'\" te
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.TH SLPOPEN 3SLP "Jan 16, 2003"
.SH NAME
SLPOpen \- open an SLP handle
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lslp\fR [ \fIlibrary\fR... ]
#include <slp.h>

\fBSLPError\fR \fBSLPOpen\fR(\fBconst char *\fR\fIpcLang\fR, \fBSLPBoolean\fR \fIisAsync\fR, \fBSLPHandle *\fR\fIphSLP\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBSLPOpen()\fR function returns a \fBSLPHandle\fR handle in the
\fIphSLP\fR parameter  for  the  language   locale  passed   in  as   the
\fIpcLang\fR  parameter.  The client indicates if operations on  the  handle
are  to be synchronous or asynchronous  through  the \fIisAsync\fR  parameter.
The  handle encapsulates  the  language locale  for \fBSLP\fR requests  issued
through  the  handle,  and  any  other  resources  required  by  the
implementation.  \fBSLP\fR properties  are not  encapsulated by the handle,
they  are global.  The return value  of  the  function  is  an  \fBSLPError\fR
code  indicating  the  status of  the  operation.  Upon  failure,  the
\fIphSLP\fR parameter is \fINULL\fR.
.sp
.LP
An \fBSLPHandle\fR can only be used for one \fBSLP\fR \fBAPI\fR operation at a
time. If the original operation was started asynchronously, any attempt to
start an additional operation on the handle while the original operation is
pending results in the return of an \fBSLP_HANDLE_IN_USE\fR error from the
\fBAPI\fR function.  The \fBSLPClose()\fR  function terminates any outstanding
calls on the handle.
.SH PARAMETERS
.sp
.ne 2
.na
\fB\fIpcLang\fR\fR
.ad
.RS 11n
A pointer  to an  array of  characters containing  the  language tag set forth
in \fIRFC 1766\fR for the natural language  locale of requests issued on the
handle.  This parameter cannot be \fINULL\fR.
.RE

.sp
.ne 2
.na
\fB\fIisAsync\fR\fR
.ad
.RS 11n
An \fBSLPBoolean\fR indicating whether or not the \fBSLPHandle\fR should be
opened for an asynchronous operation.
.RE

.sp
.ne 2
.na
\fB\fIphSLP\fR\fR
.ad
.RS 11n
A pointer to an \fBSLPHandle\fR in which the open \fBSLPHandle\fR is returned.
If an error occurs, the value upon return is \fINULL\fR.
.RE

.SH ERRORS
.sp
.LP
This function or its callback may return any \fBSLP\fR error code. See the
ERRORS section in \fBslp_api\fR(3SLP).
.SH EXAMPLES
.LP
\fBExample 1 \fRUsing \fBSLPOpen()\fR
.sp
.LP
Use the following example to open a synchronous handle for the German ("de")
locale:

.sp
.in +2
.nf
SLPHandle HSLP; SLPError err;  err = SLPOpen("de", SLP_FALSE, &hSLP)
.fi
.in -2

.SH ENVIRONMENT VARIABLES
.sp
.ne 2
.na
\fB\fBSLP_CONF_FILE\fR\fR
.ad
.RS 17n
When set, use this file for configuration.
.RE

.SH SEE ALSO
.sp
.LP
.BR slp_api (3SLP),
.BR slp.conf (5),
.BR slpd.reg (5),
.BR attributes (7),
.BR slpd (8)
.sp
.LP
\fISystem Administration Guide: Network Services\fR
.sp
.LP
Alvestrand, H. \fIRFC 1766, Tags for the Identification of Languages\fR.
Network Working Group. March 1995.
.sp
.LP
Kempf, J. and Guttman, E. \fIRFC 2614, An API for Service Location\fR. The
Internet Society. June 1999.