src/hd/rholo.c

#ifndef lint
static const char       RCSid[] = "$Id: rholo.c,v 3.55 2003/06/08 12:03:10 schorsch Exp $";
#endif
/*
 * Radiance holodeck generation controller
 */

#include "rholo.h"
#include "random.h"
#include <signal.h>
#include <sys/stat.h>

#ifndef FRAGWARN
#define FRAGWARN        20              /* fragmentation for warning (%) */
#endif
#ifndef MAXQTIME
#define MAXQTIME        5               /* target maximum seconds in queue */
#endif
                                        /* manual cache flushing frequency */
#ifndef RTFLUSH
#if MAXQTIME
#define RTFLUSH         (300/MAXQTIME*totqlen)  /* <= 5 minutes */
#else
#define RTFLUSH         (50*totqlen)            /* just guess */
#endif
#endif
                        /* the following must be consistent with rholo.h */
int     NVARS = NRHVARS;                /* total number of variables */

VARIABLE        vv[] = RHVINIT;         /* variable-value pairs */

char    *progname;              /* our program name */
char    *hdkfile;               /* holodeck file name */
char    froot[256];             /* root file name */

int     ncprocs = 0;            /* desired number of compute processes */

char    *outdev = NULL;         /* output device name */

int     readinp = 0;            /* read commands from stdin */

int     force = 0;              /* allow overwrite of holodeck (-1 == read-only) */

time_t  starttime;              /* time we got started */
time_t  endtime;                /* time we should end by */
time_t  reporttime;             /* time for next report */

off_t   maxdisk;                /* maximum file space (bytes) */

int     rtargc = 1;             /* rtrace command */
char    *rtargv[128] = {"rtrace", NULL};

int     orig_mode = -1;         /* original file mode (-1 if unchanged) */

long    nraysdone = 0L;         /* number of rays done */
long    npacksdone = 0L;        /* number of packets done */

PACKET  *freepacks;             /* available packets */
int     totqlen;                /* maximum queue length (number of packets) */

char  *sigerr[NSIG];            /* signal error messages */

extern int      nowarn;         /* turn warnings off? */

extern time_t   time();


main(argc, argv)
int     argc;
char    *argv[];
{
        int     i;

        initurand(16384);                       /* initialize urand */
        progname = argv[0];                     /* get arguments */
        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'w':                       /* turn off warnings */
                        nowarn++;
                        break;
                case 'f':                       /* force overwrite */
                        force = 1;
                        break;
                case 'r':                       /* read-only mode */
                        force = -1;
                        break;
                case 'i':                       /* read input from stdin */
                        readinp++;
                        break;
                case 'n':                       /* compute processes */
                        if (i >= argc-2)
                                goto userr;
                        ncprocs = atoi(argv[++i]);
                        break;
                case 'o':                       /* output display */
                        if (i >= argc-2)
                                goto userr;
                        outdev = argv[++i];
                        break;
                default:
                        goto userr;
                }
                                                /* get root file name */
        if (i >= argc)
                goto userr;
        rootname(froot, hdkfile=argv[i++]);
                                                /* load variables? */
        if (i < argc)
                if (argv[i][0] != '-' && argv[i][0] != '+')
                        loadvars(argv[i]);      /* load variables from file */

        if (i >= argc || argv[i][0] == '+')
                loadholo();                     /* load existing holodeck */

        while (++i < argc)                      /* get command line settings */
                if (setvariable(argv[i], matchvar) < 0) {
                        sprintf(errmsg, "unknown variable: %s", argv[i]);
                        error(USER, errmsg);
                }
                                                /* check settings */
        checkvalues();
                                                /* load rad input file */
        getradfile();

        if (hdlist[0] == NULL) {                /* create new holodeck */
                HDGRID  hdg[HDMAX];
                                                        /* set defaults */
                setdefaults(hdg);
                                                        /* check read-only */
                if (force < 0)
                        error(USER, "cannot create read-only holodeck");
                                                        /* holodeck exists? */
                if (!force && access(hdkfile, R_OK|W_OK) == 0)
                        error(USER,
                                "holodeck file exists -- use -f to overwrite");
                                                        /* create holodeck */
                creatholo(hdg);
        } else                                  /* else just set defaults */
                setdefaults(NULL);
                                                /* initialize */
        initrholo();
                                                /* main loop */
        while (rholo())
                ;
                                                /* done */
        quit(0);
userr:
        fprintf(stderr,
"Usage: %s [-n nprocs][-o disp][-w][-r|-f] output.hdk [control.hif|+|- [VAR=val ..]]\n",
                        progname);
        quit(1);
}


void
onsig(signo)                            /* fatal signal */
int  signo;
{
        static int  gotsig = 0;

        if (gotsig > 1)                 /* we're going as fast as we can! */
                return;
        if (gotsig++) {                 /* two signals and we split */
                hdsync(NULL, 0);        /* don't leave w/o saying goodbye */
                _exit(signo);
        }
        alarm(300);                     /* allow 5 minutes to clean up */
        eputs("signal - ");
        eputs(sigerr[signo]);
        eputs("\n");
        quit(3);
}


sigdie(signo, msg)                      /* set fatal signal */
int  signo;
char  *msg;
{
        if (signal(signo, onsig) == SIG_IGN)
                signal(signo, SIG_IGN);
        sigerr[signo] = msg;
}


int
resfmode(fd, mod)               /* restrict open file access mode */
int     fd, mod;
{
        struct stat     stbuf;
                                        /* get original mode */
        if (fstat(fd, &stbuf) < 0)
                error(SYSTEM, "cannot stat open holodeck file");
        mod &= stbuf.st_mode;           /* always more restrictive */
        if (mod == (stbuf.st_mode & 0777))
                return(-1);             /* already set */
                                        /* else change it */
        if (fchmod(fd, mod) < 0) {
                error(WARNING, "cannot change holodeck file access mode");
                return(-1);
        }
        return(stbuf.st_mode);          /* return original mode */
}


