Bash Files and Functions

Misc Functions

These were in my .bashrc at some point, or I put them in scripts, or what not. Now they're here.

# An example of a bash function which kills a particular process, in this case one with "xp -grabtime" in its name.
function killrsi {
    kill -9 $(ps -ux | grep 'xp -grabTime' | awk '/.*/{print $2}')
}

Some more useful scripts can be found in this file: moreusefulscripts.rar

They include a reasonably good word counter for tex files, better than detex anyway, a file which will help you set up your ssh keys so you don't always have to type in your password every time and bcalc, which lets you do maths from the bash prompt. Kinda like Google but not in a web browser.

My .bashrc File

It's good, it works, it's customised for me. If you want to use it you will need to change some things in it, but if you're anything like me you don't get a good .bashrc file (or a good .emacs file or anything else like that) by starting from scratch and writing your own. Instead you just hack it together, copying and pasting scraps from other people in and modifying it.

Oh, and for the record - this .bashrc did triple duty, cygwin on my laptop, NetBSD at my old university and Fedora at Oxford, so not all of it works at each place, some of it doesn't work anywhere and when I move it to a new machine I mostly just comment bits out and otherwise hack it up.

EDIT: Actually, it dates from the university I started my undergrad at, so some of it could be well redundant - they ran some version of Linux, I forget which, then it got ported to NetBSD etc. It's been around :)

# System wide functions and aliases
# Environment stuff goes in /etc/profile

if [ -z "$PROFILE_LOADED" -a -e /etc/profile ]; then
    . /etc/profile
fi

# Set no group or world access by default.
umask 077

# Mod history - don't keep consecutive duplicates, bg, fg or exit's,
# make it work if I have multiple shells open
export HISTIGNORE="&:[bf]g:exit"
export HISTSIZE=8000
export HISTFILESIZE=8000
export HISTCONTROL=erasedups # don't keep any duplicates...
export PROMPT_COMMAND='history -a'

# Some useful variables to make SSH etc easier
export MCSNS='USER@HOST - they're all like this'
export OXMNS='^^^^^^^'
export OXLNS='^^^^^^'
export PHILNS='^^^^^^'

# prevent huge coredumps
ulimit -c 0

export PATH=$PATH:~/bin:/cygdrive/c/Program\ Files/graphviz-2.12/bin:/cygdrive/c/Program\ Files/Java/jdk1.6.0_02/bin
export PYTHONPATH=~/bin

unset PROFILE_LOADED

# Global Aliases.
alias hs='history | grep $1'

alias ls='ls -lAF --color=auto'
alias df='df -h'
alias du='du -h'

alias sweep='rm -f *.aux *.bbl *.bak *.dvi *.log *.blg .*~ *.toc *.lot *.lof *.loa *~ \#*'

alias mcs="ssh $MCSNS "
alias mcsx="ssh -X $MCSNS"
alias oxm="ssh $OXMNS "
alias oxmx="ssh -X $OXMNS "
alias oxl="ssh $OXLNS "
alias oxlx="ssh -X $OXLNS "

# SVN Stuff
export SVN_EDITOR=emacs
export SVN_ROOT=svn+ssh:///users/chrf/svn-repo
#export SVN_ROOT=file:///home/Christo/svn-repo

# Prompt stuff.
# set_clock is not currently used, so comment it out for effiecency/error prevention
#function set_clock {
#	#  prompt_x is where to position the cursor to write the clock
#	let prompt_x=$(tput cols)-6
#	tput sc
#	tput cup 0 ${prompt_x}
#	tput setaf 4 ; tput bold
#	echo -n "["
#	tput setaf 1
#	echo -n "$(date +%H%M)"
#	tput setaf 4 ; tput bold
#	echo -n "]"
#	tput rc
#}


function set_prompt { 
	# Define Colours:
	local CYAN="\[\033[0;36m\]" # For the pwd
	local LIGHT_GRAY="\[\033[0;37m\]"
	local LIGHT_GREEN="\[\033[1;32m\]" # For the connection type - SSH
	local NO_COLOUR="\[\033[0m\]"
	local PURPLE="\[\033[1;35m\]" # For the connection type - telnet
	local RED="\[\033[1;31m\]" # For user type - root
	local WHITE="\[\033[1;37m\]" # For user type - non-root
	local YELLOW="\[\033[1;33m\]" # For the time
	local BLUE="\[\033[1;34m\]" # For the connection type - local

	# Currently Unused Colours:
	local GRAY="\[\e[1;30m\]"	
	local GREEN="\[\033[0;32m\]"
	local BROWN="\[\033[0;33m\]"
	local LIGHT_CYAN="\[\033[1;36m\]"

