Table of Contents

• Child Process
  • childprocess.spawn(command, args, options)

Child Process#

It is possible to stream data through a child's stdin, stdout, and stderr in a fully non-blocking way.

childprocess.spawn(command, args, options)#

Spawns a command line process.

Since the data coming in is a stream, you may want to pass it through a filter like the luvit line emitter package to get lines instead.

function example()
  local LineEmitter = require('line-emitter').LineEmitter
  local childProcess = require('childprocess')
  local function run(command, args, options)
    local stdout, stderr = LineEmitter:new(), LineEmitter:new()
    local child = childProcess.spawn(command, args, options)
    child.stdout:pipe(stdout)
    child.stderr:pipe(stderr)
    return child, stdout, stderr
  end

  local child = run('ls', {'-hal'}, {})
  child:on('data', print)
end

example()

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drwxr-xr-x   31 root  wheel   1.1K Aug 21 16:39 .
drwxr-xr-x   31 root  wheel   1.1K Aug 21 16:39 ..