oh yeah, and be careful.. make sure your script has an array of commands its allowed to run, that way no one can cat /etc/passwd through your script or something like that. if you're going to need to cehck files on the system.. it might pay to setup an array of those files, that way no one can access anything you don't want them to see via your script. ie: 
my  @CMDS = ("ps", "top", "df", "vmstat", "blah");
my  @FILES = ( "/etc/running.cfg", "/home/me/lastchecked.txt", "/var/l
+og/httpd/error_log");

my ($cmd, @ARGS) = split(/\s/, $input);
my $ok;
for(@CMDS) {
    if($cmd eq $_) { $ok=1; }
}
if(!$ok) { die "tried to do something that wasn't cool: $input\n"; }
# then check for files in args
my $ok=0;
my $arg;
foreach $arg (@ARGS)
    if(-e $arg) { 
        # we have a file
        $file=true;
        for(@FILES) {
            if($arg eq $_) {
                $ok=1;
            }
        }
    }
}
if($file && !$ok) { die "tried to access a bad thing: $input\n"; }
# We're pretty much safe to continue

[download]

untested, but you get the idea.. make sure that only what you anticipate being input is actually input, that way you can pretty much secure the script.. also run it as a user with as little privileges as possible..

-brad

In reply to Re: RPC by reyjrar
in thread RPC by jeffa

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