src/rt/rtmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rtmain.c,v 2.41 2023/02/02 18:55:09 greg Exp $";
#endif
/*
 *  rtmain.c - main for rtrace per-ray calculation program
 */

#include "copyright.h"

#include  <signal.h>

#include  "platform.h"
#include  "rtprocess.h" /* getpid() */
#include  "resolu.h"
#include  "ray.h"
#include  "source.h"
#include  "ambient.h"
#include  "random.h"
#include  "paths.h"
#include  "pmapray.h"

extern char     *progname;              /* global argv[0] */

extern char     *shm_boundary;          /* boundary of shared memory */

                                        /* persistent processes define */
#ifdef  F_SETLKW
#define  PERSIST        1               /* normal persist */
#define  PARALLEL       2               /* parallel persist */
#define  PCHILD         3               /* child of normal persist */
#endif

char  *sigerr[NSIG];                    /* signal error messages */
char  *errfile = NULL;                  /* error output file */

int  nproc = 1;                         /* number of processes */

extern char  *formstr(int f);           /* string from format */
extern int  setrtoutput(void);          /* set output values */

int  inform = 'a';                      /* input format */
int  outform = 'a';                     /* output format */
char  *outvals = "v";                   /* output specification */

int  hresolu = 0;                       /* horizontal (scan) size */
int  vresolu = 0;                       /* vertical resolution */

extern int  castonly;                   /* only doing ray-casting? */

int  imm_irrad = 0;                     /* compute immediate irradiance? */
int  lim_dist = 0;                      /* limit distance? */

#ifndef MAXMODLIST
#define MAXMODLIST      1024            /* maximum modifiers we'll track */
#endif

extern void  (*addobjnotify[])();       /* object notification calls */
extern void  tranotify(OBJECT obj);

char  *tralist[MAXMODLIST];             /* list of modifers to trace (or no) */
int  traincl = -1;                      /* include == 1, exclude == 0 */

static int  loadflags = ~IO_FILES;      /* what to load from octree */

static void onsig(int  signo);
static void sigdie(int  signo, char  *msg);
static void printdefaults(void);

#ifdef PERSIST
#define RTRACE_FEATURES "Persist\nParallelPersist\nMultiProcessing\n" \
                        "IrradianceCalc\nImmediateIrradiance\nDistanceLimiting\n" \
                        "HessianAmbientCache\nAmbientAveraging\n" \
                        "AmbientValueSharing\nAdaptiveShadowTesting\n" \
                        "Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
#else
#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
                        "HessianAmbientCache\nAmbientAveraging\n" \
                        "AmbientValueSharing\nAdaptiveShadowTesting\n" \
                        "Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
#endif


