Move temporary files related code out

[goredo.git] / tmp.go

diff --git a/tmp.go b/tmp.go
new file mode 100644 (file)
index 0000000..1db00f6
--- /dev/null
+++ b/tmp.go
@@ -0,0 +1,37 @@
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 3 of the License.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+// Temporary files
+
+package main
+
+import (
+       "os"
+       "path"
+       "strconv"
+       "time"
+)
+
+func tempsuffix() string {
+       return strconv.FormatInt((time.Now().UnixNano()+int64(os.Getpid()))&0xFFFFFFFF, 16)
+}
+
+func tempfile(dir, prefix string) (*os.File, error) {
+       // It respects umask, unlike ioutil.TempFile
+       name := path.Join(dir, TmpPrefix+prefix+"."+tempsuffix())
+       return os.OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, os.FileMode(0666))
+}