extern void
persistfile( /* open persist file and lock it */
char *pfn
)
{
persistfd = open(pfn, O_WRONLY|O_CREAT|O_EXCL, 0644);
if (persistfd >= 0) {
persistfname = pfn;
pflock(1);
return;
}
/* file exists -- switch to i/o process */
persistfd = open(pfn, O_RDWR);
if (persistfd < 0) {
sprintf(errmsg, "cannot open persist file \"%s\"", pfn);
error(SYSTEM, errmsg);
}
pflock(1);
io_process(); /* never returns */
}
extern void
pfhold(void) /* holding pattern for idle rendering process */
{
rsighandler_t *oldalrm;
char buf[512];
register int n;
/* close input and output descriptors */
close(0);
close(1);
if (errfile == NULL)
close(2);
/* create named pipes for input and output */
if (mkfifo(mktemp(strcpy(inpname,TEMPLATE)), 0600) < 0)
goto createrr;
if (mkfifo(mktemp(strcpy(outpname,TEMPLATE)), 0600) < 0)
goto createrr;
if (errfile == NULL &&
mkfifo(mktemp(strcpy(errname,TEMPLATE)), 0600) < 0)
goto createrr;
sprintf(buf, "%s %d\n%s\n%s\n%s\n", progname, getpid(),
inpname, outpname, errname);
n = strlen(buf);
if (write(persistfd, buf, n) < n)
error(SYSTEM, "error writing persist file");
lseek(persistfd, (off_t)0, SEEK_SET);
/* wait TIMELIM for someone to signal us */
got_io = 0;
signal(SIGIO, sig_io);
oldalrm = signal(SIGALRM, sig_alrm);
alarm(TIMELIM);
pflock(0); /* unlock persist file for attach */
while (!got_io)
pause(); /* wait for attach */
alarm(0); /* turn off alarm */
signal(SIGALRM, oldalrm);
signal(SIGIO, SIG_DFL);
pflock(1); /* grab persist file back */
/* someone wants us; reopen stdin and stdout */
close(0);
if (open(inpname, O_RDONLY) != 0)
error(INTERNAL, "unexpected stdin file number");
clearerr(stdin);
close(1);
if (open(outpname, O_WRONLY) != 1)
error(INTERNAL, "unexpected stdout file number");
sleep(3); /* give them a chance to open their pipes */
if (errname[0]) {
close(2);
if (open(errname, O_WRONLY) != 2)
error(INTERNAL, "unexpected stderr file number");
unlink(errname);
errname[0] = '\0';
}
unlink(inpname);
inpname[0] = '\0';
unlink(outpname);
outpname[0] = '\0';
return;
createrr:
error(SYSTEM, "cannot create named pipes in pfhold");
}
extern void
io_process(void) /* just act as go-between for actual process */
{
register char *cp;
register int nr, n;
char buf[BUFSIZ], *pfin, *pfout, *pferr;
int pid, nfds;
int fdout, fderr = -1;
int status = 0;
fd_set readfds, excepfds;
/* load persist file */
n = 40;
while ((nr = read(persistfd, buf, sizeof(buf)-1)) == 0) {
if (!n--)
error(USER, "unattended persist file?");
pflock(0);
sleep(3+(3*getpid()+random())%13); /* wait until ready */
pflock(1);
}
if (nr < 0)
error(SYSTEM, "error reading persist file");
#ifndef _WIN32 /* XXX we need a replacement for that one */
ftruncate(persistfd, (off_t)0L); /* truncate persist file */
#endif
pfdetach(); /* close & release persist file */
buf[nr] = '\0'; /* parse what we got */
if ((cp = strchr(buf, ' ')) == NULL)
goto formerr;
*cp++ = '\0';
if ((pid = atoi(cp)) <= 0)
goto formerr;
if ((cp = strchr(cp, '\n')) == NULL)
goto formerr;
pfin = ++cp;
if ((cp = strchr(cp, '\n')) == NULL)
goto formerr;
*cp++ = '\0';
pfout = cp;
