xref: /freebsd/contrib/bmake/main.c (revision 22619282)
1 /*	$NetBSD: main.c,v 1.632 2024/07/11 20:09:16 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 /*
72  * The main file for this entire program. Exit routines etc. reside here.
73  *
74  * Utility functions defined in this file:
75  *
76  *	Main_ParseArgLine
77  *			Parse and process command line arguments from a
78  *			single string.  Used to implement the special targets
79  *			.MFLAGS and .MAKEFLAGS.
80  *
81  *	Error		Print a tagged error message.
82  *
83  *	Fatal		Print an error message and exit.
84  *
85  *	Punt		Abort all jobs and exit with a message.
86  *
87  *	Finish		Finish things up by printing the number of errors
88  *			that occurred, and exit.
89  */
90 
91 #include <sys/types.h>
92 #include <sys/time.h>
93 #include <sys/param.h>
94 #include <sys/resource.h>
95 #include <sys/stat.h>
96 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL)
97 #include <sys/sysctl.h>
98 #endif
99 #include <sys/utsname.h>
100 #include "wait.h"
101 
102 #include <errno.h>
103 #include <signal.h>
104 #include <stdarg.h>
105 #include <time.h>
106 
107 #include "make.h"
108 #include "dir.h"
109 #include "job.h"
110 #include "pathnames.h"
111 #include "trace.h"
112 
113 /*	"@(#)main.c	8.3 (Berkeley) 3/19/94"	*/
114 MAKE_RCSID("$NetBSD: main.c,v 1.632 2024/07/11 20:09:16 sjg Exp $");
115 #if defined(MAKE_NATIVE)
116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 "
117 	    "The Regents of the University of California.  "
118 	    "All rights reserved.");
119 #endif
120 
121 #ifndef __arraycount
122 # define __arraycount(__x)	(sizeof(__x) / sizeof(__x[0]))
123 #endif
124 
125 CmdOpts opts;
126 time_t now;			/* Time at start of make */
127 GNode *defaultNode;		/* .DEFAULT node */
128 bool allPrecious;		/* .PRECIOUS given on a line by itself */
129 bool deleteOnError;		/* .DELETE_ON_ERROR: set */
130 
131 static int maxJobTokens;	/* -j argument */
132 static bool enterFlagObj;	/* -w and objdir != srcdir */
133 
134 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */
135 bool doing_depend;		/* Set while reading .depend */
136 static bool jobsRunning;	/* true if the jobs might be running */
137 static const char *tracefile;
138 static bool ReadMakefile(const char *);
139 static void purge_relative_cached_realpaths(void);
140 
141 static bool ignorePWD;		/* if we use -C, PWD is meaningless */
142 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */
143 char curdir[MAXPATHLEN + 1];	/* Startup directory */
144 const char *progname;
145 char *makeDependfile;
146 pid_t myPid;
147 int makelevel;
148 
149 bool forceJobs = false;
150 static int main_errors = 0;
151 static HashTable cached_realpaths;
152 
153 /*
154  * For compatibility with the POSIX version of MAKEFLAGS that includes
155  * all the options without '-', convert 'flags' to '-f -l -a -g -s '.
156  */
157 static char *
explode(const char * flags)158 explode(const char *flags)
159 {
160 	char *exploded, *ep;
161 	const char *p;
162 
163 	if (flags == NULL)
164 		return NULL;
165 
166 	for (p = flags; *p != '\0'; p++)
167 		if (!ch_isalpha(*p))
168 			return bmake_strdup(flags);
169 
170 	exploded = bmake_malloc((size_t)(p - flags) * 3 + 1);
171 	for (p = flags, ep = exploded; *p != '\0'; p++) {
172 		*ep++ = '-';
173 		*ep++ = *p;
174 		*ep++ = ' ';
175 	}
176 	*ep = '\0';
177 	return exploded;
178 }
179 
180 MAKE_ATTR_DEAD static void
usage(void)181 usage(void)
182 {
183 	size_t prognameLen = strcspn(progname, "[");
184 
185 	(void)fprintf(stderr,
186 "usage: %.*s [-BeikNnqrSstWwX]\n"
187 "            [-C directory] [-D variable] [-d flags] [-f makefile]\n"
188 "            [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n"
189 "            [-V variable] [-v variable] [variable=value] [target ...]\n",
190 	    (int)prognameLen, progname);
191 	exit(2);
192 }
193 
194 static void
MainParseArgDebugFile(const char * arg)195 MainParseArgDebugFile(const char *arg)
196 {
197 	const char *mode;
198 	size_t len;
199 	char *fname;
200 
201 	if (opts.debug_file != stdout && opts.debug_file != stderr)
202 		fclose(opts.debug_file);
203 
204 	if (*arg == '+') {
205 		arg++;
206 		mode = "a";
207 	} else
208 		mode = "w";
209 
210 	if (strcmp(arg, "stdout") == 0) {
211 		opts.debug_file = stdout;
212 		return;
213 	}
214 	if (strcmp(arg, "stderr") == 0) {
215 		opts.debug_file = stderr;
216 		return;
217 	}
218 
219 	len = strlen(arg);
220 	fname = bmake_malloc(len + 20);
221 	memcpy(fname, arg, len + 1);
222 
223 	/* Replace the trailing '%d' after '.%d' with the pid. */
224 	if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0)
225 		snprintf(fname + len - 2, 20, "%d", getpid());
226 
227 	opts.debug_file = fopen(fname, mode);
228 	if (opts.debug_file == NULL) {
229 		fprintf(stderr, "Cannot open debug file \"%s\"\n", fname);
230 		exit(2);
231 	}
232 	free(fname);
233 }
234 
235 static void
MainParseArgDebug(const char * argvalue)236 MainParseArgDebug(const char *argvalue)
237 {
238 	const char *modules;
239 	DebugFlags debug = opts.debug;
240 
241 	for (modules = argvalue; *modules != '\0'; modules++) {
242 		switch (*modules) {
243 		case '0':	/* undocumented, only intended for tests */
244 			memset(&debug, 0, sizeof(debug));
245 			break;
246 		case 'A':
247 			memset(&debug, ~0, sizeof(debug));
248 			break;
249 		case 'a':
250 			debug.DEBUG_ARCH = true;
251 			break;
252 		case 'C':
253 			debug.DEBUG_CWD = true;
254 			break;
255 		case 'c':
256 			debug.DEBUG_COND = true;
257 			break;
258 		case 'd':
259 			debug.DEBUG_DIR = true;
260 			break;
261 		case 'e':
262 			debug.DEBUG_ERROR = true;
263 			break;
264 		case 'f':
265 			debug.DEBUG_FOR = true;
266 			break;
267 		case 'g':
268 			if (modules[1] == '1') {
269 				debug.DEBUG_GRAPH1 = true;
270 				modules++;
271 			} else if (modules[1] == '2') {
272 				debug.DEBUG_GRAPH2 = true;
273 				modules++;
274 			} else if (modules[1] == '3') {
275 				debug.DEBUG_GRAPH3 = true;
276 				modules++;
277 			}
278 			break;
279 		case 'h':
280 			debug.DEBUG_HASH = true;
281 			break;
282 		case 'j':
283 			debug.DEBUG_JOB = true;
284 			break;
285 		case 'L':
286 			opts.strict = true;
287 			break;
288 		case 'l':
289 			debug.DEBUG_LOUD = true;
290 			break;
291 		case 'M':
292 			debug.DEBUG_META = true;
293 			break;
294 		case 'm':
295 			debug.DEBUG_MAKE = true;
296 			break;
297 		case 'n':
298 			debug.DEBUG_SCRIPT = true;
299 			break;
300 		case 'p':
301 			debug.DEBUG_PARSE = true;
302 			break;
303 		case 's':
304 			debug.DEBUG_SUFF = true;
305 			break;
306 		case 't':
307 			debug.DEBUG_TARG = true;
308 			break;
309 		case 'V':
310 			opts.debugVflag = true;
311 			break;
312 		case 'v':
313 			debug.DEBUG_VAR = true;
314 			break;
315 		case 'x':
316 			debug.DEBUG_SHELL = true;
317 			break;
318 		case 'F':
319 			MainParseArgDebugFile(modules + 1);
320 			goto finish;
321 		default:
322 			(void)fprintf(stderr,
323 			    "%s: illegal argument to d option -- %c\n",
324 			    progname, *modules);
325 			usage();
326 		}
327 	}
328 
329 finish:
330 	opts.debug = debug;
331 
332 	setvbuf(opts.debug_file, NULL, _IONBF, 0);
333 	if (opts.debug_file != stdout)
334 		setvbuf(stdout, NULL, _IOLBF, 0);
335 }
336 
337 /* Is path relative or does it contain any relative component "." or ".."? */
338 static bool
IsRelativePath(const char * path)339 IsRelativePath(const char *path)
340 {
341 	const char *p;
342 
343 	if (path[0] != '/')
344 		return true;
345 	p = path;
346 	while ((p = strstr(p, "/.")) != NULL) {
347 		p += 2;
348 		if (*p == '.')