initrholo()                     /* get our holodeck running */
{
        extern int      global_packet();
        register int    i;
                                                /* close holodeck on exec() */
        fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);

        if (outdev != NULL)                     /* open output device */
                disp_open(outdev);
        else if (ncprocs > 0)                   /* else use global ray feed */
                init_global();
                                                /* record disk space limit */
        if (!vdef(DISKSPACE))
                maxdisk = (1L<<(sizeof(off_t)*8-2)) - 1024;
        else
                maxdisk = 1024.*1024.*vflt(DISKSPACE);
                                                /* set up memory cache */
        if (outdev == NULL)
                hdcachesize = 0;                /* manual flushing */
        else if (vdef(CACHE))
                hdcachesize = 1024.*1024.*vflt(CACHE);
                                                /* open report file */
        if (vdef(REPORT)) {
                register char   *s = sskip2(vval(REPORT), 1);
                if (*s && freopen(s, "a", stderr) == NULL)
                        quit(2);
        }
                                                /* mark the starting time */
        starttime = time(NULL);
                                                /* compute end time */
        if (!vdef(TIME) || vflt(TIME) <= FTINY)
                endtime = 0;
        else
                endtime = starttime + vflt(TIME)*3600. + .5;
                                                /* start rtrace */
        if (ncprocs > 0) {
                totqlen = i = start_rtrace();
                if (i < 1)
                        error(USER, "cannot start rtrace process(es)");
                if (vdef(REPORT)) {             /* make first report */
                        printargs(rtargc, rtargv, stderr);
                        report(0);
                }
                                                /* allocate packets */
                freepacks = (PACKET *)bmalloc(i*sizeof(PACKET));
                if (freepacks == NULL)
                        goto memerr;
                freepacks[--i].nr = 0;
                freepacks[i].next = NULL;
                if (!vdef(OBSTRUCTIONS) || !vbool(OBSTRUCTIONS)) {
                        freepacks[i].offset = (float *)bmalloc(
                                        RPACKSIZ*sizeof(float)*(i+1) );
                        if (freepacks[i].offset == NULL)
                                goto memerr;
                } else
                        freepacks[i].offset = NULL;
                while (i--) {
                        freepacks[i].nr = 0;
                        freepacks[i].offset = freepacks[i+1].offset == NULL ?
                                        NULL : freepacks[i+1].offset+RPACKSIZ ;
                        freepacks[i].next = &freepacks[i+1];
                }
        }
                                        /* set up signal handling */
        sigdie(SIGINT, "Interrupt");
        sigdie(SIGHUP, "Hangup");
        sigdie(SIGTERM, "Terminate");
        sigdie(SIGPIPE, "Broken pipe");
        sigdie(SIGALRM, "Alarm clock");
#ifdef  SIGXCPU
        sigdie(SIGXCPU, "CPU limit exceeded");
        sigdie(SIGXFSZ, "File size exceeded");
#endif
                                        /* protect holodeck file */
        orig_mode = resfmode(hdlist[0]->fd, ncprocs>0&force>=0 ? 0 : 0444);
        return;
memerr:
        error(SYSTEM, "out of memory in initrholo");
}


rholo()                         /* holodeck main loop */
{
        static long     nextfragwarn = 100*(1L<<20);
        static int      idle = 0;
        PACKET  *pl = NULL, *plend;
        off_t   fsiz;
        int     pksiz;
        register PACKET *p;
        time_t  t;
                                        /* check display */
        if (nprocs <= 0)
                idle = 1;
        if (outdev != NULL) {
                if (!disp_check(idle))
                        return(0);      /* quit request */
                if (nprocs <= 0)
                        return(1);
        } else if (idle)
                return(0);              /* all done */
        fsiz = hdfilen(hdlist[0]->fd);  /* check file size */
        if (maxdisk > 0 && fsiz >= maxdisk) {
                error(WARNING, "file limit exceeded");
                done_rtrace();
                return(1);      /* comes back */
        }
#if FRAGWARN
        if (fsiz >= nextfragwarn &&
                (fsiz-hdfiluse(hdlist[0]->fd,0))/(fsiz/100) > FRAGWARN) {
                sprintf(errmsg, "holodeck file fragmentation is %.0f%%",
                                100.*(fsiz-hdfiluse(hdlist[0]->fd,1))/fsiz);
                error(WARNING, errmsg);
                nextfragwarn = fsiz + (fsiz>>2);        /* decent interval */
        }
#endif
        t = time(NULL);                 /* check time */
        if (endtime > 0 && t >= endtime) {
                error(WARNING, "time limit exceeded");
                done_rtrace();
                return(1);      /* comes back */
        }
        if (reporttime > 0 && t >= reporttime)
                report(t);
                                        /* figure out good packet size */
        pksiz = RPACKSIZ;
#if MAXQTIME
        if (!chunkycmp) {
                pksiz = nraysdone*MAXQTIME/(totqlen*(t - starttime + 1L));
                if (pksiz < 1) pksiz = 1;
                else if (pksiz > RPACKSIZ) pksiz = RPACKSIZ;
        }
#endif
        idle = 0;                       /* get packets to process */
        while (freepacks != NULL) {
                p = freepacks; freepacks = p->next; p->next = NULL;
                if (!next_packet(p, pksiz)) {
                        p->next = freepacks; freepacks = p;
                        idle = 1;
                        break;
                }
                if (pl == NULL) pl = p;
                else plend->next = p;
                plend = p;
        }
                                        /* process packets */
        done_packets(do_packets(pl));
        return(1);                      /* and continue */
}


