Function dump_cachefile

freebsd/contrib/openzfs/cmd/zdb/zdb.c:3876–3920

}

static void
dump_cachefile(const char *cachefile)
{
	int fd;
	struct stat64 statbuf;
	char *buf;
	nvlist_t *config;

	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
		(void) printf("cannot open '%s': %s\n", cachefile,
		    strerror(errno));
		exit(1);
	}

	if (fstat64(fd, &statbuf) != 0) {
		(void) printf("failed to stat '%s': %s\n", cachefile,
		    strerror(errno));
		exit(1);
	}

	if ((buf = malloc(statbuf.st_size)) == NULL) {
		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
		    (u_longlong_t)statbuf.st_size);
		exit(1);
	}

	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
		(void) fprintf(stderr, "failed to read %llu bytes\n",
		    (u_longlong_t)statbuf.st_size);
		exit(1);
	}

	(void) close(fd);

	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
		(void) fprintf(stderr, "failed to unpack nvlist\n");
		exit(1);
	}

	free(buf);

	dump_nvlist(config, 0);

	nvlist_free(config);
}

/*
 * ZFS label nvlist stats