echo will give undetermined results across shells and/or platforms when using special characters. The best way to get predictable behavior is to use printf with a format specifier.
Code:
printf '%s\n' 'This is a test and want \t to be just a text'
should reliably and constantly produce the output you require in any Posix or Bourne type shell across platforms.....
---
To get consistent echo behavior, you could add a simple function at the start of the script, that overrides the echo builtin and emulates the desired echo behavior (without the -n option)
Code:
echo ()
{
printf "%s\n" "$*"
}
This should work, provided IFS is set to the standard $' \t\n' (space-tab-newline).
--
But to create a text file I would use a here document instead of printf commands..
For example
Code:
cat <<EOF >file
text
text\text2
text\text2\ntext3
text\text2\ntext3 text4
EOF
Note that the second EOF has to be at the start of the line
Your suggestion using a here document worked best for all purposes. I don't even have to worry about quotes and double quotes using this solution. The script is much more improved now.
Thank you very much.
EDITED: With this option, I just realized that I'm not able to input dollar sign as text, it will remove the entire variable. Do you have a workaround for this too without having to put \ before the $ sign?
I did a search for this topic but I couldn't find it and I was sure I have seen something similar before (hard because I am not sure of the criteria for the keywords)
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how to print 3 backslah using Unix AIX,
i have try in my fedora and AIX,both give dirrent output for same echo statment
test.sh
sed -e 's/\(\)/\\\1/g' -e 's/\$?/\\$?/g' -e 's/\$#/\\$#/g' -e 's/^/echo "/g' -e 's/$/ "/g' xMNBDF070 > xMNBDF070_test
xMNBDF070
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Hi All,
I'm using KSH and am writing a small script that counts the lines of various files in several folders under one root folder.
Below is the script:
#!/usr/bin/ksh
common_path_in="/interface_in/rsc"
file_out="/interface_in/rsc/record_count.csv"
tot_rec_count=-1
act_rec_count=-1... (5 Replies)
Hi,
I have written this code
------------------------------------------------
# !/bin/ksh
i=0
while
do
j=$i
while
do
echo -e $j
#printf "%d",$j
j=`expr $j - 1`
done
echo
i=`expr $i + 1`
done
----------------------------------------------------
The ouput which... (2 Replies)
Hi,
Iam using ksh and trying to execute the following syntax to replace one word of the sentence with a new word. But somehow sed is not able to replace the old value with new value. Please let me know where Iam going wrong.
Sample Code :
-->
export line="VORTEX,abcdef"
export... (3 Replies)
I am using echo in bash. Have created a function prargv which takes a number of arguments.
Example:
prargv "-e" "--examples"
Inside prargv, I want to print all the arguments using echo
echo "$@"
This returns
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Currently using below script but echo it print the output in two line.
Input file all-vm-final-2.txt
CEALA08893 SDDC_SCUN DS_SIO_Workload_SAPUI_UAT_01 4
CEALA09546 SDDC_SCUN DS-SIO-PD5_Workload_UAT_SP1_Flash_07 4
CEALA09702 SDDC_SCUN DS-VSAN-RMP-WORKLOAD01 4
DEALA08762 SDDC_LDC... (3 Replies)
Discussion started by: ranjancom2000
3 Replies
LEARN ABOUT DEBIAN
escape
escape(1) Mail Avenger 0.8.3 escape(1)NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)
04-16-2015
