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60 lines
1.9 KiB
JavaScript
60 lines
1.9 KiB
JavaScript
/*
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* decaffeinate suggestions:
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* DS101: Remove unnecessary use of Array.from
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* DS102: Remove unnecessary code created because of implicit returns
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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const _ = require("underscore");
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const logger = require("logger-sharelatex");
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const child_process = require('child_process');
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const Settings = require("settings-sharelatex");
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// execute a command in the same way as 'exec' but with a timeout that
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// kills all child processes
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//
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// we spawn the command with 'detached:true' to make a new process
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// group, then we can kill everything in that process group.
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module.exports = function(command, options, callback) {
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if (callback == null) { callback = function(err, stdout, stderr) {}; }
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if (!Settings.enableConversions) {
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const error = new Error("Image conversions are disabled");
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return callback(error);
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}
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// options are {timeout: number-of-milliseconds, killSignal: signal-name}
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const [cmd, ...args] = Array.from(command);
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const child = child_process.spawn(cmd, args, {detached:true});
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let stdout = "";
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let stderr = "";
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const cleanup = _.once(function(err) {
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if (killTimer != null) { clearTimeout(killTimer); }
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return callback(err, stdout, stderr);
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});
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if (options.timeout != null) {
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var killTimer = setTimeout(function() {
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try {
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// use negative process id to kill process group
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return process.kill(-child.pid, options.killSignal || "SIGTERM");
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} catch (error) {
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return logger.log({process: child.pid, kill_error: error}, "error killing process");
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}
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}
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, options.timeout);
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}
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child.on('close', function(code, signal) {
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const err = code ? new Error(`exit status ${code}`) : signal;
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return cleanup(err);
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});
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child.on('error', err => cleanup(err));
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child.stdout.on('data', chunk => stdout += chunk);
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return child.stderr.on('data', chunk => stderr += chunk);
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};
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