verifique esta solução do github. seu script bash. Eu não tentei testar esta solução.
#!/bin/bash
################################################
# bash script #
# author Mikolaj 'Metatron' Niedbala #
# displays user crontab in human readable form #
# based on 'crontab' command #
# need to specify user #
# licenced GNU/ GPL #
################################################
if [[ -z $1 ]]; then
echo "Podaj uzytkownika CRON, dla ktorego wyswietlic tabele"
exit 1;
fi;
echo -e "Lista komend do wykonania dla uzytkownika $1\n"
crontab -l -u $1 | while read line
do
if [[ ! $line =~ ^\# && ! -z $line ]]; then
COMBINED_DATE=0
TIME_str=""
DATE_str=""
#explode to values
COMMAND='echo "$line" | sed 's/^\(.\{1,8\} \)\{5\}//''
MINUTES='echo "$line" |cut -d" " -f1'
HOUR='echo "$line" |cut -d" " -f2'
MONTH_DAY='echo "$line" |cut -d" " -f3'
MONTH='echo "$line" |cut -d" " -f4'
WEEK_DAY='echo "$line" |cut -d" " -f5'
#command string
ECHO_str="komenda $COMMAND zostanie wykonana"
#process values
#hours
if [[ ! $HOUR =~ ^\*$ && ! -z $HOUR ]]; then
if [[ $HOUR =~ ^\*\/[0-9]{1,2}$ && ! -z $HOUR ]]; then
NUM_HOUR='echo "$HOUR" |cut -d"/" -f2';
HR_str="co $NUM_HOUR godzin";
elif [[ $HOUR =~ ^[0-9]{1,2}$ && ! -z $HOUR ]]; then
HR_str="o godzinie $HOUR"
COMBINED_DATE=1
elif [[ $HOUR =~ ^[0-9]{1,2}-[0-9]{1,2}$ && ! -z $HOUR ]]; then
FR_NUM_HOUR='echo "$HOUR" |cut -d"-" -f1';
TO_NUM_HOUR='echo "$HOUR" |cut -d"-" -f2';
HR_str="pomiedzy godzina $FR_NUM_HOUR a $TO_NUM_HOUR"
elif [[ $HOUR =~ ^[0-9]{1,2}-[0-9]{1,2}\/[0-9]{1,2}$ && ! -z $HOUR ]]; then
NUM_HOUR='echo "$HOUR" |cut -d"/" -f2';
HOUR_RANGE='echo "$HOUR" |cut -d"/" -f1';
FR_NUM_HOUR='echo "$HOUR_RANGE" |cut -d"-" -f1';
TO_NUM_HOUR='echo "$HOUR_RANGE" |cut -d"-" -f2';
HR_str="pomiedzy godzina $FR_NUM_HOUR a $TO_NUM_HOUR, co $NUM_HOUR godziny"
fi;
else
HR_str=""
fi;
#minutes
if [[ ! $MINUTES =~ ^\*$ && ! -z $MINUTES ]]; then
if [[ $MINUTES =~ ^\*\/[0-9]{1,2}$ && ! -z $MINUTES ]]; then
NUM_MINUTES='echo "$MINUTES" |cut -d"/" -f2'
MIN_str="co $NUM_MINUTES minut"
elif [[ $COMBINED_DATE == 1 ]]; then
if [[ ! $MINUTES =~ ^\*$ && ! -z $MINUTES ]]; then
MIN_str="$MINUTES"
else
MIN_str="w $MINUTES minucie"
fi;
elif [[ $MINUTES =~ ^[0-9]{1,2}-[0-9]{1,2}$ && ! -z $MINUTES ]]; then
FR_NUM_MINUTES='echo "$MINUTES" |cut -d"-" -f1';
TO_NUM_MINUTES='echo "$MINUTES" |cut -d"-" -f2';
MIN_str="pomiedzy $FR_NUM_MINUTES a $TO_NUM_MINUTES minuta"
elif [[ $MINUTES =~ ^[0-9]{1,2}-[0-9]{1,2}\/[0-9]{1,2}$ && ! -z $MINUTES ]]; then
NUM_MINUTES='echo "$MINUTES" |cut -d"/" -f2';
MINUTES_RANGE='echo "$MINUTES" |cut -d"/" -f1';
FR_NUM_MINUTES='echo "$MINUTES_RANGE" |cut -d"-" -f1';
TO_NUM_MINUTES='echo "$MINUTES_RANGE" |cut -d"-" -f2';
MIN_str="pomiedzy $FR_NUM_MINUTES a $TO_NUM_MINUTES minuta, co $NUM_MINUTES minuty"
fi;
else
MIN_str=""
fi;
#day of month
if [[ ! $MONTH_DAY =~ ^\*$ && ! -z $MONTH_DAY ]]; then
if [[ $MONTH_DAY =~ ^\*\/[0-9]{1,2}$ && ! -z $MONTH_DAY ]]; then
NUM_MONTH_DAY='echo "$MONTH_DAY" |cut -d"/" -f2'
MON_D_str="co $NUM_MONTH_DAY dni"
elif [[ $MONTH_DAY =~ ^[0-9]{1,2}$ && ! -z $MONTH_DAY ]]; then
MON_D_str="$MONTH_DAY dnia miesiaca"
elif [[ $MONTH_DAY =~ ^[0-9]{1,2}-[0-9]{1,2}$ && ! -z $MONTH_DAY ]]; then
