1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rhdisp.c,v 3.45 2003/05/13 17:58:33 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Holodeck display process. |
6 |
*/ |
7 |
|
8 |
#include "rholo.h" |
9 |
#include "rhdisp.h" |
10 |
#include "rhdriver.h" |
11 |
#include "selcall.h" |
12 |
#include <ctype.h> |
13 |
|
14 |
#ifndef VIEWHISTLEN |
15 |
#define VIEWHISTLEN 4 /* number of remembered views */ |
16 |
#endif |
17 |
|
18 |
#ifndef FSIZDEF |
19 |
#define FSIZDEF 0.125 /* default focus frame size */ |
20 |
#endif |
21 |
|
22 |
#if defined(freebsd) |
23 |
#define fbufcnt(f) ((f)->_r) |
24 |
#elif defined(__GNUC__) |
25 |
#define fbufcnt(f) ((f)->_IO_read_end - (f)->_IO_read_ptr) |
26 |
#else |
27 |
#define fbufcnt(f) ((f)->_cnt) |
28 |
#endif |
29 |
|
30 |
HOLO *hdlist[HDMAX+1]; /* global holodeck list */ |
31 |
|
32 |
char *hdgfn[HDMAX]; /* holodeck section geometry list */ |
33 |
char *hdpfn[HDMAX]; /* section portal list */ |
34 |
|
35 |
char cmdlist[DC_NCMDS][8] = DC_INIT; |
36 |
|
37 |
int imm_mode = 0; /* bundles are being delivered immediately */ |
38 |
|
39 |
int do_outside = 0; /* render from outside sections */ |
40 |
|
41 |
double eyesepdist = 1; /* eye separation distance */ |
42 |
|
43 |
char *progname; /* global argv[0] */ |
44 |
|
45 |
FILE *sstdin, *sstdout; /* server's standard input and output */ |
46 |
|
47 |
#ifdef DEBUG |
48 |
extern time_t time(); |
49 |
static time_t tmodesw; |
50 |
static time_t timm, tadd; |
51 |
static long nimmrays, naddrays; |
52 |
#endif |
53 |
|
54 |
#define RDY_SRV 01 |
55 |
#define RDY_DEV 02 |
56 |
#define RDY_SIN 04 |
57 |
|
58 |
|
59 |
main(argc, argv) |
60 |
int argc; |
61 |
char *argv[]; |
62 |
{ |
63 |
int rdy, inp, res = 0, pause = 0; |
64 |
|
65 |
progname = argv[0]; |
66 |
if (argc < 3) |
67 |
error(USER, "bad command line arguments"); |
68 |
/* open our device */ |
69 |
dev_open(argv[1]); |
70 |
/* open server process i/o */ |
71 |
sstdout = fdopen(atoi(argv[2]), "w"); |
72 |
if (argc < 4 || (inp = atoi(argv[3])) < 0) |
73 |
sstdin = NULL; |
74 |
else |
75 |
sstdin = fdopen(inp, "r"); |
76 |
/* set command error vector */ |
77 |
erract[COMMAND].pf = eputs; |
78 |
#ifdef DEBUG |
79 |
tmodesw = time(NULL); |
80 |
#endif |
81 |
/* enter main loop */ |
82 |
do { |
83 |
rdy = disp_wait(); |
84 |
if (rdy & RDY_SRV) { /* process server result */ |
85 |
res = serv_result(); |
86 |
if (pause && res != DS_SHUTDOWN) { |
87 |
serv_request(DR_ATTEN, 0, NULL); |
88 |
while ((res = serv_result()) != DS_ACKNOW && |
89 |
res != DS_SHUTDOWN) |
90 |
; |
91 |
} |
92 |
} |
93 |
if (rdy & RDY_DEV) { /* user input from driver */ |
94 |
inp = dev_input(); |
95 |
if (inp & DFL(DC_SETVIEW)) |
96 |
new_view(&odev.v); |
97 |
else if (inp & DFL(DC_LASTVIEW)) |
98 |
new_view(NULL); |
99 |
if (inp & DFL(DC_REDRAW)) |
100 |
imm_mode = beam_sync(1) > 0; |
101 |
if (inp & DFL(DC_GETVIEW)) |
102 |
printview(); |
103 |
if (inp & DFL(DC_FOCUS)) |
104 |
set_focus(odev_args); |
105 |
if (inp & DFL(DC_KILL)) { |
106 |
serv_request(DR_KILL, 0, NULL); |
107 |
pause = 0; |
108 |
} |
109 |
if (inp & DFL(DC_CLOBBER)) |
110 |
