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Annotation of 43BSDReno/lib/libc/net/getservent.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: .\"    @(#)getservent.3        6.5 (Berkeley) 6/23/90
        !            19: .\"
        !            20: .TH GETSERVENT 3 "June 23, 1990"
        !            21: .UC 5
        !            22: .SH NAME
        !            23: getservent, getservbyport, getservbyname, setservent,
        !            24: endservent \- get service entry
        !            25: .SH SYNOPSIS
        !            26: .nf
        !            27: .ft B
        !            28: #include <netdb.h>
        !            29: .PP
        !            30: .ft B
        !            31: struct servent *getservent()
        !            32: .PP
        !            33: .ft B
        !            34: struct servent *getservbyname(name, proto)
        !            35: char *name, *proto;
        !            36: .PP
        !            37: .ft B
        !            38: struct servent *getservbyport(port, proto)
        !            39: int port; char *proto;
        !            40: .PP
        !            41: .ft B
        !            42: setservent(stayopen)
        !            43: int stayopen
        !            44: .PP
        !            45: .ft B
        !            46: endservent()
        !            47: .fi
        !            48: .SH DESCRIPTION
        !            49: .IR Getservent ,
        !            50: .IR getservbyname ,
        !            51: and
        !            52: .I getservbyport
        !            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 services data base,
        !            57: .IR /etc/services .
        !            58: .RS
        !            59: .PP
        !            60: .nf
        !            61: struct servent {
        !            62:        char    *s_name;        /* official name of service */
        !            63:        char    **s_aliases;    /* alias list */
        !            64:        int     s_port;         /* port service resides at */
        !            65:        char    *s_proto;       /* protocol to use */
        !            66: };
        !            67: .ft R
        !            68: .ad
        !            69: .fi
        !            70: .RE
        !            71: .PP
        !            72: The members of this structure are:
        !            73: .TP \w's_aliases'u+2n
        !            74: s_name
        !            75: The official name of the service.
        !            76: .TP \w's_aliases'u+2n
        !            77: s_aliases
        !            78: A zero terminated list of alternate names for the service.
        !            79: .TP \w's_aliases'u+2n
        !            80: s_port
        !            81: The port number at which the service resides.
        !            82: Port numbers are returned in network byte order.
        !            83: .TP \w's_aliases'u+2n
        !            84: s_proto
        !            85: The name of the protocol to use when contacting the
        !            86: service.
        !            87: .PP
        !            88: .I Getservent
        !            89: reads the next line of the file, opening the file if necessary.
        !            90: .PP
        !            91: .I Setservent
        !            92: opens and rewinds the file.  If the
        !            93: .I stayopen
        !            94: flag is non-zero,
        !            95: the net data base will not be closed after each call to 
        !            96: .I getservbyname
        !            97: or .IR getservbyport .
        !            98: .PP
        !            99: .I Endservent
        !           100: closes the file.
        !           101: .PP
        !           102: .I Getservbyname
        !           103: and
        !           104: .I getservbyport
        !           105: sequentially search from the beginning
        !           106: of the file until a matching
        !           107: protocol name or
        !           108: port number is found,
        !           109: or until EOF is encountered.
        !           110: If a protocol name is also supplied (non-NULL),
        !           111: searches must also match the protocol.
        !           112: .SH FILES
        !           113: /etc/services
        !           114: .SH "SEE ALSO"
        !           115: getprotoent(3), services(5)
        !           116: .SH DIAGNOSTICS
        !           117: Null pointer
        !           118: (0) returned on EOF or error.
        !           119: .SH BUGS
        !           120: All information
        !           121: is contained in a static area
        !           122: so it must be copied if it is
        !           123: to be saved.  Expecting port
        !           124: numbers to fit in a 32 bit
        !           125: quantity is probably naive.

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