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/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/* eslint-disable mozilla/balanced-listeners */
/* exported SubprocessImpl */
/* globals BaseProcess, PromiseWorker */
var {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
var EXPORTED_SYMBOLS = ["SubprocessImpl"];
Cu.import("resource://gre/modules/ctypes.jsm");
Cu.import("resource://gre/modules/osfile.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/Task.jsm");
Cu.import("resource://gre/modules/subprocess/subprocess_common.jsm");
Services.scriptloader.loadSubScript("resource://gre/modules/subprocess/subprocess_shared.js", this);
Services.scriptloader.loadSubScript("resource://gre/modules/subprocess/subprocess_shared_unix.js", this);
class UnixPromiseWorker extends PromiseWorker {
constructor(...args) {
super(...args);
let fds = ctypes.int.array(2)();
let res = libc.pipe(fds);
if (res == -1) {
throw new Error("Unable to create pipe");
}
this.signalFd = fds[1];
libc.fcntl(fds[0], LIBC.F_SETFL, LIBC.O_NONBLOCK);
libc.fcntl(fds[0], LIBC.F_SETFD, LIBC.FD_CLOEXEC);
libc.fcntl(fds[1], LIBC.F_SETFD, LIBC.FD_CLOEXEC);
this.call("init", [{signalFd: fds[0]}]);
}
closePipe() {
if (this.signalFd) {
libc.close(this.signalFd);
this.signalFd = null;
}
}
onClose() {
this.closePipe();
super.onClose();
}
signalWorker() {
libc.write(this.signalFd, new ArrayBuffer(1), 1);
}
postMessage(...args) {
this.signalWorker();
return super.postMessage(...args);
}
}
class Process extends BaseProcess {
static get WORKER_URL() {
return "resource://gre/modules/subprocess/subprocess_worker_unix.js";
}
static get WorkerClass() {
return UnixPromiseWorker;
}
}
var SubprocessUnix = {
Process,
call(options) {
return Process.create(options);
},
* getEnvironment() {
let environ;
if (OS.Constants.Sys.Name == "Darwin") {
environ = libc._NSGetEnviron().contents;
} else {
environ = libc.environ;
}
for (let envp = environ; !envp.contents.isNull(); envp = envp.increment()) {
let str = envp.contents.readString();
let idx = str.indexOf("=");
if (idx >= 0) {
yield [str.slice(0, idx),
str.slice(idx + 1)];
}
}
},
isExecutableFile: Task.async(function* isExecutable(path) {
if (!OS.Path.split(path).absolute) {
return false;
}
try {
let info = yield OS.File.stat(path);
// FIXME: We really want access(path, X_OK) here, but OS.File does not
// support it.
return !info.isDir && (info.unixMode & 0o111);
} catch (e) {
return false;
}
}),
/**
* Searches for the given executable file in the system executable
* file paths as specified by the PATH environment variable.
*
* On Windows, if the unadorned filename cannot be found, the
* extensions in the semicolon-separated list in the PATHEXT
* environment variable are successively appended to the original
* name and searched for in turn.
*
* @param {string} bin
* The name of the executable to find.
* @param {object} environment
* An object containing a key for each environment variable to be used
* in the search.
* @returns {Promise<string>}
*/
pathSearch: Task.async(function* (bin, environment) {
let split = OS.Path.split(bin);
if (split.absolute) {
if (yield this.isExecutableFile(bin)) {
return bin;
}
let error = new Error(`File at path "${bin}" does not exist, or is not executable`);
error.errorCode = SubprocessConstants.ERROR_BAD_EXECUTABLE;
throw error;
}
let dirs = [];
if (environment.PATH) {
dirs = environment.PATH.split(":");
}
for (let dir of dirs) {
let path = OS.Path.join(dir, bin);
if (yield this.isExecutableFile(path)) {
return path;
}
}
let error = new Error(`Executable not found: ${bin}`);
error.errorCode = SubprocessConstants.ERROR_BAD_EXECUTABLE;
throw error;
}),
};
var SubprocessImpl = SubprocessUnix;
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