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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 OSF1

line

line(1) 						      General Commands Manual							   line(1)

NAME

       line - Reads one line from standard input

SYNOPSIS

       line

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       line:  XCU5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

OPTIONS

       None

DESCRIPTION

       The  line  command  copies one line, up to and including a newline, from standard input and writes it to standard output.  Use this command
       within a shell command file to read from your terminal.	The line command always writes at least a newline character.

NOTES

       The line utility has no internationalization features and is marked LEGACY in XCU Issue 5. Use the read utility instead.

EXIT STATUS

       Success.  End-of-File.

EXAMPLES

       To read a line from the keyboard and append it to a file, enter: echo 'Enter comments for the log:' echo ': c' line >>log

       This shell procedure displays the message: Enter comments for the log:

       It then reads a line of text from the keyboard and adds it to the end of the file log.  The echo  ':  c'  command  displays  a	:  (colon)
       prompt.	See the echo command for information about the c escape sequence.

SEE ALSO

       Commands:  echo(1), ksh(1), read(1), Bourne shell sh(1b), POSIX shell sh(1p)

       Functions:  read(2)

       Standards:  standards(5)

																	   line(1)
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