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|ID||Category||Severity||Type||Date Submitted||Last Update|
|0001032||[1003.1(2013)/Issue7+TC1] System Interfaces||Objection||Enhancement Request||2016-03-08 01:28||2016-03-24 16:32|
|Final Accepted Text|
|Summary||0001032: FD_ISSET() should take a const fd_set *|
Implementations are explicitly permitted to only provide a macro version of FD_ISSET(), as that was historically the case. Since FD_ISSET() doesn't assign through its second argument, such macros have generally accepted a const fd_set * pointer.
To match that, implementations that provide it as function should be required to accept such usage as well. Note that since implementations are permitted to provide FD_ISSET() as a macro *without* a function version, a compliant application cannot take its address, so this incompatible change to the function type cannot affect a compliant application.
(OpenBSD has recently switched to providing FD_* as macros indirecting to inline functions and the version that didn't accept const fd_set* was found to break at least the hylafax and nxcomp 3rd-party applications.)
The declaration in the pselect,select section and in the <sys/select.h> section should be changed from:
int FD_ISSET(int fd, fd_set *fdset);
int FD_ISSET(int fd, const fd_set *fdset);
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edited on: 2016-03-10 06:10
This is the same as http://austingroupbugs.net/view.php?id=220 [^] which I filed but got closed. In my opinion it was incorrect that this got closed. The reasoning by msbrown was:
"What I should have written is that FD_ISSET() _can_ _be_ only a macro. I.e. there doesn't have to be an underlying function."
Though that is also true, that doesn't mean that 'const' keywords should intentionally be left out in case it *is* provided as a function. Also, even if it is a macro, requiring that the argument is 'const' also requires that the FD_ISSET() macro should work on constant fd_sets.
|2016-03-08 01:28||philip-guenther||New Issue|
|2016-03-08 01:28||philip-guenther||Name||=> Philip Guenther|
|2016-03-08 01:28||philip-guenther||Organization||=> OpenBSD|
|2016-03-08 01:28||philip-guenther||Section||=> FD_ISSET|
|2016-03-08 01:28||philip-guenther||Page Number||=> 1545|
|2016-03-08 01:28||philip-guenther||Line Number||=> 50609|
|2016-03-10 06:08||EdSchouten||Note Added: 0003093|
|2016-03-10 06:09||EdSchouten||Note Edited: 0003093|
|2016-03-10 06:10||EdSchouten||Note Edited: 0003093|
|2016-03-24 16:27||nick||Relationship added||duplicate of 0000220|
|2016-03-24 16:32||Don Cragun||Interp Status||=> ---|
|2016-03-24 16:32||Don Cragun||Status||New => Closed|
|2016-03-24 16:32||Don Cragun||Resolution||Open => Duplicate|
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