t1.c

linux源代码

#include <stdio.h>
#include <fcntl.h>
#include <sys/mman.h>

#define NAMESIZE 32

struct score_st {
	char name[NAMESIZE];
	int math;
	int chinese;
};

int
main()
{
	int i;
	int fd;
	struct score_st score[32];

	fd=open("/tmp/scores", O_WRONLY|O_CREAT|O_TRUNC, 0600);
	if (fd==-1) {
		perror("open()");
		exit(1);
	}

	for (i=0;i<32;++i) {
		snprintf(score[i].name, NAMESIZE, "stu%d", i+1);
		score[i].math=rand()%101;
		score[i].chinese=rand()%101;
	}

	write(fd, score, sizeof(struct score_st)*32);

	close(fd);

	exit(0);
}