#include	"dat.h"#include	"fns.h"#include	"error.h"#undef _POSIX_C_SOURCE #undef getwd#include	<unistd.h>#include	<thread.h>#include	<time.h>#include	<termios.h>#include	<signal.h>#include 	<pwd.h>#include	<sys/resource.h>#include	<sys/time.h> enum{	DELETE  = 0x7F};char *hosttype = "Unixware"; static thread_key_t	prdakey; static siginfo_t siginfo; extern int dflag; Proc*getup(void){	void *vp; 	if (thr_getspecific(prdakey, &vp))		return nil;	return vp;} voidpexit(char *msg, int t){	Osenv *e; 	lock(&procs.l);	if(up->prev)		up->prev->next = up->next;	else		procs.head = up->next; 	if(up->next)		up->next->prev = up->prev;	else		procs.tail = up->prev;	unlock(&procs.l); 	/*print("pexit: %s: %s\n", up->text, msg);*/	e = up->env;	if(e != nil) {		closefgrp(e->fgrp);		closepgrp(e->pgrp);		closeegrp(e->egrp);		closesigs(e->sigs);	}	free(up->prog);	sema_destroy(up->os);	free(up->os);	free(up);	thr_exit(0);} static void *tramp(void *v){	struct Proc *Up; 	if(thr_setspecific(prdakey, v)) {		print("set specific data failed in tramp\n");		thr_exit(0);	}	Up = v;	Up->sigid = thr_self();	Up->func(Up->arg);	pexit("", 0);} voidkproc(char *name, void (*func)(void*), void *arg, int flags){	thread_t thread;	Proc *p;	Pgrp *pg;	Fgrp *fg;	Egrp *eg;	sema_t *sem; 	p = newproc(); 	sem = malloc(sizeof(*sem));	if(sem == nil)		panic("can't allocate semaphore");	sema_init(sem, 0, USYNC_THREAD, 0);	p->os = sem; 	if(flags & KPDUPPG) {		pg = up->env->pgrp;		incref(&pg->r);		p->env->pgrp = pg;	}	if(flags & KPDUPFDG) {		fg = up->env->fgrp;		incref(&fg->r);		p->env->fgrp = fg;	}	if(flags & KPDUPENVG) {		eg = up->env->egrp;		incref(&eg->r);		p->env->egrp = eg;	} 	p->env->uid = up->env->uid;	p->env->gid = up->env->gid;	kstrdup(&p->env->user, up->env->user); 	strcpy(p->text, name); 	p->func = func;	p->arg = arg; 	lock(&procs.l);	if(procs.tail != nil) {		p->prev = procs.tail;		procs.tail->next = p;	}	else {		procs.head = p;		p->prev = nil;	}	procs.tail = p;	unlock(&procs.l); 	if(thr_create(0, 0, &tramp, p, THR_BOUND|THR_DETACHED, &thread))		panic("thr_create failed\n");	thr_yield();} /* to get pc on trap use siginfo.si_pc field and define all trap handlers	as printILL - have to set sa_sigaction, sa_flags not sa_handler*/ static voidtrapUSR1(void){	int intwait; 	intwait = up->intwait;	up->intwait = 0;	/* clear it to let proc continue in osleave */ 	if(up->type != Interp)		/* Used to unblock pending I/O */		return; 	if(intwait == 0)		/* Not posted so it's a sync error */		disfault(nil, Eintr);	/* Should never happen */} static voidtrapILL(void){	disfault(nil, "Illegal instruction");} static voidprintILL(int sig, siginfo_t *siginfo, void *v){	panic("Illegal instruction with code=%d at address=%x, opcode=%x.