getserv.man

来自「eCos操作系统源码」· MAN 代码 · 共 49 行

NAME
       getservent, getservbyname, getservbyport - get service entry

SYNOPSIS
       #include <network.h>

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

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

DESCRIPTION
       The  getservbyname()  function returns a servent structure
       for the line from /etc/services that matches  the  service
       name using protocol proto.

       The  getservbyport()  function returns a servent structure
       for the line that matches the port port given  in  network
       byte order using protocol proto.

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

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

       The members of the servent structure are:

       s_name The official name of the service.

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

       s_port The  port  number  for the service given in network
              byte order.

       s_proto
              The name of the protocol to use with this  service.

RETURN VALUE
       The   getservbyname()  and  getservbyport()
       functions return the servent structure, or a NULL  pointer
       if an error occurs.