| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Holodeck display process. |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "rholo.h" |
| 12 |
#include "rhdisp.h" |
| 13 |
#include "rhdriver.h" |
| 14 |
#include "selcall.h" |
| 15 |
#include <ctype.h> |
| 16 |
|
| 17 |
#ifndef VIEWHISTLEN |
| 18 |
#define VIEWHISTLEN 4 /* number of remembered views */ |
| 19 |
#endif |
| 20 |
|
| 21 |
#ifndef FSIZDEF |
| 22 |
#define FSIZDEF 0.125 /* default focus frame size */ |
| 23 |
#endif |
| 24 |
|
| 25 |
HOLO *hdlist[HDMAX+1]; /* global holodeck list */ |
| 26 |
|
| 27 |
char cmdlist[DC_NCMDS][8] = DC_INIT; |
| 28 |
|
| 29 |
int imm_mode = 0; /* bundles are being delivered immediately */ |
| 30 |
|
| 31 |
int do_outside = 0; /* render from outside sections */ |
| 32 |
|
| 33 |
double eyesepdist = 1; /* eye separation distance */ |
| 34 |
|
| 35 |
char *progname; /* global argv[0] */ |
| 36 |
|
| 37 |
FILE *sstdin, *sstdout; /* server's standard input and output */ |
| 38 |
|
| 39 |
#ifdef DEBUG |
| 40 |
#include <sys/types.h> |
| 41 |
extern time_t time(); |
| 42 |
static time_t tmodesw; |
| 43 |
static time_t timm, tadd; |
| 44 |
static long nimmrays, naddrays; |
| 45 |
#endif |
| 46 |
|
| 47 |
#define RDY_SRV 01 |
| 48 |
#define RDY_DEV 02 |
| 49 |
#define RDY_SIN 04 |
| 50 |
|
| 51 |
|
| 52 |
main(argc, argv) |
| 53 |
int argc; |
| 54 |
char *argv[]; |
| 55 |
{ |
| 56 |
extern int eputs(); |
| 57 |
int rdy, inp, res = 0, pause = 0; |
| 58 |
|
| 59 |
progname = argv[0]; |
| 60 |
if (argc < 3) |
| 61 |
error(USER, "bad command line arguments"); |
| 62 |
/* open our device */ |
| 63 |
dev_open(argv[1]); |
| 64 |
/* open server process i/o */ |
| 65 |
sstdout = fdopen(atoi(argv[2]), "w"); |
| 66 |
if (argc < 4 || (inp = atoi(argv[3])) < 0) |
| 67 |
sstdin = NULL; |
| 68 |
else |
| 69 |
sstdin = fdopen(inp, "r"); |
| 70 |
/* set command error vector */ |
| 71 |
erract[COMMAND].pf = eputs; |
| 72 |
#ifdef DEBUG |
| 73 |
tmodesw = time(NULL); |
| 74 |
#endif |
| 75 |
/* enter main loop */ |
| 76 |
do { |
| 77 |
rdy = disp_wait(); |
| 78 |
if (rdy & RDY_SRV) { /* process server result */ |
| 79 |
res = serv_result(); |
| 80 |
if (pause && res != DS_SHUTDOWN) { |
| 81 |
serv_request(DR_ATTEN, 0, NULL); |
| 82 |
while ((res = serv_result()) != DS_ACKNOW && |
| 83 |
res != DS_SHUTDOWN) |
| 84 |
; |
| 85 |
} |
| 86 |
} |
| 87 |
if (rdy & RDY_DEV) { /* user input from driver */ |
| 88 |
inp = dev_input(); |
| 89 |
if (inp & DFL(DC_SETVIEW)) |
| 90 |
new_view(&odev.v); |
| 91 |
if (inp & DFL(DC_GETVIEW)) |
| 92 |
printview(); |
| 93 |
if (inp & DFL(DC_LASTVIEW)) |
| 94 |
new_view(NULL); |
| 95 |
if (inp & DFL(DC_FOCUS)) |
| 96 |
