func TestDirectoryJunction(t *testing.T) {
var tests = []dirLinkTest{
{
// Create link similar to what mklink does, by inserting \??\ at the front of absolute target.
name: "standard",
mklink: func(link, target string) error {
var t reparseData
t.addSubstituteName(`\??\` + target)
t.addPrintName(target)
return createMountPoint(link, &t)
},
},
{
// Do as junction utility https://technet.microsoft.com/en-au/sysinternals/bb896768.aspx does - set PrintNameLength to 0.
name: "have_blank_print_name",
mklink: func(link, target string) error {
var t reparseData
t.addSubstituteName(`\??\` + target)
t.addPrintName("")
return createMountPoint(link, &t)
},
},
}
output, _ := osexec.Command("cmd", "/c", "mklink", "/?").Output()
mklinkSupportsJunctionLinks := strings.Contains(string(output), " /J ")
if mklinkSupportsJunctionLinks {
tests = append(tests,
dirLinkTest{
name: "use_mklink_cmd",
mklink: func(link, target string) error {
output, err := osexec.Command("cmd", "/c", "mklink", "/J", link, target).CombinedOutput()
if err != nil {
t.Errorf("failed to run mklink %v %v: %v %q", link, target, err, output)
}
return nil
},
},
)
} else {
t.Log(`skipping "use_mklink_cmd" test, mklink does not supports directory junctions`)
}
testDirLinks(t, tests)
}
func TestDirectorySymbolicLink(t *testing.T) {
var tests []dirLinkTest
output, _ := osexec.Command("cmd", "/c", "mklink", "/?").Output()
mklinkSupportsDirectorySymbolicLinks := strings.Contains(string(output), " /D ")
if mklinkSupportsDirectorySymbolicLinks {
tests = append(tests,
dirLinkTest{
name: "use_mklink_cmd",
mklink: func(link, target string) error {
output, err := osexec.Command("cmd", "/c", "mklink", "/D", link, target).CombinedOutput()
if err != nil {
t.Errorf("failed to run mklink %v %v: %v %q", link, target, err, output)
}
return nil
},
},
)
} else {
t.Log(`skipping "use_mklink_cmd" test, mklink does not supports directory symbolic links`)
}
// The rest of these test requires SeCreateSymbolicLinkPrivilege to be held.
runtime.LockOSThread()
defer runtime.UnlockOSThread()
err := windows.ImpersonateSelf(windows.SecurityImpersonation)
if err != nil {
t.Fatal(err)
}
defer windows.RevertToSelf()
err = enableCurrentThreadPrivilege("SeCreateSymbolicLinkPrivilege")
if err != nil {
t.Skipf(`skipping some tests, could not enable "SeCreateSymbolicLinkPrivilege": %v`, err)
}
tests = append(tests,
dirLinkTest{
name: "use_os_pkg",
mklink: func(link, target string) error {
return os.Symlink(target, link)
},
},
dirLinkTest{
// Create link similar to what mklink does, by inserting \??\ at the front of absolute target.
name: "standard",
mklink: func(link, target string) error {
var t reparseData
t.addPrintName(target)
t.addSubstituteName(`\??\` + target)
return createSymbolicLink(link, &t, false)
},
},
dirLinkTest{
name: "relative",
mklink: func(link, target string) error {
var t reparseData
t.addSubstituteNameNoNUL(filepath.Base(target))
t.addPrintNameNoNUL(filepath.Base(target))
return createSymbolicLink(link, &t, true)
},
},
)
testDirLinks(t, tests)
}