1 /* $NetBSD: main.c,v 1.638 2025/01/19 12:59:39 rillig 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 1.638 2025/01/19 12:59:39 rillig 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];
1418 const char *ep = getenv(MAKE_LEVEL_ENV);
1419
1420 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0;
1421 if (makelevel < 0)
1422 makelevel = 0;
1423 snprintf(buf, sizeof buf, "%d", makelevel);
1424 Global_Set(".MAKE.LEVEL", buf);
1425 snprintf(buf, sizeof buf, "%u", myPid);
1426 Global_Set_ReadOnly(".MAKE.PID", buf);
1427 snprintf(buf, sizeof buf, "%u", getppid());
1428 Global_Set_ReadOnly(".MAKE.PPID", buf);
1429 snprintf(buf, sizeof buf, "%u", getuid());
1430 Global_Set_ReadOnly(".MAKE.UID", buf);
1431 snprintf(buf, sizeof buf, "%u", getgid());
1432 Global_Set_ReadOnly(".MAKE.GID", buf);
1433 }
1434 if (makelevel > 0) {
1435 char pn[1024];
1436 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel);
1437 progname = bmake_strdup(pn);
1438 }
1439
1440 #ifdef USE_META
1441 meta_init();
1442 #endif
1443 Dir_Init();
1444
1445 {
1446 char *makeflags = explode(getenv("MAKEFLAGS"));
1447 Main_ParseArgLine(makeflags);
1448 free(makeflags);
1449 }
1450
1451 if (getcwd(curdir, MAXPATHLEN) == NULL) {
1452 (void)fprintf(stderr, "%s: getcwd: %s.\n",
1453 progname, strerror(errno));
1454 exit(2);
1455 }
1456
1457 MainParseArgs(argc, argv);
1458
1459 if (opts.enterFlag)
1460 printf("%s: Entering directory `%s'\n", progname, curdir);
1461
1462 if (stat(curdir, &sa) == -1) {
1463 (void)fprintf(stderr, "%s: %s: %s.\n",
1464 progname, curdir, strerror(errno));
1465 exit(2);
1466 }
1467
1468 #ifndef NO_PWD_OVERRIDE
1469 HandlePWD(&sa);
1470 #endif
1471 Global_Set(".CURDIR", curdir);
1472
1473 InitObjdir(machine, machine_arch);
1474
1475 Arch_Init();
1476 Suff_Init();
1477 Trace_Init(tracefile);
1478
1479 defaultNode = NULL;
1480 (void)time(&now);
1481
1482 Trace_Log(MAKESTART, NULL);
1483
1484 InitVarTargets();
1485
1486 InitDefSysIncPath(syspath);
1487 }
1488
1489 /*
1490 * Read the system makefile followed by either makefile, Makefile or the
1491 * files given by the -f option. Exit on parse errors.
1492 */
1493 static void
main_ReadFiles(void)1494 main_ReadFiles(void)
1495 {
1496
1497 if (Lst_IsEmpty(&sysIncPath->dirs))
1498 SearchPath_AddAll(sysIncPath, defSysIncPath);
1499
1500 Dir_SetSYSPATH();
1501 if (!opts.noBuiltins)
1502 ReadBuiltinRules();
1503
1504 posix_state = PS_MAYBE_NEXT_LINE;
1505 if (!Lst_IsEmpty(&opts.makefiles))
1506 ReadAllMakefiles(&opts.makefiles);
1507 else
1508 ReadFirstDefaultMakefile();
1509 }
1510
1511 /* Compute the dependency graph. */
1512 static void
main_PrepareMaking(void)1513 main_PrepareMaking(void)
1514 {
1515 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1516 if (!opts.noBuiltins || opts.printVars == PVM_NONE) {
1517 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}",
1518 SCOPE_CMDLINE, VARE_EVAL);
1519 if (makeDependfile[0] != '\0') {
1520 /* TODO: handle errors */
1521 doing_depend = true;
1522 (void)ReadMakefile(makeDependfile);
1523 doing_depend = false;
1524 }
1525 }
1526
1527 if (enterFlagObj)
1528 printf("%s: Entering directory `%s'\n", progname, objdir);
1529
1530 MakeMode();
1531
1532 {
1533 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS);
1534 Global_Append("MFLAGS", makeflags.str);
1535 FStr_Done(&makeflags);
1536 }
1537
1538 InitMaxJobs();
1539
1540 if (!opts.compatMake && !forceJobs)
1541 opts.compatMake = true;
1542
1543 if (!opts.compatMake)
1544 Job_ServerStart(maxJobTokens, jp_0, jp_1);
1545 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1546 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0);
1547
1548 if (opts.printVars == PVM_NONE)
1549 Main_ExportMAKEFLAGS(true); /* initial export */
1550
1551 InitVpath();
1552
1553 /*
1554 * Now that all search paths have been read for suffixes et al, it's
1555 * time to add the default search path to their lists...