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  check_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; }
        extern char  *octname;
        int  persist = 0;
        char  *octnm = NULL;
        char  **tralp = NULL;
        int  duped1 = -1;
        int  rval;
        int  i;
                                        /* global program name */
        progname = argv[0] = fixargv0(argv[0]);
                                        /* feature check only? */
        strcat(RFeatureList, RTRACE_FEATURES);
        if (argc == 2 && !strcmp(argv[1], "-features"))
                return feature_status(argc-2, argv+2);
                                        /* add trace notify function */
        for (i = 0; addobjnotify[i] != NULL; i++)
                ;
        addobjnotify[i] = tranotify;
                                        /* 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;
                }
                switch (argv[i][1]) {
                case 'n':                               /* number of cores */
                        check(2,"i");
                        nproc = atoi(argv[++i]);
                        if (nproc <= 0)
                                error(USER, "bad number of processes");
                        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 'w':                               /* warnings */
                        rval = erract[WARNING].pf != NULL;
                        check_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;
                case 'l':                               /* limit distance */
                        if (argv[i][2] != 'd')
                                goto badopt;
                        check_bool(3,lim_dist);
                        break;
                case 'I':                               /* immed. irradiance */
                        check_bool(2,imm_irrad);
                        break;
                case 'f':                               /* format i/o */
                        switch (argv[i][2]) {
                        case 'a':                               /* ascii */
                        case 'f':                               /* float */
                        case 'd':                               /* double */
                                inform = argv[i][2];
                                break;
                        default:
                                goto badopt;
                        }
                        switch (argv[i][3]) {
                        case '\0':
                                outform = inform;
                                break;
                        case 'a':                               /* ascii */
                        case 'f':                               /* float */
                        case 'd':                               /* double */
                        case 'c':                               /* color */
                                check(4,"");
                                outform = argv[i][3];
                                break;
                        default:
                                goto badopt;
                        }
                        break;
                case 'o':                               /* output */
                        outvals = argv[i]+2;
                        break;
                case 'h':                               /* header output */
                        rval = loadflags & IO_INFO;
                        check_bool(2,rval);
                        loadflags = rval ? loadflags | IO_INFO :
                                        loadflags & ~IO_INFO;
                        break;
                case 't':                               /* trace */
                        switch (argv[i][2]) {
                        case 'i':                               /* include */
                        case 'I':
                                check(3,"s");
                                if (traincl != 1) {
                                        traincl = 1;
                                        tralp = tralist;
                                }
                                if (argv[i][2] == 'I') {        /* file */
                                        rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
                                        getpath(argv[++i],getrlibpath(),R_OK));
                                        if (rval < 0) {
                                                sprintf(errmsg,
                                "cannot open trace include file \"%s\"",
                                                                argv[i]);
                                                error(SYSTEM, errmsg);
                                        }
                                        tralp += rval;
                                } else {
                                        *tralp++ = argv[++i];
                                        *tralp = NULL;
                                }
                                break;
                        case 'e':                               /* exclude */
                        case 'E':
                                check(3,"s");
                                if (traincl != 0) {
                                        traincl = 0;
                                        tralp = tralist;
                                }
                                if (argv[i][2] == 'E') {        /* file */
                                        rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
                                        getpath(argv[++i],getrlibpath(),R_OK));
                                        if (rval < 0) {
                                                sprintf(errmsg,
                                "cannot open trace exclude file \"%s\"",
                                                                argv[i]);
                                                error(SYSTEM, errmsg);
                                        }
                                        tralp += rval;
                                } else {
                                        *tralp++ = argv[++i];
                                        *tralp = NULL;
                                }
                                break;
                        default:
                                goto badopt;
                        }
                        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
                default:
                        goto badopt;
                }
        }
        if (nproc > 1 && persist)
                error(USER, "multiprocessing incompatible with persist file");
                                        /* 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)
                octnm = NULL;
        else if (i == argc-1)
                octnm = argv[i];
        else
                goto badopt;
        if (octnm == NULL)
                error(USER, "missing octree argument");
                                        /* set up output */
#ifdef  PERSIST
        if (persist) {
                duped1 = dup(fileno(stdout));   /* don't lose our output */
                openheader();
        }
#endif
        if (outform != 'a')
                SET_FILE_BINARY(stdout);
        rval = setrtoutput();
        octname = savqstr(octnm);
        readoct(octname, loadflags, &thescene, NULL);
        nsceneobjs = nobjects;

        if (loadflags & IO_INFO) {      /* print header */
                printargs(i, argv, stdout);
                printf("SOFTWARE= %s\n", VersionID);
                fputnow(stdout);
                if (rval > 0)           /* saved from setrtoutput() call */
                        printf("NCOMP=%d\n", rval);
                if ((outform == 'f') | (outform == 'd'))
                        fputendian(stdout);
                fputformat(formstr(outform), stdout);
                putchar('\n');
        }

        if (!castonly) {        /* any actual ray traversal to do? */

                ray_init_pmap();        /* PMAP: set up & load photon maps */
                
                marksources();          /* find and mark sources */

                setambient();           /* initialize ambient calculation */
        } else
                distantsources();       /* else mark only distant sources */

        fflush(stdout);                 /* in case we're duplicating header */

#ifdef  PERSIST
        if (persist) {
                                                /* 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();
                                ambsync();              /* load new values */
                        }
                        if (rval < 0)
                                error(SYSTEM, "cannot fork child for persist function");
                        pfdetach();             /* parent will run then exit */
                }
        }
runagain:
        if (persist)
                dupheader();                    /* send header to stdout */
#endif
                                        /* trace rays */
        rtrace(NULL, nproc);
                                        /* 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 */
                pfhold();
                raynum = nrays = 0;             /* reinitialize */
                goto runagain;
        }
#endif

        ray_done_pmap();           /* PMAP: free photon maps */
        
        quit(0);

badopt:
        sprintf(errmsg, "command line error at '%s'", argv[i]);
        error(USER, errmsg);
        return 1; /* pro forma return */

