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