1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
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_worker_unix.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;
|
