一、实现无名管道练习：父进程写入管道，子进程读取管道数据。
复制代码
#include<myhead.h>
int main(int argc, const char *argv[])
{
int fd[2];
char buff[1024]="王吕阳，崔庆权别卷了";
char s[1024];
if(pipe(fd)==-1)
{
perror("pipe");
return -1;
}
pid_t pid = fork();
if(pid==0)
{
close(fd[1]);//关闭写端
while(1)
{
sleep(1);
read(fd[0],s,sizeof(s));
printf("展旗善意提醒:%s\n",s);
}
close(fd[0]);//关闭读端
}else if(pid>0)
{
close(fd[0]);//关闭读端
while(1)
{
sleep(1);
write(fd[1],buff,sizeof(buff));
}
close(fd[1]);
}else
{
perror("fork");
return -1;
}
return 0;
}
二、有名管道练习实现一遍练习：创建2个子父进程，父进程写入管道1，子进程读取管道2，父进程写入管道2，子进程读取管道1，实现全双工通信。
复制代码
#include<myhead.h>
int main(int argc, const char *argv[])
{
int fd1 = open("./a",O_WRONLY);
int fd2 = open("./b",O_RDONLY);
char arr[1024];
char brr[1024];
if(fd1==-1||fd2==-1)
{
perror("open");
return -1;
}
pid_t pid = fork();
if(pid>0)
{
while(1)
{
printf("请输入内容:");
int res = read(0,arr,sizeof(arr));
write(fd1,arr,res);
}
close(fd1);
}else if(pid==0)
{
while(1)
{
int ress = read(fd2,brr,sizeof(brr));
if(ress==0)
{
printf("退出\n");
break;
}
write(1,brr,ress);
}
close(fd2);
}else
{
perror("fork");
return -1;
}
return 0;
}
#include<myhead.h>
int main(int argc, const char *argv[])
{
int fd1 = open("./a",O_RDONLY);
int fd2 = open("./b",O_WRONLY);
char arr[1024];
char brr[1024];
if(fd1==-1||fd2==-1)
{
perror("open");
return -1;
}
pid_t pid = fork();
if(pid>0)
{
while(1)
{
printf("请输入内容:");
int ress = read(0,brr,sizeof(brr));
write(fd2,brr,ress);
}
close(fd2);
}else if(pid==0)
{
while(1)
{
int res = read(fd1,arr,sizeof(arr));
if(res==0)
{
printf("退出\n");
break;
}
write(1,arr,res);
}
close(fd1);
}else
{
perror("fork");
return -1;
}
return 0;
}
三、进程间通信信号的默认，忽略，捕获实现一遍。
复制代码
#include<myhead.h>
void a(int b)
{
if(b==SIGTSTP)
{
printf("A\n");
}
}
int main(int argc, const char *argv[])
{
/* if(signal(SIGINT,SIG_IGN)==SIG_ERR)
{
perror("signal");
return -1;
}
if(signal(SIGINT,SIG_DFL)==SIG_ERR)
{
perror("signal");
return -1;
}
*/
if(signal(SIGTSTP,a)==SIG_ERR)
{
perror("signal");
return -1;
}
int k=0;
while(1)
{
sleep(1);
printf("按k=%d\n",k);
k++;
}
return 0;
}
四、思维导图