FR_NUM_MONTH_DAY='echo "$MONTH_DAY" |cut -d"-" -f1';
TO_NUM_MONTH_DAY='echo "$MONTH_DAY" |cut -d"-" -f2';
MON_D_str="pomiedzy $FR_NUM_MONTH_DAY a $TO_NUM_MONTH_DAY dniem miesiaca"
elif [[ $MONTH_DAY =~ ^[0-9]{1,2}-[0-9]{1,2}\/[0-9]{1,2}$ && ! -z $MONTH_DAY ]]; then
NUM_MONTH_DAY='echo "$MONTH_DAY" |cut -d"/" -f2';
MONTH_DAY_RANGE='echo "$MONTH_DAY" |cut -d"/" -f1';
FR_NUM_MONTH_DAY='echo "$MONTH_DAY_RANGE" |cut -d"-" -f1';
TO_NUM_MONTH_DAY='echo "$MONTH_DAY_RANGE" |cut -d"-" -f2';
MON_D_str="pomiedzy $FR_NUM_MONTH_DAY a $TO_NUM_MONTH_DAY dniem miesiaca, co $NUM_MONTH_DAY dni"
fi;
else
MON_D_str=""
fi;
#month
if [[ ! $MONTH =~ ^\*$ && ! -z $MONTH ]]; then
if [[ $MONTH =~ ^\*\/[0-9]{1,2}$ && ! -z $MONTH ]]; then
NUM_MONTH='echo "$MONTH" |cut -d"/" -f2'
MON_str="co $NUM_MONTH miesiecy"
elif [[ $MONTH =~ ^[0-9]{1,2}$ && ! -z $MONTH ]]; then
MON_str="w $MONTH miesiacu"
elif [[ $MONTH =~ ^[0-9]{1,2}-[0-9]{1,2}$ && ! -z $MONTH ]]; then
FR_NUM_MONTH='echo "$MONTH" |cut -d"-" -f1';
TO_NUM_MONTH='echo "$MONTH" |cut -d"-" -f2';
MON_str="pomiedzy $FR_NUM_MONTH a $TO_NUM_MONTH miesiacem"
elif [[ $MONTH =~ ^[0-9]{1,2}-[0-9]{1,2}\/[0-9]{1,2}$ && ! -z $MONTH ]]; then
NUM_MONTH='echo "$MONTH" |cut -d"/" -f2';
MONTH_RANGE='echo "$MONTH" |cut -d"/" -f1';
FR_NUM_MONTH='echo "$MONTH_RANGE" |cut -d"-" -f1';
TO_NUM_MONTH='echo "$MONTH_RANGE" |cut -d"-" -f2';
MON_str="pomiedzy $FR_NUM_MONTH a $TO_NUM_MONTH miesiacem, co $NUM_MONTH miesiecy"
fi;
else
MON_str=""
fi;
#week day
if [[ ! $WEEK_DAY =~ ^\*$ && ! -z $WEEK_DAY ]]; then
if [[ $WEEK_DAY =~ ^\*\/[0-9]{1,2}$ && ! -z $WEEK_DAY ]]; then
NUM_WEEK='echo "$WEEK_DAY" |cut -d"/" -f2'
WEK_str="co $NUM_WEEK dni tygodnia"
elif [[ $WEEK_DAY =~ ^[0-9]{1,2}$ && ! -z $WEEK_DAY ]]; then
WEK_str="$WEEK_DAY dnia tygodnia"
elif [[ $WEEK_DAY =~ ^[0-9]{1,2}-[0-9]{1,2}$ && ! -z $WEEK_DAY ]]; then
FR_NUM_WEEK_DAY='echo "$WEEK_DAY" |cut -d"-" -f1';
TO_NUM_WEEK_DAY='echo "$WEEK_DAY" |cut -d"-" -f2';
WEK_str="pomiedzy $FR_NUM_WEEK_DAY a $TO_NUM_WEEK_DAY dniem tygodnia"
elif [[ $WEEK_DAY =~ ^[0-9]{1,2}-[0-9]{1,2}\/[0-9]{1,2}$ && ! -z $WEEK_DAY ]]; then
NUM_WEEK_DAY='echo "$WEEK_DAY" |cut -d"/" -f2';
WEEK_DAY_RANGE='echo "$WEEK_DAY" |cut -d"/" -f1';
FR_NUM_WEEK_DAY='echo "$WEEK_DAY_RANGE" |cut -d"-" -f1';
TO_NUM_WEEK_DAY='echo "$WEEK_DAY_RANGE" |cut -d"-" -f2';
MON_str="pomiedzy $FR_NUM_WEEK_DAY a $TO_NUM_WEEK_DAY dniem tygodnia, co $NUM_WEEK_DAY dni"
fi;
else
WEK_str=""
fi;
#generate string for end user
if [[ $COMBINED_DATE == 1 ]]; then
if [[ $MIN_str =~ ^[0-9]{1}$ ]]; then
MIN_str="0$MIN_str"
fi;
TIME_str="$HR_str:$MIN_str, "
else
if [[ ! -z $HR_str ]]; then
TIME_str="$HR_str, "
else
TIME_str="$TIME_str$MIN_str, "
fi;
fi;
if [[ ! -z $WEK_str || ! -z $MON_str || ! -z $MON_D_str ]]; then
if [[ ! -z $WEK_str ]]; then
DATE_str="$WEK_str, "
fi;
if [[ ! -z $MON_str ]]; then
DATE_str="$DATE_str$MON_str, "
fi;
if [[ ! -z $MON_D_str ]]; then
DATE_str="$DATE_str$MON_D_str, "
fi;
else
DATE_str="codziennie"
fi;
if [[ $DATE_str =~ ^codziennie$ ]]; then
echo "-+ $ECHO_str $DATE_str $TIME_str" | sed 's/.\{2\}$//'
else
echo "-+ $ECHO_str $TIME_str $DATE_str" | sed 's/.\{2\}$//'
fi;
echo "--"
fi;
done;
exit 0;