golang stat_unix 代码
文件路径：/src/cmd/go/internal/modload/stat_unix.go
/ Copyright 2019 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
/go:build unix
package modload
import (
"io/fs"
"os"
"syscall"
)
/ hasWritePerm reports whether the current user has permission to write to the
/ file with the given info.
/
/ Although the root user on most Unix systems can write to files even without
/ permission, hasWritePerm reports false if no appropriate permission bit is
/ set even if the current user is root.
func hasWritePerm(path string, fi fs.FileInfo) bool {
if os.Getuid() == 0 {
/ The root user can access any file, but we still want to default to
/ read-only mode if the go.mod file is marked as globally non-writable.
/ (If the user really intends not to be in readonly mode, they can
/ pass -mod=mod explicitly.)
return fi.Mode()&0222 != 0
}
const W_OK = 0x2
return syscall.Access(path, W_OK) == nil
}