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Copy files help needed

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# 1  
Old 02-26-2008
Copy files help needed
Guys,
I am new to scripting. I need help in the following

I have some files like

ls -1
file_5001_1.payor.txt
file_5001_1.addr.txt

I basically need to copy to another files with same format except replacing 5001 with 5006.

output
ls -1
file_5001_1.payor.txt
file_5001_1.addr.txt
file_5006_1.payor.txt
file_5006_1.addr.txt

Please help!
jak
# 2  
Old 02-26-2008
Here's one way:

Code:
for i in *.txt
do
    cp ${i} `echo ${i} | sed 's/5001/5006/g'`
done

# 3  
Old 02-26-2008
Thanks for your help! I will try it out

jak
# 4  
Old 02-26-2008
An alternative solution, this time using just the shell, without the help of external programs (except by the cp program, of course):

PHP Code:
for file in *5001*; do cp $file ${file/01/06};done 
the key here is the ${//} shell's parameter expansion operator:

extracted from GNU Bash man page:

Quote:
${parameter/pattern/string}
${parameter//pattern/string}
The pattern is expanded to produce a pattern just as in pathname expansion. Parameter is expanded and the longest match of pattern against its value is
replaced with string. In the first form, only the first match is replaced. The second form causes all matches of pattern to be replaced with string.
If pattern begins with #, it must match at the beginning of the expanded value of parameter. If pattern begins with %, it must match at the end of the
expanded value of parameter. If string is null, matches of pattern are deleted and the / following pattern may be omitted. If parameter is @ or *, the
substitution operation is applied to each positional parameter in turn, and the expansion is the resultant list. If parameter is an array variable sub-
scripted with @ or *, the substitution operation is applied to each member of the array in turn, and the expansion is the resultant list.
this operator is available on the Korn Shell to.
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