\n",		siginfo->si_code, siginfo->si_addr,*(char*)siginfo->si_addr);} static voidtrapBUS(void){	disfault(nil, "Bus error");} static voidtrapSEGV(void){	disfault(nil, "Segmentation violation");} static voidtrapFPE(void){	disfault(nil, "Floating point exception");} voidoshostintr(Proc *p){	thr_kill(p->sigid, SIGUSR1);} voidosblock(void){	while(sema_wait(up->os))		;	/* retry on signals */} voidosready(Proc *p){	sema_post(p->os);} voidoslongjmp(void *regs, osjmpbuf env, int val){	USED(regs);	siglongjmp(env, val);} static struct termios tinit; static voidtermset(void){	struct termios t; 	tcgetattr(0, &t);	tinit = t;	t.c_lflag &= ~(ICANON|ECHO|ISIG);	t.c_cc[VMIN] = 1;	t.c_cc[VTIME] = 0;	tcsetattr(0, TCSANOW, &t);} static voidtermrestore(void){	tcsetattr(0, TCSANOW, &tinit);} voidcleanexit(int x){	USED(x); 	if(up->intwait) {		up->intwait = 0;		return;	} 	if(dflag == 0)		termrestore();	exit(0);} int gidnobody= -1, uidnobody= -1; voidgetnobody(void){	struct passwd *pwd;		if (pwd=getpwnam("nobody")) {		uidnobody = pwd->pw_uid;		gidnobody = pwd->pw_gid;	}} voidosreboot(char *file, char **argv){	if(dflag == 0)		termrestore();	execvp(file, argv);	panic("reboot failure");} voidlibinit(char *imod){	struct Proc *Up;	struct sigaction act;	struct passwd *pw;	char sys[64]; 	setsid(); 	if(dflag == 0)		termset(); 	gethostname(sys, sizeof(sys));	kstrdup(&ossysname, sys);	getnobody(); 	memset(&act, 0 , sizeof(act));	act.sa_handler=trapUSR1;	sigaction(SIGUSR1, &act, nil);	/*	 * For the correct functioning of devcmd in the	 * face of exiting slaves	 */	signal(SIGPIPE, SIG_IGN);	if(signal(SIGTERM, SIG_IGN) != SIG_IGN)		signal(SIGTERM, cleanexit);	if(sflag == 0) {		act.sa_handler = trapBUS;		sigaction(SIGBUS, &act, nil);		act.sa_handler = trapILL;		sigaction(SIGILL, &act, nil);		act.sa_handler = trapSEGV;		sigaction(SIGSEGV, &act, nil);		act.sa_handler = trapFPE;		sigaction(SIGFPE, &act, nil);		if(signal(SIGINT, SIG_IGN) != SIG_IGN)			signal(SIGINT, cleanexit);	} else{		act.sa_sigaction = printILL;		act.sa_flags=SA_SIGINFO;		sigaction(SIGILL, &act, nil);	}	 	if(thr_keycreate(&prdakey,NULL))		print("keycreate failed\n"); 	Up = newproc();	if(thr_setspecific(prdakey,Up))		panic("set specific thread data failed\n"); 	pw = getpwuid(getuid());	if(pw != nil)		kstrdup(&eve, pw->pw_name);	else		print("cannot getpwuid\n"); 	up->env->uid = getuid();	up->env->gid = getgid();	emuinit(imod);} intreadkbd(void){	int n;	char buf[1]; 	n = read(0, buf, sizeof(buf));	if(n < 0)		fprint(2, "keyboard read: %s\n", strerror(errno));	if(n <= 0)		pexit("keyboard thread", 0); 	switch(buf[0]) {	case '\r':		buf[0] = '\n';		break;	case DELETE:		cleanexit(0);		break;	}	return buf[0];} /* * Return an abitrary millisecond clock time */longosmillisec(void){	static long sec0 = 0, usec0;	struct timeval t; 	if(gettimeofday(&t, NULL)<0)		return(0);	if(sec0==0){		sec0 = t.tv_sec;		usec0 = t.tv_usec;	}	return((t.tv_sec-sec0)*1000+(t.tv_usec-usec0+500)/1000);} /* * Return the time since the epoch in microseconds * The epoch is defined at 1 Jan 1970 */vlongosnsec(void){	struct timeval t; 	gettimeofday(&t, nil);	return (vlong)t.tv_sec*1000000000L + t.tv_usec*1000;} vlongosusectime(void){	struct timeval t; 	gettimeofday(&t, nil);	return (vlong)t.tv_sec * 1000000 + t.tv_usec;} intosmillisleep(ulong milsec){	struct  timespec time; 	time.tv_sec = milsec/1000;	time.tv_nsec= (milsec%1000)*1000000;	nanosleep(&time,nil);	return 0;} intlimbosleep(ulong milsec){	return osmillisleep(milsec);} voidosyield(void){	thr_yield();} voidospause(void){	for(;;)		pause();} voidoslopri(void){	setpriority(PRIO_PROCESS, 0, getpriority(PRIO_PROCESS,0)+4);}