Re: appended crontab entries with py script
On Tue, 2005-09-13 at 23:18 -0400, Mike Meyer wrote:
> rbt <[EMAIL PROTECTED]> writes:
>
> > How can I safely append a crontab entry to a crontab file
> > progammatically with Python?
>
> Well, one way would be to invoke the system crontab utility and use an
> "editor" that passes the file to your program, and reads the results
> back.
>
> > I need to handle crontabs that currently have entries and crontabs that
> > are empty. Also, I'd like this to work across Linux and BSD systems.
> >
> > Any pointers?
>
> I think most Free Unix systems use the Vixie cron, and the non-free
> ones have a "crontab" command (do some of them call it cron?) with the
> same API. So you're pretty safe using that.
>
> If you want to assume that you're going to have the vixie cron, you
> could dig into it's guts to see what it does for locking, and do that
> by hand.
>
> current_crontab.txt')
cur_cron.read()
cur_cron.close()
fp = file('current_crontab.txt', 'a')
print >> fp, "0 * * * * %s/.theft_recovery.py" %home
fp.close()
load = os.popen('crontab current_crontab.txt')
load.read()
load.close()
--
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Re: appended crontab entries with py script
rbt <[EMAIL PROTECTED]> writes: > How can I safely append a crontab entry to a crontab file > progammatically with Python? Well, one way would be to invoke the system crontab utility and use an "editor" that passes the file to your program, and reads the results back. > I need to handle crontabs that currently have entries and crontabs that > are empty. Also, I'd like this to work across Linux and BSD systems. > > Any pointers? I think most Free Unix systems use the Vixie cron, and the non-free ones have a "crontab" command (do some of them call it cron?) with the same API. So you're pretty safe using that. If you want to assume that you're going to have the vixie cron, you could dig into it's guts to see what it does for locking, and do that by hand. http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
appended crontab entries with py script
How can I safely append a crontab entry to a crontab file progammatically with Python? I need to handle crontabs that currently have entries and crontabs that are empty. Also, I'd like this to work across Linux and BSD systems. Any pointers? -- http://mail.python.org/mailman/listinfo/python-list
