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1 #include <u.h>2 #include <signal.h>3 #define NOPLAN9DEFINES4 #include <libc.h>5 #include "9proc.h"7 extern char *_p9sigstr(int, char*);9 static struct {10 int sig;11 int restart;12 } sigs[] = {13 SIGHUP, 0,14 SIGINT, 0,15 SIGQUIT, 0,16 SIGILL, 0,17 SIGTRAP, 0,18 /* SIGABRT, */19 #ifdef SIGEMT20 SIGEMT, 0,21 #endif22 SIGFPE, 0,23 SIGBUS, 0,24 /* SIGSEGV, */25 SIGCHLD, 1,26 SIGSYS, 0,27 SIGPIPE, 0,28 SIGALRM, 0,29 SIGTERM, 0,30 SIGTSTP, 1,31 SIGTTIN, 1,32 SIGTTOU, 1,33 SIGXCPU, 0,34 SIGXFSZ, 0,35 SIGVTALRM, 0,36 SIGUSR1, 0,37 SIGUSR2, 0,38 #ifdef SIGINFO39 SIGINFO, 0,40 #endif41 };43 static void (*notifyf)(void*, char*);45 static void46 notifysigf(int sig)47 {48 int v;49 char tmp[64];50 Uproc *up;52 up = _p9uproc();53 v = p9setjmp(up->notejb);54 if(v == 0 && notifyf)55 (*notifyf)(nil, _p9sigstr(sig, tmp));56 else if(v == 2){57 if(0)print("HANDLED %d\n", sig);58 return;59 }60 if(0)print("DEFAULT %d\n", sig);61 signal(sig, SIG_DFL);62 kill(getpid(), sig);63 }65 int66 notify(void (*f)(void*, char*))67 {68 int i;69 struct sigaction sa;71 memset(&sa, 0, sizeof sa);72 if(f == 0)73 sa.sa_handler = SIG_DFL;74 else{75 notifyf = f;76 sa.sa_handler = notifysigf;77 }78 for(i=0; i<nelem(sigs); i++){79 if(sigs[i].restart)80 sa.sa_flags |= SA_RESTART;81 else82 sa.sa_flags &= ~SA_RESTART;83 sigaction(sigs[i].sig, &sa, 0);84 }85 return 0;86 }88 int89 noted(int v)90 {91 Uproc *up;93 up = _p9uproc();94 p9longjmp(up->notejb, v==NCONT ? 2 : 1);95 abort();96 return 0;97 }