学习 Linux高级编程07_B

 

Sighandle.c

#include<stdio.h> #include<signal.h> void handle(int s) {          printf("hello  start\n");          sleep(10);          printf("hello  end\n"); } main() {          signal(SIGINT,  handle);          while(1); }

 

Sigaction.c

#include<stdio.h> #include<signal.h> #include<unist.h>   void handle(int s) {          printf("OOOK!\n");          sleep(5);          printf("KKKOn"); }   main() {          struct  sigaction act = {0};                   act.sa_handler  = handle;          sigemptyset(&act.sa_mask);          sigaddset(&act.sa_mask,  SIGINT);          act.sa_flags  = 0;          sigaction(SIGUSER1,&act,  0);          while(1); }

#include<stdio.h> #include<signal.h> #include<unist.h>   main() {          union  sigval val;          val.sival_int  = 9999;          sigqueue(3382,  SIGUSR1, val); }

#include<stdio.h> #include<signal.h> #include<unist.h>   void handle(int s, siginfo_t *info, void  *d) {          printf("OOOK!  %d\n" info->si_int);                   sleep(5);          printf("KKKOn"); }   main() {          struct  sigaction act = {0};                   //act.sa_handler  = handle;          act.sa_sigaction  = handle;          sigemptyset(&act.sa_mask);          sigaddset(&act.sa_mask,  SIGINT);          act.sa_flags  = SA_SIGINFO;          sigaction(SIGUSER1,&act,  0);          while(1); }

 

 

 

 

procA.c

#include<stdio.h> #include<fcntl.h> #include<sys/mman.h> main() {          int  *p;          int  fd;          int  i;          fd  = open("tmp.txt", O_RDWR| O_CREATE, 0666);          ftruncate(fd,  4); //文件4个字节          p  = mmap(0,                             4,                              PROT_READ|PROT_WRITE,                             MAP_SHARED,  fd, 0);          i  = 0;          while(1)          {                    sleep(1);                    *p  = i;                    i  ++;          }          close(fd); }

procB.c

#include<stdio.h> #include<fcntl.h> #include<sys/mman.h> main() {          int  *p;          int  fd;            fd  = open("tmp.txt", O_RDWR); //0666文件权限          ftruncate(fd,  4); //文件4个字节          p  = mmap(0,                             4,                              PROT_READ|PROT_WRITE,                             MAP_SHARED,  fd, 0);            while(1)          {                    sleep(1);                    printf("%d\n",  *p);          }          close(fd); }

 

 

Mkfifo

 

fifoA.c

#include<stdio.h> #include<fcntl.h> #include<unistd.h> #include<sys/stat.h> main() {          int  fd;//文件描述符          int  i;          mkfifo("my.pipe",0666)//1建立管道文件名，权限          fd  = open("my.pipe", O_RDWR);//2打开管道          i  = 0;          while(1)          {                    //3每隔1秒写数据                    sleep(1);                    write(fd,  &i, 4);                    i  ++;          }          close(fd);  //4关闭管道          unlink("my.pipe");  //5删除管道 }

fifoB.c

#include<stdio.h> #include<fcntl.h> #include<unistd.h> #include<sys/stat.h> main() {          int  fd;//文件描述符          int  i;          fd  = open("my.pipe", O_RDWR);//2打开管道          while(1)          {                    read(fd,  &i, 4);                    printf("%d\n",  i);          }          close(fd);  //4关闭管道 }

#include<stdio.h> #include<fcntl.h> #include<unistd.h> #include<sys/stat.h> #include<signal.h> #incldue<stdlib.h> //exit() int fd; int i;   void end(int s) {          close(fd);          unlink("my.pipe");          exit(-1); }   main() {          signal(SIGINT,  end);          mkfifo("my.pipe",0666)//1建立管道文件名，权限          fd  = open("my.pipe", O_RDWR);//2打开管道          i  = 0;          while(1)          {                    //3每隔1秒写数据                    sleep(1);                    write(fd,  &i, 4);                    i  ++;          } }

#include<stdio.h> #include<fcntl.h> #include<unistd.h> #include<sys/stat.h> #include<signal.h> #include<stdlib.h>   int fd;//文件描述符 void end(int s) {          close(fd);  //4关闭管道          exit(-1); }   main() {          int  i;          signal(SIGINT,  end);          fd  = open("my.pipe", O_RDWR);//2打开管道          while(1)          {                    read(fd,  &i, 4);                    printf("%d\n",  i);          } }

 

Pipe1.c

#include<stdio.h> #include<stdlib.h> #include<unistd.h> int main() {          int  fd[2];          int  r;          r  = pipe(fd);          printf("%d\n",  getpid());          while(1); }

#include<stdio.h> #include<stdlib.h> #include<unistd.h> int main() {          int  fd[2];          int  r;          char  buf[20];          printf("%d\n",  getpid());          r  = pipe(fd);          write(fd[1],  "hello", 5);          wirte(fd[1],  "word", 5);          r  = read(fd[0], buf, 20);          buf[r]  = 0;          printf("%s\n",  buf);          wirte(fd[1],  "louis", 5);          r  = read(fd[0], buf, 20);          buf[r]  = 0;          printf("%s\n",  buf);          while(1); }

 

Demo5.c

#include<unistd.h> #include<stdio.h>   main() {          int  fd[2];          pipe(fd);          if(fork())          {                    //parent                    close(fd[0]);  //读关闭，只负责写                    while(1)                    {                             write(fd[1],  "hello", 5);                             sleep(1);                    }          }          else          {                    //child                    char  buf[20];                    int  r;                    close(fd[1]);  //写关闭，只负责读                    while(1)                    {                             r=  read(fd[0], buf, 20);                             buf[r]  = 0;                             printf("%s\n",  buf);                    }                             } }

