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 "sal/config.h"
  21
  22 #if defined MACOSX
  23 #include <cassert>
  24 #include <limits>
  25 #include <unistd.h>
  26 #include <sys/stat.h>
  27 #endif
  28
  29 #include "osl/process.h"
  30 #include "sal/main.h"
  31 #include "sal/types.h"
  32
  33 #if HAVE_SYSLOG_H
  34 #include <string.h>
  35 #include <syslog.h>
  36 // from sal/osl/all/log.cxx:
  37 extern bool sal_use_syslog;
  38 #endif
  39
  40 extern "C" {
  41
  42 void sal_detail_initialize(int argc, char ** argv) {
  43 #if defined MACOSX
  44     // On Mac OS X, soffice can restart itself via exec (see restartOnMac in
  45     // desktop/source/app/app.cxx), which leaves all file descriptors open,
  46     // which in turn can have unwanted effects (see
  47     // <https://bugs.freedesktop.org/show_bug.cgi?id=50603> "Unable to update
  48     // LibreOffice without resetting user profile").  But closing fds in
  49     // restartOnMac before calling exec does not work, as additional threads
  50     // might still be running then, which can still use those fds and cause
  51     // crashes.  Therefore, the simples solution is to close fds at process
  52     // start (as early as possible, so that no other threads have been created
  53     // yet that might already have opened some fds); this is done for all kinds
  54     // of processes here, not just soffice, but hopefully none of our processes
  55     // rely on being spawned with certain fds already open.  Unfortunately, Mac
  56     // OS X appears to have no better interface to close all fds (like
  57     // closefrom):
  58     long openMax = sysconf(_SC_OPEN_MAX);
  59     if (openMax == -1) {
  60         // Some random value, but hopefully sysconf never returns -1 anyway:
  61         openMax = 1024;
  62     }
  63     assert(openMax >= 0 && openMax <= std::numeric_limits< int >::max());
  64     for (int fd = 3; fd < openMax; ++fd) {
  65         struct stat s;
  66         if (fstat(fd, &s) != -1 && S_ISREG(s.st_mode))
  67             close(fd);
  68     }
  69 #endif
  70 #if HAVE_SYSLOG_H
  71     const char *use_syslog = getenv("SAL_LOG_SYSLOG");
  72     sal_use_syslog = use_syslog != NULL && !strcmp(use_syslog, "1");
  73     if (sal_use_syslog)
  74         openlog("libreoffice", 0, LOG_USER);
  75 #endif
  76
  77     osl_setCommandArgs(argc, argv);
  78 }
  79
  80 void sal_detail_deinitialize() {}
  81
  82 }
  83
  84 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */