shell 基本使用

统计指定后缀名文件行数 

#!/bin/bash

ret=0
function cal_line()
{
    if [ -f "$1" ]
    then
         name=$1
         tmpname=${name##*.}
         if [ "$tmpname" == "c" ] || [ "$tmpname" == "h" ]
         then
             local va=`grep -v "^$" $1 |  wc -l | awk '{print $1}'`
             ret=$va
             return
         fi
    fi
    for i in `ls $1`
    do
       if [ -d "$1/$i" ]
       then
          cal_line "$1/$i"
       else
         name="$1/$i"
         tmpname=${name##*.}
         if [ "$tmpname" == "cpp" ] || [ "$tmpname" == "h" ]
         then
             local va=`grep -v "^$" $1/$i | wc -l | awk '{print $1}'`
             let ret=$ret+$va
         fi
       fi
    done
}
cal_line $1
echo $ret

##在地址范围内寻找一个可以使用的ip地址
#!/bin/bash
for (( i=1; i < 255; i++ ))
do
    ip="192.168.11.$i"
    ping -w 1 $ip >& /dev/null
    if (( $? ))
    then
       echo "" 
       echo "can use ip is "$ip
       exit 0
    else
       echo -n "."
    fi
done

#!/bin/bash

#数组的基本使用
tmparr=(1 2 3 "das")
len=${#tmparr[@]}
len=`expr $len - 1`
echo $len
echo ${tmparr[0]}
echo ${tmparr[$len]}

#将字符串转换为数组
tmpstr="1,2,3,4,5,6,7,8"

#${string//substring/repalcestring}
#上面的含义是将string中的子串substring全部换为replacestring字符串
tmparr=(${tmpstr//,/  }) #将,全部换为空格 然后用()转换为数组
echo ${#tmparr[@]}
echo ${tmparr[@]}

查看dbus服务和 对象
#!/bin/bash


if [[ $# < 1 ]]
then
   echo "Usage show.list [dbus | servname[objname]]"
   exit 0
fi


#列出虽有的活动服务
if [ "$1" = "dbus" ]
then
 echo "***********************active service*************"
 echo ""
    dbus-send --system --print-reply --dest=org.freedesktop.DBus / org.freedesktop.DBus.ListActivatableNames | grep "string" | awk '{print $2}' | awk -F \" '{print $2}'
 echo ""
 echo "**************************************************"
 exit 0
fi


if [ $# -eq 1 ]
then
    dbus-send --system --type=method_call --print-reply --dest=$1 / org.freedesktop.DBus.Introspectable.Introspect
else
    dbus-send --system --type=method_call --print-reply --dest=$1 /$2 org.freedesktop.DBus.Introspectable.Introspect
fi