src/rt/rtmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rtmain.c,v 2.21 2010/09/26 15:51:15 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"

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();                /* string from format */
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 */

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);


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; }
        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]);
                                        /* add trace notify function */
        for (i = 0; addobjnotify[i] != NULL; i++)
                ;
        addobjnotify[i] = tranotify;
                                        /* set our defaults */
        rand_samp = 1;
        maxdepth = -10;
        minweight = 2e-3;
                                        /* 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;
                        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;
                        bool(3,lim_dist);
                        break;
                case 'I':                               /* immed. irradiance */
                        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;
                        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,
                                        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,
                                        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) {
                if (persist)
                        error(USER, "multiprocessing incompatible with persist file");
                if (!vresolu && hresolu > 0 && hresolu < nproc)
                        error(WARNING, "number of cores should not exceed horizontal resolution");
                if (trace != NULL)
                        error(WARNING, "multiprocessing does not work properly with trace mode");
        }
                                        /* 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);
        readoct(octnm, loadflags, &thescene, NULL);
        nsceneobjs = nobjects;

        if (loadflags & IO_INFO) {      /* print header */
                printargs(i, argv, stdout);
                printf("SOFTWARE= %s\n", VersionID);
                fputnow(stdout);
                fputformat(formstr(outform), stdout);
                putchar('\n');
        }

        marksources();                  /* find and mark sources */

        setambient();                   /* initialize ambient calculation */

#ifdef  PERSIST
        if (persist) {
                fflush(stdout);
                                                /* 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
        quit(0);

