03-07-2005
Strip leading and trailing spaces only in a shell variable with embedded spaces
I am trying to strip all leading and trailing spaces of a shell variable using either awk or sed or any other utility, however unscuccessful and need your help.
echo $SH_VAR | command_line Syntax.
The SH_VAR contains embedded spaces which needs to be preserved. I need only for the leading and trailing spaces to be removed. If anyone has accomplished this before or knows a quick way to achieve this result please let me know
Thnx
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
how to i remove leading and trailing spaces from a line? the spaces can be behind or in front of any field or line
example of a line in the input data:
Amy Reds , 100 , /bin/sh
how to i get it to be: Amy Read,100,/bin/sh
i saw something on this on the Man pages for AWK... (7 Replies)
Discussion started by: sleepster
7 Replies
2. UNIX for Dummies Questions & Answers
I am having xml document as below.
<transactionid>
00
</transactionid>
<tracknumber>
0
</tracknumber>
<key>
N/A
</key>
But the data contains leading and trailing spaces between the tags. Please let me know how can i remove these leading and trailing spaces between the tags.... (2 Replies)
Discussion started by: jhmr7
2 Replies
3. Shell Programming and Scripting
#!/bin/bash
TESTVAR=" 5spaces"
echo $TESTVAR
hostame:~# ./test.sh
5spaces
The leading spaces from my variable are removed when the content is echo'd. I am trying to make some tabular data.
`echo -e` also fails.
Any suggestions? (2 Replies)
Discussion started by: grumm3t
2 Replies
4. Shell Programming and Scripting
Dear All,
can you please advice how do i remove trailing and leading spaces from a pipe-delimited file using "tr" command
the below cmd, i tried removed all spaces
tr -d ' '<s1.txt>s2.txt1
Many thx
Suresh (5 Replies)
Discussion started by: sureshg_sampat
5 Replies
5. Shell Programming and Scripting
Hi All,
I have a file with the following contents with multiple lines
172445957| 000005911|8| 400 Peninsula Ave.#1551 | And,K |935172445957|000005911
607573888 |000098536 | 2|Ane, B |J |Ane |1868 |19861206|20090106|20071001
I want to trim the "leading and trailing spaces only" from... (2 Replies)
Discussion started by: kumar04
2 Replies
6. Shell Programming and Scripting
Hi All,
I am trying to replace the value of a xml tag with a new one. But, the existing value in the xml contain leading spaces and I tried to remove that with different sed commands but all in vain.
For replacing the value I wrote the command in BOLD letters below:
bash-3.00$... (3 Replies)
Discussion started by: khedu
3 Replies
7. Shell Programming and Scripting
I am getting a value from a csv file using CUT command, however the command extracting the records with trailing spaces. I am using the result into a sql session to fetch data, because of the trailing spaces the sql session is unable to fetch any data.
Please let me know, how to remove this... (2 Replies)
Discussion started by: mady135
2 Replies
8. UNIX for Dummies Questions & Answers
I want to keep string/varible length to 10 even its actual length is less than 10(may be no value). so, i want to add trailing spaces to my string. :wall:
"typeset -L10 myvarible" is not working, its saying invalid typset -L option.
Can you please advise. (4 Replies)
Discussion started by: djaks111
4 Replies
9. Shell Programming and Scripting
Hi,
I am trying to remove leading and trailing spaces from a file using awk but somehow I have not been able to do it.
Here is the data that I want to trim.
07/12/2017 15:55:00 |entinfdev |AD ping Time ms | .474| 1.41| .581|green |flat... (9 Replies)
Discussion started by: svajhala
9 Replies
10. Shell Programming and Scripting
Hi
I have variable named tablename. The value to tablename variable has leading and trailing white spaces. How to remove the leading and training white spaces and write the value of the tablename without space to a file using shell script. ( for e.g. tablename= yyy )
INPUT
... (10 Replies)
Discussion started by: pottic
10 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)