contrib/diffutils/lib/raise.c

   1 /* Provide a non-threads replacement for the POSIX raise function.
   2
   3    Copyright (C) 2002-2003, 2005-2006, 2009-2013 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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 General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://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 # include "msvc-inval.h"
  31
  32 # undef raise
  33
  34 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  35 static int
  36 raise_nothrow (int sig)
  37 {
  38   int result;
  39
  40   TRY_MSVC_INVAL
  41     {
  42       result = raise (sig);
  43     }
  44   CATCH_MSVC_INVAL
  45     {
  46       result = -1;
  47       errno = EINVAL;
  48     }
  49   DONE_MSVC_INVAL;
  50
  51   return result;
  52 }
  53 # else
  54 #  define raise_nothrow raise
  55 # endif
  56
  57 #else
  58 /* An old Unix platform.  */
  59
  60 # include <unistd.h>
  61
  62 # define rpl_raise raise
  63
  64 #endif
  65
  66 int
  67 rpl_raise (int sig)
  68 {
  69 #if GNULIB_defined_signal_blocking && GNULIB_defined_SIGPIPE
  70   if (sig == SIGPIPE)
  71     return _gl_raise_SIGPIPE ();
  72 #endif
  73
  74 #if HAVE_RAISE
  75   return raise_nothrow (sig);
  76 #else
  77   return kill (getpid (), sig);
  78 #endif
  79 }