diff options
Diffstat (limited to 'fs/fat/fat.c')
| -rw-r--r-- | fs/fat/fat.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 2bb7adf..1f95eb4 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -274,6 +274,8 @@ get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer, { __u32 idx = 0; __u32 startsect; + __u32 nr_sect; + int ret; if (clustnum > 0) { startsect = mydata->data_begin + @@ -284,16 +286,19 @@ get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer, debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect); - if (disk_read(startsect, size / mydata->sect_size, buffer) < 0) { - debug("Error reading data\n"); + nr_sect = size / mydata->sect_size; + ret = disk_read(startsect, nr_sect, buffer); + if (ret != nr_sect) { + debug("Error reading data (got %d)\n", ret); return -1; } if (size % mydata->sect_size) { __u8 tmpbuf[mydata->sect_size]; idx = size / mydata->sect_size; - if (disk_read(startsect + idx, 1, tmpbuf) < 0) { - debug("Error reading data\n"); + ret = disk_read(startsect + idx, 1, tmpbuf); + if (ret != 1) { + debug("Error reading data (got %d)\n", ret); return -1; } buffer += idx * mydata->sect_size; @@ -803,6 +808,11 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize, mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0]; mydata->clust_size = bs.cluster_size; + if (mydata->sect_size != cur_part_info.blksz) { + printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n", + mydata->sect_size, cur_part_info.blksz); + return -1; + } if (mydata->fatsize == 32) { mydata->data_begin = mydata->rootdir_sect - |