外壳脚本中意外的文件结束错误

Question

嗨，我是学习脚本的新手，当我尝试运行以下脚本时，我收到以下错误：

./snortscript.sh: line 168: unexpected EOF while looking for matching `"'
./snortscript.sh: line 173: syntax error: unexpected end of file

当我尝试运行脚本以在 CentOS 7 中运行 SNOT 服务时，就会发生这种情况

---

这是脚本

错误发生在第 168 行和第 172 行

#!/bin/bash
#
# snort  Start up the SNORT Intrusion Detection System daemon
#
# chkconfig: 2345 55 25
# description: SNORT is a Open Source Intrusion Detection System
#This service starts up the snort daemon.
#
# processname: snort
# pidfile: /var/run/snort_eth0.pid
### BEGIN INIT INFO
# Provides: snort
# Required-Start: $local_fs $network $syslog
# Required-Stop: $local_fs $syslog
# Should-Start: $syslog
# Should-Stop: $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start up the SNORT Intrusion Detection System daemon
# Description:
#SNORT is an application for Open Source Intrusion Detection.
#
#This service starts up the Snort IDS daemon.
### END INIT INFO
# source function library
. /etc/rc.d/init.d/functions
# pull in sysconfig settings
[ -f /etc/sysconfig/snort ] && . /etc/sysconfig/snort
RETVAL=0
prog="snort"
lockfile=/var/lock/subsys/$prog
# Some functions to make the below more readable
SNORTD=/usr/local/bin/snort
#OPTIONS="-A fast -b -d -D -i eth0 -u snort -g snort -c /etc/snort/snort.conf -l
/var/log/snort"
#PID_FILE=/var/run/snort_eth0.pid
# Convert the /etc/sysconfig/snort settings to something snort can
# use on the startup line.if [ "$ALERTMODE"X = "X" ]; then
ALERTMODE=""
else
ALERTMODE="-A $ALERTMODE"
fi
if [ "$USER"X = "X" ]; then
USER="snort"
fi
if [ "$GROUP"X = "X" ]; then
GROUP="snort"
fi
if [ "$BINARY_LOG"X = "1X" ]; then
BINARY_LOG="-b"
else
BINARY_LOG=""
fi
if [ "$LINK_LAYER"X = "1X" ]; then
LINK_LAYER="-e"
else
LINK_LAYER=""
fi
if [ "$CONF"X = "X" ]; then
CONF="-c /etc/snort/snort.conf"
else
CONF="-c $CONF"
fi
if [ "$INTERFACE"X = "X" ]; then
INTERFACE="-i eth0"
PID_FILE="/var/run/snort_eth0.pid"
else
PID_FILE="/var/run/snort_$INTERFACE.pid"
INTERFACE="-i $INTERFACE"
fi
if [ "$DUMP_APP"X = "1X" ]; then
DUMP_APP="-d"
else
DUMP_APP=""
fiif [ "$NO_PACKET_LOG"X = "1X" ]; then
NO_PACKET_LOG="-N"
else
NO_PACKET_LOG=""
fi
if [ "$PRINT_INTERFACE"X = "1X" ]; then
PRINT_INTERFACE="-I"
else
PRINT_INTERFACE=""
fi
if [ "$PASS_FIRST"X = "1X" ]; then
PASS_FIRST="-o"
else
PASS_FIRST=""
fi
if [ "$LOGDIR"X = "X" ]; then
LOGDIR=/var/log/snort
fi
# These are used by the 'stats' option
if [ "$SYSLOG"X = "X" ]; then
SYSLOG=/var/log/messages
fi
if [ "$SECS"X = "X" ]; then
SECS=5
fi
if [ ! "$BPFFILE"X = "X" ]; then
BPFFILE="-F $BPFFILE"
fi
runlevel=$(set -- $(runlevel); eval "echo $$#" )
start()
{
[ -x $SNORTD ] || exit 5
echo -n $"Starting $prog: "
daemon --pidfile=$PID_FILE $SNORTD $ALERTMODE $BINARY_LOG
$LINK_LAYER $NO_PACKET_LOG $DUMP_APP -D $PRINT_INTERFACE$INTERFACE -u $USER -g $GROUP $CONF -l $LOGDIR $PASS_FIRST $BPFFILE
$BPF && success || failure
RETVAL=$?
[ $RETVAL -eq 0 ] && touch $lockfile
echo
return $RETVAL
}
stop()
{
echo -n $"Stopping $prog: "
killproc $SNORTD
if [ -e $PID_FILE ]; then
chown -R $USER:$GROUP $PID_FILE &&
rm -f $PID_FILE
fi
RETVAL=$?
# if we are in halt or reboot runlevel kill all running sessions
# so the TCP connections are closed cleanly
if [ "x$runlevel" = x0 -o "x$runlevel" = x6 ] ; then
trap '' TERM
killall $prog 2>/dev/null
trap TERM
fi
[ $RETVAL -eq 0 ] && rm -f $lockfile
echo
return $RETVAL
}
restart() {
stop
start
}
rh_status() {
status -p $PID_FILE $SNORTD
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
case "$1" in
start)
rh_status_q && exit 0start
;;
stop)
if ! rh_status_q; then
rm -f $lockfile
exit 0
fi
stop
;;
restart)
restart
;;
status)
       rh_status
       RETVAL=$?
       if [ $RETVAL -eq 3 -a -f $lockfile ] ; then
       RETVAL=2
       fi
;;
*)
echo $"Usage: $0{start|stop|restart|status}"
RETVAL=2
esac    
exit $RETVAL

Answer 1

在脚本中，请参阅line 34 and 35

#OPTIONS="-A fast -b -d -D -i eth0 -u snort -g snort -c /etc/snort/snort.conf -l
/var/log/snort"

注释从第 34 行开始，但在第 35 行有一个换行符。所以你应该把它写成：

#OPTIONS="-A fast -b -d -D -i eth0 -u snort -g snort -c /etc/snort/snort.conf -l /var/log/snort"

在一行中。这应该可以解决您遇到的错误。请注意，在您提出的问题中，语法突出显示是如何混乱的。这也很清楚。

脚本中还有两个错误。一个是在 line 38 中，您必须在if开始之前断开一个新行，在 ... startup line.if [ "$ALERTMODE"X = "X" ];... ，更正的代码应该是：

# use on the startup line
if [ "$ALERTMODE"X = "X" ]; then
ALERTMODE=""
...

另一个是在 line 75 ，我们有 fiif [ "$NO_PACKET_LOG"X = "1X" ]; then ，应该是：

fi
if [ "$NO_PACKET_LOG"X = "1X" ]; then

再次换行。似乎脚本没有从源正确复制，因此格式混乱。

Answer 2

错误是第 168 行中的错误用法提示。将其更正为：

echo "Usage: $0 {start|stop|restart|status}"