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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
|
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build js && wasm
package syscall
import (
errorspkg "errors"
"internal/itoa"
"internal/oserror"
"sync"
"unsafe"
)
const direntSize = 8 + 8 + 2 + 256
type Dirent struct {
Reclen uint16
Name [256]byte
}
func direntIno(buf []byte) (uint64, bool) {
return 1, true
}
func direntReclen(buf []byte) (uint64, bool) {
return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
}
func direntNamlen(buf []byte) (uint64, bool) {
reclen, ok := direntReclen(buf)
if !ok {
return 0, false
}
return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true
}
const PathMax = 256
// An Errno is an unsigned number describing an error condition.
// It implements the error interface. The zero Errno is by convention
// a non-error, so code to convert from Errno to error should use:
//
// err = nil
// if errno != 0 {
// err = errno
// }
//
// Errno values can be tested against error values using errors.Is.
// For example:
//
// _, _, err := syscall.Syscall(...)
// if errors.Is(err, fs.ErrNotExist) ...
type Errno uintptr
func (e Errno) Error() string {
if 0 <= int(e) && int(e) < len(errorstr) {
s := errorstr[e]
if s != "" {
return s
}
}
return "errno " + itoa.Itoa(int(e))
}
func (e Errno) Is(target error) bool {
switch target {
case oserror.ErrPermission:
return e == EACCES || e == EPERM
case oserror.ErrExist:
return e == EEXIST || e == ENOTEMPTY
case oserror.ErrNotExist:
return e == ENOENT
case errorspkg.ErrUnsupported:
return e == ENOSYS || e == ENOTSUP || e == EOPNOTSUPP
}
return false
}
func (e Errno) Temporary() bool {
return e == EINTR || e == EMFILE || e.Timeout()
}
func (e Errno) Timeout() bool {
return e == EAGAIN || e == EWOULDBLOCK || e == ETIMEDOUT
}
// A Signal is a number describing a process signal.
// It implements the os.Signal interface.
type Signal int
const (
_ Signal = iota
SIGCHLD
SIGINT
SIGKILL
SIGTRAP
SIGQUIT
SIGTERM
)
func (s Signal) Signal() {}
func (s Signal) String() string {
if 0 <= s && int(s) < len(signals) {
str := signals[s]
if str != "" {
return str
}
}
return "signal " + itoa.Itoa(int(s))
}
var signals = [...]string{}
// File system
const (
Stdin = 0
Stdout = 1
Stderr = 2
)
const (
O_RDONLY = 0
O_WRONLY = 1
O_RDWR = 2
O_CREAT = 0100
O_CREATE = O_CREAT
O_TRUNC = 01000
O_APPEND = 02000
O_EXCL = 0200
O_SYNC = 010000
O_CLOEXEC = 0
)
const (
F_DUPFD = 0
F_GETFD = 1
F_SETFD = 2
F_GETFL = 3
F_SETFL = 4
F_GETOWN = 5
F_SETOWN = 6
F_GETLK = 7
F_SETLK = 8
F_SETLKW = 9
F_RGETLK = 10
F_RSETLK = 11
F_CNVT = 12
F_RSETLKW = 13
F_RDLCK = 1
F_WRLCK = 2
F_UNLCK = 3
F_UNLKSYS = 4
)
const (
S_IFMT = 0000370000
S_IFSHM_SYSV = 0000300000
S_IFSEMA = 0000270000
S_IFCOND = 0000260000
S_IFMUTEX = 0000250000
S_IFSHM = 0000240000
S_IFBOUNDSOCK = 0000230000
S_IFSOCKADDR = 0000220000
S_IFDSOCK = 0000210000
S_IFSOCK = 0000140000
S_IFLNK = 0000120000
S_IFREG = 0000100000
S_IFBLK = 0000060000
S_IFDIR = 0000040000
S_IFCHR = 0000020000
S_IFIFO = 0000010000
S_UNSUP = 0000370000
S_ISUID = 0004000
S_ISGID = 0002000
S_ISVTX = 0001000
S_IREAD = 0400
S_IWRITE = 0200
S_IEXEC = 0100
S_IRWXU = 0700
S_IRUSR = 0400
S_IWUSR = 0200
S_IXUSR = 0100
S_IRWXG = 070
S_IRGRP = 040
S_IWGRP = 020
S_IXGRP = 010
S_IRWXO = 07
S_IROTH = 04
S_IWOTH = 02
S_IXOTH = 01
)
type Stat_t struct {
Dev int64
Ino uint64
Mode uint32
Nlink uint32
Uid uint32
Gid uint32
Rdev int64
Size int64
Blksize int32
Blocks int32
Atime int64
AtimeNsec int64
Mtime int64
MtimeNsec int64
Ctime int64
CtimeNsec int64
}
// Processes
// Not supported - just enough for package os.
var ForkLock sync.RWMutex
type WaitStatus uint32
func (w WaitStatus) Exited() bool { return false }
func (w WaitStatus) ExitStatus() int { return 0 }
func (w WaitStatus) Signaled() bool { return false }
func (w WaitStatus) Signal() Signal { return 0 }
func (w WaitStatus) CoreDump() bool { return false }
func (w WaitStatus) Stopped() bool { return false }
func (w WaitStatus) Continued() bool { return false }
func (w WaitStatus) StopSignal() Signal { return 0 }
func (w WaitStatus) TrapCause() int { return 0 }
// XXX made up
type Rusage struct {
Utime Timeval
Stime Timeval
}
// XXX made up
type ProcAttr struct {
Dir string
Env []string
Files []uintptr
Sys *SysProcAttr
}
type SysProcAttr struct {
}
func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
return 0, 0, ENOSYS
}
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
return 0, 0, ENOSYS
}
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
return 0, 0, ENOSYS
}
func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
return 0, 0, ENOSYS
}
func Sysctl(key string) (string, error) {
if key == "kern.hostname" {
return "js", nil
}
return "", ENOSYS
}
const ImplementsGetwd = true
func Getwd() (wd string, err error) {
var buf [PathMax]byte
n, err := Getcwd(buf[0:])
if err != nil {
return "", err
}
return string(buf[:n]), nil
}
func Getuid() int {
return jsProcess.Call("getuid").Int()
}
func Getgid() int {
return jsProcess.Call("getgid").Int()
}
func Geteuid() int {
return jsProcess.Call("geteuid").Int()
}
func Getegid() int {
return jsProcess.Call("getegid").Int()
}
func Getgroups() (groups []int, err error) {
defer recoverErr(&err)
array := jsProcess.Call("getgroups")
groups = make([]int, array.Length())
for i := range groups {
groups[i] = array.Index(i).Int()
}
return groups, nil
}
func Getpid() int {
return jsProcess.Get("pid").Int()
}
func Getppid() int {
return jsProcess.Get("ppid").Int()
}
func Umask(mask int) (oldmask int) {
return jsProcess.Call("umask", mask).Int()
}
func Gettimeofday(tv *Timeval) error { return ENOSYS }
func Kill(pid int, signum Signal) error { return ENOSYS }
func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
return 0, ENOSYS
}
func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle uintptr, err error) {
return 0, 0, ENOSYS
}
func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
return 0, ENOSYS
}
type Iovec struct{} // dummy
type Timespec struct {
Sec int64
Nsec int64
}
type Timeval struct {
Sec int64
Usec int64
}
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: sec, Nsec: nsec}
}
func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: sec, Usec: usec}
}
|
