doc: clarify interaction of ioutil.WriteFile with umask

Note that ioutil.WriteFile's perm argument is the value before the
umask is applied.

Fixes #35835

Change-Id: I61cd9c88bced3be52b616d86e060cd3fd912ab1f
This commit is contained in:
Mostyn Bramley-Moore 2019-11-26 00:31:36 +01:00
parent 5de3b97554
commit 0069abb7c5
1 changed files with 2 additions and 2 deletions

View File

@ -74,8 +74,8 @@ func ReadFile(filename string) ([]byte, error) {
}
// WriteFile writes data to a file named by filename.
// If the file does not exist, WriteFile creates it with permissions perm;
// otherwise WriteFile truncates it before writing.
// If the file does not exist, WriteFile creates it with permissions perm
// (before umask); otherwise WriteFile truncates it before writing.
func WriteFile(filename string, data []byte, perm os.FileMode) error {
f, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
if err != nil {