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fs/adfs: fix filename fixup handling for "/" and "//" names

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Avoid translating "/" and "//" directory entry names to the special
"." and ".." names by instead converting the first character to "^".

Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2019-03-24 14:00:35 +00:00
parent 5f8de4875c
commit fc722a0429
1 changed files with 11 additions and 4 deletions
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15
fs/adfs/dir.c
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@ -18,18 +18,25 @@ static DEFINE_RWLOCK(adfs_dir_lock);
void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj) void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj)
{ {
unsigned int i; unsigned int dots, i;
/* /*
* RISC OS allows the use of '/' in directory entry names, so we need * RISC OS allows the use of '/' in directory entry names, so we need
* to fix these up. '/' is typically used for FAT compatibility to * to fix these up. '/' is typically used for FAT compatibility to
* represent '.', so do the same conversion here. In any case, '.' * represent '.', so do the same conversion here. In any case, '.'
* will never be in a RISC OS name since it is used as the pathname * will never be in a RISC OS name since it is used as the pathname
* separator. * separator. Handle the case where we may generate a '.' or '..'
* name, replacing the first character with '^' (the RISC OS "parent
* directory" character.)
*/ */
for (i = 0; i < obj->name_len; i++) for (i = dots = 0; i < obj->name_len; i++)
if (obj->name[i] == '/') if (obj->name[i] == '/') {
obj->name[i] = '.'; obj->name[i] = '.';
dots++;
}
if (obj->name_len <= 2 && dots == obj->name_len)
obj->name[0] = '^';
obj->filetype = -1; obj->filetype = -1;