MEDIA_GETID(3VOLMGT) Volume Management Library Functions MEDIA_GETID(3VOLMGT)


NAME


media_getid - return the id of a piece of media

SYNOPSIS


cc [flag ...] file ...-lvolmgt [library ...]

#include <volmgt.h>


ulonglong_t media_getid(char *vol_path);


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This function is obsolete.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Volume Management feature, including vold, has been replaced by software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(5). The return value of this function is undefined.


media_getid() returns the id of a piece of media. Volume management must
be running. See volmgt_running(3VOLMGT).

PARAMETERS


vol_path
Path to the block or character special device.


RETURN VALUES


The return from this function is undefined.

EXAMPLES


Example 1: Using media_getid()




The following example first checks if volume management is running, then
checks the volume management name space for path, and then returns the id
for the piece of media.


char *path;

...

if (volmgt_running()) {
if (volmgt_ownspath(path)) {
(void) printf("id of %s is %lld\n",
path, media_getid(path));
}
}


If a program using media_getid() does not check whether or not volume
management is running, then any NULL return value will be ambiguous, as
it could mean that either volume management does not have path in its
name space, or volume management is not running.


ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


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

SEE ALSO


volmgt_ownspath(3VOLMGT), volmgt_running(3VOLMGT), attributes(5), hal(5)


March 8, 2007 MEDIA_GETID(3VOLMGT)