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Add property to pass additional file descriptors to daemon #15

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Add property to pass additional file descriptors to daemon #15

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,7 @@ Creates new `Daemon` instance. Supported `options`:
* `args` - additional node runtime arguments, ie `--debug`; `array` or `string`
* `argv` - argv for daemon (default: `process.argv.slice(2)`); `array` or `string`
* `cwd` - current working directory for spawned daemon (default: `/`); `string`
* `fds` - array of additional file descriptors to pass to the daemon. Note that the actual descriptors passed to the daemon are `[ 'ignore', 'ignore', 'ignore', 'ipc' ].concat(fds)`, so the supplied descriptors will be available in the daemon as starting from fd 4. For more information look at [Node docs](https://nodejs.org/api/child_process.html#child_process_options_stdio).

All paths are resolved relative to file that uses "daemonize".

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6 changes: 5 additions & 1 deletion lib/daemonize.js
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Expand Up @@ -62,6 +62,10 @@ var Daemon = function(options) {
this._options.user = options.user || "";
this._options.group = options.group || "";

this._options.fds = options.fds || [];
if (!Array.isArray(this._options.fds))
this._options.fds = [ this._options.fds ];

if (typeof options.umask == "undefined")
this._options.umask = 0;
else if (typeof options.umask == "string")
Expand Down Expand Up @@ -121,7 +125,7 @@ Daemon.prototype.start = function(listener) {
__dirname + "/wrapper.js"
]).concat(this._options.argv), {
env: process.env,
stdio: ["ignore", "ignore", "ignore", "ipc"],
stdio: ["ignore", "ignore", "ignore", "ipc"].concat(this._options.fds),
detached: true
}
);
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