#undef  check
#undef  check_bool
}


void
wputs(                          /* warning output function */
        char    *s
)
{
        int  lasterrno = errno;
        eputs(s);
        errno = lasterrno;
}


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

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


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

        if (gotsig++)                   /* two signals and we're gone! */
                _exit(signo);

#ifdef SIGALRM
        alarm(15);                      /* allow 15 seconds to clean up */
        signal(SIGALRM, SIG_DFL);       /* make certain we do die */
#endif
        eputs("signal - ");
        eputs(sigerr[signo]);
        eputs("\n");
        quit(3);
}


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


static void
printdefaults(void)                     /* print default values to stdout */
{
        char  *cp;

        if (imm_irrad)
                printf("-I+\t\t\t\t# immediate irradiance on\n");
        printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
        printf("-x %-9d\t\t\t# %s\n", hresolu,
                        vresolu && hresolu ? "x resolution" : "flush interval");
        printf("-y %-9d\t\t\t# y resolution\n", vresolu);
        printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
                        "-ld-\t\t\t\t# limit distance off\n");
        printf("-h%c\t\t\t\t# %s header\n", loadflags & IO_INFO ? '+' : '-',
                        loadflags & IO_INFO ? "output" : "no");
        printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
                        inform, outform, formstr(inform), formstr(outform));
        printf("-o%-9s\t\t\t# output", outvals);
        for (cp = outvals; *cp; cp++)
                switch (*cp) {
                case 't': case 'T': printf(" trace"); break;
                case 'o': printf(" origin"); break;
                case 'd': printf(" direction"); break;
                case 'r': printf(" reflect_contrib"); break;
                case 'R': printf(" reflect_length"); break;
                case 'x': printf(" unreflect_contrib"); break;
                case 'X': printf(" unreflect_length"); break;
                case 'v': printf(" value"); break;
                case 'V': printf(" contribution"); break;
                case 'l': printf(" length"); break;
                case 'L': printf(" first_length"); break;
                case 'p': printf(" point"); break;
                case 'n': printf(" normal"); break;
                case 'N': printf(" unperturbed_normal"); break;
                case 's': printf(" surface"); break;
                case 'w': printf(" weight"); break;
                case 'W': printf(" coefficient"); break;
                case 'm': printf(" modifier"); break;
                case 'M': printf(" material"); break;
                case '~': printf(" tilde"); break;
                }
        putchar('\n');
        printf(erract[WARNING].pf != NULL ?
                        "-w+\t\t\t\t# warning messages on\n" :
                        "-w-\t\t\t\t# warning messages off\n");
        print_rdefaults();
}
Revision:	2.42
Committed:	Mon Feb 6 20:34:17 2023 UTC (15 months, 1 week ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.41:	+2 -2 lines
Log Message:	fix: fixed crash when executed with no arguments
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.42	static const char RCSid[] = "$Id: rtmain.c,v 2.41 2023/02/02 18:55:09 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* rtmain.c - main for rtrace per-ray calculation program
6			*/
7
8	greg	2.2	#include "copyright.h"
9	greg	2.1
10	schorsch	2.4	#include <signal.h>
11
12			#include "platform.h"
13	schorsch	2.7	#include "rtprocess.h" /* getpid() */
14	schorsch	2.9	#include "resolu.h"
15	greg	2.1	#include "ray.h"
16			#include "source.h"
17			#include "ambient.h"
