🚀 go-pugleaf

Only one copy is allowed per thread


Adam Carheden (carheden@holly.ColoState.EDU) wrote:
: I have a c question, which, like most c questions, probably lies in the
: misunderstanding of pointers:

: I declare the following:

: struct servent *udp_service;
: struct servent *tcp_service;

: Later, I call getservicebyname to fill them:

: udp_service = getservbyname("cs457", "udp");
: tcp_service = getservbyname("cs457", "tcp");

: Next, I print the results:

: printf("UDP Protocol = %s\nTCP Protocol = %s\n", udp_service->s_proto, 
: tcp_service->s_proto);

: This produces the following output:

: UDP Protocol = tcp
: TCP Protocol = tcp

: If I reverse the order of the getservbyname lines, I get the opposite:

: UDP Protocol = udp
: TCP Protocol = udp

: Both structures always point to the same thing.  Why?
: -- 
: Adam Carheden
: carheden@holly.ColoState.EDU