1 /* $NetBSD: main.c,v 1.539 2021/04/19 16:35:11 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 1.539 2021/04/19 16:35:11 rillig Exp $");
115 #if defined(MAKE_NATIVE) && !defined(lint)
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 line by itself */
129 bool deleteOnError; /* .DELETE_ON_ERROR: set */
130
131 static int maxJobTokens; /* -j argument */
132 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 int 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 size_t len;
161 char *nf, *st;
162 const char *f;
163
164 if (flags == NULL)
165 return NULL;
166
167 for (f = flags; *f != '\0'; f++)
168 if (!ch_isalpha(*f))
169 break;
170
171 if (*f != '\0')
172 return bmake_strdup(flags);
173
174 len = strlen(flags);
175 st = nf = bmake_malloc(len * 3 + 1);
176 while (*flags != '\0') {
177 *nf++ = '-';
178 *nf++ = *flags++;
179 *nf++ = ' ';
180 }
181 *nf = '\0';
182 return st;
183 }
184
185 /*
186 * usage --
187 * exit with usage message
188 */
189 MAKE_ATTR_DEAD static void
usage(void)190 usage(void)
191 {
192 size_t prognameLen = strcspn(progname, "[");
193
194 (void)fprintf(stderr,
195 "usage: %.*s [-BeikNnqrSstWwX]\n"
196 " [-C directory] [-D variable] [-d flags] [-f makefile]\n"
197 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n"
198 " [-V variable] [-v variable] [variable=value] [target ...]\n",
199 (int)prognameLen, progname);
200 exit(2);
201 }
202
203 static void
MainParseArgDebugFile(const char * arg)204 MainParseArgDebugFile(const char *arg)
205 {
206 const char *mode;
207 size_t len;
208 char *fname;
209
210 if (opts.debug_file != stdout && opts.debug_file != stderr)
211 fclose(opts.debug_file);
212
213 if (*arg == '+') {
214 arg++;
215 mode = "a";
216 } else
217 mode = "w";
218
219 if (strcmp(arg, "stdout") == 0) {
220 opts.debug_file = stdout;
221 return;
222 }
223 if (strcmp(arg, "stderr") == 0) {
224 opts.debug_file = stderr;
225 return;
226 }
227
228 len = strlen(arg);
229 fname = bmake_malloc(len + 20);
230 memcpy(fname, arg, len + 1);
231
232 /* Let the filename be modified by the pid */
233 if (strcmp(fname + len - 3, ".%d") == 0)
234 snprintf(fname + len - 2, 20, "%d", getpid());
235
236 opts.debug_file = fopen(fname, mode);
237 if (opts.debug_file == NULL) {
238 fprintf(stderr, "Cannot open debug file %s\n",
239 fname);
240 usage();
241 }
242 free(fname);
243 }
244
245 static void
MainParseArgDebug(const char * argvalue)246 MainParseArgDebug(const char *argvalue)
247 {
248 const char *modules;
249 DebugFlags debug = opts.debug;
250
251 for (modules = argvalue; *modules != '\0'; modules++) {
252 switch (*modules) {
253 case '0': /* undocumented, only intended for tests */
254 debug = DEBUG_NONE;
255 break;
256 case 'A':
257 debug = DEBUG_ALL;
258 break;
259 case 'a':
260 debug |= DEBUG_ARCH;
261 break;
262 case 'C':
263 debug |= DEBUG_CWD;
264 break;
265 case 'c':
266 debug |= DEBUG_COND;
267 break;
268 case 'd':
269 debug |= DEBUG_DIR;
270 break;
271 case 'e':
272 debug |= DEBUG_ERROR;
273 break;
274 case 'f':
275 debug |= DEBUG_FOR;
276 break;
277 case 'g':
278 if (modules[1] == '1') {
279 debug |= DEBUG_GRAPH1;
280 modules++;
281 } else if (modules[1] == '2') {
282 debug |= DEBUG_GRAPH2;
283 modules++;
284 } else if (modules[1] == '3') {
285 debug |= DEBUG_GRAPH3;
286 modules++;
287 }
288 break;
289 case 'h':
290 debug |= DEBUG_HASH;
291 break;
292 case 'j':
293 debug |= DEBUG_JOB;
294 break;
295 case 'L':
296 opts.strict = true;
297 break;
298 case 'l':
299 debug |= DEBUG_LOUD;
300 break;
301 case 'M':
302 debug |= DEBUG_META;
303 break;
304 case 'm':
305 debug |= DEBUG_MAKE;
306 break;
307 case 'n':
308 debug |= DEBUG_SCRIPT;
309 break;
310 case 'p':
311 debug |= DEBUG_PARSE;
312 break;
313 case 's':
314 debug |= DEBUG_SUFF;
315 break;
316 case 't':
317 debug |= DEBUG_TARG;
318 break;
319 case 'V':
320 opts.debugVflag = true;
321 break;
322 case 'v':
323 debug |= DEBUG_VAR;
324 break;
325 case 'x':
326 debug |= DEBUG_SHELL;
327 break;
328 case 'F':
329 MainParseArgDebugFile(modules + 1);
330 goto debug_setbuf;
331 default:
332 (void)fprintf(stderr,
333 "%s: illegal argument to d option -- %c\n",
334 progname, *modules);
335 usage();
336 }
337 }
338
339 debug_setbuf:
340 opts.debug = debug;
341
342 /*
343 * Make the debug_file unbuffered, and make
344 * stdout line buffered (unless debugfile == stdout).
345 */
346 setvbuf(opts.debug_file, NULL, _IONBF, 0);
347 if (opts.debug_file != stdout) {
348 setvbuf(stdout, NULL, _IOLBF, 0);
349 }
350 }
351
352 /* Is path relative, or does it contain any relative component "." or ".."? */
353 static bool
IsRelativePath(const char * path)354 IsRelativePath(const char *path)
355 {
356 const char *cp;
357
358 if (path[0] != '/')
359 return true;
360 cp = path;
361 while ((cp = strstr(cp, "/.")) != NULL) {
362 cp += 2;
363 if (*cp == '.')