18			#include "random.h"
19			#include "paths.h"
20	greg	2.23	#include "pmapray.h"
21	greg	2.1
22	greg	2.18	extern char progname; / global argv[0] */
23
24			extern char shm_boundary; / boundary of shared memory */
25
26	greg	2.1	/* persistent processes define */
27			#ifdef F_SETLKW
28			#define PERSIST 1 /* normal persist */
29			#define PARALLEL 2 /* parallel persist */
30			#define PCHILD 3 /* child of normal persist */
31			#endif
32
33			char sigerr[NSIG]; / signal error messages */
34			char errfile = NULL; / error output file */
35
36	greg	2.18	int nproc = 1; /* number of processes */
37
38	greg	2.31	extern char formstr(int f); / string from format */
39			extern int setrtoutput(void); /* set output values */
40	greg	2.32
41	greg	2.18	int inform = 'a'; /* input format */
42			int outform = 'a'; /* output format */
43			char outvals = "v"; / output specification */
44	greg	2.1
45	greg	2.18	int hresolu = 0; /* horizontal (scan) size */
46			int vresolu = 0; /* vertical resolution */
47	greg	2.1
48	greg	2.33	extern int castonly; /* only doing ray-casting? */
49	greg	2.32
50	greg	2.18	int imm_irrad = 0; /* compute immediate irradiance? */
51			int lim_dist = 0; /* limit distance? */
52
53			#ifndef MAXMODLIST
54			#define MAXMODLIST 1024 /* maximum modifiers we'll track */
55			#endif
56	greg	2.1
57	greg	2.18	extern void (addobjnotify[])(); / object notification calls */
58			extern void tranotify(OBJECT obj);
59
60			char tralist[MAXMODLIST]; / list of modifers to trace (or no) */
61			int traincl = -1; /* include == 1, exclude == 0 */
62	greg	2.1
63	greg	2.10	static int loadflags = ~IO_FILES; /* what to load from octree */
64
65	schorsch	2.9	static void onsig(int signo);
66			static void sigdie(int signo, char *msg);
67			static void printdefaults(void);
68	greg	2.1
69	greg	2.38	#ifdef PERSIST
70			#define RTRACE_FEATURES "Persist\nParallelPersist\nMultiProcessing\n" \
71			"IrradianceCalc\nImmediateIrradiance\nDistanceLimiting\n" \
72	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
73	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
74			"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
75	greg	2.38	#else
76			#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
77	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
78	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
79			"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
80	greg	2.38	#endif
81
82	greg	2.1
83			int
84	schorsch	2.9	main(int argc, char *argv[])
85	greg	2.1	{
86			#define check(ol,al) if (argv[i][ol] \|\| \
87			badarg(argc-i-1,argv+i+1,al)) \
88			goto badopt
89	schorsch	2.26	#define check_bool(olen,var) switch (argv[i][olen]) { \
90	greg	2.1	case '\0': var = !var; break; \
91			case 'y': case 'Y': case 't': case 'T': \
92			case '+': case '1': var = 1; break; \
93			case 'n': case 'N': case 'f': case 'F': \
94			case '-': case '0': var = 0; break; \
95			default: goto badopt; }
96	greg	2.25	extern char *octname;
97	greg	2.1	int persist = 0;
98	greg	2.18	char *octnm = NULL;
99	greg	2.22	char **tralp = NULL;
100			int duped1 = -1;
101	greg	2.1	int rval;
102			int i;
103			/* global program name */
104			progname = argv[0] = fixargv0(argv[0]);
105	greg	2.38	/* feature check only? */
106			strcat(RFeatureList, RTRACE_FEATURES);
107	greg	2.42	if (argc == 2 && !strcmp(argv[1], "-features"))
108	greg	2.38	return feature_status(argc-2, argv+2);
109	greg	2.18	/* add trace notify function */
110			for (i = 0; addobjnotify[i] != NULL; i++)
111			;
112			addobjnotify[i] = tranotify;
113	greg	2.1	/* option city */
114			for (i = 1; i < argc; i++) {
115			/* expand arguments */
116			while ((rval = expandarg(&argc, &argv, i)) > 0)
117			;
118			if (rval < 0) {
119			sprintf(errmsg, "cannot expand '%s'", argv[i]);
120			error(SYSTEM, errmsg);
121			}
122			if (argv[i] == NULL \|\| argv[i][0] != '-')
