Testdrace

[Mazen050]

No description provided.

[Mazen050]

#include "kernel/types.h"
#include "user/user.h"

int
main(void)
{
int fd[2];
char buf[50];

// Create pipe
if (pipe(fd) < 0) {
    fprintf(2, "pipe failed\n");
    exit(1);
}

int pid = fork();

if (pid < 0) {
    fprintf(2, "fork failed\n");
    exit(1);
}

if (pid == 0) {
    // CHILD PROCESS → Reader
    close(fd[1]);   // close write end

    read(fd[0], buf, sizeof(buf));
    printf("Child received: %s\n", buf);

    close(fd[0]);
} else {
    // PARENT PROCESS → Writer
    close(fd[0]);   // close read end

    char msg[] = "Hello from parent!";
    write(fd[1], msg, sizeof(msg));

    close(fd[1]);
    wait(0);
}

exit(0);

}