set_focus(odev_args); |
| 97 |
if (inp & DFL(DC_KILL)) { |
| 98 |
serv_request(DR_KILL, 0, NULL); |
| 99 |
pause = 0; |
| 100 |
} |
| 101 |
if (inp & DFL(DC_CLOBBER)) |
| 102 |
serv_request(DR_CLOBBER, 0, NULL); |
| 103 |
if (inp & DFL(DC_RESTART)) { |
| 104 |
serv_request(DR_RESTART, 0, NULL); |
| 105 |
pause = 0; |
| 106 |
} |
| 107 |
if (inp & DFL(DC_RESUME)) { |
| 108 |
serv_request(DR_NOOP, 0, NULL); |
| 109 |
pause = 0; |
| 110 |
} |
| 111 |
if (inp & DFL(DC_PAUSE)) |
| 112 |
pause = 1; |
| 113 |
if (inp & DFL(DC_REDRAW)) |
| 114 |
imm_mode = beam_sync(1) > 0; |
| 115 |
if (inp & DFL(DC_QUIT)) |
| 116 |
serv_request(DR_SHUTDOWN, 0, NULL); |
| 117 |
} |
| 118 |
if (rdy & RDY_SIN && !imm_mode) /* user input from sstdin */ |
| 119 |
switch (usr_input()) { |
| 120 |
case DC_PAUSE: |
| 121 |
pause = 1; |
| 122 |
break; |
| 123 |
case DC_RESUME: |
| 124 |
serv_request(DR_NOOP, 0, NULL); |
| 125 |
/* fall through */ |
| 126 |
case DC_KILL: |
| 127 |
case DC_RESTART: |
| 128 |
pause = 0; |
| 129 |
break; |
| 130 |
} |
| 131 |
} while (res != DS_SHUTDOWN); |
| 132 |
#ifdef DEBUG |
| 133 |
if (timm && nimmrays) |
| 134 |
fprintf(stderr, |
| 135 |
"%s: %.1f rays recalled/second (%ld rays total)\n", |
| 136 |
progname, (double)nimmrays/timm, nimmrays); |
| 137 |
if (tadd && naddrays) |
| 138 |
fprintf(stderr, |
| 139 |
"%s: %.1f rays calculated/second (%ld rays total)\n", |
| 140 |
progname, (double)naddrays/tadd, naddrays); |
| 141 |
#endif |
| 142 |
/* all done */ |
| 143 |
quit(0); |
| 144 |
} |
| 145 |
|
| 146 |
|
| 147 |
int |
| 148 |
disp_wait() /* wait for more input */ |
| 149 |
{ |
| 150 |
fd_set readset, errset; |
| 151 |
int flgs; |
| 152 |
int n; |
| 153 |
register int i; |
| 154 |
/* see if we can avoid select call */ |
| 155 |
flgs = 0; /* flag what's ready already */ |
| 156 |
if (imm_mode || stdin->_cnt > 0) |
| 157 |
flgs |= RDY_SRV; |
| 158 |
if (sstdin != NULL && sstdin->_cnt > 0) |
| 159 |
flgs |= RDY_SIN; |
| 160 |
if (odev.inpready) |
| 161 |
flgs |= RDY_DEV; |
| 162 |
if (flgs) /* got something? */ |
| 163 |
return(flgs); |
| 164 |
if (dev_flush()) /* else flush output & check keyboard+mouse */ |
| 165 |
return(RDY_DEV); |
| 166 |
/* if nothing, we need to call select */ |
| 167 |
FD_ZERO(&readset); FD_ZERO(&errset); |
| 168 |
FD_SET(0, &readset); |
| 169 |
FD_SET(0, &errset); |
| 170 |
FD_SET(odev.ifd, &readset); |
| 171 |
FD_SET(odev.ifd, &errset); |
| 172 |
n = odev.ifd+1; |
| 173 |
if (sstdin != NULL) { |
| 174 |
FD_SET(fileno(sstdin), &readset); |
| 175 |
FD_SET(fileno(sstdin), &errset); |
| 176 |
if (fileno(sstdin) >= n) |
| 177 |
n = fileno(sstdin) + 1; |
| 178 |
} |
| 179 |
