11-29-2011
-ne doesn't work that way.
What you can do depends on what system and shell you have.
What's your system?
What's your shell?
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1. Shell Programming and Scripting
Hi everyone,
Can someone possibly help me with this problem I am having please.
I wrote a Korn shell script to manipulate currency amounts in a way that a person could use this script to determine the minimum number of coins required to make a certain amount.
for example when entered on the... (2 Replies)
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2. Shell Programming and Scripting
Hi,
how to do that ? I mean only print it but not execute. I'm using putty to interact with ksh.
(in windows cmd up arrow does the job)
thanks
vilius (5 Replies)
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3. Programming
hi,
I'm trying to create a program that will read a file and then check the file for each letter of the alphabet and then output the letter and the number of times it appears in the file, into a new file... this is what i have so far but it's not working.. if anyone could help that would be nice!... (10 Replies)
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4. Shell Programming and Scripting
I need the date validation. I searched in the google but i didn't find my requirements.
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5. Shell Programming and Scripting
Hello, I am writing a script and in this script, I want to be able to have the script continue running if the correct word is not entered...
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read request
if ;
then
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6. Shell Programming and Scripting
Hello Guys,
I am writing a script which check each line for how many Uppercase and Lowercase letter of a given file. Please check my script as follow:
l=0
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7. Shell Programming and Scripting
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8. Shell Programming and Scripting
Hello
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9. UNIX for Beginners Questions & Answers
Say I have this line:
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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)