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// Copyright 2009 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.
package os
import syscall "syscall"
import os "os"
// FDs are wrappers for file descriptors
export type FD struct {
fd int64
}
export func NewFD(fd int64) *FD {
if fd < 0 {
return nil
}
return &FD{fd}
}
export var (
Stdin = NewFD(0);
Stdout = NewFD(1);
Stderr = NewFD(2);
)
export const (
O_RDONLY = syscall.O_RDONLY;
O_WRONLY = syscall.O_WRONLY;
O_RDWR = syscall.O_RDWR;
O_APPEND = syscall.O_APPEND;
O_ASYNC = syscall.O_ASYNC;
O_CREAT = syscall.O_CREAT;
O_NOCTTY = syscall.O_NOCTTY;
O_NONBLOCK = syscall.O_NONBLOCK;
O_NDELAY = O_NONBLOCK;
O_SYNC = syscall.O_SYNC;
O_TRUNC = syscall.O_TRUNC;
)
export func Open(name string, mode int, flags int) (fd *FD, err *Error) {
r, e := syscall.open(name, int64(mode), int64(flags));
return NewFD(r), ErrnoToError(e)
}
func (fd *FD) Close() *Error {
if fd == nil {
return EINVAL
}
r, e := syscall.close(fd.fd);
fd.fd = -1; // so it can't be closed again
return ErrnoToError(e)
}
func (fd *FD) Read(b *[]byte) (ret int, err *Error) {
if fd == nil {
return -1, EINVAL
}
var r, e int64;
if len(b) > 0 { // because we access b[0]
r, e = syscall.read(fd.fd, &b[0], int64(len(b)));
}
return int(r), ErrnoToError(e)
}
func (fd *FD) Write(b *[]byte) (ret int, err *Error) {
if fd == nil {
return -1, EINVAL
}
var r, e int64;
if len(b) > 0 { // because we access b[0]
r, e = syscall.write(fd.fd, &b[0], int64(len(b)));
}
return int(r), ErrnoToError(e)
}
func (fd *FD) WriteString(s string) (ret int, err *Error) {
if fd == nil {
return -1, EINVAL
}
b := new([]byte, len(s)+1);
if !syscall.StringToBytes(b, s) {
return -1, EINVAL
}
r, e := syscall.write(fd.fd, &b[0], int64(len(s)));
return int(r), ErrnoToError(e)
}
export func Pipe() (fd1 *FD, fd2 *FD, err *Error) {
var p [2]int64;
r, e := syscall.pipe(&p);
if e != 0 {
return nil, nil, ErrnoToError(e)
}
return NewFD(p[0]), NewFD(p[1]), nil
}
export func Mkdir(name string, perm int) *Error {
r, e := syscall.mkdir(name, int64(perm));
return ErrnoToError(e)
}
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