[op] Replace syscall package usage with golang.org/x/sys/unix in pkg/.

The syscall package has been deprecated in favor of golang.org/x/sys.

Note that syscall is still used in the following places:
- pkg/sentry/socket/hostinet/stack.go: some netlink related functionalities
  are not yet available in golang.org/x/sys.
- syscall.Stat_t is still used in some places because os.FileInfo.Sys() still
  returns it and not unix.Stat_t.

Updates #214

PiperOrigin-RevId: 360701387

1 files changed, 6 insertions, 6 deletions

diff --git a/pkg/fdnotifier/poll_unsafe.go b/pkg/fdnotifier/poll_unsafe.go
index ec2f997a2..493ea8375 100644
--- a/pkg/fdnotifier/poll_unsafe.go
+++ b/pkg/fdnotifier/poll_unsafe.go
@@ -17,9 +17,9 @@
 package fdnotifier
 
 import (
-	"syscall"
 	"unsafe"
 
+	"golang.org/x/sys/unix"
 	"gvisor.dev/gvisor/pkg/waiter"
 )
 
@@ -35,16 +35,16 @@ func NonBlockingPoll(fd int32, mask waiter.EventMask) waiter.EventMask {
 		events: int16(mask.ToLinux()),
 	}
 
-	ts := syscall.Timespec{
+	ts := unix.Timespec{
 		Sec:  0,
 		Nsec: 0,
 	}
 
 	for {
-		n, _, err := syscall.RawSyscall6(syscall.SYS_PPOLL, uintptr(unsafe.Pointer(&e)), 1,
+		n, _, err := unix.RawSyscall6(unix.SYS_PPOLL, uintptr(unsafe.Pointer(&e)), 1,
 			uintptr(unsafe.Pointer(&ts)), 0, 0, 0)
 		// Interrupted by signal, try again.
-		if err == syscall.EINTR {
+		if err == unix.EINTR {
 			continue
 		}
 		// If an error occur we'll conservatively say the FD is ready for
@@ -66,14 +66,14 @@ func NonBlockingPoll(fd int32, mask waiter.EventMask) waiter.EventMask {
 // epollWait performs a blocking wait on epfd.
 //
 // Preconditions: len(events) > 0
-func epollWait(epfd int, events []syscall.EpollEvent, msec int) (int, error) {
+func epollWait(epfd int, events []unix.EpollEvent, msec int) (int, error) {
 	if len(events) == 0 {
 		panic("Empty events passed to EpollWait")
 	}
 
 	// We actually use epoll_pwait with NULL sigmask instead of epoll_wait
 	// since that is what the Go >= 1.11 runtime prefers.
-	r, _, e := syscall.Syscall6(syscall.SYS_EPOLL_PWAIT, uintptr(epfd), uintptr(unsafe.Pointer(&events[0])), uintptr(len(events)), uintptr(msec), 0, 0)
+	r, _, e := unix.Syscall6(unix.SYS_EPOLL_PWAIT, uintptr(epfd), uintptr(unsafe.Pointer(&events[0])), uintptr(len(events)), uintptr(msec), 0, 0)
 	if e != 0 {
 		return 0, e
 	}