1556 */
1557 Suff_ExtendPaths();
1558
1559 /*
1560 * Propagate attributes through :: dependency lists.
1561 */
1562 Targ_Propagate();
1563
1564 /* print the initial graph, if the user requested it */
1565 if (DEBUG(GRAPH1))
1566 Targ_PrintGraph(1);
1567 }
1568
1569 /*
1570 * Make the targets.
1571 * If the -v or -V options are given, print variables instead.
1572 * Return whether any of the targets is out-of-date.
1573 */
1574 static bool
main_Run(void)1575 main_Run(void)
1576 {
1577 if (opts.printVars != PVM_NONE) {
1578 /* print the values of any variables requested by the user */
1579 doPrintVars();
1580 return false;
1581 } else {
1582 return runTargets();
1583 }
1584 }
1585
1586 /* Clean up after making the targets. */
1587 static void
main_CleanUp(void)1588 main_CleanUp(void)
1589 {
1590 #ifdef CLEANUP
1591 Lst_DoneFree(&opts.variables);
1592 Lst_DoneFree(&opts.makefiles);
1593 Lst_DoneFree(&opts.create);
1594 #endif
1595
1596 if (DEBUG(GRAPH2))
1597 Targ_PrintGraph(2);
1598
1599 Trace_Log(MAKEEND, NULL);
1600
1601 if (enterFlagObj)
1602 printf("%s: Leaving directory `%s'\n", progname, objdir);
1603 if (opts.enterFlag)
1604 printf("%s: Leaving directory `%s'\n", progname, curdir);
1605
1606 Var_Stats();
1607 Targ_Stats();
1608
1609 #ifdef USE_META
1610 meta_finish();
1611 #endif
1612 #ifdef CLEANUP
1613 Suff_End();
1614 Targ_End();
1615 Arch_End();
1616 Parse_End();
1617 Dir_End();
1618 Job_End();
1619 #endif
1620 Trace_End();
1621 #ifdef CLEANUP
1622 Str_Intern_End();
1623 #endif
1624 }
1625
1626 /* Determine the exit code. */
1627 static int
main_Exit(bool outOfDate)1628 main_Exit(bool outOfDate)
1629 {
1630 if ((opts.strict && main_errors > 0) || parseErrors > 0)
1631 return 2; /* Not 1 so -q can distinguish error */
1632 return outOfDate ? 1 : 0;
1633 }
1634
1635 int
main(int argc,char ** argv)1636 main(int argc, char **argv)
1637 {
1638 bool outOfDate;
1639
1640 main_Init(argc, argv);
1641 main_ReadFiles();
1642 main_PrepareMaking();
1643 outOfDate = main_Run();
1644 main_CleanUp();
1645 return main_Exit(outOfDate);
1646 }
1647
1648 /*
1649 * Open and parse the given makefile, with all its side effects.
1650 * Return false if the file could not be opened.