349 			p++;
350 		if (*p == '/' || *p == '\0')
351 			return true;
352 	}
353 	return false;
354 }
355 
356 static void
MainParseArgChdir(const char * argvalue)357 MainParseArgChdir(const char *argvalue)
358 {
359 	struct stat sa, sb;
360 
361 	if (chdir(argvalue) == -1) {
362 		(void)fprintf(stderr, "%s: chdir %s: %s\n",
363 		    progname, argvalue, strerror(errno));
364 		exit(2);	/* Not 1 so -q can distinguish error */
365 	}
366 	if (getcwd(curdir, MAXPATHLEN) == NULL) {
367 		(void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
368 		exit(2);
369 	}
370 	if (!IsRelativePath(argvalue) &&
371 	    stat(argvalue, &sa) != -1 &&
372 	    stat(curdir, &sb) != -1 &&
373 	    sa.st_ino == sb.st_ino &&
374 	    sa.st_dev == sb.st_dev)
375 		snprintf(curdir, MAXPATHLEN, "%s", argvalue);
376 	ignorePWD = true;
377 }
378 
379 static void
MainParseArgJobsInternal(const char * argvalue)380 MainParseArgJobsInternal(const char *argvalue)
381 {
382 	char end;
383 	if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) {
384 		(void)fprintf(stderr,
385 		    "%s: internal error -- J option malformed (%s)\n",
386 		    progname, argvalue);
387 		usage();
388 	}
389 	if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
390 	    (fcntl(jp_1, F_GETFD, 0) < 0)) {
391 		jp_0 = -1;
392 		jp_1 = -1;
393 		opts.compatMake = true;
394 	} else {
395 		Global_Append(MAKEFLAGS, "-J");
396 		Global_Append(MAKEFLAGS, argvalue);
397 	}
398 }
399 
400 static void
MainParseArgJobs(const char * arg)401 MainParseArgJobs(const char *arg)
402 {
403 	const char *p;
404 	char *end;
405 	char v[12];
406 
407 	forceJobs = true;
408 	opts.maxJobs = (int)strtol(arg, &end, 0);
409 	p = end;
410 #ifdef _SC_NPROCESSORS_ONLN
411 	if (*p != '\0') {
412 		double d;
413 
414 		if (*p == 'C')
415 			d = (opts.maxJobs > 0) ? opts.maxJobs : 1;
416 		else if (*p == '.') {
417 			d = strtod(arg, &end);
418 			p = end;
419 		} else
420 			d = 0.0;
421 		if (d > 0.0) {
422 			p = "";
423 			opts.maxJobs = (int)sysconf(_SC_NPROCESSORS_ONLN);
424 			opts.maxJobs = (int)(d * (double)opts.maxJobs);
425 		}
426 	}
427 #endif
428 	if (*p != '\0' || opts.maxJobs < 1) {
429 		(void)fprintf(stderr,
430 		    "%s: argument '%s' to option '-j' "
431 		    "must be a positive number\n",
432 		    progname, arg);
433 		exit(2);	/* Not 1 so -q can distinguish error */
434 	}
435 	snprintf(v, sizeof(v), "%d", opts.maxJobs);
436 	Global_Append(MAKEFLAGS, "-j");
437 	Global_Append(MAKEFLAGS, v);
438 	Global_Set(".MAKE.JOBS", v);
439 	maxJobTokens = opts.maxJobs;
440 }
441 
442 static void
MainParseArgSysInc(const char * argvalue)443 MainParseArgSysInc(const char *argvalue)
444 {
445 	if (strncmp(argvalue, ".../", 4) == 0) {
446 		char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4);
447 		if (found_path == NULL)
448 			return;
449 		(void)SearchPath_Add(sysIncPath, found_path);
450 		free(found_path);
451 	} else {
452 		(void)SearchPath_Add(sysIncPath, argvalue);
453 	}
454 	Global_Append(MAKEFLAGS, "-m");
455 	Global_Append(MAKEFLAGS, argvalue);
456 	Dir_SetSYSPATH();
457 }
458 
459 static bool
MainParseOption(char c,const char * argvalue)460 MainParseOption(char c, const char *argvalue)
461 {
462 	switch (c) {
463 	case '\0':
464 		break;
465 	case 'B':
466 		opts.compatMake = true;
467 		Global_Append(MAKEFLAGS, "-B");
468 		Global_Set(".MAKE.MODE", "compat");
469 		break;
470 	case 'C':
471 		MainParseArgChdir(argvalue);
472 		break;
473 	case 'D':
474 		if (argvalue[0] == '\0')
475 			return false;
476 		Var_SetExpand(SCOPE_GLOBAL, argvalue, "1");
477 		Global_Append(MAKEFLAGS, "-D");
478 		Global_Append(MAKEFLAGS, argvalue);
479 		break;
480 	case 'I':
481 		SearchPath_Add(parseIncPath, argvalue);
482 		Global_Append(MAKEFLAGS, "-I");
483 		Global_Append(MAKEFLAGS, argvalue);
484 		break;
485 	case 'J':
486 		MainParseArgJobsInternal(argvalue);
487 		break;
488 	case 'N':
489 		opts.noExecute = true;
490 		opts.noRecursiveExecute = true;
491 		Global_Append(MAKEFLAGS, "-N");
492 		break;
493 	case 'S':
494 		opts.keepgoing = false;
495 		Global_Append(MAKEFLAGS, "-S");
496 		break;
497 	case 'T':
498 		tracefile = bmake_strdup(argvalue);
499 		Global_Append(MAKEFLAGS, "-T");
500 		Global_Append(MAKEFLAGS, argvalue);
501 		break;
502 	case 'V':
503 	case 'v':
504 		opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED;
505 		Lst_Append(&opts.variables, bmake_strdup(argvalue));
506 		/* XXX: Why always -V? */
507 		Global_Append(MAKEFLAGS, "-V");
508 		Global_Append(MAKEFLAGS, argvalue);
509 		break;
510 	case 'W':
511 		opts.parseWarnFatal = true;
512 		/* XXX: why no Global_Append? */
513 		break;
514 	case 'X':
515 		opts.varNoExportEnv = true;
516 		Global_Append(MAKEFLAGS, "-X");
517 		break;
518 	case 'd':
519 		/* If '-d-opts' don't pass to children */
520 		if (argvalue[0] == '-')
521 			argvalue++;
522 		else {
523 			Global_Append(MAKEFLAGS, "-d");
524 			Global_Append(MAKEFLAGS, argvalue);
525 		}
526 		MainParseArgDebug(argvalue);
527 		break;
528 	case 'e':
529 		opts.checkEnvFirst = true;
530 		Global_Append(MAKEFLAGS, "-e");
531 		break;
532 	case 'f':
533 		Lst_Append(&opts.makefiles, bmake_strdup(argvalue));
534 		break;
535 	case 'i':
536 		opts.ignoreErrors = true;
537 		Global_Append(MAKEFLAGS, "-i");
538 		break;
539 	case 'j':
540 		MainParseArgJobs(argvalue);
541 		break;
542 	case 'k':
543 		opts.keepgoing = true;
544 		Global_Append(MAKEFLAGS, "-k");
545 		break;
546 	case 'm':
547 		MainParseArgSysInc(argvalue);
548 		/* XXX: why no Var_Append? */
549 		break;
550 	case 'n':
551 		opts.noExecute = true;
552 		Global_Append(MAKEFLAGS, "-n");
553 		break;
554 	case 'q':
555 		opts.query = true;
556 		/* Kind of nonsensical, wot? */
557 		Global_Append(MAKEFLAGS, "-q");
558 		break;
559 	case 'r':
560 		opts.noBuiltins = true;
561 		Global_Append(MAKEFLAGS, "-r");
562 		break;
563 	case 's':
564 		opts.silent = true;
565 		Global_Append(MAKEFLAGS, "-s");
566 		break;
567 	case 't':
568 		opts.touch = true;
569 		Global_Append(MAKEFLAGS, "-t");
570 		break;
571 	case 'w':
572 		opts.enterFlag = true;
573 		Global_Append(MAKEFLAGS, "-w");
574 		break;
575 	default:
576 		usage();
577 	}
578 	return true;
579 }
580 
581 /*
582  * Parse the given arguments.  Called from main() and from
583  * Main_ParseArgLine() when the .MAKEFLAGS target is used.
584  *
585  * The arguments must be treated as read-only and will be freed after the
586  * call.
587  *
588  * XXX: Deal with command line overriding .MAKEFLAGS in makefile
589  */
590 static void
MainParseArgs(int argc,char ** argv)591 MainParseArgs(int argc, char **argv)
592 {
593 	char c;
594 	int arginc;
595 	char *argvalue;
596 	char *optscan;
597 	bool inOption, dashDash = false;
598 
599 	const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w";
600 /* Can't actually use getopt(3) because rescanning is not portable */
601 
602 rearg:
603 	inOption = false;
604 	optscan = NULL;
605 	while (argc > 1) {
606 		const char *optspec;
607 		if (!inOption)
608 			optscan = argv[1];
609 		c = *optscan++;
610 		arginc = 0;
611 		if (inOption) {
612 			if (c == '\0') {
613 				argv++;
614 				argc--;
615 				inOption = false;
616 				continue;
617 			}
618 		} else {
619 			if (c != '-' || dashDash)
620 				break;
621 			inOption = true;
622 			c = *optscan++;
623 		}
624 		/* '-' found at some earlier point */
625 		optspec = strchr(optspecs, c);
626 		if (c != '\0' && optspec != NULL && optspec[1] == ':') {
627 			/*
628 			 * -<something> found, and <something> should have an
629 			 * argument
630 			 */
631 			inOption = false;
632 			arginc = 1;
633 			argvalue = optscan;
634 			if (*argvalue == '\0') {
635 				if (argc < 3)
636 					goto noarg;
637 				argvalue = argv[2];
638 				arginc = 2;
639 			}
640 		} else {
641 			argvalue = NULL;
642 		}
643 		switch (c) {
644 		case '\0':
645 			arginc = 1;
646 			inOption = false;
647 			break;
648 		case '-':
649 			dashDash = true;
650 			break;
651 		default:
652 			if (!MainParseOption(c, argvalue))
653 				goto noarg;
654 		}
655 		argv += arginc;
656 		argc -= arginc;
657 	}
658 
659 	/*
660 	 * See if the rest of the arguments are variable assignments and
661 	 * perform them if so. Else take them to be targets and stuff them
662 	 * on the end of the "create" list.
