Date: Wed, 12 Aug 1998 08:18:51 -0700 (PDT) From: patl@phoenix.volant.org To: flygt@sr.se Cc: FreeBSD Questions <questions@FreeBSD.ORG> Subject: Re: BASH prompt question Message-ID: <ML-3.3.902935131.4803.patl@asimov> In-Reply-To: <19980803213618.C11549@sr.se>
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> > > > > I would like to make my bash prompt show a little more info, like
> > > > > what dir the user is in. How would I do this?
>
> ...
>
> > PS1='\u@\h:`pwd -P` \$ '
>
> > \$ will be replaced with uid==0 ? '#' : '$'
>
> I often find that to be a little too long prompt. If one puts in a \W
> after the h: only the rightmost part of the path is visible.
> Something like: PS1='\u@\h: \W \\$ '
Since I'm usually using some form of X11-based terminal emulator,
I prefer to keep the prompt short and of a (relatively) fixed length.
When using an emulator that supports color, I use:
: ${USER:=$(/usr/ucb/whoami)}
export USER
PS1="\[\033[1;34m\]$USER@\h.\!>\[\033[30m\] "
This will put the login name, hostname, and history entry number
followed by a right broket (greater than sign), in blue. (I use
red for root.) Without color support the PS1 line reduces to:
PS1="$USER@\h.\!> "
I keep track of the path in the window's titlebar. (This requires
a window manager that let's you change the titlebar text. Most of
the ones I've tried do; but not all.) Since I've been doing this
for a while, on a variety of machines and OSes, the code to set it
up is a bit more baroque than strictly necessary:
if [ "$PS1" != "" ] ; then
function setup_window_frobbery {
# We can't do terminal-specific things when running under the
# CDE Display Manager
if [ -z "$DT" ] ; then
# Set the terminal to full eight-bit mode for the Meta-shift keys.
# In case we are running in a terminal emulator that loses the
# tty settings. Of course, we lose if the terminal really can't
# handle 8bit data; but how often will we be doing that?
#
if [ $OS_MAJOR_VERSION = 5 ] ; then
/bin/stty -markp -parenb -istrip cs8
else
/bin/stty pass8
fi
fi
host=$(uname -n)
# Stripe has to be a function because it is referenced from
# functions. Functions do not perform internal alias
# substitution. (It could be a variable, but it might
# be expanded during function definition instead of during
# execution, and why clutter the environment with it? )
if test -s /usr/bin/stripe ; then
# Export PWD because without it in the environment
# /usr/bin/stripe segfaults.
function stripe { /usr/bin/stripe $* ; }
export PWD
else
function stripe {
# I kind of hate to spawn a perl every time this is run;
# but there is no builtin way to convert the initial
# directory qualifiers back to a tilde when somewhere
# under the home directory.
#
local Pwd=$(perl -e '$_=$ENV{"PWD"};s:^$ENV{"HOME"}:~:;print')
#label "Commands: $USER @ $host - $Pwd"
label "$USER @ $host - $Pwd"
}
fi
if [ `uname -s` = "IRIX" ] ; then
# Correct some brain-damaged default key bindings
stty intr ^c quit ^\\
fi
# Different terminal emulators take slightly different escape
# sequences for the title-bar and icon label functions.
# Ain't standards wunnerful?
#
if [ "$TERM" = "iris-ansi" ] ; then
# DCS = ESC P or octal 220
# ST = ESC backslash or octal 234
function label { builtin echo -ne "\2201.y$*\234" ; }
function label-icon { builtin echo -ne "\2203.y$*\234" ; }
elif [ "$TERM" = "xterm" ] ; then
# This sequence changes both the title bar and the icon...
function label {
builtin echo -ne "\033]0;$*\007"
}
function label-icon {
:
}
else
# Sun shelltool/cmdtool, NeWS ANSIterm/jet, etc.
#
function label { builtin echo -ne "\033]l$*\033\\" ; }
function label-icon { builtin echo -ne "\033]L$*\033\\" ; }
#function label {
# perl -e 'print "\033]l'"$*"'\033\\";'
#}
#function label-icon {
# perl -e 'print "\033]L'"$*"'\033\\";'
#}
fi
function cd { builtin cd "$@" ; stripe ; }
function pushd { builtin pushd "$@" ; stripe ; }
function popd { builtin popd "$@" ; stripe ; }
function pwd { builtin pwd ; stripe ; }
function suspend { builtin suspend ; stripe ; }
function resize { builtin echo -ne "\033[;$1;$2t" ; }
function su {
# local IN_SU=$PWD ;
# local OLD_HISTFILE=$HISTFILE
# unset HISTFILE
# Ensure that the title-bar has some indication that we have
# changed users, even if the new user doesn't update it.
label "[ SU $* ] @ $host"
# We want HOME, USER, etc. to be set appropriately for
# root rather than inherited. Unfortunatly, the Sun
# standard su has no way to do this and still retain
# anything from the old environment (including current
# working directory...)
#
# NOTE: This really should check the parameters to
# determine how to set USER, HOME, etc.
#
/usr/bin/env - HOME=/ USER=root DISPLAY=$DISPLAY TERM=$TERM
IN_SU=$PWD /usr/bin/su $*
# if [ -n "$HISTFILE" ] ; then
# declare -x HISTFILE=$OLD_HISTFILE
# fi
stripe
}
function rlogin {
label-icon "[$1]"
# /usr/ucb/rlogin $*
command rlogin $*
stripe ;
label-icon "[$host]"
}
}
# The following depends upon the precedence in the expr man page:
# string-match -> * / % -> inequalities -> & -> |
#
# WINDOW_PARENT is SunView specific - it isn't there
# for `openwin -nosunview'.
#
# DISPLAY is X11 or X/NeWS specific.
#
if [ \( \
\( "$WINDOW_PARENT" \!= "" \) -o \
\( "$DISPLAY" \!= "" \) \
\) -a \( \
\( "$TERM" = "sun" \) -o \
\( "$TERM" = "sun-cmd" \) -o \
\( "$TERM" = "xterm" \) -o \
\( "$TERM" = "dtterm" \) -o \
\( "$TERM" = "vt100" \) -o \
\( "$TERM" = "iris-ansi" \) \
\) ]
then
#if tty=$(tty) ; then
# Use unique history file for each window.
# HISTFILE=$HOME/.dotfiles/.bash_history$DOTHOST.$(tty | cut -d/
-f3)
HISTFILE=$HOME/.dotfiles/.bash_history$DOTHOST.$(tty | cut -d/
-f3,4 | tr -d /)
if test "$tty" \!= "/dev/console" ; then
setup_window_frobbery
fi
#fi
unset tty
fi
fi
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