Wei, Alice J. wrote:
________________________________________
From: Peter Ford [pete@xxxxxxxxxxxxx]
Sent: Tuesday, July 15, 2008 7:28 AM
To: Wei, Alice J.
Cc: php-general@xxxxxxxxxxxxx
Subject: Re: mkdir permission errors
Wei, Alice J. wrote:
-----Original Message-----
From: Peter Ford [mailto:pete@xxxxxxxxxxxxx]
Sent: Tuesday, July 15, 2008 4:06 AM
To: php-general@xxxxxxxxxxxxx
Subject: Re: mkdir permission errors
Wei, Alice J. wrote:
Hi, Rob:
I forgot to mention that I have been using yum install.
I have reinstalled the entire thing, put back all the packages, and then I went to /var and did a chmod -R 777 var, and then did a
[root@localhost var]# chown -R apache:apache .
Interestingly, I do not see anything different, and I still get this error that says my permission is denied. Here is my
[root@localhost var]# ps awxu | grep -E 'apache|httpd'
root 31547 0.0 0.3 21268 6584 ? Ss 16:12 0:00 /usr/sbin/httpd
apache 31549 0.0 0.2 21400 5572 ? S 16:12 0:00 /usr/sbin/httpd
apache 31550 0.0 0.2 21400 4908 ? S 16:12 0:00 /usr/sbin/httpd
apache 31551 0.0 0.2 21400 4908 ? S 16:12 0:00 /usr/sbin/httpd
apache 31552 0.0 0.2 21400 4896 ? S 16:12 0:00 /usr/sbin/httpd
apache 31553 0.0 0.2 21268 4860 ? S 16:12 0:00 /usr/sbin/httpd
apache 31554 0.0 0.2 21268 4860 ? S 16:12 0:00 /usr/sbin/httpd
apache 31555 0.0 0.2 21268 4860 ? S 16:12 0:00 /usr/sbin/httpd
apache 31556 0.0 0.2 21268 4860 ? S 16:12 0:00 /usr/sbin/httpd
root 31708 0.0 0.0 4120 728 pts/1 R+ 16:30 0:00 grep -E apache|httpd
Obviously, my last one has already changed the owner to apache already.Nevertheless, I am still denied even when I am now logged in as root. Is this anything with firewalls?
Hang on a minute: you're original message said the error was:
Warning: chmod() [function.chmod]: Permission denied in
/usr/local/apache/htdocs/file_linux.php on line 27
But you say you've re-installed, and done "chmod -R 777 var" and "chown -R
apache:apache ." in /var
A few things there:
When you are changing permissions and ownerships on such a large scale, you
should always use absolute paths to be sure you are doing the right thing - like
"chmod -R 777 /var" and "chown -R apache:apache /var"
Next, changing permission and ownership recursively on something like /var is
likely to wreck your system in weird and wonderful ways, and is pretty difficult
to undo - you might be looking at a total OS reinstall here (once you've solved
your Apache problems)
Finally, the error message refers to a file in /usr/local/apache/htdocs, but you
then are changing permissions in /var - where is your web root?! It looks like
your PHP code has the /usr/local/apache/htdocs path hard-coded, when your web
files are actually in /var/something...
I forgot to mention that I use Fedora on a Linux machine. I used yum install apache and yum install php to install my packages. Therefore, I don't have a /usr/local/apache/htdocs folder. The web root is now /var/www/html, which originally I do have /usr/local/apache/htdocs that I configured during previous installations. This is not there anymore after my reinstallations since yesterday.
Do I really have to reinstall the entire Fedora? I hate to say that my scripts worked fine BEFORE yesterday until the power went out and nothing went right after I have restarted the entire system.
Alice
You don't *have* to reinstall Fedora (yet) - that was just a warning that
changing ownership and permissions on /var might cause some problems later...
So the question is, does the error message say that it cannot change permissions on
/usr/local/apache/htdocs/file_linux.php
or
/var/www/html/file_linux.php
?
And does your PHP script have the correct path?
The original problem may just have been that the /usr/local file system was
mounted read-only after the power outage (perhaps due to some disk corruption
caused by the failure?). Since then you have reinstalled apache, but possibly
not in the place your PHP script expects it to be. That would be my first thing
to check...
This sounds really dumb, but it turned out that I have some inconsistencies going on in my httpd.conf file. Now I have changed both groups to daemon, and changed to owners as Rob suggested. Now it is finally working fine. Would I still need to change everything back to 0755? Or, should I ask, what is the appropriate permission I should be using here?
Alice
At least that explains why the problem arose from a power failure: you had some
new settings in the configuration which needed an apache restart to make them
happen, and when the server rebooted, apache picked up the new settings...
The problem is that if you did "chmod -R 777 /var", you changed every file /var
and ALL of its subdirectories to have 777 permissions, and there's not an easy
way of knowing what the permissions were on all of those files and directories.
While your system will probably work happily with everything in /var
world-writeable, it's not very safe (in a security sense).
If you also did something like "chown -R apache:apache /var" then you have lost
the ownership settings of all those files too, again with no easy way of undoing
that. In that case, setting ownership to 755 really will break things, because
then anything not running as apache will not be able to write to /var !
Some programs check the ownership and file permissions of the files they use,
and will refuse to work if they are wrong or insecure - that might be a problem
if your machine is used for more than just a PHP development server.
That's why I said you might need to re-install the OS.
Of course, you could always just restore /var from your system backup ;)
For now, I think that 777 permissions will probably be OK, but keep an eye out
for hackers...
--
Peter Ford, Developer phone: 01580 893333 fax: 01580 893399
Justcroft International Ltd. www.justcroft.com
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