364 cp++;
365 if (cp[0] == '/' || cp[0] == '\0')
366 return true;
367 }
368 return false;
369 }
370
371 static void
MainParseArgChdir(const char * argvalue)372 MainParseArgChdir(const char *argvalue)
373 {
374 struct stat sa, sb;
375
376 if (chdir(argvalue) == -1) {
377 (void)fprintf(stderr, "%s: chdir %s: %s\n",
378 progname, argvalue, strerror(errno));
379 exit(2); /* Not 1 so -q can distinguish error */
380 }
381 if (getcwd(curdir, MAXPATHLEN) == NULL) {
382 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
383 exit(2);
384 }
385 if (!IsRelativePath(argvalue) &&
386 stat(argvalue, &sa) != -1 &&
387 stat(curdir, &sb) != -1 &&
388 sa.st_ino == sb.st_ino &&
389 sa.st_dev == sb.st_dev)
390 strncpy(curdir, argvalue, MAXPATHLEN);
391 ignorePWD = true;
392 }
393
394 static void
MainParseArgJobsInternal(const char * argvalue)395 MainParseArgJobsInternal(const char *argvalue)
396 {
397 char end;
398 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) {
399 (void)fprintf(stderr,
400 "%s: internal error -- J option malformed (%s)\n",
401 progname, argvalue);
402 usage();
403 }
404 if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
405 (fcntl(jp_1, F_GETFD, 0) < 0)) {
406 #if 0
407 (void)fprintf(stderr,
408 "%s: ###### warning -- J descriptors were closed!\n",
409 progname);
410 exit(2);
411 #endif
412 jp_0 = -1;
413 jp_1 = -1;
414 opts.compatMake = true;
415 } else {
416 Global_Append(MAKEFLAGS, "-J");
417 Global_Append(MAKEFLAGS, argvalue);
418 }
419 }
420
421 static void
MainParseArgJobs(const char * argvalue)422 MainParseArgJobs(const char *argvalue)
423 {
424 char *p;
425
426 forceJobs = true;
427 opts.maxJobs = (int)strtol(argvalue, &p, 0);
428 if (*p != '\0' || opts.maxJobs < 1) {
429 (void)fprintf(stderr,
430 "%s: illegal argument to -j -- must be positive integer!\n",
431 progname);
432 exit(2); /* Not 1 so -q can distinguish error */
433 }
434 Global_Append(MAKEFLAGS, "-j");
435 Global_Append(MAKEFLAGS, argvalue);
436 Global_Set(".MAKE.JOBS", argvalue);
437 maxJobTokens = opts.maxJobs;
438 }
439
440 static void
MainParseArgSysInc(const char * argvalue)441 MainParseArgSysInc(const char *argvalue)
442 {
443 /* look for magic parent directory search string */
444 if (strncmp(".../", argvalue, 4) == 0) {
445 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4);
446 if (found_path == NULL)
447 return;
448 (void)SearchPath_Add(sysIncPath, found_path);
449 free(found_path);
450 } else {
451 (void)SearchPath_Add(sysIncPath, argvalue);
452 }
453 Global_Append(MAKEFLAGS, "-m");
454 Global_Append(MAKEFLAGS, argvalue);
455 }
456
457 static bool
MainParseArg(char c,const char * argvalue)458 MainParseArg(char c, const char *argvalue)
459 {
460 switch (c) {
461 case '\0':
462 break;
463 case 'B':
464 opts.compatMake = true;
465 Global_Append(MAKEFLAGS, "-B");
466 Global_Set(MAKE_MODE, "compat");
467 break;
468 case 'C':
469 MainParseArgChdir(argvalue);
470 break;
471 case 'D':
472 if (argvalue[0] == '\0') return false;
473 Global_SetExpand(argvalue, "1");
474 Global_Append(MAKEFLAGS, "-D");
475 Global_Append(MAKEFLAGS, argvalue);
476 break;
477 case 'I':
478 Parse_AddIncludeDir(argvalue);
479 Global_Append(MAKEFLAGS, "-I");
480 Global_Append(MAKEFLAGS, argvalue);
481 break;
482 case 'J':
483 MainParseArgJobsInternal(argvalue);
484 break;
485 case 'N':
486 opts.noExecute = true;
487 opts.noRecursiveExecute = true;
488 Global_Append(MAKEFLAGS, "-N");
489 break;
490 case 'S':
491 opts.keepgoing = false;
492 Global_Append(MAKEFLAGS, "-S");
493 break;
494 case 'T':
495 tracefile = bmake_strdup(argvalue);
496 Global_Append(MAKEFLAGS, "-T");
497 Global_Append(MAKEFLAGS, argvalue);
498 break;
499 case 'V':
500 case 'v':
501 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED;
502 Lst_Append(&opts.variables, bmake_strdup(argvalue));
503 /* XXX: Why always -V? */
504 Global_Append(MAKEFLAGS, "-V");
505 Global_Append(MAKEFLAGS, argvalue);
506 break;
507 case 'W':
508 opts.parseWarnFatal = true;
509 /* XXX: why no Var_Append? */
510 break;
511 case 'X':
512 opts.varNoExportEnv = true;
513 Global_Append(MAKEFLAGS, "-X");
514 break;
515 case 'd':
516 /* If '-d-opts' don't pass to children */
517 if (argvalue[0] == '-')
518 argvalue++;
519 else {
520 Global_Append(MAKEFLAGS, "-d");
521 Global_Append(MAKEFLAGS, argvalue);
522 }
523 MainParseArgDebug(argvalue);
524 break;
525 case 'e':
526 opts.checkEnvFirst = true;
527 Global_Append(MAKEFLAGS, "-e");
528 break;
529 case 'f':
530 Lst_Append(&opts.makefiles, bmake_strdup(argvalue));
531 break;
532 case 'i':
533 opts.ignoreErrors = true;
534 Global_Append(MAKEFLAGS, "-i");
535 break;
536 case 'j':
537 MainParseArgJobs(argvalue);
538 break;
539 case 'k':
540 opts.keepgoing = true;
541 Global_Append(MAKEFLAGS, "-k");
542 break;
543 case 'm':
544 MainParseArgSysInc(argvalue);
545 /* XXX: why no Var_Append? */
546 break;
547 case 'n':
548 opts.noExecute = true;
549 Global_Append(MAKEFLAGS, "-n");
550 break;
551 case 'q':
552 opts.queryFlag = true;
553 /* Kind of nonsensical, wot? */
554 Global_Append(MAKEFLAGS, "-q");
555 break;
556 case 'r':
557 opts.noBuiltins = true;
558 Global_Append(MAKEFLAGS, "-r");
559 break;
560 case 's':
561 opts.beSilent = true;
562 Global_Append(MAKEFLAGS, "-s");
563 break;
564 case 't':
565 opts.touchFlag = true;
566 Global_Append(MAKEFLAGS, "-t");
567 break;
568 case 'w':
569 opts.enterFlag = true;
570 Global_Append(MAKEFLAGS, "-w");
571 break;
572 default:
573 case '?':
574 usage();
575 }
576 return true;
577 }
578
579 /*
580 * Parse the given arguments. Called from main() and from
581 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
582 *
583 * The arguments must be treated as read-only and will be freed after the
584 * call.
