46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
// Copyright 2018 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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// http://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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#include <errno.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <iostream>
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#include "absl/strings/numbers.h"
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int main(int argc, char** argv) {
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if (argc != 2) {
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std::cerr << "need two arguments, got " << argc;
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exit(1);
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}
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int fd;
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if (!absl::SimpleAtoi(argv[1], &fd)) {
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std::cerr << "fd: " << argv[1] << " could not be parsed" << std::endl;
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exit(1);
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}
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struct stat s;
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if (fstat(fd, &s) == 0) {
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std::cerr << "fd: " << argv[1] << " should not be valid" << std::endl;
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exit(2);
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}
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if (errno != EBADF) {
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std::cerr << "fstat fd: " << argv[1] << " got errno: " << errno
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<< " wanted: " << EBADF << std::endl;
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exit(1);
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}
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return 0;
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}
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