diff options
Diffstat (limited to 'src/pkg/io/ioutil/tempfile.go')
| -rw-r--r-- | src/pkg/io/ioutil/tempfile.go | 95 |
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 -} |
