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man pages section 3: Extended Library Functions, Volume 4

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Updated: Thursday, June 13, 2019
 
 

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This function is obsolete. The management of removable media by the Volume Management feature, including vold, has been replaced by software that supports the Hardware Abstraction Layer (HAL).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.

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.