VOLMGT_SYMNAME(3VOLMGT) Volume Management Library Functions

NAME

volmgt_symname, volmgt_symdev - convert between Volume Management
symbolic 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

This function is obsolete. The management of removable media by the
Volume Management feature, including vold, has been replaced by
software 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(7). The return value of this
function is undefined.


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.


volmgt_symdev() does the opposite conversion, converting between a
symname, Volume Management's idea of a device's symbolic name for a
volume, to the /dev pathname for that device.

RETURN VALUES

The return from this function is undefined.

ERRORS

volmgt_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 convert 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 convert 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(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
|Interface Stability | Obsolete |
+--------------------+-----------------+

SEE ALSO

open(2), stat(2), free(3C), malloc(3C), volmgt_check(3VOLMGT),
volmgt_inuse(3VOLMGT), volmgt_running(3VOLMGT), attributes(7), hal(7)

March 8, 2007 VOLMGT_SYMNAME(3VOLMGT)