1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rhdisp.c,v 3.48 2003/07/21 22:30:18 schorsch Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Holodeck display process. |
6 |
*/ |
7 |
|
8 |
#include <string.h> |
9 |
#include <ctype.h> |
10 |
|
11 |
#include "rholo.h" |
12 |
#include "rhdisp.h" |
13 |
#include "rhdriver.h" |
14 |
#include "selcall.h" |
15 |
|
16 |
#ifndef VIEWHISTLEN |
17 |
#define VIEWHISTLEN 4 /* number of remembered views */ |
18 |
#endif |
19 |
|
20 |
#ifndef FSIZDEF |
21 |
#define FSIZDEF 0.125 /* default focus frame size */ |
22 |
#endif |
23 |
|
24 |
#if defined(freebsd) |
25 |
#define fbufcnt(f) ((f)->_r) |
26 |
#elif defined(__GNUC__) |
27 |
#define fbufcnt(f) ((f)->_IO_read_end - (f)->_IO_read_ptr) |
28 |
#else |
29 |
#define fbufcnt(f) ((f)->_cnt) |
30 |
#endif |
31 |
|
32 |
HOLO *hdlist[HDMAX+1]; /* global holodeck list */ |
33 |
|
34 |
char *hdgfn[HDMAX]; /* holodeck section geometry list */ |
35 |
char *hdpfn[HDMAX]; /* section portal list */ |
36 |
|
37 |
char cmdlist[DC_NCMDS][8] = DC_INIT; |
38 |
|
39 |
int imm_mode = 0; /* bundles are being delivered immediately */ |
40 |
|
41 |
int do_outside = 0; /* render from outside sections */ |
42 |
|
43 |
double eyesepdist = 1; /* eye separation distance */ |
44 |
|
45 |
char *progname; /* global argv[0] */ |
46 |
|
47 |
FILE *sstdin, *sstdout; /* server's standard input and output */ |
48 |
|
49 |
#ifdef DEBUG |
50 |
extern time_t time(); |
51 |
static time_t tmodesw; |
52 |
static time_t timm, tadd; |
53 |
static long nimmrays, naddrays; |
54 |
#endif |
55 |
|
56 |
#define RDY_SRV 01 |
57 |
#define RDY_DEV 02 |
58 |
#define RDY_SIN 04 |
59 |
|
60 |
|
61 |
main(argc, argv) |
62 |
int argc; |
63 |
char *argv[]; |
64 |
{ |
65 |
int rdy, inp, res = 0, pause = 0; |
66 |
|
67 |
progname = argv[0]; |
68 |
if (argc < 3) |
69 |
error(USER, "bad command line arguments"); |
70 |
/* open our device */ |
71 |
dev_open(argv[1]); |
72 |
/* open server process i/o */ |
73 |
sstdout = fdopen(atoi(argv[2]), "w"); |
74 |
if (argc < 4 || (inp = atoi(argv[3])) < 0) |
75 |
sstdin = NULL; |
76 |
else |
77 |
sstdin = fdopen(inp, "r"); |
78 |
/* set command error vector */ |
79 |
erract[COMMAND].pf = eputs; |
80 |
#ifdef DEBUG |
81 |
tmodesw = time(NULL); |
82 |
#endif |
83 |
/* enter main loop */ |
84 |
do { |
85 |
rdy = disp_wait(); |
86 |
if (rdy & RDY_SRV) { /* process server result */ |
87 |
res = serv_result(); |
88 |
if (pause && res != DS_SHUTDOWN) { |
89 |
serv_request(DR_ATTEN, 0, NULL); |
90 |
while ((res = serv_result()) != DS_ACKNOW && |
91 |
res != DS_SHUTDOWN) |
92 |
; |
93 |
} |
94 |
} |
95 |
if (rdy & RDY_DEV) { /* user input from driver */ |
96 |
inp = dev_input(); |
97 |
if (inp & DFL(DC_SETVIEW)) |
98 |
new_view(&odev.v); |
99 |
else if (inp & DFL(DC_LASTVIEW)) |
100 |
new_view(NULL); |
101 |
if (inp & DFL(DC_REDRAW)) |
102 |
imm_mode = beam_sync(1) > 0; |
103 |
if (inp & DFL(DC_GETVIEW)) |
104 |
printview(); |
105 |
if (inp & DFL(DC_FOCUS)) |
106 |
set_focus(odev_args); |
107 |
if (inp & DFL(DC_KILL)) { |
108 |
serv_request(DR_KILL, 0, NULL); |
109 |
pause = 0; |
110 |
