ref: a411870ee4640241e3c494367d922847da84f972
dir: /emu/Unixware/os.c/
#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;
}
void
pexit(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);
}
void
kproc(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 void
trapUSR1(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 void
trapILL(void)
{
disfault(nil, "Illegal instruction");
}
static void
printILL(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 void
trapBUS(void)
{
disfault(nil, "Bus error");
}
static void
trapSEGV(void)
{
disfault(nil, "Segmentation violation");
}
static void
trapFPE(void)
{
disfault(nil, "Floating point exception");
}
void
oshostintr(Proc *p)
{
thr_kill(p->sigid, SIGUSR1);
}
void
osblock(void)
{
while(sema_wait(up->os))
; /* retry on signals */
}
void
osready(Proc *p)
{
sema_post(p->os);
}
void
oslongjmp(void *regs, osjmpbuf env, int val)
{
USED(regs);
siglongjmp(env, val);
}
static struct termios tinit;
static void
termset(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 void
termrestore(void)
{
tcsetattr(0, TCSANOW, &tinit);
}
void
cleanexit(int x)
{
USED(x);
if(up->intwait) {
up->intwait = 0;
return;
}
if(dflag == 0)
termrestore();
exit(0);
}
int gidnobody= -1, uidnobody= -1;
void
getnobody(void)
{
struct passwd *pwd;
if (pwd=getpwnam("nobody")) {
uidnobody = pwd->pw_uid;
gidnobody = pwd->pw_gid;
}
}
void
osreboot(char *file, char **argv)
{
if(dflag == 0)
termrestore();
execvp(file, argv);
panic("reboot failure");
}
void
libinit(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);
}
int
readkbd(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
*/
long
osmillisec(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
*/
vlong
osnsec(void)
{
struct timeval t;
gettimeofday(&t, nil);
return (vlong)t.tv_sec*1000000000L + t.tv_usec*1000;
}
vlong
osusectime(void)
{
struct timeval t;
gettimeofday(&t, nil);
return (vlong)t.tv_sec * 1000000 + t.tv_usec;
}
int
osmillisleep(ulong milsec)
{
struct timespec time;
time.tv_sec = milsec/1000;
time.tv_nsec= (milsec%1000)*1000000;
nanosleep(&time,nil);
return 0;
}
int
limbosleep(ulong milsec)
{
return osmillisleep(milsec);
}
void
osyield(void)
{
thr_yield();
}
void
ospause(void)
{
for(;;)
pause();
}
void
oslopri(void)
{
setpriority(PRIO_PROCESS, 0, getpriority(PRIO_PROCESS,0)+4);
}