Ok that works
Next problem is - checking if a drive is mounted to a variable
( eg cat /etc/mtab | grep /mnt/example ) do as system() or ?
With Rsync - is there any easy way to monitor runtime, system call
seems to return before completion.
Regards
Stewart Evans
TOTD Do good and fear nobody, Do ill and fear everyone
----- Original Message -----
From: "Charlie Brady" <[EMAIL PROTECTED]>
To: "Stewart Evans" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Saturday, February 23, 2002 1:27 AM
Subject: Re: [e-smith-devinfo] System Functions Acess
>
> On Fri, 22 Feb 2002, Stewart Evans wrote:
>
> > Pardon me for asking but what is the correct way to access system
functions
> > such as mount, df, format, umount and ls from a web panel
> > with error handling
> >
> > example cut from reboot
> >
> > esmith::util::backgroundCommand (8, "/sbin/e-smith/signal-event",
> > "reboot");
>
> This is if you want to initiate a background event, which you will only
> want to do rarely. "reboot" is one example, since you want to return
> immediately and tell the user that it's about to happen.
>
> > Example from backup
> >
> > system("/sbin/e-smith/signal-event", "conf-backup") == 0
> > or die("Error occured during conf-backup event.\n");
>
> This is the way that you will usually do it.
>
> > this fails to work ( with/out -t )
> >
> > system("mount /mnt/floppy" ) == 0
> > or die ("Error occurred while mounting floppy.\n");
>
> And this is to be avoided. Firstly you should use a full path name, so
> that you don't depend on the PATH variable. It's also more efficient to
> use the multiple argument form of system(), as you don't need to call the
> shell to parse the string "mount /mnt/floppy" into seperate arguments.
>
> It's also safer to use the multiple argument form of system. If you were
> to do system("/bin/mount $device"), then you might open up the possibility
> to do system("/bin/mount /mnt/floppy ; rm -rf /") if an attacker could
> somehow set/change the value of $device. If you do system("/bin/mount",
> $device), then the worst thing that happens is mount writes:
>
> mount: can't find /mnt/floppy ; rm -rf / in /etc/fstab or /etc/mtab
>
> to standard error.
>
> --
> Charlie Brady [EMAIL PROTECTED]
> Lead Product Developer
> Network Server Solutions Group http://www.e-smith.com/
> Mitel Networks Corporation http://www.mitel.com/
> Phone: +1 (613) 368 4376 or 564 8000 Fax: +1 (613) 564 7739
>
>
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