svn commit: r191677 - head/usr.bin/du

[Bruce Evans]

On Thu, 30 Apr 2009, Warner Losh wrote:

> Log:
>  Report the next directory being scanned when a ^T is pressed (or any
>  SIGINFO).  Provides some progress report for the impatient.

The impatient should use a tracing utility instead of encrufting
individual utilities.

>  This
>  won't report that we're blocking in our walk due to disk/network
>  problems, however.  There's no really good way to report that
>  condition that I'm aware of...

Tracing utilities coulld be extended to report kernel info.  E.g.,
the current [blocked] syscall can be found and reported in the same
way and detail that ddb does for backtrace and ps.  Names would be
harder to find, but a full backtrace normally locates what is blocking.

Bruce