setdefaults(gp)                 /* set default values */
register HDGRID *gp;
{
        extern char     *atos();
        register int    i;
        int     n;
        double  len[3], d;
        char    buf[64];

        if (!vdef(SECTION)) {
                sprintf(errmsg, "%s must be defined", vnam(SECTION));
                error(USER, errmsg);
        }
        if (!vdef(OCTREE)) {
                if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
                        error(SYSTEM, "out of memory");
                sprintf(vval(OCTREE), "%s.oct", froot);
                vdef(OCTREE)++;
        }
        if (!vdef(VDIST)) {
                vval(VDIST) = "F";
                vdef(VDIST)++;
        }
                                /* append rendering options */
        if (vdef(RENDER))
                rtargc += wordstring(rtargv+rtargc, vval(RENDER));
        
        if (gp == NULL)         /* already initialized? */
                return;
                                /* set grid parameters */
        for (n = 0; n < vdef(SECTION); n++, gp++) {
                gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
                if (sscanf(nvalue(SECTION, n),
                "%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
                                &gp->orig[0], &gp->orig[1], &gp->orig[2],
                                &gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
                                &gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
                                &gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2],
                                &gp->grid[0], &gp->grid[1], &gp->grid[2]) < 12)
                        badvalue(SECTION);
                for (i = 0; i < 3; i++)
                        len[i] = VLEN(gp->xv[i]);
                if (!vdef(GRID)) {
                        d = 2/2e5*( len[0]*len[0]*(len[1]*len[1] +
                                        len[2]*len[2] + 4*len[1]*len[2])
                                + len[1]*len[1]*len[2]*(len[2] + 4*len[0])
                                + 4*len[0]*len[1]*len[2]*len[2] );
                        d = sqrt(sqrt(d));
                } else if ((d = vflt(GRID)) <= FTINY)
                        badvalue(GRID);
                for (i = 0; i < 3; i++)
                        if (gp->grid[i] <= 0)
                                gp->grid[i] = len[i]/d + (1.-FTINY);
        }
}


creatholo(gp)                   /* create a holodeck output file */
HDGRID  *gp;
{
        extern char     VersionID[];
        int4    lastloc, nextloc;
        int     n;
        int     fd;
        FILE    *fp;
                                        /* open & truncate file */
        if ((fp = fopen(hdkfile, "w+")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
                error(SYSTEM, errmsg);
        }
                                        /* write information header */
        newheader("RADIANCE", fp);
        fprintf(fp, "SOFTWARE= %s\n", VersionID);
        printvars(fp);
        fputformat(HOLOFMT, fp);
        fputc('\n', fp);
        putw(HOLOMAGIC, fp);            /* put magic number */
        fd = dup(fileno(fp));
        fclose(fp);                     /* flush and close stdio stream */
        lastloc = lseek(fd, (off_t)0, 2);
        for (n = vdef(SECTION); n--; gp++) {    /* initialize each section */
                nextloc = 0L;
                write(fd, (char *)&nextloc, sizeof(nextloc));
                hdinit(fd, gp);                 /* writes beam index */
                if (!n)
                        break;
                nextloc = hdfilen(fd);          /* write section pointer */
                if (lseek(fd, (off_t)lastloc, 0) < 0)
                        error(SYSTEM,
                                "cannot seek on holodeck file in creatholo");
                write(fd, (char *)&nextloc, sizeof(nextloc));
                lseek(fd, (off_t)(lastloc=nextloc), 0);
        }
}


int
headline(s)                     /* process information header line */
char    *s;
{
        extern char     FMTSTR[];
        register char   *cp;
        char    fmt[32];

        if (formatval(fmt, s)) {
                if (strcmp(fmt, HOLOFMT)) {
                        sprintf(errmsg, "%s file \"%s\" has %s%s",
                                        HOLOFMT, hdkfile, FMTSTR, fmt);
                        error(USER, errmsg);
                }
                return(0);
        }
        for (cp = s; *cp; cp++)         /* take off any comments */
                if (*cp == '#') {
                        *cp = '\0';
                        break;
                }
        setvariable(s, matchvar);       /* don't flag errors */
        return(0);
}


loadholo()                      /* start loading a holodeck from fname */
{
        FILE    *fp;
        int     fd;
        int     n;
        int4    nextloc;
        
        if (ncprocs > 0 & force >= 0)
                fp = fopen(hdkfile, "r+");
        else
                fp = NULL;
        if (fp == NULL) {
                if ((fp = fopen(hdkfile, "r")) == NULL) {
                        sprintf(errmsg, "cannot open \"%s\"", hdkfile);
                        error(SYSTEM, errmsg);
                }
                if (ncprocs > 0) {
                        sprintf(errmsg,
                        "\"%s\" opened read-only; new rays will be discarded",
                                        hdkfile);
                        error(WARNING, errmsg);
                        force = -1;
                }
        }
                                        /* load variables from header */
        getheader(fp, headline, NULL);
                                        /* check magic number */
        if (getw(fp) != HOLOMAGIC) {
                sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
                                hdkfile);
                error(USER, errmsg);
        }
        nextloc = ftell(fp);                    /* get stdio position */
        fd = dup(fileno(fp));
        fclose(fp);                             /* done with stdio */
        for (n = 0; nextloc > 0L; n++) {        /* initialize each section */
                lseek(fd, (off_t)nextloc, 0);
                read(fd, (char *)&nextloc, sizeof(nextloc));
                hdinit(fd, NULL);
        }
        if (n != vdef(SECTION)) {
                sprintf(errmsg, "number of sections does not match %s setting",
                                vnam(SECTION));
                error(WARNING, errmsg);
        }
}


done_packets(pl)                /* handle finished packets */
PACKET  *pl;
{
        static int      n2flush = 0;
        register PACKET *p;