123			break; /* break from options */
124			if (!strcmp(argv[i], "-version")) {
125			puts(VersionID);
126			quit(0);
127			}
128			if (!strcmp(argv[i], "-defaults") \|\|
129			!strcmp(argv[i], "-help")) {
130			printdefaults();
131			quit(0);
132			}
133			rval = getrenderopt(argc-i, argv+i);
134			if (rval >= 0) {
135			i += rval;
136			continue;
137			}
138			switch (argv[i][1]) {
139	greg	2.18	case 'n': /* number of cores */
140			check(2,"i");
141			nproc = atoi(argv[++i]);
142			if (nproc <= 0)
143			error(USER, "bad number of processes");
144			break;
145	greg	2.1	case 'x': /* x resolution */
146			check(2,"i");
147			hresolu = atoi(argv[++i]);
148			break;
149			case 'y': /* y resolution */
150			check(2,"i");
151			vresolu = atoi(argv[++i]);
152			break;
153			case 'w': /* warnings */
154			rval = erract[WARNING].pf != NULL;
155	schorsch	2.26	check_bool(2,rval);
156	greg	2.1	if (rval) erract[WARNING].pf = wputs;
157			else erract[WARNING].pf = NULL;
158			break;
159			case 'e': /* error file */
160			check(2,"s");
161			errfile = argv[++i];
162			break;
163			case 'l': /* limit distance */
164			if (argv[i][2] != 'd')
165			goto badopt;
166	schorsch	2.26	check_bool(3,lim_dist);
167	greg	2.1	break;
168			case 'I': /* immed. irradiance */
169	schorsch	2.26	check_bool(2,imm_irrad);
170	greg	2.1	break;
171			case 'f': /* format i/o */
172			switch (argv[i][2]) {
173			case 'a': /* ascii */
174			case 'f': /* float */
175			case 'd': /* double */
176			inform = argv[i][2];
177			break;
178			default:
179			goto badopt;
180			}
181			switch (argv[i][3]) {
182			case '\0':
183			outform = inform;
184			break;
185			case 'a': /* ascii */
186			case 'f': /* float */
187			case 'd': /* double */
188			case 'c': /* color */
189			check(4,"");
190			outform = argv[i][3];
191			break;
192			default:
193			goto badopt;
194			}
195			break;
196			case 'o': /* output */
197			outvals = argv[i]+2;
198			break;
199			case 'h': /* header output */
200			rval = loadflags & IO_INFO;
201	schorsch	2.26	check_bool(2,rval);
202	greg	2.1	loadflags = rval ? loadflags \| IO_INFO :
203			loadflags & ~IO_INFO;
204			break;
205			case 't': /* trace */
206			switch (argv[i][2]) {
207			case 'i': /* include */
208			case 'I':
209			check(3,"s");
210			if (traincl != 1) {
211			traincl = 1;
212			tralp = tralist;
213			}
214			if (argv[i][2] == 'I') { /* file */
215	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
216	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
217	greg	2.1	if (rval < 0) {
218			sprintf(errmsg,
219			"cannot open trace include file \"%s\"",
220			argv[i]);
221			error(SYSTEM, errmsg);
222			}
223			tralp += rval;
224			} else {
225			*tralp++ = argv[++i];
226			*tralp = NULL;
227			}
228			break;
229			case 'e': /* exclude */
230			case 'E':
231			check(3,"s");
232			if (traincl != 0) {
233			traincl = 0;
234			tralp = tralist;
235			}
236			if (argv[i][2] == 'E') { /* file */
237	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
238	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
239	greg	2.1	if (rval < 0) {
240			sprintf(errmsg,
241			"cannot open trace exclude file \"%s\"",
242			argv[i]);
243			error(SYSTEM, errmsg);
244			}
245			tralp += rval;
246			} else {
247			*tralp++ = argv[++i];
248			*tralp = NULL;
249			}
250			break;
251			default:
252			goto badopt;
253			}
254			break;
255			#ifdef PERSIST
256			case 'P': /* persist file */
257			if (argv[i][2] == 'P') {
258			check(3,"s");
259			persist = PARALLEL;
260			} else {
261			check(2,"s");
262			persist = PERSIST;
263			}
264			persistfile(argv[++i]);
265			break;
266			#endif
267			default:
268			goto badopt;
269			}
270			}
271	greg	2.34	if (nproc > 1 && persist)
272			error(USER, "multiprocessing incompatible with persist file");
273	greg	2.1	/* initialize object types */
274			initotypes();
275			/* initialize urand */
