Russell Coker <russell@coker.com.au> writes:
On Tue, 25 Aug 2015 18:12:14 Sean Crosby wrote:
I'm not aware of one, but is there a way to redirect file open calls for /path1/file1 to /path2/file2 in a script? It only has to be for file open/read calls, and not write. The /path1 filesystem is not writeable by the user.
This is something that you could do with LD_PRELOAD. There's probably a module out there to do it already if you google it, but if not it's not that hard to write if you've good at C coding.
fakeroot(1) can do this, I think. LD_PRELOAD is one of the available strategies. As used by Debian to build packages, it basically says: Anytime you try to do something that's not allowed, I'll claim that I did it, and remember (inside myself) what was done, so if you e.g. install a file then read it, I'll act like it worked. But outside me, nothing has actually changed. It can persist its sate between runs. Ref. http://manpages.debian.org/cgi-bin/man.cgi?query=fakeroot