08-01-2014
Quote:
Originally Posted by
mo_VERTICASQL
Will do and thanks for the heads up!
is there a any logs in specific your thinking of? i'm just curious.
I don't know, that depends on what's running it. That's why any programs you write should make as little noise as possible unless they actually have anything important to say.
If it's run by an init script, it might end up somewhere in /var/log.
If it's run by cron, any program output from that gets automatically emailed to user@hostname via the server's own MTA... or dumped in $HOME/dead.letter if none's available. (Meaning, if it is cron-ed, it might be possible to simplify that script by letting
cron do the mailing for it.)
etc.
It might go nowhere at all. It's not THAT big a deal in the end. I just don't want you to end up with a slowly growing file under /var/log which will get ignored for 10 years until the partitions full... Or a confused customer wondering why they're suddenly getting 3 emails full of nonsense a day
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CRON(8) System Manager's Manual CRON(8)
NAME
cron - clock daemon
SYNOPSIS
auth/cron [-c]
DESCRIPTION
Cron executes commands at specified dates and times according to instructions in the files /cron/user/cron. It runs only on an authentica-
tion server. Option -c causes cron to create /cron/user and /cron/user/cron for the current user; it can be run from any Plan 9 machine.
Blank lines and lines beginning with # in these files are ignored. Entries are lines with fields
minute hour day month weekday host command
Command is a string, which may contain spaces, that is passed to an rc(1) running on host for execution. The first five fields are integer
patterns for
minute 0-59
hour 0-23
day of month 1-31
month of year 1-12
day of week 0-6; 0=Sunday
The syntax for these patterns is
time : '*'
| range
range : number
| number '-' number
| range ',' range
Each number must be in the appropriate range. Hyphens specify inclusive ranges of valid times; commas specify lists of valid time ranges.
To run the job, cron calls host and authenticates remote execution, equivalent to running rx host command (see con(1)). The user's profile
is run with $service set to rx.
Cron is not a reliable service. It skips commands if it cannot reach host within two minutes, or if the cron daemon is not running at the
appropriate time.
EXAMPLES
Here is the job that mails system news.
% cat /cron/upas/cron
# send system news
15 8-17, 21 *** helix /mail/lib/mailnews
%
SOURCE
/sys/src/cmd/auth/cron.c
SEE ALSO
con(1), rc(1)
CRON(8)