecture. (and chmod ugo+x if needed)

https://drone.io/github.com/shirou/mqttcli/files

Or if you have golang environment.

go get github.com/shirou/mqttcli

You can set host, port, username and password on the Environment.

export MQTT_HOST="localhost"
export MQTT_PORT="1883"
export MQTT_USERNAME="user"
export MQTT_PASSWORD="blahblah"

or using this config file. You can specifiy config file using --conf option, or place ~/.mqttcli.cfg.

{
  "host": "localhost",
  "port": "1883",
  "username": "user,
  "password": "blahblah"
}

mqttcli pub -t "some/where" -m "your message"

or

tail -f /var/log/nginx.log | mqttcli pub -t "some/where" -s

-s is diffrent from mosquitto_pub, it sends one line to one message.

mqttcli sub -t "some/#"

Note: This subcommand is just a concept work. Might be delete in the future.

Publish from stdin AND Subscribe from some topics and print stdout.

tail -f /vag/log/nginx.log | mqttcli pubsub --pub "some/a" --sub "some/#" > filterd.log

This is useful when other client manuplate something and send back to the topic.

paho.mqtt.golang.git

http://godoc.org/git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git

Eclipse Public License - v 1.0 (same as Paho's)