sal/osl/unx/salinit.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <config_features.h>
  21
  22 #include <sal/config.h>
  23
  24 #if defined MACOSX
  25 #include <cassert>
  26 #include <limits>
  27 #include <unistd.h>
  28 #include <sys/stat.h>
  29 #endif
  30
  31 #include <config_global.h>
  32 #include <osl/process.h>
  33 #include <sal/main.h>
  34
  35 #include "saltime.hxx"
  36 #include "soffice.hxx"
  37 #include <salusesyslog.hxx>
  38
  39 #if HAVE_SYSLOG_H
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <syslog.h>
  43 #endif
  44
  45 extern "C" {
  46
  47 void sal_detail_initialize(int argc, char ** argv) {
  48     if (argc == sal::detail::InitializeSoffice)
  49     {
  50         sal::detail::setSoffice();
  51         return;
  52     }
  53 #if defined MACOSX && !HAVE_FEATURE_MACOSX_SANDBOX
  54     // On macOS when not sandboxed, soffice can restart itself via exec (see
  55     // restartOnMac in desktop/source/app/app.cxx), which leaves all file
  56     // descriptors open, which in turn can have unwanted effects (see
  57     // <https://bugs.libreoffice.org/show_bug.cgi?id=50603> "Unable to update
  58     // LibreOffice without resetting user profile"). But closing fds in
  59     // restartOnMac before calling exec does not work, as additional threads
  60     // might still be running then, which can still use those fds and cause
  61     // crashes. Therefore, the simplest solution is to close fds at process
  62     // start (as early as possible, so that no other threads have been created
  63     // yet that might already have opened some fds); this is done for all kinds
  64     // of processes here, not just soffice, but hopefully none of our processes
  65     // rely on being spawned with certain fds already open. Unfortunately, Mac
  66     // macOS appears to have no better interface to close all fds (like
  67     // closefrom):
  68     long openMax = sysconf(_SC_OPEN_MAX);
  69     // When LibreOffice restarts itself on macOS 11 beta on arm64, for
  70     // some reason sysconf(_SC_OPEN_MAX) returns 0x7FFFFFFFFFFFFFFF,
  71     // so use a sanity limit here.
  72     if (openMax == -1 || openMax == std::numeric_limits<long>::max()) {
  73         openMax = 100000;
  74     }
  75     assert(openMax >= 0 && openMax <= std::numeric_limits< int >::max());
  76     for (int fd = 3; fd < int(openMax); ++fd) {
  77         struct stat s;
  78         if (fstat(fd, &s) != -1 && S_ISREG(s.st_mode))
  79             close(fd);
  80     }
  81 #endif
  82     sal_initGlobalTimer();
  83 #if HAVE_SYSLOG_H
  84     const char *use_syslog = getenv("SAL_LOG_SYSLOG");
  85     sal_use_syslog = use_syslog != nullptr && !strcmp(use_syslog, "1");
  86     if (sal_use_syslog)
  87         openlog("libreoffice", 0, LOG_USER);
  88 #endif
  89
  90     osl_setCommandArgs(argc, argv);
  91 }
  92
  93 void sal_detail_deinitialize() {}
  94
  95 }
  96
  97 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */