的Cron無法運行bash腳本

Question

我bash腳本

#!/bin/sh 

DTFILE=/etc/daytime.addr 
DTPORT=13 
DAYTIME_ERROR=/tmp/dtm.err 

function daytime_error(){ 
    if [[ -z $1 ]] 
    then 
    exit 1 
    fi 
    if [[ -e $DAYTIME_ERROR ]] 
    then 
    echo "Error already reported" 
    else 
    logger "$1" 
    touch $DAYTIME_ERROR 
    fi 
    exit 1 
} 

if [[ -s $DTFILE ]] 
then 
    ADDR=$(head -n1 $DTFILE) 
    DAYTIME=$(telnet $ADDR $DTPORT | time_conv.awk) 
    if [[ -z $DAYTIME ]] 
    then 
    daytime_error "Daytime client: no connection to $ADDR" 
    else 
    date -s "$DAYTIME" 
    hwclock -w 
    rm $DAYTIME_ERROR 
    fi 

else 
    daytime_error "Daytime client: no daytime server address in file $DTFILE" 
fi 

和它的作品從命令行調用時，但當cron的調用失敗。具體來說，使用telnet命令的行提供零字節的輸出。 Telnet有755個掩碼，所以每個用戶都應該可以使用它。有任何想法嗎 ？

更新time_conv.awk的，內容：

#! /usr/bin/awk -f 

/[0-9]+:[0-9]+:[0-9]+/ { 
    if ($2~/Jan/) $2=1; 
    else if ($2~/Feb/) $2=2; 
    else if ($2~/Mar/) $2=3; 
    else if ($2~/Apr/) $2=4; 
    else if ($2~/May/) $2=5; 
    else if ($2~/Jun/) $2=6; 
    else if ($2~/Jul/) $2=7; 
    else if ($2~/Aug/) $2=8; 
    else if ($2~/Sep/) $2=9; 
    else if ($2~/Oct/) $2=10; 
    else if ($2~/Nov/) $2=11; 
    else if ($2~/Dec/) $2=12; 
    print $5 "-" $2 "-" $3 " " $4 
} 

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