Re: BUG in ltdl.c - here's a PATCH

[Lutz Müller]

On Fri, 2002-06-14 at 18:23, Albert Chin wrote:
> Shouldn't we find out why filename is non-zero terminated?

No, you didn't get it. If you do

strncpy (filename, dir_name, strlen (dir_name));

filename will afterwards not be terminated by '\0' (unless filename has
previously been initialized to 0, for example by memset (filename, 0,
...)). If you copy a string, you need to copy the terminating '\0', too,
i.e. 

strncpy (filename, dir_name, strlen (dir_name) + 1);

> How about
> we initialize filename[0] = '\0' after alloc? Anyway, I don't think
> LT_EMALLOC should null-terminate the string (who knows if you're
> always allocating a string) but I think we *definitely* need to
> null-terminate filename after LT_EMALLOC.

Not quite right. We need to terminate the filename after dir_name got
copied over it without a terminating '\0'. That is, you could do a 

strncpy (filename, dir_name, strlen (dir_name));
filename[strlen (dir_name)] = '\0';

or initialize filename in its full length to '\0' before like

memset (filename, 0, filenamesize);
strncpy (filename, dir_name, strlen (dir_name));

but I like my one-liner better.

> Does the patch below work?

No, to no surprise.

Lutz
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