Hi All,
I need to pass a variable to perl script from bash script, where in perl i am using if condition. Here is the cmd what i am using in perl
FROM_DATE="06/05/2008"
TO_DATE="07/05/2008"
"perl -ne ' print if ( $_ >="$FROM_DATE" && $_ <= "$TO_DATE" ) ' filename"
filename has... (10 Replies)
Hi all,
I am running a Java program on a Linux server in which I read in a base directory path from the *.properties file. During processing, I build a unique file name and create a file to save data, concatenating the directory path and the file name. Works fine, except that I now need to... (2 Replies)
Hi All,
I am trying the following to set the environment variable in my scirpt.But it is not setting with the correct value.
Can you guys please help me out to get the correct value.
1. I have environment variable NLS_LANG=American_America.UTF8
2. In my script (ksh) i am trying the following... (1 Reply)
Hello!
For the moment some settings in my .bashrc contain the password of my company's firewall, which is not a good idea. I would like to use the string "PASSWORD" set in .bashrc and a script that changes all appearances of "PASSWORD" in the environment variables by the actual password (which... (4 Replies)
I have 3 programs, 1 in perl, 2 in csh: call them perl1, csh1 and run.ol
I need perl1 to set csh1 variable NOLOG_qsub = ""
I need perl1 to run, run.ol
run.ol takes the executable and input and outputs to output
run.ol#!/bin/csh -f
# run.ol executable input output
perl1 should... (1 Reply)
I want to set a enviroment variable
VDC_DIR to a particular directory.
I am doing it as
export VDC_DIR=/abc
it gets set but when i logout and do relogin than its not there.
one way could be setting it in .profile file.
but i have seen it on another box where it is not present in... (2 Replies)
Hello.
Normally when you double click on the file name, the shell script start in background.
If you want to see what is going on, you must open a terminal console and start the shell within the terminal.
Is it possible to start directly a shell script in a terminal console from the file... (0 Replies)
Hi all - just started using Linux Mint 17 and I need to change the Foreground & Background Colours for the Terminal, my eyesight is not what it used to be many years ago, so any help would be much appreciated.
Regards
Malcolm (6 Replies)
I know that I can do this in bash
ver=${VERSION:-$DEFVERSION}
so ver is $VERSION if it's set but $DEFVERSION if $VERSION isn't set
I want to do the same thing as a macro in a Makefile and can't get it to work - maybe something like...
VER=$(shell ${$(VERSION):-$(DEFVERSION)})
Any help... (1 Reply)
Hi All,
I need to pass a variable from bash script to perl script and in the perl script i am using those variables in the sql query but its giving
error :
Use of uninitialized value $ENV{"COUNTRYCD"} in concatenation (.) or string at /GIS_ROOT/custom/tables/DBread_vendor.pl line 50.
Can ... (6 Replies)
Discussion started by: NileshJ
6 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)