Year Month day from file name in shell script

awkscriptingshell-scripting

I hava file names like below

adn_DF9D_20140515_0001.log
adn_DF9D_20140515_0002.log
adn_DF9D_20140515_0003.log
adn_DF9D_20140515_0004.log
adn_DF9D_20140515_0005.log
adn_DF9D_20140515_0006.log
adn_DF9D_20140515_0007.log

i want get the year, Month, day from file name and create directories

Ex: [[ ! -d "$BASE_DIR/$year/$month/$day" ]] && mkdir -p "$BASE_DIR/$year/$month/$day";

How to achieve this and share the ideas/ script appreciate to you

Best Answer

If the file name is always like in your example you can use something like:

for x in *.log; do year=${x:9:4}; month=${x:13:2}; day=${x:15:2}; [[ ! -d "$year/$month/$day" ]] && mkdir -p "$year/$month/$day"; done

This substring extraction is available in bash, not sure about other shells.

Related Solutions

BASH Shell Scripting assistance, backup script extracts meta data from filename & moves file accordingly

Pure Bash Solution, using parameter expansion. See this for an explanation of PE.

foo='date-web2-v.7.052509.csv'
file=${foo%*.csv}
date=${file##*.}

month=${date:0:2}
day=${date:2:2}
year=${date:4:2}

I would probably use Perl for this and use parenthesis to capture what I want in groups from a regular expression.

Windows – script for win/dos to create folders from list of names in a file

One way is to open the list of names in word and do copy and replace. Replace ^p with ^pmkdir this will replace all carraige returns (^p) with a carriage return and the mkdir command. Then save it as a bat and run it. There's def a cleaner way to do this if its going to be used over and over, but this is quick quick.

Best Answer

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Windows – script for win/dos to create folders from list of names in a file

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