10-16-2014
Quote:
Ok, here's the smallest i could get...
But now script3 gets lost among the way
What does 'lost along the way' mean?
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a sript which is going to trigger other 3 scripts in background simultaneously
for eg:
Main Script:(main.sh)
-----------
sh a.sh &
sh b.sh &
sh c.sh &
How to catch the exit status and store it in a variable for all those three scripts in main script. Is there any other way of... (4 Replies)
Discussion started by: Omkumar
4 Replies
2. UNIX for Dummies Questions & Answers
In my last job someone gave me the command to put in my .profile that let me know when a job I had running in the background finished. It was a word about 5 char long. I can't remember it! (4 Replies)
Discussion started by: nkeller
4 Replies
3. Shell Programming and Scripting
I have the following sample script to run a script the jobs with the same
priority(in this case field3) in parallel; wait for the jobs to finish
and run the next set of jobs in parallel.When all the lines are read
exit the script.
I have the following script which is doing evrything I want... (1 Reply)
Discussion started by: hyennah
1 Replies
4. Shell Programming and Scripting
Hi All,
I have a scenario where I am executing some child shell scripts in background (using &)through a master parent script.
Is there a way I can capture the exit status of each individual child script after the execution is completed. (2 Replies)
Discussion started by: paragkalra
2 Replies
5. Shell Programming and Scripting
Hi all, i hava a specific backgroud process. I have de PID of this process. At some time, the process finish his job, is there any way to catch the exit code? I use "echo $?" normally for commands.
Thanks! (2 Replies)
Discussion started by: Xedrox
2 Replies
6. Shell Programming and Scripting
Hi, I have written a script that allows me to repetitively play a music file $N times, which is specified through user input. However, if I want to exit the script before it has finished looping $N times, if I use CTRL+c, I have to CTRL+c however many times are left in order to complete the loop.... (9 Replies)
Discussion started by: hilltop_yodeler
9 Replies
7. Shell Programming and Scripting
Hi, below is my master script wihch inturn runs 2 scripts in background
#master_script.sh
./subscript1.sh &
./subscript2.sh &
executed the master_script.sh from unix command prompt
$ ./master_script.sh
it is executing the subscripts and they are completing fine, however master_script.sh is... (2 Replies)
Discussion started by: JSKOBS
2 Replies
8. Shell Programming and Scripting
Hi
Could someone offer some help on this problem I've got with running a background process.
As part of a script that does a stop/start/status for a piece of software called SAS, the following extract is from part of the start step.
My issue is that when the script is run, the control... (0 Replies)
Discussion started by: GavP
0 Replies
9. Shell Programming and Scripting
Hello,
I am running a bash script to do an rsync back on a computer running MacOS High Sierra. This is the script I am using,
#!/bin/bash
# main backup location, trailing slash included
backup_loc="/Volumes/Archive_Volume/00_macos_backup/"
# generic backup function
function backup {... (12 Replies)
Discussion started by: LMHmedchem
12 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)