volmgt_symname(3VOLMGTVolume Management Library Functiovolmgt_symname(3VOLMGT)NAME
volmgt_symname, volmgt_symdev - convert between Volume Management sym‐
bolic names, and the devices that correspond to them
SYNOPSIS
cc [ flag ... ] file ... -lvolmgt [ library ... ]
#include <volmgt.h>
char *volmgt_symname(char *pathname);
char *volmgt_symdev(char *symname);
DESCRIPTION
These two routines compliment each other, translating between Volume
Management's symbolic name for a device, called a symname, and the /dev
pathname for that same device.
volmgt_symname() converts a supplied /dev pathname to a symname, Volume
Management's idea of that device's symbolic name (see volfs(7FS) for a
description of Volume Management symbolic names).
volmgt_symdev() does the opposite conversion, converting between a sym‐
name, Volume Management's idea of a device's symbolic name for a vol‐
ume, to the /dev pathname for that device.
RETURN VALUESvolmgt_symname() returns the symbolic name for the device pathname sup‐
plied, and volmgt_symdev() returns the device pathname for the supplied
symbolic name.
These strings are allocated upon success, and therefore must be freed
by the caller when they are no longer needed (see free(3C)).
ERRORSvolmgt_symname() can fail, returning a null string pointer, if a
stat(2) of the supplied pathname fails, or if 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 trying to con‐
vert the supplied pathname to a symname.
volmgt_symdev() can fail if 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 trying to con‐
vert the supplied symname to a /dev pathname.
EXAMPLES
Example 1: Testing Floppies
The following tests how many floppies Volume Management currently sees
in floppy drives (up to 10):
for (i=0; i < 10; i++) {
(void) sprintf(path, "floppy%d", i);
if (volmgt_symdev(path) != NULL) {
(void) printf("volume %s is in drive %d\n",
path, i);
}
}
Example 2: Finding The Symbolic Name
This code finds out what symbolic name (if any) Volume Management has
for /dev/rdsk/c0t6d0s2:
if ((nm = volmgt_symname("/dev/rdsk/c0t6d0s2")) == NULL) {
(void) printf("path not managed\n");
} else {
(void) printf("path managed as %s\n", nm);
}
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOcc(1B), vold(1M), open(2), stat(2), free(3C), malloc(3C),
volmgt_check(3VOLMGT), volmgt_inuse(3VOLMGT), volmgt_running(3VOLMGT),
attributes(5), volfs(7FS)NOTES
These routines only work when Volume Management is running.
BUGS
There should be a straightforward way to query Volume Management for a
list of all media types it's managing, and how many of each type are
being managed.
SunOS 5.10 31 Dec 1996 volmgt_symname(3VOLMGT)
