[root@localhost ~]# vim a
#!/bin/bash
# Name:abc
# Description:Create script
# Author:mylinux
# Version:0.0.1
# Datatime:03/02/12 14:42:00
# Usage:mkscript FILENAME
cat >$1 <<EOF
#!/bin/bash
# Name: `basename $1`
# Description:
# Author: mylinux
# Version: 0.0.1
# Datatime: `date +'%F %T'`
# Usage: `basename $1`
EOF
vim +8 $1
---------------------
[root@localhost ~]# bash a test1.sh 運行此腳本自動生成
#!/bin/bash
# Name: test1.sh
# Description:
# Author: mylinux
# Version: 0.0.1
# Datatime: 2016-09-17 18:16:45
# Usage: test1.sh
-----------------------------------~
再判斷如果有內容就直接打開 沒內容才寫入
[root@localhost ~]# vim a
#!/bin/bash
# Name:abc
# Description:Create script
# Author:mylinux
# Version:0.0.1
# Datatime:03/02/12 14:42:00
# Usage:mkscript FILENAME
if grep "[^[:space:]]" $1 &>/dev/null;then #grep非空白行
vim + $1 +表示打開最後一行
else
cat >$1 <<EOF
#!/bin/bash
# Name: `basename $1`
# Description:
# Author: mylinux
# Version: 0.0.1
# Datatime: `date +'%F %T'`
# Usage: `basename $1`
EOF
vim +8 $1
fi
---------------------------------------
保存退出後自動檢查語法。
#!/bin/bash
# Name:abc
# Description:Create script
# Author:mylinux
# Version:0.0.1
# Datatime:03/02/12 14:42:00
# Usage:mkscript FILENAME
if grep "[^[:space:]]" $1 &>/dev/null;then
vim + $1
else
cat >$1 <<EOF
#!/bin/bash
# Name: `basename $1`
# Description:
# Author: mylinux
# Version: 0.0.1
# Datatime: `date +'%F %T'`
# Usage: `basename $1`
EOF
vim +8 $1
fi
until bash -n $1 &>/dev/null ;do
read -p "Syntax,error,q|Q for quiting, others for editing: " OPT
case $OPT in
q|Q)
echo "quit."
exit 1
;;
*)
vim + $1
;;
esac
done
chmod +x $1
----------------------------------------------
getopts：讓腳本可以獲取選項
[root@localhost ~]# bash a opttest.sh
#!/bin/bash
# Name: opttest.sh
# Description:
# Author: mylinux
# Version: 0.0.1
# Datatime: 2016-09-13 01:57:50
# Usage: opttest.sh
getopts "bd" OPT
echo $OPT
[root@localhost ~]# bash opttest.sh -b
b
[root@localhost ~]# bash opttest.sh -d
d
getopts 默認情況下只能獲取一個選項
OPTARG:表示某一個變量的參數，需要帶參數的選項後面必須帶:
例如getopts "bd:" OPT
getopts "b:d:" OPT
#!/bin/bash
# Name: opttest.sh
# Description:
# Author: mylinux
# Version: 0.0.1
# Datatime: 2016-09-13 01:57:50
# Usage: opttest.sh
getopts "bd:" OPT
echo $OPT
echo $OPTARG
[root@localhost ~]# bash opttest.sh -d "haha"
d
haha
--------------------------------
在所有選項最前面輸入:表示不顯示錯誤信息
#!/bin/bash
getopts ":b:d:" OPT
echo $OPT
echo $OPTARG
[root@localhost ~]# bash opttest.sh -c
a b
c
-----------------------------
讓一個腳本獲取多個參數
#!/bin/bash
# Name: opttest.sh
# Description:
# Author: mylinux
# Version: 0.0.1
# Datatime: 2016-09-13 01:57:50
# Usage: opttest.sh
function USAGE {
echo "Usage: opttest.sh [-d argu] [-b argu]"
}
while getopts ":b:d:" RT;do
case $RT in
b) echo "The options is b."
echo $OPTARG
;;
d) echo "The options is d."
echo $OPTARG
;;
*) USAGE
;;
esac
done
-----------------------------------------------------------
[root@localhost ~]# bash a -d "hello" /tmp/a
OPTIND:選項索引，這裏表示 -d ， "hello" ， /tmp/a這三個位置變量
-1代表不包含/tmp/a
shift $[$OPTIND-1]
最終完善版：
寫一個腳本：用於創建腳本，並cat註釋信息，並檢查語法錯誤。如果語法錯誤則。提示用戶是否打開修改
[root@localhost ~]#vim a
#!/bin/bash
# Name:abc
# Description:Create script
# Author:mylinux
# Version:0.0.1
# Datatime:03/02/12 14:42:00
# Usage:mkscript FILENAME
while getopts ":d:" OPTA;do
case $OPTA in
d)
DESC=$OPTARG
shift $[$OPTIND-1];;
*)
echo "Usage:mkscript [-d DESCRIPTION] FILENAME"
shift $[$OPTIND-1];;
esac
done
if ! grep "[^[:space:]]" $1 &>/dev/null;then
cat > $1 <<EOF
#!/bin/bash
# Name: `basename $1`
# Description: $DESC
# Author: mylinux
# Version: 0.0.1
# Datatime: `date +'%F %T'`
# Usage: `basename $1`
EOF
fi
vim + $1
until bash -n $1 &>/dev/null ;do
read -p "Syntax,error,q|Q for quiting, others for editing: " OPT
case $OPT in
q|Q)
echo "quit."
exit 1 ;;
*)
vim + $1;;
esac
done
chmod +x $1
-----------------------------------------------------------------------
getopts:
OPTARG
OPTIND
----------------------------------------
寫一個腳本getinterface.sh，腳本可以接受選項(i,I,a)完成以下任務：
1.使用以下形式:getinterface.sh [-i interface|I IP|-a]
2.當用戶使用-i選項時，顯示其指定網卡的IP地址；
3.當用戶使用-I選項時，顯示其後面的IP地址所屬的網絡接口
#4.當用戶單獨使用-a選項時，顯示所有網絡接口及其IP地址(lo除外)
#!/bin/bash
# Name: getinterface.sh
# Description: Get ethernet information
# Author: mylinux
# Version: 0.0.1
# Datatime: 2016-09-13 07:34:56
# Usage: getinterface.sh
function SHOWIP {
if ! ifconfig|grep -o "^[^[:space:]]\{1,\}"|grep $1 &>/dev/null;then
return 13
fi
echo -n "${1}: "
ifconfig $1 |grep -o "inet addr:[0-9\.]\{1,\}" |cut -d: -f 2 # \{1,\}表示引用前面至少1次
echo
}
SHOWETHER () {
if ! ifconfig |grep -o "inet addr:[0-9\.]\{1,\}" |cut -d: -f 2|grep $1 &>/dev/null ;then
return 14
fi
echo -n "${1}: "
ifconfig |grep -B 1 "$1" |grep -o "^[^[:space:]]\{1,\}" #grep -B顯示grep到的結果和結果的上一行
echo
}
USAGE() {
echo "getinterface.sh <-i interface|-I IP>"
}
while getopts ":i:I:" SWICH; do
case $SWICH in
i)
SHOWIP $OPTARG
[ $? -eq 13 ] && echo "Wrong ehtercard"
;;
I)
SHOWETHER $OPTARG
[ $? -eq 14 ] && echo "Wrong IP."
;;
*)
USAGE
;;
esac
done
----------------------------------