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//go:build linux
// +build linux
// Darwin does not support Fgetxattr and friends!
package xattr_tests
import (
"io/ioutil"
"syscall"
"testing"
"golang.org/x/sys/unix"
"github.com/rfjakob/gocryptfs/v2/tests/test_helpers"
)
func TestFdXattr(t *testing.T) {
attr := "user.foo"
fn := test_helpers.DefaultPlainDir + "/TestFdXattr"
err := ioutil.WriteFile(fn, nil, 0700)
if err != nil {
t.Fatalf("creating empty file failed: %v", err)
}
fd, err := syscall.Open(fn, syscall.O_RDONLY, 0)
if err != nil {
t.Fatal(err)
}
defer syscall.Close(fd)
buf := make([]byte, 1000)
sz, err := unix.Flistxattr(fd, buf)
if err != nil {
t.Error(err)
} else if sz != 0 {
t.Errorf("expected zero size, got %d", sz)
}
val1 := []byte("123456789")
unix.Fsetxattr(fd, attr, val1, 0)
sz, err = unix.Flistxattr(fd, buf)
if err != nil {
t.Fatal(err)
}
// Length of "user.attr" + terminating null byte
expectedSz := len(attr) + 1
if sz != expectedSz {
t.Errorf("expected size %d, got %d", expectedSz, sz)
}
str := ""
if sz > 0 {
str = string(buf[:sz-1])
}
if str != attr {
t.Errorf("expected name %q, got %q", attr, str)
}
// Check content
sz, err = unix.Fgetxattr(fd, attr, buf)
if err != nil {
t.Fatal(err)
}
str = string(buf[:sz])
if str != string(val1) {
t.Errorf("expected val %q, got %q", val1, str)
}
// Delete value
err = unix.Fremovexattr(fd, attr)
if err != nil {
t.Error(err)
}
sz, err = unix.Flistxattr(fd, buf)
if err != nil {
t.Error(err)
} else if sz != 0 {
t.Errorf("expected zero size, got %d", sz)
}
}
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