Using color in scripts Post: 303033773

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Operating Systems Linux Ubuntu Using color in scripts Post 303033773 by wisecracker on Thursday 11th of April 2019 01:34:29 PM

04-11-2019

Registered User

Some of these terminal escape codes even 'tput' can't do.
All work on CygWin's 'mintty' terminal too.

Code:

#!/bin/sh

# For those that do not have tput.
# Some of these cannot even be done using tput!
# All work on the majority of terminals but some terminals can't do them all.

# Resize the terminal on the fly, even works on CygWin's mintty, this resizes to 30 rows by 86 columns.
echo "Resize terminal to 30 x 86."
printf "%b" "\033[8;30;86t"
sleep 2
# And resize to a standard size of 24 rows by 80 columns.
echo "Resize terminal to 24 x 80."
printf "%b" "\033[8;24;80t"

# Reset terminal for machines that do not have it.
echo "Reset the terminal."
sleep 2
printf "%b" "\033c\033[0m\033[2J\033[H"

# Clear the screen.
echo "Clear the screen."
sleep 1
printf "%b" "\033[2J\033[H"
echo "Alternate clear screen."
sleep 1
# OR...
printf "%b" "\033[2J\033[1;1f"

# Clear the terminal current buffer only.
printf "%b" "\033[3J"

# Write into the terminal title bar.
printf "%b" "\033]0;Barry Walker.\007"
sleep 2
# And clear it again.
printf "%b" "\033]0;\007"

Enjoy lads and lassies...

Last edited by wisecracker; 04-11-2019 at 02:45 PM..

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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