syscall_test.go RawHistoryFolder

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2023 The Ebitengine Authors
3
4package purego_test
5
6import (
7	"os"
8	"runtime"
9	"testing"
10	"unsafe"
11
12	"github.com/ebitengine/purego"
13	"github.com/ebitengine/purego/internal/load"
14)
15
16func TestOS(t *testing.T) {
17	// set and unset an environment variable since this calls into fakecgo.
18	err := os.Setenv("TESTING", "SOMETHING")
19	if err != nil {
20		t.Errorf("failed to Setenv: %s", err)
21	}
22	err = os.Unsetenv("TESTING")
23	if err != nil {
24		t.Errorf("failed to Unsetenv: %s", err)
25	}
26}
27
28func TestErrno(t *testing.T) {
29	if runtime.GOOS != "darwin" {
30		t.Skip("platform does not support returning errno from syscall")
31	}
32
33	libc, err := load.OpenLibrary("/usr/lib/libSystem.B.dylib")
34	if err != nil {
35		t.Fatal(err)
36	}
37
38	openSym, err := load.OpenSymbol(libc, "open")
39	if err != nil {
40		t.Fatal(err)
41	}
42
43	r1, _, errno := purego.SyscallN(openSym, uintptr(unsafe.Pointer(&[]byte("_file_that_does_not_exist_\x00")[0])), uintptr(os.O_RDWR))
44	if int32(r1) != -1 {
45		t.Errorf("open returned %d, wanted -1", r1)
46	}
47
48	var strerror func(int32) string
49	purego.RegisterLibFunc(&strerror, libc, "strerror")
50
51	const expected = "No such file or directory"
52	got := strerror(int32(errno))
53	if got != expected {
54		t.Errorf("strerror returned %q, wanted \"%s\"", got, expected)
55	}
56}