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Annotation of 43BSDReno/lib/libc/net/getnetent.3, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)getnetent.3 6.5 (Berkeley) 6/23/90
        !            19: .\"
        !            20: .TH GETNETENT 3 "June 23, 1990"
        !            21: .UC 5
        !            22: .SH NAME
        !            23: getnetent, getnetbyaddr, getnetbyname, setnetent, endnetent \- get network entry
        !            24: .SH SYNOPSIS
        !            25: .nf
        !            26: .ft B
        !            27: #include <netdb.h>
        !            28: .PP
        !            29: .ft B
        !            30: struct netent *getnetent()
        !            31: .PP
        !            32: .ft B
        !            33: struct netent *getnetbyname(name)
        !            34: char *name;
        !            35: .PP
        !            36: .ft B
        !            37: struct netent *getnetbyaddr(net, type)
        !            38: long net;
        !            39: int type;
        !            40: .PP
        !            41: .ft B
        !            42: setnetent(stayopen)
        !            43: int stayopen;
        !            44: .PP
        !            45: .ft B
        !            46: endnetent()
        !            47: .fi
        !            48: .SH DESCRIPTION
        !            49: .IR Getnetent ,
        !            50: .IR getnetbyname ,
        !            51: and
        !            52: .I getnetbyaddr
        !            53: each return a pointer to an object with the
        !            54: following structure
        !            55: containing the broken-out
        !            56: fields of a line in the network data base,
        !            57: .IR /etc/networks .
        !            58: .RS
        !            59: .PP
        !            60: .nf
        !            61: struct netent {
        !            62:        char            *n_name;        /* official name of net */
        !            63:        char            **n_aliases;    /* alias list */
        !            64:        int             n_addrtype;     /* net number type */
        !            65:        unsigned long   n_net;          /* net number */
        !            66: };
        !            67: .ft R
        !            68: .ad
        !            69: .fi
        !            70: .RE
        !            71: .PP
        !            72: The members of this structure are:
        !            73: .TP \w'n_addrtype'u+2n
        !            74: n_name
        !            75: The official name of the network.
        !            76: .TP \w'n_addrtype'u+2n
        !            77: n_aliases
        !            78: A zero terminated list of alternate names for the network.
        !            79: .TP \w'n_addrtype'u+2n
        !            80: n_addrtype
        !            81: The type of the network number returned; currently only AF_INET.
        !            82: .TP \w'n_addrtype'u+2n
        !            83: n_net
        !            84: The network number.  Network numbers are returned in machine byte
        !            85: order.
        !            86: .PP
        !            87: .I Getnetent
        !            88: reads the next line of the file, opening the file if necessary.
        !            89: .PP
        !            90: .I Setnetent
        !            91: opens and rewinds the file.  If the
        !            92: .I stayopen
        !            93: flag is non-zero,
        !            94: the net data base will not be closed after each call to 
        !            95: .I getnetbyname
        !            96: or
        !            97: .IR getnetbyaddr .
        !            98: .PP
        !            99: .I Endnetent
        !           100: closes the file.
        !           101: .PP
        !           102: .I Getnetbyname
        !           103: and
        !           104: .I getnetbyaddr
        !           105: sequentially search from the beginning
        !           106: of the file until a matching
        !           107: net name or
        !           108: net address and type is found,
        !           109: or until EOF is encountered.
        !           110: Network numbers are supplied in host order.
        !           111: .SH FILES
        !           112: /etc/networks
        !           113: .SH "SEE ALSO"
        !           114: networks(5)
        !           115: .SH DIAGNOSTICS
        !           116: Null pointer
        !           117: (0) returned on EOF or error.
        !           118: .SH BUGS
        !           119: All information
        !           120: is contained in a static area
        !           121: so it must be copied if it is
        !           122: to be saved.  Only Internet network
        !           123: numbers are currently understood.
        !           124: Expecting network numbers to fit
        !           125: in no more than 32 bits is probably
        !           126: naive.

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