libpod removal from main (phase 2)

this is phase 2 for the removal of libpod from main.

Signed-off-by: baude <bbaude@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/pkg/util/utils.go b/pkg/util/utils.go
index 61cdbbf38..9e49f08a0 100644
--- a/pkg/util/utils.go
+++ b/pkg/util/utils.go
@@ -337,3 +337,14 @@ func GetGlobalOpts(c *cliconfig.RunlabelValues) string {
 	})
 	return strings.Join(optsCommand, " ")
 }
+
+// OpenExclusiveFile opens a file for writing and ensure it doesn't already exist
+func OpenExclusiveFile(path string) (*os.File, error) {
+	baseDir := filepath.Dir(path)
+	if baseDir != "" {
+		if _, err := os.Stat(baseDir); err != nil {
+			return nil, err
+		}
+	}
+	return os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0666)
+}