Add CMake builds for the examples

PiperOrigin-RevId: 252045309
Change-Id: I57ffc3debbe64010b1f20b2e6df900b9916fa37f

CMakeLists.txt

@@ -65,6 +65,7 @@ find_package(gflags REQUIRED)
 find_package(glog REQUIRED)
 find_package(Protobuf REQUIRED)
 find_package(Libcap REQUIRED)
+find_package(ZLIB REQUIRED)
 
 # Make Bazel-like includes work
 configure_file(cmake/libcap_capability.h.in

sandboxed_api/sandbox2/CMakeLists.txt

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+add_subdirectory(examples)
 add_subdirectory(testcases)
 add_subdirectory(unwind)
 add_subdirectory(util)
@@ -467,11 +468,11 @@ add_library(sandbox2_forkingclient STATIC
   forkingclient.h
 )
 add_library(sandbox2::forkingclient ALIAS sandbox2_forkingclient)
-target_link_libraries(sandbox2_forkingclient PRIVATE
-  absl::memory
-  sandbox2::client
+target_link_libraries(sandbox2_forkingclient
+  PRIVATE absl::memory
           sandbox2::forkserver
           sapi::base
+  PUBLIC  sandbox2::client
 )
 
 # sandboxed_api/sandbox2:util

sandboxed_api/sandbox2/examples/CMakeLists.txt

@@ -0,0 +1,19 @@
+# Copyright 2019 Google LLC. All Rights Reserved.
+#
+# 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.
+
+add_subdirectory(crc4)
+add_subdirectory(custom_fork)
+add_subdirectory(static)
+add_subdirectory(tool)
+add_subdirectory(zlib)

sandboxed_api/sandbox2/examples/crc4/CMakeLists.txt

@@ -0,0 +1,45 @@
+# Copyright 2019 Google LLC. All Rights Reserved.
+#
+# 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.
+
+# sandboxed_api/sandbox2/examples/crc4:crc4sandbox
+add_executable(sandbox2_crc4sandbox
+  crc4sandbox.cc
+)
+add_executable(sandbox2::crc4sandbox ALIAS sandbox2_crc4sandbox)
+add_dependencies(sandbox2_crc4sandbox
+  sandbox2::crc4bin
+)
+target_link_libraries(sandbox2_crc4sandbox PRIVATE
+  absl::memory
+  sandbox2::bpf_helper
+  sandbox2::comms
+  sandbox2::runfiles
+  sandbox2::sandbox2
+  sapi::base
+  sapi::flags
+)
+
+# sandboxed_api/sandbox2/examples/crc4:crc4bin
+add_executable(crc4bin
+  crc4bin.cc
+)
+add_executable(sandbox2::crc4bin ALIAS crc4bin)
+target_link_libraries(crc4bin PRIVATE
+  absl::core_headers
+  sandbox2::client
+  sandbox2::comms
+  sandbox2::util
+  sapi::base
+  sapi::flags
+)

sandboxed_api/sandbox2/examples/custom_fork/CMakeLists.txt

@@ -0,0 +1,47 @@
+# Copyright 2019 Google LLC. All Rights Reserved.
+#
+# 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.
+
+# sandboxed_api/sandbox2/examples/custom_fork:custom_fork_sandbox
+add_executable(sandbox2_custom_fork_sandbox
+  custom_fork_sandbox.cc
+)
+add_executable(sandbox2::custom_fork_sandbox ALIAS sandbox2_custom_fork_sandbox)
+add_dependencies(sandbox2_custom_fork_sandbox
+  sandbox2::custom_fork_bin
+)
+target_link_libraries(sandbox2_custom_fork_sandbox PRIVATE
+  absl::core_headers
+  absl::memory
+  sandbox2::comms
+  sandbox2::forkserver
+  sandbox2::runfiles
+  sandbox2::sandbox2
+  sapi::base
+  sapi::flags
+  sapi::raw_logging
+)
+
+# sandboxed_api/sandbox2/examples/custom_fork:custom_fork_bin
+add_executable(custom_fork_bin
+  custom_fork_bin.cc
+)
+add_executable(sandbox2::custom_fork_bin ALIAS custom_fork_bin)
+target_link_libraries(custom_fork_bin PRIVATE
+  sandbox2::comms
+  sandbox2::forkingclient
+  sandbox2::util
+  sapi::base
+  sapi::flags
+  sapi::raw_logging
+)

