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pipe004.c
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pipe004.c
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#include<stdio.h>
#include<unistd.h>
int main() {
int pipefds1[2], pipefds2[2];
int rs1, rs2;
int pid;
char pipe1writemessage[20] = "Welcome";
char pipe2writemessage[20] = "Prakhar";
char readmessage[20];
rs1 = pipe(pipefds1);
if (rs1 == -1) {
printf("Unable to create pipe 1 \n");
return 1;
}
rs2 = pipe(pipefds2);
if (rs2 == -1) {
printf("Unable to create pipe 2 \n");
return 1;
}
pid = fork();
if (pid != 0) // Parent process
{
close(pipefds1[0]); // Close the unwanted pipe1 read side
close(pipefds2[1]); // Close the unwanted pipe2 write side
printf("Parent: Write pipe 1 – %s\n", pipe1writemessage);
write(pipefds1[1], pipe1writemessage, sizeof(pipe1writemessage));
read(pipefds2[0], readmessage, sizeof(readmessage));
printf("Parent: Read pipe 2 – %s\n", readmessage);
} else { //child process
close(pipefds1[1]); // Close the unwanted pipe1 write side
close(pipefds2[0]); // Close the unwanted pipe2 read side
read(pipefds1[0], readmessage, sizeof(readmessage));
printf("Child: Read pipe 1 – %s\n", readmessage);
printf("Child: Write pipe 2 – %s\n", pipe2writemessage);
write(pipefds2[1], pipe2writemessage, sizeof(pipe2writemessage));
}
return 0;
}