CODEWITHSUNDEEP
bash
siddhant Rawat
siddhant Rawat

Reputation: 15

Usage of for loop and if statement in bash

I am using the following code but the final 'echo $dirname' is giving empty output on console

for folderpath in find /u01/app/SrcFiles/commercial/ngdw/* -name "IQ*"; do folder_count=ls -d $folderpath/* | wc -l echo -e "Total Date folder created : $folder_count in $folderpath \n"

if [ $folder_count -ne 0 ];
then
    for dirpath in `find $folderpath/* -name "2*" `;
    do  
        dirname=${dirpath##*/}
        (( dirname <= 20210106 )) || continue
        echo $dirname 
        
    done
fi

done

Upvotes: 1

Views: 74

Answers (3)

Fravadona
Fravadona

Reputation: 16905

First I would calculate the date it was 3 months ago with the date command:

# with GNU date (for example on Linux)
mindate=$(date -d -3month +%Y%m%d)

# with BSD date (for example on macOS)
mindate=$(date -v -3m +%Y%m%d)

Then I would use a shell arithmetic comparison for determining the directories to remove:

# for dirpath in "$directory"/*
for dirpath in "$directory"/{20220310,20220304,20220210,20220203,20210403,20210405}
do
    dirname=${dirpath##*/}

    (( dirname <= mindate )) || continue

    echo "$dirpath"
    # rm -rf "$dirpath"
done

Upvotes: 1

Dudi Boy
Dudi Boy

Reputation: 4865

Suggesting to find which are the directories that created before 90 days ago or older, with find command.

 find . -type d -ctime +90

If you want to find which directories created 90 --> 100 days ago.

 find . -type d -ctime -100 -ctime +90

Once you have the correct folders list. Feed it to the rm command.

 rm -rf $(find . -type d -ctime +90)

Upvotes: 0

Barmar
Barmar

Reputation: 780871

== doesn't do wildcard matching. You should do that in the for statement itself.

There's also no need to put * at the beginning of the wildcard, since the year is at the beginning of the directory name, not in the middle.

for i in "$directory"/202104*; do
    if [ -d "$i" ]; then
        echo "$i"
        rm -rf "$i"
    fi
done

The if statement serves two purposes:

  1. If there are no matching directories, the wildcard expands to itself (unless you set the nullglob option), and you'll try to remove this nonexistent directory.
  2. In case there are matching files rather than directories, they're skipped.

Upvotes: 0

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