        while (pl != NULL) {
                p = pl; pl = p->next; p->next = NULL;
                if (p->nr > 0) {                /* add to holodeck */
                        bcopy((void *)p->ra,
                                (void *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
                                p->nr*sizeof(RAYVAL));
                        if (outdev != NULL)     /* display it */
                                disp_packet((PACKHEAD *)p);
                        if (hdcachesize <= 0)
                                n2flush++;
                        nraysdone += p->nr;
                        npacksdone++;
                        p->nr = 0;
                }
                p->next = freepacks;            /* push onto free list */
                freepacks = p;
        }
        if (n2flush >= RTFLUSH) {
                if (outdev != NULL)
                        hdsync(NULL, 1);
                else
                        hdflush(NULL);
                n2flush = 0;
        }
}


rootname(rn, fn)                /* remove tail from end of fn */
register char   *rn, *fn;
{
        char    *tp, *dp;

        for (tp = NULL, dp = rn; *rn = *fn++; rn++)
                if (*rn == '/')
                        dp = rn;
                else if (*rn == '.')
                        tp = rn;
        if (tp != NULL && tp > dp)
                *tp = '\0';
}


badvalue(vc)                    /* report bad variable value and exit */
int     vc;
{
        sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
        error(USER, errmsg);
}


void
eputs(s)                        /* put error message to stderr */
register char  *s;
{
        static int  midline = 0;

        if (!*s)
                return;
        if (!midline++) {       /* prepend line with program name */
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (s[strlen(s)-1] == '\n') {
                fflush(stderr);
                midline = 0;
        }
}


void
quit(ec)                        /* exit program gracefully */
int     ec;
{
        int     status = 0;

