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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [posix/] [src/] [signal_2.c] - Rev 532
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/* * signal(2) - Install signal handler * * COPYRIGHT (c) 1989-1999. * 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.OARcorp.com/rtems/license.html. * * $Id: signal_2.c,v 1.2 2001-09-27 11:59:17 chris Exp $ */ #include <signal.h> #include <errno.h> typedef void (*sighandler_t)(int); sighandler_t signal( int signum, sighandler_t handler ) { struct sigaction s; struct sigaction old; s.sa_handler = handler ; sigemptyset(&s.sa_mask); /* * Depending on which system we want to behave like, one of * the following versions should be chosen. */ /* #define signal_like_linux */ #if defined(signal_like_linux) s.sa_flags = SA_RESTART | SA_INTERRUPT | SA_NOMASK; s.sa_restorer= NULL ; #elif defined(signal_like_SVR4) s.sa_flags = SA_RESTART; #else s.sa_flags = 0; #endif sigaction( signum, &s, &old ); return (sighandler_t) old.sa_handler; }
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