Attention Rexec() users!!!

[John Stephen Junkins]

    Hey there!   I have been trying to write an incredibly simple code using
rexec to fire off another process.  However the little code below core
dumps.  Dbx says that it is bombing in a call to getservbyname() which I
assume means that I have a problem with the way I have defined hostname[][].
Can anyone please tell me what I am doing wrong or send me a piece of 
code which uses rexec() and works()?   

   Please send solutions directly to me as this newsgroup is too big!  Thanks
in advance!!

   Stephen.

main()
{
   char hostname [2][50];
   struct servent *s;

   int fd2p = 0;

   gethostname (hostname[0], 50);
   sprintf (hostname[1], "%s", "");

   s = getservbyname ("exec", "tcp");

   rexec (hostname, s->s_port, "jsj", "xxxxxxxx", "xlock", &fd2p);

   printf ("Mission accomplished!");
}


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!! whoami:          J. Stephen. Junkins                             !!
!! whereami:        jsj at emu.lanl.gov                                !!
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