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Full Discussion: Need output of script on screen and file with correct return status of the called script.
Top Forums Shell Programming and Scripting Need output of script on screen and file with correct return status of the called script. Post 302925102 by Prathmesh on Friday 14th of November 2014 03:06:15 AM
Old 11-14-2014
Quote:
Originally Posted by Corona688
This is really the preferred way to do it -- from the outside. Complicated schemes with pipes, tees, and fifos are liable to break down, subject to deadlocks, and can make your script dependent on a terminal: Untrustworthy and not worth the trouble. Even 99% success is not good enough. Putting in pipes also messes up the ordering, increases overhead manyfold, and can screw up your terminal prompt afterwards.

When redirecting it from the outside through tee, since you are using BASH, just check the script's return status in PIPESTATUS:

Code:
$ true | false | true | false
$ echo "${PIPESTATUS[0]} ${PIPESTATUS[1]} ${PIPESTATUS[2]} ${PIPESTATUS[3]}"
0 1 0 1

$

Code:
command 2>&1 | tee -a logfile
if [[ "${PIPESTATUS[0]}" -ne 0 ]]
then
        echo "command had an error"
fi

PIPESTATUS is even updated for a single command, so ${PIPESTATUS[0]} remains safe either way, as long as you're using BASH.
Thanks Corona688.
RudiC did recommend me PIPESTATUS, but I was not sure how to use it.

I was able to get exit status of sh 1.sh result with the help of PIPESTATUS and using tee is helping me to show output on screen and saving in the file.
Code:
sh 1.sh 2>&1 | tee -a ./2.log
echo "Pipestatus1 : ${PIPESTATUS[0]}, Pipestatus2: ${PIPESTATUS[1]}" | tee -a ./2.log

Again, many thanks to RudiC,gandolf989,sea and Corona688 for your help.
 

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LEARN ABOUT SUSE

tee

TEE(1)								   User Commands							    TEE(1)

NAME

       tee - read from standard input and write to standard output and files

SYNOPSIS

       tee [OPTION]... [FILE]...

DESCRIPTION

       Copy standard input to each FILE, and also to standard output.

       -a, --append
	      append to the given FILEs, do not overwrite

       -i, --ignore-interrupts
	      ignore interrupt signals

       --help display this help and exit

       --version
	      output version information and exit

       If a FILE is -, copy again to standard output.

AUTHOR

       Written by Mike Parker, Richard M. Stallman, and David MacKenzie.

REPORTING BUGS

       Report tee bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2009 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full  documentation  for tee is maintained as a Texinfo manual.  If the info and tee programs are properly installed at your site, the
       command

	      info coreutils 'tee invocation'

       should give you access to the complete manual.

GNU coreutils 7.1						     July 2010								    TEE(1)
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