When you need to check if FreeBSD ports contain a specific software, one needs to either use "find /usr/ports" or make use of the "make" utility.

Searching for bash in FreeBSD ports:
# make -C /usr/ports/ search key=bash | grep -vE "B-deps|R-deps" | less
...
Port: tuntun-0.4.0_3
Path: /usr/ports/security/tuntun
Info: A Gnome applet gui for OpenVPN
Maint: anderson@cnpm.embrapa.br
WWW: http://code.google.com/p/tuntun/

Port: unssh-1.4
Path: /usr/ports/security/unssh
Info: Fast way to delete entries from OpenSSH known_hosts file
Maint: ...

Whenever you need to know what package installed a specific file in FreeBSD, "pkg_info" can be used.




This is how to list files installed by pixman package:
# pkg_info -L ...

After you have updated your ports system and also it's index, you can check which packages have updates using "pkg_version" utility.

Fist, relevant "man pkg_version" info:

FeeBSD list installed packages

How to list installed software packages in FreeBSD.

When compiling ssldump on freebsd, the configure script uses stock bpf.h header file instead of the libpcap one.


===> Building for ssldump-0.9b3_4
cc -O2 -pipe -funroll-loops -fno-strict-aliasing -march=pentium4 -O2 -pipe -funroll-loops -fno-strict-aliasing -march=pentium4 -DHAVE_LIBM=1 -DHAVE_SYS_TIME_H=1 -DSTDC_HEADERS=1 -DTIME_WITH_SYS_TIME=1 -DSIZEOF_UNSIGNED_SHORT=2 -DSIZEOF_UNSIGNED_INT=4 -DSIZEOF_UNSIGNED_LONG=4 -DSIZEOF_UNSIGNED_LONG_LONG=8 -DRETSIGTYPE=void -DHAVE_VPRINTF=1 -DHAVE_STRDUP=1 -c -o pcap-snoop.o ./base/pcap-snoop.c -DOPENSSL -I./base/ -I./null/ -I./ssl/ -Icommon/include/ -I./null/ -I./ssl/ -I/usr/local/include
In file included from ./base/pcap-snoop.c:52:
/usr/include/net/bpf.h:63: error: redefinition of `struct bpf_program'
/usr/include/net/bpf.h:87: error: redefinition of `struct bpf_version'
/usr/include/net/bpf.h:596: error: ...

It can happen that nemesis installation to fail because the configure script cannot find libnet. THis is not nemesis's fault, it's the admin's fault (mine and yours :D ).
Nemesis configure script error:

ffmpeg: error while loading shared libraries: libavdevice.so.52: cannot open shared object file: No such file or directory

After installling ffmpeg on CentOS 4.8 the above error apears when running ffmpeg for the first time.

Running ldd utility shows that ffmpeg binary is dynamically linked to libraries which cannot be found:
# ldd `which ffmpeg`
libavdevice.so.52 => ...

I was trying to compile FFMPEG rev 24953 (27-08-2010) on CentOS 4.8 and following error occured:

[root@server ffmpeg]# make
CC libavdevice/alldevices.o
CC libavdevice/avdevice.o
CC libavdevice/dv1394.o
CC libavdevice/oss_audio.o
CC libavdevice/v4l.o
In file included from libavdevice/v4l.c:34:
/usr/include/linux/videodev.h:56: error: expected specifier-qualifier-list before ‘ulong’
libavdevice/v4l.c: In function ‘grab_read_header’:
libavdevice/v4l.c:136: error: ‘struct video_tuner’ has no member named ‘mode’
libavdevice/v4l.c:138: error: ‘struct video_tuner’ has no member named ‘mode’
libavdevice/v4l.c:140: error: ‘struct video_tuner’ has no member named ‘mode’
make: *** [libavdevice/v4l.o] Error ...