Hi,
I hope this is problem makes sense and that someone can offer some advice.
Basically i have a perl script which accesses a database and outputs the information to a file.
Is it possible to use a 'system' command to embeb some Unix command which moves that file to another directory... (3 Replies)
Hi guys am doing some checking inside my script and i want to redirect my output to a specific file for example checking if a move was successfully done and was writing on the screen whether the move was successful or not and now want to write same thing into a file...
I am new to shell... (2 Replies)
Is it possible to run <talk> such that both sides of the conversation are written to the screen and also to a file?
I use the utility to chat with collaborators and sometimes it would be nice to have a record of our conversation while we are problem solving.
I am running OS X, so <talk>... (4 Replies)
Hi
We are having a requirement where one shell script, say a.sh (which uses Java and connects to Oracle database using JDBC) keeps on running everytime. I created a wrapper (to check whether a.sh is running and if not then to start it) and scheduled it in the crontab. Now all the output from... (3 Replies)
Hi,
I am unable to get this script to work as desired. Basically, if an argument "log" is sent into the script, it outputs the result of the Make to a file output.log. However, if the argument is not passed, I want the output to be just put on screen (no redirection). See code snippet below.
#... (3 Replies)
Hi,
I want to redirect my script output to more than one file without printing the result to the screen. How to do that?
ex:
echo "hi" >> a.txt b.txt
cat a.txt
hi b.txt
:confused: (2 Replies)
Hi
Does anyone have any suggestions for capturing the output into a file when i run it through cron?
I have file called "quick.1" which contains two simple commands to be executed on the target host. And i have second file called "quick.2" which contains the wrapper script to ssh to the target... (1 Reply)
1. The problem statement, all variables and given/known data:
I'm having trouble redirecting the output of my sysinfo_page script into my sysinfo_page.html file. The task at hand is to be able to email both the html file and the script to myself. I'm assuming that the html should appear as a web... (8 Replies)
Hi,
I have created script which redirect the output to file.I am able to get the output in file but not in the format.
Output :Content of the log which have 10 -15 lines.
Actal :Line1 ..Line 2Line3 Line4 Line 5
Expected:Line1
Line 2
Line3
Please... (7 Replies)
Discussion started by: karthik771
7 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)