xref: /freebsd/contrib/bmake/main.c (revision 39ee7a7a6bdd1557b1c3532abf60d139798ac88b)
1 /*	$NetBSD: main.c,v 1.234 2015/10/11 04:51:24 sjg Exp $	*/
2 
3 /*
4  * Copyright (c) 1988, 1989, 1990, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Adam de Boor.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 /*
36  * Copyright (c) 1989 by Berkeley Softworks
37  * All rights reserved.
38  *
39  * This code is derived from software contributed to Berkeley by
40  * Adam de Boor.
41  *
42  * Redistribution and use in source and binary forms, with or without
43  * modification, are permitted provided that the following conditions
44  * are met:
45  * 1. Redistributions of source code must retain the above copyright
46  *    notice, this list of conditions and the following disclaimer.
47  * 2. Redistributions in binary form must reproduce the above copyright
48  *    notice, this list of conditions and the following disclaimer in the
49  *    documentation and/or other materials provided with the distribution.
50  * 3. All advertising materials mentioning features or use of this software
51  *    must display the following acknowledgement:
52  *	This product includes software developed by the University of
53  *	California, Berkeley and its contributors.
54  * 4. Neither the name of the University nor the names of its contributors
55  *    may be used to endorse or promote products derived from this software
56  *    without specific prior written permission.
57  *
58  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68  * SUCH DAMAGE.
69  */
70 
71 #ifndef MAKE_NATIVE
72 static char rcsid[] = "$NetBSD: main.c,v 1.234 2015/10/11 04:51:24 sjg Exp $";
73 #else
74 #include <sys/cdefs.h>
75 #ifndef lint
76 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993\
77  The Regents of the University of California.  All rights reserved.");
78 #endif /* not lint */
79 
80 #ifndef lint
81 #if 0
82 static char sccsid[] = "@(#)main.c	8.3 (Berkeley) 3/19/94";
83 #else
84 __RCSID("$NetBSD: main.c,v 1.234 2015/10/11 04:51:24 sjg Exp $");
85 #endif
86 #endif /* not lint */
87 #endif
88 
89 /*-
90  * main.c --
91  *	The main file for this entire program. Exit routines etc
92  *	reside here.
93  *
94  * Utility functions defined in this file:
95  *	Main_ParseArgLine	Takes a line of arguments, breaks them and
96  *				treats them as if they were given when first
97  *				invoked. Used by the parse module to implement
98  *				the .MFLAGS target.
99  *
100  *	Error			Print a tagged error message. The global
101  *				MAKE variable must have been defined. This
102  *				takes a format string and optional arguments
103  *				for it.
104  *
105  *	Fatal			Print an error message and exit. Also takes
106  *				a format string and arguments for it.
107  *
108  *	Punt			Aborts all jobs and exits with a message. Also
109  *				takes a format string and arguments for it.
110  *
111  *	Finish			Finish things up by printing the number of
112  *				errors which occurred, as passed to it, and
113  *				exiting.
114  */
115 
116 #include <sys/types.h>
117 #include <sys/time.h>
118 #include <sys/param.h>
119 #include <sys/resource.h>
120 #include <sys/stat.h>
121 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL)
122 #include <sys/sysctl.h>
123 #endif
124 #include <sys/utsname.h>
125 #include "wait.h"
126 
127 #include <errno.h>
128 #include <fcntl.h>
129 #include <signal.h>
130 #include <stdarg.h>
131 #include <stdio.h>
132 #include <stdlib.h>
133 #include <time.h>
134 #include <ctype.h>
135 
136 #include "make.h"
137 #include "hash.h"
138 #include "dir.h"
139 #include "job.h"
140 #include "pathnames.h"
141 #include "trace.h"
142 
143 #ifdef USE_IOVEC
144 #include <sys/uio.h>
145 #endif
146 
147 #ifndef	DEFMAXLOCAL
148 #define	DEFMAXLOCAL DEFMAXJOBS
149 #endif	/* DEFMAXLOCAL */
150 
151 #ifndef __arraycount
152 # define __arraycount(__x)	(sizeof(__x) / sizeof(__x[0]))
153 #endif
154 
155 Lst			create;		/* Targets to be made */
156 time_t			now;		/* Time at start of make */
157 GNode			*DEFAULT;	/* .DEFAULT node */
158 Boolean			allPrecious;	/* .PRECIOUS given on line by itself */
159 
160 static Boolean		noBuiltins;	/* -r flag */
161 static Lst		makefiles;	/* ordered list of makefiles to read */
162 static Boolean		printVars;	/* print value of one or more vars */
163 static Lst		variables;	/* list of variables to print */
164 int			maxJobs;	/* -j argument */
165 static int		maxJobTokens;	/* -j argument */
166 Boolean			compatMake;	/* -B argument */
167 int			debug;		/* -d argument */
168 Boolean			debugVflag;	/* -dV */
169 Boolean			noExecute;	/* -n flag */
170 Boolean			noRecursiveExecute;	/* -N flag */
171 Boolean			keepgoing;	/* -k flag */
172 Boolean			queryFlag;	/* -q flag */
173 Boolean			touchFlag;	/* -t flag */
174 Boolean			enterFlag;	/* -w flag */
175 Boolean			enterFlagObj;	/* -w and objdir != srcdir */
176 Boolean			ignoreErrors;	/* -i flag */
177 Boolean			beSilent;	/* -s flag */
178 Boolean			oldVars;	/* variable substitution style */
179 Boolean			checkEnvFirst;	/* -e flag */
180 Boolean			parseWarnFatal;	/* -W flag */
181 Boolean			jobServer; 	/* -J flag */
182 static int jp_0 = -1, jp_1 = -1;	/* ends of parent job pipe */
183 Boolean			varNoExportEnv;	/* -X flag */
184 Boolean			doing_depend;	/* Set while reading .depend */
185 static Boolean		jobsRunning;	/* TRUE if the jobs might be running */
186 static const char *	tracefile;
187 static void		MainParseArgs(int, char **);
188 static int		ReadMakefile(const void *, const void *);
189 static void		usage(void) MAKE_ATTR_DEAD;
190 
191 static Boolean		ignorePWD;	/* if we use -C, PWD is meaningless */
192 static char objdir[MAXPATHLEN + 1];	/* where we chdir'ed to */
193 char curdir[MAXPATHLEN + 1];		/* Startup directory */
194 char *progname;				/* the program name */
195 char *makeDependfile;
196 pid_t myPid;
197 int makelevel;
198 
199 Boolean forceJobs = FALSE;
200 
201 /*
202  * On some systems MACHINE is defined as something other than
203  * what we want.
204  */
205 #ifdef FORCE_MACHINE
206 # undef MACHINE
207 # define MACHINE FORCE_MACHINE
208 #endif
209 
210 extern Lst parseIncPath;
211 
212 /*
213  * For compatibility with the POSIX version of MAKEFLAGS that includes
214  * all the options with out -, convert flags to -f -l -a -g -s.
