linuxÏÂcÓïÑԹػú³ÌÐò
/* Offtimer.c.For auto halt. */
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#define DELAY 60/* Time of sleeping */
int main()
{
time_t now;
struct tm *p;
while(1)
{
now = time(NULL);
sleep(DELAY);/* To reduce cpu occupation */
p = localtime(&now);
if ((p->tm_hour = 14) && (p->tm_min >= 30))/ *This means the system will halt after 14:30 or 14:31 */
system("poweroff"); / *'poweroff' is the command in Red Flag Linux
Desktop 5.0 to turn off the computer.To do this you should be root. */
}
return 0;
}
ÒýÓÃgcc±àÒ룬ÁíÍâÐèÒªÓÐrootÓû§µÄȨÀû²ÅÄÜÐС£
Ïà¹ØÎĵµ£º
£¨L2CAPÐÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPÐÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼Á¬½Ó¿ØÖƺÍÊÊÅäÐÒé (L2CAP) ΪÉϲãÐÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àÐÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãÐÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......
ÀýÒ»£º·¢ËÍSignaling Packet£º
Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
¶à¸öCommand¿ÉÒÔÔÚÒ»¸öC-frame£¨control frame£©Öз¢ËÍ¡£
Èç¹ûÒªÖ±½Ó·¢ËÍSignaling Command.ÐèÒª½¨Á¢SOCK_RAWÀàÐ͵ÄL2CAPÁ¬½ÓSocket¡£ÕâÑù²ÅÓлú»á×Ô¼ºÌî³äCommand Code£¬Identi ......
¡¡¡¡Õâ¶Îʱ¼äÀÏÅöµ½ÓÐÈËÎʼ°¸÷¸öLinux°æ±¾µÄ±¾µØrootÃÜÂëÆÆ½â·½·¨£¬ÎÒÕâÀï×Ô¼ºÒÔ¼°ÔÚÍøÂçÉÏËѼ¯ÁËЩ×ÊÁÏ£¬Ï£Íû¶Ô¿´µ½ÁËÕâÎÄÕ¶øÓÖÇ¡ºÃÓõõ½µÄ¼¼ÊõÈËÔ±Óеã°ïÖú£º
(Ò»)RedHat/CentOS/Fedora ϵͳÃÜÂëÆÆ½â
¡¡¡¡1.ÔÚgrubÑ¡Ïî²Ëµ¥°´E½øÈë±à¼Ä£Ê½
¡¡¡¡2.±à¼kernel ÄÇÐÐ×îºó¼ÓÉϿոñS (»òÕ߿ոñSingle)
¡¡¡¡3.°´B£¬Æô¶¯µ ......
tty0£6ÊÇlinux±¾µØÖÕ¶Ë£¬pts/xÊÇÔ¶³ÌµÇ½ÐèÒªµÄÖÕ¶Ë£¬±ÈÈçijÈËÒªtelnetµ½ÄãµÄ»ú×Ó£¬¾ÍÐèÒªÄãµÄϵͳÓÐpts/x¡£
»ù±¾¸ÅÄ
¡¡
¡¡1. tty(ÖÕ¶ËÉ豸µÄͳ³Æ):
¡¡¡¡ttyÒ»´ÊÔ´ÓÚTeletypes£¬»òÕßteletypewriters£¬ÔÀ´Ö¸µÄÊǵ紫´ò×Ö»ú£¬ÊÇͨ¹ý´®ÐÐÏßÓôòÓ¡»ú¼üÅÌͨ¹ýÔĶÁºÍ·¢ËÍÐÅÏ¢µÄ¶«Î÷£¬ºóÀ´Õâ¶«Î÷±»¼üÅÌÓëÏÔʾÆ÷È¡´ú ......
±àÒ룬±àÒë³ÌÐò¶ÁȡԴ³ÌÐò£¨×Ö·ûÁ÷£©£¬¶ÔÖ®½øÐдʷ¨ºÍÓï·¨µÄ·ÖÎö£¬½«¸ß¼¶ÓïÑÔÖ¸Áîת»»Îª¹¦ÄܵÈЧµÄ»ã±à´úÂ룬ÔÙÓÉ»ã±à³ÌÐòת»»Îª»úÆ÷ÓïÑÔ£¬²¢ÇÒ°´ÕÕ²Ù×÷ϵͳ¶Ô¿ÉÖ´ÐÐÎļþ¸ñʽµÄÒªÇóÁ´½ÓÉú³É¿ÉÖ´ÐгÌÐò¡£
CÔ´³ÌÐòÍ·Îļþ££>Ô¤±àÒë´¦Àí(cpp)££>±àÒë³ÌÐò±¾Éí££>ÓÅ»¯³ÌÐò££>»ã±à³ÌÐò££>Á´½Ó³ÌÐò--> ......