| // 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. |
| |
| // +build js,wasm |
| |
| package syscall |
| |
| import ( |
| "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 from the os package |
| // 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(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 |
| } |
| 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(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} |
| } |
