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os: add precondition doc for Create and OpenFile

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Fixes #69836

Change-Id: Ide243c2aa9c6f9d45976f728f97e32c4fbadb720
Reviewed-on: https://go-review.googlesource.com/c/go/+/619316
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This commit is contained in:
xieyuschen 2024-10-11 12:45:11 +08:00 committed by Gopher Robot
parent a9ad0ff6ba
commit cd4820cd19
1 changed files with 3 additions and 1 deletions
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4
src/os/file.go
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@ -374,6 +374,7 @@ func Open(name string) (*File, error) {
// it is truncated. If the file does not exist, it is created with mode 0o666
// (before umask). If successful, methods on the returned File can
// be used for I/O; the associated file descriptor has mode O_RDWR.
// The directory containing the file must already exist.
// If there is an error, it will be of type *PathError.
func Create(name string) (*File, error) {
return OpenFile(name, O_RDWR|O_CREATE|O_TRUNC, 0666)
@ -382,7 +383,8 @@ func Create(name string) (*File, error) {
// OpenFile is the generalized open call; most users will use Open
// or Create instead. It opens the named file with specified flag
// (O_RDONLY etc.). If the file does not exist, and the O_CREATE flag
// is passed, it is created with mode perm (before umask). If successful,
// is passed, it is created with mode perm (before umask);
// the containing directory must exist. If successful,
// methods on the returned File can be used for I/O.
// If there is an error, it will be of type *PathError.
func OpenFile(name string, flag int, perm FileMode) (*File, error) {