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Full Discussion: File permission
Operating Systems Linux Ubuntu File permission Post 302550508 by Corona688 on Friday 26th of August 2011 02:41:08 AM
Old 08-26-2011
You don't have to cd to do things. / in parameters isn't restricted.

Code:
nano path/to/file

mv /path/to/this path/to/that

This won't restrict him from editing things outside of drupal though. You could use user file ownership and permissions to do that.

Come to think of it, the whole "restrict to one directory" thing is a bit of a red herring for any operating system with relative and absolute paths. Any user can cd into /usr/, but can they edit files in there? Probably not. Any user can create files in /tmp/, but do they cd into /tmp/ when they do so? Probably not. cd is just a convenience, file permissions are what control the actual security.

Better to consider file ownership than what directory he's in. You could make him use a limited user where the drupal folder and things in it belong to his user. He could cd other places, but so what? He wouldn't be able to accomplish much by doing so.
Last edited by Corona688; 08-26-2011 at 03:53 AM..
 

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LEARN ABOUT HPUX

symlink

symlink(4)						     Kernel Interfaces Manual							symlink(4)

NAME

       symlink - symbolic link

DESCRIPTION

       A symbolic (or soft ) link is a file whose name indirectly refers (points) to a relative or absolute path name.

       During  path  name  interpretation,  a symbolic link to a relative path name is expanded to the path name being interpreted, and a symbolic
       link to an absolute path name is replaced with the path name being interpreted.

       Thus, given the path name

	      If is a symbolic link to a relative path name such as the path name is interpreted as

	      If is a symbolic link to an absolute path name such as the path name is interpreted as

       All symbolic links are interpreted in this manner, with one exception: when the symbolic link is the last component of a path name,  it	is
       passed  as  a  parameter  to  one of the system calls: or (see readlink(2), rename(2), symlink(2), unlink(2), chown(2) and lstat(2)).  With
       these calls, the symbolic link, itself, is accessed or affected.

       Unlike normal (hard) links, a symbolic link can refer to any arbitrary path name and can span different logical devices (volumes).

       The path name can be that of any type of file (including a directory or another symbolic link), and may be invalid if no such  path  exists
       in  the	system.   (It is possible to make symbolic links point to themselves or other symbolic links in such a way that they form a closed
       loop.  The system detects this situation by limiting the number of symbolic links it traverses while translating a path name.)

       The mode and ownership of a symbolic link is ignored by the system, which means that affects the actual file, but not the  file	containing
       the symbolic link (see chmod(1)).

       Symbolic links can be created using or (see ln(1) and symlink(2)).

AUTHOR

       was developed by HP and the University of California, Berkeley.

SEE ALSO

       cp(1), symlink(2), readlink(2), link(2), stat(2), mknod(1M).

																	symlink(4)
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