663 	 */
664 	for (; argc > 1; argv++, argc--) {
665 		if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) {
666 			if (argv[1][0] == '\0')
667 				Punt("illegal (null) argument.");
668 			if (argv[1][0] == '-' && !dashDash)
669 				goto rearg;
670 			Lst_Append(&opts.create, bmake_strdup(argv[1]));
671 		}
672 	}
673 
674 	return;
675 noarg:
676 	(void)fprintf(stderr, "%s: option requires an argument -- %c\n",
677 	    progname, c);
678 	usage();
679 }
680 
681 /*
682  * Break a line of arguments into words and parse them.
683  *
684  * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and
685  * by main() when reading the MAKEFLAGS environment variable.
686  */
687 void
Main_ParseArgLine(const char * line)688 Main_ParseArgLine(const char *line)
689 {
690 	Words words;
691 	char *buf;
692 	const char *p;
693 
694 	if (line == NULL)
695 		return;
696 	for (p = line; *p == ' '; p++)
697 		continue;
698 	if (p[0] == '\0')
699 		return;
700 
701 	{
702 		FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE");
703 		buf = str_concat3(argv0.str, " ", p);
704 		FStr_Done(&argv0);
705 	}
706 
707 	words = Str_Words(buf, true);
708 	if (words.words == NULL) {
709 		Error("Unterminated quoted string [%s]", buf);
710 		free(buf);
711 		return;
712 	}
713 	free(buf);
714 	MainParseArgs((int)words.len, words.words);
715 
716 	Words_Free(words);
717 }
718 
719 bool
Main_SetObjdir(bool writable,const char * fmt,...)720 Main_SetObjdir(bool writable, const char *fmt, ...)
721 {
722 	struct stat sb;
723 	char *path;
724 	char buf[MAXPATHLEN + 1];
725 	char buf2[MAXPATHLEN + 1];
726 	va_list ap;
727 
728 	va_start(ap, fmt);
729 	vsnprintf(path = buf, MAXPATHLEN, fmt, ap);
730 	va_end(ap);
731 
732 	if (path[0] != '/') {
733 		if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN)
734 			path = buf2;
735 		else
736 			return false;
737 	}
738 
739 	/* look for the directory and try to chdir there */
740 	if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode))
741 		return false;
742 
743 	if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) {
744 		(void)fprintf(stderr, "%s: warning: %s: %s.\n",
745 		    progname, path, strerror(errno));
746 		/* Allow debugging how we got here - not always obvious */
747 		if (GetBooleanExpr("${MAKE_DEBUG_OBJDIR_CHECK_WRITABLE}",
748 			false))
749 			PrintOnError(NULL, "");
750 		return false;
751 	}
752 
753 	snprintf(objdir, sizeof objdir, "%s", path);
754 	Global_Set(".OBJDIR", objdir);
755 	setenv("PWD", objdir, 1);
756 	Dir_InitDot();
757 	purge_relative_cached_realpaths();
758 	if (opts.enterFlag && strcmp(objdir, curdir) != 0)
759 		enterFlagObj = true;
760 	return true;
761 }
762 
763 static bool
SetVarObjdir(bool writable,const char * var,const char * suffix)764 SetVarObjdir(bool writable, const char *var, const char *suffix)
765 {
766 	FStr path = Var_Value(SCOPE_CMDLINE, var);
767 
768 	if (path.str == NULL || path.str[0] == '\0') {
769 		FStr_Done(&path);
770 		return false;
771 	}
772 
773 	Var_Expand(&path, SCOPE_GLOBAL, VARE_EVAL);
774 
775 	(void)Main_SetObjdir(writable, "%s%s", path.str, suffix);
776 
777 	FStr_Done(&path);
778 	return true;
779 }
780 
781 /*
782  * Splits str into words (in-place, modifying it), adding them to the list.
783  * The string must be kept alive as long as the list.
784  */
785 void
AppendWords(StringList * lp,char * str)786 AppendWords(StringList *lp, char *str)
787 {
788 	char *p;
789 	const char *sep = " \t";
790 
791 	for (p = strtok(str, sep); p != NULL; p = strtok(NULL, sep))
792 		Lst_Append(lp, p);
793 }
794 
795 #ifdef SIGINFO
796 static void
siginfo(int signo MAKE_ATTR_UNUSED)797 siginfo(int signo MAKE_ATTR_UNUSED)
798 {
799 	char dir[MAXPATHLEN];
800 	char str[2 * MAXPATHLEN];
801 	int len;
802 	if (getcwd(dir, sizeof dir) == NULL)
803 		return;
804 	len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir);
805 	if (len > 0)
806 		(void)write(STDERR_FILENO, str, (size_t)len);
807 }
808 #endif
809 
810 /* Allow makefiles some control over the mode we run in. */
811 static void
MakeMode(void)812 MakeMode(void)
813 {
814 	char *mode = Var_Subst("${.MAKE.MODE:tl}", SCOPE_GLOBAL, VARE_EVAL);
815 	/* TODO: handle errors */
816 
817 	if (mode[0] != '\0') {
818 		if (strstr(mode, "compat") != NULL) {
819 			opts.compatMake = true;
820 			forceJobs = false;
821 		}
822 #if USE_META
823 		if (strstr(mode, "meta") != NULL)
824 			meta_mode_init(mode);
825 #endif
826 		if (strstr(mode, "randomize-targets") != NULL)
827 			opts.randomizeTargets = true;
828 	}
829 
830 	free(mode);
831 }
832 
833 static void
PrintVar(const char * varname,bool expandVars)834 PrintVar(const char *varname, bool expandVars)
835 {
836 	if (strchr(varname, '$') != NULL) {
837 		char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_EVAL);
838 		/* TODO: handle errors */
839 		printf("%s\n", evalue);
840 		free(evalue);
841 
842 	} else if (expandVars) {
843 		char *expr = str_concat3("${", varname, "}");
844 		char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_EVAL);
845 		/* TODO: handle errors */
846 		free(expr);
847 		printf("%s\n", evalue);
848 		free(evalue);
849 
850 	} else {
851 		FStr value = Var_Value(SCOPE_GLOBAL, varname);
852 		printf("%s\n", value.str != NULL ? value.str : "");
853 		FStr_Done(&value);
854 	}
855 }
856 
857 /*
858  * Return a bool based on a variable.
859  *
860  * If the knob is not set, return the fallback.
861  * If set, anything that looks or smells like "No", "False", "Off", "0", etc.
862  * is false, otherwise true.
863  */
864 bool
GetBooleanExpr(const char * expr,bool fallback)865 GetBooleanExpr(const char *expr, bool fallback)
866 {
867 	char *value;
868 	bool res;
869 
870 	value = Var_Subst(expr, SCOPE_GLOBAL, VARE_EVAL);
871 	/* TODO: handle errors */
872 	res = ParseBoolean(value, fallback);
873 	free(value);
874 	return res;
875 }
876 
877 static void
doPrintVars(void)878 doPrintVars(void)
879 {
880 	StringListNode *ln;
881 	bool expandVars;
882 
883 	if (opts.printVars == PVM_EXPANDED)
884 		expandVars = true;
885 	else if (opts.debugVflag)
886 		expandVars = false;
887 	else
888 		expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}",
889 		    false);
890 
891 	for (ln = opts.variables.first; ln != NULL; ln = ln->next) {
892 		const char *varname = ln->datum;
893 		PrintVar(varname, expandVars);
894 	}
895 }
896 
897 static bool
runTargets(void)898 runTargets(void)
899 {
900 	GNodeList targs = LST_INIT;	/* target nodes to create */
901 	bool outOfDate;		/* false if all targets up to date */
902 
903 	/*
904 	 * Have now read the entire graph and need to make a list of
905 	 * targets to create. If none was given on the command line,
906 	 * we consult the parsing module to find the main target(s)
907 	 * to create.
908 	 */
909 	if (Lst_IsEmpty(&opts.create))
910 		Parse_MainName(&targs);
911 	else
912 		Targ_FindList(&targs, &opts.create);
913 
914 	if (!opts.compatMake) {
915 		/*
916 		 * Initialize job module before traversing the graph
917 		 * now that any .BEGIN and .END targets have been read.
918 		 * This is done only if the -q flag wasn't given
919 		 * (to prevent the .BEGIN from being executed should
920 		 * it exist).
921 		 */
922 		if (!opts.query) {
923 			Job_Init();
924 			jobsRunning = true;
925 		}
926 
927 		/* Traverse the graph, checking on all the targets */
928 		outOfDate = Make_Run(&targs);
929 	} else {
930 		Compat_MakeAll(&targs);
931 		outOfDate = false;
932 	}
933 	Lst_Done(&targs);	/* Don't free the targets themselves. */
934 	return outOfDate;
935 }
936 
937 /*
938  * Set up the .TARGETS variable to contain the list of targets to be created.
