Hi, people.
I was searching script tutorials/examples and found this forum, and thought to ask for help, because there seems to be many wise people here.
(Try to bare with me, I'm a Windows user, so this stuff is somewhat strange to me, OK? :rolleyes: )
Anyways, I need to create a script that... (3 Replies)
I have a script that I need to create tha involves moving files and renaming them(see previous post)
Are there any websites with user made shell scripts? (5 Replies)
Hi, my team has existing ftp scripts that basically ftp files from one server to the other. Can anyone show me how to add some lines where if the ftp fails, an email could be sent out to myself and others on my team so that we are alerted? Thanks in advance. (11 Replies)
Hi all,
I need help to figure out this grep. I would like to search all files in a directory for the occurrence of abc AND xyz. I started with this:
grep -i abc * | grep xyz
But this only returns lines which contain both values on the same line. So I am thinking that I need to do... (5 Replies)
ok, so what i want to do is make a script that will do the following:
take out from a command in the terminal
put that output into a text file already on my computer.
the only thing is that i need to put the output in the file kinda weird: i need to take it and put each character of output... (13 Replies)
Hello,
my program works properly but valgrind tells me I am not freeing allocated memory. I think the problem is in realloc.
I am pretty sure I do something wrong with realloc, because I changed it a bit and valgrind noticed less errors (that the program wasn't working properly with less errors... (3 Replies)
Hi,
I'm trying to figure out the best solution to the following problem, and I'm not
yet that much experienced like you. :-)
Basically I have to read a fairly large file, composed of "messages" , in order
to display all of them through an user interface (made with QT).
The messages that... (3 Replies)
I have a text file for which i need a script which does some fancy search and replace.
Basically i want to loop through each line, if i find an occurance of certain string format then i want to carry on search on replace another line, once i replaced this line i will contine to search for the... (7 Replies)
Hello Everybody,
I am a mid-level Linux administrator trying to get a hold of Solaris. So far, my experience has been painful.
I think it's confusing and it's just a big mess...
To be more specific, I have noticed that whenever I install a package... it never followed a specific pattern.... (4 Replies)
As a followup to my previous thread, I'm trying to make a complicated perl script that involves storing information from a text file into a hash, and giving the user the ability to change the information present/write the information currently inside the hash to a new file. This is the code I've... (8 Replies)
Discussion started by: Eric1
8 Replies
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)