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Check if a file exists with certain prefix

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# 8  
Old 08-19-2008
Quote:
Originally Posted by gnsxhj
Hi Franklin52,
what i remember is the bash counts the number of the variable from 0, isn't it ?
so, I think that should be:
Code:
prefix=echo ${file:0:3}

Regards
You're right, thanks!

Regards
# 9  
Old 08-20-2008
Tools Check if a file exists with certain prefix Reply to Thread
hi redoubtable,

Thanks for your information.now the code is working fine but with if [ -a abc* ] not with [-f abc* ] .i dont know wy -f option is not working.

Thanks
Narasimharao.
# 10  
Old 08-20-2008
Question Check if a file exists with certain prefix Reply to Thread
Hi Franklin52,
"prefix=echo ${file:0:3}" when i am placing this code in my korn shell environment it is throwing a warning by saying "The specified substitution is not valid for this command". i think it is specific to evironment.
Can you please tell me the how would i write the same syntax in a korn shell enviroment?

Advanced thanks!!!!
Narasimharao.
# 11  
Old 08-20-2008
Quote:
Originally Posted by raoscb
hi redoubtable,

Thanks for your information.now the code is working fine but with if [ -a abc* ] not with [-f abc* ] .i dont know wy -f option is not working.

Thanks
Narasimharao.
-f works only for ordinary files. -a works for any file. I'm glad you found a solution.
# 12  
Old 08-20-2008
Quote:
Originally Posted by raoscb
Hi Franklin52,
"prefix=echo ${file:0:3}" when i am placing this code in my korn shell environment it is throwing a warning by saying "The specified substitution is not valid for this command". i think it is specific to evironment.
Can you please tell me the how would i write the same syntax in a korn shell enviroment?

Advanced thanks!!!!
Narasimharao.
Code:
prefix=`echo $file|sed 's/\(...\).*/\1/'`

or:

Code:
prefix=`echo $file|awk '{print substr($0,1,3)}'`

Regards
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