1651 */
1652 static bool
ReadMakefile(const char * fname)1653 ReadMakefile(const char *fname)
1654 {
1655 int fd;
1656 char *name, *path = NULL;
1657
1658 if (strcmp(fname, "-") == 0) {
1659 Parse_File("(stdin)", -1);
1660 Var_Set(SCOPE_INTERNAL, "MAKEFILE", "");
1661 } else {
1662 if (strncmp(fname, ".../", 4) == 0) {
1663 name = Dir_FindHereOrAbove(curdir, fname + 4);
1664 if (name != NULL) {
1665 /* Dir_FindHereOrAbove returns dirname */
1666 path = str_concat3(name, "/",
1667 str_basename(fname));
1668 free(name);
1669 fd = open(path, O_RDONLY);
1670 if (fd != -1) {
1671 fname = path;
1672 goto found;
1673 }
1674 }
1675 }
1676 /* if we've chdir'd, rebuild the path name */
1677 if (strcmp(curdir, objdir) != 0 && *fname != '/') {
1678 path = str_concat3(curdir, "/", fname);
1679 fd = open(path, O_RDONLY);
1680 if (fd != -1) {
1681 fname = path;
1682 goto found;
1683 }
1684 free(path);
1685
1686 /* If curdir failed, try objdir (ala .depend) */
1687 path = str_concat3(objdir, "/", fname);
1688 fd = open(path, O_RDONLY);
1689 if (fd != -1) {
1690 fname = path;
1691 goto found;
1692 }
1693 } else {
1694 fd = open(fname, O_RDONLY);
1695 if (fd != -1)
1696 goto found;
1697 }
1698 /* look in -I and system include directories. */
1699 name = Dir_FindFile(fname, parseIncPath);
1700 if (name == NULL) {
1701 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs)
1702 ? defSysIncPath : sysIncPath;
1703 name = Dir_FindFile(fname, sysInc);
1704 }
1705 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) {
1706 free(name);
1707 free(path);
1708 return false;
1709 }
1710 fname = name;
1711 /*
1712 * set the MAKEFILE variable desired by System V fans -- the
1713 * placement of the setting here means it gets set to the last
1714 * makefile specified, as it is set by SysV make.
1715 */
1716 found:
1717 if (!doing_depend)
1718 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname);
1719 Parse_File(fname, fd);
1720 }
1721 free(path);
1722 return true;
1723 }
1724
1725 /* populate av for Cmd_Exec and Compat_RunCommand */
1726 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)1727 Cmd_Argv(const char *cmd, size_t cmd_len, const char **av, size_t avsz,
1728 char *cmd_file, size_t cmd_filesz, bool eflag, bool xflag)
1729 {
1730 int ac = 0;
1731 int cmd_fd = -1;
1732
1733 if (shellPath == NULL)
1734 Shell_Init();
1735
1736 if (cmd_file != NULL) {
1737 if (cmd_len == 0)
1738 cmd_len = strlen(cmd);
1739
1740 if (cmd_len > MAKE_CMDLEN_LIMIT) {
1741 cmd_fd = mkTempFile(NULL, cmd_file, cmd_filesz);
1742 if (cmd_fd >= 0) {
1743 ssize_t n;
1744
1745 n = write(cmd_fd, cmd, cmd_len);
1746 close(cmd_fd);
1747 if (n < (ssize_t)cmd_len) {
1748 unlink(cmd_file);
1749 cmd_fd = -1;
1750 }
1751 }
1752 } else
1753 cmd_file[0] = '\0';
1754 }
1755
1756 if (avsz < 4 || (eflag && avsz < 5))
1757 return -1;
1758
1759 /* The following works for any of the builtin shell specs. */
1760 av[ac++] = shellPath;
1761 if (eflag)
1762 av[ac++] = shellErrFlag;
1763 if (cmd_fd >= 0) {
1764 if (xflag)
1765 av[ac++] = "-x";
1766 av[ac++] = cmd_file;
1767 } else {
1768 av[ac++] = xflag ? "-xc" : "-c";
1769 av[ac++] = cmd;
1770 }
1771 av[ac] = NULL;
1772 return ac;
1773 }
1774
1775 /*
1776 * Execute the command in cmd, and return its output (only stdout, not
1777 * stderr, possibly empty). In the output, replace newlines with spaces.
