/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. */ #if !defined(_WIN32) #include "uv.h" #include "task.h" #include #include #include static void connection_cb(uv_stream_t* server_handle, int status); static void connect_cb(uv_connect_t* req, int status); static const int maxfd = 31; static unsigned connect_cb_called; static uv_tcp_t server_handle; static uv_tcp_t client_handle; TEST_IMPL(emfile) { struct sockaddr_in addr; struct rlimit limits; uv_connect_t connect_req; uv_loop_t* loop; int first_fd; #if defined(_AIX) || defined(__MVS__) /* On AIX, if a 'accept' call fails ECONNRESET is set on the socket * which causes uv__emfile_trick to not work as intended and this test * to fail. */ RETURN_SKIP("uv__emfile_trick does not work on this OS"); #endif /* Lower the file descriptor limit and use up all fds save one. */ limits.rlim_cur = limits.rlim_max = maxfd + 1; if (setrlimit(RLIMIT_NOFILE, &limits)) { ASSERT(errno == EPERM); /* Valgrind blocks the setrlimit() call. */ RETURN_SKIP("setrlimit(RLIMIT_NOFILE) failed, running under valgrind?"); } loop = uv_default_loop(); ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr)); ASSERT(0 == uv_tcp_init(loop, &server_handle)); ASSERT(0 == uv_tcp_init(loop, &client_handle)); ASSERT(0 == uv_tcp_bind(&server_handle, (const struct sockaddr*) &addr, 0)); ASSERT(0 == uv_listen((uv_stream_t*) &server_handle, 8, connection_cb)); /* Remember the first one so we can clean up afterwards. */ do first_fd = dup(0); while (first_fd == -1 && errno == EINTR); ASSERT(first_fd > 0); while (dup(0) != -1 || errno == EINTR); ASSERT(errno == EMFILE); close(maxfd); /* Now connect and use up the last available file descriptor. The EMFILE * handling logic in src/unix/stream.c should ensure that connect_cb() runs * whereas connection_cb() should *not* run. */ ASSERT(0 == uv_tcp_connect(&connect_req, &client_handle, (const struct sockaddr*) &addr, connect_cb)); ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT)); ASSERT(1 == connect_cb_called); /* Close the dups again. Ignore errors in the unlikely event that the * file descriptors were not contiguous. */ while (first_fd < maxfd) { close(first_fd); first_fd += 1; } MAKE_VALGRIND_HAPPY(loop); return 0; } static void connection_cb(uv_stream_t* server_handle, int status) { ASSERT(0 && "connection_cb should not be called."); } static void connect_cb(uv_connect_t* req, int status) { /* |status| should equal 0 because the connection should have been accepted, * it's just that the server immediately closes it again. */ ASSERT(0 == status); connect_cb_called += 1; uv_close((uv_handle_t*) &server_handle, NULL); uv_close((uv_handle_t*) &client_handle, NULL); } #else typedef int file_has_no_tests; /* ISO C forbids an empty translation unit. */ #endif /* !_WIN32 */