syscallcompat: move test setup into its own file

The infrastructure will also be used by the upcoming
OpenNofollow tests.

1 files changed, 47 insertions, 0 deletions

diff --git a/internal/syscallcompat/main_test.go b/internal/syscallcompat/main_test.go
new file mode 100644
index 0000000..43db0e1
--- /dev/null
+++ b/internal/syscallcompat/main_test.go
@@ -0,0 +1,47 @@
+package syscallcompat
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+var tmpDir string
+var tmpDirFd int
+
+func TestMain(m *testing.M) {
+	origWd, err := os.Getwd()
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	parent := "/tmp/gocryptfs-test-parent"
+	err = os.MkdirAll(parent, 0700)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	tmpDir, err = ioutil.TempDir(parent, "syscallcompat")
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	dirf, err := os.Open(tmpDir)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	defer dirf.Close()
+	tmpDirFd = int(dirf.Fd())
+	// Run the tests
+	r := m.Run()
+	// Check that we are in the same directory again (the emulated syscalls
+	// use Fchdir a lot)
+	cwd, _ := os.Getwd()
+	if cwd != origWd {
+		fmt.Printf("working dir has changed from %q to %q", origWd, cwd)
+		os.Exit(1)
+	}
+	os.Exit(r)
+}