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os: clarify that OpenFile reqires one of O_RDONLY/O_WRONLY/O_RDWR

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Fixes #21322.

Change-Id: Ia589c576be0b5cdb7cde5d35cd857ad7c93c372b
Reviewed-on: https://go-review.googlesource.com/74550
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Ian Lance Taylor 2017-10-30 16:31:57 -07:00
parent c280126557
commit 94d9371780
1 changed files with 2 additions and 1 deletions
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3
src/os/file.go
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@ -60,7 +60,8 @@ var (
)
// Flags to OpenFile wrapping those of the underlying system. Not all
// flags may be implemented on a given system.
// flags may be implemented on a given system. Each call to OpenFile
// should specify exactly one of O_RDONLY, O_WRONLY, or O_RDWR.
const (
O_RDONLY int = syscall.O_RDONLY // open the file read-only.
O_WRONLY int = syscall.O_WRONLY // open the file write-only.