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pipe.c
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pipe.c
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#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<sys/wait.h>
int main()
{
int pipe1[2], pipe2[2];
int pid,status1,status2;
char pipe1_read[50],pipe1_write[50],pipe2_read[50],pipe2_write[50];
char new[50]="Hello";
status1=pipe(pipe1);
status2=pipe(pipe2);
if((status1==-1)||(status2==-1))
{
printf("pipe creation failed");
}
pid=fork();
if(pid>0) //parent process
{
printf("1st parent process\n");
printf("Enter the data =");
scanf("%s",pipe1_write);
write(pipe1[1],pipe1_write,50);
wait(NULL);
//2nd pipe reading the data
read(pipe2[0],pipe2_read,50);
printf("The data concatinated is %s",pipe2_read);
}
if(pid==0) //child process
{
read(pipe1[0],pipe1_read,30);
int i;
int k=strlen(new);
for(i=0;i<strlen(pipe1_read);i++)
new[k++]=pipe1_read[i];
new[k]='\0';
//sending concatinated string to pipe2
write(pipe2[1],new,50);
}
}