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                ## getutline ## 從utmp 文件中查找特定的記錄 ### 相關函數 ### getutent,getutid,pututline ### 表頭文件 ### ``` #include<utmp.h> ``` ### 定義函數 ### ``` struct utmp *getutline (struct utmp *ut); ``` ### 函數說明 ### getutline()用來從目前utmp文件的讀寫位置逐一往后搜索ut_type為USER_PROCESS 或LOGIN_PROCESS 的記錄,而且ut_line 和ut->ut_line 相符。找到相符的記錄便將該數據以utmp 結構返回,utmp結構請參考getutent()。 ### 返回值 ### 返回utmp 結構數據,如果返回NULL 則表示已無數據,或有錯誤發生。 ### 范例 ### ``` #include<utmp.h> main() { struct utmp ut,*u; strcpy (ut.ut_line,”pts/1”); while ((u=getutline(&ut))){ printf(“%d %s %s %s \n”,u->ut_type,u->ut_user,u->ut_line,u->ut_host); } } ``` ### 執行 ### ``` 7 root pts/1 ```
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