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Re: Termcap issue in cygwin
- From: Christopher Faylor <cygwin at cygwin dot com>
- To: cygwin at cygwin dot com
- Date: Wed, 3 Apr 2002 10:12:21 -0500
- Subject: Re: Termcap issue in cygwin
- References: <Pine.CYG.4.44.0204030354590.460-100000@MPC96>
- Reply-to: cygwin at cygwin dot com
On Wed, Apr 03, 2002 at 04:38:01AM -0800, Eduardo Chappa wrote:
> This message has two parts, the long story, and the short story. First
>the short story.
> As far as I understand, the function tgetent, has two parameters, which
>are documented in the manual for termcap(3) and tgetent, the first one is
>of type (char *). According to the manual of the unix system I am using
>the length of this string is supposed to be 1024. I have found that the
>entries for the linux and cygwin terminal are over 1024 characters long,
>which causes this function to corrupt the stack and the program dump core.
>A classical buffer overflow bug. I believe this is an issue with the
>termcap database, which I believe should be shortened to satisfy the 1024
>characters length requirement in (it seems) most (if not all) Unix
>Now the long story (which puts the short story in context). My real
>goal was to compile Pine for cygwin, which I did, and you are welcome
>to give it a try by downloading it from my web page (address below).
>The problem that I had was that every time that I started Pine in the
>cygwin terminal, it would dump core, due to the problem described
>above. Pine needed to be executed under rxvt, for example, in order to
>not to make it dump core. Although I believed for some time that rxvt
>was a requirement in order to execute Pine, now I realize that it is
>not, but my request instead is to make the work around of giving more
>space to the first argument of tgetent disappear.
>Is there any chance that both the linux and the cygwin entries will be
>shortened to less than 1024 characters?, or should I just have to
>accept this as a given?
Bottom line: If you want to submit a patch which accomplishes this
shortening without eliminating functionality, please do.
Otherwise, increasing the size of your buffer is the correct solution.
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