1778 */
1779 char *
Cmd_Exec(const char * cmd,char ** error)1780 Cmd_Exec(const char *cmd, char **error)
1781 {
1782 const char *args[4]; /* Arguments for invoking the shell */
1783 int pipefds[2];
1784 int cpid; /* Child PID */
1785 int pid; /* PID from wait() */
1786 int status; /* command exit status */
1787 Buffer buf; /* buffer to store the result */
1788 ssize_t bytes_read;
1789 char *output;
1790 char *p;
1791 int saved_errno;
1792 char cmd_file[MAXPATHLEN];
1793
1794 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd);
1795
1796 if (Cmd_Argv(cmd, 0, args, 4, cmd_file, sizeof(cmd_file), false, false) < 0
1797 || pipe(pipefds) == -1) {
1798 *error = str_concat3(
1799 "Couldn't create pipe for \"", cmd, "\"");
1800 return bmake_strdup("");
1801 }
1802
1803 Var_ReexportVars(SCOPE_GLOBAL);
1804
1805 switch (cpid = FORK_FUNCTION()) {
1806 case 0:
1807 (void)close(pipefds[0]);
1808 (void)dup2(pipefds[1], STDOUT_FILENO);
1809 (void)close(pipefds[1]);
1810
1811 (void)execv(shellPath, UNCONST(args));
1812 _exit(1);
1813 /* NOTREACHED */
1814
1815 case -1:
1816 *error = str_concat3("Couldn't exec \"", cmd, "\"");
1817 return bmake_strdup("");
1818 }
1819
1820 (void)close(pipefds[1]); /* No need for the writing half */
1821
1822 saved_errno = 0;
1823 Buf_Init(&buf);
1824
1825 do {
1826 char result[BUFSIZ];
1827 bytes_read = read(pipefds[0], result, sizeof result);
1828 if (bytes_read > 0)
1829 Buf_AddBytes(&buf, result, (size_t)bytes_read);
1830 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR));
1831 if (bytes_read == -1)
1832 saved_errno = errno;
1833
1834 (void)close(pipefds[0]); /* Close the input side of the pipe. */
1835
1836 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0)
1837 JobReapChild(pid, status, false);
1838
1839 if (Buf_EndsWith(&buf, '\n'))
1840 buf.data[buf.len - 1] = '\0';
1841
1842 output = Buf_DoneData(&buf);
1843 for (p = output; *p != '\0'; p++)
1844 if (*p == '\n')
1845 *p = ' ';
1846
1847 if (WIFSIGNALED(status))
1848 *error = str_concat3("\"", cmd, "\" exited on a signal");
1849 else if (WEXITSTATUS(status) != 0) {
1850 Buffer errBuf;
1851 Buf_Init(&errBuf);
1852 Buf_AddStr(&errBuf, "Command \"");
1853 Buf_AddStr(&errBuf, cmd);
1854 Buf_AddStr(&errBuf, "\" exited with status ");
1855 Buf_AddInt(&errBuf, WEXITSTATUS(status));
1856 *error = Buf_DoneData(&errBuf);
1857 } else if (saved_errno != 0)
1858 *error = str_concat3(
1859 "Couldn't read shell's output for \"", cmd, "\"");
1860 else
1861 *error = NULL;
1862 if (cmd_file[0] != '\0')
1863 unlink(cmd_file);
1864 return output;
1865 }
1866
1867 /*
1868 * Print a printf-style error message.
1869 *
1870 * In default mode, this error message has no consequences, for compatibility
1871 * reasons, in particular it does not affect the exit status. Only in lint
1872 * mode (-dL) it does.
1873 */
1874 void
Error(const char * fmt,...)1875 Error(const char *fmt, ...)
