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https://github.com/tinygo-org/tinygo.git
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leongross
413 lines
8.6 KiB
Go
413 lines
8.6 KiB
Go
//go:build darwin || nintendoswitch || wasip1 || wasip2
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package syscall
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import (
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"unsafe"
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)
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type sliceHeader struct {
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buf *byte
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len uintptr
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cap uintptr
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}
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func Close(fd int) (err error) {
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if libc_close(int32(fd)) < 0 {
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err = getErrno()
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}
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return
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}
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func Dup(fd int) (fd2 int, err error) {
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fd2 = int(libc_dup(int32(fd)))
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if fd2 < 0 {
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err = getErrno()
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}
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return
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}
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func Write(fd int, p []byte) (n int, err error) {
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buf, count := splitSlice(p)
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n = libc_write(int32(fd), buf, uint(count))
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if n < 0 {
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err = getErrno()
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}
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return
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}
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func Read(fd int, p []byte) (n int, err error) {
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buf, count := splitSlice(p)
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n = libc_read(int32(fd), buf, uint(count))
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if n < 0 {
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err = getErrno()
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}
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return
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}
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func Pread(fd int, p []byte, offset int64) (n int, err error) {
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buf, count := splitSlice(p)
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n = libc_pread(int32(fd), buf, uint(count), offset)
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if n < 0 {
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err = getErrno()
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}
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return
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}
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func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
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buf, count := splitSlice(p)
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n = libc_pwrite(int32(fd), buf, uint(count), offset)
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if n < 0 {
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err = getErrno()
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}
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return
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}
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func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
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newoffset = libc_lseek(int32(fd), offset, whence)
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if newoffset < 0 {
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err = getErrno()
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}
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return
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}
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func Open(path string, flag int, mode uint32) (fd int, err error) {
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data := cstring(path)
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fd = int(libc_open(&data[0], int32(flag), mode))
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if fd < 0 {
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err = getErrno()
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}
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return
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}
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func Fsync(fd int) (err error) {
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if libc_fsync(int32(fd)) < 0 {
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err = getErrno()
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}
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return
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}
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func Readlink(path string, p []byte) (n int, err error) {
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data := cstring(path)
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buf, count := splitSlice(p)
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n = libc_readlink(&data[0], buf, uint(count))
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if n < 0 {
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err = getErrno()
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}
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return
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}
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func Chdir(path string) (err error) {
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data := cstring(path)
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fail := int(libc_chdir(&data[0]))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Mkdir(path string, mode uint32) (err error) {
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data := cstring(path)
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fail := int(libc_mkdir(&data[0], mode))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Rmdir(path string) (err error) {
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data := cstring(path)
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fail := int(libc_rmdir(&data[0]))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Rename(from, to string) (err error) {
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fromdata := cstring(from)
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todata := cstring(to)
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fail := int(libc_rename(&fromdata[0], &todata[0]))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Link(oldname, newname string) (err error) {
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fromdata := cstring(oldname)
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todata := cstring(newname)
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fail := int(libc_link(&fromdata[0], &todata[0]))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Symlink(from, to string) (err error) {
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fromdata := cstring(from)
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todata := cstring(to)
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fail := int(libc_symlink(&fromdata[0], &todata[0]))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Unlink(path string) (err error) {
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data := cstring(path)
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fail := int(libc_unlink(&data[0]))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Chown(path string, uid, gid int) (err error) {
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data := cstring(path)
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fail := int(libc_chown(&data[0], uid, gid))
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if fail < 0 {
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err = getErrno()
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}
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return
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}
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func Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
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func Kill(pid int, sig Signal) (err error) {
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return ENOSYS // TODO
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}
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type SysProcAttr struct{}
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// TODO
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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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func Getenv(key string) (value string, found bool) {
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data := cstring(key)
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raw := libc_getenv(&data[0])
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if raw == nil {
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return "", false
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}
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ptr := uintptr(unsafe.Pointer(raw))
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for size := uintptr(0); ; size++ {
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v := *(*byte)(unsafe.Pointer(ptr))
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if v == 0 {
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src := *(*[]byte)(unsafe.Pointer(&sliceHeader{buf: raw, len: size, cap: size}))
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return string(src), true
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}
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ptr += unsafe.Sizeof(byte(0))
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}
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}
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func Setenv(key, val string) (err error) {
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if len(key) == 0 {
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return EINVAL
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}
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for i := 0; i < len(key); i++ {
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if key[i] == '=' || key[i] == 0 {
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return EINVAL
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}
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}
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for i := 0; i < len(val); i++ {
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if val[i] == 0 {
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return EINVAL
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}
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}
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runtimeSetenv(key, val)
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return
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}
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func Unsetenv(key string) (err error) {
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runtimeUnsetenv(key)
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return
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}
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func Clearenv() {
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for _, s := range Environ() {
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for j := 0; j < len(s); j++ {
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if s[j] == '=' {
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Unsetenv(s[0:j])
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break
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}
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}
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}
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}
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func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
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addr := libc_mmap(nil, uintptr(length), int32(prot), int32(flags), int32(fd), uintptr(offset))
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if addr == unsafe.Pointer(^uintptr(0)) {
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return nil, getErrno()
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}
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return (*[1 << 30]byte)(addr)[:length:length], nil
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}
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func Munmap(b []byte) (err error) {
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errCode := libc_munmap(unsafe.Pointer(&b[0]), uintptr(len(b)))
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if errCode != 0 {
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err = getErrno()
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}
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return err
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}
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func Mprotect(b []byte, prot int) (err error) {
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errCode := libc_mprotect(unsafe.Pointer(&b[0]), uintptr(len(b)), int32(prot))
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if errCode != 0 {
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err = getErrno()
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}
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return
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}
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// BytePtrFromString returns a pointer to a NUL-terminated array of
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// bytes containing the text of s. If s contains a NUL byte at any
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// location, it returns (nil, EINVAL).