if ((cp = strchr(cp, '\n')) == NULL)
goto formerr;
*cp++ = '\0';
pferr = cp;
if ((cp = strchr(cp, '\n')) == NULL)
goto formerr;
*cp++ = '\0';
if (cp-buf != nr)
goto formerr;
if (strcmp(buf, progname)) {
sprintf(errmsg, "persist file for %s, not %s", buf, progname);
error(USER, errmsg);
}
/* wake up rendering process */
if (kill(pid, SIGIO) < 0)
error(SYSTEM, "cannot signal rendering process in io_process");
/* fork child feeder process */
pid = fork();
if (pid < 0)
error(SYSTEM, "fork failed in io_process");
if (pid == 0) { /* feeder loop */
int fdin;
close(1); /* open input pipe */
if ((fdin = open(pfin, O_WRONLY)) < 0)
error(SYSTEM, "cannot open feed pipe in io_process");
/* renderer stdin */
while ((nr = read(0, cp=buf, sizeof(buf))) > 0) {
do {
if ((n = write(fdin, cp, nr)) <= 0)
goto writerr;
cp += n;
} while ((nr -= n) > 0);
}
if (nr < 0)
goto readerr;
_exit(0);
}
close(0);
/* open output pipes, in order */
if ((fdout = open(pfout, O_RDONLY)) < 0)
error(SYSTEM, "cannot open output pipe in io_process");
if (pferr[0] && (fderr = open(pferr, O_RDONLY)) < 0)
error(SYSTEM, "cannot open error pipe in io_process");
for ( ; ; ) { /* eater loop */
FD_ZERO(&readfds);
FD_ZERO(&excepfds);
nfds = 0;
if (fdout >= 0) {
FD_SET(fdout, &readfds);
FD_SET(fdout, &excepfds);
nfds = fdout+1;
}
if (fderr >= 0) {
FD_SET(fderr, &readfds);
FD_SET(fderr, &excepfds);
nfds = fderr+1;
}
if (nfds == 0)
break; /* all done, exit */
if (select(nfds, &readfds, NULL, &excepfds, NULL) < 0)
error(SYSTEM, "error in select call in io_process");
/* renderer stderr */
if (fderr >= 0 && (FD_ISSET(fderr, &readfds) ||
FD_ISSET(fderr, &excepfds))) {
nr = read(fderr, cp=buf, sizeof(buf));
if (nr < 0)
goto readerr;
if (nr == 0) {
close(fderr);
/* close(2); don't close stderr! */
fderr = -1;
} else {
cp[nr] = '\0'; /* deduce status if we can */
n = strlen(progname);
if (!strncmp(cp, progname, n) &&
cp[n++] == ':' &&
cp[n++] == ' ') {
register struct erract *ep;
for (ep = erract; ep < erract+NERRS;
ep++)
if (ep->pre[0] &&
!strncmp(cp+n, ep->pre,
strlen(ep->pre))) {
status = ep->ec;
break;
}
}
do { /* write message */
if ((n = write(2, cp, nr)) <= 0)
goto writerr;
cp += n;
} while ((nr -= n) > 0);
}
}
/* renderer stdout */
if (fdout >= 0 && (FD_ISSET(fdout, &readfds) ||
FD_ISSET(fdout, &excepfds))) {
nr = read(fdout, cp=buf, sizeof(buf));
if (nr < 0)
goto readerr;
if (nr == 0) { /* EOF */
close(fdout);
close(1);
fdout = -1;
} else
do { /* write it all */
if ((n = write(1, cp, nr)) <= 0)
goto writerr;
cp += n;
} while ((nr -= n) > 0);
}
}
kill(pid, SIGTERM); /* no more process to feed, so... */
waitpid(pid, 0, 0); /* wait for feeder process */
_exit(status);
formerr:
error(USER, "format error in persist file");
readerr:
error(SYSTEM, "read error in io_process");
writerr:
error(SYSTEM, "write error in io_process");
}
int
main(int argc, char *argv[])
{
#define check(ol,al) if (argv[i][ol] || \
badarg(argc-i-1,argv+i+1,al)) \
goto badopt
#define bool(olen,var) switch (argv[i][olen]) { \
case '\0': var = !var; break; \
case 'y': case 'Y': case 't': case 'T': \
case '+': case '1': var = 1; break; \
