generating events in Unix/c/Python

Question

I want to write up a Program either in C / Python - Unix(Open SUSE) for the following:-

1) Report / alarm mechanism : wherin if some updatation has been done in particular folder, or anything else changed at OS level, then it would raise an alarm or a signal should be sent to already executing program and would then do accordingly.

I read signal() seems to be a solution to my problem, but how can i use this user-defined signal to solve my purpose. Please help. Some resources would be good.

Or if any other technique is available kindly let me know.

Thanks

should be there a 2) point ?

joaquin
– joaquin

2011-12-04 20:39:42 +00:00
Commented Dec 4, 2011 at 20:39 — joaquin
– joaquin, Commented Dec 4, 2011 at 20:39
joaquin: There is no point 2.

Noufal Ibrahim
– Noufal Ibrahim

2011-12-06 13:58:55 +00:00
Commented Dec 6, 2011 at 13:58 — Noufal Ibrahim
– Noufal Ibrahim, Commented Dec 6, 2011 at 13:58
no point in saying this.

hochl
– hochl

2011-12-06 14:14:20 +00:00
Commented Dec 6, 2011 at 14:14 — hochl
– hochl, Commented Dec 6, 2011 at 14:14

Rami Jarrar · Accepted Answer · 2011-12-04 19:37:05Z

1

Use libev, its easy to embed it into your application,, Using either C or Python. http://software.schmorp.de/pkg/libev.html

and this is a refrence,, http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod

answered Dec 4, 2011 at 19:37

Rami Jarrar

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jsbueno · Accepted Answer · 2011-12-07 02:27:18Z

0

Looks like the right tool for your job is Pyinotify --

Project overview page is here: https://github.com/seb-m/pyinotify/wiki

The URL for the code is just here, but it can be installed with Python's easy_install or pip: https://github.com/seb-m/pyinotify

It is designed just for that: call a function on your running code whenever some monitored directory or file is modified in a linux system.

==edit==

sorry, Imissed the "anything else changed at OS level" part - but maybe that is just to broad for a single answer. However, the one technology developed with Linux for notifying porograms of system-level events (like peripheral and filesystem connect/disconnect, CPU state changes, and so on) is DBUS.

DBUS can be used from both C and Python - I had not used it, but inherit from KDE 3 era DCOP idea - DCOP used to be quite usable. You can see examples and instrucions on how o use DBUS here:

edited Dec 7, 2011 at 2:27

answered Dec 6, 2011 at 13:49

jsbueno

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1 Comment

Noufal Ibrahim Over a year ago

PyInotify is only for file system events.

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