Color Underline and Bold letter in shell script Post: 302495969

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Top Forums Shell Programming and Scripting Color Underline and Bold letter in shell script Post 302495969 by cfajohnson on Friday 11th of February 2011 05:28:23 PM

02-11-2011

Registered User

Quote:

Originally Posted by mcagaurav

can I make this echo part of script in BOLD, UNDERLINE and give some color to this ?????

As I wrote in Chapter 14 of my book, Pro Bash Programming:
"Traditionally, screen manipulation is done through the termcap or terminfo database that supplies the information necessary to manipulate any of dozens or even hundreds of types of terminal. The shell interface to the database is an external command, tput.

On some systems, tput uses the termcap database; on others (mostly newer systems) it uses the terminfo database. The commands for the two databases are not the same, so a tput command written for one system may not work on another.

On one system, the command to place the cursor at the 20th column on the 10th row is:
Code:
tput cup 9 19
On another system, the command is:
Code:
tput cm 19 9
These commands will produce the correct output for whatever type of terminal is specified in the TERM variable. (Note: tput starts counting at 0.)

However, the plethora of terminal types has, for all intents and purposes, been reduced to a single, standard type. This standard, ISO 6429 (also known as ECMA-48, and formerly known as ANSI X3.64 or VT100), is ubiquitous, and terminals that do not support it are few and far between. As a result, it is now feasible to code for a single terminal type. One advantage of this homogeneity is that the necessary coding can be done entirely within the shell. There's no need for an external command."

The following codes gives you what you need:
Code:
## bold
printf '\e[1m'

## red foreground
printf '\e[31m'

## red background
printf '\e[41m'

## underline
printf '\e[4m'

## colours
  black=0
    red=1
  green=2
 yellow=3
   blue=4
magenta=5
   cyan=6
  white=7

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LEARN ABOUT FREEBSD

clear

TPUT(1) 						    BSD General Commands Manual 						   TPUT(1)

NAME

     tput, clear -- terminal capability interface

SYNOPSIS

     tput [-T term] attribute ...
     clear

DESCRIPTION

     The tput utility makes terminal-dependent information available to users or shell applications.  When invoked as the clear utility, the
     screen will be cleared as if
	   tput clear
     had been executed.  The options to tput are as follows:

     -T      The terminal name as specified in the termcap(5) database, for example, ``vt100'' or ``xterm''.  If not specified, tput retrieves the
	     ``TERM'' variable from the environment.

     The tput utility outputs a string for each attribute that is of type string; a number for each of type integer.  Otherwise, tput exits 0 if
     the terminal has the capability and 1 if it does not, without further action.

     If an attribute is of type string, and takes arguments (e.g. cursor movement, the termcap ``cm'' sequence) the arguments are taken from the
     command line immediately following the attribute.

     The following special attributes are available:

     clear	   Clear the screen (the termcap(5) ``cl'' sequence).

     init	   Initialize the terminal (the termcap(5) ``is'' sequence).

     longname	   Print the descriptive name of the user's terminal type.

     reset	   Reset the terminal (the termcap(5) ``rs'' sequence).

EXIT STATUS

     The exit status of tput is as follows:

     0	     If the last attribute attribute argument is of type string or integer, its value was successfully written to standard output.  If the
	     argument is of type boolean, the terminal has this attribute.

     1	     This terminal does not have the specified boolean attribute.

     2	     Usage error.

     3	     No information is available about the specified terminal type.

SEE ALSO

     termcap(5), terminfo(5)

STANDARDS

     The tput utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY

     The tput utility appeared in 4.4BSD.

BUGS

     The tput utility cannot really distinguish between different types of attributes.

     Some termcap entries depend upon having a '%' in them that is just a '%' and nothing more.  Right now we just warn about them if they do not
     have a valid type declaration.  These warnings are sent to stderr.

BSD
								   June 15, 2002							       BSD