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分享一个脚本，背景：公司要把项目文件中的.c文件修改成.cpp文件，然后解决编译问题；代码目录是通过samba共享出来，用source insight进行编辑，然而源文件权限基本是root用户，且差不多都是644，这样其他用户没有修改权限。

每次保存文件前都需要+w权限，修改完后再改回原权限。于是有了以下脚本：

# description: change c source file to cpp source file in "git mv",
# 			   and save access right to a file, change the file's
#              access right to "666" than other user can edit it.

#!/bin/sh

if [ $# -ne 1 ]; then
	echo "$0 directory"	
	exit 0
fi

cd $1
if [ $? -ne 0 ];then
	exit 1
fi

if [ -f accessRightsRecords ]; then
	rm -rf accessRightsRecords
fi
touch accessRightsRecords

for files in `ls`
do 
	if [ -f ${files} ]; then
		fileName=${files%.*} # get file name
		postFix=${files##*.} # get file postfix
		#echo ${fileName} ${postFix}
		if [ ${postFix} = "c" ]; then # if c source file
			accessRights=`stat -c %a ${files}` # get access rights in octal
			echo ${files} ${accessRights}
			cppFile=${fileName}.cpp
			git mv ${files} ${cppFile} # change c to cpp
			if [ -n accessRights ]; then  # access rights not nil
				echo ${cppFile} ${accessRights} >> accessRightsRecords # save original access right to a file
				chmod 666 ${cppFile} #change the access right
			fi
		elif [ ${postFix} = "cpp" ]; then
			accessRights=`stat -c %a ${files}` # get access rights in octal
			echo ${files} ${accessRights} >> accessRightsRecords
			chmod 666 ${files}
		fi
	fi
done

脚本跟一个参数(参数为目录，只支持一层目录，没有实现递归修改)，功能为：

1，找到.c文件，然后用git mv 修改成.cpp文件

2，将文件名及文件的权限(8进制形式)保存到一个文件时，方便用脚本恢复其权限

3，修改文件权限为666

恢复权限的脚本很简单：从文件里按行读取，得到文件名和权限，再用chmod修改其权限。

# description: recover access right to the file
#

#!/bin/sh

if [ $# -ne 1 ]; then
	echo "$0 directory"	
	exit 0
fi

cd $1

# file not exist, exit
if [ ! -e accessRightsRecords ]; then
    echo "can't find accessRightsRecords"
    exit 1
fi

cat accessRightsRecords | while read line
do
    cppFile=`echo ${line} | awk '{print $1}'`  # get the file name
    accessRights=`echo ${line} | awk '{print $2}'` # get the access right
    echo ${cppFile} ${accessRights}
    if [ -e ${cppFile} ]; then # file exist
        chmod ${accessRights} ${cppFile}
    fi
done

rm -rf accessRightsRecords