VOLMGT_CHECK(3VOLMGT) Volume Management Library Functions

NAME

volmgt_check - have Volume Management check for media

SYNOPSIS

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

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This function is obsolete.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Volume Management feature, including vold, has been replaced by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


This routine asks volume Management to check the specified pathname
and determine if new media has been inserted in that drive.


If a null pointer is passed in, then Volume Management will check
each device it is managing that can be checked.


If new media is found, volmgt_check() tells volume management to
initiate appropriate actions.

RETURN VALUES

The return from this function is undefined.

ERRORS

This routine can fail, returning 0, if a stat(2) or open(2) of the
supplied pathname fails, or if any of the following is true:

ENXIO
volume management is not running.


EINTR
An interrupt signal was detected while checking for media.

EXAMPLES

Example 1: Checking If Any New Media Is Inserted

To check if any drive managed by volume management has any new media
inserted in it:


if (volmgt_check(NULL)) {
(void) printf("Volume management found media\n");
}


This would also request volume management to take whatever action was
appropriate for the new media.

ATTRIBUTES

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


+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|MT-Level | MT-Safe |
+---------------+-----------------+

SEE ALSO

volcheck(1), open(2), stat(2), volmgt_inuse(3VOLMGT),
volmgt_running(3VOLMGT), attributes(7), hal(7)

NOTES

Since volmgt_check() returns 0 for two different cases (both when no
media is found, and when an error occurs), it is up to the user to
check errno to differentiate the two, and to ensure that volume
management is running.

March 8, 2007 VOLMGT_CHECK(3VOLMGT)