【shell脚本欣赏区】:[展示你的作品的好去处!欢迎投帖]

fmying

bash的只能给出整数结果，所以，写了那么一个脚本。

1. 
   
2. #!/bin/bash
   
3. #ZERO=0
   
4. #ONE=1
   
5. LEAST=2
   
6. STAND=3
   
7. if [ "$#" -lt "$LEAST" ]; then
   
8. echo usage: float.sh A B [NF]
   
9. echo "      " calculate A/B with NF digits after point
   
10. echo "      " default is 5 digits
    
11. exit
    
12. else
    
13. A=$1
    
14. B=$2
    
15. fi
    
16. NF=5
    
17. if [ "$#" -ge "$STAND" ]; then
    
18. NF=$3
    
19. fi
    
20. 
    
21. out=""
    
22. 
    
23. for ((i=0;i<=$NF;i++))
    
24. do
    
25. 
    
26. if [ "$i" = '1' ];then
    
27. out="${out}."
    
28. fi
    
29. 
    
30. C=`expr $A / $B`
    
31. A=`expr $A % $B`
    
32. 
    
33. if [ "$A" = '0' ];then
    
34. i=$NF
    
35. fi
    
36. 
    
37. if [[ "$A" != '0' && "$i" -eq "$NF" ]];then
    
38.   if [[ "$A" > '4' ]];then
    
39.     C=`expr $C "+" 1`
    
40.   fi
    
41. fi
    
42. 
    
43. A=`expr $A "*" 10`
    
44. 
    
45. out="${out}${C}"
    
46. done
    
47. 
    
48. echo $out

复制代码

njuptor

好～～学习了，牛人

zhaomf

#!/bin/bash

########################################################################
## Author:zhao mingfeng                                                                                                                      ##
## Date:2009-05-12                                                                                                                              ##
## Copyright(c) 2009, zhaomf  All Rights Reserved       ##
########################################################################

# this shell aimed at 2 points:
# 1.use mysqldump backup mysql database bwisp to /backup/mysql.
# 2.upload /backup/mysql backup files to a delicated ftp address.

# before start this shell you should set privileges use chmod as fllows
# chmod 755ftp.sh

echo
echo "__________________________start_________________________"
################ use mysqldump backup mysql database bwisp ################

echo "$(date +%Y-%m-%d_%H:%M:%S)"
echo "++++++++++start using mysqldump backup mysql database +++++++++"
MyUSER="bwisp2"         #usename
MyPASS="bwisp2"         #password
MyHOST="192.168.168.4"  #hostname of host ip

# Linux bin paths, change this if it can't be autodetected via which command
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
CHOWN="$(which chown)"
CHMOD="$(which chmod)"
TAR="$(which tar)"
GZIP="$(which gzip)"
TOUCH="$(which touch)"
CAT="$(which cat)"

# Backup Dest directory, change this if you have someother location
DEST="/backup"

# Main directory where backup will be stored
MBD="$DEST/mysql"

# Get hostname
HOST="$(hostname)"

# Get data in yyyy-mm-dd format
NOW="$(date +"%Y-%m-%d")"

# File to store current backup file
FILE=""

# Store list of databases
DBS=""

# DO NOT BACKUP these databases
FANFAN="information_schema"

[ ! -d $MBD ] && mkdir -p $MBD || :

# Only root can access it!
$CHOWN 0.0 -R $DEST
$CHMOD 0600 $DEST

# Get all database list first
DBS="$($MYSQL -u $MyUSER -h $MyHOST -p$MyPASS -Bse 'show databases')"
for db in $DBS
do
    skipdb=-1
    if [ "$FANFAN" != "" ];
    then
        for i in $FANFAN
        do
            [ "$db" == "$i" ] && skipdb=1 || :
        done
    fi