        if (hdlist[0] != NULL) {        /* close holodeck */
                if (nprocs > 0)
                        status = done_rtrace();         /* calls hdsync() */
                if (ncprocs > 0 & force >= 0 && vdef(REPORT)) {
                        off_t   fsiz, fuse;
                        fsiz = hdfilen(hdlist[0]->fd);
                        fuse = hdfiluse(hdlist[0]->fd, 1);
                        fprintf(stderr,
                        "%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
                                        hdkfile, fsiz/(1024.*1024.),
                                        100.*(fsiz-fuse)/fsiz);
                }
        }
        if (orig_mode >= 0)             /* reset holodeck access mode */
                fchmod(hdlist[0]->fd, orig_mode);
        if (outdev != NULL)             /* close display */
                disp_close();
        exit(ec ? ec : status);         /* exit */
}
Revision:	3.56
Committed:	Fri Jun 13 15:27:04 2003 UTC (21 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 3.55:	+2 -2 lines
Log Message:	Type fixing to lseek() call
#	User	Rev	Content
1	gregl	3.1	#ifndef lint
2	greg	3.56	static const char RCSid[] = "$Id: rholo.c,v 3.55 2003/06/08 12:03:10 schorsch Exp $";
3	gregl	3.1	#endif
4			/*
5			* Radiance holodeck generation controller
6			*/
7
8			#include "rholo.h"
9	gregl	3.14	#include "random.h"
10	gregl	3.12	#include <signal.h>
11			#include <sys/stat.h>
12	gregl	3.1
13	gwlarson	3.44	#ifndef FRAGWARN
14			#define FRAGWARN 20 /* fragmentation for warning (%) */
15			#endif
16	gregl	3.33	#ifndef MAXQTIME
17			#define MAXQTIME 5 /* target maximum seconds in queue */
18			#endif
19	gwlarson	3.49	/* manual cache flushing frequency */
20			#ifndef RTFLUSH
21			#if MAXQTIME
22			#define RTFLUSH (300/MAXQTIMEtotqlen) / <= 5 minutes */
23			#else
24			#define RTFLUSH (50totqlen) / just guess */
25			#endif
26			#endif
27	gregl	3.1	/* the following must be consistent with rholo.h */
28			int NVARS = NRHVARS; /* total number of variables */
29
30			VARIABLE vv[] = RHVINIT; /* variable-value pairs */
31
32			char progname; / our program name */
33			char hdkfile; / holodeck file name */
34	gregl	3.22	char froot[256]; /* root file name */
35	gregl	3.1
36			int ncprocs = 0; /* desired number of compute processes */
37
38			char outdev = NULL; / output device name */
39
40	gregl	3.17	int readinp = 0; /* read commands from stdin */
41
42	gwlarson	3.51	int force = 0; /* allow overwrite of holodeck (-1 == read-only) */
43	gregl	3.20
44	gregl	3.1	time_t starttime; /* time we got started */
45			time_t endtime; /* time we should end by */
46			time_t reporttime; /* time for next report */
47
48	greg	3.54	off_t maxdisk; /* maximum file space (bytes) */
49	gregl	3.8
50	gregl	3.1	int rtargc = 1; /* rtrace command */
51			char *rtargv[128] = {"rtrace", NULL};
52
53	gregl	3.12	int orig_mode = -1; /* original file mode (-1 if unchanged) */
54
55	gregl	3.1	long nraysdone = 0L; /* number of rays done */
56			long npacksdone = 0L; /* number of packets done */
57
58			PACKET freepacks; / available packets */
59	gwlarson	3.49	int totqlen; /* maximum queue length (number of packets) */
60	gregl	3.1
61	gregl	3.12	char sigerr[NSIG]; / signal error messages */
62
63	gwlarson	3.40	extern int nowarn; /* turn warnings off? */
64
65	gregl	3.1	extern time_t time();
66
67
68			main(argc, argv)
69			int argc;
70			char *argv[];
71			{
72			int i;
73	gregl	3.33
74	gregl	3.18	initurand(16384); /* initialize urand */
75	gregl	3.1	progname = argv[0]; /* get arguments */
76			for (i = 1; i < argc && argv[i][0] == '-'; i++)
77			switch (argv[i][1]) {
78			case 'w': /* turn off warnings */
79			nowarn++;
80			break;
81			case 'f': /* force overwrite */
82	gwlarson	3.51	force = 1;
83	gregl	3.1	break;
84	gwlarson	3.51	case 'r': /* read-only mode */
85			force = -1;
86			break;
87	gregl	3.17	case 'i': /* read input from stdin */
88			readinp++;
89			break;
90	gregl	3.1	case 'n': /* compute processes */
91			if (i >= argc-2)
92			goto userr;
93			ncprocs = atoi(argv[++i]);
94			break;
95			case 'o': /* output display */
96			if (i >= argc-2)
97			goto userr;
98			outdev = argv[++i];
99			break;
100			default:
101			goto userr;
102			}
103			/* get root file name */
104	gregl	3.32	if (i >= argc)
105			goto userr;
106	gregl	3.1	rootname(froot, hdkfile=argv[i++]);
107	gregl	3.27	/* load variables? */
108			if (i < argc)
109			if (argv[i][0] != '-' && argv[i][0] != '+')
110			loadvars(argv[i]); /* load variables from file */
111
112			if (i >= argc \|\| argv[i][0] == '+')
113			loadholo(); /* load existing holodeck */
114
115			while (++i < argc) /* get command line settings */
116			if (setvariable(argv[i], matchvar) < 0) {
117			sprintf(errmsg, "unknown variable: %s", argv[i]);
118			error(USER, errmsg);
119			}
120			/* check settings */
121			checkvalues();
122	gregl	3.36	/* load rad input file */
123			getradfile();
124	gregl	3.27
125	gregl	3.28	if (hdlist[0] == NULL) { /* create new holodeck */
126	gregl	3.29	HDGRID hdg[HDMAX];
127	gregl	3.1	/* set defaults */
128	gregl	3.29	setdefaults(hdg);
