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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "ENDNETENT" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" endnetent 
+.SH NAME
+endnetent, getnetbyaddr, getnetbyname, getnetent, setnetent \- network
+database functions
+.SH SYNOPSIS
+.LP
+\fB#include <netdb.h>
+.br
+.sp
+void endnetent(void);
+.br
+struct netent *getnetbyaddr(uint32_t\fP \fInet\fP\fB, int\fP \fItype\fP\fB);
+.br
+struct netent *getnetbyname(const char *\fP\fIname\fP\fB);
+.br
+struct netent *getnetent(void);
+.br
+void setnetent(int\fP \fIstayopen\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+These functions shall retrieve information about networks. This information
+is considered to be stored in a database that can be
+accessed sequentially or randomly. The implementation of this database
+is unspecified.
+.LP
+The \fIsetnetent\fP() function shall open and rewind the database.
+If the \fIstayopen\fP argument is non-zero, the connection
+to the \fInet\fP database shall not be closed after each call to \fIgetnetent\fP()
+(either directly, or indirectly through one of
+the other \fIgetnet*\fP() functions), and the implementation may maintain
+an open file
+descriptor to the database.
+.LP
+The \fIgetnetent\fP() function shall read the next entry of the database,
+opening and closing a connection to the database as
+necessary.
+.LP
+The \fIgetnetbyaddr\fP() function shall search the database from the
+beginning, and find the first entry for which the address
+family specified by \fItype\fP matches the \fIn_addrtype\fP member
+and the network number \fInet\fP matches the \fIn_net\fP
+member, opening and closing a connection to the database as necessary.
+The \fInet\fP argument shall be the network number in host
+byte order.
+.LP
+The \fIgetnetbyname\fP() function shall search the database from the
+beginning and find the first entry for which the network
+name specified by \fIname\fP matches the \fIn_name\fP member, opening
+and closing a connection to the database as necessary.
+.LP
+The \fIgetnetbyaddr\fP(), \fIgetnetbyname\fP(), and \fIgetnetent\fP()
+functions shall each return a pointer to a
+\fBnetent\fP structure, the members of which shall contain the fields
+of an entry in the network database.
+.LP
+The \fIendnetent\fP() function shall close the database, releasing
+any open file descriptor.
+.LP
+These functions need not be reentrant. A function that is not required
+to be reentrant is not required to be thread-safe.
+.SH RETURN VALUE
+.LP
+Upon successful completion, \fIgetnetbyaddr\fP(), \fIgetnetbyname\fP(),
+and \fIgetnetent\fP() shall return a pointer to a
+\fBnetent\fP structure if the requested entry was found, and a null
+pointer if the end of the database was reached or the
+requested entry was not found. Otherwise, a null pointer shall be
+returned.
+.SH ERRORS
+.LP
+No errors are defined.
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+The \fIgetnetbyaddr\fP(), \fIgetnetbyname\fP(), and \fIgetnetent\fP()
+functions may return pointers to static data, which may
+be overwritten by subsequent calls to any of these functions.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+The Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<netdb.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .