49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
|
package syscallcompat
|
||
|
|
|
||
|
|
import (
|
||
|
|
"syscall"
|
||
|
|
)
|
||
|
|
|
||
|
|
// retryEINTR executes operation `op` and retries if it gets EINTR.
|
||
|
|
//
|
||
|
|
// Like ignoringEINTR() in the Go stdlib:
|
||
|
|
// https://github.com/golang/go/blob/d2a80f3fb5b44450e0b304ac5a718f99c053d82a/src/os/file_posix.go#L243
|
||
|
|
//
|
||
|
|
// This is needed because CIFS throws lots of EINTR errors:
|
||
|
|
// https://github.com/rfjakob/gocryptfs/issues/483
|
||
|
|
func retryEINTR(op func() error) error {
|
||
|
|
for {
|
||
|
|
err := op()
|
||
|
|
if err != syscall.EINTR {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// retryEINTR2 is like retryEINTR but for functions that return an (int, error)
|
||
|
|
// pair like syscall.Create().
|
||
|
|
func retryEINTR2(op func() (int, error)) (int, error) {
|
||
|
|
for {
|
||
|
|
ret, err := op()
|
||
|
|
if err != syscall.EINTR {
|
||
|
|
return ret, err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Open wraps syscall.Open.
|
||
|
|
// Retries on EINTR.
|
||
|
|
func Open(path string, mode int, perm uint32) (fd int, err error) {
|
||
|
|
fd, err = retryEINTR2(func() (int, error) {
|
||
|
|
return syscall.Open(path, mode, perm)
|
||
|
|
})
|
||
|
|
return fd, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Close wraps syscall.Close.
|
||
|
|
// Retries on EINTR.
|
||
|
|
func Close(fd int) (err error) {
|
||
|
|
err = retryEINTR(func() error { return syscall.Close(fd) })
|
||
|
|
return err
|
||
|
|
}
|