case 'n': case 'N': case 'f': case 'F': \
case '-': case '0': var = 0; break; \
default: goto badopt; }
char *err;
char *recover = NULL;
char *outfile = NULL;
char *zfile = NULL;
int loadflags = ~IO_FILES;
int seqstart = 0;
int persist = 0;
int duped1 = -1;
int rval;
int i;
/* record start time */
tstart = time((time_t *)NULL);
/* global program name */
progname = argv[0] = fixargv0(argv[0]);
/* option city */
for (i = 1; i < argc; i++) {
/* expand arguments */
while ((rval = expandarg(&argc, &argv, i)) > 0)
;
if (rval < 0) {
sprintf(errmsg, "cannot expand '%s'", argv[i]);
error(SYSTEM, errmsg);
}
if (argv[i] == NULL || argv[i][0] != '-')
break; /* break from options */
if (!strcmp(argv[i], "-version")) {
puts(VersionID);
quit(0);
}
if (!strcmp(argv[i], "-defaults") ||
!strcmp(argv[i], "-help")) {
printdefaults();
quit(0);
}
rval = getrenderopt(argc-i, argv+i);
if (rval >= 0) {
i += rval;
continue;
}
rval = getviewopt(&ourview, argc-i, argv+i);
if (rval >= 0) {
i += rval;
continue;
}
/* rpict options */
switch (argv[i][1]) {
case 'v': /* view file */
if (argv[i][2] != 'f')
goto badopt;
check(3,"s");
rval = viewfile(argv[++i], &ourview, NULL);
if (rval < 0) {
sprintf(errmsg,
"cannot open view file \"%s\"",
argv[i]);
error(SYSTEM, errmsg);
} else if (rval == 0) {
sprintf(errmsg,
"bad view file \"%s\"",
argv[i]);
error(USER, errmsg);
}
break;
case 'p': /* pixel */
switch (argv[i][2]) {
case 's': /* sample */
check(3,"i");
psample = atoi(argv[++i]);
break;
case 't': /* threshold */
check(3,"f");
maxdiff = atof(argv[++i]);
break;
case 'j': /* jitter */
check(3,"f");
dstrpix = atof(argv[++i]);
break;
case 'a': /* aspect */
check(3,"f");
pixaspect = atof(argv[++i]);
break;
case 'm': /* motion */
check(3,"f");
mblur = atof(argv[++i]);
break;
case 'd': /* aperture */
check(3,"f");
dblur = atof(argv[++i]);
break;
default:
goto badopt;
}
break;
case 'x': /* x resolution */
check(2,"i");
hresolu = atoi(argv[++i]);
break;
case 'y': /* y resolution */
check(2,"i");
vresolu = atoi(argv[++i]);
break;
case 'S': /* slave index */
check(2,"i");
seqstart = atoi(argv[++i]);
break;
case 'o': /* output file */
check(2,"s");
outfile = argv[++i];
break;
case 'z': /* z file */
check(2,"s");
zfile = argv[++i];
break;
case 'r': /* recover file */
if (argv[i][2] == 'o') { /* +output */
check(3,"s");
outfile = argv[i+1];
} else
check(2,"s");
recover = argv[++i];
break;
case 't': /* timer */
check(2,"i");
ralrm = atoi(argv[++i]);
break;
#ifdef PERSIST
case 'P': /* persist file */
if (argv[i][2] == 'P') {
check(3,"s");
persist = PARALLEL;
} else {
check(2,"s");
persist = PERSIST;
}
persistfile(argv[++i]);
break;
#endif
case 'w': /* warnings */
rval = erract[WARNING].pf != NULL;
bool(2,rval);
if (rval) erract[WARNING].pf = wputs;
else erract[WARNING].pf = NULL;
break;
case 'e': /* error file */
check(2,"s");
errfile = argv[++i];
break;
default:
goto badopt;
}
}
err = setview(&ourview); /* set viewing parameters */
if (err != NULL)
error(USER, err);
/* initialize object types */
initotypes();
/* initialize urand */
if (rand_samp) {
srandom((long)time(0));
