Всем привет, только начинаю изучать WinAPI и столкнулся с проблемой при записи в анонимный канал, данные в него не записываются, помогите исправить ошибку.
клиент| Код |
#include <windows.h>
#include <conio.h>
int main(int argc, char *argv[])
{
HANDLE hWritePipe;
hWritePipe = (HANDLE)atoi(argv[1]);
//wait for command to start write into anonymous pipe
_cputs("Press any key to start communication.\n");
_getch();
//write into AP
for (int i = 0; i < 10; i++)
{
DWORD dwBytesWritten;
if (!WriteFile(hWritePipe, &i, sizeof(i), &dwBytesWritten, NULL))
{
_cputs("Write to file failed.\n");
_cputs("Press any key to finish.\n");
_getch();
return GetLastError();
}
_cprintf("The number %d is written to the pipe.\n", i);
Sleep(500);
}
//close pipe descriptor
CloseHandle(hWritePipe);
_cputs("The process finished writing to the pipe.\n");
_cputs("Press any key to exit.\n");
_getch();
return 0;
}
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сервер| Код |
#include <windows.h>
#include <conio.h>
int main()
{
char lpszComLine[80]; //for comline
STARTUPINFO si;
PROCESS_INFORMATION pi;
HANDLE hWritePipe, hReadPipe, hInheritWritePipe;
//create anonymous pipe
if (!CreatePipe(
&hReadPipe, //descriptor for read
&hWritePipe, //descriptor for write
NULL, //security attributes by default
//hReadPipe and hWritePipe unheritable
0)) //buffer size by default
{
_cputs("Create pipe failed.\n");
_cputs("Press any key to finish.\n");
_getch();
return GetLastError();
}
else _cputs("Pipe created succesfully.\n");
//create inheritable replicate of hWritePipe
if (!DuplicateHandle(
GetCurrentProcess(), //current process descriptor
hWritePipe, //initial pipe descriptor
GetCurrentProcess(),
&hInheritWritePipe, //pipe new descriptor
0,
TRUE, //new descriptor is inheritable
DUPLICATE_SAME_ACCESS)) //access unchanged
{
_cputs("Duplicate handle failed.\n");
_cputs("Press any key to finish.\n");
_getch();
return GetLastError();
}
else _cputs("Duplicate created succesfully.\n");
//close unnecessary descriptor
CloseHandle(hWritePipe);
//set attributes for new descriptor
ZeroMemory(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
//form comline
wsprintf(lpszComLine, "D:\\Code\\Client.exe %d",
(int)hInheritWritePipe);
//launch new console process
if (!CreateProcess(
NULL, //process name
lpszComLine, //com line
NULL, //sec attrs by default
NULL, //sec attrs of primary thread by default
TRUE, //inheritable descriptors of current process
//are inherited by new process
CREATE_NEW_CONSOLE,
NULL, //use environment of process-ancestor
NULL, //current disk and directory
&si, //main window look by default
&pi //here will be descriptors and identificators
//of new process and its primary descendant
))
{
_cputs("Create process failed.\n");
_cputs("Press any key to finish.\n");
_getch();
return GetLastError();
}
else _cputs("Process created succesfully.\n");
//close descriptors of new process
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
//close unnecessary descriptor of pipe
//read from anonymous pipe
for (int i = 0; i < 10; i++)
{
int nData;
DWORD dwBytesRead;
if (!ReadFile(hReadPipe, &nData, sizeof(nData), &dwBytesRead, NULL))
{
_cputs("Read from the pipe failed.\n");
_cputs("Press any key to finish.\n");
_getch();
return GetLastError();
}
_cprintf("The number %d is read from the pipe.\n", nData);
}
//close pipe descriptor
CloseHandle(hReadPipe);
_cputs("The process finished reading from the pipe.\n");
_cputs("Press any key to exit.\n");
_getch();
return 0;
}
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