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advanced file renaming problem

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Old 08-01-2008
advanced file renaming problem
I know this is probably a question for the newbie forum, where it is also posted, but I thought maybe some of you pros might like to help me out anyway. Here is my problem:

I have to rename a batch of files that look like:
2001_0001.asc
2001_0002.asc
.
2001_0548.asc
2002_0184.asc
.
.
2006_0548.asc

The names are a date code, but they need to be altered such that 2001_0001.asc becomes 2000_183.asc, 2001_0184 becomes 2001_001, and 2006_0548.asc becomes 2006_365.asc.

so, I think it should start like:

for i in `ls*`
do

then things get a bit hazy
I will now convert to semi-programing speak

split aaaa_bbbb.asc into aaaa and bbbb
interpret strings aaaa and bbbb as numbers x and y respectively
if y - 183 < 1,
then x' = x - 1 and y' = y - 183 + 365,
else x' = x and y' = y - 183.
convert numbers x and y to strings aaaa' and bbb' (note the three digits
in bbb such that y' = 1 will convert to bbb' = 001)
rename file i to aaaa'_bbb'.asc

any help would be appreciated
thanks,
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abrt-dump-oops

ABRT-DUMP-OOPS(1)						    ABRT Manual 						 ABRT-DUMP-OOPS(1)

NAME

       abrt-dump-oops - Extract oops from FILE (or standard input)

SYNOPSIS

       abrt-dump-oops [-vusoxtm] [-d DIR]/[-D] [FILE]

DESCRIPTION

       This tool creates problem directory from, updates problem directory with or prints oops extracted from FILE or standard input.

OPTIONS

       -v, --verbose
	   Be more verbose. Can be given multiple times.

       -s
	   Log to syslog

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	   Print found oopses on standard output

       -d DIR
	   Create new problem directory in DIR for every oops found

       -D
	   Same as -d DumpLocation, DumpLocation is specified in abrt.conf

       -u PROBLEM
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	   Make the problem directory world readable. Usable only with -d/-D

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SEE ALSO

       abrt-watch-log(1), abrt.conf(5)

AUTHORS

       o   ABRT team

abrt 2.1.11							    06/18/2014							 ABRT-DUMP-OOPS(1)