} |
111 |
if (inp & DFL(DC_CLOBBER)) |
112 |
serv_request(DR_CLOBBER, 0, NULL); |
113 |
if (inp & DFL(DC_RESTART)) { |
114 |
serv_request(DR_RESTART, 0, NULL); |
115 |
pause = 0; |
116 |
} |
117 |
if (inp & DFL(DC_RESUME)) { |
118 |
serv_request(DR_NOOP, 0, NULL); |
119 |
pause = 0; |
120 |
} |
121 |
if (inp & DFL(DC_PAUSE)) |
122 |
pause = 1; |
123 |
if (inp & DFL(DC_QUIT)) |
124 |
serv_request(DR_SHUTDOWN, 0, NULL); |
125 |
} |
126 |
if (rdy & RDY_SIN && !imm_mode) /* user input from sstdin */ |
127 |
switch (usr_input()) { |
128 |
case DC_PAUSE: |
129 |
pause = 1; |
130 |
break; |
131 |
case DC_RESUME: |
132 |
serv_request(DR_NOOP, 0, NULL); |
133 |
/* fall through */ |
134 |
case DC_KILL: |
135 |
case DC_RESTART: |
136 |
pause = 0; |
137 |
break; |
138 |
} |
139 |
} while (res != DS_SHUTDOWN); |
140 |
#ifdef DEBUG |
141 |
if (timm && nimmrays) |
142 |
fprintf(stderr, |
143 |
"%s: %.1f rays recalled/second (%ld rays total)\n", |
144 |
progname, (double)nimmrays/timm, nimmrays); |
145 |
if (tadd && naddrays) |
146 |
fprintf(stderr, |
147 |
"%s: %.1f rays calculated/second (%ld rays total)\n", |
148 |
progname, (double)naddrays/tadd, naddrays); |
149 |
#endif |
150 |
/* all done */ |
151 |
quit(0); |
152 |
} |
153 |
|
154 |
|
155 |
int |
156 |
disp_wait() /* wait for more input */ |
157 |
{ |
158 |
fd_set readset, errset; |
159 |
int flgs; |
160 |
int n; |
161 |
register int i; |
162 |
/* see if we can avoid select call */ |
163 |
if (hdlist[0] == NULL) |
164 |
return(RDY_SRV); /* initialize first */ |
165 |
flgs = 0; /* flag what's ready already */ |
166 |
if (imm_mode || fbufcnt(stdin) > 0) |
167 |
flgs |= RDY_SRV; |
168 |
if (sstdin != NULL && fbufcnt(sstdin) > 0) |
169 |
flgs |= RDY_SIN; |
170 |
if (odev.inpready) |
171 |
flgs |= RDY_DEV; |
172 |
if (flgs) /* got something? */ |
173 |
return(flgs); |
174 |
if (dev_flush()) /* else flush output & check keyboard+mouse */ |
175 |
return(RDY_DEV); |
176 |
/* if nothing, we need to call select */ |
177 |
FD_ZERO(&readset); FD_ZERO(&errset); |
178 |
FD_SET(0, &readset); |
179 |
FD_SET(0, &errset); |
180 |
FD_SET(odev.ifd, &readset); |
181 |
FD_SET(odev.ifd, &errset); |
182 |
n = odev.ifd+1; |
183 |
if (sstdin != NULL) { |
184 |
FD_SET(fileno(sstdin), &readset); |
185 |
FD_SET(fileno(sstdin), &errset); |
186 |
if (fileno(sstdin) >= n) |
187 |
n = fileno(sstdin) + 1; |
188 |
} |
189 |
n = select(n, &readset, NULL, &errset, NULL); |
190 |
if (n < 0) { |
191 |
if (errno == EINTR) |
192 |
return(0); |
193 |
error(SYSTEM, "select call failure in disp_wait"); |
194 |
} |
195 |
if (FD_ISSET(0, &readset) || FD_ISSET(0, &errset)) |
196 |
flgs |= RDY_SRV; |
197 |
if (FD_ISSET(odev.ifd, &readset) || FD_ISSET(odev.ifd, &errset)) |
198 |
flgs |= RDY_DEV; |
199 |
if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) || |
200 |
FD_ISSET(fileno(sstdin), &errset))) |
201 |
flgs |= RDY_SIN; |
202 |
return(flgs); |
203 |
} |
204 |
|
205 |
|
206 |
add_holo(hdg, gfn, pfn) /* register a new holodeck section */ |
207 |
HDGRID *hdg; |
208 |
char *gfn, *pfn; |
209 |
{ |
210 |
VIEW nv; |
211 |
double d; |
212 |
register int hd; |
