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Expr problem and other basic problems


 
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# 8  
Old 10-21-2009
Quote:
Originally Posted by killerqb
Sorry, should have clarified, I meant on the two read variables it gives me not a valid identifier

Did you write the script on a Windows box? If so, remove the carriage return from the end of each line.
# 9  
Old 10-21-2009
bourne shell
# 10  
Old 10-21-2009
Quote:
Originally Posted by scottn
What shell are you using?

and if I may add...

Stop using backticks ` ! (unless you're using CSH, in which case stop using CSH!)

Use $( .... )

i.e. this=$(that)
not this=`that`

It's more standard, and a whole lot more readable.

The backticks are no less standard than $( ... ).
See Shell Command Language
# 11  
Old 10-21-2009
yes I am using cygwin so it is windows, what is the command to eliminate the \r
# 12  
Old 10-21-2009
Quote:
Originally Posted by killerqb
yes I am using cygwin so it is windows, what is the command to eliminate the \r

Code:
tr -d '\r' < FILENAME > NEWFILENAME

Or:

Code:
sed 's/\r$//' FILENAME > NEWFILENAME

Better would be to use a text editor that allows you to save the file without the CRs.
# 13  
Old 10-21-2009
Quote:
Originally Posted by cfajohnson

The backticks are no less standard than $( ... ).
See Shell Command Language
Sorry, I use AIX, so I generally believe what's relevant for me, not what may or may not be "standard of the week".

Help -
# 14  
Old 10-21-2009
Quote:
Originally Posted by scottn
Sorry, I use AIX, so I generally believe what's relevant for me, not what may or may not be "standard of the week".

The standard is (as I have pointed out before) defined by the Open Group. It is not a "standard of the week". It was updated last year; the previous update was a decade or so earlier.
Quote:

When talking about a standard, it helps to refer to the document that defines that standard, not to something that may or may not be correct.

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