Examples from www.dtracebook.com

[David Wolfskill]

On Tue, Dec 10, 2013 at 03:43:16PM -0800, hiren panchasara wrote:
> http://www.dtracebook.com/index.php/Introduction_to_DTrace:read-syscall.d
> 
> $ sudo dtrace -n 'syscall::read:entry /execname != "dtrace"/ {
> @reads[execname, fds[arg0].fi_pathname] = count(); }'
> dtrace: invalid probe specifier syscall::read:entry /execname !=
> "dtrace"/ { @reads[execname, fds[arg0].fi_pathname] = count(); }: in
> action list: fds has not yet been declared or assigned
> 
> This is on FreeBSD -head.
> 
> 
> $ sudo dtrace -l | grep " read entry"
> 49341    syscall         freebsd32                              read entry
> 50413    syscall           freebsd                              read entry
> 
> What am I missing? What does "invalid probe specifier " mean here?
> ....

Exactly what the message says: "fds has not yet been declared or
assigned".  We don't presently have the fds array -- see p. 131 of the
book.

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
Taliban: Evil cowards with guns afraid of truth from a 14-year old girl.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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