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| Volume Management Library Functions | volmgt_inuse(3VOLMGT) |
| | volmgt_inuse - check whether or not Volume Management is managing a pathname |
SYNOPSIS
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cc [ flag ... ] file ... -lvolmgt [ library ... ]
#include <volmgt.h>
int volmgt_inuse(char *pathname); |
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volmgt_inuse() checks whether Volume Management is managing the specified pathname.
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A non-zero value is returned if Volume Management is managing the specified pathname, otherwise 0 is returned.
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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.
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EINTR
- An interrupt signal was detected while checking for the supplied pathname for use.
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| | Example 1. Using volmgt_inuse
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To see if Volume Management is managing the first floppy disk:
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if (volmgt_inuse("/dev/rdiskette0") != 0) {
(void) printf("volmgt is managing diskette 0\n");
} else {
(void) printf("volmgt is NOT managing diskette 0\n");
}
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See attributes(5) for descriptions of the following
attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | MT-Safe |
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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.
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