volmgt_inuse(3VOLMGT) Volume Management Library Functions volmgt_inuse(3VOLMGT)
NAME
volmgt_inuse - check whether or not Volume Management is managing a pathname
SYNOPSIS
cc [ flag ... ] file ... -lvolmgt [ library ... ]
#include <volmgt.h>
int volmgt_inuse(char *pathname);
DESCRIPTION
volmgt_inuse() checks whether Volume Management is managing the specified pathname.
RETURN VALUES
A non-zero value is returned if Volume Management is managing the specified pathname, otherwise 0 is returned.
ERRORS
This routine can fail, returning 0, if a stat(2) of the supplied pathname or an 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 for the supplied pathname for use.
EXAMPLES
Example 1: Using volmgt_inuse()
To see if Volume Management is managing the first floppy disk:
if (volmgt_inuse("/dev/rdiskette0") != 0) {
(void) printf("volmgt is managing diskette 0
");
} else {
(void) printf("volmgt is NOT managing diskette 0
");
}
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
cc(1B), vold(1M), open(2), stat(2), errno(3C), volmgt_check(3VOLMGT), volmgt_running(3VOLMGT), attributes(5), volfs(7FS)
NOTES
This routine requires Volume Management to be running.
Since volmgt_inuse() returns 0 for two different cases (both when a volume is not in use, 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 5.10 31 Dec 1996 volmgt_inuse(3VOLMGT)