939  * If none specified, make the variable empty for now, the parser will fill
940  * in the default or .MAIN target later.
941  */
942 static void
InitVarTargets(void)943 InitVarTargets(void)
944 {
945 	StringListNode *ln;
946 
947 	if (Lst_IsEmpty(&opts.create)) {
948 		Global_Set(".TARGETS", "");
949 		return;
950 	}
951 
952 	for (ln = opts.create.first; ln != NULL; ln = ln->next) {
953 		const char *name = ln->datum;
954 		Global_Append(".TARGETS", name);
955 	}
956 }
957 
958 static void
InitRandom(void)959 InitRandom(void)
960 {
961 	struct timeval tv;
962 
963 	gettimeofday(&tv, NULL);
964 	srandom((unsigned int)(tv.tv_sec + tv.tv_usec));
965 }
966 
967 static const char *
InitVarMachine(const struct utsname * utsname MAKE_ATTR_UNUSED)968 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED)
969 {
970 #ifdef FORCE_MACHINE
971 	return FORCE_MACHINE;
972 #else
973     	const char *machine = getenv("MACHINE");
974 
975 	if (machine != NULL)
976 		return machine;
977 
978 #if defined(MAKE_NATIVE)
979 	return utsname->machine;
980 #elif defined(MAKE_MACHINE)
981 	return MAKE_MACHINE;
982 #else
983 	return "unknown";
984 #endif
985 #endif
986 }
987 
988 static const char *
InitVarMachineArch(void)989 InitVarMachineArch(void)
990 {
991 #ifdef FORCE_MACHINE_ARCH
992 	return FORCE_MACHINE_ARCH;
993 #else
994 	const char *env = getenv("MACHINE_ARCH");
995 	if (env != NULL)
996 		return env;
997 
998 #if defined(MAKE_NATIVE) && defined(CTL_HW)
999 	{
1000 		struct utsname utsname;
1001 		static char machine_arch_buf[sizeof utsname.machine];
1002 		const int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
1003 		size_t len = sizeof machine_arch_buf;
1004 
1005 		if (sysctl(mib, (unsigned int)__arraycount(mib),
1006 		    machine_arch_buf, &len, NULL, 0) < 0) {
1007 			(void)fprintf(stderr, "%s: sysctl failed (%s).\n",
1008 			    progname, strerror(errno));
1009 			exit(2);
1010 		}
1011 
1012 		return machine_arch_buf;
1013 	}
1014 #elif defined(MACHINE_ARCH)
1015 	return MACHINE_ARCH;
1016 #elif defined(MAKE_MACHINE_ARCH)
1017 	return MAKE_MACHINE_ARCH;
1018 #else
1019 	return "unknown";
1020 #endif
1021 #endif
1022 }
1023 
1024 #ifndef NO_PWD_OVERRIDE
1025 /*
1026  * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1027  * since the value of curdir can vary depending on how we got
1028  * here.  That is, sitting at a shell prompt (shell that provides $PWD)
1029  * or via subdir.mk, in which case it's likely a shell which does
1030  * not provide it.
1031  *
1032  * So, to stop it breaking this case only, we ignore PWD if
1033  * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression.
1034  */
1035 static void
HandlePWD(const struct stat * curdir_st)1036 HandlePWD(const struct stat *curdir_st)
1037 {
1038 	char *pwd;
1039 	FStr makeobjdir;
1040 	struct stat pwd_st;
1041 
1042 	if (ignorePWD || (pwd = getenv("PWD")) == NULL)
1043 		return;
1044 
1045 	if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"))
1046 		return;
1047 
1048 	makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR");
1049 	if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL)
1050 		goto ignore_pwd;
1051 
1052 	if (stat(pwd, &pwd_st) == 0 &&
1053 	    curdir_st->st_ino == pwd_st.st_ino &&
1054 	    curdir_st->st_dev == pwd_st.st_dev)
1055 		snprintf(curdir, MAXPATHLEN, "%s", pwd);
1056 
1057 ignore_pwd:
1058 	FStr_Done(&makeobjdir);
1059 }
1060 #endif
1061 
1062 /*
1063  * Find the .OBJDIR.  If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set
1064  * in the environment, try only that value and fall back to .CURDIR if it
1065  * does not exist.
1066  *
1067  * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
1068  * and finally _PATH_OBJDIRPREFIX`pwd`, in that order.  If none of these
1069  * paths exist, just use .CURDIR.
1070  */
1071 static void
InitObjdir(const char * machine,const char * machine_arch)1072 InitObjdir(const char *machine, const char *machine_arch)
1073 {
1074 	bool writable;
1075 
1076 	Dir_InitCur(curdir);
1077 	writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true);
1078 	(void)Main_SetObjdir(false, "%s", curdir);
1079 
1080 	if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) &&
1081 	    !SetVarObjdir(writable, "MAKEOBJDIR", "") &&
1082 	    !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
1083 	    !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) &&
1084 	    !Main_SetObjdir(writable, "%s", _PATH_OBJDIR))
1085 		(void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir);
1086 }
1087 
1088 /* get rid of resource limit on file descriptors */
1089 static void
UnlimitFiles(void)1090 UnlimitFiles(void)
1091 {
1092 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
1093 	struct rlimit rl;
1094 	if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
1095 	    rl.rlim_cur != rl.rlim_max) {
1096 #ifdef BMAKE_NOFILE_MAX
1097 		if (BMAKE_NOFILE_MAX < rl.rlim_max)
1098 			rl.rlim_cur = BMAKE_NOFILE_MAX;
1099 		else
1100 #endif
1101 		rl.rlim_cur = rl.rlim_max;
1102 		(void)setrlimit(RLIMIT_NOFILE, &rl);
1103 	}
1104 #endif
1105 }
1106 
1107 static void
CmdOpts_Init(void)1108 CmdOpts_Init(void)
1109 {
1110 	opts.compatMake = false;
1111 	memset(&opts.debug, 0, sizeof(opts.debug));
1112 	/* opts.debug_file has already been initialized earlier */
1113 	opts.strict = false;
1114 	opts.debugVflag = false;
1115 	opts.checkEnvFirst = false;
1116 	Lst_Init(&opts.makefiles);
1117 	opts.ignoreErrors = false;	/* Pay attention to non-zero returns */
1118 	opts.maxJobs = 1;
1119 	opts.keepgoing = false;		/* Stop on error */
1120 	opts.noRecursiveExecute = false; /* Execute all .MAKE targets */
1121 	opts.noExecute = false;		/* Execute all commands */
1122 	opts.query = false;
1123 	opts.noBuiltins = false;	/* Read the built-in rules */
1124 	opts.silent = false;		/* Print commands as executed */
1125 	opts.touch = false;
1126 	opts.printVars = PVM_NONE;
1127 	Lst_Init(&opts.variables);
1128 	opts.parseWarnFatal = false;
1129 	opts.enterFlag = false;
1130 	opts.varNoExportEnv = false;
1131 	Lst_Init(&opts.create);
1132 }
1133 
1134 /*
1135  * Initialize MAKE and .MAKE to the path of the executable, so that it can be
1136  * found by execvp(3) and the shells, even after a chdir.
1137  *
1138  * If it's a relative path and contains a '/', resolve it to an absolute path.
1139  * Otherwise keep it as is, assuming it will be found in the PATH.
1140  */
1141 static void
InitVarMake(const char * argv0)1142 InitVarMake(const char *argv0)
1143 {
1144 	const char *make = argv0;
1145 	char pathbuf[MAXPATHLEN];
1146 
1147 	if (argv0[0] != '/' && strchr(argv0, '/') != NULL) {
1148 		const char *abspath = cached_realpath(argv0, pathbuf);
1149 		struct stat st;
1150 		if (abspath != NULL && abspath[0] == '/' &&
1151 		    stat(make, &st) == 0)
1152 			make = abspath;
1153 	}
1154 
1155 	Global_Set("MAKE", make);
1156 	Global_Set(".MAKE", make);
1157 }
1158 
1159 /*
1160  * Add the directories from the colon-separated syspath to defSysIncPath.
1161  * After returning, the contents of syspath is unspecified.
1162  */
1163 static void
InitDefSysIncPath(char * syspath)1164 InitDefSysIncPath(char *syspath)
1165 {
1166 	static char defsyspath[] = _PATH_DEFSYSPATH;
1167 	char *start, *p;
1168 
1169 	/*
1170 	 * If no user-supplied system path was given (through the -m option)
1171 	 * add the directories from the DEFSYSPATH (more than one may be given
1172 	 * as dir1:...:dirn) to the system include path.
