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man pages section 3: Extended Library Functions, Volume 4

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Updated: Thursday, June 13, 2019
 
 

volmgt_running(3VOLMGT)

Name

volmgt_running - return whether or not volume management is running

Synopsis

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

int volmgt_running(void);

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This function is obsolete. The management of removable media by the Volume Management feature, including vold, has been replaced by software that supports the Hardware Abstraction Layer (HAL).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

volmgt_running() tells whether or not Volume Management is running.

Return Values

volmgt_running() always returns 0 indicating Volume Management (as implemented by vold) is not running.

Errors

volmgt_running() will fail, returning 0, if a stat(2) or 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 to see if Volume Management was running.

Examples

Example 1 Using volmgt_running()

To see if Volume Management is running:

if (volmgt_running() != 0) {
        (void) printf("Volume Management is running\n");
} else {
        (void) printf("Volume Management is NOT running\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), volmgt_check(3VOLMGT), volmgt_inuse(3VOLMGT), attributes(7), hal(7)

Notes

Volume Management must be running for many of the Volume Management library routines to work.