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func BytePtrFromString(s string) (*byte, error) {
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for i := 0; i < len(s); i++ {
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if s[i] == 0 {
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return nil, EINVAL
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}
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}
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return &cstring(s)[0], nil
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}
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// cstring converts a Go string to a C string.
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func cstring(s string) []byte {
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data := make([]byte, len(s)+1)
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copy(data, s)
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// final byte should be zero from the initial allocation
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return data
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}
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func splitSlice(p []byte) (buf *byte, len uintptr) {
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slice := (*sliceHeader)(unsafe.Pointer(&p))
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return slice.buf, slice.len
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}
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// These two functions are provided by the runtime.
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func runtimeSetenv(key, value string)
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func runtimeUnsetenv(key string)
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//export strlen
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func libc_strlen(ptr unsafe.Pointer) uintptr
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// ssize_t write(int fd, const void *buf, size_t count)
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//
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//export write
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func libc_write(fd int32, buf *byte, count uint) int
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// char *getenv(const char *name);
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//
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//export getenv
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func libc_getenv(name *byte) *byte
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// ssize_t read(int fd, void *buf, size_t count);
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//
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//export read
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func libc_read(fd int32, buf *byte, count uint) int
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// ssize_t pread(int fd, void *buf, size_t count, off_t offset);
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//
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//export pread
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func libc_pread(fd int32, buf *byte, count uint, offset int64) int
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// ssize_t pwrite(int fd, void *buf, size_t count, off_t offset);
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//
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//export pwrite
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func libc_pwrite(fd int32, buf *byte, count uint, offset int64) int
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// ssize_t lseek(int fd, off_t offset, int whence);
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//
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//export lseek
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func libc_lseek(fd int32, offset int64, whence int) int64
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// int close(int fd)
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//
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//export close
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func libc_close(fd int32) int32
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// int dup(int fd)
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//
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//export dup
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func libc_dup(fd int32) int32
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// void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset);
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//
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//export mmap
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func libc_mmap(addr unsafe.Pointer, length uintptr, prot, flags, fd int32, offset uintptr) unsafe.Pointer
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// int munmap(void *addr, size_t length);
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//
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//export munmap
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func libc_munmap(addr unsafe.Pointer, length uintptr) int32
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// int mprotect(void *addr, size_t len, int prot);
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//
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//export mprotect
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func libc_mprotect(addr unsafe.Pointer, len uintptr, prot int32) int32
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// int chdir(const char *pathname, mode_t mode);
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//
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//export chdir
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func libc_chdir(pathname *byte) int32
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// int chmod(const char *pathname, mode_t mode);
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//
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//export chmod
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func libc_chmod(pathname *byte, mode uint32) int32
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// int chown(const char *pathname, uid_t owner, gid_t group);
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//
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//export chown
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func libc_chown(pathname *byte, owner, group int) int32
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// int mkdir(const char *pathname, mode_t mode);
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//
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//export mkdir
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func libc_mkdir(pathname *byte, mode uint32) int32
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// int rmdir(const char *pathname);
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//
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//export rmdir
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func libc_rmdir(pathname *byte) int32
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// int rename(const char *from, *to);
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//
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//export rename
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func libc_rename(from, to *byte) int32
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// int symlink(const char *from, *to);
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//
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//export symlink
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func libc_symlink(from, to *byte) int32
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// int link(const char *oldname, *newname);
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//
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//export link
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func libc_link(oldname, newname *byte) int32
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// int fsync(int fd);
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//
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//export fsync
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func libc_fsync(fd int32) int32
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// ssize_t readlink(const char *path, void *buf, size_t count);
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//
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//export readlink
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func libc_readlink(path *byte, buf *byte, count uint) int
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// int unlink(const char *pathname);
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//
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//export unlink
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func libc_unlink(pathname *byte) int32
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