getnetbyaddr(3n) [ultrix man page]

getnetent(3n)															     getnetent(3n)

Name
       getnetent, getnetbyaddr, getnetbyname, setnetent, endnetent - get networks entry

Syntax
       #include <netdb.h>

       struct netent *getnetent()

       struct netent *getnetbyname(name)
       char *name;

       struct netent *getnetbyaddr(net, type)
       long net; int type;

       void setnetent(stayopen)
       int stayopen;

       void endnetent()

Description
       The and subroutines each return a pointer to an object with the following structure containing the broken-out fields of a line in the data-
       base.
       struct	 netent {
	    char *n_name;  /* official name of net */
	    char **n_aliases;	/* alias list */
	    int  n_addrtype;	/* net number type */
	    long n_net; 	/* net number */
       };

       The members of this structure are:

       n_name	   The official name of the network.

       n_aliases   A zero terminated list of alternate names for the network.

       n_addrtype  The type of the network number returned: AF_INET.

       n_net	   The network number.	Network numbers are returned in machine byte order.

       If the stayopen flag on a subroutine is NULL, the database is opened.  Otherwise the has the effect of rewinding the database.  The may	be
       called to close the database when processing is complete.

       The subroutine simply reads the next line while and search until a matching name or net number is found (or until EOF is encountered).  The
       type must be AF_INET.  The subroutine keeps a pointer in the database, allowing successive calls to be used to search the entire file.

       A call to must be made before a loop using in order to perform initialization and an must be used after the loop.  Both and make  calls	to
       and

Restrictions
       All  information  is  contained	in  a  static area so it must be copied if it is to be saved.  Only Internet network numbers are currently
       understood.

       If YP is running, does not return the entries in any particular order.  See the Guide to the Yellow Pages Service for setup information.

       The networks database may also be distributed via the BIND/Hesiod naming service.  See the Guide to the BIND/Hesiod Service for more infor-
       mation.

Return Values
       Null pointer(0) returned on EOF or error.

Files
See Also
       networks(5), svc.conf(5)
       Guide to the BIND/Hesiod Service
       Guide to the Yellow Pages Service

																     getnetent(3n)

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GETNETENT(3N)															     GETNETENT(3N)

NAME

       getnetent, getnetbyaddr, getnetbyname, setnetent, endnetent - get network entry

SYNOPSIS

       #include <netdb.h>

       struct netent *getnetent()

       struct netent *getnetbyname(name)
       char *name;

       struct netent *getnetbyaddr(net, type)
       long net;
       int type;

       setnetent(stayopen)
       int stayopen;

       endnetent()

DESCRIPTION

       Getnetent,  getnetbyname, and getnetbyaddr each return a pointer to an object with the following structure containing the broken-out fields
       of a line in the network data base, /etc/networks.

	      struct	netent {
		   char      *n_name;  /* official name of net */
		   char      **n_aliases;   /* alias list */
		   int	     n_addrtype;    /* net number type */
		   unsigned long  n_net;	 /* net number */
	      };

       The members of this structure are:

       n_name	   The official name of the network.

       n_aliases   A zero terminated list of alternate names for the network.

       n_addrtype  The type of the network number returned; currently only AF_INET.

       n_net	   The network number.	Network numbers are returned in machine byte order.

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

       Setnetent opens and rewinds the file.  If the stayopen flag is non-zero, the net data base will not be closed after each call to  getnetby-
       name or getnetbyaddr.

       Endnetent closes the file.

       Getnetbyname  and  getnetbyaddr	sequentially  search  from  the beginning of the file until a matching net name or net address and type is
       found, or until EOF is encountered.  Network numbers are supplied in host order.

FILES

       /etc/networks

SEE ALSO

       networks(5)

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.   Only	Internet  network  numbers  are  currently
       understood.  Expecting network numbers to fit in no more than 32 bits is probably naive.

4.2 Berkeley Distribution					   May 19, 1986 						     GETNETENT(3N)

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getnetbyaddr(3n) [ultrix man page]

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