> I was more interested in stuff like "LOGGER" to put messages into the system
> log (especially if the log is over on that central administration server)
> and automation tools on that central server to act upon incoming messages is
> adminstrator specified ways.
On the Linux side you need to issue the command "/sbin/halt" as root. In
unix thats 'a process running with uid 0' not neccessarily a root user login
session.
A simple example I'd probably want to review rather harder on a public
network would be something like
int main(int argc, char *argv[])
{
printf("Content-type: text/plain\n");
printf("Pragma: no-cache\n");
printf("Cache-control: no-cache\n\n");
syslog("%s", "Halt by web client");
signal(SIGPIPE, SIG_IGN); // so halt isnt killed in error
execl("/sbin/halt", "halt", NULL);
}
and shove that in /cgi-bin/admintools/halt.cgi
Create a /cgi-bin/admintools/.htaccess of
AuthUserFile /usr/local/etc/adminpassword
AuthGroupFile /dev/null
AuthName "Admin Tools"
AuthType Basic
<Limit GET POST>
require valid-user
</Limit>
do "htpasswd -c /usr/local/etc/adminpassword username" and set up any
needed user/password pairs.
You can now provide a link to the cgi that should (if I got the above right
from memory) require one of the user/password pairs to run the client
which will print the headers for a text/plain web page followed by any
/sbin/halt output up to the point networking is killed off
If wholesale web based sysadmin appeals to you take a glance at
www.webmin.com
Alan