1876 {
1877 va_list ap;
1878 FILE *f;
1879
1880 f = opts.debug_file;
1881 if (f == stdout)
1882 f = stderr;
1883 (void)fflush(stdout);
1884
1885 for (;;) {
1886 fprintf(f, "%s: ", progname);
1887 va_start(ap, fmt);
1888 (void)vfprintf(f, fmt, ap);
1889 va_end(ap);
1890 (void)fprintf(f, "\n");
1891 (void)fflush(f);
1892 if (f == stderr)
1893 break;
1894 f = stderr;
1895 }
1896 main_errors++;
1897 }
1898
1899 /*
1900 * Wait for any running jobs to finish, then produce an error message,
1901 * finally exit immediately.
1902 *
1903 * Exiting immediately differs from Parse_Error, which exits only after the
1904 * current top-level makefile has been parsed completely.
1905 */
1906 void
Fatal(const char * fmt,...)1907 Fatal(const char *fmt, ...)
1908 {
1909 va_list ap;
1910
1911 if (jobsRunning)
1912 Job_Wait();
1913
1914 (void)fflush(stdout);
1915 fprintf(stderr, "%s: ", progname);
1916 va_start(ap, fmt);
1917 (void)vfprintf(stderr, fmt, ap);
1918 va_end(ap);
1919 (void)fprintf(stderr, "\n");
1920 (void)fflush(stderr);
1921 PrintStackTrace(true);
1922
1923 PrintOnError(NULL, "\n");
1924
1925 if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1926 Targ_PrintGraph(2);
1927 Trace_Log(MAKEERROR, NULL);
1928 exit(2); /* Not 1 so -q can distinguish error */
1929 }
1930
1931 /*
1932 * Major exception once jobs are being created.
1933 * Kills all jobs, prints a message and exits.
1934 */
1935 void
Punt(const char * fmt,...)1936 Punt(const char *fmt, ...)
1937 {
1938 va_list ap;
1939
1940 (void)fflush(stdout);
1941 (void)fprintf(stderr, "%s: ", progname);
1942 va_start(ap, fmt);
1943 (void)vfprintf(stderr, fmt, ap);
1944 va_end(ap);
1945 (void)fprintf(stderr, "\n");
1946 (void)fflush(stderr);
1947
1948 PrintOnError(NULL, "\n");
1949
1950 DieHorribly();
1951 }
1952
1953 /* Exit without giving a message. */
1954 void
DieHorribly(void)1955 DieHorribly(void)
1956 {
1957 if (jobsRunning)
1958 Job_AbortAll();
1959 if (DEBUG(GRAPH2))
1960 Targ_PrintGraph(2);
1961 Trace_Log(MAKEERROR, NULL);
1962 exit(2); /* Not 1 so -q can distinguish error */
1963 }
1964
1965 /*
1966 * Called when aborting due to errors in child shell to signal abnormal exit.
1967 * The program exits.
1968 * Errors is the number of errors encountered in Make_Make.
1969 */
1970 void
Finish(int errs)1971 Finish(int errs)
1972 {
1973 if (shouldDieQuietly(NULL, -1))
1974 exit(2);
1975 Fatal("%d error%s", errs, errs == 1 ? "" : "s");
1976 }
1977
1978 int
unlink_file(const char * file)1979 unlink_file(const char *file)
1980 {
1981 struct stat st;
1982
1983 if (lstat(file, &st) == -1)
1984 return -1;
1985
1986 if (S_ISDIR(st.st_mode)) {
1987 /*
1988 * POSIX says for unlink: "The path argument shall not name
1989 * a directory unless [...]".
