Hi all,
I have developed a couple of libraries using ruby for my networks project.Its completely done except for a GUI for the front end.
But i am in a fix to know what i need to be using for its development.
I initially had plans of using ROR but there is absolutely no DB management that is... (1 Reply)
Hi,
I am fairly new to unix so please go easy on me.. I have a VPS on which I would like to setup a development and live web site environment and can't seem to work out what is the best technique for doing so.
I would like to be able to mirror the live site and have a "check out" and... (0 Replies)
I am just getting into web development and I want to understand it better and more theoretically. :D
So by now I can create some basic websites with html, css, php, etc, but what I do not understand is how is this then projected into the world wide web or what we call the internet??? Of course... (2 Replies)
Hello,
After a bit of basic advice please. What web development languages are available and what are the advantages of each? If this is too basic a question, can someone please signpost so i may research this.
I ask as I have a couple of websites that i need to develop but new to programming... (16 Replies)
Here is a shout-out to wisecracker, who selected the sound track for this new video:
Top 5 Roadblocks to a Secure Cyberspace in 2019
https://youtu.be/2rXo_ywM-NQ (7 Replies)
You are seeing this new video here first!
Top Five Cybersecurity Threats | Earth Year 2019 | You Have Been Warned!
https://youtu.be/dRE4u9QVsSg
PS: That video has two small typos, but nothing serious. Heck it took nearly 1.5 hours to render even on a 12-core Mac Pro with 64GB of... (20 Replies)
Discussion started by: Neo
20 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)