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Full Discussion: Uppercase to lowercase and vice versa
Top Forums Shell Programming and Scripting Uppercase to lowercase and vice versa Post 302508160 by danmero on Saturday 26th of March 2011 08:19:20 AM
Old 03-26-2011
Code:
# bash --version
GNU bash, version 4.1.9(2)-release (i386-portbld-freebsd7.3)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.


# cat script
#!/bin/bash
if [ ${#} -eq 0 ];then
        echo "Usage $0 [string]"
        exit
fi

for ((i=0;i<${#1};i++))
do
        char=${1:$i:1}
        case $char in
                [a-z]) new_string=${new_string}${char^};;
                [A-Z]) new_string=${new_string}${char,};;
                    *) new_string=${new_string}${char} ;;
        esac
done
echo In: \""$1"\"   Out: \""$new_string"\"

# /temp/script
Usage /temp/script [string]

# /temp/script "TeSt StR1Ng?"
In: "TeSt StR1Ng?" Out: "tEsT sTr1nG?"

 

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LEARN ABOUT SUSE

true

TRUE(1) 							   User Commands							   TRUE(1)

NAME

       true - do nothing, successfully

SYNOPSIS

       true [ignored command line arguments]
       true OPTION

DESCRIPTION

       Exit with a status code indicating success.

       --help display this help and exit

       --version
	      output version information and exit

       NOTE: your shell may have its own version of true, which usually supersedes the version described here.	Please refer to your shell's docu-
       mentation for details about the options it supports.

AUTHOR

       Written by Jim Meyering.

REPORTING BUGS

       Report true bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2009 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for true is maintained as a Texinfo manual.  If the info and true programs are properly installed at your site,  the
       command

	      info coreutils 'true invocation'

       should give you access to the complete manual.

GNU coreutils 7.1						     July 2010								   TRUE(1)
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