215  */
216 static char *
217 explode(const char *flags)
218 {
219     size_t len;
220     char *nf, *st;
221     const char *f;
222 
223     if (flags == NULL)
224 	return NULL;
225 
226     for (f = flags; *f; f++)
227 	if (!isalpha((unsigned char)*f))
228 	    break;
229 
230     if (*f)
231 	return bmake_strdup(flags);
232 
233     len = strlen(flags);
234     st = nf = bmake_malloc(len * 3 + 1);
235     while (*flags) {
236 	*nf++ = '-';
237 	*nf++ = *flags++;
238 	*nf++ = ' ';
239     }
240     *nf = '\0';
241     return st;
242 }
243 
244 static void
245 parse_debug_options(const char *argvalue)
246 {
247 	const char *modules;
248 	const char *mode;
249 	char *fname;
250 	int len;
251 
252 	for (modules = argvalue; *modules; ++modules) {
253 		switch (*modules) {
254 		case 'A':
255 			debug = ~0;
256 			break;
257 		case 'a':
258 			debug |= DEBUG_ARCH;
259 			break;
260 		case 'C':
261 			debug |= DEBUG_CWD;
262 			break;
263 		case 'c':
264 			debug |= DEBUG_COND;
265 			break;
266 		case 'd':
267 			debug |= DEBUG_DIR;
268 			break;
269 		case 'e':
270 			debug |= DEBUG_ERROR;
271 			break;
272 		case 'f':
273 			debug |= DEBUG_FOR;
274 			break;
275 		case 'g':
276 			if (modules[1] == '1') {
277 				debug |= DEBUG_GRAPH1;
278 				++modules;
279 			}
280 			else if (modules[1] == '2') {
281 				debug |= DEBUG_GRAPH2;
282 				++modules;
283 			}
284 			else if (modules[1] == '3') {
285 				debug |= DEBUG_GRAPH3;
286 				++modules;
287 			}
288 			break;
289 		case 'j':
290 			debug |= DEBUG_JOB;
291 			break;
292 		case 'l':
293 			debug |= DEBUG_LOUD;
294 			break;
295 		case 'M':
296 			debug |= DEBUG_META;
297 			break;
298 		case 'm':
299 			debug |= DEBUG_MAKE;
300 			break;
301 		case 'n':
302 			debug |= DEBUG_SCRIPT;
303 			break;
304 		case 'p':
305 			debug |= DEBUG_PARSE;
306 			break;
307 		case 's':
308 			debug |= DEBUG_SUFF;
309 			break;
310 		case 't':
311 			debug |= DEBUG_TARG;
312 			break;
313 		case 'V':
314 			debugVflag = TRUE;
315 			break;
316 		case 'v':
317 			debug |= DEBUG_VAR;
318 			break;
319 		case 'x':
320 			debug |= DEBUG_SHELL;
321 			break;
322 		case 'F':
323 			if (debug_file != stdout && debug_file != stderr)
324 				fclose(debug_file);
325 			if (*++modules == '+') {
326 				modules++;
327 				mode = "a";
328 			} else
329 				mode = "w";
330 			if (strcmp(modules, "stdout") == 0) {
331 				debug_file = stdout;
332 				goto debug_setbuf;
333 			}
334 			if (strcmp(modules, "stderr") == 0) {
335 				debug_file = stderr;
336 				goto debug_setbuf;
337 			}
338 			len = strlen(modules);
339 			fname = malloc(len + 20);
340 			memcpy(fname, modules, len + 1);
341 			/* Let the filename be modified by the pid */
342 			if (strcmp(fname + len - 3, ".%d") == 0)
343 				snprintf(fname + len - 2, 20, "%d", getpid());
344 			debug_file = fopen(fname, mode);
345 			if (!debug_file) {
346 				fprintf(stderr, "Cannot open debug file %s\n",
347 				    fname);
348 				usage();
349 			}
350 			free(fname);
351 			goto debug_setbuf;
352 		default:
353 			(void)fprintf(stderr,
354 			    "%s: illegal argument to d option -- %c\n",
355 			    progname, *modules);
356 			usage();
357 		}
358 	}
359 debug_setbuf:
360 	/*
361 	 * Make the debug_file unbuffered, and make
362 	 * stdout line buffered (unless debugfile == stdout).
363 	 */
364 	setvbuf(debug_file, NULL, _IONBF, 0);
365 	if (debug_file != stdout) {
366 		setvbuf(stdout, NULL, _IOLBF, 0);
367 	}
368 }
369 
370 /*-
371  * MainParseArgs --
372  *	Parse a given argument vector. Called from main() and from
373  *	Main_ParseArgLine() when the .MAKEFLAGS target is used.
374  *
375  *	XXX: Deal with command line overriding .MAKEFLAGS in makefile
376  *
377  * Results:
378  *	None
379  *
380  * Side Effects:
381  *	Various global and local flags will be set depending on the flags
382  *	given
383  */
384 static void
385 MainParseArgs(int argc, char **argv)
386 {
387 	char *p;
388 	int c = '?';
389 	int arginc;
390 	char *argvalue;
391 	const char *getopt_def;
392 	char *optscan;
393 	Boolean inOption, dashDash = FALSE;
394 	char found_path[MAXPATHLEN + 1];	/* for searching for sys.mk */
395 
396 #define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstw"
397 /* Can't actually use getopt(3) because rescanning is not portable */
398 
399 	getopt_def = OPTFLAGS;
400 rearg:
401 	inOption = FALSE;
402 	optscan = NULL;
403 	while(argc > 1) {
404 		char *getopt_spec;
405 		if(!inOption)
406 			optscan = argv[1];
407 		c = *optscan++;
408 		arginc = 0;
409 		if(inOption) {
410 			if(c == '\0') {
411 				++argv;
412 				--argc;
413 				inOption = FALSE;
414 				continue;
415 			}
416 		} else {
417 			if (c != '-' || dashDash)
418 				break;
419 			inOption = TRUE;
420 			c = *optscan++;
421 		}
422 		/* '-' found at some earlier point */
423 		getopt_spec = strchr(getopt_def, c);
424 		if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') {
425 			/* -<something> found, and <something> should have an arg */
426 			inOption = FALSE;
427 			arginc = 1;
428 			argvalue = optscan;
429 			if(*argvalue == '\0') {
430 				if (argc < 3)
431 					goto noarg;
432 				argvalue = argv[2];
433 				arginc = 2;
434 			}
435 		} else {
436 			argvalue = NULL;
437 		}
438 		switch(c) {
439 		case '\0':
440 			arginc = 1;
441 			inOption = FALSE;
442 			break;
443 		case 'B':
444 			compatMake = TRUE;
445 			Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
446 			Var_Set(MAKE_MODE, "compat", VAR_GLOBAL, 0);
447 			break;
448 		case 'C':
449 			if (chdir(argvalue) == -1) {
450 				(void)fprintf(stderr,
451 					      "%s: chdir %s: %s\n",
452 					      progname, argvalue,
453 					      strerror(errno));
454 				exit(1);
455 			}
456 			if (getcwd(curdir, MAXPATHLEN) == NULL) {
457 				(void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
458 				exit(2);
459 			}
460 			ignorePWD = TRUE;
461 			break;
462 		case 'D':
463 			if (argvalue == NULL || argvalue[0] == 0) goto noarg;
464 			Var_Set(argvalue, "1", VAR_GLOBAL, 0);
465 			Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
466 			Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
467 			break;
468 		case 'I':
469 			if (argvalue == NULL) goto noarg;
470 			Parse_AddIncludeDir(argvalue);
471 			Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
472 			Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
473 			break;
474 		case 'J':
475 			if (argvalue == NULL) goto noarg;
476 			if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) {
477 			    (void)fprintf(stderr,
478 				"%s: internal error -- J option malformed (%s)\n",
479 				progname, argvalue);
480 				usage();
481 			}
482 			if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
483 			    (fcntl(jp_1, F_GETFD, 0) < 0)) {
484 #if 0
485 			    (void)fprintf(stderr,
486 				"%s: ###### warning -- J descriptors were closed!\n",
487 				progname);
488 			    exit(2);
489 #endif
490 			    jp_0 = -1;
491 			    jp_1 = -1;
492 			    compatMake = TRUE;
493 			} else {
494 			    Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
495 			    Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
496 			    jobServer = TRUE;
497 			}
498 			break;
499 		case 'N':
500 			noExecute = TRUE;
501 			noRecursiveExecute = TRUE;
502 			Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL);
503 			break;
504 		case 'S':
505 			keepgoing = FALSE;
506 			Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
507 			break;
508 		case 'T':
509 			if (argvalue == NULL) goto noarg;
510 			tracefile = bmake_strdup(argvalue);
511 			Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL);
512 			Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
513 			break;
514 		case 'V':
515 			if (argvalue == NULL) goto noarg;
516 			printVars = TRUE;
517 			(void)Lst_AtEnd(variables, argvalue);
518 			Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
519 			Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
520 			break;
521 		case 'W':
522 			parseWarnFatal = TRUE;
523 			break;
524 		case 'X':
525 			varNoExportEnv = TRUE;
526 			Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL);
527 			break;
528 		case 'd':
529 			if (argvalue == NULL) goto noarg;
530 			/* If '-d-opts' don't pass to children */
531 			if (argvalue[0] == '-')
532 			    argvalue++;
533 			else {
534 			    Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
535 			    Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
536 			}
537 			parse_debug_options(argvalue);
538 			break;
539 		case 'e':
540 			checkEnvFirst = TRUE;
541 			Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
542 			break;
543 		case 'f':
544 			if (argvalue == NULL) goto noarg;
545 			(void)Lst_AtEnd(makefiles, argvalue);
546 			break;
547 		case 'i':
548 			ignoreErrors = TRUE;
549 			Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
550 			break;
551 		case 'j':
552 			if (argvalue == NULL) goto noarg;
553 			forceJobs = TRUE;
554 			maxJobs = strtol(argvalue, &p, 0);
555 			if (*p != '\0' || maxJobs < 1) {
556 				(void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n",
557 				    progname);
558 				exit(1);
559 			}
560 			Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
561 			Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
562 			Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL, 0);
563 			maxJobTokens = maxJobs;
564 			break;
565 		case 'k':
566 			keepgoing = TRUE;
567 			Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
568 			break;
569 		case 'm':
570 			if (argvalue == NULL) goto noarg;
571 			/* look for magic parent directory search string */
572 			if (strncmp(".../", argvalue, 4) == 0) {
573 				if (!Dir_FindHereOrAbove(curdir, argvalue+4,
574 				    found_path, sizeof(found_path)))
575 					break;		/* nothing doing */
576 				(void)Dir_AddDir(sysIncPath, found_path);
577 			} else {
578 				(void)Dir_AddDir(sysIncPath, argvalue);
579 			}
580 			Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
581 			Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
582 			break;
583 		case 'n':
584 			noExecute = TRUE;
585 			Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
586 			break;
587 		case 'q':
588 			queryFlag = TRUE;
589 			/* Kind of nonsensical, wot? */
590 			Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
591 			break;
592 		case 'r':
593 			noBuiltins = TRUE;
594 			Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
595 			break;
596 		case 's':
597 			beSilent = TRUE;
598 			Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
599 			break;
600 		case 't':
601 			touchFlag = TRUE;
602 			Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
603 			break;
604 		case 'w':
605 			enterFlag = TRUE;
606 			Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL);
607 			break;
608 		case '-':
609 			dashDash = TRUE;
610 			break;
611 		default:
612 		case '?':
613 #ifndef MAKE_NATIVE
614 			fprintf(stderr, "getopt(%s) -> %d (%c)\n",
615 				OPTFLAGS, c, c);
616 #endif
617 			usage();
618 		}
619 		argv += arginc;
620 		argc -= arginc;
621 	}
622 
623 	oldVars = TRUE;
624 
625 	/*
626 	 * See if the rest of the arguments are variable assignments and
627 	 * perform them if so. Else take them to be targets and stuff them
628 	 * on the end of the "create" list.
