On Mon, Nov 03, 2008 at 04:31:20AM -0800, [EMAIL PROTECTED] wrote:
> I am very now to DTrace land.
>
> 1) I want to write a DTrace script which takes -verbose or --verbose as an
> option.
>
> #!/usr/sbin/dtrace -s
> #pragma D option quiet
>
> pid$1::func1:entry
> {
> /* should be called only when verbose option is provided in command line
> */
> printf("Entered %s ...\n", probefunc);
> }
> pid$1::func2:entry,
> {
> /* should be called always */
> }
> END
> {
> /* should be called always */
> /* print out summary */
> }
>
> It should be normally run as
> $./myscript.d 9149
> (where 9149 is the pid of the process I want to trace)
>
> when I want more detailed information, I should be able to run it as
> $./myscript.d 9149 --verbose
>
> Is something of this sort possible ?
Not directly; you can't have optional arguments to your script.
Your options are:
1. Write a shell script that runs dtrace; you could do:
#!/bin/sh
verbose=0
if [[ $1 = "--verbose" ]]; then
shift
verbose=1
fi
pid=$1
/usr/sbin/dtrace -s /dev/stdin <<EOF
#pragma D option quiet
pid$pid::func1:entry
/ $verbose /
{
printf("Entered %s ...\n", probefunc);
}
...
EOF
> 2) Also I saw that END gets executed when I press Control C. But when I want
> to send output to another file via tee as shown below :
> $./myscript.d |tee dtrace.log
> and when I press control C, it doesn't get called. Any ideas?
Your control-C is killing tee; END is getting executed, but the pipe is closed
by the death of tee. You could do:
% ./myscript.d > dtrace.log
(in another window)
% tail -f dtrace.log
Cheers,
- jonathan
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