> Unneeded code path is there, but i'm not sure run overhead is
> measurable. Inflexibility and bug reports are, however.
Based on stripped, thus raceless-in-kernel
linux-2.6/fs/open.c:sys_faccessat()
Example expects non-error part to be likely, doesn't use "goto" in basic
stuff, isn't going to be used with unlikely_buggy(optimizing) GCC.
Comments?
# lang:C
asmlinkage long sys_feuidaccessat(int dfd, const char __user *filename, int mode)
{
struct nameidata nd;
int res;
/* where's F_OK, X_OK, W_OK, R_OK? */
if (!(mode & ~S_IRWXO)) {
/* here */
res = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW|LOOKUP_ACCESS, &nd);
if (!res) {
res = vfs_permission(&nd, mode);
/* SuS v2 requires we report a read only fs too */
if (res || special_file(nd.dentry->d_inode->i_mode)
|| !(mode & S_IWOTH))
{} else if (IS_RDONLY(nd.dentry->d_inode))
res = -EROFS;
path_release(&nd);
}
return res;
}
return -EINVAL;
}
#
--
sed 'sed && sh + olecom = love' << ''
-o--=O`C
#oo'L O
<___=E M
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
