Hi,
I have a program that searches for a particular string patten. I am however having difficulty passing the varible $i (in a loop) as the string pattern to replace. Using either perl or sed search and replace statements, I get the same kinda result. For example, using the perl:
for i in... (3 Replies)
hi
How can one change an environment varaible inside a shell script
say my bash shell has a env variable export FOO="Day"
no i want to write a script inside which the FOO variable is modified to say
export FOO=NIGHT
after this script finishes te bash shell should show me NIGHT when i... (1 Reply)
I need to run a set of commands on a remote machine using ssh. it should also collect output and return status of each command. Can someone help me how to do this? (1 Reply)
Hi all,
I want to monitoring my interface every 6 hours where i want to run snoop command to capture all packet through the interface, so i want running snoop then snoop will run for 5 minutes after that snoop stop then will start again after 6 hours than run for 5 minutes again.
thereis any... (9 Replies)
Hi All,
We need to run a Connect direct script on Unix server to send a file to Mainframe server and at mainframe end there need to run another job through Runtask with some parameters need to be passed from C:D (unix) to mainframe.
My question is I have to pass parameters like DSN and FNAME as... (2 Replies)
Hi,
I have a script in my home directory. it has to be run every day. as of now, im manually running as ./myscript.sh
Can someone please tell me how to set it as automatic run (runs everyday at specific time ) so that it runs even if im not there. (9 Replies)
Hi,
I am looking for a shell script which serves the below purpose.
Please find below the algorithm for the same and any help on this would be highly appreciated.
1)set of strings need to be replaced among set of files(directory may contain different types of files)
2)It should search for... (10 Replies)
Hi all,
I have this script which sends mail whenever the system is down. It works fine. Normally the system is down from 21 00 to 21 30 from Monday to Saturday and from 21 00 on Sunday to Monday 06 00 for maintenance. So I want the below script to run only when the system is up, i.e outside the... (2 Replies)
Discussion started by: frum
2 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)