diff options
| author | Stephen Warren <swarren@nvidia.com> | 2014-02-03 13:21:10 -0700 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-02-19 09:47:34 -0500 |
| commit | b7b5f3195fa5a31ab1505e0c87054dc6dc71627b (patch) | |
| tree | 575752ba9711f80028817ee6ac1efd2f404f4452 /fs/fat | |
| parent | 55af5c9313607f3b6acba2fd915b263ef6a61dd4 (diff) | |
fat: implement exists() for FAT fs
This hooks into the generic "file exists" support added in an earlier
patch, and provides an implementation for the FAT filesystem.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'fs/fat')
| -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 b41d62e3c38..54f42eae0d0 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) |