1 files changed, 126 insertions, 0 deletions
diff --git a/usr/src/lib/libast/common/misc/signal.c b/usr/src/lib/libast/common/misc/signal.c
new file mode 100644
index 0000000000..1eddd1329e
--- /dev/null
+++ b/usr/src/lib/libast/common/misc/signal.c
@@ -0,0 +1,126 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
+*                      and is licensed under the                       *
+*                  Common Public License, Version 1.0                  *
+*                      by AT&T Knowledge Ventures                      *
+*                                                                      *
+*                A copy of the License is available at                 *
+*            http://www.opensource.org/licenses/cpl1.0.txt             *
+*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+
+/*
+ * signal that disables syscall restart on interrupt with clear signal mask
+ * fun==SIG_DFL also unblocks signal
+ */
+
+#if !_UWIN
+
+#undef	signal
+#define signal		______signal
+
+#endif
+
+#include <ast.h>
+#include <sig.h>
+
+#if !_UWIN
+
+#undef	signal
+
+#undef	_def_map_ast
+#include <ast_map.h>
+
+#if defined(__EXPORT__)
+#define extern	__EXPORT__
+#endif
+
+#endif
+
+#if defined(SV_ABORT)                                         
+#undef	SV_INTERRUPT
+#define SV_INTERRUPT	SV_ABORT
+#endif
+
+#if !_std_signal && (_lib_sigaction && defined(SA_NOCLDSTOP) || _lib_sigvec && defined(SV_INTERRUPT))
+
+#if !defined(SA_NOCLDSTOP) || !defined(SA_INTERRUPT) && defined(SV_INTERRUPT)
+#undef	SA_INTERRUPT
+#define SA_INTERRUPT	SV_INTERRUPT
+#undef	sigaction
+#define sigaction	sigvec
+#undef	sigemptyset
+#define sigemptyset(p)	(*(p)=0)
+#undef	sa_flags
+#define sa_flags	sv_flags
+#undef	sa_handler
+#define sa_handler	sv_handler
+#undef	sa_mask
+#define	sa_mask		sv_mask
+#endif
+
+extern Sig_handler_t
+signal(int sig, Sig_handler_t fun)
+{
+	struct sigaction	na;
+	struct sigaction	oa;
+#ifdef SIGNO_MASK
+	unsigned int		flags;
+#endif
+
+#ifdef SIGNO_MASK
+	flags = sig & ~SIGNO_MASK;
+	sig &= SIGNO_MASK;
+#endif
+	if (fun == SIG_DFL)
+		sigunblock(sig);
+	memzero(&na, sizeof(na));
+	na.sa_handler = fun;
+#if defined(SA_INTERRUPT) || defined(SA_RESTART)
+	switch (sig)
+	{
+#if defined(SIGIO) || defined(SIGTSTP) || defined(SIGTTIN) || defined(SIGTTOU)
+#if defined(SIGIO)
+	case SIGIO:
+#endif
+#if defined(SIGTSTP)
+	case SIGTSTP:
+#endif
+#if defined(SIGTTIN)
+	case SIGTTIN:
+#endif
+#if defined(SIGTTOU)
+	case SIGTTOU:
+#endif
+#if defined(SA_RESTART)
+		na.sa_flags = SA_RESTART;
+#endif
+		break;
+#endif
+	default:
+#if defined(SA_INTERRUPT)
+		na.sa_flags = SA_INTERRUPT;
+#endif
+		break;
+	}
+#endif
+	return(sigaction(sig, &na, &oa) ? (Sig_handler_t)0 : oa.sa_handler);
+}
+
+#else
+
+NoN(signal)
+
+#endif