VOLMGT_INUSE(3VOLMGT) Volume Management Library Functions

NAME

volmgt_inuse - check whether or not volume management is managing a
pathname

SYNOPSIS

cc [ flag... ] file... -lvolmgt [ library ... ]
#include <volmgt.h>

int volmgt_inuse(char *pathname);

DESCRIPTION

This function is obsolete. The management of removable media by the
Volume Management feature, including vold, has been replaced by
software that supports the Hardware Abstraction Layer (HAL).
Programmatic support for HAL is through the HAL APIs, which are
documented on the HAL web site. See hal(7). The return value of this
function is undefined.


volmgt_inuse() checks whether volume management is managing the
specified pathname.

RETURN VALUES

The return from this function is undefined.

ERRORS

This routine can fail, returning 0, if a stat(2) of the supplied
pathname or an open(2) of /dev/volctl fails, or if any of the
following is true:

ENXIO
Volume management is not running.


EINTR
An interrupt signal was detected while checking for the
supplied pathname for use.

EXAMPLES

Example 1: Using volmgt_inuse()

To see if volume management is managing the first floppy disk:


if (volmgt_inuse("/dev/rdiskette0") != 0) {
(void) printf("volmgt is managing diskette 0\n");
} else {
(void) printf("volmgt is NOT managing diskette 0\n");
}

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
|Interface Stability | Obsolete |
+--------------------+-----------------+

SEE ALSO

open(2), stat(2), errno(3C), volmgt_check(3VOLMGT),
volmgt_running(3VOLMGT), attributes(7), hal(7)

NOTES

This routine requires volume management to be running.


Since volmgt_inuse() returns 0 for two different cases (both when a
volume is not in use, and when an error occurs), it is up to the user
to to check errno to differentiate the two, and to ensure that volume
management is running.

March 8, 2007 VOLMGT_INUSE(3VOLMGT)