Classificar os resultados do subconjunto de encontros e agarrar (Bash)

StackOverflow https://stackoverflow.com/questions/2300387

  •  21-09-2019
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Pergunta

eu tenho um Par de scripts bash, 1 que despeja o mysql dbs e o segundo para purgar backups antigos.

Eu sempre confiei na data, para que os arquivos com mais de 7 dias sejam purgados e novos backups criados diariamente. O resultado foi um conjunto de backups 7 dias atrás.

Bem agora que eu tenho mais de 20 dbs Eu separei esse trabalho diário em um trabalho diário e semanal. Se eu continuar a usar o método de localização e data, perderia a semana passada.

PERGUNTA

Como posso classificar a saída de uma descoberta por data e depois purgar todos, exceto os 7 mais recentes. (Portanto, mesmo que o mais recente tenha 2 meses de idade, permanece)

Isso é o mais longe que cheguei, mas não é o esperado. Talvez o uso de LS possa ser a melhor escolha 9Find é um remanescente de usar a data como o único critério para purgar)

OLDFILES=`find -regex .*sql.*`

set -- $OLDFILES

if [ -z $1 ]
then
    printf "\tNo files matching purge criteria\n" | tee -a $LOGFILE
else
    printf "\tSQL Files being Delete from $HERE\n" | tee -a $LOGFILE
    printf "\t\t%s\n" $OLDFILES  | tee -a $LOGFILE
fi
# $RETAIN is the # of recent to keep
# so I want to grab a subset from 0 to (total - retain), and purge them
TOBURN=$(( $# - $RETAIN ))
printf " grab first %s files. %s  - %s" $TOBURN $# $RETAIN
if [ $TOBURN -gt 0 ]
then
    TOPURGE=("$@:0:$TOBURN")
    printf "\n\nREMOVING..\n\t\t%s\n" $TOPURGE
fi

Arquivos existentes

            ./webbmaster_bellarose_joomla_01-09-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-25-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-10-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-04-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-25-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-29-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-30-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-28-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-06-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-13-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-24-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-21-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-24-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-27-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-26-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-17-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-03-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-21-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-20-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-16-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-31-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-11-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-05-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-14-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-22-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-12-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-17-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-18-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-20-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-08-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-22-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-27-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-23-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-07-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-26-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-19-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-29-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-15-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-28-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-01-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-18-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-02-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-23-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-19-2009.sql.gz

Alvos para purga (que eu quero definir em variável para RM simples -f $ var)

            ./webbmaster_bellarose_joomla_01-09-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-25-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-10-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-04-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-30-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-28-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-06-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-13-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-21-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-24-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-27-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-17-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-03-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-21-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-20-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-16-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-31-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-11-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-05-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-14-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-22-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-12-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-17-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-18-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-20-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-08-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-22-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-23-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-07-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-26-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-19-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-29-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-15-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-01-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-18-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-02-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-19-2009.sql.gz

(Datas 1/23 - 1/29 são deixadas intactas)

Foi útil?

Solução

Por favor, faça você mesmo (e todos os outros) um grande favor e comece a escrever datas em ISO-8601 Formato (ou seja, AAAA-MM-DD).

Por exemplo, em vez de

./webbmaster_bellarose_joomla_12-29-2009.sql.gz

você teria

./webbmaster_bellarose_joomla_2009-12-29.sql.gz

Fazendo isso muitos benefícios, o mais importante aqui que a ordem cronológica e alfabética se torna idêntica. Não há necessidade de encontrar, basta listar os arquivos, reverter o pedido, excluir as 7 primeiras linhas e excluir todos os arquivos restantes:

ls *sql* | tac | sed 1,7d | tr '\012' '\000' | xargs -0 --no-run-if-empty rm

ATUALIZAÇÃO: O que você quer dizer com "avançar"? Por mais que eu possa dizer que minha solução resolve seu problema 100%:

/tmp/so>cat existing_files
./webbmaster_bellarose_joomla-2009-12-17.sql.gz
./webbmaster_bellarose_joomla-2009-12-18.sql.gz
./webbmaster_bellarose_joomla-2009-12-19.sql.gz
./webbmaster_bellarose_joomla-2009-12-20.sql.gz
./webbmaster_bellarose_joomla-2009-12-21.sql.gz
./webbmaster_bellarose_joomla-2009-12-22.sql.gz
./webbmaster_bellarose_joomla-2009-12-23.sql.gz
./webbmaster_bellarose_joomla-2009-12-24.sql.gz
./webbmaster_bellarose_joomla-2009-12-25.sql.gz
./webbmaster_bellarose_joomla-2009-12-26.sql.gz
./webbmaster_bellarose_joomla-2009-12-27.sql.gz
./webbmaster_bellarose_joomla-2009-12-28.sql.gz
./webbmaster_bellarose_joomla-2009-12-29.sql.gz
./webbmaster_bellarose_joomla-2009-12-30.sql.gz
./webbmaster_bellarose_joomla-2009-12-31.sql.gz
./webbmaster_bellarose_joomla-2010-01-01.sql.gz
./webbmaster_bellarose_joomla-2010-01-02.sql.gz
./webbmaster_bellarose_joomla-2010-01-03.sql.gz
./webbmaster_bellarose_joomla-2010-01-04.sql.gz
./webbmaster_bellarose_joomla-2010-01-05.sql.gz
./webbmaster_bellarose_joomla-2010-01-06.sql.gz
./webbmaster_bellarose_joomla-2010-01-07.sql.gz
./webbmaster_bellarose_joomla-2010-01-08.sql.gz
./webbmaster_bellarose_joomla-2010-01-09.sql.gz
./webbmaster_bellarose_joomla-2010-01-10.sql.gz
./webbmaster_bellarose_joomla-2010-01-11.sql.gz
./webbmaster_bellarose_joomla-2010-01-12.sql.gz
./webbmaster_bellarose_joomla-2010-01-13.sql.gz
./webbmaster_bellarose_joomla-2010-01-14.sql.gz
./webbmaster_bellarose_joomla-2010-01-15.sql.gz
./webbmaster_bellarose_joomla-2010-01-16.sql.gz
./webbmaster_bellarose_joomla-2010-01-17.sql.gz
./webbmaster_bellarose_joomla-2010-01-18.sql.gz
./webbmaster_bellarose_joomla-2010-01-19.sql.gz
./webbmaster_bellarose_joomla-2010-01-20.sql.gz
./webbmaster_bellarose_joomla-2010-01-21.sql.gz
./webbmaster_bellarose_joomla-2010-01-22.sql.gz
./webbmaster_bellarose_joomla-2010-01-23.sql.gz
./webbmaster_bellarose_joomla-2010-01-24.sql.gz
./webbmaster_bellarose_joomla-2010-01-25.sql.gz
./webbmaster_bellarose_joomla-2010-01-26.sql.gz
./webbmaster_bellarose_joomla-2010-01-27.sql.gz
./webbmaster_bellarose_joomla-2010-01-28.sql.gz
./webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so>cat targets_for_purging
./webbmaster_bellarose_joomla-2009-12-17.sql.gz
./webbmaster_bellarose_joomla-2009-12-18.sql.gz
./webbmaster_bellarose_joomla-2009-12-19.sql.gz
./webbmaster_bellarose_joomla-2009-12-20.sql.gz
./webbmaster_bellarose_joomla-2009-12-21.sql.gz
./webbmaster_bellarose_joomla-2009-12-22.sql.gz
./webbmaster_bellarose_joomla-2009-12-23.sql.gz
./webbmaster_bellarose_joomla-2009-12-24.sql.gz
./webbmaster_bellarose_joomla-2009-12-25.sql.gz
./webbmaster_bellarose_joomla-2009-12-26.sql.gz
./webbmaster_bellarose_joomla-2009-12-27.sql.gz
./webbmaster_bellarose_joomla-2009-12-28.sql.gz
./webbmaster_bellarose_joomla-2009-12-29.sql.gz
./webbmaster_bellarose_joomla-2009-12-30.sql.gz
./webbmaster_bellarose_joomla-2009-12-31.sql.gz
./webbmaster_bellarose_joomla-2010-01-01.sql.gz
./webbmaster_bellarose_joomla-2010-01-02.sql.gz
./webbmaster_bellarose_joomla-2010-01-03.sql.gz
./webbmaster_bellarose_joomla-2010-01-04.sql.gz
./webbmaster_bellarose_joomla-2010-01-05.sql.gz
./webbmaster_bellarose_joomla-2010-01-06.sql.gz
./webbmaster_bellarose_joomla-2010-01-07.sql.gz
./webbmaster_bellarose_joomla-2010-01-08.sql.gz
./webbmaster_bellarose_joomla-2010-01-09.sql.gz
./webbmaster_bellarose_joomla-2010-01-10.sql.gz
./webbmaster_bellarose_joomla-2010-01-11.sql.gz
./webbmaster_bellarose_joomla-2010-01-12.sql.gz
./webbmaster_bellarose_joomla-2010-01-13.sql.gz
./webbmaster_bellarose_joomla-2010-01-14.sql.gz
./webbmaster_bellarose_joomla-2010-01-15.sql.gz
