[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

2 files changed, 4 insertions, 3 deletions

diff --git a/pkg/sentry/fs/ramfs/BUILD b/pkg/sentry/fs/ramfs/BUILD
index 8ca823fb3..a51d00d86 100644
--- a/pkg/sentry/fs/ramfs/BUILD
+++ b/pkg/sentry/fs/ramfs/BUILD
@@ -22,6 +22,7 @@ go_library(
         "//pkg/syserror",
         "//pkg/usermem",
         "//pkg/waiter",
+        "@org_golang_x_sys//unix:go_default_library",
     ],
 )
 
diff --git a/pkg/sentry/fs/ramfs/dir.go b/pkg/sentry/fs/ramfs/dir.go
index f4fcddecb..19990f9db 100644
--- a/pkg/sentry/fs/ramfs/dir.go
+++ b/pkg/sentry/fs/ramfs/dir.go
@@ -17,8 +17,8 @@ package ramfs
 
 import (
 	"fmt"
-	"syscall"
 
+	"golang.org/x/sys/unix"
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/context"
 	"gvisor.dev/gvisor/pkg/sentry/fs"
@@ -378,8 +378,8 @@ func (d *Dir) Bind(ctx context.Context, dir *fs.Inode, name string, ep transport
 	inode, err := d.createInodeOperationsCommon(ctx, name, func() (*fs.Inode, error) {
 		return d.NewBoundEndpoint(ctx, dir, ep, perms)
 	})
-	if err == syscall.EEXIST {
-		return nil, syscall.EADDRINUSE
+	if err == unix.EEXIST {
+		return nil, unix.EADDRINUSE
 	}
 	if err != nil {
 		return nil, err