linux下把apache/php 执行权限设为root  

2011-09-17 13:20:36|  分类： php |  标签：linux  root  php  权限   |字号 订阅

    编译super后放到bin目录下,

   在PHP中执行shell_exex("super mkdir dir");

   super 原文件如下:

#include <stdio.h>    

#include <stdlib.h>    

#include <string.h>    

#include <sys/types.h>    

#include <unistd.h>

/*本工具是为PHP调用linux外部命令而写.

 *其原理是首先为apatch设置root权限，

 *接着调用system执行命令行参数，

 *最后返回命令行结果值

*/

int main(int argc, char* argv[])

{

uid_t uid ,euid;

char cmd[2048]={0};

int i,ret=0;

FILE * fp;

uid = getuid() ;

euid = geteuid();

//printf("my uid :%u/n",getuid());  //这里显示的是当前的uid 可以注释掉.

//printf("my euid :%u/n",geteuid()); //这里显示的是当前的euid

setreuid(euid, uid);  //交换这两个id

//printf("after setreuid uid :%u/n",getuid());

//printf("afer sertreuid euid :%u/n",geteuid());

for(i=1;i<argc;i++)

{

strcat(cmd,argv[i]);

strcat(cmd," ");

}

strcat(cmd,";echo $? > /tmp/system.return");

system(cmd); 

fp=fopen("/tmp/system.return","r");

if(fp)

{

fscanf(fp,"%d",&ret);

fclose(fp);

}

return ret;

} 
编译加上权限
chmod u+s super