Make ExtractErrno a function

PiperOrigin-RevId: 306891171

3 files changed, 8 insertions, 8 deletions

diff --git a/pkg/sentry/kernel/task_run.go b/pkg/sentry/kernel/task_run.go
index 799cbcd93..2ba8d7e63 100644
--- a/pkg/sentry/kernel/task_run.go
+++ b/pkg/sentry/kernel/task_run.go
@@ -353,7 +353,7 @@ func (app *runApp) execute(t *Task) taskRunState {
 	default:
 		// What happened? Can't continue.
 		t.Warningf("Unexpected SwitchToApp error: %v", err)
-		t.PrepareExit(ExitStatus{Code: t.ExtractErrno(err, -1)})
+		t.PrepareExit(ExitStatus{Code: ExtractErrno(err, -1)})
 		return (*runExit)(nil)
 	}
 }
diff --git a/pkg/sentry/kernel/task_signals.go b/pkg/sentry/kernel/task_signals.go
index 6aa798346..f07de2089 100644
--- a/pkg/sentry/kernel/task_signals.go
+++ b/pkg/sentry/kernel/task_signals.go
@@ -174,7 +174,7 @@ func (t *Task) deliverSignal(info *arch.SignalInfo, act arch.SignalAct) taskRunS
 					fallthrough
 				case (sre == ERESTARTSYS && !act.IsRestart()):
 					t.Debugf("Not restarting syscall %d after errno %d: interrupted by signal %d", t.Arch().SyscallNo(), sre, info.Signo)
-					t.Arch().SetReturn(uintptr(-t.ExtractErrno(syserror.EINTR, -1)))
+					t.Arch().SetReturn(uintptr(-ExtractErrno(syserror.EINTR, -1)))
 				default:
 					t.Debugf("Restarting syscall %d after errno %d: interrupted by signal %d", t.Arch().SyscallNo(), sre, info.Signo)
 					t.Arch().RestartSyscall()
diff --git a/pkg/sentry/kernel/task_syscall.go b/pkg/sentry/kernel/task_syscall.go
index 3d7a734ef..c9db78e06 100644
--- a/pkg/sentry/kernel/task_syscall.go
+++ b/pkg/sentry/kernel/task_syscall.go
@@ -312,7 +312,7 @@ func (t *Task) doSyscallInvoke(sysno uintptr, args arch.SyscallArguments) taskRu
 			return ctrl.next
 		}
 	} else if err != nil {
-		t.Arch().SetReturn(uintptr(-t.ExtractErrno(err, int(sysno))))
+		t.Arch().SetReturn(uintptr(-ExtractErrno(err, int(sysno))))
 		t.haveSyscallReturn = true
 	} else {
 		t.Arch().SetReturn(rval)
@@ -431,7 +431,7 @@ func (t *Task) doVsyscallInvoke(sysno uintptr, args arch.SyscallArguments, calle
 			// A return is not emulated in this case.
 			return (*runApp)(nil)
 		}
-		t.Arch().SetReturn(uintptr(-t.ExtractErrno(err, int(sysno))))
+		t.Arch().SetReturn(uintptr(-ExtractErrno(err, int(sysno))))
 	}
 	t.Arch().SetIP(t.Arch().Value(caller))
 	t.Arch().SetStack(t.Arch().Stack() + uintptr(t.Arch().Width()))
@@ -441,7 +441,7 @@ func (t *Task) doVsyscallInvoke(sysno uintptr, args arch.SyscallArguments, calle
 // ExtractErrno extracts an integer error number from the error.
 // The syscall number is purely for context in the error case. Use -1 if
 // syscall number is unknown.
-func (t *Task) ExtractErrno(err error, sysno int) int {
+func ExtractErrno(err error, sysno int) int {
 	switch err := err.(type) {
 	case nil:
 		return 0
@@ -455,11 +455,11 @@ func (t *Task) ExtractErrno(err error, sysno int) int {
 		// handled (and the SIGBUS is delivered).
 		return int(syscall.EFAULT)
 	case *os.PathError:
-		return t.ExtractErrno(err.Err, sysno)
+		return ExtractErrno(err.Err, sysno)
 	case *os.LinkError:
-		return t.ExtractErrno(err.Err, sysno)
+		return ExtractErrno(err.Err, sysno)
 	case *os.SyscallError:
-		return t.ExtractErrno(err.Err, sysno)
+		return ExtractErrno(err.Err, sysno)
 	default:
 		if errno, ok := syserror.TranslateError(err); ok {
 			return int(errno)