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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package syscall_test
import (
"fmt"
"internal/testenv"
"os"
"os/exec"
"path/filepath"
"strings"
"syscall"
"testing"
)
func TestOpen_Dir(t *testing.T) {
dir := t.TempDir()
h, err := syscall.Open(dir, syscall.O_RDONLY, 0)
if err != nil {
t.Fatalf("Open failed: %v", err)
}
syscall.CloseHandle(h)
h, err = syscall.Open(dir, syscall.O_RDONLY|syscall.O_TRUNC, 0)
if err == nil {
t.Error("Open should have failed")
} else {
syscall.CloseHandle(h)
}
h, err = syscall.Open(dir, syscall.O_RDONLY|syscall.O_CREAT, 0)
if err == nil {
t.Error("Open should have failed")
} else {
syscall.CloseHandle(h)
}
}
func TestComputerName(t *testing.T) {
name, err := syscall.ComputerName()
if err != nil {
t.Fatalf("ComputerName failed: %v", err)
}
if len(name) == 0 {
t.Error("ComputerName returned empty string")
}
}
func TestWin32finddata(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "long_name.and_extension")
f, err := os.Create(path)
if err != nil {
t.Fatalf("failed to create %v: %v", path, err)
}
f.Close()
type X struct {
fd syscall.Win32finddata
got byte
pad [10]byte // to protect ourselves
}
var want byte = 2 // it is unlikely to have this character in the filename
x := X{got: want}
pathp, _ := syscall.UTF16PtrFromString(path)
h, err := syscall.FindFirstFile(pathp, &(x.fd))
if err != nil {
t.Fatalf("FindFirstFile failed: %v", err)
}
err = syscall.FindClose(h)
if err != nil {
t.Fatalf("FindClose failed: %v", err)
}
if x.got != want {
t.Fatalf("memory corruption: want=%d got=%d", want, x.got)
}
}
func abort(funcname string, err error) {
panic(funcname + " failed: " + err.Error())
}
func ExampleLoadLibrary() {
h, err := syscall.LoadLibrary("kernel32.dll")
if err != nil {
abort("LoadLibrary", err)
}
defer syscall.FreeLibrary(h)
proc, err := syscall.GetProcAddress(h, "GetVersion")
if err != nil {
abort("GetProcAddress", err)
}
r, _, _ := syscall.Syscall(uintptr(proc), 0, 0, 0, 0)
major := byte(r)
minor := uint8(r >> 8)
build := uint16(r >> 16)
print("windows version ", major, ".", minor, " (Build ", build, ")\n")
}
func TestTOKEN_ALL_ACCESS(t *testing.T) {
if syscall.TOKEN_ALL_ACCESS != 0xF01FF {
t.Errorf("TOKEN_ALL_ACCESS = %x, want 0xF01FF", syscall.TOKEN_ALL_ACCESS)
}
}
func TestStdioAreInheritable(t *testing.T) {
testenv.MustHaveGoBuild(t)
testenv.MustHaveCGO(t)
testenv.MustHaveExecPath(t, "gcc")
tmpdir := t.TempDir()
// build go dll
const dlltext = `
package main
import "C"
import (
"fmt"
)
//export HelloWorld
func HelloWorld() {
fmt.Println("Hello World")
}
func main() {}
`
dllsrc := filepath.Join(tmpdir, "helloworld.go")
err := os.WriteFile(dllsrc, []byte(dlltext), 0644)
if err != nil {
t.Fatal(err)
}
dll := filepath.Join(tmpdir, "helloworld.dll")
cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", dll, "-buildmode", "c-shared", dllsrc)
out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("failed to build go library: %s\n%s", err, out)
}
// build c exe
const exetext = `
#include <stdlib.h>
#include <windows.h>
int main(int argc, char *argv[])
{
system("hostname");
((void(*)(void))GetProcAddress(LoadLibraryA(%q), "HelloWorld"))();
system("hostname");
return 0;
}
`
exe := filepath.Join(tmpdir, "helloworld.exe")
cmd = exec.Command("gcc", "-o", exe, "-xc", "-")
cmd.Stdin = strings.NewReader(fmt.Sprintf(exetext, dll))
out, err = testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("failed to build c executable: %s\n%s", err, out)
}
out, err = exec.Command(exe).Output()
if err != nil {
t.Fatalf("c program execution failed: %v: %v", err, string(out))
}
hostname, err := os.Hostname()
if err != nil {
t.Fatal(err)
}
have := strings.ReplaceAll(string(out), "\n", "")
have = strings.ReplaceAll(have, "\r", "")
want := fmt.Sprintf("%sHello World%s", hostname, hostname)
if have != want {
t.Fatalf("c program output is wrong: got %q, want %q", have, want)
}
}
func TestGetwd_DoesNotPanicWhenPathIsLong(t *testing.T) {
// Regression test for https://github.com/golang/go/issues/60051.
// The length of a filename is also limited, so we can't reproduce the
// crash by creating a single directory with a very long name; we need two
// layers.
a200 := strings.Repeat("a", 200)
dirname := filepath.Join(t.TempDir(), a200, a200)
err := os.MkdirAll(dirname, 0o700)
if err != nil {
t.Skipf("MkdirAll failed: %v", err)
}
err = os.Chdir(dirname)
if err != nil {
t.Skipf("Chdir failed: %v", err)
}
// Change out of the temporary directory so that we don't inhibit its
// removal during test cleanup.
defer os.Chdir(`\`)
syscall.Getwd()
}
func TestGetStartupInfo(t *testing.T) {
var si syscall.StartupInfo
err := syscall.GetStartupInfo(&si)
if err != nil {
// see https://go.dev/issue/31316
t.Fatalf("GetStartupInfo: got error %v, want nil", err)
}
}
func FuzzUTF16FromString(f *testing.F) {
f.Add("hi") // ASCII
f.Add("â") // latin1
f.Add("ねこ") // plane 0
f.Add("😃") // extra Plane 0
f.Add("\x90") // invalid byte
f.Add("\xe3\x81") // truncated
f.Add("\xe3\xc1\x81") // invalid middle byte
f.Fuzz(func(t *testing.T, tst string) {
res, err := syscall.UTF16FromString(tst)
if err != nil {
if strings.Contains(tst, "\x00") {
t.Skipf("input %q contains a NUL byte", tst)
}
t.Fatalf("UTF16FromString(%q): %v", tst, err)
}
t.Logf("UTF16FromString(%q) = %04x", tst, res)
if len(res) < 1 || res[len(res)-1] != 0 {
t.Fatalf("missing NUL terminator")
}
if len(res) > len(tst)+1 {
t.Fatalf("len(%04x) > len(%q)+1", res, tst)
}
})
}
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