1 fd04aace 2003-11-23 devnull #include <u.h>
  2 8ad51794 2004-03-25 devnull #include <signal.h>
  3 fd04aace 2003-11-23 devnull #define NOPLAN9DEFINES
  4 fd04aace 2003-11-23 devnull #include <libc.h>
  5 fd04aace 2003-11-23 devnull #include "9proc.h"
  6 fd04aace 2003-11-23 devnull 
  7 fd04aace 2003-11-23 devnull extern char *_p9sigstr(int, char*);
  8 fd04aace 2003-11-23 devnull 
  9 49588d5d 2003-12-17 devnull static struct {
 10 49588d5d 2003-12-17 devnull 	int sig;
 11 49588d5d 2003-12-17 devnull 	int restart;
 12 49588d5d 2003-12-17 devnull } sigs[] = {
 13 49588d5d 2003-12-17 devnull 	SIGHUP, 0,
 14 49588d5d 2003-12-17 devnull 	SIGINT, 0,
 15 49588d5d 2003-12-17 devnull 	SIGQUIT, 0,
 16 49588d5d 2003-12-17 devnull 	SIGILL, 0,
 17 49588d5d 2003-12-17 devnull 	SIGTRAP, 0,
 18 669250d1 2003-12-03 devnull /*	SIGABRT,	*/
 19 d2c4ee9e 2003-11-24 devnull #ifdef SIGEMT
 20 49588d5d 2003-12-17 devnull 	SIGEMT, 0,
 21 d2c4ee9e 2003-11-24 devnull #endif
 22 49588d5d 2003-12-17 devnull 	SIGFPE, 0,
 23 49588d5d 2003-12-17 devnull 	SIGBUS, 0,
 24 32f69c36 2003-12-11 devnull /*	SIGSEGV,	*/
 25 49588d5d 2003-12-17 devnull 	SIGCHLD, 1,
 26 49588d5d 2003-12-17 devnull 	SIGSYS, 0,
 27 49588d5d 2003-12-17 devnull 	SIGPIPE, 0,
 28 49588d5d 2003-12-17 devnull 	SIGALRM, 0,
 29 49588d5d 2003-12-17 devnull 	SIGTERM, 0,
 30 49588d5d 2003-12-17 devnull 	SIGTSTP, 1,
 31 49588d5d 2003-12-17 devnull 	SIGTTIN, 1,
 32 49588d5d 2003-12-17 devnull 	SIGTTOU, 1,
 33 49588d5d 2003-12-17 devnull 	SIGXCPU, 0,
 34 49588d5d 2003-12-17 devnull 	SIGXFSZ, 0,
 35 49588d5d 2003-12-17 devnull 	SIGVTALRM, 0,
 36 49588d5d 2003-12-17 devnull 	SIGUSR1, 0,
 37 49588d5d 2003-12-17 devnull 	SIGUSR2, 0,
 38 6c746070 2004-05-23 devnull 	SIGWINCH, 1,
 39 d2c4ee9e 2003-11-24 devnull #ifdef SIGINFO
 40 49588d5d 2003-12-17 devnull 	SIGINFO, 0,
 41 d2c4ee9e 2003-11-24 devnull #endif
 42 fd04aace 2003-11-23 devnull };
 43 fd04aace 2003-11-23 devnull 
 44 fd04aace 2003-11-23 devnull static void (*notifyf)(void*, char*);
 45 fd04aace 2003-11-23 devnull 
 46 fd04aace 2003-11-23 devnull static void
 47 fd04aace 2003-11-23 devnull notifysigf(int sig)
 48 fd04aace 2003-11-23 devnull {
 49 fd04aace 2003-11-23 devnull 	int v;
 50 fd04aace 2003-11-23 devnull 	char tmp[64];
 51 fd04aace 2003-11-23 devnull 	Uproc *up;
 52 fd04aace 2003-11-23 devnull 
 53 175b8a53 2004-04-21 devnull 	up = _p9uproc(1);
 54 fd04aace 2003-11-23 devnull 	v = p9setjmp(up->notejb);
 55 fd04aace 2003-11-23 devnull 	if(v == 0 && notifyf)
 56 fd04aace 2003-11-23 devnull 		(*notifyf)(nil, _p9sigstr(sig, tmp));
 57 fd04aace 2003-11-23 devnull 	else if(v == 2){
