Is it considered to be ok to not check the return code of close(2) in base?

Rodney W. Grimes freebsd-rwg at pdx.rh.CN85.dnsmgr.net
Mon Jan 8 16:55:26 UTC 2018


> 08.01.2018 23:13, Eric van Gyzen wrote:
> 
> > Right, which is the reason such bugs are hard to diagnose.  Optionally
> > killing the process on close->EBADF would help find buggy code when
> > another thread did NOT re-open the file descriptor between the two close
> > calls.
> 
> Wouldn't "close(f); assert(errno != EBADF);" be better?

Or even
#ifdef DEBUG_CLOSE
#define close(f)	close(f); assert(errno != EBADF);
#endif

Then the people that want to go chasing these errors can,
and the rest of us are untouched.


-- 
Rod Grimes                                                 rgrimes at freebsd.org


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