1173 	 */
1174 	if (syspath == NULL || syspath[0] == '\0')
1175 		syspath = defsyspath;
1176 	else
1177 		syspath = bmake_strdup(syspath);
1178 
1179 	for (start = syspath; *start != '\0'; start = p) {
1180 		for (p = start; *p != '\0' && *p != ':'; p++)
1181 			continue;
1182 		if (*p == ':')
1183 			*p++ = '\0';
1184 
1185 		/* look for magic parent directory search string */
1186 		if (strncmp(start, ".../", 4) == 0) {
1187 			char *dir = Dir_FindHereOrAbove(curdir, start + 4);
1188 			if (dir != NULL) {
1189 				(void)SearchPath_Add(defSysIncPath, dir);
1190 				free(dir);
1191 			}
1192 		} else {
1193 			(void)SearchPath_Add(defSysIncPath, start);
1194 		}
1195 	}
1196 
1197 	if (syspath != defsyspath)
1198 		free(syspath);
1199 }
1200 
1201 static void
ReadBuiltinRules(void)1202 ReadBuiltinRules(void)
1203 {
1204 	StringListNode *ln;
1205 	StringList sysMkFiles = LST_INIT;
1206 
1207 	SearchPath_Expand(
1208 	    Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath,
1209 	    _PATH_DEFSYSMK,
1210 	    &sysMkFiles);
1211 	if (Lst_IsEmpty(&sysMkFiles))
1212 		Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK);
1213 
1214 	for (ln = sysMkFiles.first; ln != NULL; ln = ln->next)
1215 		if (ReadMakefile(ln->datum))
1216 			break;
1217 
1218 	if (ln == NULL)
1219 		Fatal("%s: cannot open %s.",
1220 		    progname, (const char *)sysMkFiles.first->datum);
1221 
1222 	Lst_DoneFree(&sysMkFiles);
1223 }
1224 
1225 static void
InitMaxJobs(void)1226 InitMaxJobs(void)
1227 {
1228 	char *value;
1229 	int n;
1230 
1231 	if (forceJobs || opts.compatMake ||
1232 	    !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS"))
1233 		return;
1234 
1235 	value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_EVAL);
1236 	/* TODO: handle errors */
1237 	n = (int)strtol(value, NULL, 0);
1238 	if (n < 1) {
1239 		(void)fprintf(stderr,
1240 		    "%s: illegal value for .MAKE.JOBS "
1241 		    "-- must be positive integer!\n",
1242 		    progname);
1243 		exit(2);	/* Not 1 so -q can distinguish error */
1244 	}
1245 
1246 	if (n != opts.maxJobs) {
1247 		Global_Append(MAKEFLAGS, "-j");
1248 		Global_Append(MAKEFLAGS, value);
1249 	}
1250 
1251 	opts.maxJobs = n;
1252 	maxJobTokens = opts.maxJobs;
1253 	forceJobs = true;
1254 	free(value);
1255 }
1256 
1257 /*
1258  * For compatibility, look at the directories in the VPATH variable
1259  * and add them to the search path, if the variable is defined. The
1260  * variable's value is in the same format as the PATH environment
1261  * variable, i.e. <directory>:<directory>:<directory>...
1262  */
1263 static void
InitVpath(void)1264 InitVpath(void)
1265 {
1266 	char *vpath, savec, *path;
1267 	if (!Var_Exists(SCOPE_CMDLINE, "VPATH"))
1268 		return;
1269 
1270 	vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_EVAL);
1271 	/* TODO: handle errors */
1272 	path = vpath;
1273 	do {
1274 		char *p;
1275 		/* skip to end of directory */
1276 		for (p = path; *p != ':' && *p != '\0'; p++)
1277 			continue;
1278 		/* Save terminator character so know when to stop */
1279 		savec = *p;
1280 		*p = '\0';
1281 		/* Add directory to search path */
1282 		(void)SearchPath_Add(&dirSearchPath, path);
1283 		*p = savec;
1284 		path = p + 1;
1285 	} while (savec == ':');
1286 	free(vpath);
1287 }
1288 
1289 static void
ReadAllMakefiles(const StringList * makefiles)1290 ReadAllMakefiles(const StringList *makefiles)
1291 {
1292 	StringListNode *ln;
1293 
1294 	for (ln = makefiles->first; ln != NULL; ln = ln->next) {
1295 		const char *fname = ln->datum;
1296 		if (!ReadMakefile(fname))
1297 			Fatal("%s: cannot open %s.", progname, fname);
1298 	}
1299 }
1300 
1301 static void
ReadFirstDefaultMakefile(void)1302 ReadFirstDefaultMakefile(void)
1303 {
1304 	StringList makefiles = LST_INIT;
1305 	StringListNode *ln;
1306 	char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}",
1307 	    SCOPE_CMDLINE, VARE_EVAL);
1308 	/* TODO: handle errors */
1309 
1310 	AppendWords(&makefiles, prefs);
1311 
1312 	for (ln = makefiles.first; ln != NULL; ln = ln->next)
1313 		if (ReadMakefile(ln->datum))
1314 			break;
1315 
1316 	Lst_Done(&makefiles);
1317 	free(prefs);
1318 }
1319 
1320 /*
1321  * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS.
1322  * Initialize a few modules.
1323  * Parse the arguments from MAKEFLAGS and the command line.
1324  */
1325 static void
main_Init(int argc,char ** argv)1326 main_Init(int argc, char **argv)
1327 {
1328 	struct stat sa;
1329 	const char *machine;
1330 	const char *machine_arch;
1331 	char *syspath = getenv("MAKESYSPATH");
1332 	struct utsname utsname;
1333 
1334 	/* default to writing debug to stderr */
1335 	opts.debug_file = stderr;
1336 
1337 	Str_Intern_Init();
1338 	HashTable_Init(&cached_realpaths);
1339 
1340 #ifdef SIGINFO
1341 	(void)bmake_signal(SIGINFO, siginfo);
1342 #endif
1343 
1344 	InitRandom();
1345 
1346 	progname = str_basename(argv[0]);
1347 
1348 	UnlimitFiles();
1349 
1350 	if (uname(&utsname) == -1) {
1351 		(void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
1352 		    strerror(errno));
1353 		exit(2);
1354 	}
1355 
1356 	machine = InitVarMachine(&utsname);
1357 	machine_arch = InitVarMachineArch();
1358 
1359 	myPid = getpid();	/* remember this for vFork() */
1360 
1361 	/* Just in case MAKEOBJDIR wants us to do something tricky. */
1362 	Targ_Init();
1363 #ifdef FORCE_MAKE_OS
1364 	Global_Set_ReadOnly(".MAKE.OS", FORCE_MAKE_OS);
1365 #else
1366 	Global_Set_ReadOnly(".MAKE.OS", utsname.sysname);
1367 #endif
1368 	Global_Set("MACHINE", machine);
1369 	Global_Set("MACHINE_ARCH", machine_arch);
1370 #ifdef MAKE_VERSION
1371 	Global_Set("MAKE_VERSION", MAKE_VERSION);
1372 #endif
1373 	Global_Set_ReadOnly(".newline", "\n");
1374 #ifndef MAKEFILE_PREFERENCE_LIST
1375 	/* This is the traditional preference for makefiles. */
1376 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
1377 #endif
1378 	Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST);
1379 	Global_Set(".MAKE.DEPENDFILE", ".depend");
1380 	/* Tell makefiles like jobs.mk whether we support -jC */
1381 #ifdef _SC_NPROCESSORS_ONLN
1382 	Global_Set_ReadOnly(".MAKE.JOBS.C", "yes");
1383 #else
1384 	Global_Set_ReadOnly(".MAKE.JOBS.C", "no");
1385 #endif
1386 
1387 	CmdOpts_Init();
1388 	allPrecious = false;	/* Remove targets when interrupted */
1389 	deleteOnError = false;	/* Historical default behavior */
1390 	jobsRunning = false;
1391 
1392 	maxJobTokens = opts.maxJobs;
1393 	ignorePWD = false;
1394 
1395 	/*
1396 	 * Initialize the parsing, directory and variable modules to prepare
1397 	 * for the reading of inclusion paths and variable settings on the
1398 	 * command line
1399 	 */
1400 
1401 	/*
1402 	 * Initialize various variables.
1403 	 *	MAKE also gets this name, for compatibility
1404 	 *	.MAKEFLAGS gets set to the empty string just in case.
1405 	 *	MFLAGS also gets initialized empty, for compatibility.
1406 	 */
1407 	Parse_Init();
1408 	InitVarMake(argv[0]);
1409 	Global_Set(MAKEFLAGS, "");
1410 	Global_Set(".MAKEOVERRIDES", "");
1411 	Global_Set("MFLAGS", "");
1412 	Global_Set(".ALLTARGETS", "");
1413 	Global_Set_ReadOnly(".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV);
1414 
1415 	/* Set some other useful variables. */
1416 	{
1417 		char buf[64], *ep = getenv(MAKE_LEVEL_ENV);
1418 
1419 		makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0;
1420 		if (makelevel < 0)
1421 			makelevel = 0;
1422 		snprintf(buf, sizeof buf, "%d", makelevel);
1423 		Global_Set(".MAKE.LEVEL", buf);
1424 		snprintf(buf, sizeof buf, "%u", myPid);
1425 		Global_Set_ReadOnly(".MAKE.PID", buf);
1426 		snprintf(buf, sizeof buf, "%u", getppid());
1427 		Global_Set_ReadOnly(".MAKE.PPID", buf);
1428 		snprintf(buf, sizeof buf, "%u", getuid());
1429 		Global_Set_ReadOnly(".MAKE.UID", buf);
1430 		snprintf(buf, sizeof buf, "%u", getgid());
1431 		Global_Set_ReadOnly(".MAKE.GID", buf);
1432 	}
1433 	if (makelevel > 0) {
1434 		char pn[1024];
1435 		snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel);
1436 		progname = bmake_strdup(pn);
1437 	}
1438 
1439 #ifdef USE_META
1440 	meta_init();
1441 #endif
1442 	Dir_Init();
1443 
1444 	{
1445 		char *makeflags = explode(getenv("MAKEFLAGS"));
1446 		Main_ParseArgLine(makeflags);
1447 		free(makeflags);
1448 	}
1449 
1450 	if (getcwd(curdir, MAXPATHLEN) == NULL) {
1451 		(void)fprintf(stderr, "%s: getcwd: %s.\n",
1452 		    progname, strerror(errno));
1453 		exit(2);
1454 	}
1455 
1456 	MainParseArgs(argc, argv);
1457 
1458 	if (opts.enterFlag)
1459 		printf("%s: Entering directory `%s'\n", progname, curdir);
1460 
1461 	if (stat(curdir, &sa) == -1) {
1462 		(void)fprintf(stderr, "%s: %s: %s.\n",
1463 		    progname, curdir, strerror(errno));
1464 		exit(2);
1465 	}
1466 
1467 #ifndef NO_PWD_OVERRIDE
1468 	HandlePWD(&sa);
1469 #endif
1470 	Global_Set(".CURDIR", curdir);
1471 
1472 	InitObjdir(machine, machine_arch);
1473 
1474 	Arch_Init();
1475 	Suff_Init();
1476 	Trace_Init(tracefile);
1477 
1478 	defaultNode = NULL;
1479 	(void)time(&now);
1480 
1481 	Trace_Log(MAKESTART, NULL);
1482 
1483 	InitVarTargets();
1484 
1485 	InitDefSysIncPath(syspath);
1486 }
1487 
1488 /*
1489  * Read the system makefile followed by either makefile, Makefile or the
1490  * files given by the -f option. Exit on parse errors.
