Hello once more dear internet,

I writing a small program that among other things, writes a log file of commands received.
to do that, I want to use a thread that all it should do is just attempt to read from a pipe, while the main thread will write into that pipe whenever it should.
Since i don't know the length of each string command, i thought about writing and reading the pointer to the char buf[MAX_MESSAGE_LEN].
Since what i've tried so far doesn't work, i'll post my best effort :P

   char str[] = "hello log thread 123456789 10 11 12 13 14 15 16 17 18 19\n";  
    if (pipe(pipe_fd) != 0) return -1;  
    pthread_t log_thread;  
    pthread_create(&log_thread,NULL, log_thread_start, argv[2]);  
    success_write = 0;  
    do {  
        write(pipe_fd[1],(void*)&str,sizeof(char*));  
    } while (success_write < sizeof(char*));

and the thread does this:

   char buffer[MAX_MSGLEN];  
    int success_read;  
    success_read = 0;  
    //while(1) {  
        do {  
            success_read += read(pipe_fd[0],(void*)&buffer, sizeof(char*));  
        } while (success_read < sizeof(char*));  
    //}  
    printf("%s",buffer); 

(Sorry if this doesn't indent, i can't seem to figure out this editor...) oh, and pipe_fd[2] is a global parameter.

So, any help with this, either by the way i thought of, or another way i could read strings without knowing the length, would be much appreciated.

On a side note, i'm working on Eclipse IDE C/C++, version 1.2.1 and i can't seem to set up the compiler so it will link the pthread library to my project. I've resorted to writing my own Makefile to make it (pun intended :P) work. Anyone knows what to do ? i've looked online, but all i find are solutions that are probably good on an older version because the tabs and option keys are different.

Anyways, Thanks a bunch internet ! Yonatan