629 	 */
630 	for (; argc > 1; ++argv, --argc)
631 		if (Parse_IsVar(argv[1])) {
632 			Parse_DoVar(argv[1], VAR_CMD);
633 		} else {
634 			if (!*argv[1])
635 				Punt("illegal (null) argument.");
636 			if (*argv[1] == '-' && !dashDash)
637 				goto rearg;
638 			(void)Lst_AtEnd(create, bmake_strdup(argv[1]));
639 		}
640 
641 	return;
642 noarg:
643 	(void)fprintf(stderr, "%s: option requires an argument -- %c\n",
644 	    progname, c);
645 	usage();
646 }
647 
648 /*-
649  * Main_ParseArgLine --
650  *  	Used by the parse module when a .MFLAGS or .MAKEFLAGS target
651  *	is encountered and by main() when reading the .MAKEFLAGS envariable.
652  *	Takes a line of arguments and breaks it into its
653  * 	component words and passes those words and the number of them to the
654  *	MainParseArgs function.
655  *	The line should have all its leading whitespace removed.
656  *
657  * Input:
658  *	line		Line to fracture
659  *
660  * Results:
661  *	None
662  *
663  * Side Effects:
664  *	Only those that come from the various arguments.
665  */
666 void
667 Main_ParseArgLine(const char *line)
668 {
669 	char **argv;			/* Manufactured argument vector */
670 	int argc;			/* Number of arguments in argv */
671 	char *args;			/* Space used by the args */
672 	char *buf, *p1;
673 	char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1);
674 	size_t len;
675 
676 	if (line == NULL)
677 		return;
678 	for (; *line == ' '; ++line)
679 		continue;
680 	if (!*line)
681 		return;
682 
683 #ifndef POSIX
684 	{
685 		/*
686 		 * $MAKE may simply be naming the make(1) binary
687 		 */
688 		char *cp;
689 
690 		if (!(cp = strrchr(line, '/')))
691 			cp = line;
692 		if ((cp = strstr(cp, "make")) &&
693 		    strcmp(cp, "make") == 0)
694 			return;
695 	}
696 #endif
697 	buf = bmake_malloc(len = strlen(line) + strlen(argv0) + 2);
698 	(void)snprintf(buf, len, "%s %s", argv0, line);
699 	if (p1)
700 		free(p1);
701 
702 	argv = brk_string(buf, &argc, TRUE, &args);
703 	if (argv == NULL) {
704 		Error("Unterminated quoted string [%s]", buf);
705 		free(buf);
706 		return;
707 	}
708 	free(buf);
709 	MainParseArgs(argc, argv);
710 
711 	free(args);
712 	free(argv);
713 }
714 
715 Boolean
716 Main_SetObjdir(const char *path)
717 {
718 	struct stat sb;
719 	char *p = NULL;
720 	char buf[MAXPATHLEN + 1];
721 	Boolean rc = FALSE;
722 
723 	/* expand variable substitutions */
724 	if (strchr(path, '$') != 0) {
725 		snprintf(buf, MAXPATHLEN, "%s", path);
726 		path = p = Var_Subst(NULL, buf, VAR_GLOBAL, FALSE, TRUE);
727 	}
728 
729 	if (path[0] != '/') {
730 		snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path);
731 		path = buf;
732 	}
733 
734 	/* look for the directory and try to chdir there */
735 	if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
736 		if (chdir(path)) {
737 			(void)fprintf(stderr, "make warning: %s: %s.\n",
738 				      path, strerror(errno));
739 		} else {
740 			strncpy(objdir, path, MAXPATHLEN);
741 			Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0);
742 			setenv("PWD", objdir, 1);
743 			Dir_InitDot();
744 			rc = TRUE;
745 			if (enterFlag && strcmp(objdir, curdir) != 0)
746 				enterFlagObj = TRUE;
747 		}
748 	}
749 
750 	if (p)
751 		free(p);
752 	return rc;
753 }
754 
755 /*-
756  * ReadAllMakefiles --
757  *	wrapper around ReadMakefile() to read all.
758  *
759  * Results:
760  *	TRUE if ok, FALSE on error
761  */
762 static int
763 ReadAllMakefiles(const void *p, const void *q)
764 {
765 	return (ReadMakefile(p, q) == 0);
766 }
767 
768 int
769 str2Lst_Append(Lst lp, char *str, const char *sep)
770 {
771     char *cp;
772     int n;
773 
774     if (!sep)
775 	sep = " \t";
776 
777     for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) {
778 	(void)Lst_AtEnd(lp, cp);
779 	n++;
780     }
781     return (n);
782 }
783 
784 #ifdef SIGINFO
785 /*ARGSUSED*/
786 static void
787 siginfo(int signo MAKE_ATTR_UNUSED)
788 {
789 	char dir[MAXPATHLEN];
790 	char str[2 * MAXPATHLEN];
791 	int len;
792 	if (getcwd(dir, sizeof(dir)) == NULL)
793 		return;
794 	len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir);
795 	if (len > 0)
796 		(void)write(STDERR_FILENO, str, (size_t)len);
797 }
798 #endif
799 
800 /*
801  * Allow makefiles some control over the mode we run in.
802  */
803 void
804 MakeMode(const char *mode)
805 {
806     char *mp = NULL;
807 
808     if (!mode)
809 	mode = mp = Var_Subst(NULL, "${" MAKE_MODE ":tl}",
810 			      VAR_GLOBAL, FALSE, TRUE);
811 
812     if (mode && *mode) {
813 	if (strstr(mode, "compat")) {
814 	    compatMake = TRUE;
815 	    forceJobs = FALSE;
816 	}
817 #if USE_META
818 	if (strstr(mode, "meta"))
819 	    meta_mode_init(mode);
820 #endif
821     }
822     if (mp)
823 	free(mp);
824 }
825 
826 /*-
827  * main --
828  *	The main function, for obvious reasons. Initializes variables
829  *	and a few modules, then parses the arguments give it in the
830  *	environment and on the command line. Reads the system makefile
831  *	followed by either Makefile, makefile or the file given by the
832  *	-f argument. Sets the .MAKEFLAGS PMake variable based on all the
833  *	flags it has received by then uses either the Make or the Compat
834  *	module to create the initial list of targets.
