I have a script, myscript.pl
I want to set the script to exit if it is already running.
At the moment I am using soft stop.
eg:
if -e dummy file then exit
else create a dummy file
Is there any other better way to perform this?
Maybe
ps -ef | egrep 'myscript.pl' (3 Replies)
I have created a shell script.
I want to run the script in Autosys.
Please note my shell script runs as "$ ksh run.ksh"
How do I make autosys run this script at 5:00PM every day?
insert_job: abc job_type: c
box_name: run.box
command: ksh run.ksh
machine: mach1
#owner: mach1@mymach... (1 Reply)
Hi
My five script run throgh crontab at same time at 6 clock.
Due to problem in the data load .Now I want to check time of load finish run these jobs. I create a script which check the load finish time but I have no idea how I run these JObs. This is very urget to me. Please reply me as soon... (3 Replies)
Hi!
I need to run my script for a specific number of time, as specified by the user: For instance, if the user specified 10, my script should run for until 10 seconds expire. How do I do this? (0 Replies)
Shell script to find the run time based on log entries?
Below is the log files content updated when the script test.sh runs. I would like to calculte the difference between first update time stamp and last update time stamp to find the run time of the script. The below log file shows the first... (1 Reply)
Hello
I am asked to run around 5-6 SQL queries in a shell script and take a note of the time taken to execute each query to a file. How do I get the time taken to run the individual SQL queries (2 Replies)
I have an ETL process that triggers a shell script. This script picks the files created by the ETL process and does an SFTP. These are huge files. Due to infrastructure limitations, we need to trigger the actual SFTP part only during the 2nd, 16th, 31st and 46th minute of an hour. Please let me... (2 Replies)
I have bash shell script which is internally calling python script.I would like to know how long python is taking to execute.I am not allowed to do changes in python script.Please note i need to know execution time of python script which is getting executed inside shell .I need to store execution... (2 Replies)
Hi All,
Would like to write a Script which will run between 11am to 3 pm and send the results to output.txt.
Please suggest. (2 Replies)
Discussion started by: vasuvv
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)