NAME
       getprotobyname,  getprotobynumber - get protocol entry

SYNOPSIS
       #include <network.h>

       struct protoent *getprotobyname(const char *name);

       struct protoent *getprotobynumber(int proto);

DESCRIPTION
       The getprotobyname() function returns a protoent structure
       for the line from /etc/protocols that matches the protocol
       name name.

       The  getprotobynumber() function returns a protoent struc­
       ture for the line that matches the protocol number number.

       The protoent structure is defined in <netdb.h> as follows:

              struct protoent {
                      char    *p_name;        /* official protocol name */
                      char    **p_aliases;    /* alias list */
                      int     p_proto;        /* protocol number */
              }

       The members of the protoent structure are:

       p_name The official name of the protocol.

       p_aliases
              A zero terminated list of alternative names for the
              protocol.
       p_proto
              The protocol number.

RETURN VALUE
       The getprotobyname() and getprotobynumber()
       functions return the protoent structure, or a NULL pointer
       if an error occurs.


