// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <signal.h>

#include "gtest/gtest.h"
#include "test/util/test_util.h"

namespace gvisor {
namespace testing {

namespace {

TEST(SigactionTest, GetLessThanOrEqualToZeroFails) {
  struct sigaction act;
  memset(&act, 0, sizeof(act));
  ASSERT_THAT(sigaction(-1, NULL, &act), SyscallFailsWithErrno(EINVAL));
  ASSERT_THAT(sigaction(0, NULL, &act), SyscallFailsWithErrno(EINVAL));
}

TEST(SigactionTest, SetLessThanOrEqualToZeroFails) {
  struct sigaction act;
  memset(&act, 0, sizeof(act));
  ASSERT_THAT(sigaction(0, &act, NULL), SyscallFailsWithErrno(EINVAL));
  ASSERT_THAT(sigaction(0, &act, NULL), SyscallFailsWithErrno(EINVAL));
}

TEST(SigactionTest, GetGreaterThanMaxFails) {
  struct sigaction act;
  memset(&act, 0, sizeof(act));
  ASSERT_THAT(sigaction(SIGRTMAX + 1, NULL, &act),
              SyscallFailsWithErrno(EINVAL));
}

TEST(SigactionTest, SetGreaterThanMaxFails) {
  struct sigaction act;
  memset(&act, 0, sizeof(act));
  ASSERT_THAT(sigaction(SIGRTMAX + 1, &act, NULL),
              SyscallFailsWithErrno(EINVAL));
}

TEST(SigactionTest, SetSigkillFails) {
  struct sigaction act;
  memset(&act, 0, sizeof(act));
  ASSERT_THAT(sigaction(SIGKILL, NULL, &act), SyscallSucceeds());
  ASSERT_THAT(sigaction(SIGKILL, &act, NULL), SyscallFailsWithErrno(EINVAL));
}

TEST(SigactionTest, SetSigstopFails) {
  struct sigaction act;
  memset(&act, 0, sizeof(act));
  ASSERT_THAT(sigaction(SIGSTOP, NULL, &act), SyscallSucceeds());
  ASSERT_THAT(sigaction(SIGSTOP, &act, NULL), SyscallFailsWithErrno(EINVAL));
}

}  // namespace

}  // namespace testing
}  // namespace gvisor