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Shell Programming and Scripting
shell test command
Post 302269977 by foottuns on Friday 19th of December 2008 08:43:18 AM
12-19-2008
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Hi everyone,
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] then
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This is the code:
while test 1 -eq 1
do
read a
$a
if test $a = stop
then
break
fi
done
I read a command on every loop an execute it.
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LEARN ABOUT LINUX
annotate-output
ANNOTATE-OUTPUT(1) General Commands Manual ANNOTATE-OUTPUT(1) NAME
annotate-output - annotate program output with time and stream SYNOPSIS
annotate-output [options] program [args ...] DESCRIPTION
annotate-output will execute the specified program, while prepending every line with the current time and O for stdout and E for stderr. OPTIONS
+FORMAT Controls the timestamp format, as per date(1). Defaults to "%H:%M:%S". -h, --help Display a help message and exit successfully. EXAMPLE
$ annotate-output make 21:41:21 I: Started make 21:41:21 O: gcc -Wall program.c 21:43:18 E: program.c: Couldn't compile, and took me ages to find out 21:43:19 E: collect2: ld returned 1 exit status 21:43:19 E: make: *** [all] Error 1 21:43:19 I: Finished with exitcode 2 BUGS
Since stdout and stderr are processed in parallel, it can happen that some lines received on stdout will show up before later-printed stderr lines (and vice-versa). This is unfortunately very hard to fix with the current annotation strategy. A fix would involve switching to PTRACE'ing the process. Giving nice a (much) higher priority over the executed program could however cause this behaviour to show up less frequently. The program does not work as well when the output is not linewise. In particular, when an interactive program asks for input, the question might not be shown until after you have answered it. This will give the impression that the annotated program has hung, while it has not. SEE ALSO
date(1) SUPPORT
This program is community-supported (meaning: you'll need to fix it yourself). Patches are however appreciated, as is any feedback (posi- tive or negative). AUTHOR
annotate-output was written by Jeroen van Wolffelaar <jeroen@wolffelaar.nl> This manpage comes under the same copyright as annotate-output itself, read /usr/bin/annotate-output (or wherever you install it) for the details. DEBIAN Debian Utilities ANNOTATE-OUTPUT(1)