i am having a weird error on mac os x running some shell scripts. i am a complete newbie at this and this question concerns 2 scripts. one of which a friend of mine wrote (videochecker.sh) a couple weeks ago and it's been running fine on another machine.
then last week i wrote capture.sh and it... (2 Replies)
Hello all,
Here is what my bash script does: sums number columns, saves the tot in new column, outputs if tot >= threshold val:
> cat getnon0file.sh
#!/bin/bash
this="getnon0file.sh"
USAGE=$this"
InFile="xyz.38"
Min="0.05"
#
awk '{sum=0; for(n=2; n<=NF; n++){sum+=$n};... (4 Replies)
Would really appreciate it if someone could point out my mistake in this line of code, i've been staring blankly at it trying everything i can think of some time now and coming up with nothing.
#!/bin/bash
echo "Enter Username"
read Username
awk -F: -v var=${Username} '/^var:/... (9 Replies)
This is the final first release of the dynamic menu generator for pekwm (WM).
#!/bin/bash
function param_val {
awk "/^${1}=/{gsub(/^${1}="'/,""); print; exit}' $2
}
echo "Dynamic {"
for CF in `ls -c1 /usr/share/applications/*.desktop`
do
name=$(param_val Name $CF)
... (3 Replies)
Ok, so I have a bash script with an embedded expect statement.
Inside of the expect statement, i'm trying to pull all of the non-comment lines from the /etc/oratab file one at a time.
Here's my command:
cat /etc/oratab |sed /^s*#/d\ | awk 'NR==1'|awk -F: '{print \"$1\"}'|. oraenv
Now,... (0 Replies)
Hello,
i have bash script where im cycling some command for different lines in external file.
example:
while read domain;do
nslookupout=$(nslookup -type=ns $domain) || true
another commands
done < filenamewithdomains
i added:
|| true
after the command in belief it will just skip... (6 Replies)
Hello, I want to run a field from an awk command through a command in bash.
For example my input file is
1,2,3
20,30,40
60,70,80
I want tot run $2 thought the command
date +%d/%m/%y -d"01/01/15 + $2 days -1 day"
and get the output
1,02/01/15,3
20,30/01/15,40
60,11/03/15,80
... (2 Replies)
Hello everybody,
I would like modify some strings using sed or another command line with the content file.
For example:
- {fqdn: "server-01" , ip: "server-01"}
- {fqdn: "server-02" , ip: "server-02"}
- {fqdn: "server-03" , ip: "server-03"}
- {fqdn: "server-04" , ip: "server-04"}
My... (4 Replies)
Discussion started by: dco
4 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)