	# Build the clock/time this prompt was generated:
	#local CLOCK="$YELLOW$(date +%H%M)$LIGHT_GRAY"

	# Assemble full, colour-coded path to pwd
	if [ "${PS1+set}" = set ]; then
    		#local CURDIR='${PWD}' # Replaces ~ with real path
		local CURDIR='\w' # Uses ~ rather than full path
		local DIR="$CYAN\[\]$CURDIR\[\]$NO_COLOUR"
	fi

	# Assemble username and host, colour code by name and connection type:
	# Many thanks to the Bash Prompt Howto :)
	# User Name:
	#	Red for root
	#	White for user logins
	# Host Name:
	#	Green for ssh connection
	#	Purple for telnet connection
	#	Blue for local connection

	# Figure out how we are connected:
	#local THIS_TTY=tty`ps aux | grep $$ | grep bash | awk '{ print $7 }'`
	#local SESS_SRC=`who | grep $THIS_TTY | awk '{ print $6 }'`

	SSH_FLAG=0

	SSH_IP=`echo $SSH_CLIENT | awk '{ print $1 }'`
	if [ $SSH_IP ] ; then
	 	SSH_FLAG=1
	fi

	SSH2_IP=`echo $SSH2_CLIENT | awk '{ print $1 }'`
	if [ $SSH2_IP ] ; then
	  	SSH_FLAG=1
	fi

	if [ $SSH_FLAG -eq 1 ] ; then
		CONN=ssh
	elif [ -z $SESS_SRC ] ; then
	  	CONN=lcl
	elif [ $SESS_SRC = "(:0.0)" -o $SESS_SRC = "" ] ; then
	  	CONN=lcl
	else
	  	CONN=tel
	fi

	# Assemble Hostname String:
	if [ $CONN = ssh ] ; then
		HOST="$LIGHT_GREEN\h$NO_COLOUR"
	elif [ $CONN = lcl ] ; then
		HOST="$BLUE\h$NO_COLOUR"
	elif [ $CONN = tel ] ; then
		HOST="$PURPLE\h$NO_COLOUR"
	fi

	# Okay...Now who we be?
	# Assemble username string in this if statement - could be done above, 
	# but for now it's ok.
	if [ `/usr/bin/whoami` = "root" ] ; then
	  	USR=priv
		USER="$RED\u$NO_COLOUR"
	else
	 	USR=nopriv
		USER="$WHITE\u$NO_COLOUR"
	fi

	# Set Titlebar:
	case $TERM in
	    xterm*|rxvt*)
	        local TITLEBAR='\[\033]0;\u@\h : ${PWD}\007\]' #Optionally, replace ${PWD} with \w
	        ;;
	    *)
	        local TITLEBAR=""
	        ;;
	esac



	# The work is done, now we merely  put it together:
	#PROMPT_COMMAND=set_clock

	# Original PS1:
	#PS1="$TITLEBAR[$YELLOW\D{%H%M}$LIGHT_GRAY][$USER@$HOST $DIR]\\$ "
	# Make PS1 multi-line for clarity/long paths
	PS1="
$TITLEBAR[$YELLOW\D{%H%M}$LIGHT_GRAY][$USER@$HOST $DIR] 
$ "

	PS2="> "
	PS3="+ "
}



function nethack {
    emacs ~/nethacknotes.txt &
    ssh nethack@aphasic.com
}



# Function from Philip Dowie
function em() {
  case $1 in
    # if we have no parameters, we want a blank window
    "")
    if jobs %emacs 2> /dev/null
    then 
      emacsclient --no-wait nullfile
    else 
      emacs &
      sleep 5
    fi ;;
    *) 
  if jobs %emacs 2> /dev/null
  then 
    emacsclient --no-wait "$1"
  else 
    emacs "$1" &
    sleep 5
  fi ;;
  esac
}



# Function to scp something to Sage box at Phil's:
function scpp() {
    scp $1 DELETED-FOR-PUBLIC:~/share/$1
}



# Function to print 1 up at MCS - uses scribble-2up
function mcslp() {
    scp $1 $MCSNS:~/$1
    mcs lpr1 $1 -Pscribble-2up
    mcs rm $1
}



# My external hard drive mounting stuff:
function hddm {
    mount f: ~/hdd/big
    mount g: ~/hdd/small
    mount h: ~/hdd/med
}

function hddu {
    umount ~/hdd/big
    umount ~/hdd/small
    umount ~/hdd/med
}



# Make latex quicker:
function latexc {
    latex $1
    bibtex $1
    latex $1
    latex $1
    dvips $1.dvi
    gv $1.ps
}



# Call set_prompt function
set_prompt
shopt -s histappend
shopt -s cdspell

. /etc/bash_completion

# MCS Stuff
#need postgresql
#need java2-latest
#need sgegrid

nix/mybashrc.txt · Last modified: 020071207 1545 by christo

Index

Bash Files and Functions

Misc Functions

My .bashrc File