Hi,
I want to extract a part of filename and pass it as a parameter to one of the scripts. Could someone help.
File name:-
NLL_NAM_XXXXX.XXXXXXX_1_1.txt.
Here i have to extract only XXXXX.XXXXXXX and the position will be constant. that means that i have to extract some n characters from... (6 Replies)
Hi, I need
to make some extraction . with the following input to get the right output.
input: /etc/exp/home/bin ====> output: exp
and
input: aex1234 ===> output: ex
Thanks for your help, (4 Replies)
Hi All,
I am trying to write a small shell programming to get db2 database size info. The command I am going to use is- db2 "CALL GET_DBSIZE_INFO(?, ?, ?, -1)"
and the output of above command generally is-
Value of output parameters
--------------------------
Parameter Name :... (4 Replies)
Hi friends,
I want to select and use the certain part of a line. For example I have the following line
home/1245/hgdf/acsdf/myhome/afolder/H2O/endfile
how can I extract the part " /myhome/afolder/H2O/endfile "
thanks (6 Replies)
I have a file with 100s of lines of text. I want to perform an extraction of this line:
Info bpzs(pid=2652) using 1000 bits
I have not been able to extract it. Should I try expr match or is there another method? This line has data both in front of and in back of it. I do not have grep -o... (5 Replies)
Hello All,
I need to extract part of a file into a new file
My file is
Define schema xxxxxx
Insert into table
(
a
,b
,c
,d
)
values
(
1,
2,
3, (15 Replies)
Hi,
I have a string with name as 20140412-s1-Potopolive_promos_20140412. So I want to extract only Potopolive string. Could you please help me the command.
O/p : Potopolive
Thx in advance (5 Replies)
Hello All,
I have a file with details such as below. How do i extract only the
host and port ?
eg: dbs.ads.com 1521
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dbs.ads.com)(PORT=1521))(CONNECT_DATA=(SID=vug)))... (5 Replies)
Discussion started by: JohnJacobChacko
5 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)