./webbmaster_bellarose_joomla-2010-01-16.sql.gz
./webbmaster_bellarose_joomla-2010-01-17.sql.gz
./webbmaster_bellarose_joomla-2010-01-18.sql.gz
./webbmaster_bellarose_joomla-2010-01-19.sql.gz
./webbmaster_bellarose_joomla-2010-01-20.sql.gz
./webbmaster_bellarose_joomla-2010-01-21.sql.gz
./webbmaster_bellarose_joomla-2010-01-22.sql.gz
/tmp/so>sed 's/\(.\{29\}\)_\(..-..\)-\(....\)/\1-\3-\2/' existing_files | sort > existing_files.8601
/tmp/so>sed 's/\(.\{29\}\)_\(..-..\)-\(....\)/\1-\3-\2/' targets_for_purging | sort > targets_for_purging.8601
/tmp/so>mkdir files
/tmp/so>cd files
/tmp/so/files>xargs touch < ../existing_files.8601
/tmp/so/files>ls -1
webbmaster_bellarose_joomla-2009-12-17.sql.gz
webbmaster_bellarose_joomla-2009-12-18.sql.gz
webbmaster_bellarose_joomla-2009-12-19.sql.gz
webbmaster_bellarose_joomla-2009-12-20.sql.gz
webbmaster_bellarose_joomla-2009-12-21.sql.gz
webbmaster_bellarose_joomla-2009-12-22.sql.gz
webbmaster_bellarose_joomla-2009-12-23.sql.gz
webbmaster_bellarose_joomla-2009-12-24.sql.gz
webbmaster_bellarose_joomla-2009-12-25.sql.gz
webbmaster_bellarose_joomla-2009-12-26.sql.gz
webbmaster_bellarose_joomla-2009-12-27.sql.gz
webbmaster_bellarose_joomla-2009-12-28.sql.gz
webbmaster_bellarose_joomla-2009-12-29.sql.gz
webbmaster_bellarose_joomla-2009-12-30.sql.gz
webbmaster_bellarose_joomla-2009-12-31.sql.gz
webbmaster_bellarose_joomla-2010-01-01.sql.gz
webbmaster_bellarose_joomla-2010-01-02.sql.gz
webbmaster_bellarose_joomla-2010-01-03.sql.gz
webbmaster_bellarose_joomla-2010-01-04.sql.gz
webbmaster_bellarose_joomla-2010-01-05.sql.gz
webbmaster_bellarose_joomla-2010-01-06.sql.gz
webbmaster_bellarose_joomla-2010-01-07.sql.gz
webbmaster_bellarose_joomla-2010-01-08.sql.gz
webbmaster_bellarose_joomla-2010-01-09.sql.gz
webbmaster_bellarose_joomla-2010-01-10.sql.gz
webbmaster_bellarose_joomla-2010-01-11.sql.gz
webbmaster_bellarose_joomla-2010-01-12.sql.gz
webbmaster_bellarose_joomla-2010-01-13.sql.gz
webbmaster_bellarose_joomla-2010-01-14.sql.gz
webbmaster_bellarose_joomla-2010-01-15.sql.gz
webbmaster_bellarose_joomla-2010-01-16.sql.gz
webbmaster_bellarose_joomla-2010-01-17.sql.gz
webbmaster_bellarose_joomla-2010-01-18.sql.gz
webbmaster_bellarose_joomla-2010-01-19.sql.gz
webbmaster_bellarose_joomla-2010-01-20.sql.gz
webbmaster_bellarose_joomla-2010-01-21.sql.gz
webbmaster_bellarose_joomla-2010-01-22.sql.gz
webbmaster_bellarose_joomla-2010-01-23.sql.gz
webbmaster_bellarose_joomla-2010-01-24.sql.gz
webbmaster_bellarose_joomla-2010-01-25.sql.gz
webbmaster_bellarose_joomla-2010-01-26.sql.gz
webbmaster_bellarose_joomla-2010-01-27.sql.gz
webbmaster_bellarose_joomla-2010-01-28.sql.gz
webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so/files>ls *sql* | tac | sed 1,7d | tr '\012' '\000' | xargs -0 --no-run-if-empty rm
/tmp/so/files>ls -1 ./*
./webbmaster_bellarose_joomla-2010-01-23.sql.gz
./webbmaster_bellarose_joomla-2010-01-24.sql.gz
./webbmaster_bellarose_joomla-2010-01-25.sql.gz
./webbmaster_bellarose_joomla-2010-01-26.sql.gz
./webbmaster_bellarose_joomla-2010-01-27.sql.gz
./webbmaster_bellarose_joomla-2010-01-28.sql.gz
./webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so/files>comm -3 ../existing_files.8601 ../targets_for_purging.8601
./webbmaster_bellarose_joomla-2010-01-23.sql.gz
./webbmaster_bellarose_joomla-2010-01-24.sql.gz
./webbmaster_bellarose_joomla-2010-01-25.sql.gz
./webbmaster_bellarose_joomla-2010-01-26.sql.gz
./webbmaster_bellarose_joomla-2010-01-27.sql.gz
./webbmaster_bellarose_joomla-2010-01-28.sql.gz
./webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so/files>

