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                ## getuid ## 取得真實的用戶識別碼 ### 相關函數 ### geteuid,setreuid,setuid ### 表頭文件 ### ``` #include<unistd.h> #include<sys/types.h> ``` ### 定義函數 ### ``` uid_t getuid(void); ``` ### 函數說明 ### getuid()用來取得執行目前進程的用戶識別碼。 ### 返回值 ### 用戶識別碼 ### 范例 ### ``` main() { printf(“uid is %d\n”,getuid()); } ``` ### 執行 ### ``` uid is 0 /*當使用root身份執行范例程序時*/ ```
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