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Full Discussion: Append color in shell script for output
Top Forums Shell Programming and Scripting Append color in shell script for output Post 302601642 by Chubler_XL on Friday 24th of February 2012 06:03:40 AM
Old 02-24-2012
27 is the ascii value of the ESC character

The awk program pre-pends <ESC>[41m (VT100 set red rackground)
and appends <ESC>[0m (VT100 reset to normal output).

You can try it out yourself on a xterm/vt* terminal with:

Code:
awk 'BEGIN { printf("%c[41m%s%c[0m\n", 27, "Testing", 27); }'

The above will print Testing with red background.
 

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LEARN ABOUT OSX

pcsctest

PCSCTEST(8)							    User Manual 						       PCSCTEST(8)

NAME

       pcsctest

SYNOPSIS

       pcsctest

DESCRPTION

       pcsctest runs a test on pcscd, lists the readers currently connected, and displays card information if a card is inserted.

OPTIONS

       None

USAGE

       pcsctest  lists	the currently connected readers and asks the user to choose one.  After choosing the reader, pcsctest will ask the user to
       insert a card into the card reader.  If this happens pcsctest will display the cards's ATR and other information.

       Example:

       The following will occur if no reader is inserted and recognized:

       MUSCLE PC/SC Lite Test Program

	 Testing SCardEstablishContext	  : Command successful.
	 Testing SCardGetStatusChange

       Once a reader is inserted and recognized the following will occur:

	 MUSCLE PC/SC Lite Test Program

	 Testing SCardEstablishContext	  : Command successful.
	 Testing SCardGetStatusChange
	 Please insert a working reader   : Command successful.
	 Testing SCardListReaders	  : Command successful.
	 Reader 01: SCM SCR-331 CCID 0 0
	 Enter the reader number	  : 1

	 Waiting for card insertion
					  : Command successful.
	 Testing SCardConnect		  : Command successful.
	 Testing SCardStatus		  : Command successful.
	 Current Reader Name		  : CCID USB Reader 0 0
	 Current Reader State		  : 34
	 Current Reader Protocol	  : 0
	 Current Reader ATR Size	  : 9
	 Current Reader ATR Value	  : 3B E2 00 00 04 03 00
	 Testing SCardDisconnect	  : Command successful.
	 Testing SCardReleaseContext	  : Command successful.

	 PC/SC Test Completed Successfully !

SEE ALSO

       pcscd(8)

BUGS

MacOSX								    March 2003							       PCSCTEST(8)
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