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os: document DevNull on windows

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DevNull is documented on darwin, dragonfly, freebsd, linux,
nacl, netbsd, openbsd, solaris and plan9, but not on windows.
Add missing documentation.

Change-Id: Icdbded0dd5e322ed4360cbce6bee4cdca5cfbe72
Reviewed-on: https://go-review.googlesource.com/102456
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Alex Brainman 2018-03-25 10:56:11 +11:00
parent 8da180f6ca
commit 782f9ce52f
1 changed files with 2 additions and 0 deletions
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2
src/os/file_windows.go
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@ -87,6 +87,8 @@ type dirInfo struct {
func epipecheck(file *File, e error) {
}
// DevNull is the name of the operating system's ``null device.''
// On Unix-like systems, it is "/dev/null"; on Windows, "NUL".
const DevNull = "NUL"
func (f *file) isdir() bool { return f != nil && f.dirinfo != nil }