|
|
Sponsored Content
Top Forums
Shell Programming and Scripting
variable not retaining value
Post 89896 by Perderabo on Wednesday 16th of November 2005 04:47:00 PM
11-16-2005
Pretty cool, huh? The bourne shell uses a subshells every now and then, like for your loop. When the loop is finished, the subshell exits, and the variables disappear like magic. Not only does the superfluous subshell process consume extra resources, it helps make the language nice and unpredictable. The bourne shell has lots more cool surprises like this, so expect a wild ride. 
|
|
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Here's is an example of what I want to do:
var1="Horse "
var2="Cat "
var3="Fish "
for animals in "$var1" "$var2" "$var3"
do
set $animals
pet=$1
## Ok, now I want to get the values of $pet, but
## I want to retain the full length it was... (3 Replies)
Discussion started by: app4dxh
3 Replies
2. Shell Programming and Scripting
I have problem like this :
while loop
1 var=some expression
2 if then
3 Do something
4 oldVar=$var
5 fi
6 done
Then, I am facing error at line number 2, mentioning invalid argument. Can anyone please help me for, How to retain value in oldVar? (4 Replies)
Discussion started by: videsh77
4 Replies
3. Linux
Hi all,
I wrote a shell script in which one of the if condition i tried to set few variables and exported them...and when i am out of if condition i wish to run one of my script which uses those variables exported.
But i found that when i am out of the if statement those variables... (5 Replies)
Discussion started by: priya444
5 Replies
4. UNIX for Dummies Questions & Answers
Hi Experts,
I have a 2 GB flat file which have unicode field, some of them are blanks and its size is 4000 character. In the existing system SED command removes the spaces. Because of this field itself....it is taking almost three days to complete the file processing. I removed sed and... (0 Replies)
Discussion started by: RcR
0 Replies
5. Shell Programming and Scripting
hi all,
Is there any way to retain file path?
echo "Please enter your old filename"
read a
#user input : /blah/blah1
echo "please enter the new filename"
read b
#user input : dumb
mv $a $b
What i would like to do is for the user to enter just the "filename" for the new filename... (2 Replies)
Discussion started by: c00kie88
2 Replies
6. Shell Programming and Scripting
Hi All,
As per my understanding, value of variable is retained outside function.
But the value of array myarrayDriver is not retained outside function. Could you please tell the reason for the same..
code:
readingConfigFile()
{
search_keyword="$1"
i=0
for pointer in $(cat... (7 Replies)
Discussion started by: ajincoep
7 Replies
7. Shell Programming and Scripting
Hello.
I'm trying to add multiple numbers with varying length and with leading zeroes in it. However, I'm getting the sum (totalHashAccountNumber) without the leading zeroes in it. How do I retain the leading zeroes?
Please pardon the lengthy code.. I'm getting the hash account number from 2... (2 Replies)
Discussion started by: udelalv
2 Replies
8. Shell Programming and Scripting
Hi,
I use Korn Shell. Searched Forum and modified the way the file is input to the while loop, but still the variable does not seem to be retaining the final count.
while read name
do
Tmp=`echo $name | awk '{print $9 }'`
Count=`cat $Tmp | wc -l`... (6 Replies)
Discussion started by: justchill
6 Replies
9. Shell Programming and Scripting
There's an input file(input.txt) which has the following details :
CBA
BA
<Please note the second record has a LEADING WHITESPACE which is VALID>
I am using the following code to read the content of the said file line by line:
while read p ; do
echo "$p"
done < input.txt
This is the... (1 Reply)
Discussion started by: kumarjt
1 Replies
10. Shell Programming and Scripting
Hi,
I m new to shell scripting. I did some research and understand that unix treats while and other loops as new shell and hence the variable loose its value outside of the loop.
I found solution for integer variable but in mycase this is a string variable.
here variable loc is a... (6 Replies)
Discussion started by: knowyrtech
6 Replies
LEARN ABOUT SUNOS
continue
break(1) User Commands break(1) NAME
break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until loop SYNOPSIS
sh break [n] continue [n] csh break continue ksh *break [n] *continue [n] DESCRIPTION
sh The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels. The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop. csh The break utility resumes execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line. The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop. ksh The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified, then break n levels. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be exited. The continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n- th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words that follow a command preceded by ** that are in the format of a variable assignment are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera- tion are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), exit(1), ksh(1), sh( 1), attributes(5) SunOS 5.10 17 Jul 2002 break(1)