package syscallcompat import ( "fmt" "io/ioutil" "os" "syscall" "testing" "golang.org/x/sys/unix" ) 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) } func TestEmulateOpenat(t *testing.T) { _, err := emulateOpenat(tmpDirFd, "testOpenAt", 0, 0) if err == nil { t.Errorf("should have failed") } fd, err := os.Create(tmpDir + "/testOpenAt") if err != nil { t.Fatal(err) } fd.Close() rawFd, err := emulateOpenat(tmpDirFd, "testOpenAt", 0, 0) if err != nil { t.Fatal(err) } defer syscall.Close(rawFd) if rawFd < 0 { t.Fatalf("rawFd=%d", rawFd) } // Test with absolute path rawFd, err = emulateOpenat(-1, tmpDir + "/testOpenAt", 0, 0) if err != nil { t.Fatal(err) } defer syscall.Close(rawFd) if rawFd < 0 { t.Fatalf("rawFd=%d", rawFd) } } func TestEmulateRenameat(t *testing.T) { os.Mkdir(tmpDir+"/dir1", 0700) dir1, err := os.Open(tmpDir + "/dir1") if err != nil { t.Fatal(err) } defer dir1.Close() os.Mkdir(tmpDir+"/dir2", 0700) dir2, err := os.Open(tmpDir + "/dir2") if err != nil { t.Fatal(err) } defer dir2.Close() fd, err := os.Create(tmpDir + "/dir1/f1") if err != nil { t.Fatal(err) } fd.Close() err = emulateRenameat(int(dir1.Fd()), "f1", int(dir2.Fd()), "f2") if err != nil { t.Fatal(err) } _, err = os.Stat(tmpDir + "/dir2/f2") if err != nil { t.Fatal(err) } // Test with absolute path err = emulateRenameat(-1, tmpDir + "/dir2/f2", -1, tmpDir + "/dir2/f1") if err != nil { t.Fatal(err) } _, err = os.Stat(tmpDir + "/dir2/f1") if err != nil { t.Fatal(err) } } func TestEmulateUnlinkat(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 = emulateUnlinkat(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 = emulateUnlinkat(int(dirfd.Fd()), "d1", 0) if err == nil { t.Fatalf("this should fail due to missing AT_REMOVEDIR flag") } err = emulateUnlinkat(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 = emulateUnlinkat(-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 TestEmulateMknodat(t *testing.T) { err := emulateMknodat(tmpDirFd, "fifo1", unix.S_IFIFO, 0) if err != nil { t.Fatal(err) } _, err = os.Stat(tmpDir + "/fifo1") if err != nil { t.Fatal(err) } // Test with absolute path err = emulateMknodat(-1, tmpDir + "/fifo2", unix.S_IFIFO, 0) if err != nil { t.Fatal(err) } _, err = os.Stat(tmpDir + "/fifo2") if err != nil { t.Fatal(err) } } func TestEmulateFchmodat(t *testing.T) { fd, err := os.Create(tmpDir + "/chmod") if err != nil { t.Fatal(err) } err = fd.Chmod(0654) if err != nil { t.Fatal(err) } fd.Close() // Chmod a normal file err = emulateFchmodat(tmpDirFd, "chmod", 0600, 0) if err != nil { t.Fatal(err) } var st syscall.Stat_t err = syscall.Lstat(tmpDir+"/chmod", &st) if err != nil { t.Fatal(err) } if st.Mode != 0100600 { t.Fatalf("Wrong mode: have %o, want %o", st.Mode, 0100600) } // Chmod a symlink (original file should not change) err = os.Symlink(tmpDir+"/chmod", tmpDir+"/chmodSymlink") if err != nil { t.Fatal(err) } err = emulateFchmodat(tmpDirFd, "chmodSymlink", 0123, unix.AT_SYMLINK_NOFOLLOW) if err != nil { t.Fatal(err) } err = syscall.Lstat(tmpDir+"/chmod", &st) if err != nil { t.Fatal(err) } if st.Mode != 0100600 { t.Fatalf("Wrong mode: have %o, want %o", st.Mode, 0100600) } // Test with absolute path err = emulateFchmodat(-1, tmpDir + "/chmod", 0400, 0) if err != nil { t.Fatal(err) } err = syscall.Lstat(tmpDir + "/chmod", &st) if err != nil { t.Fatal(err) } if st.Mode != 0100400 { t.Fatalf("Wrong mode: have %o, want %o", st.Mode, 0100400) } } func TestEmulateFchownat(t *testing.T) { t.Skipf("TODO") } func TestEmulateSymlinkat(t *testing.T) { err := emulateSymlinkat("/foo/bar/baz", tmpDirFd, "symlink1") if err != nil { t.Fatal(err) } var st syscall.Stat_t err = syscall.Lstat(tmpDir+"/symlink1", &st) if err != nil { t.Fatal(err) } if st.Mode != 0120777 { t.Fatalf("Wrong mode, have %o, want 0120777", st.Mode) } // Test with absolute path err = emulateSymlinkat("/foo/bar/baz", -1, tmpDir + "/symlink2") if err != nil { t.Fatal(err) } err = syscall.Lstat(tmpDir + "/symlink2", &st) if err != nil { t.Fatal(err) } if st.Mode != 0120777 { t.Fatalf("Wrong mode, have %o, want 0120777", st.Mode) } } func TestEmulateMkdirat(t *testing.T) { err := emulateMkdirat(tmpDirFd, "mkdirat", 0100) if err != nil { t.Fatal(err) } fi, err := os.Stat(tmpDir + "/mkdirat") if err != nil { t.Fatal(err) } if !fi.IsDir() { t.Fatalf("mkdirat did not create a directory") } // Test with absolute path err = emulateMkdirat(-1, tmpDir + "/mkdirat2", 0100) if err != nil { t.Fatal(err) } fi, err = os.Stat(tmpDir + "/mkdirat2") if err != nil { t.Fatal(err) } if !fi.IsDir() { t.Fatalf("mkdirat did not create a directory") } }