volmgt_check(3volmgt) [sunos man page]

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 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 any "actions" specified in /etc/vold.conf (see vold.conf(4)).

RETURN VALUES

       This routine returns  0 if no media was found, and a non-zero value if any media was found.

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 specified in /etc/vold.conf for any media found.

ATTRIBUTES

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

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

SEE ALSO

       cc(1B), volcheck(1), vold(1M), open(2), stat(2),  volmgt_inuse(3VOLMGT), volmgt_running(3VOLMGT), vold.conf(4), attributes(5), volfs(7FS)

NOTES

       Volume Management must be running for this routine to work.

       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 5.10							    31 Dec 1996 					     volmgt_check(3VOLMGT)

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

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

       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 symname, Volume Management's idea of a device's symbolic name for a vol-
       ume, to the /dev pathname for that device.

RETURN VALUES

       volmgt_symname() returns the symbolic name for the device pathname supplied, and volmgt_symdev() returns the device pathname for  the  sup-
       plied 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)).

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
",
			   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
");
       } else {
	       (void) printf("path managed as %s
", nm);
       }

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),  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)