lsof

List open file descriptors for your node process

lsof For Node

A simple lsof processor for node. This is handy when debugging long apps. You can load this and call it from your status commands to see how many open file descriptors your process has.

npm install lsof

var lsof = require('../lib/lsof');

lsof.counters(function(data) {
    console.log(data);
    /*
    *
    * { pid: 24231
    *   , user: 'davglass'
    *   , open: 12
    *   , types: { dir: 1, reg: 3, chr: 3, pipe: 5 }
    *   }
    *
    */
});


lsof.raw(function(data) {
    console.log(data);
    /**
    * [ { command: 'node'
    *   , pid: '24231'
    *   , user: 'davglass'
    *   , fd: 'txt'
    *   , type: 'REG'
    *   , device: '14,1'
    *   , 'size/off': '5139784'
    *   , node: '15331212'
    *   , name: '/usr/local/bin/node'
    *   }
    * , { command: 'node'
    *   , pid: '24231'
    *   , user: 'davglass'
    *   , fd: 'txt'
    *   , type: 'REG'
    *   , device: '14,1'
    *   , 'size/off': '1054960'
    *   , node: '7477054'
    *   , name: '/usr/lib/dyld'
    *   }
    * , { command: 'node'
    *   , pid: '24231'
    *   , user: 'davglass'
    *   , fd: 'txt'
    *   , type: 'REG'
    *   , device: '14,1'
    *   , 'size/off': '205565952'
    *   , node: '15630602'
    *   , name: '/private/var/db/dyld/dyld_shared_cache_x86_64'
    *   }
    * , { command: 'node'
    *   , pid: '24231'
    *   , user: 'davglass'
    *   , fd: '0u'
    *   , type: 'CHR'
    *   , device: '16,2'
    *   , 'size/off': '0t183952'
    *   , node: '1355'
    *   , name: '/dev/ttys002'
    *   }
    * ]
    */
});

// Or, inspect a port in use
lsof.rawTcpPort(11211, function(data) {
    console.log(data);
    /*
     * [ { state: 'listen',
     *     command: 'memcached',
     *     pid: '183',
     *     user: 'matt',
     *     fd: '28u',
     *     type: 'IPv6',
     *     device: '0xffffff80121a3600',
     *     'size/off': '0t0',
     *     node: 'TCP',
     *     name: 'localhost:11211' },
     *   { state: 'listen',
     *     command: 'memcached',
     *     pid: '183',
     *     user: 'matt',
     *     fd: '29u',
     *     type: 'IPv4',
     *     device: '0xffffff8013f90500',
     *     'size/off': '0t0',
     *     node: 'TCP',
     *    name: 'localhost:11211' } ]
     *
     */
}