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/* signal( int, void (*)( 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 <stdlib.h>
void ( *_PDCLIB_sigabrt )( int ) = SIG_DFL;
void ( *_PDCLIB_sigfpe )( int ) = SIG_DFL;
void ( *_PDCLIB_sigill )( int ) = SIG_DFL;
void ( *_PDCLIB_sigint )( int ) = SIG_DFL;
void ( *_PDCLIB_sigsegv )( int ) = SIG_DFL;
void ( *_PDCLIB_sigterm )( int ) = SIG_DFL;
void ( *signal( int sig, void ( *func )( int ) ) )( int )
{
void ( *oldhandler )( int );
if ( sig <= 0 || func == SIG_ERR )
{
return SIG_ERR;
}
switch ( sig )
{
case SIGABRT:
oldhandler = _PDCLIB_sigabrt;
_PDCLIB_sigabrt = func;
break;
case SIGFPE:
oldhandler = _PDCLIB_sigfpe;
_PDCLIB_sigfpe = func;
break;
case SIGILL:
oldhandler = _PDCLIB_sigill;
_PDCLIB_sigill = func;
break;
case SIGINT:
oldhandler = _PDCLIB_sigint;
_PDCLIB_sigint = func;
break;
case SIGSEGV:
oldhandler = _PDCLIB_sigsegv;
_PDCLIB_sigsegv = func;
break;
case SIGTERM:
oldhandler = _PDCLIB_sigterm;
_PDCLIB_sigterm = func;
break;
default:
/* The standard calls for an unspecified "positive value".
Copying Linux' behaviour of setting EINVAL.
*/
*_PDCLIB_errno_func() = _PDCLIB_EINVAL;
return SIG_ERR;
}
return oldhandler;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
int main( void )
{
/* Testing covered by raise.c */
return TEST_RESULTS;
}
#endif
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