10 More Discussions You Might Find Interesting
1. Programming
hi,
i want some advice on
a programming book should every programmer read? (2 Replies)
Discussion started by: kaja
2 Replies
2. Shell Programming and Scripting
as title suggest i am looking for good book to start learning shell programming.please help me with this. (5 Replies)
Discussion started by: pvk21
5 Replies
3. Shell Programming and Scripting
Hi ,
I might be asking a silly question but I just wonder if I can design/create my webpages using korn Shell or bash instead or using perl or php.This webpages I want to create are basically to perform admin work. With Perl the limitation for me is the fact of having to compile and install... (1 Reply)
Discussion started by: arizah
1 Replies
4. UNIX for Dummies Questions & Answers
which is a gud book to learn advanced korn shell scripting?
i know the basic shell scripting (1 Reply)
Discussion started by: shishirkotkar
1 Replies
5. Shell Programming and Scripting
Hello All,
I have another Korn shell question. I am writing a script that will ftp a file from my production database to my test database.
To this, I have to construct a loop that checks a specified folder for a file.
If the file exists, I want it execute the ftp protocol and then exit. ... (2 Replies)
Discussion started by: jonesdk5
2 Replies
6. Shell Programming and Scripting
Hi frnds i'm new to programming in shell, i just started to study in net but
i want some book to refere , so any one pls tell me which books i can refere
pls rate the book like for begining , user level , then for pandith or to become pandith level....... (3 Replies)
Discussion started by: ~monu~
3 Replies
7. Programming
please tell me the best book for Unix's System programming.....
so that i become expert in System programming.I have completed shell programming and i know C programming in Unix.
please tell me which book i should prefer...
-ajit (1 Reply)
Discussion started by: ajit_gupta
1 Replies
8. Programming
Hi,
I am starting out to program on Unix, having had experience in C and C++ in DOS. I would like to know, of these three, which is the best book for learning C programming in Unix:
Advanced Unix Programming by Marc Rochkind
Advanced Unix Programming by Warren Gay
Advanced Programming in... (6 Replies)
Discussion started by: theicarusagenda
6 Replies
9. UNIX for Dummies Questions & Answers
Any recommended book on Unix & Shell Programming (7 Replies)
Discussion started by: endeavour1985
7 Replies
10. Shell Programming and Scripting
hi,
i am ajay. I need a good book for shell programming. a book which covers from fundamental to advance shell programming. (3 Replies)
Discussion started by: ajaygodbole
3 Replies
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)