mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-10 22:13:39 +00:00
Dan Kegel
58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
// +build darwin linux,!baremetal
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// Portions copyright 2009 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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package os
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import (
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"io"
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"syscall"
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)
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type syscallFd = int
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// fixLongPath is a noop on non-Windows platforms.
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func fixLongPath(path string) string {
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return path
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}
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func Pipe() (r *File, w *File, err error) {
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var p [2]int
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err = handleSyscallError(syscall.Pipe2(p[:], syscall.O_CLOEXEC))
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if err != nil {
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return
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}
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r = &File{
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handle: unixFileHandle(p[0]),
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name: "|0",
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}
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w = &File{
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handle: unixFileHandle(p[1]),
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name: "|1",
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}
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return
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}
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func tempDir() string {
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dir := Getenv("TMPDIR")
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if dir == "" {
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dir = "/tmp"
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}
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return dir
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}
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// ReadAt reads up to len(b) bytes from the File starting at the given absolute offset.
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// It returns the number of bytes read and any error encountered, possibly io.EOF.
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// At end of file, Pread returns 0, io.EOF.
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// TODO: move to file_anyos once ReadAt is implemented for windows
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func (f unixFileHandle) ReadAt(b []byte, offset int64) (n int, err error) {
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n, err = syscall.Pread(syscallFd(f), b, offset)
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err = handleSyscallError(err)
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if n == 0 && err == nil {
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err = io.EOF
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}
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return
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}
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