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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /toolkit/modules/subprocess/subprocess_unix.sys.mjs | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'toolkit/modules/subprocess/subprocess_unix.sys.mjs')
-rw-r--r-- | toolkit/modules/subprocess/subprocess_unix.sys.mjs | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/toolkit/modules/subprocess/subprocess_unix.sys.mjs b/toolkit/modules/subprocess/subprocess_unix.sys.mjs new file mode 100644 index 0000000000..59b5873af2 --- /dev/null +++ b/toolkit/modules/subprocess/subprocess_unix.sys.mjs @@ -0,0 +1,203 @@ +/* -*- 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/. */ + +import { + BaseProcess, + PromiseWorker, +} from "resource://gre/modules/subprocess/subprocess_common.sys.mjs"; + +import { ctypes } from "resource://gre/modules/ctypes.sys.mjs"; + +var obj = { ctypes }; +Services.scriptloader.loadSubScript( + "resource://gre/modules/subprocess/subprocess_shared.js", + obj +); +Services.scriptloader.loadSubScript( + "resource://gre/modules/subprocess/subprocess_shared_unix.js", + obj +); + +const { SubprocessConstants, LIBC } = obj; + +// libc is exported for tests. +export var libc = obj.libc; + +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_unix.worker.js"; + } + + static get WorkerClass() { + return UnixPromiseWorker; + } +} + +// Convert a null-terminated char pointer into a sized char array, and then +// convert that into a JS typed array. +// The resulting array will not be null-terminated. +function ptrToUint8Array(input) { + let { cast, uint8_t } = ctypes; + + let len = 0; + for ( + let ptr = cast(input, uint8_t.ptr); + ptr.contents; + ptr = ptr.increment() + ) { + len++; + } + + let aryPtr = cast(input, uint8_t.array(len).ptr); + return new Uint8Array(aryPtr.contents); +} + +var SubprocessUnix = { + Process, + + call(options) { + return Process.create(options); + }, + + *getEnvironment() { + let environ; + if (Services.appinfo.OS === "Darwin") { + environ = libc._NSGetEnviron().contents; + } else { + environ = libc.environ; + } + + const EQUAL = "=".charCodeAt(0); + let decoder = new TextDecoder("utf-8", { fatal: true }); + + function decode(array) { + try { + return decoder.decode(array); + } catch (e) { + return array; + } + } + + for ( + let envp = environ; + !envp.isNull() && !envp.contents.isNull(); + envp = envp.increment() + ) { + let buf = ptrToUint8Array(envp.contents); + + for (let i = 0; i < buf.length; i++) { + if (buf[i] == EQUAL) { + yield [decode(buf.subarray(0, i)), decode(buf.subarray(i + 1))]; + break; + } + } + } + }, + + isExecutableFile: async function isExecutable(path) { + if (!PathUtils.isAbsolute(path)) { + return false; + } + + try { + let info = await IOUtils.stat(path); + + // FIXME: We really want access(path, X_OK) here, but IOUtils does not + // support it. + return info.type !== "directory" && info.permissions & 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>} + */ + async pathSearch(bin, environment) { + if (PathUtils.isAbsolute(bin)) { + if (await 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 (typeof environment.PATH === "string") { + dirs = environment.PATH.split(":"); + } + + for (let dir of dirs) { + let path = PathUtils.join(dir, bin); + + if (await this.isExecutableFile(path)) { + return path; + } + } + let error = new Error(`Executable not found: ${bin}`); + error.errorCode = SubprocessConstants.ERROR_BAD_EXECUTABLE; + throw error; + }, +}; + +export var SubprocessImpl = SubprocessUnix; |