Find process and send signal to it in Kernel

工作上覺得還蠻實用的程式片段。

struct task_struct *p;  
struct siginfo info;
      
pid_t pid = -1;  
     
for_each_process(p) { 
   if (!strcmp(p->comm, "process name")){  
      pid = p->pid;      
      break;  
   }  
}


if(pid != -1){
   
   if(p != NULL) {
      info.si_signo = SIGUSR1;
      info.si_code = SI_QUEUE;
      info.si_int = 0x3;
      send_sig_info(SIGUSR1, &info, p);

      printk(KERN_EMERG "Send SIGUSR1 with value %d to %s(%d)\n", info.si_int, "process name", pid);
   }        

}