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

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

Note that syscall is still used in some places because the following don't seem
to have an equivalent in unix package:
- syscall.SysProcIDMap
- syscall.Credential

Updates #214

PiperOrigin-RevId: 361332034

2 files changed, 5 insertions, 3 deletions

diff --git a/test/runtimes/proctor/lib/BUILD b/test/runtimes/proctor/lib/BUILD
index 0c8367dfe..f834f1b5a 100644
--- a/test/runtimes/proctor/lib/BUILD
+++ b/test/runtimes/proctor/lib/BUILD
@@ -13,6 +13,7 @@ go_library(
         "python.go",
     ],
     visibility = ["//test/runtimes/proctor:__pkg__"],
+    deps = ["@org_golang_x_sys//unix:go_default_library"],
 )
 
 go_test(
diff --git a/test/runtimes/proctor/lib/lib.go b/test/runtimes/proctor/lib/lib.go
index f2ba82498..36c60088a 100644
--- a/test/runtimes/proctor/lib/lib.go
+++ b/test/runtimes/proctor/lib/lib.go
@@ -22,7 +22,8 @@ import (
 	"os/signal"
 	"path/filepath"
 	"regexp"
-	"syscall"
+
+	"golang.org/x/sys/unix"
 )
 
 // TestRunner is an interface that must be implemented for each runtime
@@ -59,7 +60,7 @@ func TestRunnerForRuntime(runtime string) (TestRunner, error) {
 func PauseAndReap() {
 	// Get notified of any new children.
 	ch := make(chan os.Signal, 1)
-	signal.Notify(ch, syscall.SIGCHLD)
+	signal.Notify(ch, unix.SIGCHLD)
 
 	for {
 		if _, ok := <-ch; !ok {
@@ -69,7 +70,7 @@ func PauseAndReap() {
 
 		// Reap the child.
 		for {
-			if cpid, _ := syscall.Wait4(-1, nil, syscall.WNOHANG, nil); cpid < 1 {
+			if cpid, _ := unix.Wait4(-1, nil, unix.WNOHANG, nil); cpid < 1 {
 				break
 			}
 		}