On 03/01/2016 09:14 PM, Michael Kerrisk (man-pages) wrote: > What happens with readdir() when it gets a filename that is larger > than 255 characters? Good question. Ugh. readdir will return a pointer to a struct dirent whose d_name member will not be null-terminated, but the memory following the struct dirent object will contain the rest of the name, and will eventually be null-terminated. This will work perfectly fine if you don't copy struct dirent objects using memcpy, and the compiler does not optimize things too much. We should implement compiler support for this wart: inhibit optimizations (I think there are already special cases for length-0 and length-1 arrays at the end, so it's not totally without precedent), and warn about sizeof (struct dirent) and using it as a (non-pointer) declarator. The second part is likely generally useful for structs whose size is not intended to be part of the ABI. Florian -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
