ASSIGNMENT:-6
#include<stdio.h>
#include<unistd.h>
#include<string.h>
#include<stdlib.h>
int main(void)
int fd1[2], nbytes=1,fd2[2],a=0;
pid_t pid;
char string[80];
char readbuffer[80];
char ch='a',ch1='\n';
FILE *fp;
pipe(fd1);//PIPE CREATED
pipe(fd2);//PIPE CREATED
if((pid = fork()) == -1) /*Error in fork*/
perror("fork");
exit(1);
if(pid == 0)//Child Process
close(fd1[1]); /*closing write end of Pipe 1*/
read(fd1[0], readbuffer, sizeof(readbuffer)); /*reading filename
through Pipe 1*/
printf("\nFilename '%s' is being read by Child Process through Pipe
1...\n",readbuffer);
fp=fopen(readbuffer,"r");
close(fd1[0]); /*closing read end of Pipe 1*/
close(fd2[0]); /*closing read end of Pipe 2*/
printf("\nContents of %s are being sent to Parent Process through Pipe
2...\n",readbuffer);
while(a!=-1)
a=fscanf(fp,"%c",&ch);
write(fd2[1], &ch, sizeof(ch)); /*writing contents of file on
Pipe 2*/
close(fd2[1]); /*closing write end of Pipe 2*/
exit(0);
else //Parent process
close(fd1[0]); /*closing read end of Pipe 1*/
printf("IN PARENT PROCESS\n" );
printf("\nEnter name of file:");
scanf("%s",string);
printf("Filename is being sent by Parent Process to Child Process through
Pipe 1...\n");
write(fd1[1], string, (strlen(string)+1)); /*writing filename on Pipe 1*/
wait();
close(fd1[1]); /*closing write end of Pipe 1*/
close(fd2[1]); /*closing write end of Pipe 2*/
printf("\nContents of %s are being received by Parent Process through
Pipe 2...\n\n",string);
printf("IN PARENT PROCESS\n" );
printf("\nReceived Message:\n");
while(nbytes!=0)
printf("%c",ch1);
nbytes = read(fd2[0], &ch1, sizeof(ch1)); /*reading contents of
file from Pipe 2*/
}
close(fd2[0]); /*closing read end of Pipe 2*/
return(0);
Output:-
