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Full Discussion: Right justifying prompt data in bash
Top Forums UNIX for Dummies Questions & Answers Right justifying prompt data in bash Post 302749123 by vnayak on Thursday 27th of December 2012 02:10:57 PM
Old 12-27-2012
Apple Right justify for bash
Hi fpmurphy,

Many thanks for the suggestion and your prompt reply. I did find a few resources on the web which may benefit people using the terminal.

These are below:

8 Useful and Interesting Bash Prompts

and

Add a Separator & Time Stamp Between Terminal Commands to Increase Readability

I than mixed the codes I found on these sites together to make something below:

Code:
 Fill with minuses
# (this is recalculated every time the prompt is shown in function prompt_command):

fill="--- "
reset_style='\[\033[00m\]'
status_style=$reset_style'\[\033[0;90m\]' # gray color; use 0;37m for lighter color
prompt_style=$reset_style
command_style=$reset_style'\[\033[1;29m\]' # bold black

# Prompt variable:

#PS1="$status_style"'$fill \t\n'"$prompt_style"'${debian_chroot:+($debian_chroot)}\u@\h:\w\$'"$command_style "
PS1='\n\[\e[32;1m\](\[\e[37;1m\]\u\[\e[32;1m\])-(\[\e[37;1m\]jobs:\j\[\e[32;1m\])-(\[\e[37;1m\]\w\[\e[32;1m\])$fill (\t)\n(\[\[\e[37;1m\]! \!\[\e[32;1m\])-> \[\e[0m\]`if [ $? = 0 ]; then echo \[\e[33m\]^_^\[\e[0m\]; else echo \[\e[31m\]O_O\[\e[0m\]; f$

# Reset color for command output
# (this one is invoked every time before a command is executed):

trap 'echo -ne "\033[00m"' DEBUG

function prompt_command {

        # create a $fill of all screen width minus the time string and a space:

        let fillsize=${COLUMNS}-32
        fill=""

        while [ "$fillsize" -gt "0" ]

        do

                fill="-${fill}" # fill with underscores to work on
                let fillsize=${fillsize}-1

        done

        # If this is an xterm set the title to user@host:dir

        case "$TERM" in

                xterm*|rxvt*)
                bname=`basename "${PWD/$HOME/~}"`
                echo -ne "\033]0;${bname}: ${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007"

        ;;
*)
;;
esac
}

PROMPT_COMMAND=prompt_command

I am by no means an expert Bash scripter however, once I started looking at the code I was able to roughly figure out how this worked. Obviously this code be improved upon but this serves my purpose for now.

Many thanks

vnayak
 

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LEARN ABOUT PLAN9

newuser

NEWUSER(8)						      System Manager's Manual							NEWUSER(8)

NAME

       newuser - adding a new user

SYNOPSIS

       rc /sys/lib/newuser

DESCRIPTION

       To  establish a new user on Plan 9, add the user's name to /adm/users by running the newuser command on the console of the file server (see
       users(6) and fs(8)).  Next, give the user a password using the changeuser  command  on  the  console  of  the  authentication  server  (see
       auth(8)).   At this point, the user can bootstrap a terminal using the new name and password.  The terminal will only get as far as running
       rc, however, as no profile exists for the user.

       The rc(1) script /sys/lib/newuser sets up a sensible environment for a new user of Plan 9.  Once the terminal is running rc, type

	      rc /sys/lib/newuser

       to build the necessary directories in /usr/$user and create a reasonable initial profile in /usr/$user/lib/profile.  The script	then  runs
       the  profile  which,  as  its last step, brings up 81/2(1).  At this point the user's environment is established and running.  (There is no
       need to reboot.)  It may be prudent at this point to run passwd(1) to change the password, depending on how the initial password  was  cho-
       sen.

       The profile built by /sys/lib/newuser looks like this:

	      bind -a $home/bin/rc /bin
	      bind -a $home/bin/$cputype /bin
	      font = /lib/font/bit/pelm/euro.9.font
	      switch($service){
	      case terminal
		   prompt=('term% ' '  ')
		   fn term%{ $* }
		   exec 81/2
	      case cpu
		   bind -b /mnt/term/mnt/81/2 /dev
		   prompt=('cpu% ' '   ')
		   echo -n $sysname > /dev/label
		   fn cpu%{ $* }
		   news
	      case con
		   prompt=('cpu% ' '   ')
		   news
	      }

       Sites may make changes to /sys/lib/newuser that reflect the properties of the local environment.

       Use the -c option of mail(1) to create a mailbox.

SEE ALSO

       passwd(1), 81/2(1), namespace(4), users(6), auth(8), fs(8)

																	NEWUSER(8)
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