serv_request(DR_CLOBBER, 0, NULL); |
111 |
if (inp & DFL(DC_RESTART)) { |
112 |
serv_request(DR_RESTART, 0, NULL); |
113 |
pause = 0; |
114 |
} |
115 |
if (inp & DFL(DC_RESUME)) { |
116 |
serv_request(DR_NOOP, 0, NULL); |
117 |
pause = 0; |
118 |
} |
119 |
if (inp & DFL(DC_PAUSE)) |
120 |
pause = 1; |
121 |
if (inp & DFL(DC_QUIT)) |
122 |
serv_request(DR_SHUTDOWN, 0, NULL); |
123 |
} |
124 |
if (rdy & RDY_SIN && !imm_mode) /* user input from sstdin */ |
125 |
switch (usr_input()) { |
126 |
case DC_PAUSE: |
127 |
pause = 1; |
128 |
break; |
129 |
case DC_RESUME: |
130 |
serv_request(DR_NOOP, 0, NULL); |
131 |
/* fall through */ |
132 |
case DC_KILL: |
133 |
case DC_RESTART: |
134 |
pause = 0; |
135 |
break; |
136 |
} |
137 |
} while (res != DS_SHUTDOWN); |
138 |
#ifdef DEBUG |
139 |
if (timm && nimmrays) |
140 |
fprintf(stderr, |
141 |
"%s: %.1f rays recalled/second (%ld rays total)\n", |
142 |
progname, (double)nimmrays/timm, nimmrays); |
143 |
if (tadd && naddrays) |
144 |
fprintf(stderr, |
145 |
"%s: %.1f rays calculated/second (%ld rays total)\n", |
146 |
progname, (double)naddrays/tadd, naddrays); |
147 |
#endif |
148 |
/* all done */ |
149 |
quit(0); |
150 |
} |
151 |
|
152 |
|
153 |
int |
154 |
disp_wait() /* wait for more input */ |
155 |
{ |
156 |
fd_set readset, errset; |
157 |
int flgs; |
158 |
int n; |
159 |
register int i; |
160 |
/* see if we can avoid select call */ |
161 |
if (hdlist[0] == NULL) |
162 |
return(RDY_SRV); /* initialize first */ |
163 |
flgs = 0; /* flag what's ready already */ |
164 |
if (imm_mode || fbufcnt(stdin) > 0) |
165 |
flgs |= RDY_SRV; |
166 |
if (sstdin != NULL && fbufcnt(sstdin) > 0) |
167 |
flgs |= RDY_SIN; |
168 |
if (odev.inpready) |
169 |
flgs |= RDY_DEV; |
170 |
if (flgs) /* got something? */ |
171 |
return(flgs); |
172 |
if (dev_flush()) /* else flush output & check keyboard+mouse */ |
173 |
return(RDY_DEV); |
174 |
/* if nothing, we need to call select */ |
175 |
FD_ZERO(&readset); FD_ZERO(&errset); |
176 |
FD_SET(0, &readset); |
177 |
FD_SET(0, &errset); |
178 |
FD_SET(odev.ifd, &readset); |
179 |
FD_SET(odev.ifd, &errset); |
180 |
n = odev.ifd+1; |
181 |
if (sstdin != NULL) { |
182 |
FD_SET(fileno(sstdin), &readset); |
183 |
FD_SET(fileno(sstdin), &errset); |
184 |
if (fileno(sstdin) >= n) |
185 |
n = fileno(sstdin) + 1; |
186 |
} |
187 |
n = select(n, &readset, NULL, &errset, NULL); |
188 |
if (n < 0) { |
189 |
if (errno == EINTR) |
190 |
return(0); |
191 |
error(SYSTEM, "select call failure in disp_wait"); |
192 |
} |
193 |
if (FD_ISSET(0, &readset) || FD_ISSET(0, &errset)) |
194 |
flgs |= RDY_SRV; |
195 |
if (FD_ISSET(odev.ifd, &readset) || FD_ISSET(odev.ifd, &errset)) |
196 |
flgs |= RDY_DEV; |
197 |
if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) || |
198 |
FD_ISSET(fileno(sstdin), &errset))) |
199 |
flgs |= RDY_SIN; |
200 |
return(flgs); |
201 |
} |
202 |
|
203 |
|
204 |
add_holo(hdg, gfn, pfn) /* register a new holodeck section */ |
205 |
HDGRID *hdg; |
206 |
char *gfn, *pfn; |
207 |
{ |
208 |
VIEW nv; |
209 |
double d; |
210 |
register int hd; |
211 |
|
212 |