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

#undef  check
#undef  bool
}


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


void
eputs(                          /* put string to stderr */
        register 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 */
{
        register 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 '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(" stroke"); 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:	2.22
Committed:	Wed Aug 7 05:10:09 2013 UTC (12 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R2, rad4R2P1, rad4R2P2
Changes since 2.21:	+3 -3 lines
Log Message:	Eliminated a number of minor warnings (all innocuous)
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.22	static const char RCSid[] = "$Id: rtmain.c,v 2.21 2010/09/26 15:51:15 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
21	greg	2.18	extern char progname; / global argv[0] */
22
23			extern char shm_boundary; / boundary of shared memory */
24
25	greg	2.1	/* persistent processes define */
26			#ifdef F_SETLKW
27			#define PERSIST 1 /* normal persist */
28			#define PARALLEL 2 /* parallel persist */
29			#define PCHILD 3 /* child of normal persist */
30			#endif
31
32			char sigerr[NSIG]; / signal error messages */
33			char errfile = NULL; / error output file */
34
35	greg	2.18	int nproc = 1; /* number of processes */
36
37	greg	2.1	extern char formstr(); / string from format */
38	greg	2.18	int inform = 'a'; /* input format */
39			int outform = 'a'; /* output format */
40			char outvals = "v"; / output specification */
41	greg	2.1
42	greg	2.18	int hresolu = 0; /* horizontal (scan) size */
43			int vresolu = 0; /* vertical resolution */
44	greg	2.1
45	greg	2.18	int imm_irrad = 0; /* compute immediate irradiance? */
46			int lim_dist = 0; /* limit distance? */
47
48			#ifndef MAXMODLIST
49			#define MAXMODLIST 1024 /* maximum modifiers we'll track */
50			#endif
51	greg	2.1
52	greg	2.18	extern void (addobjnotify[])(); / object notification calls */
53			extern void tranotify(OBJECT obj);
54
55			char tralist[MAXMODLIST]; / list of modifers to trace (or no) */
56			int traincl = -1; /* include == 1, exclude == 0 */
57	greg	2.1
58	greg	2.10	static int loadflags = ~IO_FILES; /* what to load from octree */
59
60	schorsch	2.9	static void onsig(int signo);
61			static void sigdie(int signo, char *msg);
62			static void printdefaults(void);
63	greg	2.1
64
65			int
66	schorsch	2.9	main(int argc, char *argv[])
67	greg	2.1	{
68			#define check(ol,al) if (argv[i][ol] \|\| \
69			badarg(argc-i-1,argv+i+1,al)) \
70			goto badopt
71			#define bool(olen,var) switch (argv[i][olen]) { \
72			case '\0': var = !var; break; \
73			case 'y': case 'Y': case 't': case 'T': \
74			case '+': case '1': var = 1; break; \
75			case 'n': case 'N': case 'f': case 'F': \
76			case '-': case '0': var = 0; break; \
77			default: goto badopt; }
78			int persist = 0;
79	greg	2.18	char *octnm = NULL;
80	greg	2.22	char **tralp = NULL;
81			int duped1 = -1;
82	greg	2.1	int rval;
83			int i;
84			/* global program name */
85			progname = argv[0] = fixargv0(argv[0]);
86	greg	2.18	/* add trace notify function */
87			for (i = 0; addobjnotify[i] != NULL; i++)
88			;
89			addobjnotify[i] = tranotify;
90			/* set our defaults */
91	greg	2.20	rand_samp = 1;
92	greg	2.18	maxdepth = -10;
93			minweight = 2e-3;
94	greg	2.1	/* option city */
95			for (i = 1; i < argc; i++) {
96			/* expand arguments */
97			while ((rval = expandarg(&argc, &argv, i)) > 0)
98			;
99			if (rval < 0) {
100			sprintf(errmsg, "cannot expand '%s'", argv[i]);
101			error(SYSTEM, errmsg);
102			}
103			if (argv[i] == NULL \|\| argv[i][0] != '-')
104			break; /* break from options */
105			if (!strcmp(argv[i], "-version")) {
106			puts(VersionID);
107			quit(0);
108			}
109			if (!strcmp(argv[i], "-defaults") \|\|
110			!strcmp(argv[i], "-help")) {
111			printdefaults();
112			quit(0);
113			}
114			rval = getrenderopt(argc-i, argv+i);
115			if (rval >= 0) {
116			i += rval;
117			continue;
118			}
119			switch (argv[i][1]) {
120	greg	2.18	case 'n': /* number of cores */
121			check(2,"i");
122			nproc = atoi(argv[++i]);
123			if (nproc <= 0)
124			error(USER, "bad number of processes");
125			break;
126	greg	2.1	case 'x': /* x resolution */
127			check(2,"i");
128			hresolu = atoi(argv[++i]);
129			break;
130			case 'y': /* y resolution */
131			check(2,"i");
132			vresolu = atoi(argv[++i]);
133			break;
134			case 'w': /* warnings */
135			rval = erract[WARNING].pf != NULL;
136			bool(2,rval);
137			if (rval) erract[WARNING].pf = wputs;
138			else erract[WARNING].pf = NULL;
139			break;
140			case 'e': /* error file */
141			check(2,"s");
142			errfile = argv[++i];
143			break;
144			case 'l': /* limit distance */
145			if (argv[i][2] != 'd')
146			goto badopt;
147			bool(3,lim_dist);
