113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
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/* raise( int )
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This file is part of the Public Domain C Library (PDCLib).
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Permission is granted to use, modify, and / or redistribute at will.
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*/
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#include <signal.h>
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#ifndef REGTEST
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#include <stdio.h>
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#include <stdlib.h>
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extern void (*_PDCLIB_sigabrt)( int );
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extern void (*_PDCLIB_sigfpe)( int );
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extern void (*_PDCLIB_sigill)( int );
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extern void (*_PDCLIB_sigint)( int );
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extern void (*_PDCLIB_sigsegv)( int );
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extern void (*_PDCLIB_sigterm)( int );
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int raise( int sig )
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{
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void (*sighandler)( int );
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char const * message;
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switch ( sig )
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{
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case SIGABRT:
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sighandler = _PDCLIB_sigabrt;
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message = "Abnormal termination (SIGABRT)";
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break;
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case SIGFPE:
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sighandler = _PDCLIB_sigfpe;
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message = "Arithmetic exception (SIGFPE)";
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break;
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case SIGILL:
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sighandler = _PDCLIB_sigill;
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message = "Illegal instruction (SIGILL)";
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break;
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case SIGINT:
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sighandler = _PDCLIB_sigint;
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message = "Interactive attention signal (SIGINT)";
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break;
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case SIGSEGV:
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sighandler = _PDCLIB_sigsegv;
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message = "Invalid memory access (SIGSEGV)";
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break;
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case SIGTERM:
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sighandler = _PDCLIB_sigterm;
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message = "Termination request (SIGTERM)";
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break;
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default:
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fprintf( stderr, "Unknown signal #%d\n", sig );
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_Exit( EXIT_FAILURE );
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}
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if ( sighandler == SIG_DFL )
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{
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fputs( message, stderr );
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_Exit( EXIT_FAILURE );
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}
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else if ( sighandler != SIG_IGN )
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{
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sighandler = signal( sig, SIG_DFL );
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sighandler( sig );
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}
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return 0;
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}
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#endif
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#ifdef TEST
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#include "_PDCLIB_test.h"
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#include <stdlib.h>
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static volatile sig_atomic_t flag = 0;
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static int expected_signal = 0;
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static void test_handler( int sig )
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{
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TESTCASE( sig == expected_signal );
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flag = 1;
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}
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int main( void )
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{
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/* Could be other than SIG_DFL if you changed the implementation. */
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TESTCASE( signal( SIGABRT, SIG_IGN ) == SIG_DFL );
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/* Should be ignored. */
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TESTCASE( raise( SIGABRT ) == 0 );
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/* Installing test handler, old handler should be returned */
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TESTCASE( signal( SIGABRT, test_handler ) == SIG_IGN );
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/* Raising and checking SIGABRT */
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expected_signal = SIGABRT;
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TESTCASE( raise( SIGABRT ) == 0 );
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TESTCASE( flag == 1 );
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/* Re-installing test handler, should have been reset to default */
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/* Could be other than SIG_DFL if you changed the implementation. */
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TESTCASE( signal( SIGABRT, test_handler ) == SIG_DFL );
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/* Raising and checking SIGABRT */
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flag = 0;
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TESTCASE( raise( SIGABRT ) == 0 );
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TESTCASE( flag == 1 );
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/* Installing test handler for different signal... */
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TESTCASE( signal( SIGTERM, test_handler ) == SIG_DFL );
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/* Raising and checking SIGTERM */
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expected_signal = SIGTERM;
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TESTCASE( raise( SIGTERM ) == 0 );
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TESTCASE( flag == 1 );
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return TEST_RESULTS;
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}
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#endif
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