129	gwlarson	3.51	/* check read-only */
130			if (force < 0)
131			error(USER, "cannot create read-only holodeck");
132	gregl	3.1	/* holodeck exists? */
133			if (!force && access(hdkfile, R_OK\|W_OK) == 0)
134			error(USER,
135			"holodeck file exists -- use -f to overwrite");
136			/* create holodeck */
137	gregl	3.29	creatholo(hdg);
138	gregl	3.27	} else /* else just set defaults */
139	gregl	3.15	setdefaults(NULL);
140	gregl	3.1	/* initialize */
141			initrholo();
142	gregl	3.15	/* main loop */
143	gregl	3.1	while (rholo())
144			;
145			/* done */
146			quit(0);
147			userr:
148			fprintf(stderr,
149	gwlarson	3.51	"Usage: %s [-n nprocs][-o disp][-w][-r\|-f] output.hdk [control.hif\|+\|- [VAR=val ..]]\n",
150	gregl	3.1	progname);
151			quit(1);
152			}
153
154
155	schorsch	3.55	void
156	gregl	3.12	onsig(signo) /* fatal signal */
157			int signo;
158			{
159			static int gotsig = 0;
160
161	gwlarson	3.47	if (gotsig > 1) /* we're going as fast as we can! */
162			return;
163			if (gotsig++) { /* two signals and we split */
164			hdsync(NULL, 0); /* don't leave w/o saying goodbye */
165	gregl	3.12	_exit(signo);
166	gwlarson	3.47	}
167			alarm(300); /* allow 5 minutes to clean up */
168	gregl	3.12	eputs("signal - ");
169			eputs(sigerr[signo]);
170			eputs("\n");
171			quit(3);
172			}
173
174
175			sigdie(signo, msg) /* set fatal signal */
176			int signo;
177			char *msg;
178			{
179			if (signal(signo, onsig) == SIG_IGN)
180			signal(signo, SIG_IGN);
181			sigerr[signo] = msg;
182			}
183
184
185			int
186			resfmode(fd, mod) /* restrict open file access mode */
187			int fd, mod;
188			{
189			struct stat stbuf;
190			/* get original mode */
191			if (fstat(fd, &stbuf) < 0)
192			error(SYSTEM, "cannot stat open holodeck file");
193			mod &= stbuf.st_mode; /* always more restrictive */
194	gregl	3.35	if (mod == (stbuf.st_mode & 0777))
195	gregl	3.12	return(-1); /* already set */
196			/* else change it */
197			if (fchmod(fd, mod) < 0) {
198			error(WARNING, "cannot change holodeck file access mode");
199			return(-1);
200			}
201			return(stbuf.st_mode); /* return original mode */
202			}
203
204
205	gregl	3.1	initrholo() /* get our holodeck running */
206			{
207			extern int global_packet();
208			register int i;
209	gregl	3.17	/* close holodeck on exec() */
210			fcntl(hdlist[0]->fd, F_SETFD, FD_CLOEXEC);
211	gregl	3.4
212			if (outdev != NULL) /* open output device */
213			disp_open(outdev);
214	gregl	3.1	else if (ncprocs > 0) /* else use global ray feed */
215			init_global();
216	gregl	3.8	/* record disk space limit */
217			if (!vdef(DISKSPACE))
218	greg	3.54	maxdisk = (1L<<(sizeof(off_t)*8-2)) - 1024;
219	gregl	3.8	else
220	gregl	3.9	maxdisk = 1024.1024.vflt(DISKSPACE);
221	gregl	3.1	/* set up memory cache */
222	gregl	3.5	if (outdev == NULL)
223	gwlarson	3.50	hdcachesize = 0; /* manual flushing */
224	gregl	3.5	else if (vdef(CACHE))
225			hdcachesize = 1024.1024.vflt(CACHE);
226	gregl	3.1	/* open report file */
227			if (vdef(REPORT)) {
228			register char *s = sskip2(vval(REPORT), 1);
229			if (*s && freopen(s, "a", stderr) == NULL)
230			quit(2);
231			}
232	gregl	3.33	/* mark the starting time */
233			starttime = time(NULL);
234			/* compute end time */
235			if (!vdef(TIME) \|\| vflt(TIME) <= FTINY)
236			endtime = 0;
237			else
238			endtime = starttime + vflt(TIME)*3600. + .5;
239	gregl	3.1	/* start rtrace */
240			if (ncprocs > 0) {
241	gwlarson	3.38	totqlen = i = start_rtrace();
242	gregl	3.1	if (i < 1)
243	gregl	3.20	error(USER, "cannot start rtrace process(es)");
244	gregl	3.1	if (vdef(REPORT)) { /* make first report */
245			printargs(rtargc, rtargv, stderr);
246			report(0);
247			}
248			/* allocate packets */
249			freepacks = (PACKET )bmalloc(isizeof(PACKET));
250			if (freepacks == NULL)
251			goto memerr;
252			freepacks[--i].nr = 0;
253			freepacks[i].next = NULL;
254	gregl	3.25	if (!vdef(OBSTRUCTIONS) \|\| !vbool(OBSTRUCTIONS)) {
255	gregl	3.1	freepacks[i].offset = (float *)bmalloc(
256			RPACKSIZsizeof(float)(i+1) );
257			if (freepacks[i].offset == NULL)
258			goto memerr;
259			} else
260			freepacks[i].offset = NULL;
261			while (i--) {
262			freepacks[i].nr = 0;
263			freepacks[i].offset = freepacks[i+1].offset == NULL ?
264			NULL : freepacks[i+1].offset+RPACKSIZ ;
265			freepacks[i].next = &freepacks[i+1];
266			}
267			}
268	gregl	3.12	/* set up signal handling */
269			sigdie(SIGINT, "Interrupt");
270			sigdie(SIGHUP, "Hangup");
271			sigdie(SIGTERM, "Terminate");
272			sigdie(SIGPIPE, "Broken pipe");
273			sigdie(SIGALRM, "Alarm clock");
274			#ifdef SIGXCPU
275			sigdie(SIGXCPU, "CPU limit exceeded");
276			sigdie(SIGXFSZ, "File size exceeded");
277			#endif
278	gwlarson	3.50	/* protect holodeck file */
279	greg	3.52	orig_mode = resfmode(hdlist[0]->fd, ncprocs>0&force>=0 ? 0 : 0444);
280	gregl	3.1	return;
281			memerr:
282			error(SYSTEM, "out of memory in initrholo");
283			}
284
285
286			rholo() /* holodeck main loop */
287			{
288	gwlarson	3.44	static long nextfragwarn = 100*(1L<<20);
289	gregl	3.30	static int idle = 0;
290	gregl	3.1	PACKET pl = NULL, plend;
291	greg	3.54	off_t fsiz;