835  *
836  * Results:
837  *	If -q was given, exits -1 if anything was out-of-date. Else it exits
838  *	0.
839  *
840  * Side Effects:
841  *	The program exits when done. Targets are created. etc. etc. etc.
842  */
843 int
844 main(int argc, char **argv)
845 {
846 	Lst targs;	/* target nodes to create -- passed to Make_Init */
847 	Boolean outOfDate = FALSE; 	/* FALSE if all targets up to date */
848 	struct stat sb, sa;
849 	char *p1, *path;
850 	char mdpath[MAXPATHLEN];
851 #ifdef FORCE_MACHINE
852 	const char *machine = FORCE_MACHINE;
853 #else
854     	const char *machine = getenv("MACHINE");
855 #endif
856 	const char *machine_arch = getenv("MACHINE_ARCH");
857 	char *syspath = getenv("MAKESYSPATH");
858 	Lst sysMkPath;			/* Path of sys.mk */
859 	char *cp = NULL, *start;
860 					/* avoid faults on read-only strings */
861 	static char defsyspath[] = _PATH_DEFSYSPATH;
862 	char found_path[MAXPATHLEN + 1];	/* for searching for sys.mk */
863 	struct timeval rightnow;		/* to initialize random seed */
864 	struct utsname utsname;
865 
866 	/* default to writing debug to stderr */
867 	debug_file = stderr;
868 
869 #ifdef SIGINFO
870 	(void)bmake_signal(SIGINFO, siginfo);
871 #endif
872 	/*
873 	 * Set the seed to produce a different random sequence
874 	 * on each program execution.
875 	 */
876 	gettimeofday(&rightnow, NULL);
877 	srandom(rightnow.tv_sec + rightnow.tv_usec);
878 
879 	if ((progname = strrchr(argv[0], '/')) != NULL)
880 		progname++;
881 	else
882 		progname = argv[0];
883 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE))
884 	/*
885 	 * get rid of resource limit on file descriptors
886 	 */
887 	{
888 		struct rlimit rl;
889 		if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
890 		    rl.rlim_cur != rl.rlim_max) {
891 			rl.rlim_cur = rl.rlim_max;
892 			(void)setrlimit(RLIMIT_NOFILE, &rl);
893 		}
894 	}
895 #endif
896 
897 	if (uname(&utsname) == -1) {
898 	    (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
899 		strerror(errno));
900 	    exit(2);
901 	}
902 
903 	/*
904 	 * Get the name of this type of MACHINE from utsname
905 	 * so we can share an executable for similar machines.
906 	 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
907 	 *
908 	 * Note that both MACHINE and MACHINE_ARCH are decided at
909 	 * run-time.
910 	 */
911 	if (!machine) {
912 #ifdef MAKE_NATIVE
913 	    machine = utsname.machine;
914 #else
915 #ifdef MAKE_MACHINE
916 	    machine = MAKE_MACHINE;
917 #else
918 	    machine = "unknown";
919 #endif
920 #endif
921 	}
922 
923 	if (!machine_arch) {
924 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) && defined(CTL_HW) && defined(HW_MACHINE_ARCH)
925 	    static char machine_arch_buf[sizeof(utsname.machine)];
926 	    int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
927 	    size_t len = sizeof(machine_arch_buf);
928 
929 	    if (sysctl(mib, __arraycount(mib), machine_arch_buf,
930 		    &len, NULL, 0) < 0) {
931 		(void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname,
932 		    strerror(errno));
933 		exit(2);
934 	    }
935 
936 	    machine_arch = machine_arch_buf;
937 #else
938 #ifndef MACHINE_ARCH
939 #ifdef MAKE_MACHINE_ARCH
940             machine_arch = MAKE_MACHINE_ARCH;
941 #else
942 	    machine_arch = "unknown";
943 #endif
944 #else
945 	    machine_arch = MACHINE_ARCH;
946 #endif
947 #endif
948 	}
949 
950 	myPid = getpid();		/* remember this for vFork() */
951 
952 	/*
953 	 * Just in case MAKEOBJDIR wants us to do something tricky.
954 	 */
955 	Var_Init();		/* Initialize the lists of variables for
956 				 * parsing arguments */
957 	Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL, 0);
958 	Var_Set("MACHINE", machine, VAR_GLOBAL, 0);
959 	Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0);
960 #ifdef MAKE_VERSION
961 	Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0);
962 #endif
963 	Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */
964 	/*
965 	 * This is the traditional preference for makefiles.
966 	 */
967 #ifndef MAKEFILE_PREFERENCE_LIST
968 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
969 #endif
970 	Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST,
971 		VAR_GLOBAL, 0);
972 	Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL, 0);
973 
974 	create = Lst_Init(FALSE);
975 	makefiles = Lst_Init(FALSE);
976 	printVars = FALSE;
977 	debugVflag = FALSE;
978 	variables = Lst_Init(FALSE);
979 	beSilent = FALSE;		/* Print commands as executed */
980 	ignoreErrors = FALSE;		/* Pay attention to non-zero returns */
981 	noExecute = FALSE;		/* Execute all commands */
982 	noRecursiveExecute = FALSE;	/* Execute all .MAKE targets */
983 	keepgoing = FALSE;		/* Stop on error */
984 	allPrecious = FALSE;		/* Remove targets when interrupted */
985 	queryFlag = FALSE;		/* This is not just a check-run */
986 	noBuiltins = FALSE;		/* Read the built-in rules */
987 	touchFlag = FALSE;		/* Actually update targets */
988 	debug = 0;			/* No debug verbosity, please. */
989 	jobsRunning = FALSE;
990 
991 	maxJobs = DEFMAXLOCAL;		/* Set default local max concurrency */
992 	maxJobTokens = maxJobs;
993 	compatMake = FALSE;		/* No compat mode */
994 	ignorePWD = FALSE;
995 
996 	/*
997 	 * Initialize the parsing, directory and variable modules to prepare
998 	 * for the reading of inclusion paths and variable settings on the
999 	 * command line
1000 	 */
1001 
1002 	/*
1003 	 * Initialize various variables.
1004 	 *	MAKE also gets this name, for compatibility
1005 	 *	.MAKEFLAGS gets set to the empty string just in case.
1006 	 *	MFLAGS also gets initialized empty, for compatibility.
1007 	 */
1008 	Parse_Init();
1009 	if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) {
1010 	    /*
1011 	     * Leave alone if it is an absolute path, or if it does
1012 	     * not contain a '/' in which case we need to find it in
1013 	     * the path, like execvp(3) and the shells do.
1014 	     */
1015 	    p1 = argv[0];
1016 	} else {
1017 	    /*
1018 	     * A relative path, canonicalize it.
1019 	     */
1020 	    p1 = realpath(argv[0], mdpath);
1021 	    if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) {
1022 		p1 = argv[0];		/* realpath failed */
1023 	    }
1024 	}
1025 	Var_Set("MAKE", p1, VAR_GLOBAL, 0);
1026 	Var_Set(".MAKE", p1, VAR_GLOBAL, 0);
1027 	Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0);
1028 	Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0);
1029 	Var_Set("MFLAGS", "", VAR_GLOBAL, 0);
1030 	Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0);
1031 	/* some makefiles need to know this */
1032 	Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD, 0);
1033 
1034 	/*
1035 	 * Set some other useful macros
1036 	 */
1037 	{
1038 	    char tmp[64], *ep;
1039 
1040 	    makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0;
1041 	    if (makelevel < 0)
1042 		makelevel = 0;
1043 	    snprintf(tmp, sizeof(tmp), "%d", makelevel);
1044 	    Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL, 0);
1045 	    snprintf(tmp, sizeof(tmp), "%u", myPid);
1046 	    Var_Set(".MAKE.PID", tmp, VAR_GLOBAL, 0);
1047 	    snprintf(tmp, sizeof(tmp), "%u", getppid());
1048 	    Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL, 0);
1049 	}
1050 	if (makelevel > 0) {
1051 		char pn[1024];
1052 		snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel);
1053 		progname = bmake_strdup(pn);
1054 	}
1055 
1056 #ifdef USE_META
1057 	meta_init();
1058 #endif
1059 	/*
1060 	 * First snag any flags out of the MAKE environment variable.
