'\" te
.\" Copyright (c) 2009, Sun Microsystems, Inc.  All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
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.TH di_walk_minor 3DEVINFO "14 Jan 2009" "SunOS 5.11" "Device Information Library Functions"
.SH NAME
di_walk_minor \- traverse libdevinfo minor nodes
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR... ] \fIfile\fR... \fB-ldevinfo\fR [ \fIlibrary\fR... ]
#include <libdevinfo.h>

\fBint\fR \fBdi_walk_minor\fR(\fBdi_node_t\fR \fIroot\fR, \fBconst char *\fR\fIminor_nodetype\fR,
     \fBuint_t\fR \fIflag\fR, \fBvoid *\fR\fIarg\fR, \fBint\fR (\fI*minor_callback\fR)(di_node_t \fInode\fR,
     di_minor_t \fIminor\fR, void *\fIarg\fR));
.fi

.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIarg\fR\fR
.ad
.RS 18n
.rt  
Pointer to caller- specific user data.
.RE

.sp
.ne 2
.mk
.na
\fB\fIflag\fR\fR
.ad
.RS 18n
.rt  
Specify 0. Reserved for future use.
.RE

.sp
.ne 2
.mk
.na
\fB\fIminor\fR\fR
.ad
.RS 18n
.rt  
The minor node visited.
.RE

.sp
.ne 2
.mk
.na
\fB\fIminor_nodetype\fR\fR
.ad
.RS 18n
.rt  
A character string specifying the minor data type, which may be one of the
types defined by the Solaris DDI framework, for example, \fBDDI_NT_BLOCK\fR.
\fBNULL\fR matches all \fIminor_node\fR  types. See
\fBddi_create_minor_node\fR(9F).
.RE

.sp
.ne 2
.mk
.na
\fB\fInode\fR\fR
.ad
.RS 18n
.rt  
The device node with which to  the minor node is associated.
.RE

.sp
.ne 2
.mk
.na
\fB\fIroot\fR\fR
.ad
.RS 18n
.rt  
Root of subtree to visit.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBdi_walk_minor()\fR function visits all minor nodes attached to device
nodes in a subtree rooted at \fIroot\fR. For each  minor node that matches
\fIminor_nodetype\fR, the caller-supplied function \fIminor_callback\fR() is
invoked. The walk terminates immediately when \fIminor_callback\fR() returns
\fBDI_WALK_TERMINATE\fR.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fBdi_walk_minor()\fR returns 0. Otherwise, -1 is
returned and errno is set to indicate the error.
.sp
.LP
The \fBminor_callback()\fR function returns one of the following:
.sp
.ne 2
.mk
.na
\fB\fBDI_WALK_CONTINUE\fR\fR
.ad
.RS 21n
.rt  
Continue to visit subsequent minor data nodes.
.RE

.sp
.ne 2
.mk
.na
\fB\fBDI_WALK_TERMINATE\fR\fR
.ad
.RS 21n
.rt  
Terminate the walk immediately.
.RE

.SH ERRORS
.sp
.LP
The \fBdi_walk_minor()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
.rt  
Invalid argument.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelSafe
.TE

.SH SEE ALSO
.sp
.LP
\fBdladm\fR(1M), \fBdi_minor_nodetype\fR(3DEVINFO), dlpi_walk(3DLPI),
\fBlibdevinfo\fR(3LIB), \fBattributes\fR(5), \fBfilesystem\fR(5),
\fBddi_create_minor_node\fR(9F)
.sp
.LP
\fIWriting Device Drivers\fR
.SH NOTES
.sp
.LP
The \fBdi_walk_minor()\fR function is no longer an accurate method for walking
network datalink interfaces on the system. Applications should use
\fBdlpi_walk\fR(3DLPI) instead. It has been common for applications to use
\fBdi_walk_minor()\fR to walk networking devices by passing in a
\fBminor_nodetype\fR of \fBDDI_NT_NET\fR, in most cases to discover the set of
DLPI devices on the system. Solaris now makes a layering distinction between
networking devices (the objects displayed in the \fBDEVICE\fR field by
\fBdladm\fR \fBshow-phys\fR) and network datalink interfaces (the objects
displayed by \fBdladm\fR \fBshow-link\fR). Datalink interfaces are represented
as the set of DLPI device nodes that applications can open by using
\fBdlpi_open\fR(3DLPI) or by opening DLPI nodes out of the \fB/dev/net\fR
filesystem (see \fBfilesystem\fR(5)). The \fBdlpi_walk\fR(3DLPI) function is
the proper function to walk these nodes.