/* * COPYRIGHT (c) 1989-2007. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rtems.com/license/LICENSE. * * $Id$ */ #if HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /*PAGE * * _POSIX_signals_Check_signal */ boolean _POSIX_signals_Check_signal( POSIX_API_Control *api, int signo, boolean is_global ) { siginfo_t siginfo_struct; sigset_t saved_signals_blocked; if ( ! _POSIX_signals_Clear_signals( api, signo, &siginfo_struct, is_global, TRUE ) ) return FALSE; /* * Since we made a union of these, only one test is necessary but this is * safer. */ #if defined(RTEMS_DEBUG) assert( _POSIX_signals_Vectors[ signo ].sa_handler || _POSIX_signals_Vectors[ signo ].sa_sigaction ); #endif /* * Just to prevent sending a signal which is currently being ignored. */ if ( _POSIX_signals_Vectors[ signo ].sa_handler == SIG_IGN ) return FALSE; /* * Block the signals requested in sa_mask */ saved_signals_blocked = api->signals_blocked; api->signals_blocked |= _POSIX_signals_Vectors[ signo ].sa_mask; /* * Here, the signal handler function executes */ switch ( _POSIX_signals_Vectors[ signo ].sa_flags ) { case SA_SIGINFO: (*_POSIX_signals_Vectors[ signo ].sa_sigaction)( signo, &siginfo_struct, NULL /* context is undefined per 1003.1b-1993, p. 66 */ ); break; default: (*_POSIX_signals_Vectors[ signo ].sa_handler)( signo ); break; } /* * Restore the previous set of blocked signals */ api->signals_blocked = saved_signals_blocked; return TRUE; }