media_getid(3volmgt) [sunos man page]

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)

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

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       This  function  is obsolete.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 soft-
       ware 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.

       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
");
	 }

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

ATTRIBUTES

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

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

SEE ALSO

       cc(1B), volcheck(1), open(2), stat(2), volmgt_inuse(3VOLMGT), volmgt_running(3VOLMGT), attributes(5), hal(5)

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 to
       check errno to differentiate the two, and to ensure that volume management is running.

SunOS 5.11							    8 Mar 2007						     volmgt_check(3VOLMGT)