You are getting an error from the command itself - you are trying to set up an emulated device that is already set up. I think you are misusing the command itself, which I know very little about.
NO, becasue I derectly use below cmd which print by echo "$QEMU_CMD" it works
Hello all, need a little help.
I have an input variable such as ARGV which equals something like
/use/home/name/script/test.dat
I need to be able to get just the "test.dat" (i.e. the file name) at the end of the directory and the directory can be anything and any length. To put it another... (3 Replies)
I have a variable (it is a date actually -> 2007-01-03) which
would be passed in as parameter, what I want is to parse in and put
year, month, and day in separate variables, I have tried the following
but doesn't work
echo $dt | awk -F- '{print $1 $2 $3}' | read y m d
Thanks in... (2 Replies)
I have a script I use on my web server (Apache2). I am changing to Lighttpd and need to make a few changes.
This is what I use on my apache server
#!/bin/bash
# accepts 3 parameters: <domain name> <user name> <XXXXXXXX>
# domain name is without www (just domain.com)
# username would be... (3 Replies)
Hello,
Is there a quick way to parse the values from a variable?
The variable has the following sample input:
TA=
The values of the TA variable is not fixed/hardcoded
Basically I need to get the IV_Test and PF_SAPP_FWK values.
I created a script that first use sed to remove ,... (3 Replies)
I have a variable which has a full path to the file, for example :
A=/t1/bin/f410pdb
Does anybody know the command to parce this variable and assign the result to 3 other variables so each subdirectory name will be in a new variable like this
B=t1
C=bin
D=f410pdb
Many thanks -A (5 Replies)
What I am trying to do is write a script that makes some commands easier, now one of the commands is to rebuild mail boxes in plesk, which would would be something like
/usr/loca/psa/websrvmng --vhost-reconfigure --vhost-name=domain.com
but the domain.com bit is going to need to change with... (3 Replies)
Hi,
I want to parse nested variable in my script.
for exp-
c=1
G1='0318'
G2='0023'
G3='3092'
G4='0014'
while ;do
g=G$c
a=$g
echo "Group=$g and value=$a"
c=`expr $c + 1`
done
final output are as -
---------------------------
Group=G1 and... (4 Replies)
Hi all,
I am passing a variable in .mk file as
NEED="TEST=Name WORK=Ps DEL=let"
I need to echo and export each variable like TEST, WORK. DEL
TEST=Name
WORK=Ps
DEL=let
We have to parse the NEED variable which may contain many elements like TEST, DEL& etc..
Any idea on this... (10 Replies)
Im trying to search for a single variable in the first field and from that output use awk to extract out the lines that contain a value less than a value stored in another variable. Both the variables are associated with each other.
Any guidance is appreciated.
File that contains the... (6 Replies)
Discussion started by: ncwxpanther
6 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)