getservent(3n)             DG/UX 4.30              getservent(3n)



     NAME
          getservent, getservbyport, getservbyname, setservent,
          endservent - get service entry

     SYNOPSIS
          #include <netdb.h>

          struct servent *getservent()

          struct servent *getservbyname(name, proto)
          char *name, *proto;

          struct servent *getservbyport(port, proto)
          int port; char *proto;

          setservent(stayopen)
          int stayopen

          endservent()

     DESCRIPTION
          Getservent, getservbyname, and getservbyport each return a
          pointer to an object with the following structure containing
          the broken-out fields of a line in the network services data
          base, /etc/services.

          struct    servent {
               char *s_name;  /* official name of service */
               char **s_aliases;   /* alias list */
               int  s_port;        /* port service resides at */
               char *s_proto; /* protocol to use */
          };

          The members of this structure are:

          s_name     The official name of the service.

          s_aliases  A zero terminated list of alternate names for the
                     service.

          s_port     The port number at which the service resides.
                     Port numbers are returned in network byte order.

          s_proto    The name of the protocol to use when contacting
                     the service.

          Getservent reads the next line of the file, opening the file
          if necessary.

          Setservent opens and rewinds the file.  If the stayopen flag
          is non-zero, the net data base will not be closed after each
          call to getservbyname or getservbyport.



     Licensed material--property of copyright holder(s)         Page 1

     getservent(3n)             DG/UX 4.30              getservent(3n)



          Endservent closes the file.

          Getservbyname and getservbyport sequentially search from the
          beginning of the file until a matching protocol name or port
          number is found, or until EOF is encountered.  If a protocol
          name is also supplied (non-NULL), searches must also match
          the protocol.

     FILES
          /etc/services

     SEE ALSO
          getprotoent(3N), services(5), ypserv(8)

     DIAGNOSTICS
          Null pointer (0) returned on EOF or error.

     BUGS
          All information is contained in a static area so it must be
          copied if it is to be saved.  Expecting port numbers to fit
          in a 32 bit quantity is probably naive.


































     Licensed material--property of copyright holder(s)         Page 2