50 lines
937 B
Go
50 lines
937 B
Go
|
package fuse
|
||
|
|
|
||
|
|
import (
|
||
|
|
"path/filepath"
|
||
|
|
"syscall"
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
type pollFd struct {
|
||
|
|
Fd int32
|
||
|
|
Events int16
|
||
|
|
Revents int16
|
||
|
|
}
|
||
|
|
|
||
|
|
func sysPoll(fds []pollFd, timeout int) (n int, err error) {
|
||
|
|
r0, _, e1 := syscall.Syscall(syscall.SYS_POLL, uintptr(unsafe.Pointer(&fds[0])),
|
||
|
|
uintptr(len(fds)), uintptr(timeout))
|
||
|
|
n = int(r0)
|
||
|
|
if e1 != 0 {
|
||
|
|
err = syscall.Errno(e1)
|
||
|
|
}
|
||
|
|
return n, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func pollHack(mountPoint string) error {
|
||
|
|
const (
|
||
|
|
POLLIN = 0x1
|
||
|
|
POLLPRI = 0x2
|
||
|
|
POLLOUT = 0x4
|
||
|
|
POLLRDHUP = 0x2000
|
||
|
|
POLLERR = 0x8
|
||
|
|
POLLHUP = 0x10
|
||
|
|
)
|
||
|
|
|
||
|
|
fd, err := syscall.Open(filepath.Join(mountPoint, pollHackName), syscall.O_CREAT|syscall.O_TRUNC|syscall.O_RDWR, 0644)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
pollData := []pollFd{{
|
||
|
|
Fd: int32(fd),
|
||
|
|
Events: POLLIN | POLLPRI | POLLOUT,
|
||
|
|
}}
|
||
|
|
|
||
|
|
// Trigger _OP_POLL, so we can say ENOSYS. We don't care about
|
||
|
|
// the return value.
|
||
|
|
sysPoll(pollData, 0)
|
||
|
|
syscall.Close(fd)
|
||
|
|
return nil
|
||
|
|
}
|