276	greg	2.14	if (rand_samp) {
277			srandom((long)time(0));
278			initurand(0);
279			} else {
280			srandom(0L);
281			initurand(2048);
282			}
283	greg	2.1	/* set up signal handling */
284			sigdie(SIGINT, "Interrupt");
285	schorsch	2.5	#ifdef SIGHUP
286	greg	2.1	sigdie(SIGHUP, "Hangup");
287	schorsch	2.5	#endif
288	greg	2.1	sigdie(SIGTERM, "Terminate");
289	schorsch	2.5	#ifdef SIGPIPE
290	greg	2.1	sigdie(SIGPIPE, "Broken pipe");
291	schorsch	2.5	#endif
292			#ifdef SIGALRM
293	greg	2.1	sigdie(SIGALRM, "Alarm clock");
294	schorsch	2.5	#endif
295	greg	2.1	#ifdef SIGXCPU
296			sigdie(SIGXCPU, "CPU limit exceeded");
297			sigdie(SIGXFSZ, "File size exceeded");
298			#endif
299			/* open error file */
300			if (errfile != NULL) {
301			if (freopen(errfile, "a", stderr) == NULL)
302			quit(2);
303			fprintf(stderr, "************\n* PID %5d: ",
304			getpid());
305			printargs(argc, argv, stderr);
306			putc('\n', stderr);
307			fflush(stderr);
308			}
309			#ifdef NICE
310			nice(NICE); /* lower priority */
311			#endif
312			/* get octree */
313			if (i == argc)
314	greg	2.18	octnm = NULL;
315	greg	2.1	else if (i == argc-1)
316	greg	2.18	octnm = argv[i];
317	greg	2.1	else
318			goto badopt;
319	greg	2.18	if (octnm == NULL)
320	greg	2.1	error(USER, "missing octree argument");
321			/* set up output */
322			#ifdef PERSIST
323			if (persist) {
324			duped1 = dup(fileno(stdout)); /* don't lose our output */
325			openheader();
326			}
327			#endif
328			if (outform != 'a')
329	schorsch	2.4	SET_FILE_BINARY(stdout);
330	greg	2.31	rval = setrtoutput();
331	greg	2.41	octname = savqstr(octnm);
332			readoct(octname, loadflags, &thescene, NULL);
333	greg	2.1	nsceneobjs = nobjects;
334
335			if (loadflags & IO_INFO) { /* print header */
336			printargs(i, argv, stdout);
337			printf("SOFTWARE= %s\n", VersionID);
338			fputnow(stdout);
339	greg	2.31	if (rval > 0) /* saved from setrtoutput() call */
340			printf("NCOMP=%d\n", rval);
341	greg	2.30	if ((outform == 'f') \| (outform == 'd'))
342			fputendian(stdout);
343	greg	2.1	fputformat(formstr(outform), stdout);
344			putchar('\n');
345			}
346
347	greg	2.32	if (!castonly) { /* any actual ray traversal to do? */
348
349			ray_init_pmap(); /* PMAP: set up & load photon maps */
350
351			marksources(); /* find and mark sources */
352
353			setambient(); /* initialize ambient calculation */
354	greg	2.33	} else
355			distantsources(); /* else mark only distant sources */
356	greg	2.35
357	greg	2.36	fflush(stdout); /* in case we're duplicating header */
358	greg	2.35
359	greg	2.1	#ifdef PERSIST
360			if (persist) {
361			/* reconnect stdout */
362			dup2(duped1, fileno(stdout));
363			close(duped1);
364			if (persist == PARALLEL) { /* multiprocessing */
365			preload_objs(); /* preload scene */
366			shm_boundary = (char *)malloc(16);
367			strcpy(shm_boundary, "SHM_BOUNDARY");
368			while ((rval=fork()) == 0) { /* keep on forkin' */
369			pflock(1);
370			pfhold();
371	greg	2.15	ambsync(); /* load new values */
372	greg	2.1	}
373			if (rval < 0)
374			error(SYSTEM, "cannot fork child for persist function");
375	greg	2.15	pfdetach(); /* parent will run then exit */
376	greg	2.1	}
377			}
378			runagain:
379			if (persist)
380			dupheader(); /* send header to stdout */
381			#endif
382			/* trace rays */
383	greg	2.19	rtrace(NULL, nproc);
384	greg	2.1	/* flush ambient file */
385			ambsync();
386			#ifdef PERSIST
387			if (persist == PERSIST) { /* first run-through */
388			if ((rval=fork()) == 0) { /* child loops until killed */
389			pflock(1);
390			persist = PCHILD;
391			} else { /* original process exits */
392			if (rval < 0)
393			error(SYSTEM, "cannot fork child for persist function");
394			pfdetach(); /* parent exits */
395			}
396			}
397			if (persist == PCHILD) { /* wait for a signal then go again */
398			pfhold();
399			raynum = nrays = 0; /* reinitialize */
