Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Linux ÐźÅsignal´¦Àíº¯Êý


×î½ü×öµÄ¶«Î÷»¹ÕæÊÇÔÓÂÒÎÞÕÂ,  Óеã¸ú²»ÉϽø¶È,½Ó´¥µÄ¶¼ÊÇδ֪µÄ¶«Î÷.¼ÌÐøÀ©³ä..
alarm£¨ÉèÖÃÐźŴ«ËÍÄÖÖÓ£©
Ïà¹Øº¯Êý signal£¬sleep
±íÍ·Îļþ #include<unistd.h>
¶¨Ò庯Êý unsigned int alarm(unsigned int seconds);
º¯Êý˵Ã÷ alarm()ÓÃÀ´ÉèÖÃÐźÅSIGALRMÔÚ¾­¹ý²ÎÊýsecondsÖ¸¶¨µÄÃëÊýºó´«Ë͸øÄ¿Ç°µÄ½ø³Ì¡£Èç¹û²ÎÊýseconds Ϊ0£¬Ôò֮ǰÉèÖõÄÄÖÖӻᱻȡÏû£¬²¢½«Ê£ÏµÄʱ¼ä·µ»Ø¡£
·µ»ØÖµ·µ»ØÖ®Ç°ÄÖÖÓµÄÊ£ÓàÃëÊý£¬Èç¹û֮ǰδÉèÄÖÖÓÔò·µ»Ø0¡£
·¶Àý #include<unistd.h>
#include<signal.h>
void handler() {
printf("hello\n");
}
main()
{
int i;
signal(SIGALRM,handler);
alarm(5);
for(i=1;i<7;i++){
printf("sleep %d ...\n",i);
sleep(1);
}
}
Ö´ÐÐ sleep 1 ...
sleep 2 ...
sleep 3 ...
sleep 4 ...
sleep 5 ...
hello
sleep 6 ...
¡¡
kill£¨´«ËÍÐźŸøÖ¸¶¨µÄ½ø³Ì£©
Ïà¹Øº¯Êý raise£¬signal
±íÍ·Îļþ #include<sys/types.h>
#include<signal.h>
¶¨Ò庯Êý int kill(pid_t pid,int sig);
º¯Êý˵Ã÷ kill()¿ÉÒÔÓÃÀ´ËͲÎÊýsigÖ¸¶¨µÄÐźŸø²ÎÊýpidÖ¸¶¨µÄ½ø³Ì¡£²ÎÊýpidÓм¸ÖÖÇé¿ö:
pid>0 ½«ÐźŴ«¸ø½ø³Ìʶ±ðÂëΪpid µÄ½ø³Ì¡£
pid=0 ½«ÐźŴ«¸øºÍĿǰ½ø³ÌÏàͬ½ø³Ì×éµÄËùÓнø³Ì
pid=-1 ½«ÐźŹ㲥´«Ë͸øÏµÍ³ÄÚËùÓеĽø³Ì
pid<0 ½«ÐźŴ«¸ø½ø³Ì×éʶ±ðÂëΪpid¾ø¶ÔÖµµÄËùÓнø³Ì
²ÎÊýsig´ú±íµÄÐźűàºÅ¿É²Î¿¼¸½Â¼D
·µ»ØÖµ Ö´Ðгɹ¦Ôò·µ»Ø0£¬Èç¹ûÓдíÎóÔò·µ»Ø-1¡£
´íÎó´úÂë EINVAL ²ÎÊýsig ²»ºÏ·¨
ESRCH ²ÎÊýpid ËùÖ¸¶¨µÄ½ø³Ì»ò½ø³Ì×é²»´æÔÚ
EPERM ȨÏÞ²»¹»ÎÞ·¨´«ËÍÐźŸøÖ¸¶¨½ø³Ì
·¶Àý #include<unistd.h>
#include<signal.h>
#include<sys/types.h>
#include<sys/wait.h>
main()
{
pid_t pid;
int status;
if(!(pid= fork())){
printf("Hi I am child process!\n");
sleep(10);
return;
}
else{
printf("send signal to child process (%d) \n",pid);
sleep(1);
kill(pid ,SIGABRT);
wait(&status);
if(WIFSIGNALED(status))
printf("chile process receive signal %d\n",WTERMSIG(status));
}
}
Ö´ÐÐ sen signal to child process(3170)
Hi I am child process!
child process receive signal 6
pause£¨Èýø³ÌÔÝÍ£Ö±µ½ÐźųöÏÖ£©
Ïà¹Øº¯Êý kill£¬signal£¬sleep
±íÍ·Îļþ #include<unistd.h>
¶¨


Ïà¹ØÎĵµ£º

ʵսLinux Bluetooth±à³Ì(Áù) L2CAP±à³ÌʵÀý

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 ......

³£ÓÃlinuxÃüÁî

Ò»¡¢Óû§¹ÜÀíÀàÃüÁ
1¡¢Ìí¼ÓÓû§adduser
ÀýÈ磺ÔÚ192.168.20.11ÉÏ´´½¨Óû§yyj,ÊäÈëÈçÏÂÃüÁ
useradd yyj -s /bin/csh -d /home/yyj -m   
ÕâÑù´´½¨Íê³ÉÓû§yyj
2¡¢ÉèÖÃÓû§yyjµÄÃÜÂ룺
passwd   yyj
ÊäÈë2´Î¿ÚÁ¾ÍÉèÖÃÃÜÂë³É¹¦¡£
3¡¢É¾³ýÓû§yyj
rm -r yyj
¶þ¡¢½âѹÎļþ
³ ......

LinuxϱàÒëºÍ²¿ÊðJavaWeb³ÌÐò½Å±¾

 LinuxϱàÒëºÍ²¿ÊðJavaWeb³ÌÐò½Å±¾
Ŀ¼½á¹¹ÈçÏ£º
|
|---- YourProject
|             |-------- WebRoot
|             |          ......

Linux³£ÓÃÃüÁî

liunuxÈëÃų£ÓÃÃüÁî
liunux
  2009-04-13 17:04
  ÔĶÁ200   ÆÀÂÛ0
 

×ֺţº
´ó
´ó
 
ÖÐ
ÖÐ
 
С
С

¡¡Linux³£ÓÃÃüÁîµÄ·ÖÀà½éÉÜ£º
......

LinuxϵͳÐÅÏ¢²é¿´ÃüÁî´óÈ«

ϵͳ
# uname -a # ²é¿´ÄÚºË/²Ù×÷ϵͳ/CPUÐÅÏ¢
# head -n 1 /etc/issue # ²é¿´²Ù×÷ϵͳ°æ±¾
# cat /proc/cpuinfo # ²é¿´CPUÐÅÏ¢
# hostname # ²é¿´¼ÆËã»úÃû
# lspci -tv # ÁгöËùÓÐPCIÉ豸
# lsusb -tv # ÁгöËùÓÐUSBÉ豸
# lsmod # ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