/* syssignal.h - System-dependent definitions for signals.
- Copyright (C) 1993 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1999 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#define SIGEMPTYMASK (empty_mask)
#define SIGFULLMASK (full_mask)
extern sigset_t empty_mask, full_mask;
+extern void init_signals P_ ((void));
/* POSIX pretty much destroys any possibility of writing sigmask as a
macro in standard C. We always define our own version because the
appears to be assumed in the source, for example data.c:arith_error. */
typedef RETSIGTYPE (*signal_handler_t) (/*int*/);
-signal_handler_t sys_signal (/*int signal_number, signal_handler_t action*/);
-sigset_t sys_sigblock (/*sigset_t new_mask*/);
-sigset_t sys_sigunblock (/*sigset_t new_mask*/);
-sigset_t sys_sigsetmask (/*sigset_t new_mask*/);
+signal_handler_t sys_signal P_ ((int signal_number, signal_handler_t action));
+sigset_t sys_sigblock P_ ((sigset_t new_mask));
+sigset_t sys_sigunblock P_ ((sigset_t new_mask));
+sigset_t sys_sigsetmask P_ ((sigset_t new_mask));
#define sys_sigdel(MASK,SIG) sigdelset (&MASK,SIG)
#else /* ! defined (POSIX_SIGNALS) */
#ifdef USG5_4
+extern SIGMASKTYPE sigprocmask_set;
+
#ifndef sigblock
-#define sigblock(sig) (sigprocmask (SIG_BLOCK, SIGEMPTYMASK | sig, NULL))
+#define sigblock(sig) \
+ (sigprocmask_set = SIGEMPTYMASK | (sig), \
+ sigprocmask (SIG_BLOCK, &sigprocmask_set, NULL))
#endif
-#define sigunblock(sig) (sigprocmask (SIG_SETMASK, SIGFULLMASK & ~(sig), NULL))
+#ifndef sigunblock
+#define sigunblock(sig) \
+ (sigprocmask_set = SIGFULLMASK & ~(sig), \
+ sigprocmask (SIG_SETMASK, &sigprocmask_set, NULL))
+#endif
#else
#ifdef USG
+#ifndef sigunblock
#define sigunblock(sig)
+#endif
#else
+#ifndef sigunblock
#define sigunblock(SIG) \
{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
+#endif
#endif /* ! defined (USG) */
#endif /* ! defined (USG5_4) */
#define sigfree() sigsetmask (SIGEMPTYMASK)
#endif /* not BSD4_1 */
+#if defined (SIGINFO) && defined (BROKEN_SIGINFO)
+#undef SIGINFO
+#endif
+#if defined (SIGIO) && defined (BROKEN_SIGIO)
+#undef SIGIO
+#endif
+#if defined (SIGPOLL) && defined (BROKEN_SIGPOLL)
+#undef SIGPOLL
+#endif
+#if defined (SIGTSTP) && defined (BROKEN_SIGTSTP)
+#undef SIGTSTP
+#endif
+#if defined (SIGURG) && defined (BROKEN_SIGURG)
+#undef SIGURG
+#endif
+#if defined (SIGAIO) && defined (BROKEN_SIGAIO)
+#undef SIGAIO
+#endif
+#if defined (SIGPTY) && defined (BROKEN_SIGPTY)
+#undef SIGPTY
+#endif
+
+
+#if NSIG < NSIG_MINIMUM
+# ifdef NSIG
+# undef NSIG
+# endif
+# define NSIG NSIG_MINIMUM
+#endif
+
#ifdef BSD4_1
#define SIGIO SIGTINT
/* sigfree is in sysdep.c */
#endif /* SIGCHLD */
#endif /* ! defined (SIGCLD) */
#endif /* VMS */
+
+#ifndef HAVE_STRSIGNAL
+/* strsignal is in sysdep.c */
+char *strsignal ();
+#endif