292	gregl	3.33	int pksiz;
293	gregl	3.1	register PACKET *p;
294			time_t t;
295	gregl	3.30	/* check display */
296			if (nprocs <= 0)
297			idle = 1;
298			if (outdev != NULL) {
299	gregl	3.4	if (!disp_check(idle))
300	gregl	3.30	return(0); /* quit request */
301			if (nprocs <= 0)
302			return(1);
303			} else if (idle)
304			return(0); /* all done */
305	gwlarson	3.44	fsiz = hdfilen(hdlist[0]->fd); /* check file size */
306			if (maxdisk > 0 && fsiz >= maxdisk) {
307	gregl	3.8	error(WARNING, "file limit exceeded");
308	gregl	3.21	done_rtrace();
309			return(1); /* comes back */
310	gregl	3.8	}
311	gwlarson	3.44	#if FRAGWARN
312			if (fsiz >= nextfragwarn &&
313			(fsiz-hdfiluse(hdlist[0]->fd,0))/(fsiz/100) > FRAGWARN) {
314			sprintf(errmsg, "holodeck file fragmentation is %.0f%%",
315			100.*(fsiz-hdfiluse(hdlist[0]->fd,1))/fsiz);
316			error(WARNING, errmsg);
317			nextfragwarn = fsiz + (fsiz>>2); /* decent interval */
318			}
319			#endif
320	gregl	3.33	t = time(NULL); /* check time */
321	gregl	3.8	if (endtime > 0 && t >= endtime) {
322			error(WARNING, "time limit exceeded");
323	gregl	3.21	done_rtrace();
324			return(1); /* comes back */
325	gregl	3.8	}
326	gregl	3.3	if (reporttime > 0 && t >= reporttime)
327	gregl	3.1	report(t);
328	gregl	3.33	/* figure out good packet size */
329	gwlarson	3.48	pksiz = RPACKSIZ;
330	gregl	3.33	#if MAXQTIME
331	gwlarson	3.48	if (!chunkycmp) {
332			pksiz = nraysdoneMAXQTIME/(totqlen(t - starttime + 1L));
333			if (pksiz < 1) pksiz = 1;
334			else if (pksiz > RPACKSIZ) pksiz = RPACKSIZ;
335			}
336	gregl	3.33	#endif
337	gregl	3.28	idle = 0; /* get packets to process */
338	gregl	3.1	while (freepacks != NULL) {
339			p = freepacks; freepacks = p->next; p->next = NULL;
340	gregl	3.33	if (!next_packet(p, pksiz)) {
341	gregl	3.1	p->next = freepacks; freepacks = p;
342	gregl	3.21	idle = 1;
343	gregl	3.1	break;
344			}
345			if (pl == NULL) pl = p;
346			else plend->next = p;
347			plend = p;
348			}
349	gregl	3.21	/* process packets */
350	gregl	3.1	done_packets(do_packets(pl));
351			return(1); /* and continue */
352			}
353
354
355			setdefaults(gp) /* set default values */
356			register HDGRID *gp;
357			{
358			extern char *atos();
359			register int i;
360	gregl	3.29	int n;
361	gregl	3.37	double len[3], d;
362	gregl	3.1	char buf[64];
363
364			if (!vdef(SECTION)) {
365			sprintf(errmsg, "%s must be defined", vnam(SECTION));
366			error(USER, errmsg);
367			}
368			if (!vdef(OCTREE)) {
369			if ((vval(OCTREE) = bmalloc(strlen(froot)+5)) == NULL)
370			error(SYSTEM, "out of memory");
371			sprintf(vval(OCTREE), "%s.oct", froot);
372			vdef(OCTREE)++;
373	gregl	3.14	}
374			if (!vdef(VDIST)) {
375			vval(VDIST) = "F";
376			vdef(VDIST)++;
377	gregl	3.1	}
378			/* append rendering options */
379			if (vdef(RENDER))
380			rtargc += wordstring(rtargv+rtargc, vval(RENDER));
381	gregl	3.15
382			if (gp == NULL) /* already initialized? */
383			return;
384			/* set grid parameters */
385	gregl	3.29	for (n = 0; n < vdef(SECTION); n++, gp++) {
386			gp->grid[0] = gp->grid[1] = gp->grid[2] = 0;
387			if (sscanf(nvalue(SECTION, n),
388	gregl	3.16	"%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %hd %hd %hd",
389	gregl	3.29	&gp->orig[0], &gp->orig[1], &gp->orig[2],
390			&gp->xv[0][0], &gp->xv[0][1], &gp->xv[0][2],
391			&gp->xv[1][0], &gp->xv[1][1], &gp->xv[1][2],
392			&gp->xv[2][0], &gp->xv[2][1], &gp->xv[2][2],
393			&gp->grid[0], &gp->grid[1], &gp->grid[2]) < 12)
394			badvalue(SECTION);
395			for (i = 0; i < 3; i++)
396	gregl	3.37	len[i] = VLEN(gp->xv[i]);
397			if (!vdef(GRID)) {
398	gwlarson	3.43	d = 2/2e5( len[0]len[0](len[1]len[1] +
399	gregl	3.37	len[2]len[2] + 4len[1]*len[2])
400			+ len[1]len[1]len[2](len[2] + 4len[0])
401			+ 4len[0]len[1]len[2]len[2] );
402			d = sqrt(sqrt(d));
403			} else if ((d = vflt(GRID)) <= FTINY)
404	gregl	3.29	badvalue(GRID);
405			for (i = 0; i < 3; i++)
406			if (gp->grid[i] <= 0)
407			gp->grid[i] = len[i]/d + (1.-FTINY);
408	gregl	3.15	}
409	gregl	3.1	}
410
411
412			creatholo(gp) /* create a holodeck output file */
413			HDGRID *gp;
414			{
415	gregl	3.12	extern char VersionID[];
416	gregl	3.29	int4 lastloc, nextloc;
417			int n;
418	gregl	3.10	int fd;
419	gregl	3.1	FILE *fp;
420			/* open & truncate file */
421			if ((fp = fopen(hdkfile, "w+")) == NULL) {
422			sprintf(errmsg, "cannot open \"%s\" for writing", hdkfile);
423			error(SYSTEM, errmsg);
424			}
425			/* write information header */
426			newheader("RADIANCE", fp);
427	gregl	3.12	fprintf(fp, "SOFTWARE= %s\n", VersionID);
428	gregl	3.1	printvars(fp);
429			fputformat(HOLOFMT, fp);
430			fputc('\n', fp);
431	gregl	3.29	putw(HOLOMAGIC, fp); /* put magic number */
432	gregl	3.10	fd = dup(fileno(fp));
433			fclose(fp); /* flush and close stdio stream */
434	greg	3.56	lastloc = lseek(fd, (off_t)0, 2);
435	gregl	3.29	for (n = vdef(SECTION); n--; gp++) { /* initialize each section */
436			nextloc = 0L;
437			write(fd, (char *)&nextloc, sizeof(nextloc));
438			hdinit(fd, gp); /* writes beam index */
439			if (!n)
440			break;
441			nextloc = hdfilen(fd); /* write section pointer */
442	greg	3.52	if (lseek(fd, (off_t)lastloc, 0) < 0)
