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Full Discussion: Different behavour with "tr"
Top Forums Shell Programming and Scripting Different behavour with "tr" Post 302740071 by jville on Wednesday 5th of December 2012 01:01:30 PM
Old 12-05-2012
Different behavour with "tr"

I am getting different output with the 'tr' command in bash
I am using
Linux:
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
Bash version:
GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu)

Code:
$ x=`echo XXx | tr '[a-z]' '[A-Z]' `
$ echo $x
XXX

$ y=`echo XXx | tr [:lower:] [:upper:] `
$ echo $y
XXx

 

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echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME
echo, noecho - enable/disable terminal echo SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib -R /usr/xpg4/lib -lcurses [ library... ] c89 [ flag... ] file... -lcurses [ library... ] #include <curses.h> int echo(void); int noecho(void); DESCRIPTION
The echo() function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially, curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control soft- ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined. RETURN VALUES
Upon successful completion, these functions return OK. Otherwise, they return ERR. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5) SunOS 5.11 5 Jun 2002 echo(3XCURSES)
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