/* Skeleton of exim's delivery logic. 
 Problem with read() on line 32 */ 
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>

main()
{
	int fd, pid, l;
	char buffer[100];
	struct flock lock_data;

	/* The parent opens a file, sets close on exec and locks it */
	fd = open("try.c", O_RDWR | O_APPEND);
	printf("open: %d %d\n", fd, errno);

	l = fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
	printf("fcntl: %d %d\n", l, errno);

	lock_data.l_type = F_WRLCK;
	lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0;

	l = fcntl(fd, F_SETLK, &lock_data);
	printf("fcntl: %d %d\n", l, errno);

	pid = fork();
	if (pid == 0) {
		printf("Child\n");
		l = lseek(fd,  5, SEEK_SET);
		printf("lseek: %d %d\n", l, errno);
		l = read(fd, buffer, 10);            /* <=== */
		printf("read: %d %d\n", l, errno);
	} 
	else {
		sleep(1);
		printf("Parent %d\n", pid);
	}
}