Pipeline communication of process communication

Write two programs, one is to write data to the pipeline, and the other is to read the data to the pipe.

The creation of famous pipelines Mkfifo

Read data: FIFO_READ.C

/*FIFO_READ.C*/#include<sys/types.h>#include<sys/stat.h>#include<errno.h>#include<fcntl.h>#include<stdio.h>#include<stdlib.h>#include<limits.h>#defineMyfifo "/tmp/myfifo"/* Famous pipe file name */#defineMax_buffer_size PIPE_BUF/* defined in LIMITS.H */intMain () {CharBuff[max_buffer_size]; intFD; intnread; /*determine if a named pipe already exists, and if it has not yet been created, create it with the appropriate permissions*/    if(Access (Myfifo, F_OK) = =-1)    {        if(Mkfifo (Myfifo,0666) <0) && (errno! =eexist)) {printf ("cannot create FIFO file\n"); Exit (1); }    }    /*Open a named pipe as read-only blocking*/FD=Open (Myfifo, o_rdonly); if(FD = =-1) {printf ("Open FIFO file error\n"); Exit (1); }         while(1) {memset (buff,0,sizeof(Buff)); if((nread = read (FD, buff, max_buffer_size)) >0) {printf ("Read '%s ' from fifo\n", Buff);    }} close (FD); Exit (0);}

Write Data:

/*fifo_write.c*/#include<sys/types.h>#include<sys/stat.h>#include<errno.h>#include<fcntl.h>#include<stdio.h>#include<stdlib.h>#include<limits.h>#defineMyfifo "/tmp/myfifo"/* Famous pipe file name */#defineMax_buffer_size PIPE_BUF/* defined in LIMITS.H */intMainintargcChar* argv[])/*parameter is the string that will be written*/{    intFD; CharBuff[max_buffer_size]; intNwrite; if(ARGC <=1) {printf ("Usage:./fifo_write string\n"); Exit (1); } sscanf (argv[1],"%s", Buff); /*Open FIFO pipeline as write-only blocking*/FD=Open (Myfifo, o_wronly); if(FD = =-1) {printf ("Open FIFO file error\n"); Exit (1); }    /*to write a string to the pipeline*/    if((Nwrite = write (fd, buff, max_buffer_size)) >0) {printf ("Write '%s ' to fifo\n", Buff);    } close (FD); return 0;}

Pipeline communication of process communication