Show file name included time information


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# 1  
Show file name included time information

Hi all,

I have many files included time information, some of them included time range by 30 minutes;


Code:
2007-12-27T110000.txt
2007-12-27T120000.txt
2007-12-27T130000.txt
2007-12-27T150000.txt
2007-12-27T153000.txt
2007-12-28T000000.txt
2007-12-28T003000.txt


I only want to echo that if two files are in the range by 30 minutes like;

Code:
2007-12-27T150000.txt
2007-12-27T153000.txt
2007-12-28T000000.txt
2007-12-28T003000.txt


Please help!
Thanks

Last edited by Scrutinizer; 11-17-2018 at 07:08 PM.. Reason: code tags
# 2  
How about
Code:
$ for FN in 2007*.txt; do T1=${FN#*T}; T1=${T1%.*}; if (( T1 - 3000 < T2)); then echo $FN, $OFN; fi; OFN=$FN; T2=$T1; done
2007-12-28T000000.txt, 2007-12-27T153000.txt
2007-12-28T003000.txt, 2007-12-28T000000.txt

as a starting point?
# 3  
Quote:
Originally Posted by RudiC
How about
Code:
$ for FN in 2007*.txt; do T1=${FN#*T}; T1=${T1%.*}; if (( T1 - 3000 < T2)); then echo $FN, $OFN; fi; OFN=$FN; T2=$T1; done
2007-12-28T000000.txt, 2007-12-27T153000.txt
2007-12-28T003000.txt, 2007-12-28T000000.txt

as a starting point?

I tried but nothing appeared.


I am very new at unix. Please help Smilie
# 4  
No error msgs, obviously. Pls post the directory listing. Run the proposal witrh the -x (xtrace) option set, and post the output. What's your shell version?
# 5  
Quote:
Originally Posted by RudiC
No error msgs, obviously. Pls post the directory listing. Run the proposal witrh the -x (xtrace) option set, and post the output. What's your shell version?
Thank you
It works but it is not in the true order.

2007-12-28T000000.txt, 2007-12-27T153000.txt
2007-12-28T003000.txt, 2007-12-28T000000.txt


I want to files only like below;

2007-12-28T000000.txt, 2007-12-27T150000.txt
2007-12-28T003000.txt, 2007-12-27T153000.txt
# 6  
So - what did you change from post#3 to #5?


Date / time arithmetic is among the ugliest problems in IT. Try this slightly adapted version that IS NOT PREPARED to cross midnight:

Code:
for FN in 2007*.txt; do T1=${FN#*T}; T1=${T1%.*}; if (( T1 - 3000 <= T2)); then echo $OFN$'\n'$FN; fi; OFN=$FN; T2=$T1; done
2007-12-27T150000.txt
2007-12-27T153000.txt
2007-12-27T153000.txt
2007-12-28T000000.txt
2007-12-28T000000.txt
 2007-12-28T003000.txt


EDIT: seems to cross midnight, but is far from robust:



Code:
for FN in 2007*.txt; do T1=${FN#*T}; T1=${T1%.*}; if (( (240000 + 10#$T1 - 10#$T2) % 240000 <= 3000)); then echo $OFN$'\n'$FN; fi; OFN=$FN; T2=$T1; done
2007-12-27T150000.txt
2007-12-27T153000.txt
2007-12-28T000000.txt
2007-12-28T003000.txt


Last edited by RudiC; 11-19-2018 at 07:04 PM..
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