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// Copyright 2011 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 (

        "errors"

        "syscall"

)

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

type SyscallError struct {

        Syscall string

        Err     string

}

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

// 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.Error()}

}

var (

        Eshortstat = errors.New("stat buffer too small")

        Ebadstat   = errors.New("malformed stat buffer")

        Ebadfd     = errors.New("fd out of range or not open")

        Ebadarg    = errors.New("bad arg in system call")

        Enotdir    = errors.New("not a directory")

        Enonexist  = errors.New("file does not exist")

        Eexist     = errors.New("file already exists")

        Eio        = errors.New("i/o error")

        Eperm      = errors.New("permission denied")

        EINVAL  = Ebadarg

        ENOTDIR = Enotdir

        ENOENT  = Enonexist

        EEXIST  = Eexist

        EIO     = Eio

        EACCES  = Eperm

        EPERM   = Eperm

        EISDIR  = syscall.EISDIR

        EBADF        = errors.New("bad file descriptor")

        ENAMETOOLONG = errors.New("file name too long")

        ERANGE       = errors.New("math result not representable")

        EPIPE        = errors.New("Broken Pipe")

        EPLAN9       = errors.New("not supported by plan 9")

)