sandboxed_api/sandbox2/examples/static/CMakeLists.txt

@@ -0,0 +1,40 @@
+# Copyright 2019 Google LLC. All Rights Reserved.
+#
+# 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.
+
+# sandboxed_api/sandbox2/examples/static:static_sandbox
+add_executable(sandbox2_static_sandbox
+  static_sandbox.cc
+)
+add_executable(sandbox2::static_sandbox ALIAS sandbox2_static_sandbox)
+add_dependencies(sandbox2_static_sandbox
+  sandbox2::static_bin
+)
+target_link_libraries(sandbox2_static_sandbox PRIVATE
+  absl::memory
+  sandbox2::bpf_helper
+  sandbox2::runfiles
+  sandbox2::sandbox2
+  sapi::base
+  sapi::flags
+)
+
+# sandboxed_api/sandbox2/examples/static:static_bin
+add_executable(static_bin
+  static_bin.cc
+)
+add_executable(sandbox2::static_bin ALIAS static_bin)
+target_link_libraries(static_bin PRIVATE
+  sapi::base
+  -static  # Fully static link
+)

sandboxed_api/sandbox2/examples/tool/CMakeLists.txt

@@ -0,0 +1,28 @@
+# Copyright 2019 Google LLC. All Rights Reserved.
+#
+# 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.
+
+# sandboxed_api/sandbox2/examples/tools:sandbox2tool
+add_executable(sandbox2_sandbox2tool
+  sandbox2tool.cc
+)
+add_executable(sandbox2::sandbox2tool ALIAS sandbox2_sandbox2tool)
+target_link_libraries(sandbox2_sandbox2tool PRIVATE
+  absl::memory
+  absl::strings
+  sandbox2::bpf_helper
+  sandbox2::sandbox2
+  sandbox2::util
+  sapi::base
+  sapi::flags
+)

sandboxed_api/sandbox2/examples/zlib/CMakeLists.txt

@@ -0,0 +1,41 @@
+# Copyright 2019 Google LLC. All Rights Reserved.
+#
+# 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.
+
+# sandboxed_api/sandbox2/examples/zlib:zpipe_sandbox
+add_executable(sandbox2_zpipe_sandbox
+  zpipe_sandbox.cc
+)
+add_executable(sandbox2::zpipe_sandbox ALIAS sandbox2_zpipe_sandbox)
+add_dependencies(sandbox2_zpipe_sandbox
+  sandbox2::zpipe
+)
+target_link_libraries(sandbox2_zpipe_sandbox PRIVATE
+  absl::memory
+  sandbox2::bpf_helper
+  sandbox2::comms
+  sandbox2::runfiles
+  sandbox2::sandbox2
+  sapi::base
+  sapi::flags
+)
+
+# sandboxed_api/sandbox2/examples/zlib:zpipe
+add_executable(zpipe
+  zpipe.c
+)
+add_executable(sandbox2::zpipe ALIAS zpipe)
+target_link_libraries(zpipe PRIVATE
+  ZLIB::ZLIB
+  -static  # Fully static link
+)

sandboxed_api/sandbox2/examples/zlib/zpipe_sandbox.cc

@@ -58,6 +58,7 @@ std::unique_ptr<sandbox2::Policy> GetPolicy() {
       .AllowSystemMalloc()
       .AllowExit()
       .EnableNamespaces()
+      .BlockSyscallWithErrno(__NR_access, ENOENT)
       .BuildOrDie();
 }