On 06/20/12 09:27, Bruce Evans wrote:
> On Wed, 20 Jun 2012, Eitan Adler wrote:
>> Log:
>> Don't close an uninitialized descriptor. [1]
>> Add a sanity check for the validity of the passed fd.
>
> Library functions shouldn't use assert() or abort().
Why not?
> The fd is not passed, but is a static variable under syslog()'s control.
I understood "passed fd" to mean "fd we're passing to _close".
>> closelog(void)
>> {
>> THREAD_LOCK();
>> - (void)_close(LogFile);
>> - LogFile = -1;
>> + assert(LogFile >= -1);
>
> Since this assert() can't fail (unless the CPU has a parity error or
> or the memory behind Logfile has a parity error or another memory error
> or was clobbered by a buffer overrun), this assert() doesn't break the
> library but just wastes space.
I asked eadler to include that on the basis that it made the code easier
to understand.
--
Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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