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Top Forums Shell Programming and Scripting Setting a variable within if block Post 302345040 by Scott on Tuesday 18th of August 2009 09:26:43 AM
Old 08-18-2009
Quote:
Originally Posted by Franklin52
The pipe starts a new shell (child)
The script does work for me...

Code:
> cat Test
#!/bin/sh

touch hi
echo Outside $PPID $$
ls | while read input
do
if [ $input = "hi" ]
then
  echo Inside $PPID $$
  IS_VAR=1
  echo Inside $IS_VAR
  break
fi
done
  echo Output $PPID $$
echo Outside $IS_VAR
> ./Test
Outside 13426702 2252968
Inside 13426702 2252968
Inside 1
Output 13426702 2252968
Outside 1

Which OS are you using, Padmini?

Edit: Wow... It works on AIX but not on Linux or Solaris. I do apologise.

Last edited by Scott; 08-18-2009 at 10:37 AM..
 

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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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