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//go:build linux
// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
package utils
import (
"fmt"
"io/fs"
"os"
"strconv"
"golang.org/x/sys/unix"
)
var _ = fmt.Print
func CreateAnonymousTemp(dir string, perms ...fs.FileMode) (*os.File, error) {
if dir == "" {
dir = os.TempDir()
}
var perm fs.FileMode = unix.S_IREAD | unix.S_IWRITE
if len(perms) > 0 {
perm = perms[0]
}
fd, err := unix.Open(dir, unix.O_RDWR|unix.O_TMPFILE|unix.O_CLOEXEC, uint32(perm&fs.ModePerm))
if err == nil {
path := "/proc/self/fd/" + strconv.FormatUint(uint64(fd), 10)
return os.NewFile(uintptr(fd), path), nil
}
if err == unix.ENOENT {
return nil, &os.PathError{
Op: "open",
Path: dir,
Err: err,
}
}
f, err := os.CreateTemp(dir, "")
if err != nil {
return nil, err
}
err = os.Remove(f.Name())
if err != nil {
f.Close()
return nil, err
}
return f, err
}
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