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Full Discussion: how to get the variable in while loop outside of it?
Top Forums Shell Programming and Scripting how to get the variable in while loop outside of it? Post 302571239 by jjinno on Monday 7th of November 2011 12:31:39 AM
Old 11-07-2011
Here is a little BASH trick to avoid these problems...
Code:
#!/bin/bash

function myLoop()
{
  echo $1 |
  while read WORD
  do
    echo $WORD|egrep "[0-9]" 2>/dev/null 1>/dev/null
    RETVAL=$?

    echo "Something to the screen..." >&2
    echo $RETVAL
  done
}

echo RETVAL=$(myLoop $1)

The basic idea is to echo the value as a function output. This output can then be captured as whatever variable you want.
This User Gave Thanks to jjinno For This Post:
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LEARN ABOUT OPENSOLARIS

noecho

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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