1061 	 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
1062 	 * in a different format).
1063 	 */
1064 #ifdef POSIX
1065 	p1 = explode(getenv("MAKEFLAGS"));
1066 	Main_ParseArgLine(p1);
1067 	free(p1);
1068 #else
1069 	Main_ParseArgLine(getenv("MAKE"));
1070 #endif
1071 
1072 	/*
1073 	 * Find where we are (now).
1074 	 * We take care of PWD for the automounter below...
1075 	 */
1076 	if (getcwd(curdir, MAXPATHLEN) == NULL) {
1077 		(void)fprintf(stderr, "%s: getcwd: %s.\n",
1078 		    progname, strerror(errno));
1079 		exit(2);
1080 	}
1081 
1082 	MainParseArgs(argc, argv);
1083 
1084 	if (enterFlag)
1085 		printf("%s: Entering directory `%s'\n", progname, curdir);
1086 
1087 	/*
1088 	 * Verify that cwd is sane.
1089 	 */
1090 	if (stat(curdir, &sa) == -1) {
1091 	    (void)fprintf(stderr, "%s: %s: %s.\n",
1092 		 progname, curdir, strerror(errno));
1093 	    exit(2);
1094 	}
1095 
1096 	/*
1097 	 * All this code is so that we know where we are when we start up
1098 	 * on a different machine with pmake.
1099 	 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1100 	 * since the value of curdir can vary depending on how we got
1101 	 * here.  Ie sitting at a shell prompt (shell that provides $PWD)
1102 	 * or via subdir.mk in which case its likely a shell which does
1103 	 * not provide it.
1104 	 * So, to stop it breaking this case only, we ignore PWD if
1105 	 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform.
1106 	 */
1107 #ifndef NO_PWD_OVERRIDE
1108 	if (!ignorePWD) {
1109 		char *pwd, *ptmp1 = NULL, *ptmp2 = NULL;
1110 
1111 		if ((pwd = getenv("PWD")) != NULL &&
1112 		    Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) {
1113 			const char *makeobjdir = Var_Value("MAKEOBJDIR",
1114 			    VAR_CMD, &ptmp2);
1115 
1116 			if (makeobjdir == NULL || !strchr(makeobjdir, '$')) {
1117 				if (stat(pwd, &sb) == 0 &&
1118 				    sa.st_ino == sb.st_ino &&
1119 				    sa.st_dev == sb.st_dev)
1120 					(void)strncpy(curdir, pwd, MAXPATHLEN);
1121 			}
1122 		}
1123 		free(ptmp1);
1124 		free(ptmp2);
1125 	}
1126 #endif
1127 	Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0);
1128 
1129 	/*
1130 	 * Find the .OBJDIR.  If MAKEOBJDIRPREFIX, or failing that,
1131 	 * MAKEOBJDIR is set in the environment, try only that value
1132 	 * and fall back to .CURDIR if it does not exist.
1133 	 *
1134 	 * Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and
1135 	 * finally _PATH_OBJDIRPREFIX`pwd`, in that order.  If none
1136 	 * of these paths exist, just use .CURDIR.
1137 	 */
1138 	Dir_Init(curdir);
1139 	(void)Main_SetObjdir(curdir);
1140 
1141 	if ((path = Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &p1)) != NULL) {
1142 		(void)snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir);
1143 		(void)Main_SetObjdir(mdpath);
1144 		free(p1);
1145 	} else if ((path = Var_Value("MAKEOBJDIR", VAR_CMD, &p1)) != NULL) {
1146 		(void)Main_SetObjdir(path);
1147 		free(p1);
1148 	} else {
1149 		(void)snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine);
1150 		if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) {
1151 			(void)snprintf(mdpath, MAXPATHLEN, "%s%s",
1152 					_PATH_OBJDIRPREFIX, curdir);
1153 			(void)Main_SetObjdir(mdpath);
1154 		}
1155 	}
1156 
1157 	/*
1158 	 * Be compatible if user did not specify -j and did not explicitly
1159 	 * turned compatibility on
1160 	 */
1161 	if (!compatMake && !forceJobs) {
1162 		compatMake = TRUE;
1163 	}
1164 
1165 	/*
1166 	 * Initialize archive, target and suffix modules in preparation for
1167 	 * parsing the makefile(s)
1168 	 */
1169 	Arch_Init();
1170 	Targ_Init();
1171 	Suff_Init();
1172 	Trace_Init(tracefile);
1173 
1174 	DEFAULT = NULL;
1175 	(void)time(&now);
1176 
1177 	Trace_Log(MAKESTART, NULL);
1178 
1179 	/*
1180 	 * Set up the .TARGETS variable to contain the list of targets to be
1181 	 * created. If none specified, make the variable empty -- the parser
1182 	 * will fill the thing in with the default or .MAIN target.
1183 	 */
1184 	if (!Lst_IsEmpty(create)) {
1185 		LstNode ln;
1186 
1187 		for (ln = Lst_First(create); ln != NULL;
1188 		    ln = Lst_Succ(ln)) {
1189 			char *name = (char *)Lst_Datum(ln);
1190 
1191 			Var_Append(".TARGETS", name, VAR_GLOBAL);
1192 		}
1193 	} else
1194 		Var_Set(".TARGETS", "", VAR_GLOBAL, 0);
1195 
1196 
1197 	/*
1198 	 * If no user-supplied system path was given (through the -m option)
1199 	 * add the directories from the DEFSYSPATH (more than one may be given
1200 	 * as dir1:...:dirn) to the system include path.
1201 	 */
1202 	if (syspath == NULL || *syspath == '\0')
1203 		syspath = defsyspath;
1204 	else
1205 		syspath = bmake_strdup(syspath);
1206 
1207 	for (start = syspath; *start != '\0'; start = cp) {
1208 		for (cp = start; *cp != '\0' && *cp != ':'; cp++)
1209 			continue;
1210 		if (*cp == ':') {
1211 			*cp++ = '\0';
1212 		}
1213 		/* look for magic parent directory search string */
1214 		if (strncmp(".../", start, 4) != 0) {
1215 			(void)Dir_AddDir(defIncPath, start);
1216 		} else {
1217 			if (Dir_FindHereOrAbove(curdir, start+4,
1218 			    found_path, sizeof(found_path))) {
1219 				(void)Dir_AddDir(defIncPath, found_path);
1220 			}
1221 		}
1222 	}
1223 	if (syspath != defsyspath)
1224 		free(syspath);
1225 
1226 	/*
1227 	 * Read in the built-in rules first, followed by the specified
1228 	 * makefile, if it was (makefile != NULL), or the default
1229 	 * makefile and Makefile, in that order, if it wasn't.
1230 	 */
1231 	if (!noBuiltins) {
1232 		LstNode ln;
1233 
1234 		sysMkPath = Lst_Init(FALSE);
1235 		Dir_Expand(_PATH_DEFSYSMK,
1236 			   Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath,
1237 			   sysMkPath);
1238 		if (Lst_IsEmpty(sysMkPath))
1239 			Fatal("%s: no system rules (%s).", progname,
1240 			    _PATH_DEFSYSMK);
1241 		ln = Lst_Find(sysMkPath, NULL, ReadMakefile);
1242 		if (ln == NULL)
1243 			Fatal("%s: cannot open %s.", progname,
1244 			    (char *)Lst_Datum(ln));
1245 	}
1246 
1247 	if (!Lst_IsEmpty(makefiles)) {
1248 		LstNode ln;
1249 
1250 		ln = Lst_Find(makefiles, NULL, ReadAllMakefiles);
1251 		if (ln != NULL)
1252 			Fatal("%s: cannot open %s.", progname,
1253 			    (char *)Lst_Datum(ln));
1254 	} else {
1255 	    p1 = Var_Subst(NULL, "${" MAKEFILE_PREFERENCE "}",
1256 	        VAR_CMD, FALSE, TRUE);
1257 	    if (p1) {
1258 		(void)str2Lst_Append(makefiles, p1, NULL);
1259 		(void)Lst_Find(makefiles, NULL, ReadMakefile);
1260 		free(p1);
1261 	    }
1262 	}
1263 
1264 	/* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1265 	if (!noBuiltins || !printVars) {
1266 	    makeDependfile = Var_Subst(NULL, "${.MAKE.DEPENDFILE:T}",
1267 		VAR_CMD, FALSE, TRUE);
1268 	    doing_depend = TRUE;
1269 	    (void)ReadMakefile(makeDependfile, NULL);
1270 	    doing_depend = FALSE;
1271 	}
1272 
1273 	if (enterFlagObj)
1274 		printf("%s: Entering directory `%s'\n", progname, objdir);
1275 
1276 	MakeMode(NULL);
1277 
1278 	Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
1279 	if (p1)
1280 	    free(p1);
1281 
1282 	if (!compatMake)
1283 	    Job_ServerStart(maxJobTokens, jp_0, jp_1);
1284 	if (DEBUG(JOB))
1285 	    fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1286 		jp_0, jp_1, maxJobs, maxJobTokens, compatMake);
1287 
1288 	Main_ExportMAKEFLAGS(TRUE);	/* initial export */
1289 
1290 	/*
1291 	 * For compatibility, look at the directories in the VPATH variable
1292 	 * and add them to the search path, if the variable is defined. The
1293 	 * variable's value is in the same format as the PATH envariable, i.e.
