diff options
| -rw-r--r-- | fs/fat/fat.c | 18 | ||||
| -rw-r--r-- | fs/fs.c | 2 | ||||
| -rw-r--r-- | include/fat.h | 1 |
3 files changed, 16 insertions, 5 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index b41d62e..54f42ea 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -808,7 +808,7 @@ __u8 do_fat_read_at_block[MAX_CLUSTSIZE] long do_fat_read_at(const char *filename, unsigned long pos, void *buffer, - unsigned long maxsize, int dols) + unsigned long maxsize, int dols, int dogetsize) { char fnamecopy[2048]; boot_sector bs; @@ -1152,7 +1152,10 @@ rootdir_done: subname = nextname; } - ret = get_contents(mydata, dentptr, pos, buffer, maxsize); + if (dogetsize) + ret = FAT2CPU32(dentptr->size); + else + ret = get_contents(mydata, dentptr, pos, buffer, maxsize); debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret); exit: @@ -1163,7 +1166,7 @@ exit: long do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols) { - return do_fat_read_at(filename, 0, buffer, maxsize, dols); + return do_fat_read_at(filename, 0, buffer, maxsize, dols, 0); } int file_fat_detectfs(void) @@ -1233,11 +1236,18 @@ int file_fat_ls(const char *dir) return do_fat_read(dir, NULL, 0, LS_YES); } +int fat_exists(const char *filename) +{ + int sz; + sz = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1); + return sz >= 0; +} + long file_fat_read_at(const char *filename, unsigned long pos, void *buffer, unsigned long maxsize) { printf("reading %s\n", filename); - return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO); + return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO, 0); } long file_fat_read(const char *filename, void *buffer, unsigned long maxsize) @@ -90,7 +90,7 @@ static struct fstype_info fstypes[] = { .probe = fat_set_blk_dev, .close = fat_close, .ls = file_fat_ls, - .exists = fs_exists_unsupported, + .exists = fat_exists, .read = fat_read_file, .write = fs_write_unsupported, }, diff --git a/include/fat.h b/include/fat.h index 2c951e7..c8eb7cc 100644 --- a/include/fat.h +++ b/include/fat.h @@ -188,6 +188,7 @@ file_read_func file_fat_read; int file_cd(const char *path); int file_fat_detectfs(void); int file_fat_ls(const char *dir); +int fat_exists(const char *filename); long file_fat_read_at(const char *filename, unsigned long pos, void *buffer, unsigned long maxsize); long file_fat_read(const char *filename, void *buffer, unsigned long maxsize); |