585 *
586 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
587 */
588 static void
MainParseArgs(int argc,char ** argv)589 MainParseArgs(int argc, char **argv)
590 {
591 char c;
592 int arginc;
593 char *argvalue;
594 char *optscan;
595 bool inOption, dashDash = false;
596
597 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w";
598 /* Can't actually use getopt(3) because rescanning is not portable */
599
600 rearg:
601 inOption = false;
602 optscan = NULL;
603 while (argc > 1) {
604 const char *optspec;
605 if (!inOption)
606 optscan = argv[1];
607 c = *optscan++;
608 arginc = 0;
609 if (inOption) {
610 if (c == '\0') {
611 argv++;
612 argc--;
613 inOption = false;
614 continue;
615 }
616 } else {
617 if (c != '-' || dashDash)
618 break;
619 inOption = true;
620 c = *optscan++;
621 }
622 /* '-' found at some earlier point */
623 optspec = strchr(optspecs, c);
624 if (c != '\0' && optspec != NULL && optspec[1] == ':') {
625 /* -<something> found, and <something> should have an arg */
626 inOption = false;
627 arginc = 1;
628 argvalue = optscan;
629 if (*argvalue == '\0') {
630 if (argc < 3)
631 goto noarg;
632 argvalue = argv[2];
633 arginc = 2;
634 }
635 } else {
636 argvalue = NULL;
637 }
638 switch (c) {
639 case '\0':
640 arginc = 1;
641 inOption = false;
642 break;
643 case '-':
644 dashDash = true;
645 break;
646 default:
647 if (!MainParseArg(c, argvalue))
648 goto noarg;
649 }
650 argv += arginc;
651 argc -= arginc;
652 }
653
654 /*
655 * See if the rest of the arguments are variable assignments and
656 * perform them if so. Else take them to be targets and stuff them
657 * on the end of the "create" list.
658 */
659 for (; argc > 1; argv++, argc--) {
660 VarAssign var;
661 if (Parse_IsVar(argv[1], &var)) {
662 Parse_Var(&var, SCOPE_CMDLINE);
663 } else {
664 if (argv[1][0] == '\0')
665 Punt("illegal (null) argument.");
666 if (argv[1][0] == '-' && !dashDash)
667 goto rearg;
668 Lst_Append(&opts.create, bmake_strdup(argv[1]));
669 }
670 }
671
672 return;
673 noarg:
674 (void)fprintf(stderr, "%s: option requires an argument -- %c\n",
675 progname, c);
676 usage();
677 }
678
679 /*
680 * Break a line of arguments into words and parse them.
681 *
682 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and
683 * by main() when reading the MAKEFLAGS environment variable.
684 */
685 void
Main_ParseArgLine(const char * line)686 Main_ParseArgLine(const char *line)
687 {
688 Words words;
689 char *buf;
690
691 if (line == NULL)
692 return;
693 /* XXX: don't use line as an iterator variable */
694 for (; *line == ' '; line++)
695 continue;
696 if (line[0] == '\0')
697 return;
698
699 #ifndef POSIX
700 {
701 /*
702 * $MAKE may simply be naming the make(1) binary
703 */
704 char *cp;
705
706 if (!(cp = strrchr(line, '/')))
707 cp = line;
708 if ((cp = strstr(cp, "make")) &&
709 strcmp(cp, "make") == 0)
710 return;
711 }
712 #endif
713 {
714 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE");
715 buf = str_concat3(argv0.str, " ", line);
716 FStr_Done(&argv0);
717 }
718
719 words = Str_Words(buf, true);
720 if (words.words == NULL) {
721 Error("Unterminated quoted string [%s]", buf);
722 free(buf);
723 return;
724 }
725 free(buf);
726 MainParseArgs((int)words.len, words.words);
727
728 Words_Free(words);
729 }
730
731 bool
Main_SetObjdir(bool writable,const char * fmt,...)732 Main_SetObjdir(bool writable, const char *fmt, ...)
