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Full Discussion: Set User ID Bit And Shared Object
Top Forums Programming Set User ID Bit And Shared Object Post 302299106 by vpatil on Thursday 19th of March 2009 08:08:02 AM
Old 03-19-2009
Set User ID Bit And Shared Object
I have one app binary 'main' which is dependent on shared object libfoo.so
owner of main and libfoo.so is user 'oracle:dba'

> ldd main
libfoo.so => ./libfoo.so
libCstd.so.1 => /usr/lib/libCstd.so.1
libCrun.so.1 => /usr/lib/libCrun.so.1
libm.so.2 => /lib/libm.so.2
libc.so.1 => /lib/libc.so.1

Also I have one shell script 'back.sh' which invokes 'main' binary
Owner of this script is user oracle:dba and this script also as a set user ID bit set.

> ls -l back.sh
-rwsrwx--- 1 oracle dba 120 Mar 19 15:02 back.sh

> cat back.sh
#!/bin/sh
LD_LIBRARY_PATH=/app/lib; export LD_LIBRARY_PATH
/app/bin/main

Now I have one more user oraback:dba. who wants to execute this shell script. but every time he tries to execute 'back.sh' he is getting following error.

> ./back.sh
ld.so.1: main: fatal: libfoo.so: open failed: No such file or directory
Killed

Basically when script is excecuted by 'oraback' user main binary is failing to lolate its dependant shared objects .
Please let me know if you know the solution .

Thanks,
Vijay
 

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LEARN ABOUT DEBIAN

ligcc

LIGCC(1)							 Listaller Project							  LIGCC(1)

NAME

       ligcc - Wrapper around gcc to create more portable apps

SYNOPSIS

       ligcc [OPTION ...]

DESCRIPTION

       This manual page documents briefly the ligcc command.

       ligcc is a wrapper around gcc. It allows you to create more portable executables by doing three things:

       o   Forces the linker to link against older glibc symbols. Users who are using an older version of glibc will no longer get "undefined
	   symbol GLIBC_2.4 in /lib/libc.so"-style error messages.

       o   Allows you to easily statically link to any other library.

       o   Automatically removes bogus dependancies. For example, your program uses libfoo. libfoo uses libpng internally, but your app does not.
	   Yet the pkg-config file for libfoo specifies "-lfoo -lpng" is linker parameters. And tadaa - you now have a bogus dependancy on libpng!
	   LiGCC automatically removes the -lpng for you if your app doesn't use libpng directly.

       o   Add $ORIGIN/../lib to the binary's library search path. $ORIGIN is the directory in which the binary exists. This ensures that your
	   binary can find library dependencies which are placed in the 'lib' folder under the same prefix. You might want to install custom
	   libraries into /lib. If you set $APBUILD_PROJECTNAME, ligcc will also add $ORIGIN/../lib/$APBUILD_PROJECTNAME to the library search
	   path.

OPTIONS

       See the manpage of gcc(1) for more information about possible options.

       There are also several environment variables available to modify ligcc's behavior check the documentation for more information.

SEE ALSO

       lig++ (1), gcc(1).

       Additional documentation can be found on http://listaller.tenstral.net.

AUTHOR

       This manual page was written by Matthias Klumpp matthias@tenstral.net.

COPYRIGHT

       Copyright (C) 2009-2012 Matthias Klumpp

Listaller Project						   20 April,2012							  LIGCC(1)
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