1491  */
1492 static void
main_ReadFiles(void)1493 main_ReadFiles(void)
1494 {
1495 
1496 	if (Lst_IsEmpty(&sysIncPath->dirs))
1497 		SearchPath_AddAll(sysIncPath, defSysIncPath);
1498 
1499 	Dir_SetSYSPATH();
1500 	if (!opts.noBuiltins)
1501 		ReadBuiltinRules();
1502 
1503 	posix_state = PS_MAYBE_NEXT_LINE;
1504 	if (!Lst_IsEmpty(&opts.makefiles))
1505 		ReadAllMakefiles(&opts.makefiles);
1506 	else
1507 		ReadFirstDefaultMakefile();
1508 }
1509 
1510 /* Compute the dependency graph. */
1511 static void
main_PrepareMaking(void)1512 main_PrepareMaking(void)
1513 {
1514 	/* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1515 	if (!opts.noBuiltins || opts.printVars == PVM_NONE) {
1516 		makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}",
1517 		    SCOPE_CMDLINE, VARE_EVAL);
1518 		if (makeDependfile[0] != '\0') {
1519 			/* TODO: handle errors */
1520 			doing_depend = true;
1521 			(void)ReadMakefile(makeDependfile);
1522 			doing_depend = false;
1523 		}
1524 	}
1525 
1526 	if (enterFlagObj)
1527 		printf("%s: Entering directory `%s'\n", progname, objdir);
1528 
1529 	MakeMode();
1530 
1531 	{
1532 		FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS);
1533 		Global_Append("MFLAGS", makeflags.str);
1534 		FStr_Done(&makeflags);
1535 	}
1536 
1537 	InitMaxJobs();
1538 
1539 	if (!opts.compatMake && !forceJobs)
1540 		opts.compatMake = true;
1541 
1542 	if (!opts.compatMake)
1543 		Job_ServerStart(maxJobTokens, jp_0, jp_1);
1544 	DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1545 	    jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0);
1546 
1547 	if (opts.printVars == PVM_NONE)
1548 		Main_ExportMAKEFLAGS(true);	/* initial export */
1549 
1550 	InitVpath();
1551 
1552 	/*
1553 	 * Now that all search paths have been read for suffixes et al, it's
1554 	 * time to add the default search path to their lists...
1555 	 */
1556 	Suff_ExtendPaths();
1557 
1558 	/*
1559 	 * Propagate attributes through :: dependency lists.
1560 	 */
1561 	Targ_Propagate();
1562 
1563 	/* print the initial graph, if the user requested it */
1564 	if (DEBUG(GRAPH1))
1565 		Targ_PrintGraph(1);
1566 }
1567 
1568 /*
1569  * Make the targets.
1570  * If the -v or -V options are given, print variables instead.
1571  * Return whether any of the targets is out-of-date.
1572  */
1573 static bool
main_Run(void)1574 main_Run(void)
1575 {
1576 	if (opts.printVars != PVM_NONE) {
1577 		/* print the values of any variables requested by the user */
1578 		doPrintVars();
1579 		return false;
1580 	} else {
1581 		return runTargets();
1582 	}
1583 }
1584 
1585 /* Clean up after making the targets. */
1586 static void
main_CleanUp(void)1587 main_CleanUp(void)
1588 {
1589 #ifdef CLEANUP
1590 	Lst_DoneFree(&opts.variables);
1591 	Lst_DoneFree(&opts.makefiles);
1592 	Lst_DoneFree(&opts.create);
1593 #endif
1594 
1595 	if (DEBUG(GRAPH2))
1596 		Targ_PrintGraph(2);
1597 
1598 	Trace_Log(MAKEEND, NULL);
1599 
1600 	if (enterFlagObj)
1601 		printf("%s: Leaving directory `%s'\n", progname, objdir);
1602 	if (opts.enterFlag)
1603 		printf("%s: Leaving directory `%s'\n", progname, curdir);
1604 
1605 	Var_Stats();
1606 	Targ_Stats();
1607 
1608 #ifdef USE_META
1609 	meta_finish();
1610 #endif
1611 #ifdef CLEANUP
1612 	Suff_End();
1613 	Targ_End();
1614 	Arch_End();
1615 	Parse_End();
1616 	Dir_End();
1617 	Job_End();
1618 #endif
1619 	Trace_End();
1620 #ifdef CLEANUP
1621 	Str_Intern_End();
1622 #endif
1623 }
1624 
1625 /* Determine the exit code. */
1626 static int
main_Exit(bool outOfDate)1627 main_Exit(bool outOfDate)
1628 {
1629 	if ((opts.strict && main_errors > 0) || parseErrors > 0)
1630 		return 2;	/* Not 1 so -q can distinguish error */
1631 	return outOfDate ? 1 : 0;
1632 }
1633 
1634 int
main(int argc,char ** argv)1635 main(int argc, char **argv)
1636 {
1637 	bool outOfDate;
1638 
1639 	main_Init(argc, argv);
1640 	main_ReadFiles();
1641 	main_PrepareMaking();
1642 	outOfDate = main_Run();
1643 	main_CleanUp();
1644 	return main_Exit(outOfDate);
1645 }
1646 
1647 /*
1648  * Open and parse the given makefile, with all its side effects.
1649  * Return false if the file could not be opened.
1650  */
1651 static bool
ReadMakefile(const char * fname)1652 ReadMakefile(const char *fname)
1653 {
1654 	int fd;
1655 	char *name, *path = NULL;
1656 
1657 	if (strcmp(fname, "-") == 0) {
1658 		Parse_File("(stdin)", -1);
1659 		Var_Set(SCOPE_INTERNAL, "MAKEFILE", "");
1660 	} else {
1661 		/* if we've chdir'd, rebuild the path name */
1662 		if (strcmp(curdir, objdir) != 0 && *fname != '/') {
1663 			path = str_concat3(curdir, "/", fname);
1664 			fd = open(path, O_RDONLY);
1665 			if (fd != -1) {
1666 				fname = path;
1667 				goto found;
1668 			}
1669 			free(path);
1670 
1671 			/* If curdir failed, try objdir (ala .depend) */
1672 			path = str_concat3(objdir, "/", fname);
1673 			fd = open(path, O_RDONLY);
1674 			if (fd != -1) {
1675 				fname = path;
1676 				goto found;
1677 			}
1678 		} else {
1679 			fd = open(fname, O_RDONLY);
1680 			if (fd != -1)
1681 				goto found;
1682 		}
1683 		/* look in -I and system include directories. */
1684 		name = Dir_FindFile(fname, parseIncPath);
1685 		if (name == NULL) {
1686 			SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs)
1687 			    ? defSysIncPath : sysIncPath;
1688 			name = Dir_FindFile(fname, sysInc);
1689 		}
1690 		if (name == NULL || (fd = open(name, O_RDONLY)) == -1) {
1691 			free(name);
1692 			free(path);
1693 			return false;
1694 		}
1695 		fname = name;
1696 		/*
1697 		 * set the MAKEFILE variable desired by System V fans -- the
1698 		 * placement of the setting here means it gets set to the last
1699 		 * makefile specified, as it is set by SysV make.
