Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
GETPROTOENT(3)		   Linux Programmer's Manual		GETPROTOENT(3)

NAME
       getprotoent, getprotobyname, getprotobynumber, setprotoent, endprotoent
       - get protocol entry

SYNOPSIS
       #include	<netdb.h>

       struct protoent *getprotoent(void);

       struct protoent *getprotobyname(const char *name);

       struct protoent *getprotobynumber(int proto);

       void setprotoent(int stayopen);

       void endprotoent(void);

DESCRIPTION
       The getprotoent() function reads	the  next  entry  from	the  protocols
       database	(see protocols(5)) and returns a protoent structure containing
       the broken-out fields from the entry.  A	connection is  opened  to  the
       database	if necessary.

       The  getprotobyname() function returns a	protoent structure for the en-
       try from	the database that matches the protocol name name.   A  connec-
       tion is opened to the database if necessary.

       The  getprotobynumber()	function  returns a protoent structure for the
       entry from the database that matches the	 protocol  number  number.   A
       connection is opened to the database if necessary.

       The setprotoent() function opens	a connection to	the database, and sets
       the next	entry to the first entry.  If stayopen is  nonzero,  then  the
       connection  to  the database will not be	closed between calls to	one of
       the getproto*() functions.

       The endprotoent() function closes the connection	to the database.

       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	NULL-terminated	list of	alternative names for the protocol.

       p_proto
	      The protocol number.

RETURN VALUE
       The getprotoent(), getprotobyname()  and	 getprotobynumber()  functions
       return  a  pointer  to  a statically allocated protoent structure, or a
       null pointer if an error	occurs or the end of the file is reached.

FILES
       /etc/protocols
	      protocol database	file

CONFORMING TO
       4.3BSD, POSIX.1-2001.

SEE ALSO
       getnetent(3), getprotoent_r(3), getservent(3), protocols(5)

COLOPHON
       This page is part of release 3.74 of the	Linux  man-pages  project.   A
       description  of	the project, information about reporting bugs, and the
       latest	 version    of	  this	  page,	   can	   be	  found	    at
       http://www.kernel.org/doc/man-pages/.

GNU				  2008-08-19			GETPROTOENT(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | FILES | CONFORMING TO | SEE ALSO | COLOPHON

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=getprotoent&sektion=3&manpath=Debian+8.1.0>

home | help