733 {
734 struct stat sb;
735 char *path;
736 char buf[MAXPATHLEN + 1];
737 char buf2[MAXPATHLEN + 1];
738 bool rc = false;
739 va_list ap;
740
741 va_start(ap, fmt);
742 vsnprintf(path = buf, MAXPATHLEN, fmt, ap);
743 va_end(ap);
744
745 if (path[0] != '/') {
746 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path);
747 path = buf2;
748 }
749
750 /* look for the directory and try to chdir there */
751 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
752 if ((writable && access(path, W_OK) != 0) ||
753 (chdir(path) != 0)) {
754 (void)fprintf(stderr, "%s warning: %s: %s.\n",
755 progname, path, strerror(errno));
756 } else {
757 snprintf(objdir, sizeof objdir, "%s", path);
758 Global_Set(".OBJDIR", objdir);
759 setenv("PWD", objdir, 1);
760 Dir_InitDot();
761 purge_relative_cached_realpaths();
762 rc = true;
763 if (opts.enterFlag && strcmp(objdir, curdir) != 0)
764 enterFlagObj = true;
765 }
766 }
767
768 return rc;
769 }
770
771 static bool
SetVarObjdir(bool writable,const char * var,const char * suffix)772 SetVarObjdir(bool writable, const char *var, const char *suffix)
773 {
774 FStr path = Var_Value(SCOPE_CMDLINE, var);
775 FStr xpath;
776
777 if (path.str == NULL || path.str[0] == '\0') {
778 FStr_Done(&path);
779 return false;
780 }
781
782 /* expand variable substitutions */
783 xpath = FStr_InitRefer(path.str);
784 if (strchr(path.str, '$') != 0) {
785 char *expanded;
786 (void)Var_Subst(path.str, SCOPE_GLOBAL, VARE_WANTRES, &expanded);
787 /* TODO: handle errors */
788 xpath = FStr_InitOwn(expanded);
789 }
790
791 (void)Main_SetObjdir(writable, "%s%s", xpath.str, suffix);
792
793 FStr_Done(&xpath);
794 FStr_Done(&path);
795 return true;
796 }
797
798 /*
799 * Splits str into words, adding them to the list.
800 * The string must be kept alive as long as the list.
801 */
802 int
str2Lst_Append(StringList * lp,char * str)803 str2Lst_Append(StringList *lp, char *str)
804 {
805 char *cp;
806 int n;
807
808 const char *sep = " \t";
809
810 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) {
811 Lst_Append(lp, cp);
812 n++;
813 }
814 return n;
815 }
816
817 #ifdef SIGINFO
818 /*ARGSUSED*/
819 static void
siginfo(int signo MAKE_ATTR_UNUSED)820 siginfo(int signo MAKE_ATTR_UNUSED)
821 {
822 char dir[MAXPATHLEN];
823 char str[2 * MAXPATHLEN];
824 int len;
825 if (getcwd(dir, sizeof dir) == NULL)
826 return;
827 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir);
828 if (len > 0)
829 (void)write(STDERR_FILENO, str, (size_t)len);
830 }
831 #endif
832
833 /* Allow makefiles some control over the mode we run in. */
834 static void
MakeMode(void)835 MakeMode(void)
836 {
837 char *mode;
838
839 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode);
840 /* TODO: handle errors */
841
842 if (mode[0] != '\0') {
843 if (strstr(mode, "compat") != NULL) {
844 opts.compatMake = true;
845 forceJobs = false;
846 }
847 #if USE_META
848 if (strstr(mode, "meta") != NULL)
849 meta_mode_init(mode);
850 #endif
851 }
852
853 free(mode);
854 }
855
856 static void
PrintVar(const char * varname,bool expandVars)857 PrintVar(const char *varname, bool expandVars)
858 {
859 if (strchr(varname, '$') != NULL) {
860 char *evalue;
861 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue);
862 /* TODO: handle errors */
863 printf("%s\n", evalue);
864 bmake_free(evalue);
865
866 } else if (expandVars) {
867 char *expr = str_concat3("${", varname, "}");
868 char *evalue;
869 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue);
870 /* TODO: handle errors */
871 free(expr);
872 printf("%s\n", evalue);
873 bmake_free(evalue);
874
875 } else {
876 FStr value = Var_Value(SCOPE_GLOBAL, varname);
877 printf("%s\n", value.str != NULL ? value.str : "");
878 FStr_Done(&value);
879 }
880 }
881
882 /*
883 * Return a bool based on a variable.
884 *
885 * If the knob is not set, return the fallback.
886 * If set, anything that looks or smells like "No", "False", "Off", "0", etc.
887 * is false, otherwise true.
888 */
889 bool
GetBooleanExpr(const char * expr,bool fallback)890 GetBooleanExpr(const char *expr, bool fallback)
891 {
892 char *value;
893 bool res;
894
895 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value);
896 /* TODO: handle errors */
897 res = ParseBoolean(value, fallback);
898 free(value);
899 return res;
900 }
901
902 static void
doPrintVars(void)903 doPrintVars(void)
904 {
905 StringListNode *ln;
906 bool expandVars;
907
908 if (opts.printVars == PVM_EXPANDED)
909 expandVars = true;
910 else if (opts.debugVflag)
911 expandVars = false;
912 else
913 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}",
914 false);
915
916 for (ln = opts.variables.first; ln != NULL; ln = ln->next) {
917 const char *varname = ln->datum;
918 PrintVar(varname, expandVars);
919 }
920 }
921
922 static bool
runTargets(void)923 runTargets(void)
924 {
925 GNodeList targs = LST_INIT; /* target nodes to create */
926 bool outOfDate; /* false if all targets up to date */
927
928 /*
929 * Have now read the entire graph and need to make a list of
930 * targets to create. If none was given on the command line,
931 * we consult the parsing module to find the main target(s)
932 * to create.
933 */
934 if (Lst_IsEmpty(&opts.create))
935 Parse_MainName(&targs);
936 else
937 Targ_FindList(&targs, &opts.create);
938
939 if (!opts.compatMake) {
940 /*
941 * Initialize job module before traversing the graph
942 * now that any .BEGIN and .END targets have been read.
943 * This is done only if the -q flag wasn't given
944 * (to prevent the .BEGIN from being executed should
945 * it exist).
946 */
947 if (!opts.queryFlag) {
948 Job_Init();
949 jobsRunning = true;
950 }
951
952 /* Traverse the graph, checking on all the targets */
953 outOfDate = Make_Run(&targs);
954 } else {
955 /*
956 * Compat_Init will take care of creating all the
957 * targets as well as initializing the module.
958 */
959 Compat_Run(&targs);
960 outOfDate = false;
961 }
962 Lst_Done(&targs); /* Don't free the targets themselves. */
963 return outOfDate;
964 }
965
966 /*
967 * Set up the .TARGETS variable to contain the list of targets to be
968 * created. If none specified, make the variable empty -- the parser
969 * will fill the thing in with the default or .MAIN target.
