diff options
Diffstat (limited to 'internal/config/atomicfile/atomicfile.go')
| -rw-r--r-- | internal/config/atomicfile/atomicfile.go | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/internal/config/atomicfile/atomicfile.go b/internal/config/atomicfile/atomicfile.go deleted file mode 100644 index 542f58a..0000000 --- a/internal/config/atomicfile/atomicfile.go +++ /dev/null @@ -1,51 +0,0 @@ -// Copyright (c) Tailscale Inc & AUTHORS -// SPDX-License-Identifier: BSD-3-Clause - -// Package atomicfile contains code related to writing to filesystems -// atomically. -// -// This package should be considered internal; its API is not stable. -package atomicfile // import "tailscale.com/atomicfile" - -import ( - "fmt" - "os" - "path/filepath" - "runtime" -) - -// WriteFile writes data to filename+some suffix, then renames it into filename. -// The perm argument is ignored on Windows. If the target filename already -// exists but is not a regular file, WriteFile returns an error. -func WriteFile(filename string, data []byte, perm os.FileMode) (err error) { - fi, err := os.Stat(filename) - if err == nil && !fi.Mode().IsRegular() { - return fmt.Errorf("%s already exists and is not a regular file", filename) - } - f, err := os.CreateTemp(filepath.Dir(filename), filepath.Base(filename)+".tmp") - if err != nil { - return err - } - tmpName := f.Name() - defer func() { - if err != nil { - f.Close() //nolint:errcheck - os.Remove(tmpName) //nolint:errcheck - } - }() - if _, err := f.Write(data); err != nil { - return err - } - if runtime.GOOS != "windows" { - if err := f.Chmod(perm); err != nil { - return err - } - } - if err := f.Sync(); err != nil { - return err - } - if err := f.Close(); err != nil { - return err - } - return os.Rename(tmpName, filename) -} |
