Script

Il y a quelques années, j'avais fait un petit script pour gérer nos sauvegardes sur un serveur. Il faudrait certainement changer le parser la date dans le nom du fichier pour que ça fonctionne mais le script permettait de garder toutes les sauvegardes de la semaine, 1 sauvegarde par semaine pour les semaines précédentes la semaine en cours, 1 sauvegarde par mois pour les mois précédents le mois en cours.

Il y a certainement beaucoup à redire et à améliorer sur l'écrire du script mais de mémoire, c'était fonctionnel.

#!/bin/bash
# title : smartbackupmanagement.sh
# description : This program was designed to smartly manage backup files.
# It keeps files of the current week then 1 file per week for
# the current month and 1 file per month for the current year.
# Backup files must have the date in their file names and not
# any other numeric character.
# author : Nicolas
# date : 20140306 initial release
# : 20140312 allow spaces in file/path name
# : 20140314 files are deleted with OK/NOK echoed
# date is extracted from basename
# : 20150203 changed command to get last day of the month
# version : 0.31
# usage : ./smartbackupmanagement.sh
# notes :
# bash_version : 4.2.10(1)-release
# TODO : - do yearly backup management (keep only last backup of the
# year
#============================================================================
# Directory where backup files are stored
BACKUP_DIRECTORY=1ドル
# save current date details and delete initial 0 if any
CURRENT_WEEK=`date +%W | sed 's/^0*//'`
CURRENT_MONTH=`date +%m | sed 's/^0*//'`
CURRENT_YEAR=`date +%Y | sed 's/^0*//'`
# Function to check if the date is the last day of the month
# 1ドル = year
# 2ドル = month
# 3ドル = day
function is_last_day_month
{
 # find the last day of the month
 last_day=`cal 2ドル 1ドル | egrep "28|29|30|31" | fmt -1 | tail -1`
 if [ 3ドル -eq $last_day ] ; then
 # this is the last day of the month
 return 0
 else
 # remove backup
 return 1
 fi
}
# Function when weeks are different
# 1ドル = file name
# 2ドル = day of the week
function different_weeks
{
 # check if day of the week is Sunday (day 0)
 if [ 2ドル -eq 0 ] ; then
 # keep backup of the week
 #echo Keep file as weekly backup
 keep_backup_file "1ドル"
 else
 # remove backup
 delete_backup_file "1ドル"
 fi
}
# Function when months are different
# 1ドル = file name
# 2ドル = day of the backup
# 3ドル = month of the backup
function different_months
{
 # check if it's the last day of the month
 if is_last_day_month $CURRENT_YEAR 3ドル 2ドル ; then
 # this is the last day of the month
 #echo Keep file as monthly backup
 keep_backup_file "1ドル"
 else
 # remove backup
 delete_backup_file "1ドル"
 fi
}
# Function when years are different
# TODO
function different_years
{
 #echo different years
 :
}
# Function to keep current file
function keep_backup_file
{
 # keep current file
 #echo Keep file 1ドル
 :
}
# Function to delete current file
# 1ドル = filename
function delete_backup_file
{
 # delete current file
 #echo "Delete file\t 1ドル"
 rm 1ドル
 if [ $? -eq 0 ]; then echo -e "File deleted\t\t1ドル"; else echo -e "ERROR file NOT deleted\t1ドル"; fi
}
################
# Main program #
################
echo `date`
echo Start Smart Backup Management for $BACKUP_DIRECTORY
# for all files in the backup directory
for backup_file_name in "$BACKUP_DIRECTORY"* ; do
 # extract file name without last extension
 backup_file_name_noext=`basename ${backup_file_name%.*}`
 # extract date (string) from file name (delete all letters and punctuations)
 backup_file_date_string=`echo "$backup_file_name_noext" | tr -d [:alpha:],[:punct:]`
 # convert string into dclearate (not used)
 #backup_file_date_date=`date -d $backup_file_date_string`
 # get backup date details
 backup_file_day=`date -d $backup_file_date_string +%d`
 backup_file_week=`date -d $backup_file_date_string +%W`
 backup_file_month=`date -d $backup_file_date_string +%m`
 backup_file_year=`date -d $backup_file_date_string +%Y`
 # delete initial 0 if present
 backup_file_day=`echo "$backup_file_day" | sed 's/^0*//'`
 backup_file_week=`echo "$backup_file_week" | sed 's/^0*//'`
 backup_file_month=`echo "$backup_file_month" | sed 's/^0*//'`
 if [ $CURRENT_YEAR -eq $backup_file_year ] ; then
 # same year
 if [ $CURRENT_MONTH -eq $backup_file_month ] ; then
 # same month
 if [ $CURRENT_WEEK -eq $backup_file_week ] ; then
 # same week
 #echo Keep this week backups
 keep_backup_file "$backup_file_name"
 else
 # same month, different weeks
 backup_file_day_of_week=`date -d $backup_file_date_string +%w`
 different_weeks "$backup_file_name" $backup_file_day_of_week
 fi
 else
 # same year, different months
 if [ $CURRENT_WEEK -eq $backup_file_week ] ; then
 # different months BUT same week!!!
 #echo Keep this week backups
 keep_backup_file "$backup_file_name"
 else
 # different months, different weeks
 different_months "$backup_file_name" $backup_file_day $backup_file_month
 fi
 fi
 else
 # different years
 different_years
 fi
done
echo Smart Backup Management finished for $BACKUP_DIRECTORY
echo `date`
echo "* * * * * * * * * *"
exit 0