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Shell Programming and Scripting

Problem with character by character reading

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# 1  
Old 05-06-2012
Problem with character by character reading
Hi friend,
i have the following problem:
when i am writting the below command on the command prompt , its working.
Code:
while read -n 1 ch; do echo "$ch" ; echo "$ch" ; done<file_name.out.

but when i am executing it after saving it in a ksh file, its not working.
Please helppppppppp .. thankss in advance
Last edited by jim mcnamara; 05-06-2012 at 12:18 PM.. Reason: code tags
# 2  
Old 05-06-2012
What is not working? What output do you get? What is your input?
# 3  
Old 05-06-2012
read -n 1 is a bash-ism. ksh88 does not support it.

Care to tell us what 'does not work' means?
# 4  
Old 05-06-2012
@ scrutinizer : i am getting the error as dirty read . input is a simple text file.
@jim mcnamara : i am getting error as dirty read . can you please tel me the korn shell equivalent of the above command?

Thanks a lot guys in advance
# 5  
Old 05-06-2012
What is the exact error?
# 6  
Old 05-07-2012
the exact error is : read: bad option(s)
can you please tel me the korn shell equivalent of the above command?

thanks in advance Smilie
# 7  
Old 05-07-2012
This can be used in a recent ksh93, but not in older version, nor in ksh88. What OS and version are you using and what is your ksh version? It would appear to be ksh88.
Last edited by Scrutinizer; 05-07-2012 at 03:55 AM..
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