for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++) |
213 |
; |
214 |
if (hd >= HDMAX) |
215 |
error(INTERNAL, "too many holodeck sections in add_holo"); |
216 |
hdlist[hd] = (HOLO *)malloc(sizeof(HOLO)); |
217 |
if (hdlist[hd] == NULL) |
218 |
error(SYSTEM, "out of memory in add_holo"); |
219 |
bcopy((void *)hdg, (void *)hdlist[hd], sizeof(HDGRID)); |
220 |
hdcompgrid(hdlist[hd]); |
221 |
hdgfn[hd] = savestr(gfn); |
222 |
hdpfn[hd] = pfn && *pfn ? savestr(pfn) : (char *)NULL; |
223 |
if (hd) |
224 |
return; |
225 |
/* set initial viewpoint */ |
226 |
copystruct(&nv, &odev.v); |
227 |
VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5); |
228 |
VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5); |
229 |
VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5); |
230 |
fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]); |
231 |
VCOPY(nv.vup, hdlist[0]->xv[2]); |
232 |
if (do_outside) { |
233 |
normalize(nv.vdir); |
234 |
d = VLEN(hdlist[0]->xv[1]); |
235 |
d += VLEN(hdlist[0]->xv[2]); |
236 |
VSUM(nv.vp, nv.vp, nv.vdir, -d); |
237 |
} |
238 |
new_view(&nv); |
239 |
} |
240 |
|
241 |
|
242 |
disp_bundle(p) /* display a ray bundle */ |
243 |
register PACKHEAD *p; |
244 |
{ |
245 |
GCOORD gc[2]; |
246 |
FVECT ro, rd, wp; |
247 |
double d; |
248 |
register int i; |
249 |
/* get beam coordinates */ |
250 |
if (p->hd < 0 | p->hd >= HDMAX || hdlist[p->hd] == NULL) |
251 |
error(INTERNAL, "bad holodeck number in disp_bundle"); |
252 |
if (!hdbcoord(gc, hdlist[p->hd], p->bi)) |
253 |
error(INTERNAL, "bad beam index in disp_bundle"); |
254 |
/* display each ray */ |
255 |
for (i = p->nr; i--; ) { |
256 |
hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r); |
257 |
d = hddepth(hdlist[p->hd], packra(p)[i].d); |
258 |
if (d < .99*FHUGE) { |
259 |
VSUM(wp, ro, rd, d); /* might be behind viewpoint */ |
260 |
dev_value(packra(p)[i].v, rd, wp); |
261 |
} else |
262 |
dev_value(packra(p)[i].v, rd, NULL); |
263 |
} |
264 |
#ifdef DEBUG |
265 |
if (imm_mode) nimmrays += p->nr; |
266 |
else naddrays += p->nr; |
267 |
#endif |
268 |
} |
269 |
|
270 |
|
271 |
new_view(v) /* change view parameters */ |
272 |
register VIEW *v; |
273 |
{ |
274 |
static VIEW viewhist[VIEWHISTLEN]; |
275 |
static unsigned nhist; |
276 |
VIEW *dv; |
277 |
int i, res[2]; |
278 |
int16 *slist; |
279 |
char *err; |
280 |
/* restore previous view? */ |
281 |
if (v == NULL) { |
282 |
if (nhist > 1) /* get one before last setting */ |
283 |
nhist--; |
284 |
else /* else go to end of list */ |
285 |
while (nhist < VIEWHISTLEN && viewhist[nhist].type) |
286 |
nhist++; |
287 |
v = viewhist + ((nhist-1)%VIEWHISTLEN); |
288 |
} else |
289 |
again: |
290 |
if ((err = setview(v)) != NULL) { |
291 |
error(COMMAND, err); |
292 |
return; |
293 |
} |
294 |
if (!dev_view(v)) /* notify display driver */ |
295 |
goto again; |
296 |
if (v->type == VT_PAR) { |
297 |
error(COMMAND, "cannot handle parallel views"); |
298 |
return; |
299 |
} |
300 |
beam_init(odev.firstuse); /* compute new beam set */ |
301 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) { |
302 |
if ((slist = beam_view(dv, res[0], res[1])) == NULL) { |
