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| author | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2018-09-11 15:58:59 +0900 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2018-09-23 21:55:29 +0200 |
| commit | b94b6be543c24ce8ce5debececb0af0708fbd97f (patch) | |
| tree | 30d3e8bd33cc34ce7c20785a26ac513147dba36f /fs/fat | |
| parent | f23101f9513064efa716a132b114b2c2748b7823 (diff) | |
| download | u-boot-b94b6be543c24ce8ce5debececb0af0708fbd97f.tar.gz u-boot-b94b6be543c24ce8ce5debececb0af0708fbd97f.tar.bz2 u-boot-b94b6be543c24ce8ce5debececb0af0708fbd97f.zip | |
fs: fat: handle "." and ".." of root dir correctly with fat_itr_resolve()
FAT's root directory does not have "." nor ".."
So care must be taken when scanning root directory with fat_itr_resolve().
Without this patch, any file path starting with "." or ".." will not be
resolved at all.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'fs/fat')
| -rw-r--r-- | fs/fat/fat.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 5f921e81e3..c475f12c4f 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -931,6 +931,27 @@ static int fat_itr_resolve(fat_itr *itr, const char *path, unsigned type) while (next[0] && !ISDIRDELIM(next[0])) next++; + if (itr->is_root) { + /* root dir doesn't have "." nor ".." */ + if ((((next - path) == 1) && !strncmp(path, ".", 1)) || + (((next - path) == 2) && !strncmp(path, "..", 2))) { + /* point back to itself */ + itr->clust = itr->fsdata->root_cluster; + itr->dent = NULL; + itr->remaining = 0; + itr->last_cluster = 0; + + if (next[0] == 0) { + if (type & TYPE_DIR) + return 0; + else + return -ENOENT; + } + + return fat_itr_resolve(itr, next, type); + } + } + while (fat_itr_next(itr)) { int match = 0; unsigned n = max(strlen(itr->name), (size_t)(next - path)); |