sysfs: consolidates errno coersion and maps EAGAIN and EINTR (#1113)

Signed-off-by: Adrian Cole <adrian@tetrate.io>
Co-authored-by: Takeshi Yoneda <takeshi@tetrate.io>

internal/gojs/errno_test.go

@@ -1,10 +1,6 @@
 package gojs
 
 import (
-	"errors"
-	"fmt"
-	"io/fs"
-	"os"
 	"syscall"
 	"testing"
 
@@ -17,6 +13,11 @@ func TestToErrno(t *testing.T) {
 		input    error
 		expected *Errno
 	}{
+		{
+			name:     "syscall.EAGAIN",
+			input:    syscall.EAGAIN,
+			expected: ErrnoAgain,
+		},
 		{
 			name:     "syscall.EBADF",
 			input:    syscall.EBADF,
@@ -27,6 +28,11 @@ func TestToErrno(t *testing.T) {
 			input:    syscall.EEXIST,
 			expected: ErrnoExist,
 		},
+		{
+			name:     "syscall.EINTR",
+			input:    syscall.EINTR,
+			expected: ErrnoIntr,
+		},
 		{
 			name:     "syscall.EINVAL",
 			input:    syscall.EINVAL,
@@ -87,46 +93,6 @@ func TestToErrno(t *testing.T) {
 			input:    syscall.Errno(0xfe),
 			expected: ErrnoIo,
 		},
-		{
-			name:     "PathError ErrInvalid",
-			input:    &os.PathError{Err: fs.ErrInvalid},
-			expected: ErrnoInval,
-		},
-		{
-			name:     "PathError ErrPermission",
-			input:    &os.PathError{Err: fs.ErrPermission},
-			expected: ErrnoPerm,
-		},
-		{
-			name:     "PathError ErrExist",
-			input:    &os.PathError{Err: fs.ErrExist},
-			expected: ErrnoExist,
-		},
-		{
-			name:     "PathError ErrNotExist",
-			input:    &os.PathError{Err: fs.ErrNotExist},
-			expected: ErrnoNoent,
-		},
-		{
-			name:     "PathError ErrClosed",
-			input:    &os.PathError{Err: fs.ErrClosed},
-			expected: ErrnoBadf,
-		},
-		{
-			name:     "PathError unknown == ErrnoIo",
-			input:    &os.PathError{Err: errors.New("ice cream")},
-			expected: ErrnoIo,
-		},
-		{
-			name:     "unknown == ErrnoIo",
-			input:    errors.New("ice cream"),
-			expected: ErrnoIo,
-		},
-		{
-			name:     "very wrapped unknown == ErrnoIo",
-			input:    fmt.Errorf("%w", fmt.Errorf("%w", fmt.Errorf("%w", errors.New("ice cream")))),
-			expected: ErrnoIo,
-		},
 	}
 
 	for _, tt := range tests {