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https://github.com/kopia/kopia.git
synced 2026-04-04 06:22:59 -04:00
29d4118aac
Minor robustness improvements - add safety check when converting file descriptor (`os.File.Fd()`) to `int` - check that file descriptor returned by Open (on Linux) is non-negative before converting to `uintptr`. This addresses a linter warning for a most-likely-non-existent-edge-case of converting a negative file descriptor. - check that parsed content IDs (hashes) do not exceed the maximum id hash length. - add nolint annotation for safe conversion
34 lines
758 B
Go
34 lines
758 B
Go
package tempfile
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import (
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"errors"
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"os"
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"syscall"
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"golang.org/x/sys/unix"
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)
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const permissions = 0o600
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// CreateAutoDelete creates a temporary file that will be automatically deleted on close.
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func CreateAutoDelete() (*os.File, error) {
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dir := os.TempDir()
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// on reasonably modern Linux (3.11 and above) O_TMPFILE is supported,
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// which creates invisible, unlinked file in a given directory.
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fd, err := unix.Open(dir, unix.O_RDWR|unix.O_TMPFILE|unix.O_CLOEXEC, permissions)
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if err == nil && fd >= 0 {
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return os.NewFile(uintptr(fd), ""), nil
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}
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if err == nil || errors.Is(err, syscall.EISDIR) || errors.Is(err, syscall.EOPNOTSUPP) {
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return createUnixFallback()
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}
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return nil, &os.PathError{
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Op: "open",
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Path: dir,
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Err: err,
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}
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}
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