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https://github.com/chromium/crashpad.git
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892c29e8ba
- Various "FD" to "Handle" - Existing Multiprocess implementation moves to _posix. - Stub implementation for _win. At the moment, multiprocess_exec_win.cc contains implementations of both Multiprocess methods and MultiprocessExec functions. This will need more work in the future, but reflects the idea that all tests should be in terms of MultiprocessExec eventually. Currently, this works sufficiently to have util_test succeed (including multiprocess_exec_test, and the recently ported HTTPTransport tests.) R=mark@chromium.org BUG=crashpad:1, crashpad:7 Review URL: https://codereview.chromium.org/880763002
85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
// Copyright 2014 The Crashpad Authors. All rights reserved.
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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 <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <algorithm>
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#if defined(__APPLE__) || defined(__linux__)
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#define OS_POSIX 1
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#elif defined(_WIN32)
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#define OS_WIN 1
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#endif
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#if defined(OS_POSIX)
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#include <unistd.h>
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#elif defined(OS_WIN)
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#include <windows.h>
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#endif
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int main(int argc, char* argv[]) {
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#if defined(OS_POSIX)
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// Make sure that there’s nothing open at any FD higher than 3. All FDs other
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// than stdin, stdout, and stderr should have been closed prior to or at
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// exec().
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int max_fd = std::max(static_cast<int>(sysconf(_SC_OPEN_MAX)), OPEN_MAX);
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max_fd = std::max(max_fd, getdtablesize());
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for (int fd = STDERR_FILENO + 1; fd < max_fd; ++fd) {
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if (close(fd) == 0 || errno != EBADF) {
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abort();
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}
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}
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// Read a byte from stdin, expecting it to be a specific value.
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char c;
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ssize_t rv = read(STDIN_FILENO, &c, 1);
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if (rv != 1 || c != 'z') {
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abort();
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}
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// Write a byte to stdout.
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c = 'Z';
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rv = write(STDOUT_FILENO, &c, 1);
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if (rv != 1) {
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abort();
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}
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#elif defined(OS_WIN)
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// TODO(scottmg): Verify that only the handles we expect to be open, are.
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// Read a byte from stdin, expecting it to be a specific value.
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char c;
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DWORD bytes_read;
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HANDLE stdin_handle = GetStdHandle(STD_INPUT_HANDLE);
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if (!ReadFile(stdin_handle, &c, 1, &bytes_read, nullptr) ||
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bytes_read != 1 || c != 'z') {
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abort();
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}
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// Write a byte to stdout.
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c = 'Z';
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DWORD bytes_written;
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if (!WriteFile(
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GetStdHandle(STD_OUTPUT_HANDLE), &c, 1, &bytes_written, nullptr) ||
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bytes_written != 1) {
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abort();
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}
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#endif // OS_POSIX
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return 0;
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}
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