1700 		 */
1701 found:
1702 		if (!doing_depend)
1703 			Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname);
1704 		Parse_File(fname, fd);
1705 	}
1706 	free(path);
1707 	return true;
1708 }
1709 
1710 /* populate av for Cmd_Exec and Compat_RunCommand */
1711 int
Cmd_Argv(const char * cmd,size_t cmd_len,const char ** av,size_t avsz,char * cmd_file,size_t cmd_filesz,bool eflag,bool xflag)1712 Cmd_Argv(const char *cmd, size_t cmd_len, const char **av, size_t avsz,
1713     char *cmd_file, size_t cmd_filesz, bool eflag, bool xflag)
1714 {
1715 	int ac = 0;
1716 	int cmd_fd = -1;
1717 
1718 	if (shellPath == NULL)
1719 		Shell_Init();
1720 
1721 	if (cmd_file != NULL) {
1722 		if (cmd_len == 0)
1723 			cmd_len = strlen(cmd);
1724 
1725 		if (cmd_len > MAKE_CMDLEN_LIMIT) {
1726 			cmd_fd = mkTempFile(NULL, cmd_file, cmd_filesz);
1727 			if (cmd_fd >= 0) {
1728 				ssize_t n;
1729 
1730 				n = write(cmd_fd, cmd, cmd_len);
1731 				close(cmd_fd);
1732 				if (n < (ssize_t)cmd_len) {
1733 					unlink(cmd_file);
1734 					cmd_fd = -1;
1735 				}
1736 			}
1737 		} else
1738 			cmd_file[0] = '\0';
1739 	}
1740 
1741 	if (avsz < 4 || (eflag && avsz < 5))
1742 		return -1;
1743 
1744 	/* The following works for any of the builtin shell specs. */
1745 	av[ac++] = shellPath;
1746 	if (eflag)
1747 		av[ac++] = shellErrFlag;
1748 	if (cmd_fd >= 0) {
1749 		if (xflag)
1750 			av[ac++] = "-x";
1751 		av[ac++] = cmd_file;
1752 	} else {
1753 		av[ac++] = xflag ? "-xc" : "-c";
1754 		av[ac++] = cmd;
1755 	}
1756 	av[ac] = NULL;
1757 	return ac;
1758 }
1759 
1760 /*
1761  * Execute the command in cmd, and return its output (only stdout, not
1762  * stderr, possibly empty).  In the output, replace newlines with spaces.
1763  */
1764 char *
Cmd_Exec(const char * cmd,char ** error)1765 Cmd_Exec(const char *cmd, char **error)
1766 {
1767 	const char *args[4];	/* Arguments for invoking the shell */
1768 	int pipefds[2];
1769 	int cpid;		/* Child PID */
1770 	int pid;		/* PID from wait() */
1771 	int status;		/* command exit status */
1772 	Buffer buf;		/* buffer to store the result */
1773 	ssize_t bytes_read;
1774 	char *output;
1775 	char *p;
1776 	int saved_errno;
1777 	char cmd_file[MAXPATHLEN];
1778 
1779 	DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd);
1780 
1781 	if (Cmd_Argv(cmd, 0, args, 4, cmd_file, sizeof(cmd_file), false, false) < 0
1782 	    || pipe(pipefds) == -1) {
1783 		*error = str_concat3(
1784 		    "Couldn't create pipe for \"", cmd, "\"");
1785 		return bmake_strdup("");
1786 	}
1787 
1788 	Var_ReexportVars(SCOPE_GLOBAL);
1789 
1790 	switch (cpid = vfork()) {
1791 	case 0:
1792 		(void)close(pipefds[0]);
1793 		(void)dup2(pipefds[1], STDOUT_FILENO);
1794 		(void)close(pipefds[1]);
1795 
1796 		(void)execv(shellPath, UNCONST(args));
1797 		_exit(1);
1798 		/* NOTREACHED */
1799 
1800 	case -1:
1801 		*error = str_concat3("Couldn't exec \"", cmd, "\"");
1802 		return bmake_strdup("");
1803 	}
1804 
1805 	(void)close(pipefds[1]);	/* No need for the writing half */
1806 
1807 	saved_errno = 0;
1808 	Buf_Init(&buf);
1809 
1810 	do {
1811 		char result[BUFSIZ];
1812 		bytes_read = read(pipefds[0], result, sizeof result);
1813 		if (bytes_read > 0)
1814 			Buf_AddBytes(&buf, result, (size_t)bytes_read);
1815 	} while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR));
1816 	if (bytes_read == -1)
1817 		saved_errno = errno;
1818 
1819 	(void)close(pipefds[0]); /* Close the input side of the pipe. */
1820 
1821 	while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0)
1822 		JobReapChild(pid, status, false);
1823 
1824 	if (Buf_EndsWith(&buf, '\n'))
1825 		buf.data[buf.len - 1] = '\0';
1826 
1827 	output = Buf_DoneData(&buf);
1828 	for (p = output; *p != '\0'; p++)
1829 		if (*p == '\n')
1830 			*p = ' ';
1831 
1832 	if (WIFSIGNALED(status))
1833 		*error = str_concat3("\"", cmd, "\" exited on a signal");
1834 	else if (WEXITSTATUS(status) != 0) {
1835 		Buffer errBuf;
1836 		Buf_Init(&errBuf);
1837 		Buf_AddStr(&errBuf, "Command \"");
1838 		Buf_AddStr(&errBuf, cmd);
1839 		Buf_AddStr(&errBuf, "\" exited with status ");
1840 		Buf_AddInt(&errBuf, WEXITSTATUS(status));
1841 		*error = Buf_DoneData(&errBuf);
1842 	} else if (saved_errno != 0)
1843 		*error = str_concat3(
1844 		    "Couldn't read shell's output for \"", cmd, "\"");
1845 	else
1846 		*error = NULL;
1847 	if (cmd_file[0] != '\0')
1848 		unlink(cmd_file);
1849 	return output;
1850 }
1851 
1852 /*
1853  * Print a printf-style error message.
1854  *
1855  * In default mode, this error message has no consequences, for compatibility
1856  * reasons, in particular it does not affect the exit status.  Only in lint
1857  * mode (-dL) it does.
1858  */
1859 void
Error(const char * fmt,...)1860 Error(const char *fmt, ...)
1861 {
1862 	va_list ap;
1863 	FILE *f;
1864 
1865 	f = opts.debug_file;
1866 	if (f == stdout)
1867 		f = stderr;
1868 	(void)fflush(stdout);
1869 
1870 	for (;;) {
1871 		fprintf(f, "%s: ", progname);
1872 		va_start(ap, fmt);
1873 		(void)vfprintf(f, fmt, ap);
1874 		va_end(ap);
1875 		(void)fprintf(f, "\n");
1876 		(void)fflush(f);
1877 		if (f == stderr)
1878 			break;
1879 		f = stderr;
1880 	}
1881 	main_errors++;
1882 }
1883 
1884 /*
1885  * Wait for any running jobs to finish, then produce an error message,
1886  * finally exit immediately.
1887  *
1888  * Exiting immediately differs from Parse_Error, which exits only after the
1889  * current top-level makefile has been parsed completely.
1890  */
1891 void
Fatal(const char * fmt,...)1892 Fatal(const char *fmt, ...)
1893 {
1894 	va_list ap;
1895 
1896 	if (jobsRunning)
1897 		Job_Wait();
1898 
1899 	(void)fflush(stdout);
1900 	fprintf(stderr, "%s: ", progname);
1901 	va_start(ap, fmt);
1902 	(void)vfprintf(stderr, fmt, ap);
1903 	va_end(ap);
1904 	(void)fprintf(stderr, "\n");
1905 	(void)fflush(stderr);
1906 	PrintStackTrace(true);
1907 
1908 	PrintOnError(NULL, "\n");
1909 
1910 	if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1911 		Targ_PrintGraph(2);
1912 	Trace_Log(MAKEERROR, NULL);
1913 	exit(2);		/* Not 1 so -q can distinguish error */
1914 }
1915 
1916 /*
1917  * Major exception once jobs are being created.
1918  * Kills all jobs, prints a message and exits.
1919  */
1920 void
Punt(const char * fmt,...)1921 Punt(const char *fmt, ...)
1922 {
1923 	va_list ap;
1924 
1925 	(void)fflush(stdout);
1926 	(void)fprintf(stderr, "%s: ", progname);
1927 	va_start(ap, fmt);
1928 	(void)vfprintf(stderr, fmt, ap);
1929 	va_end(ap);
1930 	(void)fprintf(stderr, "\n");
1931 	(void)fflush(stderr);
1932 
1933 	PrintOnError(NULL, "\n");
1934 
1935 	DieHorribly();
1936 }
1937 
1938 /* Exit without giving a message. */
1939 void
DieHorribly(void)1940 DieHorribly(void)
1941 {
1942 	if (jobsRunning)
1943 		Job_AbortAll();
1944 	if (DEBUG(GRAPH2))
1945 		Targ_PrintGraph(2);
1946 	Trace_Log(MAKEERROR, NULL);
1947 	exit(2);		/* Not 1 so -q can distinguish error */
1948 }
1949 
1950 /*
1951  * Called when aborting due to errors in child shell to signal abnormal exit.
1952  * The program exits.
1953  * Errors is the number of errors encountered in Make_Make.
1954  */
1955 void
Finish(int errs)1956 Finish(int errs)
1957 {
1958 	if (shouldDieQuietly(NULL, -1))
1959 		exit(2);
1960 	Fatal("%d error%s", errs, errs == 1 ? "" : "s");
1961 }
1962 
1963 int
unlink_file(const char * file)1964 unlink_file(const char *file)
1965 {
1966 	struct stat st;
1967 
1968 	if (lstat(file, &st) == -1)
1969 		return -1;
1970 
1971 	if (S_ISDIR(st.st_mode)) {
1972 		/*
1973 		 * POSIX says for unlink: "The path argument shall not name
1974 		 * a directory unless [...]".