1294 	 * <directory>:<directory>:<directory>...
1295 	 */
1296 	if (Var_Exists("VPATH", VAR_CMD)) {
1297 		char *vpath, savec;
1298 		/*
1299 		 * GCC stores string constants in read-only memory, but
1300 		 * Var_Subst will want to write this thing, so store it
1301 		 * in an array
1302 		 */
1303 		static char VPATH[] = "${VPATH}";
1304 
1305 		vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE, TRUE);
1306 		path = vpath;
1307 		do {
1308 			/* skip to end of directory */
1309 			for (cp = path; *cp != ':' && *cp != '\0'; cp++)
1310 				continue;
1311 			/* Save terminator character so know when to stop */
1312 			savec = *cp;
1313 			*cp = '\0';
1314 			/* Add directory to search path */
1315 			(void)Dir_AddDir(dirSearchPath, path);
1316 			*cp = savec;
1317 			path = cp + 1;
1318 		} while (savec == ':');
1319 		free(vpath);
1320 	}
1321 
1322 	/*
1323 	 * Now that all search paths have been read for suffixes et al, it's
1324 	 * time to add the default search path to their lists...
1325 	 */
1326 	Suff_DoPaths();
1327 
1328 	/*
1329 	 * Propagate attributes through :: dependency lists.
1330 	 */
1331 	Targ_Propagate();
1332 
1333 	/* print the initial graph, if the user requested it */
1334 	if (DEBUG(GRAPH1))
1335 		Targ_PrintGraph(1);
1336 
1337 	/* print the values of any variables requested by the user */
1338 	if (printVars) {
1339 		LstNode ln;
1340 		Boolean expandVars;
1341 
1342 		if (debugVflag)
1343 			expandVars = FALSE;
1344 		else
1345 			expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE);
1346 		for (ln = Lst_First(variables); ln != NULL;
1347 		    ln = Lst_Succ(ln)) {
1348 			char *var = (char *)Lst_Datum(ln);
1349 			char *value;
1350 
1351 			if (strchr(var, '$')) {
1352 			    value = p1 = Var_Subst(NULL, var, VAR_GLOBAL,
1353 						   FALSE, TRUE);
1354 			} else if (expandVars) {
1355 				char tmp[128];
1356 
1357 				if (snprintf(tmp, sizeof(tmp), "${%s}", var) >= (int)(sizeof(tmp)))
1358 					Fatal("%s: variable name too big: %s",
1359 					      progname, var);
1360 				value = p1 = Var_Subst(NULL, tmp, VAR_GLOBAL,
1361 						       FALSE, TRUE);
1362 			} else {
1363 				value = Var_Value(var, VAR_GLOBAL, &p1);
1364 			}
1365 			printf("%s\n", value ? value : "");
1366 			if (p1)
1367 				free(p1);
1368 		}
1369 	} else {
1370 		/*
1371 		 * Have now read the entire graph and need to make a list of
1372 		 * targets to create. If none was given on the command line,
1373 		 * we consult the parsing module to find the main target(s)
1374 		 * to create.
1375 		 */
1376 		if (Lst_IsEmpty(create))
1377 			targs = Parse_MainName();
1378 		else
1379 			targs = Targ_FindList(create, TARG_CREATE);
1380 
1381 		if (!compatMake) {
1382 			/*
1383 			 * Initialize job module before traversing the graph
1384 			 * now that any .BEGIN and .END targets have been read.
1385 			 * This is done only if the -q flag wasn't given
1386 			 * (to prevent the .BEGIN from being executed should
1387 			 * it exist).
1388 			 */
1389 			if (!queryFlag) {
1390 				Job_Init();
1391 				jobsRunning = TRUE;
1392 			}
1393 
1394 			/* Traverse the graph, checking on all the targets */
1395 			outOfDate = Make_Run(targs);
1396 		} else {
1397 			/*
1398 			 * Compat_Init will take care of creating all the
1399 			 * targets as well as initializing the module.
1400 			 */
1401 			Compat_Run(targs);
1402 		}
1403 	}
1404 
1405 #ifdef CLEANUP
1406 	Lst_Destroy(targs, NULL);
1407 	Lst_Destroy(variables, NULL);
1408 	Lst_Destroy(makefiles, NULL);
1409 	Lst_Destroy(create, (FreeProc *)free);
1410 #endif
1411 
1412 	/* print the graph now it's been processed if the user requested it */
1413 	if (DEBUG(GRAPH2))
1414 		Targ_PrintGraph(2);
1415 
1416 	Trace_Log(MAKEEND, 0);
1417 
1418 	if (enterFlagObj)
1419 		printf("%s: Leaving directory `%s'\n", progname, objdir);
1420 	if (enterFlag)
1421 		printf("%s: Leaving directory `%s'\n", progname, curdir);
1422 
1423 	Suff_End();
1424         Targ_End();
1425 	Arch_End();
1426 	Var_End();
1427 	Parse_End();
1428 	Dir_End();
1429 	Job_End();
1430 	Trace_End();
1431 
1432 	return outOfDate ? 1 : 0;
1433 }
1434 
1435 /*-
1436  * ReadMakefile  --
1437  *	Open and parse the given makefile.
1438  *
1439  * Results:
1440  *	0 if ok. -1 if couldn't open file.
1441  *
1442  * Side Effects:
1443  *	lots
1444  */
1445 static int
1446 ReadMakefile(const void *p, const void *q MAKE_ATTR_UNUSED)
1447 {
1448 	const char *fname = p;		/* makefile to read */
1449 	int fd;
1450 	size_t len = MAXPATHLEN;
1451 	char *name, *path = bmake_malloc(len);
1452 
1453 	if (!strcmp(fname, "-")) {
1454 		Parse_File(NULL /*stdin*/, -1);
1455 		Var_Set("MAKEFILE", "", VAR_INTERNAL, 0);
1456 	} else {
1457 		/* if we've chdir'd, rebuild the path name */
1458 		if (strcmp(curdir, objdir) && *fname != '/') {
1459 			size_t plen = strlen(curdir) + strlen(fname) + 2;
1460 			if (len < plen)
1461 				path = bmake_realloc(path, len = 2 * plen);
1462 
1463 			(void)snprintf(path, len, "%s/%s", curdir, fname);
1464 			fd = open(path, O_RDONLY);
1465 			if (fd != -1) {
1466 				fname = path;
1467 				goto found;
1468 			}
1469 
1470 			/* If curdir failed, try objdir (ala .depend) */
1471 			plen = strlen(objdir) + strlen(fname) + 2;
1472 			if (len < plen)
1473 				path = bmake_realloc(path, len = 2 * plen);
1474 			(void)snprintf(path, len, "%s/%s", objdir, fname);
1475 			fd = open(path, O_RDONLY);
1476 			if (fd != -1) {
1477 				fname = path;
1478 				goto found;
1479 			}
1480 		} else {
1481 			fd = open(fname, O_RDONLY);
1482 			if (fd != -1)
1483 				goto found;
1484 		}
1485 		/* look in -I and system include directories. */
1486 		name = Dir_FindFile(fname, parseIncPath);
1487 		if (!name)
1488 			name = Dir_FindFile(fname,
1489 				Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
1490 		if (!name || (fd = open(name, O_RDONLY)) == -1) {
1491 			if (name)
1492 				free(name);
1493 			free(path);
1494 			return(-1);
1495 		}
1496 		fname = name;
1497 		/*
1498 		 * set the MAKEFILE variable desired by System V fans -- the
1499 		 * placement of the setting here means it gets set to the last
1500 		 * makefile specified, as it is set by SysV make.
