c pipes

pipes

int open_pipe(int *readpipe, int *writepipe)
{
    int fdpipe[2]; // read, write
#if defined(WIN32) || defined(_WIN32)
    int r = pipe( fdpipe, BUFFER_SIZE, O_BINARY );
#else
    int r = pipe(fdpipe);
#endif
    *readpipe = fdpipe[0];
    *writepipe = fdpipe[1];
    return r;
}


Use case:
            printf("CMD: %s\n", consumer_cmd);
            int rdpipe, wrpipe;
            open_pipe(&rdpipe, &wrpipe);
            
            // on windows must open in binary mode
            FILE *consumerpipe = popen(consumer_cmd, OPEN_MODE_STR);
            
            // send the pipe handle
            fwrite(&wrpipe, sizeof(int), 1, consumerpipe);
            
            // send it to the consumer
            fwrite(buf, 1, recvlen, consumerpipe);
            fflush(consumerpipe);
            pclose(consumerpipe);
            
            
Binary mode was only limitation I encoutnered.