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Linux Ðźż¯ dzÎö

  LinuxÐźÅÓжàÖÖ˵·¨¡£Ò»¸ö½ø³Ì´´½¨Ò»¸öÐźÅÓÃÓÚ·¢Ë͸øÁíÍâÒ»¸ö½ø³Ì½Ð×ö·¢ËÍÒ»¸öÐźţ¬Äں˴´½¨Ò»¸öÐźŽÐ×öÉú³ÉÒ»¸öÐźţ¬½ø³Ì×Ô¼ºÏò×Ô¼º·¢ËÍÐźŽÐ×ö»½ÆðÒ»¸öÐźš£²»¹ýÎÒ¿´Ò²Ã»±ØÒªÕâôѧ¾¿Æø¡£
  Ðźż¯--signel set,Æäʵ¾ÍÊǽ«¶à¸öÐźŷÅÔÚ¼¯ºÏÖнøÐм¯ÖеĴ¦Àí¡£POSIX.1¶¨ÒåÁËsigset_tÒÔ°üº­Ò»¸öÐźż¯£¬²¢ÇÒ¶¨ÒåÁËÎå¸ö´¦ÀíÐźŵĺ¯Êý£º
  int sigemptyset(sigset_t *set);
  int sigfillset(sigset_t *set);
  int sigaddset(sigset_t *set,int signo);
  int sigdelset(sigset_t *set,int signo)
  int sigismember(const sigset_t *set,int signo);
  »¹ÓÐÒ»¸öÖØÒªµÄº¯Êý£ºint sigprocmask(int how,const sigset_t *restrict set,sigset_t *restrict oset);
  µ¥´¿½²ÕâЩº¯ÊýºÜÄѽ²Ã÷°×£¬ÏÂÃæ½áºÏ³ÌÐòÀ´½²£¬³ÌÐòÀ´×ÔUNIX»·¾³¸ß¼¶±à³Ì£º
  
   static void sig_quit(int);   //ÐźŴ¦Àíº¯Êý
   int main( )
  {
     sigset_t newmask,oldmask,pendmask;
     if(signal(SIGQUIT,sig_quit)==SIG_ERR)
            err_sys("can not catch SIGQUIT");
     -----------------------------------------------------------------------------------------------------------
     sigemptyset(&newmask);    //Çå¿ÕÐźÅÑÚÂ뼯newmask,²»×èÈûÈκÎÐźÅ
     sigaddset(&newmask,SIGQUIT);  //½«SIGQUITÐźŷÅÈëÐźż¯newmaskÖÐÈ¥
    
     if(sigprocmask(SIG_BLOCK,&newmask,&oldmask)<0) //½«oldmask ºÍnewmaskºÏ²¢
             err_sys("SIG_BLOCK error");  //µ±Ç°ÐźÅÆÁ±Î×Ö·ÅÔÚnewmaskÀÒÔÇ°µÄ·ÅÔÚoldmaskÀï
    
     sleep(5);
     if(sigpending(&pendmask)<0)   //±£´æËùÓб»×èÈûµÄÐźţ¬±¾Àý¼´±£´æSIGQUITµ½pendmaskÖÐÈ¥
            


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ʵսLinux Bluetooth±à³Ì (Æß) SDPЭÒé

Service Discovery Protocol(SDP)ÌṩһÖÖÄÜÁ¦£¬ÈÃÓ¦ÓóÌÐòÓз½·¨·¢ÏÖÄÄÖÖ·þÎñ¿ÉÓÃÒÔ¼°ÕâÖÖ·þÎñµÄÌØÐÔ¡£
·þÎñ·¢ÏÖЭÒé(SDP»òBluetooth SDP)ÔÚÀ¶ÑÀЭÒéÕ»ÖжÔÀ¶ÑÀ»·¾³ÖеÄÓ¦ÓóÌÐòÓÐÌØÊâµÄº¬Ò⣬·¢ÏÖÄĸö·þÎñÊÇ¿ÉÓõĺÍÈ·¶¨ÕâЩ¿ÉÓ÷þÎñµÄÌØÕ÷¡£SDP¶¨ÒåÁËbluetooth client·¢ÏÖ¿ÉÓÃbluetooth server·þÎñºÍËüÃǵÄÌØÕ÷µÄ·½·¨¡£ ......

ÈçºÎÔÚLinuxÖÐÌí¼ÓеÄϵͳµ÷ÓÃ

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½Ú£¬´Ó¶øÆðµ½¼õÇáÓû§¸ºµ£ºÍ±£»¤ÏµÍ³ÒÔ¼°Ìá¸ß×ÊÔ´ÀûÓÃÂʵÄ×÷Óá£
¡¡¡¡Linux²Ù×÷ϵͳ ......

Linux Kernel Threads in Device Drivers

 Purpose
This examples shows how to create and stop a kernel thread.
The driver is implemented as a loadable module. In the init_module() routine five kernel threads are created. This kernel threads sleep one second, wake up, print a message and fall asleep again. On unload of the module (cle ......

linuxÖеĶ¯Ì¬¿âºÍ¾²Ì¬¿â

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    ¾²Ì¬¿â¾ÍÊÇÔÚ±àÒë¹ý³ÌÖÐһЩĿ±êÎļþµÄ¼¯ºÏ¡£¾²Ì¬¿âÔÚ³ÌÐòÁ´½ÓµÄʱºòʹÓã¬Á´½ÓÆ÷»á½«³ÌÐòÖÐʹÓõ½º¯ÊýµÄ´úÂë´Ó¿âÎļþÖп½±´µ½Ó¦ÓóÌÐòÖС£Ò»µ©Á´½ÓÍê³É£¬ÔÚÖ´ÐгÌÐòµÄʱºò¾Í²»ÐèÒª¾²Ì¬¿âÁË¡£
    ÓÉÓÚÿ¸öʹÓþ²Ì¬¿âµÄÓ¦ÓóÌÐò¶¼ÐèÒª¿½±´ËùÓú¯ÊýµÄ´úÂë£¬Ë ......

linux Ë«Íø¿¨·þÎñÆ÷NAT·þÎñ

debian lenny , my favorite
a. vim  /etc/sysctl.conf:
    modify net.ipv4.ip_forward = 1
b. flush route table:
    iptables -F
    iptables -P INPUT ACCEPT
    iptables -P FORWARD ACCEPT
c. open NAT services:
 &nb ......
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