Ayúdame a determinar qué se ejecuta cuando abro una nueva ventana de Terminal

Noté que cuando inicié una ventana de Terminal por accidente y traté de cerrarla rápidamente presionando la X en la ventana, obtuve un cuadro de diálogo como este:

"Closing this window will terminate the running processes: login, bash, bash, perl."

Mi computadora estaba bajo una carga pesada en ese momento y lenta. Pulsé Cancelar, y lo intenté de nuevo, se cerró silenciosamente.

Esto me lleva a creer que hay un script de Perl que se carga cada vez que inicio mi terminal. No he podido volver a crear el problema hasta ahora. ¿Cómo puedo verificar exactamente qué scripts se ejecutan cuando abro la Terminal?

1 /etc/profile

# System-wide .profile for sh(1)

if [ -x /usr/libexec/path_helper ]; then
    eval '/usr/libexec/path_helper -s'
fi

if [ "${BASH-no}" != "no" ]; then
    [ -r /etc/bashrc ] && . /etc/bashrc
fi

2 ~/.profile
(just user defined aliases)

3 ~/.bash_profile

    # Setting PATH for MacPython 2.5
    # The orginal version is saved in .bash_profile.pysave
    PATH="/Library/Frameworks/Python.framework/Versions/Current/bin:${PATH}"
    export PATH

    test -r /sw/bin/init.sh && . /sw/bin/init.sh

    ##
    # Your previous /Users/USERNAME/.bash_profile file was backed up as /Users/USERNAME/.bash_profile.macports-saved_2010-04-04_at_17:07:45
    ##

    # MacPorts Installer addition on 2010-04-04_at_17:07:45: adding an appropriate PATH variable for use with MacPorts.
    export PATH=/opt/local/bin:/opt/local/sbin:$PATH
    # Finished adapting your PATH environment variable for use with MacPorts.


    # MacPorts Installer addition on 2010-04-04_at_17:07:45: adding an appropriate MANPATH variable for use with MacPorts.
    export MANPATH=/opt/local/share/man:$MANPATH
    # Finished adapting your MANPATH environment variable for use with MacPorts.

#Add Some Color to "ls"
    export CLICOLOR=1
    export LSCOLORS=ExFxCxDxBxegedabagacad

    ##
    # Your previous /Users/USERNAME/.bash_profile file was backed up as /Users/USERNAME/.bash_profile.macports-saved_2011-09-23_at_23:15:01
    ##

    # MacPorts Installer addition on 2011-09-23_at_23:15:01: adding an appropriate PATH variable for use with MacPorts.
    export PATH=/opt/local/bin:/opt/local/sbin:$PATH
    # Finished adapting your PATH environment variable for use with MacPorts.

    # My Aliases
    (REMOVED ALIASES)

    4 ~/.bashrc
(FILE DOESN'T EXIST)