01-29-2020
Quote:
Originally Posted by
adgjmpt
@RudiC
I am new to this forum, Still finding my way around the rules for posting in this forum, Apologizes for the formatting errors i have done.
No need to apologize, and it's not about formatting / posting rules either, although adhering to them is highly welcomed. Help people help you by creating a decent, detailed, in depth specification that doesn't leave questions nor uncertainties open.
Quote:
In reference to your Post-3
- how to select / reject the devices (e.g. 172.17.168.227 is missing in your desired output)?
All devices have to accepted my output may have omitted the device while formatting
- how to fill items not yet found when encountering the print trigger ("System Name:")?
If the item is not found it can be set as null
- why not use "System Description" as the print trigger?
By mistake i guess i pasted the version of the script which i was working on , Print trigger was actually should be "System Description"
- why <TAB> chars in your desired output, not the commas set as OFS in your script?
I copied from the output from excel and tried to format it to paste in the forum, The Formatting got messed up.
Please look back into all your posts in this thread so far. I admit there may be a language barrier (I'm not a native speaker, either), but: They're incomplete, unstructured, messed up (sic), and contain mistakes (sic). How should someone start decent analysis or programming based on what's given? Everything given so far is based on guesswork and doomed to fail on your real request.
EDIT:
BTW, if the input data is as unstructured as you attached it, it might be wiser to look for a different approach... Show the process you use from the beginning.
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LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)