970 */
971 static void
InitVarTargets(void)972 InitVarTargets(void)
973 {
974 StringListNode *ln;
975
976 if (Lst_IsEmpty(&opts.create)) {
977 Global_Set(".TARGETS", "");
978 return;
979 }
980
981 for (ln = opts.create.first; ln != NULL; ln = ln->next) {
982 const char *name = ln->datum;
983 Global_Append(".TARGETS", name);
984 }
985 }
986
987 static void
InitRandom(void)988 InitRandom(void)
989 {
990 struct timeval tv;
991
992 gettimeofday(&tv, NULL);
993 srandom((unsigned int)(tv.tv_sec + tv.tv_usec));
994 }
995
996 static const char *
InitVarMachine(const struct utsname * utsname MAKE_ATTR_UNUSED)997 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED)
998 {
999 #ifdef FORCE_MACHINE
1000 return FORCE_MACHINE;
1001 #else
1002 const char *machine = getenv("MACHINE");
1003
1004 if (machine != NULL)
1005 return machine;
1006
1007 #if defined(MAKE_NATIVE)
1008 return utsname->machine;
1009 #elif defined(MAKE_MACHINE)
1010 return MAKE_MACHINE;
1011 #else
1012 return "unknown";
1013 #endif
1014 #endif
1015 }
1016
1017 static const char *
InitVarMachineArch(void)1018 InitVarMachineArch(void)
1019 {
1020 #ifdef FORCE_MACHINE_ARCH
1021 return FORCE_MACHINE_ARCH;
1022 #else
1023 const char *env = getenv("MACHINE_ARCH");
1024 if (env != NULL)
1025 return env;
1026
1027 #if defined(MAKE_NATIVE) && defined(CTL_HW)
1028 {
1029 struct utsname utsname;
1030 static char machine_arch_buf[sizeof utsname.machine];
1031 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
1032 size_t len = sizeof machine_arch_buf;
1033
1034 if (sysctl(mib, (unsigned int)__arraycount(mib),
1035 machine_arch_buf, &len, NULL, 0) < 0) {
1036 (void)fprintf(stderr, "%s: sysctl failed (%s).\n",
1037 progname, strerror(errno));
1038 exit(2);
1039 }
1040
1041 return machine_arch_buf;
1042 }
1043 #elif defined(MACHINE_ARCH)
1044 return MACHINE_ARCH;
1045 #elif defined(MAKE_MACHINE_ARCH)
1046 return MAKE_MACHINE_ARCH;
1047 #else
1048 return "unknown";
1049 #endif
1050 #endif
1051 }
1052
1053 #ifndef NO_PWD_OVERRIDE
1054 /*
1055 * All this code is so that we know where we are when we start up
1056 * on a different machine with pmake.
1057 *
1058 * XXX: Make no longer has "local" and "remote" mode. Is this code still
1059 * necessary?
1060 *
1061 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1062 * since the value of curdir can vary depending on how we got
1063 * here. Ie sitting at a shell prompt (shell that provides $PWD)
1064 * or via subdir.mk in which case its likely a shell which does
1065 * not provide it.
1066 *
1067 * So, to stop it breaking this case only, we ignore PWD if
1068 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression.
1069 */
1070 static void
HandlePWD(const struct stat * curdir_st)1071 HandlePWD(const struct stat *curdir_st)
1072 {
1073 char *pwd;
1074 FStr prefix, makeobjdir;
1075 struct stat pwd_st;
1076
1077 if (ignorePWD || (pwd = getenv("PWD")) == NULL)
1078 return;
1079
1080 prefix = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX");
1081 if (prefix.str != NULL) {
1082 FStr_Done(&prefix);
1083 return;
1084 }
1085
1086 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR");
1087 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL)
1088 goto ignore_pwd;
1089
1090 if (stat(pwd, &pwd_st) == 0 &&
1091 curdir_st->st_ino == pwd_st.st_ino &&
1092 curdir_st->st_dev == pwd_st.st_dev)
1093 (void)strncpy(curdir, pwd, MAXPATHLEN);
1094
1095 ignore_pwd:
1096 FStr_Done(&makeobjdir);
1097 }
1098 #endif
1099
1100 /*
1101 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that,
1102 * MAKEOBJDIR is set in the environment, try only that value
1103 * and fall back to .CURDIR if it does not exist.
1104 *
1105 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
1106 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none
1107 * of these paths exist, just use .CURDIR.
1108 */
1109 static void
InitObjdir(const char * machine,const char * machine_arch)1110 InitObjdir(const char *machine, const char *machine_arch)
1111 {
1112 bool writable;
1113
1114 Dir_InitCur(curdir);
1115 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true);
1116 (void)Main_SetObjdir(false, "%s", curdir);
1117
1118 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) &&
1119 !SetVarObjdir(writable, "MAKEOBJDIR", "") &&
1120 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
1121 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) &&
1122 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR))
1123 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir);
1124 }
1125
1126 /* get rid of resource limit on file descriptors */
1127 static void
UnlimitFiles(void)1128 UnlimitFiles(void)
1129 {
1130 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE))
1131 struct rlimit rl;
1132 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
1133 rl.rlim_cur != rl.rlim_max) {
1134 rl.rlim_cur = rl.rlim_max;
1135 (void)setrlimit(RLIMIT_NOFILE, &rl);
1136 }
1137 #endif
1138 }
1139
1140 static void
CmdOpts_Init(void)1141 CmdOpts_Init(void)
1142 {
1143 opts.compatMake = false;
1144 opts.debug = DEBUG_NONE;
1145 /* opts.debug_file has already been initialized earlier */
1146 opts.strict = false;
1147 opts.debugVflag = false;
1148 opts.checkEnvFirst = false;
1149 Lst_Init(&opts.makefiles);
1150 opts.ignoreErrors = false; /* Pay attention to non-zero returns */
1151 opts.maxJobs = 1;
1152 opts.keepgoing = false; /* Stop on error */
1153 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */
1154 opts.noExecute = false; /* Execute all commands */
1155 opts.queryFlag = false;
1156 opts.noBuiltins = false; /* Read the built-in rules */
1157 opts.beSilent = false; /* Print commands as executed */
1158 opts.touchFlag = false;
1159 opts.printVars = PVM_NONE;
1160 Lst_Init(&opts.variables);
1161 opts.parseWarnFatal = false;
1162 opts.enterFlag = false;
1163 opts.varNoExportEnv = false;
1164 Lst_Init(&opts.create);
1165 }
1166
1167 /*
1168 * Initialize MAKE and .MAKE to the path of the executable, so that it can be
1169 * found by execvp(3) and the shells, even after a chdir.
