VOLMGT_INUSE(3VOLMGT) Volume Management Library Functions VOLMGT_INUSE(3VOLMGT)

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This function is obsolete.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Volume Management feature, including vold, has been replaced by software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)