Exemples

#!/bin/bash
echo "--------------------------"
echo "--- Test duration (2s) ---"
echo "--------------------------"
TIME_START=`echo "$(date +%T)"`
TIME_START_1970=$(echo "$(date +%s)")
sleep 2
TIME_END=$(echo "$(date +%T)")
TIME_END_1970=`echo "$(date +%s)"`
echo "---- Start: $TIME_START, End: $TIME_END, duration $(echo $TIME_END_1970 - $TIME_START_1970 | bc -l) ---"

#!/bin/bash
# Usage: bashTrapExemple

# Create process that kills this process after N seconds.
# The current process traps the kill signal and does some clean up.
# The current process can be killed with ^C ou kill PID


function usage {

        # Display usage message on standard error
        echo "Usage: $PROGNAME file" 1>&2
}

function clean_up {

        # Perform program exit housekeeping
        # Optionally accepts an exit status
        echo -e '\n--> clean-up done !!!'
        exit $1
}

function error_exit {

        # Display error message and exit
        echo "${PROGNAME}: ${1:-"Unknown Error"}" 1>&2
        clean_up 1
}

# Cette fonction a pour but de tuer un process au bout de n secondes
function kill_this_within_delay {

        # Display error message and exit
        sleep 8s
        echo -e '\a'
        echo -e "\n >>> Killing $1"
        kill $1
}
# on lance en background un processus qui tue le process courant au bout de 3 secondes
kill_this_within_delay $$ &

# recupération des signaux pour traitement
trap clean_up SIGHUP SIGINT SIGTERM SIGKILL

# begin of treatment
echo "PID du processus courant : $$"
echo "PID du processus lancé : $!"
echo Endless loop started!

while :                 # This is the same as "while true".
do
        sleep 0.1       # This script is not really doing anything.
        echo -n .
done

#!/bin/bash
echo "PID du processus courant : $$"

function dummy_loop {
   # La fonction clean_up permet de reprendre la main après le kill du script
   function clean_up {

      # Perform program exit hxit status
      echo -e '\ndummy_loop --> clean-up done !!!\n'
      exit $1
   }
   trap clean_up SIGHUP SIGINT SIGTERM SIGKILL
   # Looping....
   while :                      # This is the same as "while true".
   do
           sleep 0.05   # This script is not really doing anything.
           echo -n .
   done
   echo -e '\ndummy_loop --> FIN' # Ne sera jamais affiché
}

# On lance une commande en background avec => &
# Ca peut être une commande, un autre script bash, un programme, etc...
dummy_loop &

echo "PID du processus lancé (dummy_loop) : $!"
sleep 3
echo -e "\nKilling $! ..."
kill $!

#!/bin/bash
TIME_START_1970=$(date +%s)
LOG_DIR=/var/log/
BUREAU="HAL"

if [ $(hostname) == "$BUREAU" ]
then
	LOGFILE="${LOG_DIR}$(basename $0).$(date +%Y\-%m\-%d\-%Hh%Mmn%S).log"
	REMOTE_DIR="./www/wiki-2014-11-13/"
   archiveDir="/cygdrive/f/Z----Sauveqardes----Z/SpecialBackup/"  
   archiveName="wiki.roge.info-FULL"  
	TMP_DIR="/tmp/${archiveName}/"
   zipTarget="${archiveDir}${archiveName}-$(date +%Y\-%m\-%d\-%Hh%Mmn%S).zip" 
   
	echo "FULL Web backup: HAL <-- http://roge.info/wiki" | tee -a $LOGFILE
	TIME_START=$(date +%T)
	TIME_START_1970=$(date +%s)

   local_dir=$(pwd)
   rm -Rf $TMP_DIR 
   mkdir $TMP_DIR
   # Mesure de sécurité (à cause des rm)
   cd $TMP_DIR || { 
      echo "*** ERREUR  *** cd $TMP_DIR " | tee -a $LOGFILE
      exit -1 
   }

	# -c, --continue :  continue a mirror job if possible
	# -R, --reverse :  reverse mirror (put files) ==> Upload
	# -e, --delete  :   delete files not present at remote site
	# -n, --only-newer :   download only newer files (-c won't work)

	lftp -c "
		set ftp:list-options -a;
		open ftp://user:pass@ftp.site; 
		cd $REMOTE_DIR;
		lcd $TMP_DIR;
		mirror --continue --parallel=8 --log=$LOGFILE 
		close;
		quit;
	" >> $LOGFILE
   