213 |
|
214 |
for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++) |
215 |
; |
216 |
if (hd >= HDMAX) |
217 |
error(INTERNAL, "too many holodeck sections in add_holo"); |
218 |
hdlist[hd] = (HOLO *)malloc(sizeof(HOLO)); |
219 |
if (hdlist[hd] == NULL) |
220 |
error(SYSTEM, "out of memory in add_holo"); |
221 |
memcpy((void *)hdlist[hd], (void *)hdg, sizeof(HDGRID)); |
222 |
hdcompgrid(hdlist[hd]); |
223 |
hdgfn[hd] = savestr(gfn); |
224 |
hdpfn[hd] = pfn && *pfn ? savestr(pfn) : (char *)NULL; |
225 |
if (hd) |
226 |
return; |
227 |
/* set initial viewpoint */ |
228 |
nv = odev.v; |
229 |
VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5); |
230 |
VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5); |
231 |
VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5); |
232 |
fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]); |
233 |
VCOPY(nv.vup, hdlist[0]->xv[2]); |
234 |
if (do_outside) { |
235 |
normalize(nv.vdir); |
236 |
d = VLEN(hdlist[0]->xv[1]); |
237 |
d += VLEN(hdlist[0]->xv[2]); |
238 |
VSUM(nv.vp, nv.vp, nv.vdir, -d); |
239 |
} |
240 |
new_view(&nv); |
241 |
} |
242 |
|
243 |
|
244 |
disp_bundle(p) /* display a ray bundle */ |
245 |
register PACKHEAD *p; |
246 |
{ |
247 |
GCOORD gc[2]; |
248 |
FVECT ro, rd, wp; |
249 |
double d; |
250 |
register int i; |
251 |
/* get beam coordinates */ |
252 |
if ((p->hd < 0) | (p->hd >= HDMAX) || hdlist[p->hd] == NULL) |
253 |
error(INTERNAL, "bad holodeck number in disp_bundle"); |
254 |
if (!hdbcoord(gc, hdlist[p->hd], p->bi)) |
255 |
error(INTERNAL, "bad beam index in disp_bundle"); |
256 |
/* display each ray */ |
257 |
for (i = p->nr; i--; ) { |
258 |
hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r); |
259 |
d = hddepth(hdlist[p->hd], packra(p)[i].d); |
260 |
if (d < .99*FHUGE) { |
261 |
VSUM(wp, ro, rd, d); /* might be behind viewpoint */ |
262 |
dev_value(packra(p)[i].v, rd, wp); |
263 |
} else |
264 |
dev_value(packra(p)[i].v, rd, NULL); |
265 |
} |
266 |
#ifdef DEBUG |
267 |
if (imm_mode) nimmrays += p->nr; |
268 |
else naddrays += p->nr; |
269 |
#endif |
270 |
} |
271 |
|
272 |
|
273 |
new_view(v) /* change view parameters */ |
274 |
register VIEW *v; |
275 |
{ |
276 |
static VIEW viewhist[VIEWHISTLEN]; |
277 |
static unsigned nhist; |
278 |
VIEW *dv; |
279 |
int i, res[2]; |
280 |
int16 *slist; |
281 |
char *err; |
282 |
/* restore previous view? */ |
283 |
if (v == NULL) { |
284 |
if (nhist > 1) /* get one before last setting */ |
285 |
nhist--; |
286 |
else /* else go to end of list */ |
287 |
while (nhist < VIEWHISTLEN && viewhist[nhist].type) |
288 |
nhist++; |
289 |
v = viewhist + ((nhist-1)%VIEWHISTLEN); |
290 |
} else |
291 |
again: |
292 |
if ((err = setview(v)) != NULL) { |
293 |
error(COMMAND, err); |
294 |
return; |
295 |
} |
296 |
if (!dev_view(v)) /* notify display driver */ |
297 |
goto again; |
298 |
if (v->type == VT_PAR) { |
299 |
error(COMMAND, "cannot handle parallel views"); |
300 |
return; |
301 |
} |
302 |
beam_init(odev.firstuse); /* compute new beam set */ |
303 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) { |
304 |