initurand(0);
} else {
srandom(0L);
initurand(2048);
}
/* set up signal handling */
sigdie(SIGINT, "Interrupt");
#ifdef SIGHUP
sigdie(SIGHUP, "Hangup");
#endif
sigdie(SIGTERM, "Terminate");
#ifdef SIGPIPE
sigdie(SIGPIPE, "Broken pipe");
#endif
#ifdef SIGALRM
sigdie(SIGALRM, "Alarm clock");
#endif
#ifdef SIGXCPU
sigdie(SIGXCPU, "CPU limit exceeded");
sigdie(SIGXFSZ, "File size exceeded");
#endif
/* open error file */
if (errfile != NULL) {
if (freopen(errfile, "a", stderr) == NULL)
quit(2);
fprintf(stderr, "**************\n*** PID %5d: ",
getpid());
printargs(argc, argv, stderr);
putc('\n', stderr);
fflush(stderr);
}
#ifdef NICE
nice(NICE); /* lower priority */
#endif
/* get octree */
if (i == argc)
octname = NULL;
else if (i == argc-1)
octname = argv[i];
else
goto badopt;
if (seqstart > 0 && octname == NULL)
error(USER, "missing octree argument");
/* set up output */
#ifdef PERSIST
if (persist) {
if (recover != NULL)
error(USER, "persist option used with recover file");
if (seqstart <= 0)
error(USER, "persist option only for sequences");
if (outfile == NULL)
duped1 = dup(fileno(stdout)); /* don't lose our output */
openheader();
} else
#endif
if (outfile != NULL)
openheader();
#ifdef _WIN32
SET_FILE_BINARY(stdout);
if (octname == NULL)
SET_FILE_BINARY(stdin);
#endif
readoct(octname, loadflags, &thescene, NULL);
nsceneobjs = nobjects;
if (loadflags & IO_INFO) { /* print header */
printargs(i, argv, stdout);
printf("SOFTWARE= %s\n", VersionID);
}
marksources(); /* find and mark sources */
setambient(); /* initialize ambient calculation */
#ifdef PERSIST
if (persist) {
fflush(stdout);
if (outfile == NULL) { /* reconnect stdout */
dup2(duped1, fileno(stdout));
close(duped1);
}
if (persist == PARALLEL) { /* multiprocessing */
preload_objs(); /* preload scene */
shm_boundary = (char *)malloc(16);
strcpy(shm_boundary, "SHM_BOUNDARY");
while ((rval=fork()) == 0) { /* keep on forkin' */
pflock(1);
pfhold();
tstart = time((time_t *)NULL);
ambsync(); /* load new values */
}
if (rval < 0)
error(SYSTEM, "cannot fork child for persist function");
pfdetach(); /* parent will run then exit */
}
}
runagain:
if (persist) {
if (outfile == NULL) /* if out to stdout */
dupheader(); /* send header */
else /* if out to file */
duped1 = dup(fileno(stdout)); /* hang onto pipe */
}
#endif
/* batch render picture(s) */
rpict(seqstart, outfile, zfile, recover);
/* flush ambient file */
ambsync();
#ifdef PERSIST
if (persist == PERSIST) { /* first run-through */
if ((rval=fork()) == 0) { /* child loops until killed */
pflock(1);
persist = PCHILD;
} else { /* original process exits */
if (rval < 0)
error(SYSTEM, "cannot fork child for persist function");
pfdetach(); /* parent exits */
}
}
if (persist == PCHILD) { /* wait for a signal then go again */
if (outfile != NULL)
close(duped1); /* release output handle */
pfhold();
tstart = time((time_t *)NULL); /* reinitialize */
raynum = nrays = 0;
goto runagain;
}
#endif
quit(0);
badopt:
sprintf(errmsg, "command line error at '%s'", argv[i]);
error(USER, errmsg);
return 1; /* pro forma return */
#undef check
#undef bool
}