bin/111835: fstat(1) fails to report certain files

[Mikhail Teterin]

>Number:         111835
>Category:       bin
>Synopsis:       fstat(1) fails to report certain files
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Apr 18 23:10:09 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Mikhail Teterin
>Release:        FreeBSD 6.2-PRERELEASE i386
>Organization:
Virtual Estates, Inc. http://sybpipe.com/
>Environment:
System: FreeBSD symbion.zaytman.com 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #0: Tue Nov 7 23:40:58 EST 2006 root at symbion.zaytman.com:/usr/obj/ibm/src/sys/SYMBION i386

>Description:
	I noticed, I could not play sound any more:
		Can't open /dev/dsp!

	So I tried to check, which process may hold the /dev/dsp* or /dev/audio* using fstat:

		% fstat /dev/dsp* /dev/audio*
		USER     CMD          PID   FD MOUNT      INUM MODE         SZ|DV R/W NAME
		%

	Puzzled, I decided to give lsof a try:

		% lsof | grep dsp
		artsd       105   anat   11u    VCHR       0,40 0x2372d3000       40 /dev/dsp0.0
		artsd       105   anat   11u    VCHR       0,40 0x2372d3000       40 /dev/dsp0.0
		artsd       105   anat   11u    VCHR       0,40 0x2372d3000       40 /dev/dsp0.0

	So, for whatever reason, fstat failed -- and needs to be fixed...

>How-To-Repeat:
>Fix:

	Use lsof...
>Release-Note:
>Audit-Trail:
>Unformatted: