Re: [boost] [filesystem] truncate() function?

Subject: Re: [boost] [filesystem] truncate() function?
From: OvermindDL1 (overminddl1_at_[hidden])
Date: 2009-10-15 02:40:28

On Wed, Oct 14, 2009 at 10:36 PM, Jonathan Franklin
<franklin.jonathan_at_[hidden]> wrote:
> On Wed, Oct 14, 2009 at 8:59 PM, Gottlob Frege <gottlobfrege_at_[hidden]> wrote:
>> It may be beyond the scope of Boost.Filesystem, but I'd really prefer
>> C++ exceptions to be thrown instead of SIG faults. Â Particularly if
>> I'm trying to write x-platform code, which might very well be the
>> reason I'm using Boost.Filesystem instead of direct OS calls in the
>> first place.
>
> I'm pretty sure that the C and C++ lib calls that write to a file will
> result in your app being terminated as a result of the signal in
> question when the file being written exceeds the max size.
>
> It's been a *long* time since I've written any posix signal handlers,
> but I think you're going to run into control flow problems if you try
> to convert this signal to a c++ exception. <cue expert commentary
> here>

Actually you could probably just set a global volatile boolean, and
return from the signal handler as normal.  Then test for that boolean
in the wrapper code, if true then set to false then throw the
exception, else return.