1975 		 */
1976 		errno = EISDIR;
1977 		return -1;
1978 	}
1979 	return unlink(file);
1980 }
1981 
1982 static void
write_all(int fd,const void * data,size_t n)1983 write_all(int fd, const void *data, size_t n)
1984 {
1985 	const char *mem = data;
1986 
1987 	while (n > 0) {
1988 		ssize_t written = write(fd, mem, n);
1989 		/* XXX: Should this EAGAIN be EINTR? */
1990 		if (written == -1 && errno == EAGAIN)
1991 			continue;
1992 		if (written == -1)
1993 			break;
1994 		mem += written;
1995 		n -= (size_t)written;
1996 	}
1997 }
1998 
1999 /* Print why exec failed, avoiding stdio. */
2000 void MAKE_ATTR_DEAD
execDie(const char * af,const char * av)2001 execDie(const char *af, const char *av)
2002 {
2003 	Buffer buf;
2004 
2005 	Buf_Init(&buf);
2006 	Buf_AddStr(&buf, progname);
2007 	Buf_AddStr(&buf, ": ");
2008 	Buf_AddStr(&buf, af);
2009 	Buf_AddStr(&buf, "(");
2010 	Buf_AddStr(&buf, av);
2011 	Buf_AddStr(&buf, ") failed (");
2012 	Buf_AddStr(&buf, strerror(errno));
2013 	Buf_AddStr(&buf, ")\n");
2014 
2015 	write_all(STDERR_FILENO, buf.data, buf.len);
2016 
2017 	Buf_Done(&buf);
2018 	_exit(1);
2019 }
2020 
2021 static void
purge_relative_cached_realpaths(void)2022 purge_relative_cached_realpaths(void)
2023 {
2024 	HashIter hi;
2025 	bool more;
2026 
2027 	HashIter_Init(&hi, &cached_realpaths);
2028 	more = HashIter_Next(&hi);
2029 	while (more) {
2030 		HashEntry *he = hi.entry;
2031 		more = HashIter_Next(&hi);
2032 		if (he->key[0] != '/') {
2033 			DEBUG1(DIR, "cached_realpath: purging %s\n", he->key);
2034 			free(he->value);
2035 			HashTable_DeleteEntry(&cached_realpaths, he);
2036 		}
2037 	}
2038 }
2039 
2040 const char *
cached_realpath(const char * pathname,char * resolved)2041 cached_realpath(const char *pathname, char *resolved)
2042 {
2043 	const char *rp;
2044 
2045 	if (pathname == NULL || pathname[0] == '\0')
2046 		return NULL;
2047 
2048 	rp = HashTable_FindValue(&cached_realpaths, pathname);
2049 	if (rp != NULL) {
2050 		snprintf(resolved, MAXPATHLEN, "%s", rp);
2051 		return resolved;
2052 	}
2053 
2054 	rp = realpath(pathname, resolved);
2055 	if (rp != NULL) {
2056 		HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp));
2057 		DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp);
2058 		return resolved;
2059 	}
2060 
2061 	/* should we negative-cache? */
2062 	return NULL;
2063 }
2064 
2065 /*
2066  * Return true if we should die without noise.
2067  * For example our failing child was a sub-make or failure happened elsewhere.
2068  */
2069 bool
shouldDieQuietly(GNode * gn,int bf)2070 shouldDieQuietly(GNode *gn, int bf)
2071 {
2072 	static int quietly = -1;
2073 
2074 	if (quietly < 0) {
2075 		if (DEBUG(JOB) ||
2076 		    !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true))
2077 			quietly = 0;
2078 		else if (bf >= 0)
2079 			quietly = bf;
2080 		else
2081 			quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0;
2082 	}
2083 	return quietly != 0;
2084 }
2085 
2086 static void
SetErrorVars(GNode * gn)2087 SetErrorVars(GNode *gn)
2088 {
2089 	StringListNode *ln;
2090 	char sts[16];
2091 
2092 	/*
2093 	 * We can print this even if there is no .ERROR target.
2094 	 */
2095 	snprintf(sts, sizeof(sts), "%d", gn->exit_status);
2096 	Global_Set(".ERROR_EXIT", sts);
2097 	Global_Set(".ERROR_TARGET", gn->name);
2098 	Global_Delete(".ERROR_CMD");
2099 
2100 	for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
2101 		const char *cmd = ln->datum;
2102 
2103 		if (cmd == NULL)
2104 			break;
2105 		Global_Append(".ERROR_CMD", cmd);
2106 	}
2107 }
2108 
2109 /*
2110  * Print some helpful information in case of an error.
2111  * The caller should exit soon after calling this function.
2112  */
2113 void
PrintOnError(GNode * gn,const char * msg)2114 PrintOnError(GNode *gn, const char *msg)
2115 {
2116 	static GNode *errorNode = NULL;
2117 	StringListNode *ln;
2118 
2119 	if (DEBUG(HASH)) {
2120 		Targ_Stats();
2121 		Var_Stats();
2122 	}
2123 
2124 	if (errorNode != NULL)
2125 		return;		/* we've been here! */
2126 
2127 	printf("%s%s: stopped", msg, progname);
2128 	ln = opts.create.first;
2129 	if (ln != NULL || mainNode != NULL) {
2130 		printf(" making \"");
2131 		if (ln != NULL) {
2132 			printf("%s", (const char *)ln->datum);
2133 			for (ln = ln->next; ln != NULL; ln = ln->next)
2134 				printf(" %s", (const char *)ln->datum);
2135 		} else
2136 			printf("%s", mainNode->name);
2137 		printf("\"");
2138 	}
2139 	printf(" in %s\n", curdir);
2140 
2141 	/* we generally want to keep quiet if a sub-make died */
2142 	if (shouldDieQuietly(gn, -1))
2143 		return;
2144 
2145 	if (gn != NULL)
2146 		SetErrorVars(gn);
2147 
2148 	{
2149 		char *errorVarsValues = Var_Subst(
2150 		    "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
2151 		    SCOPE_GLOBAL, VARE_EVAL);
2152 		/* TODO: handle errors */
2153 		printf("%s", errorVarsValues);
2154 		free(errorVarsValues);
2155 	}
2156 
2157 	fflush(stdout);
2158 
2159 	/*
2160 	 * Finally, see if there is a .ERROR target, and run it if so.
2161 	 */
2162 	errorNode = Targ_FindNode(".ERROR");
2163 	if (errorNode != NULL) {
2164 		errorNode->type |= OP_SPECIAL;
2165 		Compat_Make(errorNode, errorNode);
2166 	}
2167 }
2168 
2169 void
Main_ExportMAKEFLAGS(bool first)2170 Main_ExportMAKEFLAGS(bool first)
2171 {
2172 	static bool once = true;
2173 	char *flags;
2174 
2175 	if (once != first)
2176 		return;
2177 	once = false;
2178 
2179 	flags = Var_Subst(
2180 	    "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
2181 	    SCOPE_CMDLINE, VARE_EVAL);
2182 	/* TODO: handle errors */
2183 	if (flags[0] != '\0')
2184 		setenv("MAKEFLAGS", flags, 1);
2185 	free(flags);
2186 }
2187 
2188 char *
getTmpdir(void)2189 getTmpdir(void)
2190 {
2191 	static char *tmpdir = NULL;
2192 	struct stat st;
2193 
2194 	if (tmpdir != NULL)
2195 		return tmpdir;
2196 
2197 	/* Honor $TMPDIR if it is valid, strip a trailing '/'. */
2198 	tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/",
2199 	    SCOPE_GLOBAL, VARE_EVAL);
2200 	/* TODO: handle errors */
2201 
2202 	if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2203 		free(tmpdir);
2204 		tmpdir = bmake_strdup(_PATH_TMP);
2205 	}
2206 	return tmpdir;
2207 }
2208 
2209 /*
2210  * Create and open a temp file using "pattern".
2211  * If tfile is provided, set it to a copy of the filename created.
2212  * Otherwise unlink the file once open.
2213  */
2214 int
mkTempFile(const char * pattern,char * tfile,size_t tfile_sz)2215 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz)
2216 {
2217 	static char *tmpdir = NULL;
2218 	char tbuf[MAXPATHLEN];
2219 	int fd;
2220 
2221 	if (pattern == NULL)
2222 		pattern = TMPPAT;
2223 	if (tmpdir == NULL)
2224 		tmpdir = getTmpdir();
2225 	if (tfile == NULL) {
2226 		tfile = tbuf;
2227 		tfile_sz = sizeof tbuf;
2228 	}
2229 
2230 	if (pattern[0] == '/')
2231 		snprintf(tfile, tfile_sz, "%s", pattern);
2232 	else
2233 		snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern);
2234 
2235 	if ((fd = mkstemp(tfile)) < 0)
2236 		Punt("Could not create temporary file %s: %s", tfile,
2237 		    strerror(errno));
2238 	if (tfile == tbuf)
2239 		unlink(tfile);	/* we just want the descriptor */
2240 
2241 	return fd;
2242 }
2243 
2244 /*
2245  * Convert a string representation of a boolean into a boolean value.
2246  * Anything that looks like "No", "False", "Off", "0" etc. is false,
2247  * the empty string is the fallback, everything else is true.
2248  */
2249 bool
ParseBoolean(const char * s,bool fallback)2250 ParseBoolean(const char *s, bool fallback)
2251 {
2252 	char ch = ch_tolower(s[0]);
2253 	if (ch == '\0')
2254 		return fallback;
2255 	if (ch == '0' || ch == 'f' || ch == 'n')
2256 		return false;
2257 	if (ch == 'o')
2258 		return ch_tolower(s[1]) != 'f';
2259 	return true;
2260 }
2261