if ((slist = beam_view(dv, res[0], res[1])) == NULL) { |
305 |
if (!nhist) { |
306 |
error(COMMAND, "invalid starting view"); |
307 |
return; |
308 |
} |
309 |
*v = *(viewhist + ((nhist-1)%VIEWHISTLEN)); |
310 |
goto again; /* poss. overloading dev_section()? */ |
311 |
} |
312 |
DCHECK(*slist < 0, WARNING, "no visible sections in new_view"); |
313 |
for ( ; *slist >= 0; slist++) |
314 |
dev_section(hdgfn[*slist], hdpfn[*slist]); |
315 |
} |
316 |
dev_section(NULL,NULL); /* end section list */ |
317 |
dev_flush(); /* update display */ |
318 |
/* update server */ |
319 |
imm_mode = beam_sync(odev.firstuse) > 0; |
320 |
/* record new view */ |
321 |
if (v < viewhist || v >= viewhist+VIEWHISTLEN) { |
322 |
*(viewhist + (nhist%VIEWHISTLEN)) = *v; |
323 |
nhist++; |
324 |
} |
325 |
} |
326 |
|
327 |
|
328 |
set_focus(args) /* set focus frame */ |
329 |
char *args; |
330 |
{ |
331 |
double hcent, vcent, hsiz, vsiz; |
332 |
VIEW *dv, vwfocus; |
333 |
int i, res[2]; |
334 |
|
335 |
i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz); |
336 |
if (i < 2 || hcent < 0 || hcent > 1 || vcent < 0 || vcent > 1) { |
337 |
beam_init(0); /* restore view */ |
338 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
339 |
beam_view(dv, res[0], res[1]); |
340 |
beam_sync(0); /* update server */ |
341 |
return; |
342 |
} |
343 |
if (i < 4 || hsiz <= hcent || hsiz > 1 || vsiz <= vcent || vsiz > 1) |
344 |
hsiz = vsiz = FSIZDEF; /* gave center only */ |
345 |
else { |
346 |
hsiz -= hcent; hcent += 0.5*hsiz; /* gave min and max */ |
347 |
vsiz -= vcent; vcent += 0.5*vsiz; |
348 |
} |
349 |
beam_init(0); /* add basic views */ |
350 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
351 |
beam_view(dv, res[0]>>4, res[1]>>4); |
352 |
vwfocus = odev.v; /* add focus view */ |
353 |
switch (odev.v.type) { |
354 |
case VT_PER: |
355 |
vwfocus.horiz = 2.*180./PI*atan( |
356 |
hsiz * tan(PI/180./2.*odev.v.horiz) ); |
357 |
vwfocus.vert = 2.*180./PI*atan( |
358 |
vsiz * tan(PI/180./2.*odev.v.vert) ); |
359 |
break; |
360 |
case VT_PAR: |
361 |
case VT_ANG: |
362 |
vwfocus.horiz = hsiz * odev.v.horiz; |
363 |
vwfocus.vert = vsiz * odev.v.vert; |
364 |
break; |
365 |
case VT_HEM: |
366 |
vwfocus.horiz = 2.*180./PI*asin( |
367 |
hsiz * sin(PI/180./2.*odev.v.horiz) ); |
368 |
vwfocus.vert = 2.*180./PI*asin( |
369 |
vsiz * sin(PI/180./2.*odev.v.vert) ); |
370 |
break; |
371 |
case VT_CYL: |
372 |
vwfocus.horiz = hsiz * odev.v.horiz; |
373 |
vwfocus.vert = 2.*180./PI*atan( |
374 |
vsiz * tan(PI/180./2.*odev.v.vert) ); |
375 |
break; |
376 |
default: |
377 |
error(INTERNAL, "bad view type in set_focus"); |
378 |
} |
379 |
vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz; |
380 |
vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz; |
381 |
setview(&vwfocus); |
382 |
beam_view(&vwfocus, (int)(3*odev.hres*hsiz)+100, |
383 |
(int)(3*odev.vres*vsiz)+100); |
384 |
beam_sync(0); /* update server */ |
385 |
} |
386 |
|
387 |
|
388 |
int |
389 |
usr_input() /* get user input and process it */ |
390 |
{ |
391 |
VIEW vparams; |
392 |
char cmd[256]; |
393 |
register char *args; |
394 |