1990 */
1991 errno = EISDIR;
1992 return -1;
1993 }
1994 return unlink(file);
1995 }
1996
1997 static void
write_all(int fd,const void * data,size_t n)1998 write_all(int fd, const void *data, size_t n)
1999 {
2000 const char *mem = data;
2001
2002 while (n > 0) {
2003 ssize_t written = write(fd, mem, n);
2004 /* XXX: Should this EAGAIN be EINTR? */
2005 if (written == -1 && errno == EAGAIN)
2006 continue;
2007 if (written == -1)
2008 break;
2009 mem += written;
2010 n -= (size_t)written;
2011 }
2012 }
2013
2014 /* Print why exec failed, avoiding stdio. */
2015 void MAKE_ATTR_DEAD
execDie(const char * func,const char * arg)2016 execDie(const char *func, const char *arg)
2017 {
2018 char msg[1024];
2019 int len;
2020
2021 len = snprintf(msg, sizeof(msg), "%s: %s(%s) failed (%s)\n",
2022 progname, func, arg, strerror(errno));
2023 write_all(STDERR_FILENO, msg, (size_t)len);
2024 _exit(1);
2025 }
2026
2027 static void
purge_relative_cached_realpaths(void)2028 purge_relative_cached_realpaths(void)
2029 {
2030 HashIter hi;
2031 bool more;
2032
2033 HashIter_Init(&hi, &cached_realpaths);
2034 more = HashIter_Next(&hi);
2035 while (more) {
2036 HashEntry *he = hi.entry;
2037 more = HashIter_Next(&hi);
2038 if (he->key[0] != '/') {
2039 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key);
2040 free(he->value);
2041 HashTable_DeleteEntry(&cached_realpaths, he);
2042 }
2043 }
2044 }
2045
2046 const char *
cached_realpath(const char * pathname,char * resolved)2047 cached_realpath(const char *pathname, char *resolved)
2048 {
2049 const char *rp;
2050
2051 if (pathname == NULL || pathname[0] == '\0')
2052 return NULL;
2053
2054 rp = HashTable_FindValue(&cached_realpaths, pathname);
2055 if (rp != NULL) {
2056 snprintf(resolved, MAXPATHLEN, "%s", rp);
2057 return resolved;
2058 }
2059
2060 rp = realpath(pathname, resolved);
2061 if (rp != NULL) {
2062 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp));
2063 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp);
2064 return resolved;
2065 }
2066
2067 /* should we negative-cache? */
2068 return NULL;
2069 }
2070
2071 /*
2072 * Return true if we should die without noise.
2073 * For example our failing child was a sub-make or failure happened elsewhere.
2074 */
2075 bool
shouldDieQuietly(GNode * gn,int bf)2076 shouldDieQuietly(GNode *gn, int bf)
2077 {
2078 static int quietly = -1;
2079
2080 if (quietly < 0) {
2081 if (DEBUG(JOB) ||
2082 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true))
2083 quietly = 0;
2084 else if (bf >= 0)
2085 quietly = bf;
2086 else
2087 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0;
2088 }
2089 return quietly != 0;
2090 }
2091
2092 static void
SetErrorVars(GNode * gn)2093 SetErrorVars(GNode *gn)
2094 {
2095 StringListNode *ln;
2096 char sts[16];
2097
2098 /*
2099 * We can print this even if there is no .ERROR target.
2100 */
2101 snprintf(sts, sizeof(sts), "%d", gn->exit_status);
2102 Global_Set(".ERROR_EXIT", sts);
2103 Global_Set(".ERROR_TARGET", gn->name);
2104 Global_Delete(".ERROR_CMD");
2105
2106 for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
2107 const char *cmd = ln->datum;
2108
2109 if (cmd == NULL)
2110 break;
2111 Global_Append(".ERROR_CMD", cmd);
2112 }
2113 }
2114
2115 /*
2116 * Print some helpful information in case of an error.
2117 * The caller should exit soon after calling this function.