1170 *
1171 * If it's a relative path and contains a '/', resolve it to an absolute path.
1172 * Otherwise keep it as is, assuming it will be found in the PATH.
1173 */
1174 static void
InitVarMake(const char * argv0)1175 InitVarMake(const char *argv0)
1176 {
1177 const char *make = argv0;
1178
1179 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) {
1180 char pathbuf[MAXPATHLEN];
1181 const char *abspath = cached_realpath(argv0, pathbuf);
1182 struct stat st;
1183 if (abspath != NULL && abspath[0] == '/' &&
1184 stat(make, &st) == 0)
1185 make = abspath;
1186 }
1187
1188 Global_Set("MAKE", make);
1189 Global_Set(".MAKE", make);
1190 }
1191
1192 /*
1193 * Add the directories from the colon-separated syspath to defSysIncPath.
1194 * After returning, the contents of syspath is unspecified.
1195 */
1196 static void
InitDefSysIncPath(char * syspath)1197 InitDefSysIncPath(char *syspath)
1198 {
1199 static char defsyspath[] = _PATH_DEFSYSPATH;
1200 char *start, *cp;
1201
1202 /*
1203 * If no user-supplied system path was given (through the -m option)
1204 * add the directories from the DEFSYSPATH (more than one may be given
1205 * as dir1:...:dirn) to the system include path.
1206 */
1207 if (syspath == NULL || syspath[0] == '\0')
1208 syspath = defsyspath;
1209 else
1210 syspath = bmake_strdup(syspath);
1211
1212 for (start = syspath; *start != '\0'; start = cp) {
1213 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
1214 continue;
1215 if (*cp == ':')
1216 *cp++ = '\0';
1217
1218 /* look for magic parent directory search string */
1219 if (strncmp(start, ".../", 4) == 0) {
1220 char *dir = Dir_FindHereOrAbove(curdir, start + 4);
1221 if (dir != NULL) {
1222 (void)SearchPath_Add(defSysIncPath, dir);
1223 free(dir);
1224 }
1225 } else {
1226 (void)SearchPath_Add(defSysIncPath, start);
1227 }
1228 }
1229
1230 if (syspath != defsyspath)
1231 free(syspath);
1232 }
1233
1234 static void
ReadBuiltinRules(void)1235 ReadBuiltinRules(void)
1236 {
1237 StringListNode *ln;
1238 StringList sysMkFiles = LST_INIT;
1239
1240 SearchPath_Expand(
1241 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath,
1242 _PATH_DEFSYSMK,
1243 &sysMkFiles);
1244 if (Lst_IsEmpty(&sysMkFiles))
1245 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK);
1246
1247 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next)
1248 if (ReadMakefile(ln->datum) == 0)
1249 break;
1250
1251 if (ln == NULL)
1252 Fatal("%s: cannot open %s.",
1253 progname, (const char *)sysMkFiles.first->datum);
1254
1255 /* Free the list nodes but not the actual filenames since these may
1256 * still be used in GNodes. */
1257 Lst_Done(&sysMkFiles);
1258 }
1259
1260 static void
InitMaxJobs(void)1261 InitMaxJobs(void)
1262 {
1263 char *value;
1264 int n;
1265
1266 if (forceJobs || opts.compatMake ||
1267 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS"))
1268 return;
1269
1270 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value);
1271 /* TODO: handle errors */
1272 n = (int)strtol(value, NULL, 0);
1273 if (n < 1) {
1274 (void)fprintf(stderr,
1275 "%s: illegal value for .MAKE.JOBS "
1276 "-- must be positive integer!\n",
1277 progname);
1278 exit(2); /* Not 1 so -q can distinguish error */
1279 }
1280
1281 if (n != opts.maxJobs) {
1282 Global_Append(MAKEFLAGS, "-j");
1283 Global_Append(MAKEFLAGS, value);
1284 }
1285
1286 opts.maxJobs = n;
1287 maxJobTokens = opts.maxJobs;
1288 forceJobs = true;
1289 free(value);
1290 }
1291
1292 /*
1293 * For compatibility, look at the directories in the VPATH variable
1294 * and add them to the search path, if the variable is defined. The
1295 * variable's value is in the same format as the PATH environment
1296 * variable, i.e. <directory>:<directory>:<directory>...
1297 */
1298 static void
InitVpath(void)1299 InitVpath(void)
1300 {
1301 char *vpath, savec, *path;
1302 if (!Var_Exists(SCOPE_CMDLINE, "VPATH"))
1303 return;
1304
1305 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath);
1306 /* TODO: handle errors */
1307 path = vpath;
1308 do {
1309 char *cp;
1310 /* skip to end of directory */
1311 for (cp = path; *cp != ':' && *cp != '\0'; cp++)
1312 continue;
1313 /* Save terminator character so know when to stop */
1314 savec = *cp;
1315 *cp = '\0';
1316 /* Add directory to search path */
1317 (void)SearchPath_Add(&dirSearchPath, path);
1318 *cp = savec;
1319 path = cp + 1;
1320 } while (savec == ':');
1321 free(vpath);
1322 }
1323
1324 static void
ReadAllMakefiles(StringList * makefiles)1325 ReadAllMakefiles(StringList *makefiles)
1326 {
1327 StringListNode *ln;
1328
1329 for (ln = makefiles->first; ln != NULL; ln = ln->next) {
1330 const char *fname = ln->datum;
1331 if (ReadMakefile(fname) != 0)
1332 Fatal("%s: cannot open %s.", progname, fname);
1333 }
1334 }
1335
1336 static void
ReadFirstDefaultMakefile(void)1337 ReadFirstDefaultMakefile(void)
1338 {
1339 StringListNode *ln;
1340 char *prefs;
1341
1342 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}",
1343 SCOPE_CMDLINE, VARE_WANTRES, &prefs);
1344 /* TODO: handle errors */
1345
1346 /* XXX: This should use a local list instead of opts.makefiles
1347 * since these makefiles do not come from the command line. They
1348 * also have different semantics in that only the first file that
1349 * is found is processed. See ReadAllMakefiles. */
1350 (void)str2Lst_Append(&opts.makefiles, prefs);
1351
1352 for (ln = opts.makefiles.first; ln != NULL; ln = ln->next)
1353 if (ReadMakefile(ln->datum) == 0)
1354 break;
1355
1356 free(prefs);
1357 }
1358
1359 /*
1360 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS.
