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<!-- Copyright (C) 2003 Red Hat, Inc.                                --><!-- This material may be distributed only subject to the terms      --><!-- and conditions set forth in the Open Publication License, v1.0  --><!-- or later (the latest version is presently available at          --><!-- http://www.opencontent.org/openpub/).                           --><!-- Distribution of the work or derivative of the work in any       --><!-- standard (paper) book form is prohibited unless prior           --><!-- permission is obtained from the copyright holder.               --><HTML><HEAD><TITLE>getnetent</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos Reference Manual"HREF="ecos-ref.html"><LINKREL="UP"TITLE="TCP/IP Library Reference"HREF="tcpip-library-reference.html"><LINKREL="PREVIOUS"TITLE="getnameinfo"HREF="net-common-tcpip-manpages-getnameinfo.html"><LINKREL="NEXT"TITLE="getprotoent"HREF="net-common-tcpip-manpages-getprotoent.html"></HEAD><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">eCos Reference Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="net-common-tcpip-manpages-getnameinfo.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 38. TCP/IP Library Reference</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="net-common-tcpip-manpages-getprotoent.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="NET-COMMON-TCPIP-MANPAGES-GETNETENT">getnetent</H1><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">GETNETENT(3)            System Library Functions Manual           GETNETENT(3)NAME     getnetent, getnetbyaddr, getnetbyname, setnetent, endnetent - get network     entrySYNOPSIS     #include &lt;netdb.h&#62;     struct netent *     getnetent(void);     struct netent *     getnetbyname(char *name);     struct netent *     getnetbyaddr(in_addr_t net, int type);     void     setnetent(int stayopen);     void     endnetent(void);DESCRIPTION     The getnetent(), getnetbyname(), and getnetbyaddr() functions each return     a pointer to an object with the following structure containing the bro-     ken-out fields of a line in the network database, /etc/networks.           struct  netent {                   char            *n_name;        /* official name of net */                   char            **n_aliases;    /* alias list */                   int             n_addrtype;     /* net number type */                   in_addr_t       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.     The getnetent() function reads the next line of the file, opening the     file if necessary.     The setnetent() function opens and rewinds the file.  If the stayopen     flag is non-zero, the net database will not be closed after each call to     getnetbyname() or getnetbyaddr().     The endnetent() function closes the file.     The getnetbyname() and getnetbyaddr() functions search the domain name     server if the system is configured to use one.  If the search fails, or     no name server is configured, they 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/networksDIAGNOSTICS     Null pointer (0) returned on EOF or error.SEE ALSO     resolver(3), networks(5)HISTORY     The getnetent(), getnetbyaddr(), getnetbyname(), setnetent(), and     endnetent() functions appeared in 4.2BSD.BUGS     The data space used by these functions is static; if future use requires     the data, it should be copied before any subsequent calls to these func-     tions overwrite it.  Only Internet network numbers are currently under-     stood.  Expecting network numbers to fit in no more than 32 bits is     naive.BSD                             March 13, 1997                             BSD    </PRE></TD></TR></TABLE></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="net-common-tcpip-manpages-getnameinfo.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-ref.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="net-common-tcpip-manpages-getprotoent.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">getnameinfo</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="tcpip-library-reference.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">getprotoent</TD></TR></TABLE></DIV></BODY></HTML>
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