[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

3 files changed, 6 insertions, 6 deletions

diff --git a/pkg/sentry/syscalls/linux/BUILD b/pkg/sentry/syscalls/linux/BUILD
index 4188502dc..3dcf36a96 100644
--- a/pkg/sentry/syscalls/linux/BUILD
+++ b/pkg/sentry/syscalls/linux/BUILD
@@ -102,5 +102,6 @@ go_library(
         "//pkg/syserror",
         "//pkg/usermem",
         "//pkg/waiter",
+        "@org_golang_x_sys//unix:go_default_library",
     ],
 )
diff --git a/pkg/sentry/syscalls/linux/sys_file.go b/pkg/sentry/syscalls/linux/sys_file.go
index a6253626e..fd9649340 100644
--- a/pkg/sentry/syscalls/linux/sys_file.go
+++ b/pkg/sentry/syscalls/linux/sys_file.go
@@ -15,8 +15,7 @@
 package linux
 
 import (
-	"syscall"
-
+	"golang.org/x/sys/unix"
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/context"
 	"gvisor.dev/gvisor/pkg/marshal/primitive"
@@ -368,7 +367,7 @@ func createAt(t *kernel.Task, dirFD int32, addr usermem.Addr, flags uint, mode l
 
 			// Are we able to resolve further?
 			if remainingTraversals == 0 {
-				return syscall.ELOOP
+				return unix.ELOOP
 			}
 
 			// Resolve the symlink to a path via Readlink.
@@ -2217,7 +2216,7 @@ func MemfdCreate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S
 	allowSeals := flags&linux.MFD_ALLOW_SEALING != 0
 	cloExec := flags&linux.MFD_CLOEXEC != 0
 
-	name, err := t.CopyInString(addr, syscall.PathMax-len(memfdPrefix))
+	name, err := t.CopyInString(addr, unix.PathMax-len(memfdPrefix))
 	if err != nil {
 		return 0, nil, err
 	}
diff --git a/pkg/sentry/syscalls/linux/sys_thread.go b/pkg/sentry/syscalls/linux/sys_thread.go
index 8e7ac0ffe..44738c40c 100644
--- a/pkg/sentry/syscalls/linux/sys_thread.go
+++ b/pkg/sentry/syscalls/linux/sys_thread.go
@@ -16,8 +16,8 @@ package linux
 
 import (
 	"path"
-	"syscall"
 
+	"golang.org/x/sys/unix"
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/marshal/primitive"
 	"gvisor.dev/gvisor/pkg/sentry/arch"
@@ -417,7 +417,7 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal
 	si.SetUID(int32(wr.UID))
 	// TODO(b/73541790): convert kernel.ExitStatus to functions and make
 	// WaitResult.Status a linux.WaitStatus.
-	s := syscall.WaitStatus(wr.Status)
+	s := unix.WaitStatus(wr.Status)
 	switch {
 	case s.Exited():
 		si.Code = arch.CLD_EXITED