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Top Forums Shell Programming and Scripting Is this the "right" way to make an alarmclock? Post 302557821 by ninjaaron on Thursday 22nd of September 2011 07:32:51 AM
Old 09-22-2011
Hmmm... this "at" looks a little complicated, but useful. I'll have to play with it a little.

On first glance, it looks like the syntax is better suited to scripts than terminal. Is that correct?

---------- Post updated at 02:32 PM ---------- Previous update was at 02:13 PM ----------

Quote:
Originally Posted by pludi
DoW == Day of Week. Meaning the possibility to set different alarm times based on the day (wouldn't want the alarm to ring on 06:00 on a Saturday since I just went to bed Smilie )
Ah. right. I was thinking about (among other things), calling it from another script with config files to organize calender events and things like that, and letting the parent script handle day of the week stuff.

Quote:
@Skrynesaver: at does basically the same. But I think for someone who's just learning the hang of scripting, this is a good starting project, as it can be extended over time.
I woudn't exactly say I'm 'just learning the hang of it.' I'm somewhere in the "upper-beginner/lower intermediate" level of bash (though bash is just a doorway to other things, I guess). I've written scores of them. My .xinitrc and .bashrc are from scratch. I've written some scripts that search web websites for correct files to download automatically, or create new directory strutures based on file types. I actually even wrote a system of 20 or so scripts to coordinated a bunch of UI elements to get a good system going on my netvertible with config files and everything. I can write scripts that do all kinds of cool things.

I'm just always insecure about whether I'm doing it the best possible way. For a while, I called all of my command substitutions with `substitution` syntax, and I would run into these weird problems with no apparent solution, and then I randomly stumbled across $(substitution) syntax and figured out how much better it is.

And I still need to learn sed. It looks so awesome for making config files, but I'm intimidated by the size of the man page. Smilie

Last edited by ninjaaron; 09-22-2011 at 08:42 AM..
 

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SYSLOGOUT(8)						      System Manager's Manual						      SYSLOGOUT(8)

NAME
syslogout - modular centralized shell logout mechanism DESCRIPTION
syslogout is a generic approach to enable centralized shell logout actions for all users of a given system in a modular and centralized way mostly aimed at avoiding work for lazy sysadmins. It has only been tested to work with the bash shell. It basically consists of the small /etc/syslogout shell script which invokes other small shell scripts having a .bash suffix which are con- tained in the /etc/syslogout.d/ directory. The system administrator can drop in any script he wants without any naming convention other than that the scripts need to have a .bash suffix to enable automagic sourcing by the /etc/syslogout script. For shell sessions, the contents of /etc/syslogout.d/" will be sourced by every user at logout if the following lines are present in his $HOME/.bash_logout: if [ -f /etc/syslogout ]; then . /etc/syslogout fi If used for X sessions it is advisable to include the former statement into the Xreset script of the X display manager instead to prevent that closing of an terminal emulator window yields unexpected results in your running X session if your X11 terminal emulator is using a login shell. Be sure then to run it under the user-id of the X session's user. See the example files in /usr/share/doc/syslogout/ for illustration. Users not wanting /etc/syslogout to be sourced for their environment can easily disable it's automatic mechanism. It can be disabled by simply creating an empty file called $HOME/.nosyslogout in the user's home directory using e.g. the touch(1) command. Any single configuration file in /etc/syslogout.d/ can simply be overridden by any user by creating a private $HOME/.syslogout.d/ directory which may contain a user's own version of any configuration file to be sourced instead of the system default. It's names have just to match exactly the system's default /etc/syslogout.d/ configuration files. Empty versions of these files contained in the $HOME/.syslo- gout.d/ directory automatically disable sourcing of the system wide version. Naturally, users can add and include their own private scripts to be automagically executed by /etc/syslogout at logout time. OPTIONS
There are no options other than those dictated by shell conventions. Anything is defined within the configuration scripts themselves. SEE ALSO
The README files and configuration examples contained in /usr/share/doc/syslogout/ and the manual page for bash(1), xdm(1x), xdm.options(5), and wdm(1x). Recommended further reading is everything related with shell programming. If you need a similar mechanism for executing code at login time check out the related package sysprofile(8) which is a very close compan- ion to syslogout. BUGS
syslogout in its current form is mainly restricted to bash(1) syntax. In fact it is actually a rather embarrassing quick and dirty hack than anything else - but it works. It serves the practical need to enable a centralized bash configuration until something better becomes available. Your constructive criticism in making this into something better" is very welcome. Before i forget to mention it: we take patches... ;-) AUTHOR
syslogout was developed by Paul Seelig <pseelig@debian.org> specifically for the Debian GNU/Linux system. Feel free to port it to and use it anywhere else under the conditions of either the GNU public license or the BSD license or both. Better yet, please help to make it into something more worthwhile than it currently is. SYSLOGOUT(8)
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