n = select(n, &readset, NULL, &errset, NULL); |
| 180 |
if (n < 0) { |
| 181 |
if (errno == EINTR) |
| 182 |
return(0); |
| 183 |
error(SYSTEM, "select call failure in disp_wait"); |
| 184 |
} |
| 185 |
if (FD_ISSET(0, &readset) || FD_ISSET(0, &errset)) |
| 186 |
flgs |= RDY_SRV; |
| 187 |
if (FD_ISSET(odev.ifd, &readset) || FD_ISSET(odev.ifd, &errset)) |
| 188 |
flgs |= RDY_DEV; |
| 189 |
if (sstdin != NULL && (FD_ISSET(fileno(sstdin), &readset) || |
| 190 |
FD_ISSET(fileno(sstdin), &errset))) |
| 191 |
flgs |= RDY_SIN; |
| 192 |
return(flgs); |
| 193 |
} |
| 194 |
|
| 195 |
|
| 196 |
add_holo(hdg) /* register a new holodeck section */ |
| 197 |
HDGRID *hdg; |
| 198 |
{ |
| 199 |
VIEW nv; |
| 200 |
double d; |
| 201 |
register int hd; |
| 202 |
|
| 203 |
for (hd = 0; hd < HDMAX && hdlist[hd] != NULL; hd++) |
| 204 |
; |
| 205 |
if (hd >= HDMAX) |
| 206 |
error(INTERNAL, "too many holodeck sections in add_holo"); |
| 207 |
hdlist[hd] = (HOLO *)malloc(sizeof(HOLO)); |
| 208 |
if (hdlist[hd] == NULL) |
| 209 |
error(SYSTEM, "out of memory in add_holo"); |
| 210 |
bcopy((char *)hdg, (char *)hdlist[hd], sizeof(HDGRID)); |
| 211 |
hdcompgrid(hdlist[hd]); |
| 212 |
if (hd) |
| 213 |
return; |
| 214 |
/* set initial viewpoint */ |
| 215 |
copystruct(&nv, &odev.v); |
| 216 |
VSUM(nv.vp, hdlist[0]->orig, hdlist[0]->xv[0], 0.5); |
| 217 |
VSUM(nv.vp, nv.vp, hdlist[0]->xv[1], 0.5); |
| 218 |
VSUM(nv.vp, nv.vp, hdlist[0]->xv[2], 0.5); |
| 219 |
fcross(nv.vdir, hdlist[0]->xv[1], hdlist[0]->xv[2]); |
| 220 |
VCOPY(nv.vup, hdlist[0]->xv[2]); |
| 221 |
if (do_outside) { |
| 222 |
normalize(nv.vdir); |
| 223 |
d = VLEN(hdlist[0]->xv[1]); |
| 224 |
d += VLEN(hdlist[0]->xv[2]); |
| 225 |
VSUM(nv.vp, nv.vp, nv.vdir, -d); |
| 226 |
} |
| 227 |
new_view(&nv); |
| 228 |
} |
| 229 |
|
| 230 |
|
| 231 |
disp_bundle(p) /* display a ray bundle */ |
| 232 |
register PACKHEAD *p; |
| 233 |
{ |
| 234 |
GCOORD gc[2]; |
| 235 |
FVECT ro, rd, wp; |
| 236 |
double d; |
| 237 |
register int i; |
| 238 |
/* get beam coordinates */ |
| 239 |
if (p->hd < 0 | p->hd >= HDMAX || hdlist[p->hd] == NULL) |
| 240 |
error(INTERNAL, "bad holodeck number in disp_bundle"); |
| 241 |
if (!hdbcoord(gc, hdlist[p->hd], p->bi)) |
| 242 |
error(INTERNAL, "bad beam index in disp_bundle"); |
| 243 |
/* display each ray */ |
| 244 |
for (i = p->nr; i--; ) { |
| 245 |
hdray(ro, rd, hdlist[p->hd], gc, packra(p)[i].r); |
| 246 |
d = hddepth(hdlist[p->hd], packra(p)[i].d); |
| 247 |
if (d < .99*FHUGE) { |
| 248 |
VSUM(wp, ro, rd, d); /* might be behind viewpoint */ |
| 249 |
dev_value(packra(p)[i].v, rd, wp); |
| 250 |
} else |
| 251 |
dev_value(packra(p)[i].v, rd, NULL); |
| 252 |
} |
| 253 |
