ref: 249dc0489c7b24371e1f829e9c849fa7464f6c0c
dir: /emu/port/main.c/
#include "dat.h"
#include "fns.h"
#include "error.h"
#include "interp.h"
#include "kernel.h"
#include "draw.h"
#include "version.h"
int rebootargc = 0;
char** rebootargv;
static char *imod = "/dis/emuinit.dis";
extern char* hosttype;
char* tkfont; /* for libtk/utils.c */
int tkstylus; /* libinterp/tk.c */
extern int mflag;
int dflag;
int vflag;
int vflag;
Procs procs;
char *eve;
int Xsize = 640;
int Ysize = 480;
int bflag = 1;
int sflag;
int qflag;
int xtblbit;
ulong displaychan;
char *cputype;
static void
usage(void)
{
fprint(2, "Usage: emu [options...] [file.dis [args...]]\n"
"\t-gXxY\n"
"\t-c[0-9]\n"
"\t-d file.dis\n"
"\t-s\n"
"\t-v\n"
"\t-p<poolname>=maxsize\n"
"\t-f<fontpath>\n"
"\t-r<rootpath>\n"
"\t-7\n"
"\t-B\n"
"\t-C<channel string>\n"
"\t-S\n");
exits("usage");
}
static void
envusage(void)
{
fprint(2, "emu: bad option in EMU environment variable (%s)\n", getenv("EMU"));
usage();
}
static int
isnum(char *p)
{
if (*p == 0) return 0;
while (*p) {
if (*p < '0' || *p > '9') return 0;
p++;
}
return 1;
}
static int
geom(char *val)
{
char *p;
int x, y;
if (val == '\0' || (*val < '0' || *val > '9'))
return 0;
x = strtoul(val, &p, 0);
if(x >= 64)
Xsize = x;
if (*p++ != 'x' || !isnum(p))
return 0;
y = strtoul(p, &p, 0);
if(y >= 48)
Ysize = y;
if (*p != '\0') return 0;
return 1;
}
static void
poolopt(char *str)
{
char *var;
int n;
ulong x;
var = str;
while(*str && *str != '=')
str++;
if(*str != '=' || str[1] == '\0')
usage();
*str++ = '\0';
n = strlen(str);
x = atoi(str);
switch(str[n - 1]){
case 'k':
case 'K':
x *= 1024;
break;
case 'm':
case 'M':
x *= 1024*1024;
break;
}
if(poolsetsize(var, x) == 0)
usage();
}
static void
option(int argc, char *argv[], void (*badusage)(void))
{
char *cp;
ARGBEGIN {
default:
badusage();
case 'g': /* Window geometry */
if (geom(EARGF(badusage())) == 0)
badusage();
break;
case 'b': /* jit array bounds checking (obsolete, now on by default) */
break;
case 'B': /* suppress jit array bounds checks */
bflag = 0;
break;
case 'c': /* Compile on the fly */
cp = EARGF(badusage());
if (!isnum(cp))
badusage();
cflag = atoi(cp);
if(cflag < 0|| cflag > 9)
usage();
break;
case 'I': /* (temporary option) run without cons */
dflag++;
break;
case 'd': /* run as a daemon */
dflag++;
imod = EARGF(badusage());
break;
case 's': /* No trap handling */
sflag++;
break;
case 'm': /* gc mark and sweep */
cp = EARGF(badusage());
if (!isnum(cp))
badusage();
mflag = atoi(cp);
if(mflag < 0|| mflag > 9)
usage();
break;
case 'p': /* pool option */
poolopt(EARGF(badusage()));
break;
case 'f': /* Set font path */
tkfont = EARGF(badusage());
break;
case 'r': /* Set inferno root */
strecpy(rootdir, rootdir+sizeof(rootdir), EARGF(badusage()));
break;
case '7': /* use 7 bit colormap in X */
xtblbit = 1;
break;
case 'G': /* allow global access to file system (obsolete) */
break;
case 'C': /* channel specification for display */
cp = EARGF(badusage());
displaychan = strtochan(cp);
if(displaychan == 0){
fprint(2, "emu: invalid channel specifier (-C): %q\n", cp);
exits("usage");
}
break;
case 'S':
tkstylus = 1;
break;
case 'v':
vflag = 1; /* print startup messages */
break;
} ARGEND
}
static void
savestartup(int argc, char *argv[])
{
int i;
rebootargc = argc;
rebootargv = malloc((argc+1)*sizeof(char*));
if(rebootargv == nil)
panic("can't save startup args");
for(i = 0; i < argc; i++) {
rebootargv[i] = strdup(argv[i]);
if(rebootargv[i] == nil)
panic("can't save startup args");
}
rebootargv[i] = nil;
}
void
putenvq(char *name, char *val, int conf)
{
val = smprint("%q", val);
ksetenv(name, val, conf);
free(val);
}
void
putenvqv(char *name, char **v, int n, int conf)
{
Fmt f;
int i;
char *val;
fmtstrinit(&f);
