summaryrefslogtreecommitdiff
path: root/src/pkg/io/ioutil/tempfile.go
diff options
context:
space:
mode:
Diffstat (limited to 'src/pkg/io/ioutil/tempfile.go')
-rw-r--r--src/pkg/io/ioutil/tempfile.go95
1 files changed, 0 insertions, 95 deletions
diff --git a/src/pkg/io/ioutil/tempfile.go b/src/pkg/io/ioutil/tempfile.go
deleted file mode 100644
index 4a06e9756..000000000
--- a/src/pkg/io/ioutil/tempfile.go
+++ /dev/null
@@ -1,95 +0,0 @@
-// Copyright 2010 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.
-
-package ioutil
-
-import (
- "os"
- "path/filepath"
- "strconv"
- "sync"
- "time"
-)
-
-// Random number state.
-// We generate random temporary file names so that there's a good
-// chance the file doesn't exist yet - keeps the number of tries in
-// TempFile to a minimum.
-var rand uint32
-var randmu sync.Mutex
-
-func reseed() uint32 {
- return uint32(time.Now().UnixNano() + int64(os.Getpid()))
-}
-
-func nextSuffix() string {
- randmu.Lock()
- r := rand
- if r == 0 {
- r = reseed()
- }
- r = r*1664525 + 1013904223 // constants from Numerical Recipes
- rand = r
- randmu.Unlock()
- return strconv.Itoa(int(1e9 + r%1e9))[1:]
-}
-
-// TempFile creates a new temporary file in the directory dir
-// with a name beginning with prefix, opens the file for reading
-// and writing, and returns the resulting *os.File.
-// If dir is the empty string, TempFile uses the default directory
-// for temporary files (see os.TempDir).
-// Multiple programs calling TempFile simultaneously
-// will not choose the same file. The caller can use f.Name()
-// to find the pathname of the file. It is the caller's responsibility
-// to remove the file when no longer needed.
-func TempFile(dir, prefix string) (f *os.File, err error) {
- if dir == "" {
- dir = os.TempDir()
- }
-
- nconflict := 0
- for i := 0; i < 10000; i++ {
- name := filepath.Join(dir, prefix+nextSuffix())
- f, err = os.OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
- if os.IsExist(err) {
- if nconflict++; nconflict > 10 {
- rand = reseed()
- }
- continue
- }
- break
- }
- return
-}
-
-// TempDir creates a new temporary directory in the directory dir
-// with a name beginning with prefix and returns the path of the
-// new directory. If dir is the empty string, TempDir uses the
-// default directory for temporary files (see os.TempDir).
-// Multiple programs calling TempDir simultaneously
-// will not choose the same directory. It is the caller's responsibility
-// to remove the directory when no longer needed.
-func TempDir(dir, prefix string) (name string, err error) {
- if dir == "" {
- dir = os.TempDir()
- }
-
- nconflict := 0
- for i := 0; i < 10000; i++ {
- try := filepath.Join(dir, prefix+nextSuffix())
- err = os.Mkdir(try, 0700)
- if os.IsExist(err) {
- if nconflict++; nconflict > 10 {
- rand = reseed()
- }
- continue
- }
- if err == nil {
- name = try
- }
- break
- }
- return
-}