1361 * Initialize a few modules.
1362 * Parse the arguments from MAKEFLAGS and the command line.
1363 */
1364 static void
main_Init(int argc,char ** argv)1365 main_Init(int argc, char **argv)
1366 {
1367 struct stat sa;
1368 const char *machine;
1369 const char *machine_arch;
1370 char *syspath = getenv("MAKESYSPATH");
1371 struct utsname utsname;
1372
1373 /* default to writing debug to stderr */
1374 opts.debug_file = stderr;
1375
1376 HashTable_Init(&cached_realpaths);
1377
1378 #ifdef SIGINFO
1379 (void)bmake_signal(SIGINFO, siginfo);
1380 #endif
1381
1382 InitRandom();
1383
1384 progname = str_basename(argv[0]);
1385
1386 UnlimitFiles();
1387
1388 if (uname(&utsname) == -1) {
1389 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
1390 strerror(errno));
1391 exit(2);
1392 }
1393
1394 /*
1395 * Get the name of this type of MACHINE from utsname
1396 * so we can share an executable for similar machines.
1397 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
1398 *
1399 * Note that both MACHINE and MACHINE_ARCH are decided at
1400 * run-time.
1401 */
1402 machine = InitVarMachine(&utsname);
1403 machine_arch = InitVarMachineArch();
1404
1405 myPid = getpid(); /* remember this for vFork() */
1406
1407 /*
1408 * Just in case MAKEOBJDIR wants us to do something tricky.
1409 */
1410 Targ_Init();
1411 Var_Init();
1412 Global_Set(".MAKE.OS", utsname.sysname);
1413 Global_Set("MACHINE", machine);
1414 Global_Set("MACHINE_ARCH", machine_arch);
1415 #ifdef MAKE_VERSION
1416 Global_Set("MAKE_VERSION", MAKE_VERSION);
1417 #endif
1418 Global_Set(".newline", "\n"); /* handy for :@ loops */
1419 /*
1420 * This is the traditional preference for makefiles.
1421 */
1422 #ifndef MAKEFILE_PREFERENCE_LIST
1423 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
1424 #endif
1425 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST);
1426 Global_Set(MAKE_DEPENDFILE, ".depend");
1427
1428 CmdOpts_Init();
1429 allPrecious = false; /* Remove targets when interrupted */
1430 deleteOnError = false; /* Historical default behavior */
1431 jobsRunning = false;
1432
1433 maxJobTokens = opts.maxJobs;
1434 ignorePWD = false;
1435
1436 /*
1437 * Initialize the parsing, directory and variable modules to prepare
1438 * for the reading of inclusion paths and variable settings on the
1439 * command line
1440 */
1441
1442 /*
1443 * Initialize various variables.
1444 * MAKE also gets this name, for compatibility
1445 * .MAKEFLAGS gets set to the empty string just in case.
1446 * MFLAGS also gets initialized empty, for compatibility.
1447 */
1448 Parse_Init();
1449 InitVarMake(argv[0]);
1450 Global_Set(MAKEFLAGS, "");
1451 Global_Set(MAKEOVERRIDES, "");
1452 Global_Set("MFLAGS", "");
1453 Global_Set(".ALLTARGETS", "");
1454 /* some makefiles need to know this */
1455 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV);
1456
1457 /* Set some other useful variables. */
1458 {
1459 char tmp[64], *ep = getenv(MAKE_LEVEL_ENV);
1460
1461 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0;
1462 if (makelevel < 0)
1463 makelevel = 0;
1464 snprintf(tmp, sizeof tmp, "%d", makelevel);
1465 Global_Set(MAKE_LEVEL, tmp);
1466 snprintf(tmp, sizeof tmp, "%u", myPid);
1467 Global_Set(".MAKE.PID", tmp);
1468 snprintf(tmp, sizeof tmp, "%u", getppid());
1469 Global_Set(".MAKE.PPID", tmp);
1470 snprintf(tmp, sizeof tmp, "%u", getuid());
1471 Global_Set(".MAKE.UID", tmp);
1472 snprintf(tmp, sizeof tmp, "%u", getgid());
1473 Global_Set(".MAKE.GID", tmp);
1474 }
1475 if (makelevel > 0) {
1476 char pn[1024];
1477 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel);
1478 progname = bmake_strdup(pn);
1479 }
1480
1481 #ifdef USE_META
1482 meta_init();
1483 #endif
1484 Dir_Init();
1485
1486 /*
1487 * First snag any flags out of the MAKE environment variable.
1488 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
1489 * in a different format).
1490 */
1491 #ifdef POSIX
1492 {
1493 char *p1 = explode(getenv("MAKEFLAGS"));
1494 Main_ParseArgLine(p1);
1495 free(p1);
1496 }
1497 #else
1498 Main_ParseArgLine(getenv("MAKE"));
1499 #endif
1500
1501 /*
1502 * Find where we are (now).
1503 * We take care of PWD for the automounter below...
1504 */
1505 if (getcwd(curdir, MAXPATHLEN) == NULL) {
1506 (void)fprintf(stderr, "%s: getcwd: %s.\n",
1507 progname, strerror(errno));
1508 exit(2);
1509 }
1510
1511 MainParseArgs(argc, argv);
1512
1513 if (opts.enterFlag)
1514 printf("%s: Entering directory `%s'\n", progname, curdir);
1515
1516 /*
1517 * Verify that cwd is sane.
