syscall: get rid of unused EPOLL* constants

EPOLLRDBAND is used for DECnet; and I'm pretty sure I won't be
updating any of our code to work with DECnet.

I've never found use for EPOLLHUP or EPOLLERR, either; so
disable those for now and add comments for things I might
actually use: EPOLLET and EPOLLONESHOT.

diff --git a/lib/PublicInbox/Syscall.pm b/lib/PublicInbox/Syscall.pm
index 4ef64cc3ede3c81584fd051a5f94ed61d13f0805..98110eaf587573ff829c6fc135876195dbfecbe1 100644 (file)
--- a/lib/PublicInbox/Syscall.pm
+++ b/lib/PublicInbox/Syscall.pm
@@ -22,11 +22,11 @@ use vars qw(@ISA @EXPORT_OK %EXPORT_TAGS $VERSION);
 $VERSION     = "0.25";
 @ISA         = qw(Exporter);
 @EXPORT_OK   = qw(sendfile epoll_ctl epoll_create epoll_wait
-                  EPOLLIN EPOLLOUT EPOLLERR EPOLLHUP EPOLLRDBAND
+                  EPOLLIN EPOLLOUT
                   EPOLL_CTL_ADD EPOLL_CTL_DEL EPOLL_CTL_MOD
                   EPOLLEXCLUSIVE);
 %EXPORT_TAGS = (epoll => [qw(epoll_ctl epoll_create epoll_wait
-                             EPOLLIN EPOLLOUT EPOLLERR EPOLLHUP EPOLLRDBAND
+                             EPOLLIN EPOLLOUT
                              EPOLL_CTL_ADD EPOLL_CTL_DEL EPOLL_CTL_MOD
                              EPOLLEXCLUSIVE)],
                 sendfile => [qw(sendfile)],
@@ -34,10 +34,12 @@ $VERSION     = "0.25";
 
 use constant EPOLLIN       => 1;
 use constant EPOLLOUT      => 4;
-use constant EPOLLERR      => 8;
-use constant EPOLLHUP      => 16;
-use constant EPOLLRDBAND   => 128;
+# use constant EPOLLERR      => 8;
+# use constant EPOLLHUP      => 16;
+# use constant EPOLLRDBAND   => 128;
 use constant EPOLLEXCLUSIVE => (1 << 28);
+# use constant EPOLLONESHOT => (1 << 30);
+# use constant EPOLLET => (1 << 31);
 use constant EPOLL_CTL_ADD => 1;
 use constant EPOLL_CTL_DEL => 2;
 use constant EPOLL_CTL_MOD => 3;