#ifdef DEBUG |
| 254 |
if (imm_mode) nimmrays += p->nr; |
| 255 |
else naddrays += p->nr; |
| 256 |
#endif |
| 257 |
} |
| 258 |
|
| 259 |
|
| 260 |
new_view(v) /* change view parameters */ |
| 261 |
register VIEW *v; |
| 262 |
{ |
| 263 |
static VIEW viewhist[VIEWHISTLEN]; |
| 264 |
static unsigned nhist; |
| 265 |
VIEW *dv; |
| 266 |
int i, res[2]; |
| 267 |
char *err; |
| 268 |
/* restore previous view? */ |
| 269 |
if (v == NULL) { |
| 270 |
if (nhist > 1) /* get one before last setting */ |
| 271 |
nhist--; |
| 272 |
else /* else go to end of list */ |
| 273 |
while (nhist < VIEWHISTLEN && viewhist[nhist].type) |
| 274 |
nhist++; |
| 275 |
v = viewhist + ((nhist-1)%VIEWHISTLEN); |
| 276 |
} else |
| 277 |
again: |
| 278 |
if ((err = setview(v)) != NULL) { |
| 279 |
error(COMMAND, err); |
| 280 |
return; |
| 281 |
} |
| 282 |
if (v->type == VT_PAR) { |
| 283 |
error(COMMAND, "cannot handle parallel views"); |
| 284 |
return; |
| 285 |
} |
| 286 |
if (!dev_view(v)) /* notify display driver */ |
| 287 |
goto again; |
| 288 |
dev_flush(); /* update screen */ |
| 289 |
beam_init(0); /* compute new beam set */ |
| 290 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
| 291 |
if (!beam_view(dv, res[0], res[1])) { |
| 292 |
if (!nhist) { |
| 293 |
error(COMMAND, "invalid starting view"); |
| 294 |
return; |
| 295 |
} |
| 296 |
copystruct(v, viewhist + ((nhist-1)%VIEWHISTLEN)); |
| 297 |
goto again; |
| 298 |
} |
| 299 |
/* update server */ |
| 300 |
imm_mode = beam_sync(0) > 0; |
| 301 |
/* record new view */ |
| 302 |
if (v < viewhist || v >= viewhist+VIEWHISTLEN) { |
| 303 |
copystruct(viewhist + (nhist%VIEWHISTLEN), v); |
| 304 |
nhist++; |
| 305 |
} |
| 306 |
} |
| 307 |
|
| 308 |
|
| 309 |
set_focus(args) /* set focus frame */ |
| 310 |
char *args; |
| 311 |
{ |
| 312 |
double hcent, vcent, hsiz, vsiz; |
| 313 |
VIEW *dv, vwfocus; |
| 314 |
int i, res[2]; |
| 315 |
|
| 316 |
i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz); |
| 317 |
if (i < 2 || hcent < 0 || hcent > 1 || vcent < 0 || vcent > 1) { |
| 318 |
beam_init(0); /* restore view */ |
| 319 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
| 320 |
beam_view(dv, res[0], res[1]); |
| 321 |
beam_sync(0); /* update server */ |
| 322 |
return; |
| 323 |
} |
| 324 |
if (i < 4 || hsiz <= hcent || hsiz > 1 || vsiz <= vcent || vsiz > 1) |
| 325 |
hsiz = vsiz = FSIZDEF; /* gave center only */ |
| 326 |
else { |
| 327 |
hsiz -= hcent; hcent += 0.5*hsiz; /* gave min and max */ |
| 328 |
vsiz -= vcent; vcent += 0.5*vsiz; |
| 329 |
} |
| 330 |
beam_init(0); /* add basic views */ |
| 331 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
| 332 |
