39 #define abortsig(sig)	(sig==SIGABRT || sig==SIGBUS || sig==SIGILL || sig==SIGSEGV)  argument
61 void	sh_fault(register int sig)  in sh_fault()  argument
69 	if(!(sig&SH_TRAP))  in sh_fault()
70 		signal(sig, sh_fault);  in sh_fault()
71 	sig &= ~SH_TRAP;  in sh_fault()
73 	if(sig==SIGWINCH)  in sh_fault()
88 		shp->savesig = sig;  in sh_fault()
91 	trap = shp->st.trapcom[sig];  in sh_fault()
92 	if(sig==SIGALRM && shp->bltinfun==b_sleep)  in sh_fault()
97 			shp->sigflag[sig] |= SH_SIGTRAP;  in sh_fault()
101 	if(shp->subshell && sig!=SIGINT && sig!=SIGQUIT && sig!=SIGWINCH && sig!=SIGCONT)  in sh_fault()
103 		shp->exitval = SH_EXITSIG|sig;  in sh_fault()
111 	flag = shp->sigflag[sig]&~SH_SIGOFF;  in sh_fault()
114 		if(sig==SIGINT && (shp->trapnote&SH_SIGIGNORE))  in sh_fault()
124 				if(sig==SIGTERM && job.in_critical)  in sh_fault()
128 			shp->lastsig = sig;  in sh_fault()
129 			sigrelease(sig);  in sh_fault()
134 			if(sig==SIGABRT || (abortsig(sig) && (ptr = malloc(1))))  in sh_fault()
139 					sh_done(shp,sig);  in sh_fault()
144 			if(sig <= shp->sigmax)  in sh_fault()
145 				shp->sigflag[sig] |= SH_SIGSET;  in sh_fault()
147 			if(abortsig(sig))  in sh_fault()
161 		shp->lastsig = sig;  in sh_fault()
167 		if(sig==SIGHUP && job.curpgid)  in sh_fault()
173 		shp->lastsig = sig;  in sh_fault()
176 		if(sig==SIGTSTP)  in sh_fault()
181 				sigrelease(sig);  in sh_fault()
190 		action = (*shp->bltinfun)(-sig,(char**)0,(void*)0);  in sh_fault()
200 	if(sig <= shp->sigmax)  in sh_fault()
201 		shp->sigflag[sig] |= flag;  in sh_fault()
206 		sigrelease(sig);  in sh_fault()
217 	register int sig, n;  in sh_siginit()  local
222 	if ((n = SIGRTMIN) > 0 && (sig = SIGRTMAX) > n && sig < SH_TRAP)  in sh_siginit()
225 		shp->sigruntime[SH_SIGRTMAX] = sig;  in sh_siginit()
231 		sig = (tp->sh_number&((1<<SH_SIGBITS)-1));  in sh_siginit()
232 		if (!(sig-- & SH_TRAP))  in sh_siginit()
235 				sig = shp->sigruntime[sig];  in sh_siginit()
236 			if(sig>n && sig<SH_TRAP)  in sh_siginit()
237 				n = sig;  in sh_siginit()
245 	for(tp=shtab_signals; sig=tp->sh_number; tp++)  in sh_siginit()
247 		n = (sig>>SH_SIGBITS);  in sh_siginit()
248 		if((sig &= ((1<<SH_SIGBITS)-1)) > (shp->sigmax+1))  in sh_siginit()
250 		sig--;  in sh_siginit()
252 			sig = shp->sigruntime[sig];  in sh_siginit()
253 		if(sig>=0)  in sh_siginit()
255 			shp->sigflag[sig] = n;  in sh_siginit()
257 				shp->sigmsg[sig] = (char*)tp->sh_value;  in sh_siginit()
265 void	sh_sigtrap(register int sig)  in sh_sigtrap()  argument
270 	if(sig==0)  in sh_sigtrap()
272 	else if(!((flag=sh.sigflag[sig])&(SH_SIGFAULT|SH_SIGOFF)))  in sh_sigtrap()
