lib/raise.c

   1 /* Provide a non-threads replacement for the POSIX raise function.
   2
   3    Copyright (C) 2002-2003, 2005-2006, 2009-2024 Free Software Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    This file is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* written by Jim Meyering and Bruno Haible */
  19
  20 #include <config.h>
  21
  22 /* Specification.  */
  23 #include <signal.h>
  24
  25 #if HAVE_RAISE
  26 /* Native Windows platform.  */
  27
  28 # include <errno.h>
  29
  30 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  31 #  include "msvc-inval.h"
  32 # endif
  33
  34 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  35 /* Forward declaration.  */
  36 static int raise_nothrow (int sig);
  37 # else
  38 #  define raise_nothrow raise
  39 # endif
  40
  41 #else
  42 /* An old Unix platform.  */
  43
  44 # include <unistd.h>
  45
  46 #endif
  47
  48 int
  49 raise (int sig)
  50 #undef raise
  51 {
  52 #if GNULIB_defined_signal_blocking && GNULIB_defined_SIGPIPE
  53   if (sig == SIGPIPE)
  54     return _gl_raise_SIGPIPE ();
  55 #endif
  56
  57 #if HAVE_RAISE
  58   return raise_nothrow (sig);
  59 #else
  60   return kill (getpid (), sig);
  61 #endif
  62 }
  63
  64 #if HAVE_RAISE && HAVE_MSVC_INVALID_PARAMETER_HANDLER
  65 static int
  66 raise_nothrow (int sig)
  67 {
  68   int result;
  69
  70   TRY_MSVC_INVAL
  71     {
  72       result = raise (sig);
  73     }
  74   CATCH_MSVC_INVAL
  75     {
  76       result = -1;
  77       errno = EINVAL;
  78     }
  79   DONE_MSVC_INVAL;
  80
  81   return result;
  82 }
  83 #endif