In bash, instead of ${string} you can use ${string// } to remove all spaces from string.
Thank you so much for this tidbit. I modified what should be line number nine in the excerpt below which eliminated two lines of code that I came across elsewhere. Below is an excerpt of the shell script file that includes your code which seems to work as expected and hoped.
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Thank you again.
By the way, I wasn't able to get what you mentioned the following earlier but I imagine that I was implementing it incorrectly which resulted in the errors when I tried to tinker with it. If you don't mind, can you walk me through implementing the cleaner-looking method using the array, please?
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Quote:
Originally Posted by Scrutinizer
If you are using bash , you can also read the fields of the first line into an array:
and then use ${string[8]} for the ninth field.
I have a program that will export my data to a single file, but it assigns a file name that is overridden every time I run the program. I need to change the file name to have a sequential number in the filename.
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I am wanting to automate a process that includes the step of appending to a filename a string of text that's contained inside the file. I.e. if filename A.fileA contains a string of text that reads 1234 after the phrase ABC, I want the shell script file to rename the file 1234_FileChecked_A.fileA.... (3 Replies)
Hi ,
I have below file with 13 columns. I need 2-13 columns seperated by comma and I want to append each row with a string "INSERT INTO xxx" in the begining as 1st column and then a variable "$node" and then $2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13 and at the end another string " ; COMMIT;"
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Hi
I have a file with filename as "partition-setup-and-ipl.vtcmd.76217657132.9721536798"
Now i need to move this file as "partition-setup-and-ipl.vtcmd.76217657132.9721536798_org"
i tried with
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Hi,
I have a lot of files similar to the below order. I want to rename all the files .discrading the time stamp/numbers after cnf.
Existing files
id_info_20130405.cnf_20130801
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iz_info_20130405.cnf_20130821
in_info_20130405.cnf_20130818... (2 Replies)
Discussion started by: saravanapandi
2 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)