Thread: Sending Struct pointers through pipes 2

Okay sorry about before it was crazy So I tried to do a simplier test.

Code:

#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

typedef struct BUF
{
	 char* type;
	 char* level;
	int hi;
}__attribute__ ((packed)) BUF;

int main(){

	pid_t pida,  parent ;
	BUF* duh = malloc(sizeof(*duh));
	int rv;
	int	commpipe[2];		/* This holds the fd for the input & output of the pipe */
	/* Setup communication pipeline first */
	if (pipe( commpipe ) ) {
		fprintf(stderr,"Pipe error!\n");
		exit(1);
	}
	parent = getpid() ;   /* get parent of me, the parent */ 
	printf("main parent = %08X\n", getpid() ) ; 
	/* Fork Child #1 from "main" and check for errors */
	pida = fork() ; 

	if (pida == -1) { 
		fprintf(stderr,"Fork error 1. Exiting.\n");  /* something went wrong */
		exit(1);        
	}
	 	
	if (pida == 0 ) { 
		/* A zero PID indicates that this is the child process */
		sleep(5);
		read(commpipe[0], duh, sizeof(duh));
		printf("%s  pipe output %s\n",duh->type,   duh->level);
		exit(0);
	}
	
	else {
		/* A positive (non-negative) PID indicates the parent process */
		BUF* dang = malloc(sizeof(*dang));
		dang->type = "blood";
		dang->level = "hard";

		write(commpipe[1], dang, sizeof(dang));
		sleep(2);
		printf("Hello\n");
		sleep(2);
		printf("Goodbye\n");
		sleep(2);
		printf("exit\n");
		wait(&rv);				/* Wait for child process to end */
		fprintf(stderr,"Child exited with a %d value\n",rv);
	}
	return 0;
}

my output is
main parent = 000055D9
Hello
Goodbye
blood pipe output (null)
exit
Child exited with a 0 value

so basically the duh->level equals NULL even though i assigned it to be "hard" b4 the write? So I'm not really sure how pipes send data does it not do it like parts at a time?