beam_view(dv, res[0]>>4, res[1]>>4); |
| 333 |
copystruct(&vwfocus, &odev.v); /* add focus view */ |
| 334 |
switch (odev.v.type) { |
| 335 |
case VT_PER: |
| 336 |
vwfocus.horiz = 2.*180./PI*atan( |
| 337 |
hsiz * tan(PI/180./2.*odev.v.horiz) ); |
| 338 |
vwfocus.vert = 2.*180./PI*atan( |
| 339 |
vsiz * tan(PI/180./2.*odev.v.vert) ); |
| 340 |
break; |
| 341 |
case VT_PAR: |
| 342 |
case VT_ANG: |
| 343 |
vwfocus.horiz = hsiz * odev.v.horiz; |
| 344 |
vwfocus.vert = vsiz * odev.v.vert; |
| 345 |
break; |
| 346 |
case VT_HEM: |
| 347 |
vwfocus.horiz = 2.*180./PI*asin( |
| 348 |
hsiz * sin(PI/180./2.*odev.v.horiz) ); |
| 349 |
vwfocus.vert = 2.*180./PI*asin( |
| 350 |
vsiz * sin(PI/180./2.*odev.v.vert) ); |
| 351 |
break; |
| 352 |
case VT_CYL: |
| 353 |
vwfocus.horiz = hsiz * odev.v.horiz; |
| 354 |
vwfocus.vert = 2.*180./PI*atan( |
| 355 |
vsiz * tan(PI/180./2.*odev.v.vert) ); |
| 356 |
break; |
| 357 |
default: |
| 358 |
error(INTERNAL, "bad view type in set_focus"); |
| 359 |
} |
| 360 |
vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz; |
| 361 |
vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz; |
| 362 |
setview(&vwfocus); |
| 363 |
beam_view(&vwfocus, (int)(3*odev.hres*hsiz)+100, |
| 364 |
(int)(3*odev.vres*vsiz)+100); |
| 365 |
beam_sync(0); /* update server */ |
| 366 |
} |
| 367 |
|
| 368 |
|
| 369 |
int |
| 370 |
usr_input() /* get user input and process it */ |
| 371 |
{ |
| 372 |
VIEW vparams; |
| 373 |
char cmd[256]; |
| 374 |
register char *args; |
| 375 |
register int i; |
| 376 |
|
| 377 |
if (fgets(cmd, sizeof(cmd), sstdin) == NULL) { |
| 378 |
fclose(sstdin); |
| 379 |
sstdin = NULL; |
| 380 |
return(-1); |
| 381 |
} |
| 382 |
if (*cmd == '\n') |
| 383 |
return(DC_RESUME); |
| 384 |
for (args = cmd; *args && !isspace(*args); args++) |
| 385 |
; |
| 386 |
while (isspace(*args)) |
| 387 |
*args++ = '\0'; |
| 388 |
if (*args && args[i=strlen(args)-1] == '\n') |
| 389 |
args[i] = '\0'; |
| 390 |
for (i = 0; i < DC_NCMDS; i++) |
| 391 |
if (!strcmp(cmd, cmdlist[i])) |
| 392 |
break; |
| 393 |
if (i >= DC_NCMDS) { |
| 394 |
dev_auxcom(cmd, args); |
| 395 |
return(-1); |
| 396 |
} |
| 397 |
switch (i) { |
| 398 |
case DC_SETVIEW: /* set the view */ |
| 399 |
copystruct(&vparams, &odev.v); |
| 400 |
if (!sscanview(&vparams, args)) |
| 401 |
error(COMMAND, "missing view options"); |
| 402 |
else |
| 403 |
new_view(&vparams); |
| 404 |
break; |
| 405 |
case DC_GETVIEW: /* print the current view */ |
| 406 |
printview(); |
| 407 |
break; |
| 408 |
case DC_LASTVIEW: /* restore previous view */ |
| 409 |
new_view(NULL); |
| 410 |
break; |
| 411 |
case DC_FOCUS: /* set focus frame */ |
| 412 |
set_focus(args); |