2118 */
2119 void
PrintOnError(GNode * gn,const char * msg)2120 PrintOnError(GNode *gn, const char *msg)
2121 {
2122 static GNode *errorNode = NULL;
2123 StringListNode *ln;
2124
2125 if (DEBUG(HASH)) {
2126 Targ_Stats();
2127 Var_Stats();
2128 }
2129
2130 if (errorNode != NULL)
2131 return; /* we've been here! */
2132
2133 printf("%s%s: stopped", msg, progname);
2134 ln = opts.create.first;
2135 if (ln != NULL || mainNode != NULL) {
2136 printf(" making \"");
2137 if (ln != NULL) {
2138 printf("%s", (const char *)ln->datum);
2139 for (ln = ln->next; ln != NULL; ln = ln->next)
2140 printf(" %s", (const char *)ln->datum);
2141 } else
2142 printf("%s", mainNode->name);
2143 printf("\"");
2144 }
2145 printf(" in %s\n", curdir);
2146
2147 /* we generally want to keep quiet if a sub-make died */
2148 if (shouldDieQuietly(gn, -1))
2149 return;
2150
2151 if (gn != NULL)
2152 SetErrorVars(gn);
2153
2154 {
2155 char *errorVarsValues = Var_Subst(
2156 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
2157 SCOPE_GLOBAL, VARE_EVAL);
2158 /* TODO: handle errors */
2159 printf("%s", errorVarsValues);
2160 free(errorVarsValues);
2161 }
2162
2163 fflush(stdout);
2164
2165 /*
2166 * Finally, see if there is a .ERROR target, and run it if so.
2167 */
2168 errorNode = Targ_FindNode(".ERROR");
2169 if (errorNode != NULL) {
2170 errorNode->type |= OP_SPECIAL;
2171 Compat_Make(errorNode, errorNode);
2172 }
2173 }
2174
2175 void
Main_ExportMAKEFLAGS(bool first)2176 Main_ExportMAKEFLAGS(bool first)
2177 {
2178 static bool once = true;
2179 char *flags;
2180
2181 if (once != first)
2182 return;
2183 once = false;
2184
2185 flags = Var_Subst(
2186 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
2187 SCOPE_CMDLINE, VARE_EVAL);
2188 /* TODO: handle errors */
2189 if (flags[0] != '\0')
2190 setenv("MAKEFLAGS", flags, 1);
2191 free(flags);
2192 }
2193
2194 char *
getTmpdir(void)2195 getTmpdir(void)
2196 {
2197 static char *tmpdir = NULL;
2198 struct stat st;
2199
2200 if (tmpdir != NULL)
2201 return tmpdir;
2202
2203 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */
2204 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/",
2205 SCOPE_GLOBAL, VARE_EVAL);
2206 /* TODO: handle errors */
2207
2208 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2209 free(tmpdir);
2210 tmpdir = bmake_strdup(_PATH_TMP);
2211 }
2212 return tmpdir;
2213 }
2214
2215 /*
2216 * Create and open a temp file using "pattern".
2217 * If tfile is provided, set it to a copy of the filename created.
2218 * Otherwise unlink the file once open.
2219 */
2220 int
mkTempFile(const char * pattern,char * tfile,size_t tfile_sz)2221 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz)
2222 {
2223 static char *tmpdir = NULL;
2224 char tbuf[MAXPATHLEN];
2225 int fd;
2226
2227 if (pattern == NULL)
2228 pattern = TMPPAT;
2229 if (tmpdir == NULL)
2230 tmpdir = getTmpdir();
2231 if (tfile == NULL) {
2232 tfile = tbuf;
2233 tfile_sz = sizeof tbuf;
2234 }
2235
2236 if (pattern[0] == '/')
2237 snprintf(tfile, tfile_sz, "%s", pattern);
2238 else
2239 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern);
2240
2241 if ((fd = mkstemp(tfile)) < 0)
2242 Punt("Could not create temporary file %s: %s", tfile,
2243 strerror(errno));
2244 if (tfile == tbuf)
2245 unlink(tfile); /* we just want the descriptor */
2246
2247 return fd;
2248 }
2249
2250 /*
2251 * Convert a string representation of a boolean into a boolean value.
2252 * Anything that looks like "No", "False", "Off", "0" etc. is false,
2253 * the empty string is the fallback, everything else is true.
2254 */
2255 bool
ParseBoolean(const char * s,bool fallback)2256 ParseBoolean(const char *s, bool fallback)
2257 {
2258 char ch = ch_tolower(s[0]);
2259 if (ch == '\0')
2260 return fallback;
2261 if (ch == '0' || ch == 'f' || ch == 'n')
2262 return false;
2263 if (ch == 'o')
2264 return ch_tolower(s[1]) != 'f';
2265 return true;
2266 }
2267