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Full Discussion: while read line
Top Forums Shell Programming and Scripting while read line Post 302429151 by timber333 on Sunday 13th of June 2010 06:31:08 AM
Old 06-13-2010
while read line
Hi,

I have this type of bash code:

Code:
#!/bin/bash
while read -r line; do
  echo $line | /usr/local/example/program.sh
done

My question is, why if I put an echo statement inside the while loop it does not execute such as this:

Code:
while read -r line; do
 echo $line > file #this doesn't work
  /bin/echo $line | /usr/local/example/program.sh #this works
done

Yet, program.sh does process the $line.

For the record I am executing the script like this in shell terminal:
Code:
echo "statement" | /usr/local/programs/input.sh

What black magic is this?
Last edited by Scott; 06-13-2010 at 07:56 AM.. Reason: Please use code tags
 

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LEARN ABOUT SUNOS

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 5.10							    5 Jun 2002							    echo(3XCURSES)
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