for(i=0; i<n; i++)
fmtprint(&f, "%s%q", i?" ":"", v[i]);
val = fmtstrflush(&f);
ksetenv(name, val, conf);
free(val);
}
void
nofence(void)
{
}
void
main(int argc, char *argv[])
{
char *opt, *p;
char *enva[20];
int envc;
if(coherence == nil)
coherence = nofence;
quotefmtinstall();
savestartup(argc, argv);
/* set default root now, so either $EMU or -r can override it later */
if((p = getenv("INFERNO")) != nil || (p = getenv("ROOT")) != nil)
strecpy(rootdir, rootdir+sizeof(rootdir), p);
opt = getenv("EMU");
if(opt != nil && *opt != '\0') {
enva[0] = "emu";
envc = tokenize(opt, &enva[1], sizeof(enva)-1) + 1;
enva[envc] = 0;
option(envc, enva, envusage);
}
option(argc, argv, usage);
eve = strdup("inferno");
opt = "interp";
if(cflag)
opt = "compile";
if(vflag)
print("Inferno %s main (pid=%d) %s\n", VERSION, getpid(), opt);
libinit(imod);
}
void
emuinit(void *imod)
{
Osenv *e;
char *wdir;
e = up->env;
e->pgrp = newpgrp();
e->fgrp = newfgrp(nil);
e->egrp = newegrp();
e->errstr = e->errbuf0;
e->syserrstr = e->errbuf1;
e->user = strdup("");
links();
chandevinit();
if(waserror())
panic("setting root and dot");
e->pgrp->slash = namec("#/", Atodir, 0, 0);
cnameclose(e->pgrp->slash->name);
e->pgrp->slash->name = newcname("/");
e->pgrp->dot = cclone(e->pgrp->slash);
poperror();
strcpy(up->text, "main");
if(kopen("#c/cons", OREAD) != 0)
fprint(2, "failed to make fd0 from #c/cons: %r\n");
kopen("#c/cons", OWRITE);
kopen("#c/cons", OWRITE);
/* the setid cannot precede the bind of #U */
kbind("#U", "/", MAFTER|MCREATE);
setid(eve, 0);
kbind("#^", "/dev", MBEFORE); /* snarf */
kbind("#^", "/chan", MBEFORE);
kbind("#m", "/dev", MBEFORE); /* pointer */
kbind("#c", "/dev", MBEFORE);
kbind("#p", "/prog", MREPL);
kbind("#d", "/fd", MREPL);
kbind("#I", "/net", MAFTER); /* will fail on Plan 9 */
/* BUG: we actually only need to do these on Plan 9 */
kbind("#U/dev", "/dev", MAFTER);
kbind("#U/net", "/net", MAFTER);
kbind("#U/net.alt", "/net.alt", MAFTER);
if(cputype != nil)
ksetenv("cputype", cputype, 1);
putenvqv("emuargs", rebootargv, rebootargc, 1);
putenvq("emuroot", rootdir, 1);
ksetenv("emuhost", hosttype, 1);
wdir = malloc(1024);
if(wdir != nil){
if(getwd(wdir, 1024) != nil)
putenvq("emuwdir", wdir, 1);
free(wdir);
}
kproc("main", disinit, imod, KPDUPFDG|KPDUPPG|KPDUPENVG);
for(;;)
ospause();
}
void
errorf(char *fmt, ...)
{
va_list arg;
char buf[PRINTSIZE];
va_start(arg, fmt);
vseprint(buf, buf+sizeof(buf), fmt, arg);
va_end(arg);
error(buf);
}
void
error(char *err)
{
if(err != up->env->errstr && up->env->errstr != nil)
kstrcpy(up->env->errstr, err, ERRMAX);
// ossetjmp(up->estack[NERR-1]);
nexterror();
}
void
exhausted(char *resource)
{
char buf[64];
int n;
n = snprint(buf, sizeof(buf), "no free %s\n", resource);
iprint(buf);
buf[n-1] = 0;
error(buf);
}
void
nexterror(void)
{
oslongjmp(nil, up->estack[--up->nerr], 1);
}
/* for dynamic modules - functions not macros */
void*
waserr(void)
{
up->nerr++;
return up->estack[up->nerr-1];
}
void
poperr(void)
{
up->nerr--;
}
char*
enverror(void)
{
return up->env->errstr;
}
void
panic(char *fmt, ...)
{
va_list arg;
char buf[512];
va_start(arg, fmt);
vseprint(buf, buf+sizeof(buf), fmt, arg);
va_end(arg);
fprint(2, "panic: %s\n", buf);
if(sflag)
abort();
cleanexit(0);
}
int
iprint(char *fmt, ...)
{
int n;
va_list va;
char buf[1024];
va_start(va, fmt);
n = vseprint(buf, buf+sizeof buf, fmt, va) - buf;
va_end(va);
write(1, buf, n);
return 1;
}
void
_assert(char *fmt)
{
panic("assert failed: %s", fmt);
}
/*
* mainly for libmp
*/
void
sysfatal(char *fmt, ...)
{
va_list arg;
char buf[64];
va_start(arg, fmt);
vsnprint(buf, sizeof(buf), fmt, arg);
va_end(arg);
error(buf);
}
void
oserror(void)
{
oserrstr(up->env->errstr, ERRMAX);
error(up->env->errstr);
}