diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/emulator/sys/common/erl_poll.c | 17 | ||||
| -rw-r--r-- | erts/emulator/test/driver_SUITE.erl | 24 |
2 files changed, 41 insertions, 0 deletions
diff --git a/erts/emulator/sys/common/erl_poll.c b/erts/emulator/sys/common/erl_poll.c index 70b5532af9..b4d1575ee5 100644 --- a/erts/emulator/sys/common/erl_poll.c +++ b/erts/emulator/sys/common/erl_poll.c @@ -803,6 +803,23 @@ update_pollset(ErtsPollSet *ps, int fd, ErtsPollOp op, ErtsPollEvents events) struct kevent evts[2]; struct timespec ts = {0, 0}; + if (op == ERTS_POLL_OP_ADD) { + /* This is a hack to make the "noshell" option work; kqueue can poll + * these fds but will not report EV_EOF, so we return NVAL to use the + * fallback instead. + * + * This may be common to all pipes but we have no way to tell whether + * an fd is a pipe or not. */ + switch (fd) { + case STDIN_FILENO: + case STDOUT_FILENO: + case STDERR_FILENO: + return ERTS_POLL_EV_NVAL; + default: + break; + } + } + #if defined(EV_DISPATCH) && !defined(__OpenBSD__) /* If we have EV_DISPATCH we use it, unless we are on OpenBSD as the behavior of EV_EOF seems to be edge triggered there and we need it diff --git a/erts/emulator/test/driver_SUITE.erl b/erts/emulator/test/driver_SUITE.erl index 7aff3a6ea1..6f5d639d04 100644 --- a/erts/emulator/test/driver_SUITE.erl +++ b/erts/emulator/test/driver_SUITE.erl @@ -81,6 +81,7 @@ thr_msg_blast/1, consume_timeslice/1, env/1, + poll_pipe/1, z_test/1]). -export([bin_prefix/2]). @@ -168,6 +169,7 @@ all() -> %% Keep a_test first and z_test last... thr_msg_blast, consume_timeslice, env, + poll_pipe, z_test]. groups() -> @@ -2693,3 +2695,25 @@ rpc(Config, Fun) -> ct:fail(Other) end end. + +poll_pipe(Config) when is_list(Config) -> + %% ERL-647; we wouldn't see any events on EOF when polling a pipe using + %% kqueue(2). + case os:type() of + {unix, _} -> + Command = "erl -noshell -eval " + "'\"DATA\n\" = io:get_line(\"\")," + "eof = io:get_line(\"\")," + "halt()' <<< 'DATA'", + Ref = make_ref(), + Self = self(), + Pid = spawn(fun() -> os:cmd(Command), Self ! Ref end), + receive + Ref -> ok + after 5000 -> + exit(Pid, kill), + ct:fail("Stuck reading from stdin.") + end; + _ -> + {skipped, "Unix-only test"} + end. |