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Full Discussion: Piping / Executing
Top Forums Shell Programming and Scripting Piping / Executing Post 302128243 by Shell_Life on Monday 23rd of July 2007 01:58:49 PM
Old 07-23-2007
If you want to execute each statement and check everytime if it is the
seventh hour, the following will create a 'Temp' shell script with all your
commands and a function 'f_test_time':
Code:
echo '#!/bin/ksh' > Temp
echo 'function f_test_time {}' >> Temp
echo 'typeset -i mDate' >> Temp
echo 'mDate=`date +"%H"`' >> Temp
echo 'if [ ${mDate} -eq 7 ]; then' >> Temp
echo 'echo "It is the seventh hour -- exiting."' >> Temp
echo 'exit' >> Temp
echo 'fi' >> Temp
echo '}' >> Temp
while read mLine
do
  echo $mLine >> Temp
  echo 'f_test_time' >> Temp
done < input_file

 

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LEARN ABOUT MOJAVE

test::trap::builder::systemsafe

Test::Trap::Builder::SystemSafe(3)			User Contributed Perl Documentation			Test::Trap::Builder::SystemSafe(3)

NAME

       Test::Trap::Builder::SystemSafe - "Safe" output layer backend using File::Temp

VERSION

       Version 0.2.3

DESCRIPTION

       This module provides an implementation systemsafe, based on File::Temp, for the trap's output layers.  This implementation insists on
       reopening the output file handles with the same descriptors, and therefore, unlike Test::Trap::Builder::TempFile and
       Test::Trap::Builder::PerlIO, is able to trap output from forked-off processes, including system().

       See also Test::Trap (:stdout and :stderr) and Test::Trap::Builder (output_layer).

CAVEATS

       Using File::Temp, we need privileges to create tempfiles.

       We need disk space for the output of every trap (it should clean up after the trap is sprung).

       Disk access may be slow -- certainly compared to the in-memory files of PerlIO.

       If the file handle we try to trap using this backend is on an in-memory file, it would not be available to other processes in any case.
       Rather than change the semantics of the trapped code or silently fail to trap output from forked-off processes, we just raise an exception
       in this case.

       If there is another file handle with the same descriptor (f ex after an "open OTHER, '>&=', THIS"), we can't get that file descriptor.
       Rather than silently fail, we again raise an exception.

       Threads?  No idea.  It might even work correctly.

BUGS

       Please report any bugs or feature requests directly to the author.

AUTHOR

       Eirik Berg Hanssen, "<ebhanssen@allverden.no>"

COPYRIGHT &; LICENSE
       Copyright 2006-2012 Eirik Berg Hanssen, All Rights Reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2017-10-06					Test::Trap::Builder::SystemSafe(3)
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