303 |
if (!nhist) { |
304 |
error(COMMAND, "invalid starting view"); |
305 |
return; |
306 |
} |
307 |
copystruct(v, viewhist + ((nhist-1)%VIEWHISTLEN)); |
308 |
goto again; /* poss. overloading dev_section()? */ |
309 |
} |
310 |
DCHECK(*slist < 0, WARNING, "no visible sections in new_view"); |
311 |
for ( ; *slist >= 0; slist++) |
312 |
dev_section(hdgfn[*slist], hdpfn[*slist]); |
313 |
} |
314 |
dev_section(NULL,NULL); /* end section list */ |
315 |
dev_flush(); /* update display */ |
316 |
/* update server */ |
317 |
imm_mode = beam_sync(odev.firstuse) > 0; |
318 |
/* record new view */ |
319 |
if (v < viewhist || v >= viewhist+VIEWHISTLEN) { |
320 |
copystruct(viewhist + (nhist%VIEWHISTLEN), v); |
321 |
nhist++; |
322 |
} |
323 |
} |
324 |
|
325 |
|
326 |
set_focus(args) /* set focus frame */ |
327 |
char *args; |
328 |
{ |
329 |
double hcent, vcent, hsiz, vsiz; |
330 |
VIEW *dv, vwfocus; |
331 |
int i, res[2]; |
332 |
|
333 |
i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz); |
334 |
if (i < 2 || hcent < 0 || hcent > 1 || vcent < 0 || vcent > 1) { |
335 |
beam_init(0); /* restore view */ |
336 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
337 |
beam_view(dv, res[0], res[1]); |
338 |
beam_sync(0); /* update server */ |
339 |
return; |
340 |
} |
341 |
if (i < 4 || hsiz <= hcent || hsiz > 1 || vsiz <= vcent || vsiz > 1) |
342 |
hsiz = vsiz = FSIZDEF; /* gave center only */ |
343 |
else { |
344 |
hsiz -= hcent; hcent += 0.5*hsiz; /* gave min and max */ |
345 |
vsiz -= vcent; vcent += 0.5*vsiz; |
346 |
} |
347 |
beam_init(0); /* add basic views */ |
348 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
349 |
beam_view(dv, res[0]>>4, res[1]>>4); |
350 |
copystruct(&vwfocus, &odev.v); /* add focus view */ |
351 |
switch (odev.v.type) { |
352 |
case VT_PER: |
353 |
vwfocus.horiz = 2.*180./PI*atan( |
354 |
hsiz * tan(PI/180./2.*odev.v.horiz) ); |
355 |
vwfocus.vert = 2.*180./PI*atan( |
356 |
vsiz * tan(PI/180./2.*odev.v.vert) ); |
357 |
break; |
358 |
case VT_PAR: |
359 |
case VT_ANG: |
360 |
vwfocus.horiz = hsiz * odev.v.horiz; |
361 |
vwfocus.vert = vsiz * odev.v.vert; |
362 |
break; |
363 |
case VT_HEM: |
364 |
vwfocus.horiz = 2.*180./PI*asin( |
365 |
hsiz * sin(PI/180./2.*odev.v.horiz) ); |
366 |
vwfocus.vert = 2.*180./PI*asin( |
367 |
vsiz * sin(PI/180./2.*odev.v.vert) ); |
368 |
break; |
369 |
case VT_CYL: |
370 |
vwfocus.horiz = hsiz * odev.v.horiz; |
371 |
vwfocus.vert = 2.*180./PI*atan( |
372 |
vsiz * tan(PI/180./2.*odev.v.vert) ); |
373 |
break; |
374 |
default: |
375 |
error(INTERNAL, "bad view type in set_focus"); |
376 |
} |
377 |
vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz; |
378 |
vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz; |
379 |
setview(&vwfocus); |
380 |
beam_view(&vwfocus, (int)(3*odev.hres*hsiz)+100, |
381 |
(int)(3*odev.vres*vsiz)+100); |
382 |
beam_sync(0); /* update server */ |
383 |
} |
384 |
|
385 |
|
386 |
int |
387 |
usr_input() /* get user input and process it */ |
388 |
{ |
389 |
VIEW vparams; |
390 |
char cmd[256]; |
391 |
register char *args; |
392 |
register int i; |