443	gregl	3.29	error(SYSTEM,
444			"cannot seek on holodeck file in creatholo");
445			write(fd, (char *)&nextloc, sizeof(nextloc));
446	greg	3.52	lseek(fd, (off_t)(lastloc=nextloc), 0);
447	gregl	3.29	}
448	gregl	3.1	}
449
450
451	gwlarson	3.42	int
452	gregl	3.1	headline(s) /* process information header line */
453			char *s;
454			{
455			extern char FMTSTR[];
456			register char *cp;
457			char fmt[32];
458
459	gregl	3.2	if (formatval(fmt, s)) {
460	gregl	3.1	if (strcmp(fmt, HOLOFMT)) {
461			sprintf(errmsg, "%s file \"%s\" has %s%s",
462			HOLOFMT, hdkfile, FMTSTR, fmt);
463			error(USER, errmsg);
464			}
465	gwlarson	3.42	return(0);
466	gregl	3.1	}
467			for (cp = s; cp; cp++) / take off any comments */
468			if (*cp == '#') {
469			*cp = '\0';
470			break;
471			}
472			setvariable(s, matchvar); /* don't flag errors */
473	gwlarson	3.42	return(0);
474	gregl	3.1	}
475
476
477			loadholo() /* start loading a holodeck from fname */
478			{
479			FILE *fp;
480	gregl	3.10	int fd;
481	gregl	3.29	int n;
482			int4 nextloc;
483	gwlarson	3.51
484			if (ncprocs > 0 & force >= 0)
485			fp = fopen(hdkfile, "r+");
486			else
487			fp = NULL;
488			if (fp == NULL) {
489			if ((fp = fopen(hdkfile, "r")) == NULL) {
490			sprintf(errmsg, "cannot open \"%s\"", hdkfile);
491			error(SYSTEM, errmsg);
492			}
493			if (ncprocs > 0) {
494			sprintf(errmsg,
495			"\"%s\" opened read-only; new rays will be discarded",
496			hdkfile);
497			error(WARNING, errmsg);
498			force = -1;
499			}
500	gregl	3.1	}
501			/* load variables from header */
502			getheader(fp, headline, NULL);
503			/* check magic number */
504			if (getw(fp) != HOLOMAGIC) {
505			sprintf(errmsg, "bad magic number in holodeck file \"%s\"",
506			hdkfile);
507			error(USER, errmsg);
508			}
509	gregl	3.29	nextloc = ftell(fp); /* get stdio position */
510	gregl	3.10	fd = dup(fileno(fp));
511			fclose(fp); /* done with stdio */
512	gregl	3.29	for (n = 0; nextloc > 0L; n++) { /* initialize each section */
513	greg	3.52	lseek(fd, (off_t)nextloc, 0);
514	gregl	3.29	read(fd, (char *)&nextloc, sizeof(nextloc));
515			hdinit(fd, NULL);
516			}
517			if (n != vdef(SECTION)) {
518			sprintf(errmsg, "number of sections does not match %s setting",
519			vnam(SECTION));
520			error(WARNING, errmsg);
521			}
522	gregl	3.1	}
523
524
525			done_packets(pl) /* handle finished packets */
526			PACKET *pl;
527			{
528	gregl	3.13	static int n2flush = 0;
529	gregl	3.1	register PACKET *p;
530
531			while (pl != NULL) {
532			p = pl; pl = p->next; p->next = NULL;
533			if (p->nr > 0) { /* add to holodeck */
534	greg	3.53	bcopy((void *)p->ra,
535			(void *)hdnewrays(hdlist[p->hd],p->bi,p->nr),
536	gregl	3.1	p->nr*sizeof(RAYVAL));
537			if (outdev != NULL) /* display it */
538	gregl	3.7	disp_packet((PACKHEAD *)p);
539	gwlarson	3.49	if (hdcachesize <= 0)
540	gregl	3.33	n2flush++;
541	gregl	3.6	nraysdone += p->nr;
542			npacksdone++;
543	gregl	3.33	p->nr = 0;
544	gregl	3.1	}
545	gregl	3.33	p->next = freepacks; /* push onto free list */
546	gregl	3.1	freepacks = p;
547	gregl	3.5	}
548	gwlarson	3.50	if (n2flush >= RTFLUSH) {
549	gwlarson	3.46	if (outdev != NULL)
550			hdsync(NULL, 1);
551	gwlarson	3.41	else
552	gwlarson	3.46	hdflush(NULL);
553	gregl	3.13	n2flush = 0;
554	gregl	3.1	}
555			}
556
557
558			rootname(rn, fn) /* remove tail from end of fn */
559			register char rn, fn;
560			{
561			char tp, dp;
562
563			for (tp = NULL, dp = rn; rn = fn++; rn++)
564	gregl	3.22	if (*rn == '/')
565	gregl	3.1	dp = rn;
566			else if (*rn == '.')
567			tp = rn;
568			if (tp != NULL && tp > dp)
569			*tp = '\0';
570			}
571
572
573			badvalue(vc) /* report bad variable value and exit */
574			int vc;
575			{
576			sprintf(errmsg, "bad value for variable '%s'", vnam(vc));
577			error(USER, errmsg);
578			}
579
580
581	greg	3.52	void
582	gregl	3.1	eputs(s) /* put error message to stderr */
583			register char *s;
584			{
585			static int midline = 0;
586
587			if (!*s)
588			return;
589			if (!midline++) { /* prepend line with program name */
590			fputs(progname, stderr);
591			fputs(": ", stderr);
592			}
593			fputs(s, stderr);
594			if (s[strlen(s)-1] == '\n') {
595			fflush(stderr);
596			midline = 0;
597			}
598			}
599
600
601	greg	3.52	void
602	gregl	3.1	quit(ec) /* exit program gracefully */
603			int ec;
604			{
605			int status = 0;
606
607	gregl	3.24	if (hdlist[0] != NULL) { /* close holodeck */
608	gregl	3.21	if (nprocs > 0)
609	gregl	3.24	status = done_rtrace(); /* calls hdsync() */
610	gwlarson	3.51	if (ncprocs > 0 & force >= 0 && vdef(REPORT)) {
611	greg	3.54	off_t fsiz, fuse;
612	gregl	3.19	fsiz = hdfilen(hdlist[0]->fd);
613			fuse = hdfiluse(hdlist[0]->fd, 1);
614			fprintf(stderr,
615	gregl	3.3	"%s: %.1f Mbyte holodeck file, %.1f%% fragmentation\n",
616	gregl	3.19	hdkfile, fsiz/(1024.*1024.),
617			100.*(fsiz-fuse)/fsiz);
618			}
619	gregl	3.1	}
620	gregl	3.12	if (orig_mode >= 0) /* reset holodeck access mode */
621			fchmod(hdlist[0]->fd, orig_mode);
622	gregl	3.11	if (outdev != NULL) /* close display */
623			disp_close();
624	gregl	3.1	exit(ec ? ec : status); /* exit */
625			}