Re: problems with nmap and libpcap on gentoo

[David Fifield <david () bamsoftware com>]

On Sat, Oct 10, 2009 at 10:52:39AM +0200, sara fink wrote:
> this is going so weird. I downgraded to nmap 5.00 instead of 5.00-r2.
> then I ran again emerge  =net-analyzer/nmap-5.00-r2
> after that
> ldd -d nmap
>         linux-gate.so.1 =>  (0xb7fd3000)
>         libpcre.so.0 => /lib/libpcre.so.0 (0xb7f81000)
>         libpcap.so.1 => /usr/lib/libpcap.so.1 (0xb7f4f000)
>         libssl.so.0.9.8 => /usr/lib/libssl.so.0.9.8 (0xb7f07000)
>         libcrypto.so.0.9.8 => /usr/lib/libcrypto.so.0.9.8 (0xb7db0000)
>         liblua.so.5 => /usr/lib/liblua.so.5 (0xb7d8a000)
>         libdl.so.2 => /lib/libdl.so.2 (0xb7d86000)
>         libstdc++.so.6 =>
> /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libstdc++.so.6 (0xb7c9c000)
>         libm.so.6 => /lib/libm.so.6 (0xb7c76000)
>         libgcc_s.so.1 => /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libgcc_s.so.1
> (0xb7c6a000)
>         libc.so.6 => /lib/libc.so.6 (0xb7b2d000)
>         /lib/ld-linux.so.2 (0xb7fd4000)
>
> as you can see, now it shows it is linked to libpcap.so.1
>
> BUT
>
> nmap
> nmap: error while loading shared libraries: libpcap.so.0: cannot open shared
> object file: No such file or directory
>
> and grep grep -r libpcap.so.1 nmap gives no result while
> grep -r libpcap.so.0 nmap
> Binary file nmap matches
>
> so this means that nmap was compiled with libpcap.so.0 and linked to
> libpcap.so.1.

All I can think of is that maybe you have more than one copy of nmap
installed, perhaps one in /usr/local/bin that is still linked with
libpcap.so.0. Try using the full pathname of nmap where Gentoo installs
it.

David Fifield

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