communication with pipe

iittashish447

Today created pipe and communication between files are established.

ritug1992

Implemented pipe to create connection between two different processes:

#include<stdio.h>

#include<unistd.h>

int main()

{

pid_t pid;

int arr[2],stat_val;

char ch[2],string[20];

if(pipe(arr))

{

perror("Creating pipe");

return -1;

}

printf("arr[0] is %d\n",arr[0]);

printf("arr[1] is %d\n",arr[1]);

gets(string);

write(arr[1],string,20);

pid = fork();

if(pid == 0)

{

printf("I am in child\n");

sprintf(ch,"%d",arr[0]);

execl("/home/ritu/emblogic/project_3/test_pipe",ch,NULL);

}

wait(&stat_val);

return 0;

}

test_pipe.c : // this process is called by the above process using execl call and pass fd for pipe to this process

#include<stdio.h>

int main(int argc , char * argv[])

{

char string[20];

int fd;

printf("fd received is %s\n",argv[0]);

fd = atoi(argv[0]);

read(fd,string,20);

printf("string read is %s",string);

return 0;

}