 58 fd04aace 2003-11-23 devnull if(0)print("HANDLED %d\n", sig);
 59 fd04aace 2003-11-23 devnull 		return;
 60 fd04aace 2003-11-23 devnull 	}
 61 fd04aace 2003-11-23 devnull if(0)print("DEFAULT %d\n", sig);
 62 fd04aace 2003-11-23 devnull 	signal(sig, SIG_DFL);
 63 fd04aace 2003-11-23 devnull 	kill(getpid(), sig);
 64 fd04aace 2003-11-23 devnull }
 65 fd04aace 2003-11-23 devnull 	
 66 fd04aace 2003-11-23 devnull int
 67 fd04aace 2003-11-23 devnull notify(void (*f)(void*, char*))
 68 fd04aace 2003-11-23 devnull {
 69 fd04aace 2003-11-23 devnull 	int i;
 70 c4097c29 2004-05-11 devnull 	struct sigaction sa, osa;
 71 fd04aace 2003-11-23 devnull 
 72 175b8a53 2004-04-21 devnull 	_p9uproc(0);
 73 669250d1 2003-12-03 devnull 	memset(&sa, 0, sizeof sa);
 74 d99b2f34 2004-03-26 devnull 	if(f == 0)
 75 669250d1 2003-12-03 devnull 		sa.sa_handler = SIG_DFL;
 76 fd04aace 2003-11-23 devnull 	else{
 77 fd04aace 2003-11-23 devnull 		notifyf = f;
 78 669250d1 2003-12-03 devnull 		sa.sa_handler = notifysigf;
 79 fd04aace 2003-11-23 devnull 	}
 80 49588d5d 2003-12-17 devnull 	for(i=0; i<nelem(sigs); i++){
 81 c4097c29 2004-05-11 devnull 		/*
 82 c4097c29 2004-05-11 devnull 		 * If someone has already installed a handler,
 83 c4097c29 2004-05-11 devnull 		 * It's probably some ld preload nonsense,
 84 c4097c29 2004-05-11 devnull 		 * like pct (a SIGVTALRM-based profiler).
 85 c4097c29 2004-05-11 devnull 		 * Leave it alone.
 86 c4097c29 2004-05-11 devnull 		 */
 87 c4097c29 2004-05-11 devnull 		sigaction(sigs[i].sig, nil, &osa);
 88 c4097c29 2004-05-11 devnull 		if(osa.sa_handler != SIG_DFL)
 89 c4097c29 2004-05-11 devnull 			continue;
 90 c4097c29 2004-05-11 devnull 		sigemptyset(&sa.sa_mask);
 91 c4097c29 2004-05-11 devnull 		sigaddset(&sa.sa_mask, i);
 92 49588d5d 2003-12-17 devnull 		if(sigs[i].restart)
 93 49588d5d 2003-12-17 devnull 			sa.sa_flags |= SA_RESTART;
 94 49588d5d 2003-12-17 devnull 		else
 95 49588d5d 2003-12-17 devnull 			sa.sa_flags &= ~SA_RESTART;
 96 c4097c29 2004-05-11 devnull 		sigaction(sigs[i].sig, &sa, nil);
 97 49588d5d 2003-12-17 devnull 	}
 98 fd04aace 2003-11-23 devnull 	return 0;
 99 fd04aace 2003-11-23 devnull }
100 fd04aace 2003-11-23 devnull 
101 fd04aace 2003-11-23 devnull int
102 fd04aace 2003-11-23 devnull noted(int v)
103 fd04aace 2003-11-23 devnull {
104 fd04aace 2003-11-23 devnull 	Uproc *up;
105 fd04aace 2003-11-23 devnull 
106 175b8a53 2004-04-21 devnull 	up = _p9uproc(1);
107 fd04aace 2003-11-23 devnull 	p9longjmp(up->notejb, v==NCONT ? 2 : 1);
108 fd04aace 2003-11-23 devnull 	abort();
109 fd04aace 2003-11-23 devnull 	return 0;
110 fd04aace 2003-11-23 devnull }