1 /* Test raising a signal. 2 Copyright (C) 2011-2021 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #include <config.h> 18 19 #include <signal.h> 20 #include <unistd.h> 21 22 #include "signature.h" 23 SIGNATURE_CHECK (raise, int, (int)); 24 25 #include <stdlib.h> 26 27 #include "macros.h" 28 29 /* It is safe to use _Noreturn here: exit() never returns, and GCC knows that 30 exit() is a non-returning function, even on platforms where its declaration 31 in <stdlib.h> does not have the 'noreturn' attribute. */ 32 static _Noreturn void 33 handler (int sig) /* */ 34 { 35 _exit (0); 36 } 37 38 int 39 main (void) /* */ 40 { 41 /* Test behaviour for invalid argument. */ 42 ASSERT (raise (-1) != 0); 43 44 /* Test behaviour for SIGINT. */ 45 ASSERT (signal (SIGINT, handler) != SIG_ERR); 46 47 raise (SIGINT); 48 49 /* We should not get here, because the handler takes away the control. */ 50 exit (1); 51 }