source: branches/samba-3.5.x/testprogs/win32/npecho/npecho_server2.c

/*
 * Simple Named Pipe Client
 * (C) 2005 Jelmer Vernooij <jelmer@samba.org>
 * (C) 2009 Stefan Metzmacher <metze@samba.org>
 * Published to the public domain
 */

#include <windows.h>
#include <stdio.h>

#define ECHODATA "Black Dog"

int main(int argc, char *argv[])
{
        HANDLE h;
        DWORD numread = 0;
        char *outbuffer = malloc(sizeof(ECHODATA));
        BOOL msgmode = FALSE;
        DWORD type = 0;

        if (argc == 1) {
                goto usage;
        } else if (argc >= 3) {
                if (strcmp(argv[2], "byte") == 0) {
                        msgmode = FALSE;
                } else if (strcmp(argv[2], "message") == 0) {
                        msgmode = TRUE;
                } else {
                        goto usage;
                }
        }

        if (msgmode == TRUE) {
                printf("using message mode\n");
                type = PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT;
        } else {
                printf("using byte mode\n");
                type = PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT;
        }

        h = CreateNamedPipe(argv[1],
                            PIPE_ACCESS_DUPLEX,
                            type,
                            PIPE_UNLIMITED_INSTANCES,
                            1024,
                            1024,
                            0,
                            NULL);
        if (h == INVALID_HANDLE_VALUE) {
                printf("Error opening: %d\n", GetLastError());
                return -1;
        }

        ConnectNamedPipe(h, NULL);

        if (!WriteFile(h, ECHODATA, sizeof(ECHODATA), &numread, NULL)) {
                printf("Error writing: %d\n", GetLastError());
                return -1;
        }

        if (!WriteFile(h, ECHODATA, sizeof(ECHODATA), &numread, NULL)) {
                printf("Error writing: %d\n", GetLastError());
                return -1;
        }

        FlushFileBuffers(h);
        DisconnectNamedPipe(h);
        CloseHandle(h);

        return 0;
usage:
        printf("Usage: %s pipename [mode]\n", argv[0]);
        printf("  Where pipename is something like \\\\servername\\PIPE\\NPECHO\n");
        printf("  Where mode is 'byte' or 'message'\n");
        return -1;
}