fun()
{
while read x
do
echo $x
done < somefile_that_does_not_exists
}
fun
echo I am here
Korn shell on HPUX prints the message "I am here", while the behaviour is different on AIX korn shell. We do not get the message on AIX. Any clues on how to get a similar behaviour.
hello
whats the difference between excuting a shell script as
a)sh myscript.sh
b). ./myscript.sh
i noticed that my shell script works fine when i run it as . ./myscript
.sh but fails when i run it as sh myscript.sh could anybody explain why.
the shell script is very simple
... (9 Replies)
Ho do I find out the verion of the Kron shell on my client`s system ?
There is no one to ask. They are not knowledged enough (hard to believe but yes).
Also, on that AIX 4.2, I am trying to figure out how to do a grep using a search patter like below but does not seam to work. The '*' do... (11 Replies)
Hello,
I am a bit puzzled by the way my shell treats spaces in filenames.
An example will be way clearer than any explanation I can make:
$ ls test\ file\ with\ spaces
test file with spaces
$ var="test\ file\ with\ spaces"
$ echo $var
test\ file\ with\ spaces
$ ls $var
ls: cannot... (4 Replies)
In a Korn shell script I have,
cat ../header | sed -e 's/flag1/$cnumb/g' > header.txt
The header is short
{{Company flag1}}
But the result in header.txt is
{{Company $cnumb}}
The value of $cnumb is 120. I am trying to get the value of $cnumb into the header.
I have tried /'$cnumb'/g,... (10 Replies)
Hi
Don't know if this is a dummy question, but let's give it a try.
I yesterday had a problem with undefined behaviour in the sort shell command (I'm using bash), leading to different sort orders without apparent reasons. I resolved this by typing
export LC_ALL="C"
export LC_COLLATE="C"... (5 Replies)
Hi all,
Can someone point me in the right direction for a manual on the various statement options for 'if'. Basically I have a piece of code which says:
if ]
and I wondered what the -f was. I know the '!' means not equal..
As usual any help much appreciated.. (5 Replies)
Guys, please help! I am currently using an AIX server however whenever I tried to use the typeset -F3, the variable is resulting with a "#".
In the given example below, I declared x to be a decimal holding 3 decimal places = 1.455. However whenever I tried to echo the $x, the resulting value... (9 Replies)
Hello all. This is my first post/question on this site.
I’m a new Systems Analyst with previous experience with BASH. Although now I'm using AIX, and I’m trying to get a feel for the Korn shell (for those of you that don’t know AIX only uses the KORN shell).
I hope I put this into the correct... (10 Replies)
Hi there.
I'm facing a strange & an intriguing behaviour with sed while replacing the tab character with a space reading from a file. It randomly works sometimes but mostly doesn't work.
Below is what's happening-
<tab> here is the actual literal tab.
user1> cat temp2
1<tab>2<tab>3 4... (2 Replies)
Can someone please explain the strange behaviour.. I was just trying a few things to learn awk..
in the below code when I start the braces in the same line, the output is as expected, when I start at next line, output is displayed twice.
Please see the file, code I tried and output below.
... (2 Replies)
Discussion started by: Kulasekar
2 Replies
LEARN ABOUT ULTRIX
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)