#include <stdio.h>

 #include <stdlib.h>

 #include <string.h>

 #include <sys/stat.h>

 #include <sys/types.h>

 #include <fcntl.h>

 #include <poll.h>

 #define oops(x, n) { perror(x); exit(n); }

 int main()

 {

     mkfifo("fifo1", );

     mkfifo("fifo2", );    

     int fd1 = open("fifo1", O_RDWR);

     int fd2 = open("fifo2", O_RDWR);

     char buf[];

     for(;;)

     {

         struct pollfd pfd[] = {{, POLLIN}, {fd1, POLLIN}, {fd2, POLLIN}};

         int ret = poll(pfd, , );

         if(ret > )

         {

             if(pfd[].revents&POLLIN)

             {

                 scanf(" %[^\n]", buf);

                 printf("keypad:%s\n", buf);

                 if(strcmp(buf, "quit") == ) break;

             }

             if(pfd[].revents&POLLIN)

             {

                 int n = read(fd1, buf, sizeof(buf));

                 buf[n] = '\0';

                 printf("fifo1:%s", buf);

             }

             if(pfd[].revents&POLLIN)

             {

                 int n = read(fd2, buf, sizeof(buf));

                 buf[n] = '\0';

                 printf("fifo2:%s", buf);

             }

         }

     }

     close(fd1);

     close(fd2);

     unlink("fifo1");

     unlink("fifo2");

     return ;

 }

 #include <stdio.h>

 #include <stdlib.h>

 #include <string.h>

 #include <sys/stat.h>

 #include <sys/types.h>

 #include <fcntl.h>

 #include <poll.h>

 #define oops(x, n) { perror(x); exit(n); }

 int main()

 {

     mkfifo("fifo1", );

     mkfifo("fifo2", );    

     int fd1 = open("fifo1", O_RDWR);

     int fd2 = open("fifo2", O_RDWR);

     char buf[];

     for(;;)

     {

         struct pollfd pfd[] = {{, POLLIN}, {fd1, POLLIN}, {fd2, POLLIN}};

         int ret = poll(pfd, , );

         if(ret > )

         {

             if(pfd[].revents&POLLIN)

             {

                 scanf(" %[^\n]", buf);

                 printf("keypad:%s\n", buf);

                 if(strcmp(buf, "quit") == ) break;

             }

             if(pfd[].revents&POLLIN)

             {

                 int n = read(fd1, buf, sizeof(buf));

                 buf[n] = '\0';

                 printf("fifo1:%s", buf);

             }

             if(pfd[].revents&POLLIN)

             {

                 int n = read(fd2, buf, sizeof(buf));

                 buf[n] = '\0';

                 printf("fifo2:%s", buf);

             }

         }

     }

     close(fd1);

     close(fd2);

     unlink("fifo1");

     unlink("fifo2");

     return ;

 }