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C/C++ ÅжÏ·¾¶ÎªÎļþ

/***************************************************
* º¯Êý˵Ã÷: Åжϵ±Ç°path²ÎÊýÊÇ·ñΪһ¸ö¿É¶ÁµÄÎļþ
* º¯Êý·µ»Ø: 0 - Îļþ¿Ì¶È 1 - ȨÏ޾ܾø -1 -º¯Êý´íÎó
*   ²Î Êý : path Îļþ·¾¶.
***************************************************/
int isReadFile(const char *path)
{
        struct stat info;
        int euid,egid;
        if ( 0!= stat(path,&info) )
        {
                return -1;
        }
        //if it is a file
        if( S_IFREG != (info.st_mode & S_IFMT ) )
        {
                return 1;
        }
        euid=geteuid();//returns the real user ID of the
current process
        egid=getegid();//returns the effective user ID of the
current process
        //if effective user is root
        if(euid==0)
        {
                if(info.st_mode & S_IRUSR || info.st_mode &
S_IRGRP ||info.st_mode & S_IROTH)
                {
                        return 0;
                }
         


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#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
/****************************************************
* º¯Êý¹¦ÄÜ: ÅжϲÎÊý·¾¶ÊÇ·ñΪ(ÕýÈ·µÄ)Ŀ¼
* º¯Êý·µ»Ø: 0Ϊ±íʾ·¾¶ÎªÎļþ,1Ϊ·ÇĿ¼.ÆäËûΪ´íÎó
*    ²ÎÊý: pathÎļþÐèÒªÅжϵÄĿ¼µÄ·¾¶.
*  ......
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