信号通讯编程

/* bprocess.c */

#include <signal.h>
#include <unistd.h>
#include <stdio.h>

void myfunc(int a)
{
	printf("process B received SIGINT\n");
}

void main()
{
	signal(SIGINT,myfunc);
	pause();
}

# gcc bprocess.c -o bprocess
# ./bprocess
此时这个进程处于等待信号的状态
另开一个终端
# ps aux 查看bprocess的ID为11227
# kill -n SIGINT 11227
发送后bprocess进程就会打印出process B received SIGINT
 

/* aprocess.c */

#include <sys/types.h>
#include <signal.h>
#include <stdio.h>

void main(int argc, char *argv[])
{
	pid_t pid;
	
	pid = atoi(argv[1]);
	kill(pid,SIGINT);
}

# ./bprocess 此时处于等待信号
另开一终端
# gcc aprocess.c -o aprocess
# ps aux查看B进程的ID为11430
# ./aprocess 11430
此时bprocess进程就会打印出process B received SIGINT