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 ...-lvolgmt [library ...]

       #include <volmgt.h>

       ulonglong_t media_getid(char *vol_path);

DESCRIPTION

       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

       media_getid()  returns  the  id	of  the volume. This value is unique for each volume. If media_getid() returns 0, the path provided is not
       valid, for example, it is a block or char device.

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
",
		      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			   |
       +-----------------------------+-----------------------------+
       |Commitment Level	     |Public			   |
       +-----------------------------+-----------------------------+

SEE ALSO

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

SunOS 5.10							    29 Apr1998						      media_getid(3VOLMGT)