393 |
|
394 |
if (fgets(cmd, sizeof(cmd), sstdin) == NULL) { |
395 |
fclose(sstdin); |
396 |
sstdin = NULL; |
397 |
return(-1); |
398 |
} |
399 |
if (*cmd == '\n') |
400 |
return(DC_RESUME); |
401 |
for (args = cmd; *args && !isspace(*args); args++) |
402 |
; |
403 |
while (isspace(*args)) |
404 |
*args++ = '\0'; |
405 |
if (*args && args[i=strlen(args)-1] == '\n') |
406 |
args[i] = '\0'; |
407 |
for (i = 0; i < DC_NCMDS; i++) |
408 |
if (!strcmp(cmd, cmdlist[i])) |
409 |
break; |
410 |
if (i >= DC_NCMDS) { |
411 |
dev_auxcom(cmd, args); |
412 |
return(-1); |
413 |
} |
414 |
switch (i) { |
415 |
case DC_SETVIEW: /* set the view */ |
416 |
copystruct(&vparams, &odev.v); |
417 |
if (!sscanview(&vparams, args)) |
418 |
error(COMMAND, "missing view options"); |
419 |
else |
420 |
new_view(&vparams); |
421 |
break; |
422 |
case DC_GETVIEW: /* print the current view */ |
423 |
printview(); |
424 |
break; |
425 |
case DC_LASTVIEW: /* restore previous view */ |
426 |
new_view(NULL); |
427 |
break; |
428 |
case DC_FOCUS: /* set focus frame */ |
429 |
set_focus(args); |
430 |
break; |
431 |
case DC_PAUSE: /* pause the current calculation */ |
432 |
case DC_RESUME: /* resume the calculation */ |
433 |
/* handled in main() */ |
434 |
break; |
435 |
case DC_REDRAW: /* redraw from server */ |
436 |
imm_mode = beam_sync(1) > 0; |
437 |
dev_clear(); |
438 |
break; |
439 |
case DC_KILL: /* kill rtrace process(es) */ |
440 |
serv_request(DR_KILL, 0, NULL); |
441 |
break; |
442 |
case DC_CLOBBER: /* clobber holodeck */ |
443 |
serv_request(DR_CLOBBER, 0, NULL); |
444 |
break; |
445 |
case DC_RESTART: /* restart rtrace */ |
446 |
serv_request(DR_RESTART, 0, NULL); |
447 |
break; |
448 |
case DC_QUIT: /* quit request */ |
449 |
serv_request(DR_SHUTDOWN, 0, NULL); |
450 |
break; |
451 |
default: |
452 |
error(CONSISTENCY, "bad command id in usr_input"); |
453 |
} |
454 |
return(i); |
455 |
} |
456 |
|
457 |
|
458 |
printview() /* print our current view to server stdout */ |
459 |
{ |
460 |
fputs(VIEWSTR, sstdout); |
461 |
fprintview(&odev.v, sstdout); |
462 |
fputc('\n', sstdout); |
463 |
fflush(sstdout); |
464 |
} |
465 |
|
466 |
|
467 |
int |
468 |
serv_result() /* get next server result and process it */ |
469 |
{ |
470 |
static char *buf = NULL; |
471 |
static int bufsiz = 0; |
472 |
MSGHEAD msg; |
473 |
int n; |
474 |
/* read message header */ |
475 |
if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1) |
476 |
goto readerr; |
477 |
if (msg.nbytes > 0) { /* get the message body */ |
478 |
if (msg.nbytes > bufsiz) { |
479 |
if (buf == NULL) |
480 |
buf = (char *)malloc(bufsiz=msg.nbytes); |
481 |
else |
482 |
buf = (char *)realloc((void *)buf, |
483 |
bufsiz=msg.nbytes); |
484 |
if (buf == NULL) |
485 |
error(SYSTEM, "out of memory in serv_result"); |
486 |
} |
487 |
if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes) |
488 |
goto readerr; |
489 |
} |
490 |
switch (msg.type) { /* process results */ |
491 |
case DS_BUNDLE: |
492 |
if (msg.nbytes < sizeof(PACKHEAD) || |
493 |
msg.nbytes != packsiz(((PACKHEAD *)buf)->nr)) |
494 |