    if [ "$skipdb" == "-1" ] ; then
        FILE="$MBD/$db.$HOST.$NOW.gz"
        # do all inone job in pipe,
        # connect to mysql using mysqldump for select mysql database
        # and pipe it out to gzip file in backup dir
        $MYSQLDUMP -u $MyUSER -h $MyHOST -p$MyPASS $db | $GZIP -9 > $FILE
    fi
done
echo "$(date +%Y-%m-%d_%H:%M:%S)"
echo "+++++++++ finished dump mysql databases to $MBD +++++++++"
################## starting upload files to delicated ftp ##################
$TOUCH $MBD/ftp.cmd
FTP_CMD=$MBD/ftp.cmd
FTP=xxx.xxx.xxx.xxx
echo "$(date +%Y-%m-%d_%H:%M:%S)"
echo "+++++++++++++++ start uploading $MBD back files to ftp{FTP} +++++++++++++++++++++"
echo "open ${FTP}" > ${FTP_CMD}
echo "user xx xx" >> ${FTP_CMD}
echo "bin" >> ${FTP_CMD}
echo "hash" >> ${FTP_CMD}
echo "put $FILE /$db.$HOST.$NOW.gz" >> ${FTP_CMD}
echo "close" >> ${FTP_CMD}
echo "bye" >> ${FTP_CMD}
$CAT ${FTP_CMD} | ftp -n
rm ${FTP_CMD}
rm $FILE
echo "$(date +%Y-%m-%d_%H:%M:%S)"
echo "+++++++++++ finished upload files to ftp{FTP} +++++++++++++++"
echo "_______________________________end___________________________"
echo
################################## the end ##################################

Linux色

这个帖子非常好。不过脚本还有待完善，还有很多值得讨论的地方，我刚看第一个，就发现了问题：1、脚本只能修改最后一行，其他行修改之后被原来的覆盖 2、如果文件存在特殊字符（如'/'），脚本报错。希望能有个专门讨论该帖子的脚本的空间……

Linux色

这个帖子非常好。不过脚本还有待完善，还有很多值得讨论的地方，我刚看第一个，就发现了问题：1、脚本只能修改最后一行，其他行修改之后被原来的覆盖 2、如果文件存在特殊字符（如'/'），脚本报错。希望能有个专门讨论该帖子的脚本的空间……

lhhb520520

非常不错！支持下

daxi

#!/bin/sh
#
# replace.sh 批量替换文本文件内容(脚本会自动忽略非文本文件)

# 使用方式：sh replace.sh src_str(原串) desc_str(目的串) src(源文件或原目录) desc（转换后的文件或目录）
# eg: ./replace.sh "\t" "    " ~/python ~/python2 将python目录中文件的制表符替换为四个空格，并将结果导到python2中

if [ $# -ne 4 ]
then
        echo "args error, user 'sh expandtab.sh src_str desc_str src desc'"
        exit
fi

src_str=$1
desc_str=$2
src=$3
desc=$4

# 判断权限
if [ ! -r $src ]; then
        echo "srcsrc unreadable"
        exit
fi


# 转换单文件，expand_file src_file desc_file
function expand_file()
{
        if [ $# -ne 2 ]; then
                echo "expand_file() error"
                exit
        fi

        # 过滤非文本文件
        ret=`file $1|grep text`
        if [ -z "$ret" ]; then
                echo "ignore $1"
                return
        fi

        echo "expand_file $1 $2"
        # 先清空目标文件
        echo -n "" > $2
        # 替换       
        sed "s/$src_str/$desc_str/g" $1 >> $2
}

# 批量转换 expand_dir src_dir desc_dir
function expand_dir()
{
        # 递归截止条件
        if [ ! -d $1 ]; then
                expand_file $1 $2
                return
        fi

        # 目标文件夹不存在就新建
        if [ ! -d $2 ]; then
                mkdir $2
        fi

        echo "expand_dir $1 $2"
       
        for item in `ls $1`
        do
                sdir=$1"/"$item
                # 分文件和文件夹处理
                if [ -d $sdir ]; then
                        expand_dir $sdir $2"/"$item
                else
                        expand_file $sdir $2"/"$item
                fi
        done
}

# 转换
if [ ! -d $src ]; then
        # 单文件
        echo "begin single"
        if [ -d $desc ]; then
                expand_file $src $desc"/"$src
        else
                expand_file $src $desc
        fi
else
        # 批处理
        echo "begin batch"
        if [ $src != $desc ]; then
                if [ ! -d $desc ]; then
                        mkdir $desc
                fi
                expand_dir $src $desc
        else
                echo "error:desc is the same to src!"
                exit
        fi
fi

echo "replace done."

brauceunix

从网上获取时间，获取成功的话，就将值写到Flash中。。如果网络没有时间的话，就直接从Flash读时间
#!/bin/sh

a=0
ping -c 3 59.124.196.84

echo $?
#if (($? == $a)) #(()):num   [[]]: str
if [ $? -eq $a ] #(()):num   [[]]: str
#if (( 0 ))
then #we can connect to network
{
        echo "we can connect to network"
        ./ntpclient -s -h 59.124.196.84
}
else #we can't connect to network
{
        echo "we can't connect to network"
        ./flashtime
}
fi
echo $?