148			break;
149			case 'I': /* immed. irradiance */
150			bool(2,imm_irrad);
151			break;
152			case 'f': /* format i/o */
153			switch (argv[i][2]) {
154			case 'a': /* ascii */
155			case 'f': /* float */
156			case 'd': /* double */
157			inform = argv[i][2];
158			break;
159			default:
160			goto badopt;
161			}
162			switch (argv[i][3]) {
163			case '\0':
164			outform = inform;
165			break;
166			case 'a': /* ascii */
167			case 'f': /* float */
168			case 'd': /* double */
169			case 'c': /* color */
170			check(4,"");
171			outform = argv[i][3];
172			break;
173			default:
174			goto badopt;
175			}
176			break;
177			case 'o': /* output */
178			outvals = argv[i]+2;
179			break;
180			case 'h': /* header output */
181			rval = loadflags & IO_INFO;
182			bool(2,rval);
183			loadflags = rval ? loadflags \| IO_INFO :
184			loadflags & ~IO_INFO;
185			break;
186			case 't': /* trace */
187			switch (argv[i][2]) {
188			case 'i': /* include */
189			case 'I':
190			check(3,"s");
191			if (traincl != 1) {
192			traincl = 1;
193			tralp = tralist;
194			}
195			if (argv[i][2] == 'I') { /* file */
196			rval = wordfile(tralp,
197	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
198	greg	2.1	if (rval < 0) {
199			sprintf(errmsg,
200			"cannot open trace include file \"%s\"",
201			argv[i]);
202			error(SYSTEM, errmsg);
203			}
204			tralp += rval;
205			} else {
206			*tralp++ = argv[++i];
207			*tralp = NULL;
208			}
209			break;
210			case 'e': /* exclude */
211			case 'E':
212			check(3,"s");
213			if (traincl != 0) {
214			traincl = 0;
215			tralp = tralist;
216			}
217			if (argv[i][2] == 'E') { /* file */
218			rval = wordfile(tralp,
219	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
220	greg	2.1	if (rval < 0) {
221			sprintf(errmsg,
222			"cannot open trace exclude file \"%s\"",
223			argv[i]);
224			error(SYSTEM, errmsg);
225			}
226			tralp += rval;
227			} else {
228			*tralp++ = argv[++i];
229			*tralp = NULL;
230			}
231			break;
232			default:
233			goto badopt;
234			}
235			break;
236			#ifdef PERSIST
237			case 'P': /* persist file */
238			if (argv[i][2] == 'P') {
239			check(3,"s");
240			persist = PARALLEL;
241			} else {
242			check(2,"s");
243			persist = PERSIST;
244			}
245			persistfile(argv[++i]);
246			break;
247			#endif
248			default:
249			goto badopt;
250			}
251			}
252	greg	2.18	if (nproc > 1) {
253			if (persist)
254			error(USER, "multiprocessing incompatible with persist file");
255	greg	2.21	if (!vresolu && hresolu > 0 && hresolu < nproc)
256	greg	2.18	error(WARNING, "number of cores should not exceed horizontal resolution");
257			if (trace != NULL)
258			error(WARNING, "multiprocessing does not work properly with trace mode");
259			}
260	greg	2.1	/* initialize object types */
261			initotypes();
262			/* initialize urand */
263	greg	2.14	if (rand_samp) {
264			srandom((long)time(0));
265			initurand(0);
266			} else {
267			srandom(0L);
268			initurand(2048);
269			}
270	greg	2.1	/* set up signal handling */
271			sigdie(SIGINT, "Interrupt");
272	schorsch	2.5	#ifdef SIGHUP
273	greg	2.1	sigdie(SIGHUP, "Hangup");
274	schorsch	2.5	#endif
275	greg	2.1	sigdie(SIGTERM, "Terminate");
276	schorsch	2.5	#ifdef SIGPIPE
277	greg	2.1	sigdie(SIGPIPE, "Broken pipe");
278	schorsch	2.5	#endif
279			#ifdef SIGALRM
280	greg	2.1	sigdie(SIGALRM, "Alarm clock");
281	schorsch	2.5	#endif
282	greg	2.1	#ifdef SIGXCPU
283			sigdie(SIGXCPU, "CPU limit exceeded");
284			sigdie(SIGXFSZ, "File size exceeded");
285			#endif
286			/* open error file */
287			if (errfile != NULL) {
288			if (freopen(errfile, "a", stderr) == NULL)
289			quit(2);
290			fprintf(stderr, "************\n* PID %5d: ",
291			getpid());
292			printargs(argc, argv, stderr);
293			putc('\n', stderr);
294			fflush(stderr);
295			}
296			#ifdef NICE
297			nice(NICE); /* lower priority */
298			#endif
299			/* get octree */
300			if (i == argc)
301	greg	2.18	octnm = NULL;
302	greg	2.1	else if (i == argc-1)
303	greg	2.18	octnm = argv[i];
304	greg	2.1	else
305			goto badopt;
306	greg	2.18	if (octnm == NULL)
307	greg	2.1	error(USER, "missing octree argument");
308			/* set up output */
309			#ifdef PERSIST
310			if (persist) {
311			duped1 = dup(fileno(stdout)); /* don't lose our output */
312			openheader();
313			}
314			#endif
315			if (outform != 'a')
316	schorsch	2.4	SET_FILE_BINARY(stdout);
317	greg	2.18	readoct(octnm, loadflags, &thescene, NULL);
318	greg	2.1	nsceneobjs = nobjects;
319
320			if (loadflags & IO_INFO) { /* print header */
321			printargs(i, argv, stdout);
322			printf("SOFTWARE= %s\n", VersionID);
323			fputnow(stdout);
324			fputformat(formstr(outform), stdout);
325			putchar('\n');
326			}
327
328			marksources(); /* find and mark sources */
329
330			setambient(); /* initialize ambient calculation */
331
332			#ifdef PERSIST
333			if (persist) {
