VOLMGT_RELEASE(3VOLMGT)VOLMGT_RELEASE(3VOLMGT)NAMEvolmgt_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This function is obsolete.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Volume Management feature, including vold, has been replaced by soft‐
ware 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(5). The return value of this function is unde‐
fined.
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 inter‐
nal 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(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│MT-Level │ MT-Safe │
├────────────────────┼─────────────────┤
│Interface Stability │ Obsolete │
└────────────────────┴─────────────────┘
SEE ALSOvolmgt_acquire(3VOLMGT), attributes(5), hal(5)
Mar 8, 2007 VOLMGT_RELEASE(3VOLMGT)
