1 files changed, 166 insertions, 0 deletions
diff --git a/toolkit/modules/subprocess/subprocess_unix.jsm b/toolkit/modules/subprocess/subprocess_unix.jsm
new file mode 100644
index 000000000..47ce667d2
--- /dev/null
+++ b/toolkit/modules/subprocess/subprocess_unix.jsm
@@ -0,0 +1,166 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+/* 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;