07-03-2018
Quote:
Originally Posted by
Paul Walker
Hi thank you for the advice. I am not sure if I am understanding correctly what you mean I don't believe there are any newline characters contained in the target.
The way you posted it made me think of <newline> chars.
Quote:
. . . copy the final .xml file to its final destination on another disk on our network.
Usage of
cp and the host part missing in the target path lends itself to the assumption you have NFS exports mounted? Sure it's correctly mounted?
Quote:
Something does seem not quite right though when I try to copy with the $NOW variable included in the file name I am unable to do so even under the same directory, could the $NOW variable have a time limit on it since it is based on the current time?
Would be helpful to see the $NOW variable, no? There's definitely no time limit on variables. Perhaps there are no files with $NOW?
Quote:
I have included the rest of the code for the script the end product is 4 .xml files
That script is overly complicated and impossible to read and digest.
- Don't run several
sed scripts repeatedly on identical files - make that one script. What are those double single quotes for?
- Don't use lengthy path names - put those into punchy variables.
- Don't pipe text into
cat with a redirected stdout - redirect immediately. What is that single lonely
cat for?
Quote:
Is there a different set of permissions on the ksh?
Definitely not. Permissions are OS / file system features, not shells'.
This User Gave Thanks to RudiC For This Post:
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LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)