1501 		 */
1502 found:
1503 		if (!doing_depend)
1504 			Var_Set("MAKEFILE", fname, VAR_INTERNAL, 0);
1505 		Parse_File(fname, fd);
1506 	}
1507 	free(path);
1508 	return(0);
1509 }
1510 
1511 
1512 
1513 /*-
1514  * Cmd_Exec --
1515  *	Execute the command in cmd, and return the output of that command
1516  *	in a string.
1517  *
1518  * Results:
1519  *	A string containing the output of the command, or the empty string
1520  *	If errnum is not NULL, it contains the reason for the command failure
1521  *
1522  * Side Effects:
1523  *	The string must be freed by the caller.
1524  */
1525 char *
1526 Cmd_Exec(const char *cmd, const char **errnum)
1527 {
1528     const char	*args[4];   	/* Args for invoking the shell */
1529     int 	fds[2];	    	/* Pipe streams */
1530     int 	cpid;	    	/* Child PID */
1531     int 	pid;	    	/* PID from wait() */
1532     char	*res;		/* result */
1533     WAIT_T	status;		/* command exit status */
1534     Buffer	buf;		/* buffer to store the result */
1535     char	*cp;
1536     int		cc;		/* bytes read, or -1 */
1537     int		savederr;	/* saved errno */
1538 
1539 
1540     *errnum = NULL;
1541 
1542     if (!shellName)
1543 	Shell_Init();
1544     /*
1545      * Set up arguments for shell
1546      */
1547     args[0] = shellName;
1548     args[1] = "-c";
1549     args[2] = cmd;
1550     args[3] = NULL;
1551 
1552     /*
1553      * Open a pipe for fetching its output
1554      */
1555     if (pipe(fds) == -1) {
1556 	*errnum = "Couldn't create pipe for \"%s\"";
1557 	goto bad;
1558     }
1559 
1560     /*
1561      * Fork
1562      */
1563     switch (cpid = vFork()) {
1564     case 0:
1565 	/*
1566 	 * Close input side of pipe
1567 	 */
1568 	(void)close(fds[0]);
1569 
1570 	/*
1571 	 * Duplicate the output stream to the shell's output, then
1572 	 * shut the extra thing down. Note we don't fetch the error
1573 	 * stream...why not? Why?
1574 	 */
1575 	(void)dup2(fds[1], 1);
1576 	(void)close(fds[1]);
1577 
1578 	Var_ExportVars();
1579 
1580 	(void)execv(shellPath, UNCONST(args));
1581 	_exit(1);
1582 	/*NOTREACHED*/
1583 
1584     case -1:
1585 	*errnum = "Couldn't exec \"%s\"";
1586 	goto bad;
1587 
1588     default:
1589 	/*
1590 	 * No need for the writing half
1591 	 */
1592 	(void)close(fds[1]);
1593 
1594 	savederr = 0;
1595 	Buf_Init(&buf, 0);
1596 
1597 	do {
1598 	    char   result[BUFSIZ];
1599 	    cc = read(fds[0], result, sizeof(result));
1600 	    if (cc > 0)
1601 		Buf_AddBytes(&buf, cc, result);
1602 	}
1603 	while (cc > 0 || (cc == -1 && errno == EINTR));
1604 	if (cc == -1)
1605 	    savederr = errno;
1606 
1607 	/*
1608 	 * Close the input side of the pipe.
1609 	 */
1610 	(void)close(fds[0]);
1611 
1612 	/*
1613 	 * Wait for the process to exit.
1614 	 */
1615 	while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) {
1616 	    JobReapChild(pid, status, FALSE);
1617 	    continue;
1618 	}
1619 	cc = Buf_Size(&buf);
1620 	res = Buf_Destroy(&buf, FALSE);
1621 
1622 	if (savederr != 0)
1623 	    *errnum = "Couldn't read shell's output for \"%s\"";
1624 
1625 	if (WIFSIGNALED(status))
1626 	    *errnum = "\"%s\" exited on a signal";
1627 	else if (WEXITSTATUS(status) != 0)
1628 	    *errnum = "\"%s\" returned non-zero status";
1629 
1630 	/*
1631 	 * Null-terminate the result, convert newlines to spaces and
1632 	 * install it in the variable.
1633 	 */
1634 	res[cc] = '\0';
1635 	cp = &res[cc];
1636 
1637 	if (cc > 0 && *--cp == '\n') {
1638 	    /*
1639 	     * A final newline is just stripped
1640 	     */
1641 	    *cp-- = '\0';
1642 	}
1643 	while (cp >= res) {
1644 	    if (*cp == '\n') {
1645 		*cp = ' ';
1646 	    }
1647 	    cp--;
1648 	}
1649 	break;
1650     }
1651     return res;
1652 bad:
1653     res = bmake_malloc(1);
1654     *res = '\0';
1655     return res;
1656 }
1657 
1658 /*-
1659  * Error --
1660  *	Print an error message given its format.
1661  *
1662  * Results:
1663  *	None.
1664  *
1665  * Side Effects:
1666  *	The message is printed.
1667  */
1668 /* VARARGS */
1669 void
1670 Error(const char *fmt, ...)
1671 {
1672 	va_list ap;
1673 	FILE *err_file;
1674 
1675 	err_file = debug_file;
1676 	if (err_file == stdout)
1677 		err_file = stderr;
1678 	(void)fflush(stdout);
1679 	for (;;) {
1680 		va_start(ap, fmt);
1681 		fprintf(err_file, "%s: ", progname);
1682 		(void)vfprintf(err_file, fmt, ap);
1683 		va_end(ap);
1684 		(void)fprintf(err_file, "\n");
1685 		(void)fflush(err_file);
1686 		if (err_file == stderr)
1687 			break;
1688 		err_file = stderr;
1689 	}
1690 }
1691 
1692 /*-
1693  * Fatal --
1694  *	Produce a Fatal error message. If jobs are running, waits for them
1695  *	to finish.
1696  *
1697  * Results:
1698  *	None
1699  *
1700  * Side Effects:
1701  *	The program exits
1702  */
1703 /* VARARGS */
1704 void
1705 Fatal(const char *fmt, ...)
1706 {
1707 	va_list ap;
1708 
1709 	va_start(ap, fmt);
1710 	if (jobsRunning)
1711 		Job_Wait();
1712 
1713 	(void)fflush(stdout);
1714 	(void)vfprintf(stderr, fmt, ap);
1715 	va_end(ap);
1716 	(void)fprintf(stderr, "\n");
1717 	(void)fflush(stderr);
1718 
1719 	PrintOnError(NULL, NULL);
1720 
1721 	if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1722 		Targ_PrintGraph(2);
1723 	Trace_Log(MAKEERROR, 0);
1724 	exit(2);		/* Not 1 so -q can distinguish error */
1725 }
1726 
1727 /*
1728  * Punt --
1729  *	Major exception once jobs are being created. Kills all jobs, prints
1730  *	a message and exits.
1731  *
1732  * Results:
1733  *	None
1734  *
1735  * Side Effects:
1736  *	All children are killed indiscriminately and the program Lib_Exits
1737  */
1738 /* VARARGS */
1739 void
1740 Punt(const char *fmt, ...)
1741 {
1742 	va_list ap;
1743 
1744 	va_start(ap, fmt);
1745 	(void)fflush(stdout);
1746 	(void)fprintf(stderr, "%s: ", progname);
1747 	(void)vfprintf(stderr, fmt, ap);
1748 	va_end(ap);
1749 	(void)fprintf(stderr, "\n");
1750 	(void)fflush(stderr);
1751 
1752 	PrintOnError(NULL, NULL);
1753 
1754 	DieHorribly();
1755 }
1756 
1757 /*-
1758  * DieHorribly --
1759  *	Exit without giving a message.
