Thank you all for your answers. I'm still trying to get it work...


Regarding to the questions you made:

- OS: RedHat ES4   (SELinux disabled)

- Backtrack version: BackupPC-3.2.0beta0.tar.gz

- # md5sum BackupPC_Admin.pl
09a57b60d416191c6239a6e7ea08ddc2  BackupPC_Admin.pl

- # perl -c BackupPC_Admin.pl
Args must match #! line at BackupPC_Admin.pl line 1.

- head -1 BackupPC_Admin.pl:  the PERL path is correct.


Lighttpd is executing as "lighttpd" user and group. I tried to change it to 
"backuppc" but then I can not run lighttpd (it says FAILED if I try to start 
it). It doesn't run with root user.


drwxr-xr-x  2 root     root     4096 Oct  5 18:30 .
drwxr-xr-x  4 root     root     4096 Oct  5 17:54 ..
-r-sr-xr--  1 backuppc backuppc 3995 Oct  5 17:54 BackupPC_Admin.pl
-r-sr-xr--  1 root     root     3995 Oct  10 18:29 b.pl
-rwsr-xr--  1 root     root     3993 Oct  2 14:10 sample2.pl
-rw-r--r--  1 root     root      116 Oct  2 14:09 sample.pl

Eventually I changed the file owner to backuppc but it didn't work either. And 
don't fully understand why I can run sample.pl but not BackupPC_Admin.pl. Lack 
of knowledge, I guess.


Thank you so much.

Laura.



> I can also run "sample.pl" and "sample2.pl" with no problems. It doesn't
> work either if the owner is "root".
> 

If lighttpd were running as user root, it could access BackupPC_Admin.pl no
matter who it belongs to. I'd guess it's the group membership that makes the
difference.

All of that said, it could probably be a completely different problem, but the
error message points in this direction (presuming "access()" refers to the
system call). If it's not permissions (which you could fix by either
'chmod a+x BackupPC_Admin.pl' or 'chgrp root BackupPC_Admin.pl' or even adding
the user lighttpd is running as to the group backuppc in /etc/group -
depending on which of those fits your taste and security needs best), you
could try some other things:

- perl -c BackupPC_Admin.pl
Is your script garbled in some way that makes it syntactically incorrect or
unable to find its library files? You might have to temporarily remove the
setuid bit from the permissions for this test.

- Look at the first line of the script ('head -1 BackupPC_Admin.pl'). Is the
path to the Perl binary correct? (Don't know if that's relevant for
lighttpd.)

- Give us more information on your setup (which version of BackupPC, what
OS and version, what user is lighttpd running as, where did you install
BackupPC to (which paths), is SElinux enabled, output of
'md5sum BackupPC_Admin.pl' ...).

But try fixing the permissions first, that seems to be the most likely
problem.

Regards,
Holger[/quote]

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