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Top Forums Shell Programming and Scripting how to exit status of a piped process ??? Post 302554314 by ashwini.engr07 on Sunday 11th of September 2011 12:41:23 PM
Old 09-11-2011
Hi,
Thanks Alister. I tried this. but it echoes blank.

I tried with simple commands at prompt and echoed $cmd_status like:
Code:
wc -k; echo $? > cmd_status

prints blank
Code:
(wc -k; echo $? > cmd_status)

prints blank
Code:
wc -k;cmd_status=$?

prints proper exit status (but this is not useful as it would not serve my purpose if i pipe after this Smilie)
Code:
(wc -k;cmd_status=$?)

prints blank

and yes i took care to clear $cmd_status after each try !
Strange!

Smilie
 

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PWD(1)							    BSD General Commands Manual 						    PWD(1)

NAME
pwd -- return working directory name SYNOPSIS
pwd [-LP] DESCRIPTION
The pwd utility writes the absolute pathname of the current working directory to the standard output. Some shells may provide a builtin pwd command which is similar or identical to this utility. Consult the builtin(1) manual page. The options are as follows: -L Display the logical current working directory. -P Display the physical current working directory (all symbolic links resolved). If no options are specified, the -P option is assumed. ENVIRONMENT
Environment variables used by pwd: PWD Logical current working directory. DIAGNOSTICS
The pwd utility exits 0 on success, and >0 if an error occurs. STANDARDS
The pwd utility conforms to IEEE Std 1003.1-2001 (``POSIX.1''). SEE ALSO
builtin(1), cd(1), csh(1), sh(1), getcwd(3) BUGS
In csh(1) the command dirs is always faster because it is built into that shell. However, it can give a different answer in the rare case that the current directory or a containing directory was moved after the shell descended into it. The -L option does not work unless the PWD environment variable is exported by the shell. BSD
February 4, 2002 BSD
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