Vaibhav Sibal wrote:
The scenario is, I made a login interface wherein i accept usernames
and passwords from users and after comparing them to a database I log
them in. The server runs Linux Fedora Core 2. Now I want to know
whether there can be a scenario wherein I can make the logged in user
have access to files of which he/she is the owner of or the file
belongs to a group whose membership he/she has. Is this possible ?
because as far as my knowledge goes, its only possible to give access
to users to specific files if the user logs in to a particular shell.
Please provide some help on this if you can. Thanks in advance !
You could compare their username that you are using to the username in
/etc/passwd and compare that to http://php.net/fileowner
If you control both /etc/passwd and the database, and have the usernames
synchronized, you could write your PHP script so that people can only
see or read the files owned by them.
With a bit more effort, you could also compare groups and group
permissions with http://php.net/filegroup
You would probably need http://php.net/exec and do something like:
$command = groups $username;
to find out what groups the user is a member of, and then go through
/etc/passwd to find out the group IDs and compare those to the output of
'filegroup'
So it *could* be done, but it will be a bit of work.
You may want to Google for PHP fileowner filegroup or similar and see if
there's an existing script out there for it.
http://phpclasses.org should be searched in particular.
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