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47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
// 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 syscall
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import "internal/oserror"
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// An Errno is an unsigned number describing an error condition.
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// It implements the error interface. The zero Errno is by convention
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// a non-error, so code to convert from Errno to error should use:
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// err = nil
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// if errno != 0 {
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// err = errno
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// }
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//
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// Errno values can be tested against error values from the os package
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// using errors.Is. For example:
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//
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// _, _, err := syscall.Syscall(...)
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// if errors.Is(err, fs.ErrNotExist) ...
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type Errno uintptr
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func (e Errno) Error() string {
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return Errstr(int(e))
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}
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func (e Errno) Is(target error) bool {
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switch target {
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case oserror.ErrPermission:
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return e == EACCES || e == EPERM
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case oserror.ErrExist:
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return e == EEXIST || e == ENOTEMPTY
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case oserror.ErrNotExist:
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return e == ENOENT
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}
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return false
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}
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func (e Errno) Temporary() bool {
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return e == EINTR || e == EMFILE || e == ENFILE || e.Timeout()
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}
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func (e Errno) Timeout() bool {
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return e == EAGAIN || e == EWOULDBLOCK || e == ETIMEDOUT
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}
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