fix for 2777633 re: FAT creation time resolution

CHANGES.txt

@@ -74,6 +74,9 @@ when reading the raw character device.  patch by Rob Joyce.
 4/21/09: Bug Fix. Fixed issue 2778170 re: incorrect read size on resident
 attributes.  Patch by Jamie Butler. 
 
+4/21/09: Bug Fix. Fixed issue 2777633 re: missing second resolution on FAT
+creation times.  Reported by Eoghan Casey.
+
 ---------------- VERSION 3.0.0 -------------- 
 0/00/00: Update: Many, many, many API changes.
 

tsk3/fs/fatfs_meta.c

@@ -95,7 +95,7 @@ is_83_name(fatfs_dentry * de)
 ** 
 */
 static time_t
-dos2unixtime(uint16_t date, uint16_t time)
+dos2unixtime(uint16_t date, uint16_t time, uint8_t timetens)
 {
     struct tm tm1;
     time_t ret;
@@ -108,6 +108,9 @@ dos2unixtime(uint16_t date, uint16_t time)
     tm1.tm_sec = ((time & FATFS_SEC_MASK) >> FATFS_SEC_SHIFT) * 2;
     if ((tm1.tm_sec < 0) || (tm1.tm_sec > 60))
         tm1.tm_sec = 0;
+    // the ctimetens value has a range of 0 to 199
+    if (timetens > 100)
+        tm1.tm_sec++;
 
     tm1.tm_min = ((time & FATFS_MIN_MASK) >> FATFS_MIN_SHIFT);
     if ((tm1.tm_min < 0) || (tm1.tm_min > 59))
@@ -273,13 +276,13 @@ fatfs_dinode_copy(FATFS_INFO * fatfs, TSK_FS_META * fs_meta,
         if (FATFS_ISDATE(tsk_getu16(fs->endian, in->wdate)))
             fs_meta->mtime =
                 dos2unixtime(tsk_getu16(fs->endian, in->wdate),
-                tsk_getu16(fs->endian, in->wtime));
+                tsk_getu16(fs->endian, in->wtime), 0);
         else
             fs_meta->mtime = 0;
 
         if (FATFS_ISDATE(tsk_getu16(fs->endian, in->adate)))
             fs_meta->atime =
-                dos2unixtime(tsk_getu16(fs->endian, in->adate), 0);
+                dos2unixtime(tsk_getu16(fs->endian, in->adate), 0, 0);
         else
             fs_meta->atime = 0;
 
@@ -291,7 +294,7 @@ fatfs_dinode_copy(FATFS_INFO * fatfs, TSK_FS_META * fs_meta,
         if (FATFS_ISDATE(tsk_getu16(fs->endian, in->cdate)))
             fs_meta->crtime =
                 dos2unixtime(tsk_getu16(fs->endian, in->cdate),
-                tsk_getu16(fs->endian, in->ctime));
+                tsk_getu16(fs->endian, in->ctime), in->ctimeten);
         else
             fs_meta->crtime = 0;
 
@@ -753,6 +756,8 @@ fatfs_isdentry(FATFS_INFO * fatfs, fatfs_dentry * de)
         else if ((tsk_getu16(fs->endian, de->cdate) != 0) &&
             (FATFS_ISDATE(tsk_getu16(fs->endian, de->cdate)) == 0))
             return 0;
+        else if (de->ctimeten > 200)
+            return 0;
         else if ((tsk_getu16(fs->endian, de->adate) != 0) &&
             (FATFS_ISDATE(tsk_getu16(fs->endian, de->adate)) == 0))
             return 0;

tsk3/fs/tsk_fatfs.h

@@ -176,7 +176,7 @@ extern "C" {
         uint8_t ext[3];
         uint8_t attrib;
         uint8_t lowercase;
-        uint8_t ctimeten;       /* create times */
+        uint8_t ctimeten;       /* create times (ctimeten is 0-199) */
         uint8_t ctime[2];
         uint8_t cdate[2];
         uint8_t adate[2];       /* access time */