400			goto runagain;
401			}
402			#endif
403	greg	2.23
404			ray_done_pmap(); /* PMAP: free photon maps */
405
406	greg	2.1	quit(0);
407
408			badopt:
409			sprintf(errmsg, "command line error at '%s'", argv[i]);
410			error(USER, errmsg);
411	schorsch	2.9	return 1; /* pro forma return */
412	greg	2.1
413			#undef check
414	schorsch	2.26	#undef check_bool
415	greg	2.1	}
416
417
418			void
419	schorsch	2.9	wputs( /* warning output function */
420			char *s
421			)
422	greg	2.1	{
423			int lasterrno = errno;
424			eputs(s);
425			errno = lasterrno;
426			}
427
428
429			void
430	schorsch	2.9	eputs( /* put string to stderr */
431	greg	2.38	char *s
432	schorsch	2.9	)
433	greg	2.1	{
434			static int midline = 0;
435
436			if (!*s)
437			return;
438			if (!midline++) {
439			fputs(progname, stderr);
440			fputs(": ", stderr);
441			}
442			fputs(s, stderr);
443			if (s[strlen(s)-1] == '\n') {
444			fflush(stderr);
445			midline = 0;
446			}
447			}
448
449
450	schorsch	2.9	static void
451			onsig( /* fatal signal */
452			int signo
453			)
454	greg	2.1	{
455			static int gotsig = 0;
456
457			if (gotsig++) /* two signals and we're gone! */
458			_exit(signo);
459
460	schorsch	2.5	#ifdef SIGALRM
461	greg	2.1	alarm(15); /* allow 15 seconds to clean up */
462			signal(SIGALRM, SIG_DFL); /* make certain we do die */
463	schorsch	2.5	#endif
464	greg	2.1	eputs("signal - ");
465			eputs(sigerr[signo]);
466			eputs("\n");
467			quit(3);
468			}
469
470
471	schorsch	2.9	static void
472			sigdie( /* set fatal signal */
473			int signo,
474			char *msg
475			)
476	greg	2.1	{
477			if (signal(signo, onsig) == SIG_IGN)
478			signal(signo, SIG_IGN);
479			sigerr[signo] = msg;
480			}
481
482
483	schorsch	2.9	static void
484	schorsch	2.8	printdefaults(void) /* print default values to stdout */
485	greg	2.1	{
486	greg	2.38	char *cp;
487	greg	2.1
488			if (imm_irrad)
489			printf("-I+\t\t\t\t# immediate irradiance on\n");
490	greg	2.18	printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
491	greg	2.21	printf("-x %-9d\t\t\t# %s\n", hresolu,
492			vresolu && hresolu ? "x resolution" : "flush interval");
493	greg	2.16	printf("-y %-9d\t\t\t# y resolution\n", vresolu);
494	greg	2.1	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
495			"-ld-\t\t\t\t# limit distance off\n");
496	greg	2.10	printf("-h%c\t\t\t\t# %s header\n", loadflags & IO_INFO ? '+' : '-',
497			loadflags & IO_INFO ? "output" : "no");
498	greg	2.1	printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
499			inform, outform, formstr(inform), formstr(outform));
500	greg	2.10	printf("-o%-9s\t\t\t# output", outvals);
501	greg	2.1	for (cp = outvals; *cp; cp++)
502			switch (*cp) {
503	greg	2.10	case 't': case 'T': printf(" trace"); break;
504	greg	2.1	case 'o': printf(" origin"); break;
505			case 'd': printf(" direction"); break;
506	greg	2.28	case 'r': printf(" reflect_contrib"); break;
507			case 'R': printf(" reflect_length"); break;
508			case 'x': printf(" unreflect_contrib"); break;
509			case 'X': printf(" unreflect_length"); break;
510	greg	2.1	case 'v': printf(" value"); break;
511	greg	2.13	case 'V': printf(" contribution"); break;
512	greg	2.1	case 'l': printf(" length"); break;
513			case 'L': printf(" first_length"); break;
514			case 'p': printf(" point"); break;
515			case 'n': printf(" normal"); break;
516			case 'N': printf(" unperturbed_normal"); break;
517			case 's': printf(" surface"); break;
518			case 'w': printf(" weight"); break;
519	greg	2.13	case 'W': printf(" coefficient"); break;
520	greg	2.1	case 'm': printf(" modifier"); break;
521	greg	2.10	case 'M': printf(" material"); break;
522	greg	2.37	case '~': printf(" tilde"); break;
523	greg	2.1	}
524			putchar('\n');
525			printf(erract[WARNING].pf != NULL ?
526			"-w+\t\t\t\t# warning messages on\n" :
527			"-w-\t\t\t\t# warning messages off\n");
528			print_rdefaults();
529			}