mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-09-11 08:07:30 -04:00
29 lines
809 B
Plaintext
29 lines
809 B
Plaintext
The following explains how to demonstrate the woof.d DTrace script.
|
|
|
|
This script is only useful if you have an audio device, /dev/audio. To test
|
|
audio, you can run:
|
|
|
|
$ audioplay /usr/share/audio/samples/au/sample.au
|
|
|
|
The volume can be adjusted from a few tools, including,
|
|
|
|
$ /usr/dt/bin/sdtaudiocontrol
|
|
|
|
...
|
|
|
|
woof.d will bark whenever a new process is created. In order to demonstrate
|
|
it, first run the following:
|
|
|
|
# ./woof.d &
|
|
|
|
You have now installed the dog (if the dog becomes a nusience, you are
|
|
allowed to kill it). Now compare the difference between these recursive
|
|
grep commands:
|
|
|
|
$ find /etc -type f -exec grep localhost {} \;
|
|
|
|
$ find /etc -type f -exec grep localhost {} +
|
|
|
|
The first find command is the "bad way", the second is the "good way". You
|
|
will hear for yourself why this is the case.
|