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fat.c

Source contains low-bit mask syntaxReassigns seq_file count

SHA-256c60957113df12ceb07a4024560c6f4d896ca0009c459a7ab18ab8410f204e036

Evidence

imports <assert.h> lines 26–53

26:26…  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29
30#include <sys/cdefs.h>
31#ifndef lint
32__RCSID("$NetBSD: fat.c,v 1.18 2006/06/05 16:51:18 christos Exp $");
33#endif /* not lint */
34
35#include <sys/endian.h>
36#include <sys/queue.h>
37#include <sys/limits.h>
38#include <sys/mman.h>
39#include <sys/param.h>
40
41#include <assert.h>
42#include <stdbool.h>
43#include <stdlib.h>
44#include <string.h>
45#include <ctype.h>
46#include <stdio.h>
47#include <unistd.h>
48
49#include "ext.h"
50#include "fsutil.h"
51
52static int _readfat(struct fat_descriptor *);
53static inline struct bootblock* boot_of_(struc …

Reassigns seq_file count lines 128–144

12… ap == NULL)
return FSFATAL;
130
if (allone) {
memset(lbp->map, 0xff, bitmap_size);
lbp->count = bits;
} else {
lbp->count = 0;
⋯9 lines

Source contains low-bit mask syntax lines 228–236

11… uster: lower 4 bits belongs to the subsequent cluster */
if ((cl & 1) == 1)
retval >>= 4;
retval &= CLUST12_MASK;
⋯5 lines

Calls native write or sys_write lines 372–379

45… 
if (lseek(fd, fat_addr, SEEK_SET) != fat_addr ||
   (size_t)write(fd, entry->chunk, writesize) != writesize) {
	pfatal("Unable to write FAT");
	return (FSFATAL);
}
378
entry->dirty = false;

Maps a shared region read-only with mmap lines 709–724

4… t->is_mmapped = false;
fat->use_cache = false;
711
/* Attempt to mmap() first */
if (allow_mmap) {
fat->fatbuf = mmap(NULL, fat->fatsize,
⋯10 lines