sandboxed-api/sandboxed_api/sandbox2/testcases/sanitizer.cc

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// Copyright 2019 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
//
// https://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.
// A binary that tests for opened or closed file descriptors as specified.
#include <fcntl.h>
#include <linux/fs.h>
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstring>
// The fd provided should not be open.
void TestClosedFd(int fd) {
int ret = fcntl(fd, F_GETFD);
if (ret != -1) {
printf("FAILURE: FD:%d is not closed\n", fd);
exit(EXIT_FAILURE);
}
if (errno != EBADF) {
printf(
"FAILURE: fcntl(%d) returned errno=%d (%s), should have "
"errno=EBADF/%d (%s)\n",
fd, errno, strerror(errno), EBADF, strerror(EBADF));
exit(EXIT_FAILURE);
}
}
// The fd provided should be open.
void TestOpenFd(int fd) {
int ret = fcntl(fd, F_GETFD);
if (ret == -1) {
printf("FAILURE: fcntl(%d) returned -1 with errno=%d (%s)\n", fd, errno,
strerror(errno));
exit(EXIT_FAILURE);
}
}
int main(int argc, char** argv) {
// Disable caching.
setbuf(stdin, nullptr);
setbuf(stdout, nullptr);
setbuf(stderr, nullptr);
for (int i = 0; i <= INR_OPEN_MAX; i++) {
bool should_be_closed = true;
for (int j = 0; j < argc; j++) {
errno = 0;
int cur_fd = strtol(argv[j], nullptr, 10); // NOLINT
if (errno != 0) {
printf("FAILURE: strtol('%s') failed\n", argv[j]);
exit(EXIT_FAILURE);
}
if (i == cur_fd) {
should_be_closed = false;
}
}
printf("%d:%c ", i, should_be_closed ? 'C' : 'O');
if (should_be_closed) {
TestClosedFd(i);
} else {
TestOpenFd(i);
}
}
printf("OK: All tests went OK\n");
return EXIT_SUCCESS;
}