Differential D27458 Diff 90901 usr.sbin/makefs/ffs/mkfs.c

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usr.sbin/makefs/ffs/mkfs.c

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	* read a block from the file system			* read a block from the file system
	*/			*/
	void			void
	ffs_rdfs(daddr_t bno, int size, void bf, const fsinfo_t fsopts)			ffs_rdfs(daddr_t bno, int size, void bf, const fsinfo_t fsopts)
	{			{
	int n;			int n;
	off_t offset;			off_t offset;

	offset = bno * fsopts->sectorsize + fsopts->offset;			offset = (off_t)bno * fsopts->sectorsize + fsopts->offset;
	if (lseek(fsopts->fd, offset, SEEK_SET) < 0)			if (lseek(fsopts->fd, offset, SEEK_SET) < 0)
	err(1, "%s: seek error for sector %lld", __func__,			err(1, "%s: seek error for sector %lld", __func__,
	(long long)bno);			(long long)bno);
	n = read(fsopts->fd, bf, size);			n = read(fsopts->fd, bf, size);
	if (n == -1) {			if (n == -1) {
	abort();			abort();
	err(1, "%s: read error bno %lld size %d", __func__,			err(1, "%s: read error bno %lld size %d", __func__,
	(long long)bno, size);			(long long)bno, size);
	}			}
	else if (n != size)			else if (n != size)
	errx(1, "%s: read error for sector %lld", __func__,			errx(1, "%s: read error for sector %lld", __func__,
	(long long)bno);			(long long)bno);
	}			}

	/*			/*
	* write a block to the file system			* write a block to the file system
	*/			*/
	void			void
	ffs_wtfs(daddr_t bno, int size, void bf, const fsinfo_t fsopts)			ffs_wtfs(daddr_t bno, int size, void bf, const fsinfo_t fsopts)
	{			{
	int n;			int n;
	off_t offset;			off_t offset;

	offset = bno * fsopts->sectorsize + fsopts->offset;			offset = (off_t)bno * fsopts->sectorsize + fsopts->offset;
	if (lseek(fsopts->fd, offset, SEEK_SET) < 0)			if (lseek(fsopts->fd, offset, SEEK_SET) < 0)
	err(1, "%s: seek error for sector %lld", __func__,			err(1, "%s: seek error for sector %lld", __func__,
	(long long)bno);			(long long)bno);
	n = write(fsopts->fd, bf, size);			n = write(fsopts->fd, bf, size);
	if (n == -1)			if (n == -1)
	err(1, "%s: write error for sector %lld", __func__,			err(1, "%s: write error for sector %lld", __func__,
	(long long)bno);			(long long)bno);
	else if (n != size)			else if (n != size)
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