83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// A binary that tests for opened or closed file descriptors as specified.
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#include <fcntl.h>
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#include <linux/fs.h>
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#include <cerrno>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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// The fd provided should not be open.
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void TestClosedFd(int fd) {
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int ret = fcntl(fd, F_GETFD);
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if (ret != -1) {
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printf("FAILURE: FD:%d is not closed\n", fd);
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exit(EXIT_FAILURE);
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}
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if (errno != EBADF) {
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printf(
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"FAILURE: fcntl(%d) returned errno=%d (%s), should have "
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"errno=EBADF/%d (%s)\n",
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fd, errno, strerror(errno), EBADF, strerror(EBADF));
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exit(EXIT_FAILURE);
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}
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}
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// The fd provided should be open.
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void TestOpenFd(int fd) {
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int ret = fcntl(fd, F_GETFD);
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if (ret == -1) {
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printf("FAILURE: fcntl(%d) returned -1 with errno=%d (%s)\n", fd, errno,
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strerror(errno));
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exit(EXIT_FAILURE);
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}
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}
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int main(int argc, char* argv[]) {
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// Disable caching.
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setbuf(stdin, nullptr);
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setbuf(stdout, nullptr);
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setbuf(stderr, nullptr);
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for (int i = 0; i <= INR_OPEN_MAX; i++) {
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bool should_be_closed = true;
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for (int j = 0; j < argc; j++) {
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errno = 0;
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int cur_fd = strtol(argv[j], nullptr, 10); // NOLINT
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if (errno != 0) {
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printf("FAILURE: strtol('%s') failed\n", argv[j]);
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exit(EXIT_FAILURE);
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}
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if (i == cur_fd) {
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should_be_closed = false;
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}
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}
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printf("%d:%c ", i, should_be_closed ? 'C' : 'O');
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if (should_be_closed) {
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TestClosedFd(i);
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} else {
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TestOpenFd(i);
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}
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}
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printf("OK: All tests went OK\n");
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return EXIT_SUCCESS;
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}
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