Hi all,

I am writing a shared library to intercept calls to open() (partly inspired by how tsocks works). What I want to do is redirect tho open() to a different file (depending on the input pathname). So, I intend to intercept it, change pathname as required and then call the real open().

I tried doing this, but since I define open(), I can't call the real open(). To avoid this, I thought of using dlopen(). Please see the (very short) code I've written to do this.

http://pastie.org/826380

It gives the following error

'Inconsistency detected by ld.so: dl-open.c: 643: _dl_open: Assertion `_dl_debug_initialize (0, args.nsid)->r_state == RT_CONSISTENT' failed!'

Can you suggest a fix or an alternate way of doing this?


Thanks in advance!
auli

Hi guys,

I was able to solve this problem.

The problem was that I needed to say
$ LD_PRELOAD=/lib/tls/i686/cmov/libdl.so.2:./libfile_io_intercept.so.1 open_example


Thanks,
auli

Edit:

Err.. It still doesn't work. I forgot that I had commented out my entire code when running :P

The error is generated at the "handle=dlopen();" line.

Solved by using RTLD_NEXT. Here is the code that works!

http://pastie.org/827447


auli