from_stdin

Reads and parses events from standard input.

from_stdin { … }

Description

The from_stdin operator reads bytes from standard input and passes them through the provided parsing pipeline to produce events. This is useful when piping data into the tenzir executable as part of a shell script or command chain.

`{ … }`

The pipeline to parse the incoming bytes into events. The pipeline receives raw bytes and must produce events. For example, { read_json } parses the input as JSON.

Examples

Parse JSON from standard input

echo '{"foo": 42}' | tenzir

from_stdin {
  read_json
}

{
  foo: 42,
}

Parse CSV data piped from another command

cat data.csv | tenzir -f pipeline.tql

from_stdin {
  read_csv
}

Parse Syslog messages

tail -f /var/log/syslog | tenzir -f pipeline.tql

from_stdin {
  read_syslog
}