I Ntroduction - Axis 2400 - PHP3 GUIDE Manual

Appendix A – Included Application
5 Appendix A – Included application
Note The general rule is to not use a function when it's usage
:
is not fully understood!
5.1 Introduction
This document explains some of the applications that are shipped with the Axis
2400/2401 products.
These applications are:
!
sh, the shell used on the cameras (a modified sash)
!
bufferd, a program for buffering images
!
utask, a program for scheduling tasks (similar to cron or at).
Besides these applications the additional PHP3-scripts that define extra functions are
explained.
The task-scheduler is used to start programs or scripts when certain events occur. The
scripts can be shell-scripts or PHP3-scripts, and can start the buffering of images or
upload files by using FTP or SMTP.
5.2 The shell - sh
sh is a rewrite of David Bell's sash.
The commands available in sh are essentially the same as the ones commonly used in
other shells on any Linux/Un*x system, so the manual pages can often be of use. The
difference is that the commands in sh have been simplified, i.e. options have been
removed. Besides these modifications some commands have been added which are
not part of the original, and thus not documented as a manual-page.
Axis Communications AB does not provide support for application development of any kind. The
information here is provided "as is", and there is no guarantee that any of the examples shown
will work in your particular application.
Revision 0.91 June 2001 21