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RedHat 9 (Linux i386) - man page for getservent (redhat section 3)

GETSERVENT(3)			    Linux Programmer's Manual			    GETSERVENT(3)

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

SYNOPSIS
       #include <netdb.h>

       struct servent *getservent(void);

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

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

       void setservent(int stayopen);

       void endservent(void);

DESCRIPTION
       The  getservent()  function  reads the next line from the file /etc/services and returns a
       structure servent containing the broken out fields from the line.  The /etc/services  file
       is opened if necessary.

       The  getservbyname()  function returns a servent structure for the line from /etc/services
       that matches the service name using protocol proto. If proto is NULL, any protocol will be
       matched.

       The  getservbyport()  function  returns	a servent structure for the line that matches the
       port port given in network byte order using protocol proto. If proto is NULL, any protocol
       will be matched.

       The  setservent()  function opens and rewinds the /etc/services file.  If stayopen is true
       (1), then the file will not be closed between  calls  to  getservbyname()  and  getservby-
       port().

       The endservent() function closes /etc/services.

       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  getservent(), getservbyname() and getservbyport() functions return the servent struc-
       ture, or a NULL pointer if an error occurs or the end of the file is reached.

FILES
       /etc/services
	      services database file

CONFORMING TO
       BSD 4.3

SEE ALSO
       getprotoent(3), getnetent(3), services(5)

BSD					    2001-07-25				    GETSERVENT(3)


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