syscallcompat: Drop Unlinkat emulation on macOS.

1 files changed, 55 insertions, 0 deletions

diff --git a/internal/syscallcompat/sys_common_test.go b/internal/syscallcompat/sys_common_test.go
index 3e38eb2..4556279 100644
--- a/internal/syscallcompat/sys_common_test.go
+++ b/internal/syscallcompat/sys_common_test.go
@@ -5,6 +5,8 @@ import (
 	"os"
 	"syscall"
 	"testing"
+
+	"golang.org/x/sys/unix"
 )
 
 func TestReadlinkat(t *testing.T) {
@@ -100,6 +102,59 @@ func TestRenameat(t *testing.T) {
 	}
 }
 
+func TestUnlinkat(t *testing.T) {
+	os.Mkdir(tmpDir+"/unlink1", 0700)
+	dirfd, err := os.Open(tmpDir + "/unlink1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer dirfd.Close()
+	// Try to delete file
+	fd, err := os.Create(tmpDir + "/unlink1/f1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	fd.Close()
+	err = Unlinkat(int(dirfd.Fd()), "f1", 0)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = os.Stat(tmpDir + "/unlink1/f1")
+	if err == nil {
+		t.Fatalf("file not deleted!")
+	}
+	// Try to delete dir
+	err = os.Mkdir(tmpDir+"/unlink1/d1", 0700)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = Unlinkat(int(dirfd.Fd()), "d1", 0)
+	if err == nil {
+		t.Fatalf("this should fail due to missing AT_REMOVEDIR flag")
+	}
+	err = Unlinkat(int(dirfd.Fd()), "d1", unix.AT_REMOVEDIR)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = os.Stat(tmpDir + "/unlink1/d1")
+	if err == nil {
+		t.Fatalf("dir not deleted!")
+	}
+	// Test with absolute path
+	err = os.Mkdir(tmpDir+"/unlink1/d1", 0700)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = Unlinkat(-1, tmpDir+"/unlink1/d1", unix.AT_REMOVEDIR)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = os.Stat(tmpDir + "/unlink1/d1")
+	if err == nil {
+		t.Fatalf("dir not deleted!")
+	}
+}
+
 func TestFchmodat(t *testing.T) {
 	regular := "TestFchmodat_Regular"
 	f, err := os.OpenFile(tmpDir+"/"+regular, os.O_CREATE|os.O_WRONLY, 0000)