1760  *
1761  * Results:
1762  *	None
1763  *
1764  * Side Effects:
1765  *	A big one...
1766  */
1767 void
1768 DieHorribly(void)
1769 {
1770 	if (jobsRunning)
1771 		Job_AbortAll();
1772 	if (DEBUG(GRAPH2))
1773 		Targ_PrintGraph(2);
1774 	Trace_Log(MAKEERROR, 0);
1775 	exit(2);		/* Not 1, so -q can distinguish error */
1776 }
1777 
1778 /*
1779  * Finish --
1780  *	Called when aborting due to errors in child shell to signal
1781  *	abnormal exit.
1782  *
1783  * Results:
1784  *	None
1785  *
1786  * Side Effects:
1787  *	The program exits
1788  */
1789 void
1790 Finish(int errors)
1791 	           	/* number of errors encountered in Make_Make */
1792 {
1793 	Fatal("%d error%s", errors, errors == 1 ? "" : "s");
1794 }
1795 
1796 /*
1797  * eunlink --
1798  *	Remove a file carefully, avoiding directories.
1799  */
1800 int
1801 eunlink(const char *file)
1802 {
1803 	struct stat st;
1804 
1805 	if (lstat(file, &st) == -1)
1806 		return -1;
1807 
1808 	if (S_ISDIR(st.st_mode)) {
1809 		errno = EISDIR;
1810 		return -1;
1811 	}
1812 	return unlink(file);
1813 }
1814 
1815 /*
1816  * execError --
1817  *	Print why exec failed, avoiding stdio.
1818  */
1819 void
1820 execError(const char *af, const char *av)
1821 {
1822 #ifdef USE_IOVEC
1823 	int i = 0;
1824 	struct iovec iov[8];
1825 #define IOADD(s) \
1826 	(void)(iov[i].iov_base = UNCONST(s), \
1827 	    iov[i].iov_len = strlen(iov[i].iov_base), \
1828 	    i++)
1829 #else
1830 #define	IOADD(s) (void)write(2, s, strlen(s))
1831 #endif
1832 
1833 	IOADD(progname);
1834 	IOADD(": ");
1835 	IOADD(af);
1836 	IOADD("(");
1837 	IOADD(av);
1838 	IOADD(") failed (");
1839 	IOADD(strerror(errno));
1840 	IOADD(")\n");
1841 
1842 #ifdef USE_IOVEC
1843 	while (writev(2, iov, 8) == -1 && errno == EAGAIN)
1844 	    continue;
1845 #endif
1846 }
1847 
1848 /*
1849  * usage --
1850  *	exit with usage message
1851  */
1852 static void
1853 usage(void)
1854 {
1855 	char *p;
1856 	if ((p = strchr(progname, '[')) != NULL)
1857 	    *p = '\0';
1858 
1859 	(void)fprintf(stderr,
1860 "usage: %s [-BeikNnqrstWwX] \n\
1861             [-C directory] [-D variable] [-d flags] [-f makefile]\n\
1862             [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\
1863             [-V variable] [variable=value] [target ...]\n", progname);
1864 	exit(2);
1865 }
1866 
1867 
1868 int
1869 PrintAddr(void *a, void *b)
1870 {
1871     printf("%lx ", (unsigned long) a);
1872     return b ? 0 : 0;
1873 }
1874 
1875 
1876 
1877 void
1878 PrintOnError(GNode *gn, const char *s)
1879 {
1880     static GNode *en = NULL;
1881     char tmp[64];
1882     char *cp;
1883 
1884     if (s)
1885 	printf("%s", s);
1886 
1887     printf("\n%s: stopped in %s\n", progname, curdir);
1888 
1889     if (en)
1890 	return;				/* we've been here! */
1891     if (gn) {
1892 	/*
1893 	 * We can print this even if there is no .ERROR target.
1894 	 */
1895 	Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL, 0);
1896     }
1897     strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
1898 	    sizeof(tmp) - 1);
1899     cp = Var_Subst(NULL, tmp, VAR_GLOBAL, FALSE, TRUE);
1900     if (cp) {
1901 	if (*cp)
1902 	    printf("%s", cp);
1903 	free(cp);
1904     }
1905     /*
1906      * Finally, see if there is a .ERROR target, and run it if so.
1907      */
1908     en = Targ_FindNode(".ERROR", TARG_NOCREATE);
1909     if (en) {
1910 	en->type |= OP_SPECIAL;
1911 	Compat_Make(en, en);
1912     }
1913 }
1914 
1915 void
1916 Main_ExportMAKEFLAGS(Boolean first)
1917 {
1918     static int once = 1;
1919     char tmp[64];
1920     char *s;
1921 
1922     if (once != first)
1923 	return;
1924     once = 0;
1925 
1926     strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
1927 	    sizeof(tmp));
1928     s = Var_Subst(NULL, tmp, VAR_CMD, FALSE, TRUE);
1929     if (s && *s) {
1930 #ifdef POSIX
1931 	setenv("MAKEFLAGS", s, 1);
1932 #else
1933 	setenv("MAKE", s, 1);
1934 #endif
1935     }
1936 }
1937 
1938 char *
1939 getTmpdir(void)
1940 {
1941     static char *tmpdir = NULL;
1942 
1943     if (!tmpdir) {
1944 	struct stat st;
1945 
1946 	/*
1947 	 * Honor $TMPDIR but only if it is valid.
1948 	 * Ensure it ends with /.
1949 	 */
1950 	tmpdir = Var_Subst(NULL, "${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL,
1951 			   FALSE, TRUE);
1952 	if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
1953 	    free(tmpdir);
1954 	    tmpdir = bmake_strdup(_PATH_TMP);
1955 	}
1956     }
1957     return tmpdir;
1958 }
1959 
1960 /*
1961  * Create and open a temp file using "pattern".
1962  * If "fnamep" is provided set it to a copy of the filename created.
1963  * Otherwise unlink the file once open.
1964  */
1965 int
1966 mkTempFile(const char *pattern, char **fnamep)
1967 {
1968     static char *tmpdir = NULL;
1969     char tfile[MAXPATHLEN];
1970     int fd;
1971 
1972     if (!pattern)
1973 	pattern = TMPPAT;
1974     if (!tmpdir)
1975 	tmpdir = getTmpdir();
1976     if (pattern[0] == '/') {
1977 	snprintf(tfile, sizeof(tfile), "%s", pattern);
1978     } else {
1979 	snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern);
1980     }
1981     if ((fd = mkstemp(tfile)) < 0)
1982 	Punt("Could not create temporary file %s: %s", tfile, strerror(errno));
1983     if (fnamep) {
1984 	*fnamep = bmake_strdup(tfile);
1985     } else {
1986 	unlink(tfile);			/* we just want the descriptor */
1987     }
1988     return fd;
1989 }
1990 
1991 
1992 /*
1993  * Return a Boolean based on setting of a knob.
1994  *
1995  * If the knob is not set, the supplied default is the return value.
1996  * If set, anything that looks or smells like "No", "False", "Off", "0" etc,
1997  * is FALSE, otherwise TRUE.
1998  */
1999 Boolean
2000 getBoolean(const char *name, Boolean bf)
2001 {
2002     char tmp[64];
2003     char *cp;
2004 
2005     if (snprintf(tmp, sizeof(tmp), "${%s:tl}", name) < (int)(sizeof(tmp))) {
2006 	cp = Var_Subst(NULL, tmp, VAR_GLOBAL, FALSE, TRUE);
2007 
2008 	if (cp) {
2009 	    switch(*cp) {
2010 	    case '\0':			/* not set - the default wins */
2011 		break;
2012 	    case '0':
2013 	    case 'f':
2014 	    case 'n':
2015 		bf = FALSE;
2016 		break;
2017 	    case 'o':
2018 		switch (cp[1]) {
2019 		case 'f':
2020 		    bf = FALSE;
2021 		    break;
2022 		default:
2023 		    bf = TRUE;
2024 		    break;
2025 		}
2026 		break;
2027 	    default:
2028 		bf = TRUE;
2029 		break;
2030 	    }
2031 	    free(cp);
2032 	}
2033     }
2034     return (bf);
2035 }
2036