bash – shell_exec无法在php web appl中运行

该脚本具有执行权限.通常,脚本会将网络接口列表(eth0 eth1 wlan0)保存在名为“resultat”的文件中,但是当我使用php的shell_exec命令从网页运行此脚本时(echo-password for www-data user’| / usr) / lib / cgi-bin / sudo -S global.sh bin / bash /“)没有生成输出.

如果我在终端中运行与用户www-data相同的脚本,则会正确填充结果文件.

剧本：

#!/bin/bash
  #####   paramères relatives au connexion à la base de données
  HOST_BDD="localhost"
  LOGIN="root"
  PASSWD="password"
  NOM_BDD="dbnessus"
  ##### ces requettes pour vider les tables avant de faire la detection
  vider2="TRUNCATE machine_connecte"
  echo $vider2 | /usr/bin/mysql -h $HOST_BDD 
  -u $LOGIN -p$PASSWD -s $NOM_BDD

  vider1="TRUNCATE interfaces"
  echo $vider1 | /usr/bin/mysql -h $HOST_BDD 
  -u $LOGIN -p$PASSWD -s $NOM_BDD

  initialise="ALTER TABLE machine_connecte AUTO_INCREMENT=0"
  echo $initialise | /usr/bin/mysql -h $HOST_BDD 
  -u $LOGIN -p$PASSWD -s $NOM_BDD
  #######################################################

  /usr/lib/cgi-bin/get_interface.sh > /usr/lib/cgi-bin/liste_interfaces
  while read line; 
  do 

  ip=$(/usr/lib/cgi-bin/get_ip.sh $line)
  mask=$(/usr/lib/cgi-bin/get_netmask.sh $line)
  bcast=$(/usr/lib/cgi-bin/get_bcast.sh $line)


  ###fonction is_alive_ping
  is_alive_ping()
  {
    ping -i 100 -c 1 $1 > /dev/null 2> /dev/null
   [ $? -eq 0 ] && echo  $i >>/usr/lib/cgi-bin/resultat
  }
  cat /dev/null >/usr/lib/cgi-bin/resultat;
  #########


  ###division des octet d'adresse de broadcst
  if [ "$ip" != "" ]
  then
  i1="$(echo $bcast |cut -d"." -f1)"
  i2="$(echo $bcast |cut -d"." -f2)"
  i3="$(echo $bcast |cut -d"." -f3)"
  i4="$(echo $bcast |cut -d"." -f4)"
  fi
  ###  { HostID / NetworkID } / classe du réseau

  ##################### A.255.255.255 Classe A
  if [ "$i2" == "255" ]
  then
for i in "$i1".{1..254}.{1..254}.{1..254}
do
is_alive_ping $i & disown
done
  fi
  ##################### A.B.255.255 Classe B
  if [ "$i2" != "255" ] && [ "$i3" == "255" ]
  then
for i in "$i1.$i2".{1..254}.{1..254} 
do
is_alive_ping $i & disown
done
  fi
  ##################### A.B.C.255 Classe C
  if [ "$i2" != "255" ] && [ "$i3" != "255" ]&& [ "$i4" == "255" ]
  then
for i in "$i1.$i2.$i3".{1..254} 
do
is_alive_ping $i & disown
    done
  fi
  ################
while read ip_up; 
do 
hostname=$(/usr/bin/resolveip -s $ip_up 2>/dev/null)
if [ "$hostname" == "" ]
then
hostname="*"
fi
mac=$(/usr/sbin/arp -a $ip_up |cut -d" " -f4)
if [ "$ip_up" == "$ip" ] 
then
mac=$(/sbin/ifconfig $line |grep 'HWaddr'|grep -v '127.0.0.1'|awk '{ print $5}')
fi
OS=$( /usr/bin/nmap -A $ip_up |grep "Service Info:" |awk '{print $4,$5}' )
if [ "$OS" == "Unix,Linux" ] || [ "$OS" == "Linux" ]
then
OS="Linux"
elif [ "$OS" == "Windows " ]
then 
OS="Windows"
else
OS="*"
fi
 #sql1="INSERT INTO  dbnessus.interfaces (nom_interface)VALUES ('$line');"
 sql1="INSERT IGNORE INTO  dbnessus.interfaces (nom_interface)VALUES ('$line');"
 sql2="INSERT INTO  dbnessus.machine_connecte (idmachine,ip_mach,mask_mach,nom_mach,mac_mach,os_mach,interfaces_nom_interface)VALUES ( NULL,'$ip_up','$mask','$hostname','$mac','$OS','$line');"


 echo $sql1 | /usr/bin/mysql -h $HOST_BDD -u $LOGIN -p$PASSWD -s $NOM_BDD
 echo $sql2 | /usr/bin/mysql -h $HOST_BDD -u $LOGIN -p$PASSWD -s $NOM_BDD




    done < /usr/lib/cgi-bin/resultat
  ip=""
  done < /usr/lib/cgi-bin/liste_interfaces
  echo "cbon"