Outras dicas

Se os arquivos estiverem todos em um diretório (ou seja, você não precisar usar o encontro para recorrer, por subdiretórios), você poderá usar o argumento -t para ls (1) para solicitar a lista de arquivos por tempo e depois remover as 7 primeiras entradas com cauda (1).

rm -f $(ls -t *sql* | tail -n +8)

Editar: eu adicionei -F caso a substituição resulte em uma lista vazia

ou em um loop ...

ls -t *sql* | tail -n +8 | while read file
    echo "Purging: $file"
    rm "$file"
done

O argumento da cauda é +8 porque você deseja que ele comece a fazer a 8ª linha em diante (ou seja, soltar os 7 primeiros).

Depois de remover os arquivos, você pode queimar o que resta.

OLDIFS="$IFS"
IFS=$'\n'
topurge=($(find -mindepth 1 -printf "%T@ %P\n" | sort -n -r | cut -d' ' -f 2- | tail -n +7))
IFS="$OLDIFS"

Aqui está um pensamento:

oldest_to_keep=`find . -name \*.sql | xargs \ls -1rc | tail -7 | head -1`
find . -name \*.sql -not -samefile $oldest_to_keep -not -newer $oldest_to_keep

Onde o segundo achado deve ter -exec rm \{\} ; Se você se convenceu, isso é sensato. :)

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