shell script
 

the shell script is like I have to increment r if file DAT00000r-* exists and also if DAT0000(r+1) exits then also i need to incement r. likr suppose r=71 I have three files DAT000071-000232,DAT000072-339,DAT000073-792791.then I want to make r=74. also there may be possibility that i file DAT000071-1798.job DAT000071-818.cut also exist with other files mentioned above. in this case also i want my r=74.

if i use :
for i in `(find . -name DAT*$r-*)`
do
r=$((r+1))
done

then it incements r by 5 as .job and .cut files are also dere. I want to increment it only once in presence of DAT000r-798 DAT000r-798.job DAT000r-798.cut.

what shud i do??
please post the soln as soon as possible. i need it quite urgently..
i'll be very thankful

You are incrementing r for each file found by find. You need to test somehow for the highest value of r in your filenames. Are they all sequentially numbered? If so, you may be able to sort them, extract the r value from the last filename, and increment it just once.

Or, you can create a sorted list of filenames and extract the starting value of r from the last filename, and then increment r one time.

@penguiniator:
no the files are not in sequence.If DAT909.6989.job DAT911.6989.job DAT909.6989.cut DAT913.6989 are there, then i need r to become 910 instead of 909 and next time it shud becom 912..

In that case, what you can do is use a sorted list of filenames. Starting with the lowest numbered pair of names, subtract the r values from each file name. If the difference is greater than 1, add one to the r value of the lesser of the two r values to get the value to use.

If the names are in a list sorted lowest to highest, compare files 0 and 1. Then 1 and 2, and so on until you find a pair of files who's r value difference is greater than one.

If you don't find any, add one to the r value of the last file name in the list.

Are you able to give us the exact format of the file names or does it change as you have from post #1 to post #4?

DAT000070-000000006 DAT000070-000000006.cut DAT000070-000000006.job files are exactly like this. here r=70.
DAT000075-000070709, DAT000073-000000006, DAT000070-000000006 DAT000070-000000006.cut DAT000070-000000006.job now i want to make r=71
then later
r=72
later r=74 as there is no file with r= 71 or 72 or 74