Hi,
I have a scenario where in i have to extarct max of one column and pass it to a variable.
i have tried to export the result as .dat file and read from that file.But my database is mainframe and it is not permitting me to export in .dat file.I have tried using .ixf file but reading from... (2 Replies)
I have a variable called V_param1 and does it have some value.
I want to check this varibale is NULL or Zero then exit else do
How to incorported this in Script. any input (2 Replies)
Hi All,
I need some info.
Could you please tell me how to use the variable of a parent shell in the subshell. Also can we modify the variable in the subshell ? If yes, will the modified variable visible in the parent shell
I am using two prg.
a.sh
#!/usr/bin/ksh
temp_var="abhishek"... (3 Replies)
i wanna insert a row in a file.
I m using this command to insert a row in the 13th line.
sed '13i\
NewRow' MyFile > temp.txt
mv temp.txt to MyFile
this works fine.
now i wanna get the line no using grep into a variable and then use tht variable to insert a new row..
how to do this wid... (8 Replies)
I am trying unsuccessfully to set into a variable a specific part of command output:
The command output will be as:
line 1: <varied>
line 2: 2 options:
option 1:
Set view: ** NONE **
or
option 2:
Set view: <different_name_of_views_always_without_spaces>
and I would like to get into... (7 Replies)
I'm hoping you guys can help me out here. I've been trying different methods to try and get what IW as hoping would be a fairly simple script but has turned into a pain.
Bit of background - I am writing a script to check values in certain failes to ensure they are corerct. I'm runnign this on... (2 Replies)
I can not make it work, it prints \t rather than introduce tabs.
cut -d "," -f 4,8 Samples.csv --output-delimiter="\t" | sort > out
Since I am running this command within a shell script, I tried manually inserting tab in this command, still does not work. I am using bash shell
Suggestions... (8 Replies)
Hi Guys,
I like to output every command executed in the script to a file.
I have tried set -x which does the same.
But it is not giving the logs of the child script which is being called from my script.
Is there any parameters in the Set command or someother way where i can see the log... (2 Replies)
Hello,
I have one query regarding passing IF condition shell variable inside awk. Here is the case-
File content of keydefn.exp
201~2~LM Limit 02-current value~Limit 02 ~Limit02~Current~Value ~N~Y~S~0~9999999
201~3~LM Limit 03-current value~Limit... (2 Replies)
Discussion started by: anillambait
2 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)