error(INTERNAL, "bad display packet from server"); |
495 |
disp_bundle((PACKHEAD *)buf); |
496 |
break; |
497 |
case DS_ADDHOLO: |
498 |
if (msg.nbytes < sizeof(HDGRID)+2) |
499 |
error(INTERNAL, "bad holodeck record from server"); |
500 |
add_holo((HDGRID *)buf, buf+sizeof(HDGRID), |
501 |
buf+sizeof(HDGRID)+strlen(buf+sizeof(HDGRID))+1); |
502 |
break; |
503 |
case DS_OUTSECT: |
504 |
do_outside = 1; |
505 |
goto noargs; |
506 |
case DS_EYESEP: |
507 |
if (msg.nbytes <= 1 || (eyesepdist = atof(buf)) <= FTINY) |
508 |
error(INTERNAL, "bad eye separation from server"); |
509 |
break; |
510 |
case DS_STARTIMM: |
511 |
case DS_ENDIMM: |
512 |
if (!(imm_mode = msg.type==DS_STARTIMM)) |
513 |
dev_flush(); |
514 |
#ifdef DEBUG |
515 |
{ |
516 |
time_t tnow = time(NULL); |
517 |
if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw; |
518 |
else timm += tnow - tmodesw; |
519 |
tmodesw = tnow; |
520 |
} |
521 |
#endif |
522 |
goto noargs; |
523 |
case DS_ACKNOW: |
524 |
case DS_SHUTDOWN: |
525 |
goto noargs; |
526 |
default: |
527 |
error(INTERNAL, "unrecognized result from server process"); |
528 |
} |
529 |
return(msg.type); /* return message type */ |
530 |
noargs: |
531 |
if (msg.nbytes) { |
532 |
sprintf(errmsg, "unexpected body with server message %d", |
533 |
msg.type); |
534 |
error(INTERNAL, errmsg); |
535 |
} |
536 |
return(msg.type); |
537 |
readerr: |
538 |
if (feof(stdin)) |
539 |
error(SYSTEM, "server process died"); |
540 |
error(SYSTEM, "error reading from server process"); |
541 |
} |
542 |
|
543 |
|
544 |
serv_request(type, nbytes, p) /* send a request to the server process */ |
545 |
int type, nbytes; |
546 |
char *p; |
547 |
{ |
548 |
MSGHEAD msg; |
549 |
int m; |
550 |
/* consistency checks */ |
551 |
DCHECK(nbytes < 0 || nbytes > 0 & p == NULL, |
552 |
CONSISTENCY, "bad buffer handed to serv_request"); |
553 |
/* get server's attention for big request */ |
554 |
if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) { |
555 |
serv_request(DR_ATTEN, 0, NULL); |
556 |
while ((m = serv_result()) != DS_ACKNOW) |
557 |
if (m == DS_SHUTDOWN) /* the bugger quit on us */ |
558 |
quit(0); |
559 |
} |
560 |
msg.type = type; /* write and flush the message */ |
561 |
msg.nbytes = nbytes; |
562 |
fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout); |
563 |
if (nbytes > 0) |
564 |
fwrite(p, 1, nbytes, stdout); |
565 |
if (fflush(stdout) < 0) |
566 |
error(SYSTEM, "write error in serv_request"); |
567 |
} |
568 |
|
569 |
|
570 |
void |
571 |
eputs(s) /* put error message to stderr */ |
572 |
register char *s; |
573 |
{ |
574 |
static int midline = 0; |
575 |
|
576 |
if (!*s) |
577 |
return; |
578 |
if (!midline++) { /* prepend line with program name */ |
579 |
fputs(progname, stderr); |
580 |
fputs(": ", stderr); |
581 |
} |
582 |
fputs(s, stderr); |
583 |
if (s[strlen(s)-1] == '\n') { |
584 |
fflush(stderr); |
585 |
midline = 0; |
586 |
} |
587 |
} |
588 |
|
589 |
|
590 |
void |
591 |
quit(code) /* clean up and exit */ |
592 |
int code; |
593 |
{ |
594 |
if (code) |
595 |
exit(code); |
596 |
if (odev.v.type) |
597 |
dev_close(); |
598 |
exit(0); |
599 |
} |