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Bash variables

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# 1  
Old 03-19-2008
Bash variables
Ummm can anybody help me with this one?

Its prob quite simple.

I bascially have a file name say J1x2x3x7.dat

Im using the file name as a variable in a bash script. Want I want to do is extract most of the file name and make it a new variable expect with say one of the number now a wildcard, so have something like J1x*x3x7.dat as my new file name?

Can this be easily done. I'm sure it can smile.gif ?
# 2  
Old 03-19-2008
Yes, asterisks are permitted in filenames on most UNIX systems. However, using an asterisk in a filename is a really bad idea for lots of reasons and is generally avoided. Note that POSIX filenames cannot contain asterisks.
# 3  
Old 03-19-2008
Quote:
Originally Posted by RichieFondel
Ummm can anybody help me with this one?

Its prob quite simple.

I bascially have a file name say J1x2x3x7.dat

Im using the file name as a variable in a bash script. Want I want to do is extract most of the file name and make it a new variable expect with say one of the number now a wildcard, so have something like J1x*x3x7.dat as my new file name?

Can this be easily done. I'm sure it can smile.gif ?

Code:
file=J1x2x3x7.dat
newfile=J1x*x3x7.dat
mv "$file" "$newfile"

However, be aware that such a filename can cause problems.

See the POSIX standard for portable filenames:
General Concepts: Filenames
Definitions: Portable Filename Character Set

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