'\" te
.\"  Copyright (c) 2003, Sun Microsystems, Inc.,  All Rights Reserved
.TH ldi_get_dev 9F "3 June 2003" "SunOS 5.11" "Kernel Functions for Drivers"
.SH NAME
ldi_get_dev, ldi_get_otyp, ldi_get_devid, ldi_get_minor_name \- Extract information from a layered handle 
.SH SYNOPSIS
.LP
.nf
#include <sys/sunldi.h> 

\fBint\fR \fBldi_get_dev\fR(\fBldi_handle_t lh\fR, \fBdev_t *\fR\fIdevp\fR);
.fi

.LP
.nf
\fBint\fR \fBldi_get_otyp\fR(\fBldi_handle_t lh\fR, \fBint *\fR\fIotyp\fR);
.fi

.LP
.nf
\fBint\fR \fBldi_get_devid\fR(\fBldi_handle_t lh\fR, \fBddi_devid_t *\fR\fIdevid\fR);
.fi

.LP
.nf
\fBint\fR \fBldi_get_minor_name\fR(\fBldi_handle_t lh\fR, \fBchar **\fR\fIminor_name\fR);
.fi

.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIlh\fR \fR
.ad
.RS 15n
.rt  
Layered handle
.RE

.sp
.ne 2
.mk
.na
\fB\fIotyp\fR \fR
.ad
.RS 15n
.rt  
Indicates on which interface the driver was opened. Valid settings are:
.sp
.ne 2
.mk
.na
\fBOTYP_BLK\fR
.ad
.RS 12n
.rt  
Open device block interface.
.RE

.sp
.ne 2
.mk
.na
\fBOTYP_CHR\fR
.ad
.RS 12n
.rt  
Open device character interface.
.RE

.RE

.sp
.ne 2
.mk
.na
\fB\fIdevp\fR \fR
.ad
.RS 15n
.rt  
Pointer to a device number.
.RE

.sp
.ne 2
.mk
.na
\fB\fIdevid\fR \fR
.ad
.RS 15n
.rt  
Device ID.
.RE

.sp
.ne 2
.mk
.na
\fB\fIminor_name\fR \fR
.ad
.RS 15n
.rt  
Minor device node name.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBldi_get_dev()\fR function retrieves the \fBdev_t\fR associated with a layered handle.
.sp
.LP
The \fBldi_get_otyp()\fR retrieves the open flag that was used to open the device associated with the layered handle.
.sp
.LP
The \fBldi_get_devid()\fR function retrieves a \fIdevid\fR for the device associated with the layered handle. The caller  should use \fBddi_devid_free()\fR to free the devid when done with it. 
.sp
.LP
The \fBldi_get_minor_name()\fR function retrieves the name of the minor node opened for the device associated with the layered handle. \fBldi_get_minor_name()\fR allocates a buffer containing the minor node name and returns it via the \fIminor_name\fR parameter. The caller should use \fBkmem_free()\fR to release the buffer when done with it.
.SH RETURN VALUES
.sp
.LP
The \fBldi_get_dev()\fR, \fBldi_get_otyp()\fR, \fBldi_get_devid()\fR, and \fBldi_get_devid()\fR functions return \fB0\fR upon success.
.sp
.LP
In case of an error, the following values may be returned:
.sp
.ne 2
.mk
.na
\fBEINVAL\fR
.ad
.RS 11n
.rt  
Invalid input parameters.
.RE

.sp
.ne 2
.mk
.na
\fBENOTSUP\fR
.ad
.RS 11n
.rt  
The operation is not supported for this device.
.RE

.SH CONTEXT
.sp
.LP
These functions may be called from user or kernel context.