register int i; |
395 |
|
396 |
if (fgets(cmd, sizeof(cmd), sstdin) == NULL) { |
397 |
fclose(sstdin); |
398 |
sstdin = NULL; |
399 |
return(-1); |
400 |
} |
401 |
if (*cmd == '\n') |
402 |
return(DC_RESUME); |
403 |
for (args = cmd; *args && !isspace(*args); args++) |
404 |
; |
405 |
while (isspace(*args)) |
406 |
*args++ = '\0'; |
407 |
if (*args && args[i=strlen(args)-1] == '\n') |
408 |
args[i] = '\0'; |
409 |
for (i = 0; i < DC_NCMDS; i++) |
410 |
if (!strcmp(cmd, cmdlist[i])) |
411 |
break; |
412 |
if (i >= DC_NCMDS) { |
413 |
dev_auxcom(cmd, args); |
414 |
return(-1); |
415 |
} |
416 |
switch (i) { |
417 |
case DC_SETVIEW: /* set the view */ |
418 |
vparams = odev.v; |
419 |
if (!sscanview(&vparams, args)) |
420 |
error(COMMAND, "missing view options"); |
421 |
else |
422 |
new_view(&vparams); |
423 |
break; |
424 |
case DC_GETVIEW: /* print the current view */ |
425 |
printview(); |
426 |
break; |
427 |
case DC_LASTVIEW: /* restore previous view */ |
428 |
new_view(NULL); |
429 |
break; |
430 |
case DC_FOCUS: /* set focus frame */ |
431 |
set_focus(args); |
432 |
break; |
433 |
case DC_PAUSE: /* pause the current calculation */ |
434 |
case DC_RESUME: /* resume the calculation */ |
435 |
/* handled in main() */ |
436 |
break; |
437 |
case DC_REDRAW: /* redraw from server */ |
438 |
imm_mode = beam_sync(1) > 0; |
439 |
dev_clear(); |
440 |
break; |
441 |
case DC_KILL: /* kill rtrace process(es) */ |
442 |
serv_request(DR_KILL, 0, NULL); |
443 |
break; |
444 |
case DC_CLOBBER: /* clobber holodeck */ |
445 |
serv_request(DR_CLOBBER, 0, NULL); |
446 |
break; |
447 |
case DC_RESTART: /* restart rtrace */ |
448 |
serv_request(DR_RESTART, 0, NULL); |
449 |
break; |
450 |
case DC_QUIT: /* quit request */ |
451 |
serv_request(DR_SHUTDOWN, 0, NULL); |
452 |
break; |
453 |
default: |
454 |
error(CONSISTENCY, "bad command id in usr_input"); |
455 |
} |
456 |
return(i); |
457 |
} |
458 |
|
459 |
|
460 |
printview() /* print our current view to server stdout */ |
461 |
{ |
462 |
fputs(VIEWSTR, sstdout); |
463 |
fprintview(&odev.v, sstdout); |
464 |
fputc('\n', sstdout); |
465 |
fflush(sstdout); |
466 |
} |
467 |
|
468 |
|
469 |
int |
470 |
serv_result() /* get next server result and process it */ |
471 |
{ |
472 |
static char *buf = NULL; |
473 |
static int bufsiz = 0; |
474 |
MSGHEAD msg; |
475 |
int n; |
476 |
/* read message header */ |
477 |
if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1) |
478 |
goto readerr; |
479 |
if (msg.nbytes > 0) { /* get the message body */ |
480 |
if (msg.nbytes > bufsiz) { |
481 |
if (buf == NULL) |
482 |
buf = (char *)malloc(bufsiz=msg.nbytes); |
483 |
else |
484 |
buf = (char *)realloc((void *)buf, |
485 |
bufsiz=msg.nbytes); |
486 |
if (buf == NULL) |
487 |
error(SYSTEM, "out of memory in serv_result"); |
488 |
} |
489 |
if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes) |
490 |
goto readerr; |
491 |
} |
492 |
switch (msg.type) { /* process results */ |
493 |
case DS_BUNDLE: |
494 |
if (msg.nbytes < sizeof(PACKHEAD) || |
495 |
msg.nbytes != packsiz(((PACKHEAD *)buf)->nr)) |
496 |
