VOLMGT_RELEASE(3VOLMGT) Volume Management Library Functions

NAME

volmgt_release - release removable media device reservation

SYNOPSIS

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


int volmgt_release(char *dev);

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This function is obsolete.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Volume Management feature, including vold, has been replaced by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


The volmgt_release() routine releases the removable media device
reservation specified as dev. See volmgt_acquire(3VOLMGT) for a
description of dev.


If dev is reserved by the caller, volmgt_release() updates the
internal device reservation database to indicate that the device is
no longer reserved. If the requested device is reserved by another
process, the release attempt fails and errno is set to 0.

RETURN VALUES

The return from this function is undefined.

ERRORS

On failure, volmgt_release() returns 0, and sets errno for one of
the following conditions:

EINVAL
dev was invalid or missing.


EBUSY
dev was not reserved by the caller.

EXAMPLES

Example 1: Using volmgt_release()

In the following example, volume management is running, and the first
floppy drive is reserved, accessed and released.


#include <volmgt.h>
char *errp;
if (!volmgt_acquire("floppy0", "FileMgr", 0, &errp,
NULL)) {
/* handle error case */
...
}
/* floppy acquired - now access it */
if (!volmgt_release("floppy0")) {
/* handle error case */
...
}

ATTRIBUTES

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


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

SEE ALSO

volmgt_acquire(3VOLMGT), attributes(7), hal(7)

March 8, 2007 VOLMGT_RELEASE(3VOLMGT)