Fix close fds of exec --preserve-fds
Fix the closing of fds from --preserve-fds to avoid the operation on unrelated fds.
@@ -449,9 +449,12 @@ func (r *ConmonOCIRuntime) startExec(c *Container, sessionID string, options *Ex
return nil, nil, err
}
+ var filesToClose []*os.File
if options.PreserveFDs > 0 {
for fd := 3; fd < int(3+options.PreserveFDs); fd++ {
- execCmd.ExtraFiles = append(execCmd.ExtraFiles, os.NewFile(uintptr(fd), fmt.Sprintf("fd-%d", fd)))
+ f := os.NewFile(uintptr(fd), fmt.Sprintf("fd-%d", fd))
+ filesToClose = append(filesToClose, f)
+ execCmd.ExtraFiles = append(execCmd.ExtraFiles, f)
}
}
@@ -483,14 +486,10 @@ func (r *ConmonOCIRuntime) startExec(c *Container, sessionID string, options *Ex
return nil, nil, err
}
- if options.PreserveFDs > 0 {
- for fd := 3; fd < int(3+options.PreserveFDs); fd++ {
// These fds were passed down to the runtime. Close them
// and not interfere
- if err := os.NewFile(uintptr(fd), fmt.Sprintf("fd-%d", fd)).Close(); err != nil {
- logrus.Debugf("unable to close file fd-%d", fd)
- }
- }
+ for _, f := range filesToClose {
+ errorhandling.CloseQuiet(f)
}
return execCmd, pipes, nil
