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#include<sys/types.h>
#include<wait.h>
#include<unistd.h>
#include<signal.h>
#include<stdio.h>
#include<stdlib.h>
typedef void(*sighandler_t)(int);
void sigcat()
{
printf("%d Process continuen",getpid());
}
int main(int argc,char*argv[])
{
int status_1,status_2;
signal(SIGINT,(sighandler_t)sigcat);//Registe a interrupt fuction
char *args1[]= {"/bin/ls","-a",NULL}; //两个进程
char *args2[]= {"/bin/ps","-a",NULL};
int pid1=fork();
if(pid1<0)
{
printf("Create Process failn");
}
if(pid1==0)
{
printf("ls -the child process starting%dn",getpid());
pause();//Wait for the interrupt
printf("ls the child process waking%dn",getpid());
status_1=execve(args1[0],args1,NULL);
exit(0);
}
else
{
//Father process
printf("n Father Process starting%dn ",getpid());
int pid2=fork();
if(pid2>0)
{
printf("ls the childprocess pause%dn",pid1);
waitpid(pid2,&status_2,0);
printf("pid2 is over");
printf("ls waking%dn",pid1);
kill(pid1,SIGINT);//运行p1
waitpid(pid1,&status_1,0);
printf("ls over%dn",pid1);
printf("Father process over%dn",getpid());
exit(0);
}
if(pid2<0)
{
printf("Process 2failsn");
}
if(pid2==0)
{
printf("ps starting%dn ",getpid());
status_2=execve(args2[0],args2,NULL);
exit(0);
}
}
return 0;
}
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