Hi all,
I am trying to create a file which has one or more ranges based on a file containing a long list. The problem is that the file which has this list is not continuous and is broken in many places. I will try to illustrate by an example:
The List File:
1
2
3
4
5
6
9
10
11
12... (5 Replies)
Hi,
I have a file with the below like values with integers only in sorted order (May or may not be in sequence)
Eg: File1.txt
-----------
1
2
3
4
5
6
.
.
.
.
.
10000
My requirement here is to create a range of values out put to a temp k (4 Replies)
Hi All,
I am mediator Shell programmer, Just have an hands on experice :-), i am writing a shell scirpt to list logs of todays date from /var/log/messages.
I need to ur kind help where if i run this script from cron. the script should filter todays logs only from /var/log/messages.
Below... (4 Replies)
Hi guys,
I have been trying to create a list of dates from a certain range, ie.
range from 01011950 to 31122000
But when my below code reaches certain dates, it comes up with a;
'date: invalid date 'yyyy-mm-dd -d 1day'
Sofar I have come up with the following, slow and ugly;
... (4 Replies)
Hello,
I am a bit stumped on this. I am attempting to create 24 empty directories with a loop. Seems like I have incorrect syntax. When I run the following command I get the error below.
Command
$ for i in {2..24}; do mkdir $i_MAY_2011 ; doneError x 24
mkdir: missing operand
Try `mkdir... (2 Replies)
I want to create entries based on the series as in examples below:
Input:
2dat3 grht-5&&-15
3dat3 grht-16&&-30
4dat3 ftht-4&&-12
5sat3 ftht-16&&-20
Output:
2dat3 grht-5
2dat3 grht-6
2dat3 grht-7
2dat3 grht-8 (7 Replies)
Hi,
I'd like to take a list of numbers (with a prefix) and convert to a range, for example:
cn001
cn004
cn016
cn017
cn018
cn019
cn020
cn021
cn031
cn032
cn038
cn042
cn043
cn044
cn045 (5 Replies)
Hi I am having a code as stated below
module abcd( a , b , c ,da , fa, na , ta , ma , ra ,
ta, la , pa );
input a , b, da ,fa , na , ta , ma;
output c , ra ,ta ,
la ,pa ;
wire a , b , da , fa ,na ,
ta , ma;
// MBIST Structures... (1 Reply)
Discussion started by: kshitij
1 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)