diff -u -x CVS -x work -x core -x *.core -x #* -x *~ -x *.orig -x *.rej -I $Id.*$ -I $.+BSD.*$ fault.c.orig fault.c
--- fault.c.orig	Fri Jun  4 02:51:01 2004
+++ fault.c	Sat Jun 19 18:42:22 2004
@@ -10,8 +10,54 @@
 #include	"defs.h"
 
 
+BOOL		trapnote;
 STRING		trapcom[MAXTRAP];
+#if defined(SYSIII)
+BOOL		trapflg[MAXTRAP] = {
+                0,
+                0,		/* Hangup */
+                SIGCAUGHT,      /* Interrupt */
+                SIGCAUGHT,	/* Quit */
+                0,		/* Illegal instruction */
+                0,		/* Trace/BPT trap */
+                0,		/* IOT trap */
+                0,		/* EMT trap */
+                0,		/* Floating exception */
+                0,		/* Killed */
+                0,		/* Bus error */
+                0,		/* Memory fault */
+                0,		/* Bad system call */
+                0,      	/* Broken pipe */
+                SIGCAUGHT,	/* Alarm call */
+                SIGCAUGHT,	/* Terminated */
+                0,		/* Urgent condition */
+                0,		/* Stopped */
+                0,		/* Stopped from terminal */
+                0,		/* Continued */
+                0,		/* Child terminated */
+                0,		/* Stopped on terminal input */
+                0,		/* Stopped on terminal output */
+                0,		/* Asynchronous I/O */
+                0,		/* Exceeded cpu time limit */
+                0,		/* Exceeded file size limit */
+                0,		/* Virtual time alarm */
+                0,		/* Profiling time alarm */
+                0,		/* Window size changed */
+                0,		/* Information request */
+                0,		/* User defined signal 1 */
+                0,		/* User defined signal 2 */
+                0		/* Thread interrupt */
+};
+#else /* V7 */
 BOOL		trapflg[MAXTRAP];
+#endif
+#if defined(RENO)
+BOOL		trapjmp[MAXTRAP];
+jmp_buf		INTbuf;
+#endif
+#if defined(SYSIII)
+BOOL		wasintr;
+#endif
 
 /* ========	fault handling routines	   ======== */
 
@@ -21,49 +67,77 @@
 {
 	REG INT		flag;
 
+#if defined(V7)
 	signal(sig,fault);
+#endif
 	IF sig==MEMF
-	THEN	IF setbrk(brkincr) == -1
+	THEN	IF setbrk(brkincr) == (BYTPTR)-1
 		THEN	error(nospace);
+			/*NOTREACHED*/
 		FI
 	ELIF sig==ALARM
 	THEN	IF flags&waiting
 		THEN	done();
+			/*NOTREACHED*/
 		FI
 	ELSE	flag = (trapcom[sig] ? TRAPSET : SIGSET);
 		trapnote |= flag;
 		trapflg[sig] |= flag;
+#if defined(SYSIII)
+		IF sig == INTR THEN wasintr++ FI
+#endif
 	FI
+#if defined(RENO)
+	IF trapjmp[sig] ANDF sig==INTR
+	THEN	trapjmp[sig] = 0;
+		longjmp(INTbuf, 1);
+	FI
+#endif
 }
 
-stdsigs()
+VOID	stdsigs()
 {
 	ignsig(QUIT);
 	getsig(INTR);
+#if defined(SYSIII)
+	signal(MEMF, fault);
+#else /* V7 */
 	getsig(MEMF);
+#endif
 	getsig(ALARM);
 }
 
-ignsig(n)
+SIGPTR	ignsig(n)
+	INT		n;
 {
-	REG INT		s, i;
+	REG INT		i;
+	REG SIGPTR	s=SIG_DFL;		/* GCC */
 
-	IF (s=signal(i=n,1)&01)==0
+#if defined(SYSIII)
+	IF (i=n)==MEMF
+	THEN	clrsig(i);
+		failed(badtrap, memfault);
+		/*NOTREACHED*/
+	ELIF (s=signal(i=n,SIG_IGN))==SIG_DFL
+#else /* V7 */
+	IF (s=signal(i=n,SIG_IGN))==SIG_DFL
+#endif
 	THEN	trapflg[i] |= SIGMOD;
 	FI
 	return(s);
 }
 
-getsig(n)
+VOID	getsig(n)
+	INT		n;
 {
 	REG INT		i;
 
-	IF trapflg[i=n]&SIGMOD ORF ignsig(i)==0
+	IF trapflg[i=n]&SIGMOD ORF ignsig(i)==SIG_DFL
 	THEN	signal(i,fault);
 	FI
 }
 
-oldsigs()
+VOID	oldsigs()
 {
 	REG INT		i;
 	REG STRING	t;
@@ -79,17 +153,24 @@
 	trapnote=0;
 }
 
-clrsig(i)
+VOID	clrsig(i)
 	INT		i;
 {
-	free(trapcom[i]); trapcom[i]=0;
+	free((BLKPTR) trapcom[i]); trapcom[i]=0;
 	IF trapflg[i]&SIGMOD
-	THEN	signal(i,fault);
+#if defined(SYSIII)
+	THEN	IF trapflg[i]&SIGCAUGHT
+		THEN signal(i, fault);
+		ELSE signal(i, SIG_DFL);
+		FI
 		trapflg[i] &= ~SIGMOD;
+#else /* V7 */
+	THEN	signal(i,fault);
+#endif
 	FI
 }
 
-chktrap()
+VOID	chktrap()
 {
 	/* check for traps */
 	REG INT		i=MAXTRAP;
@@ -99,7 +180,7 @@
 	WHILE --i
 	DO IF trapflg[i]&TRAPSET
 	   THEN trapflg[i] &= ~TRAPSET;
-		IF t=trapcom[i]
+		IF (t=trapcom[i])!=NIL		/* GCC */
 		THEN	INT	savxit=exitval;
 			execexp(t,0);
 			exitval=savxit; exitset();