   # Création de l'archive
   zip -qr "$zipTarget"  * | tee -a $LOGFILE
   echo -e "File created: $zipTarget [$(du -h $zipTarget  | cut -f 1)]"
   cd $local_dir
   rm -Rf $TMP_DIR
	# Nettoyage du dossier des archives   
   cleanArchiveDir.sh -t $archiveDir -p $archiveName -k 7 | tee -a $LOGFILE  
	# Nettoyage des logs
   cleanArchiveDir.sh -t ${LOG_DIR} -p $(basename $0) -s log -k 3 | tee -a $LOGFILE  
   
   TIME_END_1970=$(date +%s)
   echo -e "\n******** $(date +%T) - $(hostname): Fin de $(basename $0) OK! ($(convertDuration.sh $(expr  $TIME_END_1970 - $TIME_START_1970))) **********"  | tee -a $LOGFILE 
	echo -e "\nlog: $LOGFILE"
else
   echo "ERROR: This script runs only on $BUREAU host"
fi

#!/bin/bash

usage() {
   cat <<-'_usage_statement_'

cleanArchiveDir.sh supprime des archives pour ne conserver que les 3 derniers
    
Usage: cleanArchiveDir.sh -t directory -p prefix -s suffix [ -k number]

  -s, --suffix         
        naming suffix for the archives (a prefix and/or a suffix must be specified)
  -p, --prefix         
        naming prefix for the archives (a prefix and/or a suffix must be specified)
  -t, --target       
        directory for the final archive (must exist)
  -k, --keep
        number of archives to be kept 
        
_usage_statement_
}
 
keep_archives=3 # default value

# echo -e "OPTIONS: $# - $@"
while [[ $# > 0 ]]
do
#  echo -e "$# - OPTION: $1 + $2"
   case $1 in
        -t|--target) 
            if [ "$2" ] ; then # $2 exists
               targetDir=$2;
               shift 2
            else 
               shift 
            fi
            ;;
        -p|--prefix ) 
            if [ "$2" ] ; then # $2 exists
               prefix=$2;
               shift 2
            else 
               shift 
            fi
            ;;
        -s|--suffix ) 
            if [ "$2" ] ; then # $2 exists
               suffix=$2;
               shift 2
            else 
               shift 
            fi
            ;;
        -k|--keep) 
            if [ "$2" ] ; then # $2 exists
               keep_archives=$2;
               shift 2
            else 
               shift 
            fi
            ;;
         *) # Unknown option
            echo -e "Error : Unknown option $1\n"
            usage
            exit -1
            ;;
   esac
done

# echo "targetDir=$targetDir"
# echo "prefix=$prefix"
# echo "keep_archives=$keep_archives"

# le dossier cible doit être spécifiée
[ ! "${targetDir}" ] && {
   echo -e "Error -t: a directory must be specified"  
   usage
   exit -1
}

# Le targetDir doit exister
[[ ! -d "$targetDir" ]] && {
   echo -e "\nERREUR -t: the directory $targetDir does not exist!\n"
   usage
   exit -1
}

# le prefix ou le suffix  doit être spécifiée
[ ! "${prefix}" ] && [ ! "${suffix}" ] && {
   echo -e "Error: a prefix and/or a suffix must be specified"  
   usage
   exit -1
}

# keep_archives doit être un entier
[[ $keep_archives = +([0-9]) ]] || {
   echo "ERROR -k: $keep_archives must be an integer!"
   usage
   exit -1
}

nbArchives=$(ls $targetDir/$prefix*$suffix | wc -l) 
# echo "nbArchives=$nbArchives"
[ ! "${nbArchives}" ]  && {
   echo -e "Error: * is forbiden in parameters"  
   usage
   exit -1
}

# echo "keep_archives=$keep_archives"
aSupprimer=$(expr $nbArchives - $keep_archives)
count=0
[ $aSupprimer -lt 1 ] && {
   echo "Il n'y a pas d'archive à supprimer ($nbArchives archive(s))"
   exit 0
}
echo "Nettoyage des ${nbArchives} archives du dossier $targetDir " 

for ar in $targetDir/$prefix*$suffix ; do
   if [ $count -lt $aSupprimer ]
   then
      echo "   - $(basename $ar), $(du -h $ar  | cut -f 1) - deleted"
      rm -f $ar
   else
      echo "   + $(basename $ar), $(du -h $ar  | cut -f 1) - kept"
   fi
   ((count++))
done