Function safeCreate

dgraph/cmd/cert/create.go:134–140

safeCreate only creates a file if it doesn't exist or we force overwrite.

(name string, overwrite bool, perm os.FileMode)

// safeCreate only creates a file if it doesn't exist or we force overwrite.
func safeCreate(name string, overwrite bool, perm os.FileMode) (*os.File, error) {
	flag := os.O_WRONLY | os.O_CREATE | os.O_TRUNC
	if !overwrite {
		flag |= os.O_EXCL
	}
	return os.OpenFile(name, flag, perm)
}

// createCAPair creates a CA certificate and key pair. The key file is created only
// if it doesn't already exist or we force it. The key path can differ from the certsDir