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// Copyright (c) 2015 Ryan Prichard
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
#include <cstdio>
#include <cstdlib>
#include <windows.h>
#include "../shared/WindowsSecurity.h"
#include "../shared/WinptyException.h"
const wchar_t *kPipeName = L"\\\\.\\pipe\\DebugServer";
// A message may not be larger than this size.
const int MSG_SIZE = 4096;
static void usage(const char *program, int code) {
printf("Usage: %s [--everyone]\n"
"\n"
"Creates the named pipe %ls and reads messages. Prints each\n"
"message to stdout. By default, only the current user can send messages.\n"
"Pass --everyone to let anyone send a message.\n"
"\n"
"Use the WINPTY_DEBUG environment variable to enable winpty trace output.\n"
"(e.g. WINPTY_DEBUG=trace for the default trace output.) Set WINPTYDBG=1\n"
"to enable trace with older winpty versions.\n",
program, kPipeName);
exit(code);
}
int main(int argc, char *argv[]) {
bool everyone = false;
for (int i = 1; i < argc; ++i) {
std::string arg = argv[i];
if (arg == "--everyone") {
everyone = true;
} else if (arg == "-h" || arg == "--help") {
usage(argv[0], 0);
} else {
usage(argv[0], 1);
}
}
SecurityDescriptor sd;
PSECURITY_ATTRIBUTES psa = nullptr;
SECURITY_ATTRIBUTES sa = {};
if (everyone) {
try {
sd = createPipeSecurityDescriptorOwnerFullControlEveryoneWrite();
} catch (const WinptyException &e) {
fprintf(stderr,
"error creating security descriptor: %ls\n", e.what());
exit(1);
}
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = sd.get();
psa = &sa;
}
HANDLE serverPipe = CreateNamedPipeW(
kPipeName,
/*dwOpenMode=*/PIPE_ACCESS_DUPLEX | FILE_FLAG_FIRST_PIPE_INSTANCE,
/*dwPipeMode=*/PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE |
rejectRemoteClientsPipeFlag(),
/*nMaxInstances=*/1,
/*nOutBufferSize=*/MSG_SIZE,
/*nInBufferSize=*/MSG_SIZE,
/*nDefaultTimeOut=*/10 * 1000,
psa);
if (serverPipe == INVALID_HANDLE_VALUE) {
fprintf(stderr, "error: could not create %ls pipe: error %u\n",
kPipeName, static_cast<unsigned>(GetLastError()));
exit(1);
}
char msgBuffer[MSG_SIZE + 1];
while (true) {
if (!ConnectNamedPipe(serverPipe, nullptr)) {
fprintf(stderr, "error: ConnectNamedPipe failed\n");
fflush(stderr);
exit(1);
}
DWORD bytesRead = 0;
if (!ReadFile(serverPipe, msgBuffer, MSG_SIZE, &bytesRead, nullptr)) {
fprintf(stderr, "error: ReadFile on pipe failed\n");
fflush(stderr);
DisconnectNamedPipe(serverPipe);
continue;
}
msgBuffer[bytesRead] = '\n';
fwrite(msgBuffer, 1, bytesRead + 1, stdout);
fflush(stdout);
DWORD bytesWritten = 0;
WriteFile(serverPipe, "OK", 2, &bytesWritten, nullptr);
DisconnectNamedPipe(serverPipe);
}
}
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