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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.

// +build darwin freebsd linux netbsd openbsd windows

package os

import syscall "syscall"

// Commonly known Unix errors.

var (

        EPERM        error = syscall.EPERM

        ENOENT       error = syscall.ENOENT

        ESRCH        error = syscall.ESRCH

        EINTR        error = syscall.EINTR

        EIO          error = syscall.EIO

        ENXIO        error = syscall.ENXIO

        E2BIG        error = syscall.E2BIG

        ENOEXEC      error = syscall.ENOEXEC

        EBADF        error = syscall.EBADF

        ECHILD       error = syscall.ECHILD

        EDEADLK      error = syscall.EDEADLK

        ENOMEM       error = syscall.ENOMEM

        EACCES       error = syscall.EACCES

        EFAULT       error = syscall.EFAULT

        EBUSY        error = syscall.EBUSY

        EEXIST       error = syscall.EEXIST

        EXDEV        error = syscall.EXDEV

        ENODEV       error = syscall.ENODEV

        ENOTDIR      error = syscall.ENOTDIR

        EISDIR       error = syscall.EISDIR

        EINVAL       error = syscall.EINVAL

        ENFILE       error = syscall.ENFILE

        EMFILE       error = syscall.EMFILE

        ENOTTY       error = syscall.ENOTTY

        EFBIG        error = syscall.EFBIG

        ENOSPC       error = syscall.ENOSPC

        ESPIPE       error = syscall.ESPIPE

        EROFS        error = syscall.EROFS

        EMLINK       error = syscall.EMLINK

        EPIPE        error = syscall.EPIPE

        EAGAIN       error = syscall.EAGAIN

        EDOM         error = syscall.EDOM

        ERANGE       error = syscall.ERANGE

        EADDRINUSE   error = syscall.EADDRINUSE

        ECONNREFUSED error = syscall.ECONNREFUSED

        ENAMETOOLONG error = syscall.ENAMETOOLONG

        EAFNOSUPPORT error = syscall.EAFNOSUPPORT

        ETIMEDOUT    error = syscall.ETIMEDOUT

        ENOTCONN     error = syscall.ENOTCONN

)

// SyscallError records an error from a specific system call.

type SyscallError struct {

        Syscall string

        Errno   error

}

func (e *SyscallError) Error() string { return e.Syscall + ": " + e.Errno.Error() }

// NewSyscallError returns, as an error, a new SyscallError

// with the given system call name and error details.

// As a convenience, if err is nil, NewSyscallError returns nil.

func NewSyscallError(syscall string, err error) error {

        if err == nil {

                return nil

        }

        return &SyscallError{syscall, err}

}