| 413 |
break; |
| 414 |
case DC_PAUSE: /* pause the current calculation */ |
| 415 |
case DC_RESUME: /* resume the calculation */ |
| 416 |
/* handled in main() */ |
| 417 |
break; |
| 418 |
case DC_REDRAW: /* redraw from server */ |
| 419 |
imm_mode = beam_sync(1) > 0; |
| 420 |
dev_clear(); |
| 421 |
break; |
| 422 |
case DC_KILL: /* kill rtrace process(es) */ |
| 423 |
serv_request(DR_KILL, 0, NULL); |
| 424 |
break; |
| 425 |
case DC_CLOBBER: /* clobber holodeck */ |
| 426 |
serv_request(DR_CLOBBER, 0, NULL); |
| 427 |
break; |
| 428 |
case DC_RESTART: /* restart rtrace */ |
| 429 |
serv_request(DR_RESTART, 0, NULL); |
| 430 |
break; |
| 431 |
case DC_QUIT: /* quit request */ |
| 432 |
serv_request(DR_SHUTDOWN, 0, NULL); |
| 433 |
break; |
| 434 |
default: |
| 435 |
error(CONSISTENCY, "bad command id in usr_input"); |
| 436 |
} |
| 437 |
return(i); |
| 438 |
} |
| 439 |
|
| 440 |
|
| 441 |
printview() /* print our current view to server stdout */ |
| 442 |
{ |
| 443 |
fputs(VIEWSTR, sstdout); |
| 444 |
fprintview(&odev.v, sstdout); |
| 445 |
fputc('\n', sstdout); |
| 446 |
fflush(sstdout); |
| 447 |
} |
| 448 |
|
| 449 |
|
| 450 |
int |
| 451 |
serv_result() /* get next server result and process it */ |
| 452 |
{ |
| 453 |
static char *buf = NULL; |
| 454 |
static int bufsiz = 0; |
| 455 |
MSGHEAD msg; |
| 456 |
int n; |
| 457 |
/* read message header */ |
| 458 |
if (fread((char *)&msg, sizeof(MSGHEAD), 1, stdin) != 1) |
| 459 |
goto readerr; |
| 460 |
if (msg.nbytes > 0) { /* get the message body */ |
| 461 |
if (msg.nbytes > bufsiz) { |
| 462 |
if (buf == NULL) |
| 463 |
buf = (char *)malloc(bufsiz=msg.nbytes); |
| 464 |
else |
| 465 |
buf = (char *)realloc(buf, bufsiz=msg.nbytes); |
| 466 |
if (buf == NULL) |
| 467 |
error(SYSTEM, "out of memory in serv_result"); |
| 468 |
} |
| 469 |
if (fread(buf, 1, msg.nbytes, stdin) != msg.nbytes) |
| 470 |
goto readerr; |
| 471 |
} |
| 472 |
switch (msg.type) { /* process results */ |
| 473 |
case DS_BUNDLE: |
| 474 |
if (msg.nbytes < sizeof(PACKHEAD) || |
| 475 |
msg.nbytes != packsiz(((PACKHEAD *)buf)->nr)) |
| 476 |
error(INTERNAL, "bad display packet from server"); |
| 477 |
disp_bundle((PACKHEAD *)buf); |
| 478 |
break; |
| 479 |
case DS_ADDHOLO: |
| 480 |
if (msg.nbytes != sizeof(HDGRID)) |
| 481 |
error(INTERNAL, "bad holodeck record from server"); |
| 482 |
add_holo((HDGRID *)buf); |
| 483 |
break; |
| 484 |
case DS_OUTSECT: |
| 485 |
do_outside = 1; |
| 486 |
goto noargs; |
| 487 |
case DS_EYESEP: |
| 488 |
if (msg.nbytes <= 1 || (eyesepdist = atof(buf)) <= FTINY) |
| 489 |
error(INTERNAL, "bad eye separation from server"); |
| 490 |
break; |
| 491 |
