83 lines
1.5 KiB
Go
83 lines
1.5 KiB
Go
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//
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// Copyright 2014-2023 Cristian Maglie. 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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//
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//go:build linux || darwin || freebsd || openbsd
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package unixutils
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import (
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"fmt"
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"syscall"
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)
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// Pipe represents a unix-pipe
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type Pipe struct {
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opened bool
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rd int
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wr int
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}
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// Open creates a new pipe
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func (p *Pipe) Open() error {
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fds := []int{0, 0}
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if err := syscall.Pipe(fds); err != nil {
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return err
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}
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p.rd = fds[0]
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p.wr = fds[1]
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p.opened = true
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return nil
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}
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// ReadFD returns the file handle for the read side of the pipe.
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func (p *Pipe) ReadFD() int {
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if !p.opened {
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return -1
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}
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return p.rd
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}
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// WriteFD returns the flie handle for the write side of the pipe.
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func (p *Pipe) WriteFD() int {
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if !p.opened {
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return -1
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}
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return p.wr
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}
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// Write to the pipe the content of data. Returns the numbre of bytes written.
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func (p *Pipe) Write(data []byte) (int, error) {
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if !p.opened {
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return 0, fmt.Errorf("Pipe not opened")
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}
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return syscall.Write(p.wr, data)
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}
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// Read from the pipe into the data array. Returns the number of bytes read.
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func (p *Pipe) Read(data []byte) (int, error) {
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if !p.opened {
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return 0, fmt.Errorf("Pipe not opened")
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}
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return syscall.Read(p.rd, data)
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}
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// Close the pipe
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func (p *Pipe) Close() error {
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if !p.opened {
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return fmt.Errorf("Pipe not opened")
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}
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err1 := syscall.Close(p.rd)
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err2 := syscall.Close(p.wr)
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p.opened = false
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if err1 != nil {
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return err1
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}
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if err2 != nil {
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return err2
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}
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return nil
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}
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