275 		if((fun=signal(sig,sh_fault))==SIG_IGN)   in sh_sigtrap()
277 			signal(sig,SIG_IGN);  in sh_sigtrap()
283 			if(sig==SIGALRM && fun!=SIG_DFL && fun!=sh_fault)  in sh_sigtrap()
284 				signal(sig,fun);  in sh_sigtrap()
287 		sh.sigflag[sig] = flag;  in sh_sigtrap()
296 	register int 	flag, sig = sh.sigmax;  in sh_sigdone()  local
298 	for(sig=sh.sigmax; sig>0; sig--)  in sh_sigdone()
300 		flag = sh.sigflag[sig];  in sh_sigdone()
302 			sh_sigtrap(sig);  in sh_sigdone()
314 	register int 	flag, sig=sh.st.trapmax;  in sh_sigreset()  local
315 	while(sig-- > 0)  in sh_sigreset()
317 		if(trap=sh.st.trapcom[sig])  in sh_sigreset()
319 			flag  = sh.sigflag[sig]&~(SH_SIGTRAP|SH_SIGSET);  in sh_sigreset()
324 				sh.st.trapcom[sig] = 0;  in sh_sigreset()
326 			else if(sig && mode>1)  in sh_sigreset()
328 				if(sig!=SIGCHLD)  in sh_sigreset()
329 					signal(sig,SIG_IGN);  in sh_sigreset()
333 			sh.sigflag[sig] = flag;  in sh_sigreset()
336 	for(sig=SH_DEBUGTRAP-1;sig>=0;sig--)  in sh_sigreset()
338 		if(trap=sh.st.trap[sig])  in sh_sigreset()
342 			sh.st.trap[sig] = 0;  in sh_sigreset()
355 void	sh_sigclear(register int sig)  in sh_sigclear()  argument
357 	register int flag = sh.sigflag[sig];  in sh_sigclear()
363 	if(trap=sh.st.trapcom[sig])  in sh_sigclear()
367 		sh.st.trapcom[sig]=0;  in sh_sigclear()
369 	sh.sigflag[sig] = flag;  in sh_sigclear()
378 	register int 	sig=sh.st.trapmax;  in sh_chktrap()  local
381 		sig=0;  in sh_chktrap()
409 	while(--sig>=0)  in sh_chktrap()
412 		if(sig==SIGCHLD)  in sh_chktrap()
415 		if(sh.sigflag[sig]&SH_SIGTRAP)  in sh_chktrap()
417 			sh.sigflag[sig] &= ~SH_SIGTRAP;  in sh_chktrap()
418 			if(trap=sh.st.trapcom[sig])  in sh_chktrap()
421 				if(sig==SIGPIPE && (fp=sfpool((Sfio_t*)0,sh.outpool,SF_WRITE)) && sferror(fp))  in sh_chktrap()
423  				sh.oldexit = SH_EXITSIG|sig;  in sh_chktrap()
503 	register int		sig=0;  in sh_exit()  local
507 		shp->exitval |= (sig=shp->lastsig);  in sh_exit()
523 		if(!shp->subshell && (sig=sh_fork(0,NIL(int*))))  in sh_exit()
527 			job_wait(sig);  in sh_exit()
564 		sh_done(shp,sig);  in sh_exit()
570 		sh_done(shp,sig);  in sh_exit()
587 void sh_done(void *ptr, register int sig)  in sh_done()  argument
594 	if(sig)  in sh_done()
595 		savxit = SH_EXITSIG|sig;  in sh_done()
621 …if((sh_isoption(SH_INTERACTIVE) && shp->login_sh) || (!sh_isoption(SH_INTERACTIVE) && (sig==SIGHUP…  in sh_done()
631 		sig = savxit&SH_EXITMASK;  in sh_done()
632 	if(sig)  in sh_done()
635 		signal(sig,SIG_DFL);  in sh_done()
636 		sigrelease(sig);  in sh_done()
637 		kill(getpid(),sig);  in sh_done()