I'm having trouble with Abnormal Termination errors. What are they, what causes them and how can I prevent them from happening? Are they application specific? (2 Replies)
Hello all,
Here is the problem:
A ksh script (let's call it abc.sh) gets kicked off from a menu program using "nohup abc.sh &". The process ID of abc.sh can be recieved (pid=$!).
abc.sh runs an Oracle PL/SQL script (it creates a child process).
In order to stop the abc.sh (and the child)... (5 Replies)
hi
i m writin a program in which i keep track of all the child processes the program has generated and if a child process has an abnormal termination i need to do certain task related to that child process.
for handlin child process i used waitpid:
temp_cpid=waitpid(-1,&stat,WUNTRACED);
... (4 Replies)
Hi All,
I was reading the man page of snprintf function and it saids that snprintf adds a null terminator at the end of the string, but I remember once someone told me that snprintf doesn't guarantee the insertion of a null terminator character.
What do you think? Does anyone have experience... (4 Replies)
I'm writing a script to archive data. First, the files are all rsync'd to the archive directory via NFS mounts(I know not the most efficient, but the only choice in this situation), then I use md5sum to validate the transfers. During execution of the script, it will exit for no apparent reason. It... (6 Replies)
Hi
I have a Shell script that needs to execute a command at the
End of the excursion of other script And I cant get a handel
On the trap command. And that is if the trap command
Is the proper way to go
this is a extract of the script
MYHOST=`hostname| cut -d. -f1`
echo $MYHOST
... (4 Replies)
So, I'm writing a shell script to help automate a process I'm doing. Basically I want to take input from the user for 2 variables, then create a file that consists of:
Variable1,Variable2
Constant1
Constant2
..
Constant2000
then run an awk script. I'm pretty new to unix though, and so... (11 Replies)
http://ep.yimg.com/ay/iercomputer/ibm-39j5022-ultra320-scsi-adapter-dual-channel-pci-x-fc5736-3.gif
I have bought this controller.
Simple and fast question: I will put on this controller a external LTO tape,which is terminated with a terminator.
I have to put another terminator on PCI-controller... (1 Reply)
I am running the gaussian program on UNIX with bash and I want to form a script that will email me once the output life terminates either "normal termination" or "false" I just started learning this last week so could you let me know how to go about this.:b: (13 Replies)
Discussion started by: Jade_Michael
13 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)