feat(general): always try O_TMPFILE on Linux when creating temporary files
import (
"errors"
"os"
- "sync/atomic"
"syscall"
"golang.org/x/sys/unix"
)
-var unsupportedTmpFile = new(int32) //nolint:gochecknoglobals
-
// Create creates a temporary file that will be automatically deleted on close.
func Create(dir string) (*os.File, error) {
- if atomic.LoadInt32(unsupportedTmpFile) == 1 {
- // already tried O_TMPFILE, was unsupported, fall back to generic
- // Unix method.
- return createUnixFallback(dir)
- }
-
// on reasonably modern Linux (3.11 and above) O_TMPFILE is supported,
// which creates invisible, unlinked file in a given directory.
-
fd, err := unix.Open(dir, unix.O_RDWR|unix.O_TMPFILE|unix.O_CLOEXEC, permissions)
if err == nil {
return os.NewFile(uintptr(fd), ""), nil
}
if errors.Is(err, syscall.EISDIR) || errors.Is(err, syscall.EOPNOTSUPP) {
- // O_TMPFILE is unsupported, fall back and prevent future attempts.
- atomic.StoreInt32(unsupportedTmpFile, 1)
-
return createUnixFallback(dir)
}
