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/* raise( int )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#include <signal.h>
#ifndef REGTEST
#include <stdio.h>
#include <stdlib.h>
extern void ( *_PDCLIB_sigabrt )( int );
extern void ( *_PDCLIB_sigfpe )( int );
extern void ( *_PDCLIB_sigill )( int );
extern void ( *_PDCLIB_sigint )( int );
extern void ( *_PDCLIB_sigsegv )( int );
extern void ( *_PDCLIB_sigterm )( int );
int raise( int sig )
{
void ( *sighandler )( int );
const char * message;
switch ( sig )
{
case SIGABRT:
sighandler = _PDCLIB_sigabrt;
message = "Abnormal termination (SIGABRT)";
break;
case SIGFPE:
sighandler = _PDCLIB_sigfpe;
message = "Arithmetic exception (SIGFPE)";
break;
case SIGILL:
sighandler = _PDCLIB_sigill;
message = "Illegal instruction (SIGILL)";
break;
case SIGINT:
sighandler = _PDCLIB_sigint;
message = "Interactive attention signal (SIGINT)";
break;
case SIGSEGV:
sighandler = _PDCLIB_sigsegv;
message = "Invalid memory access (SIGSEGV)";
break;
case SIGTERM:
sighandler = _PDCLIB_sigterm;
message = "Termination request (SIGTERM)";
break;
default:
fprintf( stderr, "Unknown signal #%d\n", sig );
_Exit( EXIT_FAILURE );
}
if ( sighandler == SIG_DFL )
{
fputs( message, stderr );
_Exit( EXIT_FAILURE );
}
else if ( sighandler != SIG_IGN )
{
/* FIXME: "The implementation shall behave as if no library function
calls the signal function."
*/
sighandler = signal( sig, SIG_DFL );
sighandler( sig );
}
return 0;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
#include <stdlib.h>
static volatile sig_atomic_t flag = 0;
static int expected_signal = 0;
static void test_handler( int sig )
{
TESTCASE( sig == expected_signal );
flag = 1;
}
int main( void )
{
void ( *sighandler )( int );
/* Could be other than SIG_DFL if you changed the implementation. */
sighandler = signal( SIGABRT, SIG_IGN );
#ifndef REGTEST
TESTCASE( sighandler == SIG_DFL );
#endif
/* Should be ignored. */
TESTCASE( raise( SIGABRT ) == 0 );
/* Installing test handler, old handler should be returned */
TESTCASE( signal( SIGABRT, test_handler ) == SIG_IGN );
/* Raising and checking SIGABRT */
expected_signal = SIGABRT;
TESTCASE( raise( SIGABRT ) == 0 );
TESTCASE( flag == 1 );
/* Re-installing test handler, should have been reset to default */
/* Could be other than SIG_DFL if you changed the implementation. */
sighandler = signal( SIGABRT, test_handler );
#ifndef REGTEST
TESTCASE( sighandler == SIG_DFL );
#endif
/* Raising and checking SIGABRT */
flag = 0;
TESTCASE( raise( SIGABRT ) == 0 );
TESTCASE( flag == 1 );
/* Installing test handler for different signal... */
TESTCASE( signal( SIGTERM, test_handler ) == SIG_DFL );
/* Raising and checking SIGTERM */
expected_signal = SIGTERM;
TESTCASE( raise( SIGTERM ) == 0 );
TESTCASE( flag == 1 );
/* void expression to avoid "unused" warning in regtest */
(void)sighandler;
return TEST_RESULTS;
}
#endif
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