On 12 May 98 at 8:30, Jack Killpatrick wrote:
> again. They then asked me what emails they had not received. I
> looked in my database and gave them copies of the last records in
> the table, but told them that I didn't know when sendmail stopped
> being usable, so they'd have to check the database info against the
> emails they already received to see what they hadn't received. It
> was kind of a hassle. In the first place, I wasn't aware of the
> problem, in the second place I didn't have an easy way of tracking
> the unsent emails. Note that these weren't even emails drifting
> around in cyberspace; they never even got created.
Couple of ideas. I often now send myself an email rather than doing
a || die -- or print_error as I would usually do or send me an email
and print_error. In the case of something critical such as you
mentioned, I would suggest that
> So, I'm looking for a way to be able to know whether an email was
> created and sent or not. Let's say sendmail doesn't even start up,
> and thus can't return an exit code, I need to know what email send
if using the
open sendmail || warn me of problem
>From Rich:
> What you propose will tell you if sendmail returns a non-zero exit
> code immediately, but that isn't what you really need to know: you
> need to know if the mail actually got delivered. And there's no
If you cannot open sendmail then I think you get the warning. If you
can open sendmail but it cannot deliver for one reason or
other...well then there is no easy method.
Did you use the
open || die
or just open. If you did just open then your program will continue
regardless of what the sendmail open does. Perl will gladly glide
along.
> Could my script just look for _no_ exit code coming from sendmail,
> write an error to the user in html and write a record to my database
> detailing the non-send? Seems like that could work. Hmmm. At that
I am surprised that your cgi could even start if it could not then
send email.
> point the user on the web would get an error notice, but not me (I
> don't plan on sitting at the console). I could ask the web user to
> call Customer Service at my client and notify them of the error,
> then Customer Service could call me. Hmmm, that might work. Any
> thoughts?
As I mentioned. I think it is always best to do a :
do this || warn me of failure
and then you email yourself and depending on the context you exit the
program or continue. That way you can be kept abreast of how a
program is operating.
Another thing. You may want to consider a cron job. Set it to run on
an hourly basis and check your system status. Send the results to
you via email. I don't know what the best thing to do would be..
Off the top of my hairless head:
cheap and fairly quick:
(note I would never use backticks in any cgi program)
Another note. I don't like the idea or running top without somehow
quitting it (just don't know).
I hate seeing those zombies in there. I wonder if I started them or
someone else did. How would I know.
But I think something like the following might be interesting. You
could even pass it to a webpage.
I have seen much more sophisticated programs that do this--but at
iserver.com you cannot run these (last time I tried) from a
cgi--unless you put them in your bin but then I wonder if they will
really run.
Peter
#!/usr/local/bin/perl5
$email_tech = "webmaster\@rede.com";
$process = `ps`;
$date = `date`;
$top = `top`;
`/usr/bin/mail -s "SysCheck on $date" $email_tech << END
$date
Process Check:
$process
----------------
Top Check:
$top
----------------
END
`;
And running this sends me this email:
Tue May 12 22:10:10 MDT 1998
Process Check:
PID TT STAT TIME COMMAND
393 p0 S+ 0:00.03 perl5 sysup.pl
394 p0 R+ 0:00.02 ps
27968 p0 Is 0:00.19 -csh (csh)
29556 p0 I 0:00.07 bash
29565 p0 I 0:00.14 -csh (tcsh)
29583 p0 S 0:00.14 bash
----------------
Top Check:
load averages: 0.03, 0.02, 0.00 22:10:11
94 processes: 4 running, 86 sleeping, 4 zombie
Memory: Real: 7688K/29M Virt: 27M/492M Free: 14M
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
29931 rede 2 0 4308K 4296K sleep 0:06 1.86% 1.86% bob.pl
393 rede 2 0 596K 520K sleep 0:00 3.00% 0.15% perl5
398 rede 28 0 240K 392K run 0:00 1.00% 0.05% top
29583 rede 10 0 692K 688K sleep 0:00 0.05% 0.05% bash
29565 rede 18 0 764K 608K sleep 0:00 0.00% 0.00% tcsh
27968 rede 18 0 224K 308K sleep 0:00 0.00% 0.00% csh
29556 rede 10 0 704K 692K sleep 0:00 0.00% 0.00% bash
29928 rede 10 0 204K 180K sleep 0:00 0.00% 0.00% sh
19018 rede 2 0 916K 348K sleep 0:00 0.00% 0.00% aftpd
24593 rede 2 0 1728K 20K sleep 0:00 0.00% 0.00% <httpd>
24503 rede 2 0 1728K 20K sleep 0:00 0.00% 0.00% <httpd>
13481 rede 2 0 920K 20K sleep 0:00 0.00% 0.00% <aftpd>
----------------
_________________________________________________________
Peter J. Schoenster [EMAIL PROTECTED]
Exercise Your Brain..Read a Book http://www.rede.com/
Free CGI Scripts and Applications
http://www.rede.com/samples/index.html
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