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Top Forums Shell Programming and Scripting How to get return value from C program and logs to file Post 302172953 by yhacks on Wednesday 5th of March 2008 06:50:56 AM
Old 03-05-2008
How to get return value from C program and logs to file

Hi, I have written scritp which prints output from the executable to standard output as well as in a file. Here "add" is an c executable which returns
some value based on inputs.

But if tee is not used "$?" returns the return value from add exe.
If tee is used it is simply retuning 0.

echo "Running program output"
myLine="./add 1 11"
`expr "$myLine"`| tee outputfile
echo "Succ/Fail : $?"
 

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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/> Report tee translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 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 8.5 February 2011 TEE(1)
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