case DS_STARTIMM: |
| 492 |
case DS_ENDIMM: |
| 493 |
#ifdef DEBUG |
| 494 |
{ |
| 495 |
time_t tnow = time(NULL); |
| 496 |
if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw; |
| 497 |
else timm += tnow - tmodesw; |
| 498 |
tmodesw = tnow; |
| 499 |
} |
| 500 |
#endif |
| 501 |
if (!(imm_mode = msg.type==DS_STARTIMM)) |
| 502 |
dev_flush(); |
| 503 |
goto noargs; |
| 504 |
case DS_ACKNOW: |
| 505 |
case DS_SHUTDOWN: |
| 506 |
goto noargs; |
| 507 |
default: |
| 508 |
error(INTERNAL, "unrecognized result from server process"); |
| 509 |
} |
| 510 |
return(msg.type); /* return message type */ |
| 511 |
noargs: |
| 512 |
if (msg.nbytes) { |
| 513 |
sprintf(errmsg, "unexpected body with server message %d", |
| 514 |
msg.type); |
| 515 |
error(INTERNAL, errmsg); |
| 516 |
} |
| 517 |
return(msg.type); |
| 518 |
readerr: |
| 519 |
if (feof(stdin)) |
| 520 |
error(SYSTEM, "server process died"); |
| 521 |
error(SYSTEM, "error reading from server process"); |
| 522 |
} |
| 523 |
|
| 524 |
|
| 525 |
serv_request(type, nbytes, p) /* send a request to the server process */ |
| 526 |
int type, nbytes; |
| 527 |
char *p; |
| 528 |
{ |
| 529 |
MSGHEAD msg; |
| 530 |
int m; |
| 531 |
/* consistency checks */ |
| 532 |
#ifdef DEBUG |
| 533 |
if (nbytes < 0 || nbytes > 0 & p == NULL) |
| 534 |
error(CONSISTENCY, "bad buffer handed to serv_request"); |
| 535 |
#endif |
| 536 |
/* get server's attention for big request */ |
| 537 |
if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) { |
| 538 |
serv_request(DR_ATTEN, 0, NULL); |
| 539 |
while ((m = serv_result()) != DS_ACKNOW) |
| 540 |
if (m == DS_SHUTDOWN) /* the bugger quit on us */ |
| 541 |
quit(0); |
| 542 |
} |
| 543 |
msg.type = type; /* write and flush the message */ |
| 544 |
msg.nbytes = nbytes; |
| 545 |
fwrite((char *)&msg, sizeof(MSGHEAD), 1, stdout); |
| 546 |
if (nbytes > 0) |
| 547 |
fwrite(p, 1, nbytes, stdout); |
| 548 |
if (fflush(stdout) < 0) |
| 549 |
error(SYSTEM, "write error in serv_request"); |
| 550 |
} |
| 551 |
|
| 552 |
|
| 553 |
eputs(s) /* put error message to stderr */ |
| 554 |
register char *s; |
| 555 |
{ |
| 556 |
static int midline = 0; |
| 557 |
|
| 558 |
if (!*s) |
| 559 |
return; |
| 560 |
if (!midline++) { /* prepend line with program name */ |
| 561 |
fputs(progname, stderr); |
| 562 |
fputs(": ", stderr); |
| 563 |
} |
| 564 |
fputs(s, stderr); |
| 565 |
if (s[strlen(s)-1] == '\n') { |
| 566 |
fflush(stderr); |
| 567 |
midline = 0; |
| 568 |
} |
| 569 |
} |
| 570 |
|
| 571 |
|
| 572 |
quit(code) /* clean up and exit */ |
| 573 |
int code; |
| 574 |
{ |
| 575 |
if (odev.v.type) |
| 576 |
dev_close(); |
| 577 |
exit(code); |
| 578 |
} |
