How to execute an external program from within Node js

Question

Is it possible to execute an external program from within node js  Is there an equivalent to Python s os system   or any library that adds this functionality

User · Answer

From the Node js documentation      Node provides a tri-directional popen 3  facility through the ChildProcess class    See http   nodejs org docs v0 4 6 api child processes html

User · Answer

var exec   require  child process   exec  exec  pwd   function callback error  stdout  stderr          result

User · Answer

exec has memory limitation of buffer size of 512k  In this case it is better to use spawn  With spawn one has access to stdout of executed command at run time   var spawn   require  child process   spawn  var prc   spawn  java      -jar    -Xmx512M    -Dfile encoding utf8    script importlistings jar        noinspection JSUnresolvedFunction prc stdout setEncoding  utf8    prc stdout on  data   function  data        var str   data toString       var lines   str split    r  n  g       console log lines join            prc on  close   function  code        console log  process exit code     code

User · Answer

The simplest way is  const   exec     require  quot child process quot   exec  yourApp   unref    unref is necessary to end your process without waiting for  quot yourApp quot  Here are the exec docs

[node.js] How to execute an external program from within Node.js?

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