select returns unexpected errno 514 on signal (Linus was going to fix this?)

[Andrew Walrond <andrew@walrond.org>]

When debugging (with gdb) a usermode program which receives a signal during 
select(), select returns -1 and sets errno to 514, rather than the expected 
EINTR.

Googling finds this reply from Linus to a similar thread a couple years ago, 
which seems to suggest a patch was to be applied. If so, it hasn't been (this 
machine is running 2.6.3)

--------------------------
On Thu, 15 Aug 2002, Brian Wellington wrote: 
 > 
 > If that's the case, then how does 
 > fprintf(stderr, "select: %s\n", strerror(errno)); 
 > print 
 > select: Unknown error 514 
 > ? 
 > 
 > That's the traced process printing the error, not the tracing process. 
 
Ahh, dang, there's a patch floating around for this case. Basically, 
 tracing interferes with the normal behaviour (ie you _shouldn't_ see this 
 normally, only when tracing system calls). 

                linus 
-------------------------

Andrew Walrond