Finding gaps with 'ls' or some other command

mijohnst · 01-07-2006, 10:32 PM

I'm trying to figure out how to find the gaps in a list of file in one of my directories. I have a list of file from 001.txt to 799.txt and I'm trying to figure out how to find any gap in numbers besides counting them one by one.

Anyone know of a way I can do this?

T.Hsu · 01-08-2006, 01:39 AM

for i in `seq -w 001 799`
do
if test ! -f $i.txt; then
echo "$i.txt is missing"
fi
done

Cirdan · 01-08-2006, 02:26 AM

Quote:

Originally Posted by T.Hsu

for i in `seq -w 001 799`
do
if test ! -f $i.txt; then
echo "$i.txt is missing"
fi
done

Don't you just love shell scripting

Thanks for the code, I was wondering how you wouldaccomplish this also.

T.Hsu · 01-08-2006, 07:32 AM

Sorry for my poor English comprehension

, "gap in numbers" means numerical range like "005 - 010"? then;

Code:

#!/bin/bash
num1=1
num2=$[num1+1]

while [[ num1 -lt 799 ]] ; do
	if [ ! -f `printf "%003d" $num1`.txt ]; then
		until [ -f `printf "%003d" $num2`.txt ]; do
		num2=$[num2+1]
		done
		if [ $num1 != $[num2-1] ]; then
		echo `printf "%003d" $num1`.txt to `printf "%003d" $[num2-1]`.txt are missing.
		else
		echo `printf "%003d" $num1`.txt is missing.
		fi
		num1=$num2
	fi
	num1=$[num1+1]
	num2=$[num1+1]
done

mijohnst · 01-08-2006, 09:49 PM

You all are awesome... Thank you so much!

mijohnst · 01-09-2006, 04:59 PM

I was looking for a way to do the same to directories... I changed the -f to -d and worked great! Thanks so much!