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.\"
.IX Title "libinn_clientlib 3"
.TH libinn_clientlib 3 "2022-07-10" "INN 2.7.2" "InterNetNews Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
clientlib \- NNTP clientlib part of InterNetNews library
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    #include <inn/libinn.h>
\&
\&    extern FILE *ser_rd_fp;
\&    extern FILE *ser_wr_fp;
\&    extern char ser_line[];
\&
\&    extern char *getserverbyfile(char *file UNUSED);
\&    extern int server_init(char *host, int port);
\&    extern int handle_server_response(int response, char *host);
\&    extern void put_server(const char *text);
\&    extern int get_server(char *buff, int buffsize);
\&    extern void close_server(void);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The routines described in this manual page are part of the InterNetNews
library, \fBlibinn\fR\|(3).  They are replacements for the \fIclientlib\fR part of
the \s-1NNTP\s0 distribution, and are intended to be used in building news clients.
.PP
The \fBgetserverbyfile\fR function retrieves the value of the \fIserver\fR parameter
in \fIinn.conf\fR (or the value of the \f(CW\*(C`NNTPSERVER\*(C'\fR environment variable if set)
as the name of the local \s-1NNTP\s0 server.  It returns a pointer to static space.
The \fIfile\fR parameter is ignored (\fIinn.conf\fR is forced).
.PP
The \fBserver_init\fR function opens a connection to the \s-1NNTP\s0 server at
the specified \fIhost\fR, in reader mode.  It returns the server's response
code or \f(CW\*(C`\-1\*(C'\fR on error.  If a connection was made, then \fIser_rd_fp\fR and
\&\fIser_wr_fp\fR can be used to read from and write to the server, respectively,
and \fIser_line\fR will contain the server's response (though you should use
the more convenient \fBput_server\fR and \fBget_server\fR functions instead).
.PP
The \fBhandle_server_response\fR function decodes the \fIresponse\fR code,
which comes from the server on \fIhost\fR.  If the client is authorized,
it returns \f(CW0\fR.  A client that is only allowed to read is authorized,
but \fBhandle_server_response\fR will print a message on the standard output.
If the client is not authorized to talk to the server, then a message is
printed and the routine returns \f(CW\*(C`\-1\*(C'\fR.
.PP
The \fBput_server\fR function sends \fItext\fR to the server, adding the necessary
\&\s-1NNTP\s0 line terminators, and flushing the I/O buffer.
.PP
The \fBget_server\fR function reads a line of text from the server into \fIbuff\fR,
reading at most \fIbuffsize\fR characters.  Any trailing \f(CW\*(C`\er\en\*(C'\fR terminators
are stripped off.  \fBget_server\fR returns \f(CW\*(C`\-1\*(C'\fR on error, \f(CW0\fR on success.
.PP
The \fBclose_server\fR function sends a \f(CW\*(C`QUIT\*(C'\fR command to the server and
closes the connection.
.SH "HISTORY"
.IX Header "HISTORY"
Written by Rich \f(CW$alz\fR <rsalz@uunet.uu.net> for InterNetNews.  Rewritten into
\&\s-1POD\s0 by Julien Elie.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBlibinn\fR\|(3).