// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build js,wasm
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package syscall
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import (
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"sync"
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"unsafe"
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)
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const direntSize = 8 + 8 + 2 + 256
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type Dirent struct {
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Reclen uint16
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Name [256]byte
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}
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func direntIno(buf []byte) (uint64, bool) {
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return 1, true
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}
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func direntReclen(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
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}
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func direntNamlen(buf []byte) (uint64, bool) {
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reclen, ok := direntReclen(buf)
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if !ok {
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return 0, false
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}
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return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true
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}
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const PathMax = 256
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// An Errno is an unsigned number describing an error condition.
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// It implements the error interface. The zero Errno is by convention
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// a non-error, so code to convert from Errno to error should use:
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// err = nil
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// if errno != 0 {
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// err = errno
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// }
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type Errno uintptr
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func (e Errno) Error() string {
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if 0 <= int(e) && int(e) < len(errorstr) {
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s := errorstr[e]
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if s != "" {
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return s
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}
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}
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return "errno " + itoa(int(e))
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}
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func (e Errno) Temporary() bool {
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return e == EINTR || e == EMFILE || e.Timeout()
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}
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func (e Errno) Timeout() bool {
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return e == EAGAIN || e == EWOULDBLOCK || e == ETIMEDOUT
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}
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// A Signal is a number describing a process signal.
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// It implements the os.Signal interface.
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type Signal int
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const (
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_ Signal = iota
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SIGCHLD
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SIGINT
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SIGKILL
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SIGTRAP
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SIGQUIT
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SIGTERM
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)
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func (s Signal) Signal() {}
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func (s Signal) String() string {
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if 0 <= s && int(s) < len(signals) {
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str := signals[s]
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if str != "" {
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return str
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}
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}
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return "signal " + itoa(int(s))
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}
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var signals = [...]string{}
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// File system
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const (
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Stdin = 0
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Stdout = 1
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Stderr = 2
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)
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const (
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O_RDONLY = 0
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O_WRONLY = 1
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O_RDWR = 2
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O_CREAT = 0100
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O_CREATE = O_CREAT
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O_TRUNC = 01000
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O_APPEND = 02000
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O_EXCL = 0200
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O_SYNC = 010000
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O_CLOEXEC = 0
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)
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const (
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F_DUPFD = 0
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F_GETFD = 1
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F_SETFD = 2
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F_GETFL = 3
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F_SETFL = 4
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F_GETOWN = 5
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F_SETOWN = 6
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F_GETLK = 7
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F_SETLK = 8
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F_SETLKW = 9
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F_RGETLK = 10
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F_RSETLK = 11
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F_CNVT = 12
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F_RSETLKW = 13
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F_RDLCK = 1
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F_WRLCK = 2
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F_UNLCK = 3
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F_UNLKSYS = 4
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)
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const (
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S_IFMT = 0000370000
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S_IFSHM_SYSV = 0000300000
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S_IFSEMA = 0000270000
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S_IFCOND = 0000260000
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S_IFMUTEX = 0000250000
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S_IFSHM = 0000240000
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S_IFBOUNDSOCK = 0000230000
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S_IFSOCKADDR = 0000220000
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S_IFDSOCK = 0000210000
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S_IFSOCK = 0000140000
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S_IFLNK = 0000120000
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S_IFREG = 0000100000
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S_IFBLK = 0000060000
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S_IFDIR = 0000040000
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S_IFCHR = 0000020000
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S_IFIFO = 0000010000
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S_UNSUP = 0000370000
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S_ISUID = 0004000
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S_ISGID = 0002000
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S_ISVTX = 0001000
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S_IREAD = 0400
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S_IWRITE = 0200
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S_IEXEC = 0100
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S_IRWXU = 0700
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S_IRUSR = 0400
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S_IWUSR = 0200
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S_IXUSR = 0100
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S_IRWXG = 070
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S_IRGRP = 040
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S_IWGRP = 020
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S_IXGRP = 010
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S_IRWXO = 07
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S_IROTH = 04
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S_IWOTH = 02
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S_IXOTH = 01
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)
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type Stat_t struct {
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Dev int64
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Ino uint64
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Mode uint32
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Nlink uint32
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Uid uint32
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Gid uint32
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Rdev int64
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Size int64
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Blksize int32
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Blocks int32
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Atime int64
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AtimeNsec int64
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Mtime int64
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MtimeNsec int64
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Ctime int64
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CtimeNsec int64
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}
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// Processes
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// Not supported - just enough for package os.
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var ForkLock sync.RWMutex
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type WaitStatus uint32
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func (w WaitStatus) Exited() bool { return false }
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func (w WaitStatus) ExitStatus() int { return 0 }
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func (w WaitStatus) Signaled() bool { return false }
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func (w WaitStatus) Signal() Signal { return 0 }
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func (w WaitStatus) CoreDump() bool { return false }
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func (w WaitStatus) Stopped() bool { return false }
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func (w WaitStatus) Continued() bool { return false }
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func (w WaitStatus) StopSignal() Signal { return 0 }
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func (w WaitStatus) TrapCause() int { return 0 }
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// XXX made up
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type Rusage struct {
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Utime Timeval
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Stime Timeval
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}
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// XXX made up
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type ProcAttr struct {
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Dir string
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Env []string
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Files []uintptr
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Sys *SysProcAttr
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}
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type SysProcAttr struct {
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}
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func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
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return 0, 0, ENOSYS
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}
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func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
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return 0, 0, ENOSYS
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}
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func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
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return 0, 0, ENOSYS
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}
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func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
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return 0, 0, ENOSYS
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}
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func Sysctl(key string) (string, error) {
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if key == "kern.hostname" {
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return "js", nil
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}
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return "", ENOSYS
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}
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const ImplementsGetwd = true
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func Getwd() (wd string, err error) {
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var buf [PathMax]byte
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n, err := Getcwd(buf[0:])
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if err != nil {
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return "", err
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}
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return string(buf[:n]), nil
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}
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func Getegid() int { return 1 }
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func Geteuid() int { return 1 }
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func Getgid() int { return 1 }
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func Getgroups() ([]int, error) { return []int{1}, nil }
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func Getppid() int { return 2 }
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func Getpid() int { return 3 }
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func Gettimeofday(tv *Timeval) error { return ENOSYS }
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func Getuid() int { return 1 }
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func Kill(pid int, signum Signal) error { return ENOSYS }
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func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
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return 0, ENOSYS
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}
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func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle uintptr, err error) {
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return 0, 0, ENOSYS
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}
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func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
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return 0, ENOSYS
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}
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type Iovec struct{} // dummy
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type Timespec struct {
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Sec int64
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Nsec int64
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}
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type Timeval struct {
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Sec int64
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Usec int64
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}
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func setTimespec(sec, nsec int64) Timespec {
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return Timespec{Sec: sec, Nsec: nsec}
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}
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func setTimeval(sec, usec int64) Timeval {
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return Timeval{Sec: sec, Usec: usec}
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}
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