334			fflush(stdout);
335			/* reconnect stdout */
336			dup2(duped1, fileno(stdout));
337			close(duped1);
338			if (persist == PARALLEL) { /* multiprocessing */
339			preload_objs(); /* preload scene */
340			shm_boundary = (char *)malloc(16);
341			strcpy(shm_boundary, "SHM_BOUNDARY");
342			while ((rval=fork()) == 0) { /* keep on forkin' */
343			pflock(1);
344			pfhold();
345	greg	2.15	ambsync(); /* load new values */
346	greg	2.1	}
347			if (rval < 0)
348			error(SYSTEM, "cannot fork child for persist function");
349	greg	2.15	pfdetach(); /* parent will run then exit */
350	greg	2.1	}
351			}
352			runagain:
353			if (persist)
354			dupheader(); /* send header to stdout */
355			#endif
356			/* trace rays */
357	greg	2.19	rtrace(NULL, nproc);
358	greg	2.1	/* flush ambient file */
359			ambsync();
360			#ifdef PERSIST
361			if (persist == PERSIST) { /* first run-through */
362			if ((rval=fork()) == 0) { /* child loops until killed */
363			pflock(1);
364			persist = PCHILD;
365			} else { /* original process exits */
366			if (rval < 0)
367			error(SYSTEM, "cannot fork child for persist function");
368			pfdetach(); /* parent exits */
369			}
370			}
371			if (persist == PCHILD) { /* wait for a signal then go again */
372			pfhold();
373			raynum = nrays = 0; /* reinitialize */
374			goto runagain;
375			}
376			#endif
377			quit(0);
378
379			badopt:
380			sprintf(errmsg, "command line error at '%s'", argv[i]);
381			error(USER, errmsg);
382	schorsch	2.9	return 1; /* pro forma return */
383	greg	2.1
384			#undef check
385			#undef bool
386			}
387
388
389			void
390	schorsch	2.9	wputs( /* warning output function */
391			char *s
392			)
393	greg	2.1	{
394			int lasterrno = errno;
395			eputs(s);
396			errno = lasterrno;
397			}
398
399
400			void
401	schorsch	2.9	eputs( /* put string to stderr */
402			register char *s
403			)
404	greg	2.1	{
405			static int midline = 0;
406
407			if (!*s)
408			return;
409			if (!midline++) {
410			fputs(progname, stderr);
411			fputs(": ", stderr);
412			}
413			fputs(s, stderr);
414			if (s[strlen(s)-1] == '\n') {
415			fflush(stderr);
416			midline = 0;
417			}
418			}
419
420
421	schorsch	2.9	static void
422			onsig( /* fatal signal */
423			int signo
424			)
425	greg	2.1	{
426			static int gotsig = 0;
427
428			if (gotsig++) /* two signals and we're gone! */
429			_exit(signo);
430
431	schorsch	2.5	#ifdef SIGALRM
432	greg	2.1	alarm(15); /* allow 15 seconds to clean up */
433			signal(SIGALRM, SIG_DFL); /* make certain we do die */
434	schorsch	2.5	#endif
435	greg	2.1	eputs("signal - ");
436			eputs(sigerr[signo]);
437			eputs("\n");
438			quit(3);
439			}
440
441
442	schorsch	2.9	static void
443			sigdie( /* set fatal signal */
444			int signo,
445			char *msg
446			)
447	greg	2.1	{
448			if (signal(signo, onsig) == SIG_IGN)
449			signal(signo, SIG_IGN);
450			sigerr[signo] = msg;
451			}
452
453
454	schorsch	2.9	static void
455	schorsch	2.8	printdefaults(void) /* print default values to stdout */
456	greg	2.1	{
457			register char *cp;
458
459			if (imm_irrad)
460			printf("-I+\t\t\t\t# immediate irradiance on\n");
461	greg	2.18	printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
462	greg	2.21	printf("-x %-9d\t\t\t# %s\n", hresolu,
463			vresolu && hresolu ? "x resolution" : "flush interval");
464	greg	2.16	printf("-y %-9d\t\t\t# y resolution\n", vresolu);
465	greg	2.1	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
466			"-ld-\t\t\t\t# limit distance off\n");
467	greg	2.10	printf("-h%c\t\t\t\t# %s header\n", loadflags & IO_INFO ? '+' : '-',
468			loadflags & IO_INFO ? "output" : "no");
469	greg	2.1	printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
470			inform, outform, formstr(inform), formstr(outform));
471	greg	2.10	printf("-o%-9s\t\t\t# output", outvals);
472	greg	2.1	for (cp = outvals; *cp; cp++)
473			switch (*cp) {
474	greg	2.10	case 't': case 'T': printf(" trace"); break;
475	greg	2.1	case 'o': printf(" origin"); break;
476			case 'd': printf(" direction"); break;
477			case 'v': printf(" value"); break;
478	greg	2.13	case 'V': printf(" contribution"); break;
479	greg	2.1	case 'l': printf(" length"); break;
480			case 'L': printf(" first_length"); break;
481			case 'p': printf(" point"); break;
482			case 'n': printf(" normal"); break;
483			case 'N': printf(" unperturbed_normal"); break;
484			case 's': printf(" surface"); break;
485			case 'w': printf(" weight"); break;
486	greg	2.13	case 'W': printf(" coefficient"); break;
487	greg	2.1	case 'm': printf(" modifier"); break;
488	greg	2.10	case 'M': printf(" material"); break;
489			case '-': printf(" stroke"); break;
490	greg	2.1	}
491			putchar('\n');
492			printf(erract[WARNING].pf != NULL ?
493			"-w+\t\t\t\t# warning messages on\n" :
494			"-w-\t\t\t\t# warning messages off\n");
495			print_rdefaults();
496			}