error(INTERNAL, "bad display packet from server"); |
497 |
disp_bundle((PACKHEAD *)buf); |
498 |
break; |
499 |
case DS_ADDHOLO: |
500 |
if (msg.nbytes < sizeof(HDGRID)+2) |
501 |
error(INTERNAL, "bad holodeck record from server"); |
502 |
add_holo((HDGRID *)buf, buf+sizeof(HDGRID), |
503 |
buf+sizeof(HDGRID)+strlen(buf+sizeof(HDGRID))+1); |
504 |
break; |
505 |
case DS_OUTSECT: |
506 |
do_outside = 1; |
507 |
goto noargs; |
508 |
case DS_EYESEP: |
509 |
if (msg.nbytes <= 1 || (eyesepdist = atof(buf)) <= FTINY) |
510 |
error(INTERNAL, "bad eye separation from server"); |
511 |
break; |
512 |
case DS_STARTIMM: |
513 |
case DS_ENDIMM: |
514 |
if (!(imm_mode = msg.type==DS_STARTIMM)) |
515 |
dev_flush(); |
516 |
#ifdef DEBUG |
517 |
{ |
518 |
time_t tnow = time(NULL); |
519 |
if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw; |
520 |
else timm += tnow - tmodesw; |
521 |
tmodesw = tnow; |
522 |
} |
523 |
#endif |
524 |
goto noargs; |
525 |
case DS_ACKNOW: |
526 |
case DS_SHUTDOWN: |
527 |
goto noargs; |
528 |
default: |
529 |
error(INTERNAL, "unrecognized result from server process"); |
530 |
} |
531 |
return(msg.type); /* return message type */ |
532 |
noargs: |
533 |
if (msg.nbytes) { |
534 |
sprintf(errmsg, "unexpected body with server message %d", |
535 |
msg.type); |
536 |
error(INTERNAL, errmsg); |
537 |
} |
538 |
return(msg.type); |
539 |
readerr: |
540 |
if (feof(stdin)) |
541 |
error(SYSTEM, "server process died"); |
542 |
error(SYSTEM, "error reading from server process"); |
543 |
} |
544 |
|
545 |
|
546 |
serv_request(type, nbytes, p) /* send a request to the server process */ |
547 |
int type, nbytes; |
548 |
char *p; |
549 |
{ |
550 |
MSGHEAD msg; |
551 |
int m; |
552 |
/* consistency checks */ |
553 |
DCHECK(nbytes < 0 || nbytes > 0 & p == NULL, |
554 |
CONSISTENCY, "bad buffer handed to serv_request"); |
555 |
/* get server's attention for big request */ |
556 |
if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) { |
557 |
serv_request(DR_ATTEN, 0, NULL); |
558 |
while ((m = serv_result()) != DS_ACKNOW) |
559 |
if (m == DS_SHUTDOWN) /* the bugger quit on us */ |
560 |
quit(0); |
561 |
} |
562 |
msg.type = type; /* write and flush the message */ |
563 |
msg.nbytes = nbytes; |
564 |
fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout); |
565 |
if (nbytes > 0) |
566 |
fwrite(p, 1, nbytes, stdout); |
567 |
if (fflush(stdout) < 0) |
568 |
error(SYSTEM, "write error in serv_request"); |
569 |
} |
570 |
|
571 |
|
572 |
void |
573 |
eputs(s) /* put error message to stderr */ |
574 |
register char *s; |
575 |
{ |
576 |
static int midline = 0; |
577 |
|
578 |
if (!*s) |
579 |
return; |
580 |
if (!midline++) { /* prepend line with program name */ |
581 |
fputs(progname, stderr); |
582 |
fputs(": ", stderr); |
583 |
} |
584 |
fputs(s, stderr); |
585 |
if (s[strlen(s)-1] == '\n') { |
586 |
fflush(stderr); |
587 |
midline = 0; |
588 |
} |
589 |
} |
590 |
|
591 |
|
592 |
void |
593 |
quit(code) /* clean up and exit */ |
594 |
int code; |
595 |
{ |
596 |
if (code) |
597 |
exit(code); |
598 |
if (odev.v.type) |
599 |
dev_close(); |
600 |
exit(0); |
601 |
} |