man/man3devinfo/di_devfs_path.3devinfo

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 DI_DEVFS_PATH 3DEVINFO "May 15, 2008"
 NAME
di_devfs_path, di_devfs_minor_path, di_path_devfs_path,
di_path_client_devfs_path, di_devfs_path_free - generate and free path names
 SYNOPSIS

cc [ flag... ] file... -ldevinfo [ library... ]
#include <libdevinfo.h>

char *di_devfs_path(di_node_t node);


char *di_devfs_minor_path(di_minor_t minor);


char *di_path_devfs_path(di_path_t path);


char *di_path_client_devfs_path(di_path_t path);


void di_devfs_path_free(char *path_buf);


 PARAMETERS
node

The handle to a device node in a di_init(3DEVINFO) snapshot.


minor

The handle to a device minor node in a snapshot.


path

The handle to a device path node in a snapshot.


path_buf

A pointer returned by di_devfs_path(), di_devfs_minor_path(),
di_path_devfs_path(), or di_path_client_devfs_path().


 DESCRIPTION

The di_devfs_path() function generates the physical path of the device
node specified by node.

The di_devfs_minor_path() function generates the physical path of the
device minor node specified by minor.

The di_path_devfs_path() function generates the pHCI physical path to the
device associated with the specified path node. The returned string is
identical to the di_devfs_path() for the device had the device not been
supported by multipath.

The di_path_client_devfs_path() function generates the vHCI physical path
of the multipath client device node associated with the device identity of the
specified path node. The returned string is identical to the
di_devfs_path() of the multipath client device node.

The di_devfs_path_free() function frees memory that was allocated to
store the path returned by di_devfs_path(), di_devfs_minor_path(),
di_path_devfs_path(), and di_path_client_devfs_path(). The caller
is responsible for freeing this memory by calling di_devfs_path_free().
 RETURN VALUES

Upon successful completion, the di_devfs_path(),
di_devfs_minor_path(), di_path_devfs_path(), and
di_path_client_devfs_path() functions return a pointer to the string
containing the path to a device node, a device minor node, or a device path
node, respectively. Otherwise, they return NULL and errno is set to
indicate the error. For a non-NULL return, the path will not have a
"/devices" prefix.
 ERRORS

The di_devfs_path(), di_devfs_minor_path(),
di_path_devfs_path(), and di_path_client_devfs_path() functions
will fail if:
EINVAL

The node, minor, or path argument is not a valid handle.


The di_devfs_path(), di_devfs_minor_path(),
di_path_devfs_path(), and di_path_client_devfs_path() functions can
also return any error value returned by malloc(3C).
 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:


ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Committed
MT-Level Safe


 SEE ALSO

di_init(3DEVINFO), libdevinfo(3LIB), malloc(3C),
attributes(5)

Writing Device Drivers