[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, 2 insertions, 2 deletions

diff --git a/pkg/sentry/sighandling/sighandling.go b/pkg/sentry/sighandling/sighandling.go
index 83195d5a1..bdaf8af29 100644
--- a/pkg/sentry/sighandling/sighandling.go
+++ b/pkg/sentry/sighandling/sighandling.go
@@ -19,8 +19,8 @@ import (
 	"os"
 	"os/signal"
 	"reflect"
-	"syscall"
 
+	"golang.org/x/sys/unix"
 	"gvisor.dev/gvisor/pkg/abi/linux"
 )
 
@@ -90,7 +90,7 @@ func StartSignalForwarding(handler func(linux.Signal)) func() {
 		if sig == int(linux.SIGURG) {
 			continue
 		}
-		signal.Notify(sigchan, syscall.Signal(sig))
+		signal.Notify(sigchan, unix.Signal(sig))
 	}
 	// Start up our listener.
 	go handleSignals(sigchans, handler, stop, done) // S/R-SAFE: synchronized by Kernel.extMu.