 

Demo6.c

#include<stdio.h> #include<unistd.h> #include<signal.h> #include<fcntl.h> #include<stdlib.h> #include<string.h>   main() {          int  a, b;          int  id=1;          while(1)          {                    if(id  == 1)                    {                             a  = 2;                             b  = 5000;                    }                    if(id  == 2)                    {                             a  = 5001;                             b  = 10000;                    }                    if(fork())                    {                             //父进程                             id  ++; //记录创建几个                             if(id  > 2)                             {                                      break;                             }                             continue;                    }                    else                    {                             //子进程                             while(1)                             {                                      sleep(1);                                      printf("pid=  %d : a = %d, b = %d\n", getpid(), a, b);                             }                             exit(0);                    }          }          while(1)          {                    //打开文件，准备存储                    printf("parent  save\n");                    sleep(1);          } }

#include<stdio.h> #include<unistd.h> #include<signal.h> #include<fcntl.h> #include<stdlib.h> #include<string.h> #include<sched.h> int isprimer(int ta) {          int  i = 2;          for(;  i < ta; i ++)          {                    if(ta  % i == 0)                    {                             return  0;                    }          }          return  1; }   main() {          int  a, b;          int  id=1;          while(1)          {                    if(id  == 1)                    {                             a  = 2;                             b  = 5000;                    }                    if(id  == 2)                    {                             a  = 5001;                             b  = 10000;                    }                    if(fork())                    {                             //父进程                             id  ++; //记录创建几个                             if(id  > 2)                             {                                      break;                             }                             continue;                    }                    else                    {                             //子进程                             int  i;                             for(i  = a; i <= b; i ++)                             {                                      if(isprimer(i))                                      {                                                printf("%d:  %d\n", getpid(), i);                                      }                                      usleep(100);                             }                             printf("%d  exit!\n", getpid());                             exit(0);                    }          }          while(1)          {                    //打开文件，准备存储                    printf("parent  save\n");                    sched_yield();  //sched.h          } }

#include<stdio.h> #include<unistd.h> #include<signal.h> #include<fcntl.h> #include<stdlib.h> #include<string.h>   int idx = 0; void handle(int s) {          int  status;          if(s  == SIGCHLD)          {                    wait(&status);                    printf("child  exit!\n");                    idx  ++;                    if(idx  == 2)                    {                             exit(-1);                    }          } }   int isprimer(int ta) {          int  i = 2;          for(;  i < ta; i ++)          {                    if(ta  % i == 0)                    {                             return  0;                    }          }          return  1; }   main() {          int  a, b;          int  id=1;          int  fd[2];          signal(SIGCHLD,  handle);          pipe(fd);          while(1)          {                    if(id  == 1)                    {                             a  = 2;                             b  = 30;                    }                    if(id  == 2)                    {                             a  = 31;                             b  = 60;                    }                    if(fork())                    {                             //父进程                             id  ++; //记录创建几个                             if(id  > 2)                             {                                      break;                             }                             continue;                    }                    else                    {                             //子进程                             int  i;                             close(fd[0]);                             for(i  = a; i <= b; i ++)                             {                                      if(isprimer(i))                                      {                                                write(fd[1],  &i, sizeof(int));                                      }                                      usleep(100);                             }                             printf("%d  exit!\n", getpid());                             exit(0);                    }          }          while(1)          {                    int  re;                                       //打开文件，准备存储                    close(fd[1]);                    read(fd[0],  &re, sizeof(int));                    printf("%d\n",  re);          } }

#include<stdio.h> #include<unistd.h> #include<signal.h> #include<fcntl.h> #include<stdlib.h> #include<string.h>   int idx = 0; int fddata = 0; void handle(int s) {          int  status;          if(s  == SIGCHLD)          {                    wait(&status);                    printf("child  exit!\n");                    idx  ++;                    if(idx  == 2)                    {                             close(fddata);                             printf("save  over!!!\n");                             exit(-1);                    }          } }   int isprimer(int ta) {          int  i = 2;          for(;  i < ta; i ++)          {                    if(ta  % i == 0)                    {                             return  0;                    }          }          return  1; }   main() {          int  a, b;          int  id=1;          int  fd[2];          signal(SIGCHLD,  handle);          pipe(fd);          while(1)          {                    if(id  == 1)                    {                             a  = 2;                             b  = 30;                    }                    if(id  == 2)                    {                             a  = 31;                             b  = 60;                    }                    if(fork())                    {                             //父进程                             id  ++; //记录创建几个                             if(id  > 2)                             {                                      break;                             }                             continue;                    }                    else                    {                             //子进程                             int  i;                             close(fd[0]);                             for(i  = a; i <= b; i ++)                             {                                      if(isprimer(i))                                      {                                                write(fd[1],  &i, sizeof(int));                                      }                                      usleep(100);                             }                             printf("%d  exit!\n", getpid());                             exit(0);                    }          }          int  re;          char  buf[20];          //打开文件，准备存储          close(fd[1]);          fddata  = open("result.txt",                                      O_RDWR  | O_CREAT, 0666);          while(1)          {                    read(fd[0],  &re, sizeof(int));                    sprintf(buf,  "%d\n", re);                    write(fddata,  buf, strlen(buf));          }          printf("parent  exit\n"); }