1518 */
1519 if (stat(curdir, &sa) == -1) {
1520 (void)fprintf(stderr, "%s: %s: %s.\n",
1521 progname, curdir, strerror(errno));
1522 exit(2);
1523 }
1524
1525 #ifndef NO_PWD_OVERRIDE
1526 HandlePWD(&sa);
1527 #endif
1528 Global_Set(".CURDIR", curdir);
1529
1530 InitObjdir(machine, machine_arch);
1531
1532 /*
1533 * Initialize archive, target and suffix modules in preparation for
1534 * parsing the makefile(s)
1535 */
1536 Arch_Init();
1537 Suff_Init();
1538 Trace_Init(tracefile);
1539
1540 defaultNode = NULL;
1541 (void)time(&now);
1542
1543 Trace_Log(MAKESTART, NULL);
1544
1545 InitVarTargets();
1546
1547 InitDefSysIncPath(syspath);
1548 }
1549
1550 /*
1551 * Read the system makefile followed by either makefile, Makefile or the
1552 * files given by the -f option. Exit on parse errors.
1553 */
1554 static void
main_ReadFiles(void)1555 main_ReadFiles(void)
1556 {
1557
1558 if (!opts.noBuiltins)
1559 ReadBuiltinRules();
1560
1561 if (!Lst_IsEmpty(&opts.makefiles))
1562 ReadAllMakefiles(&opts.makefiles);
1563 else
1564 ReadFirstDefaultMakefile();
1565 }
1566
1567 /* Compute the dependency graph. */
1568 static void
main_PrepareMaking(void)1569 main_PrepareMaking(void)
1570 {
1571 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1572 if (!opts.noBuiltins || opts.printVars == PVM_NONE) {
1573 (void)Var_Subst("${.MAKE.DEPENDFILE}",
1574 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile);
1575 if (makeDependfile[0] != '\0') {
1576 /* TODO: handle errors */
1577 doing_depend = true;
1578 (void)ReadMakefile(makeDependfile);
1579 doing_depend = false;
1580 }
1581 }
1582
1583 if (enterFlagObj)
1584 printf("%s: Entering directory `%s'\n", progname, objdir);
1585
1586 MakeMode();
1587
1588 {
1589 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS);
1590 Global_Append("MFLAGS", makeflags.str);
1591 FStr_Done(&makeflags);
1592 }
1593
1594 InitMaxJobs();
1595
1596 /*
1597 * Be compatible if the user did not specify -j and did not explicitly
1598 * turn compatibility on.
1599 */
1600 if (!opts.compatMake && !forceJobs)
1601 opts.compatMake = true;
1602
1603 if (!opts.compatMake)
1604 Job_ServerStart(maxJobTokens, jp_0, jp_1);
1605 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1606 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0);
1607
1608 if (opts.printVars == PVM_NONE)
1609 Main_ExportMAKEFLAGS(true); /* initial export */
1610
1611 InitVpath();
1612
1613 /*
1614 * Now that all search paths have been read for suffixes et al, it's
1615 * time to add the default search path to their lists...
1616 */
1617 Suff_ExtendPaths();
1618
1619 /*
1620 * Propagate attributes through :: dependency lists.
1621 */
1622 Targ_Propagate();
1623
1624 /* print the initial graph, if the user requested it */
1625 if (DEBUG(GRAPH1))
1626 Targ_PrintGraph(1);
1627 }
1628
1629 /*
1630 * Make the targets.
1631 * If the -v or -V options are given, print variables instead.
1632 * Return whether any of the targets is out-of-date.
1633 */
1634 static bool
main_Run(void)1635 main_Run(void)
1636 {
1637 if (opts.printVars != PVM_NONE) {
1638 /* print the values of any variables requested by the user */
1639 doPrintVars();
1640 return false;
1641 } else {
1642 return runTargets();
1643 }
1644 }
1645
1646 /* Clean up after making the targets. */
1647 static void
main_CleanUp(void)1648 main_CleanUp(void)
1649 {
1650 #ifdef CLEANUP
1651 Lst_DoneCall(&opts.variables, free);
1652 /*
1653 * Don't free the actual strings from opts.makefiles, they may be
1654 * used in GNodes.
1655 */
1656 Lst_Done(&opts.makefiles);
1657 Lst_DoneCall(&opts.create, free);
1658 #endif
1659
1660 /* print the graph now it's been processed if the user requested it */
1661 if (DEBUG(GRAPH2))
1662 Targ_PrintGraph(2);
1663
1664 Trace_Log(MAKEEND, NULL);
1665
1666 if (enterFlagObj)
1667 printf("%s: Leaving directory `%s'\n", progname, objdir);
1668 if (opts.enterFlag)
1669 printf("%s: Leaving directory `%s'\n", progname, curdir);
1670
1671 #ifdef USE_META
1672 meta_finish();
1673 #endif
1674 Suff_End();
1675 Targ_End();
1676 Arch_End();
1677 Var_End();
1678 Parse_End();
1679 Dir_End();
1680 Job_End();
1681 Trace_End();
1682 }
1683
1684 /* Determine the exit code. */
1685 static int
main_Exit(bool outOfDate)1686 main_Exit(bool outOfDate)
1687 {
1688 if (opts.strict && (main_errors > 0 || Parse_GetFatals() > 0))
1689 return 2; /* Not 1 so -q can distinguish error */
1690 return outOfDate ? 1 : 0;
1691 }
1692
1693 int
main(int argc,char ** argv)1694 main(int argc, char **argv)
1695 {
1696 bool outOfDate;
1697
1698 main_Init(argc, argv);
1699 main_ReadFiles();
1700 main_PrepareMaking();
1701 outOfDate = main_Run();
1702 main_CleanUp();
1703 return main_Exit(outOfDate);
1704 }
1705
1706 /*
1707 * Open and parse the given makefile, with all its side effects.
1708 *
1709 * Results:
1710 * 0 if ok. -1 if couldn't open file.
1711 */
1712 static int
ReadMakefile(const char * fname)1713 ReadMakefile(const char *fname)
1714 {
1715 int fd;
1716 char *name, *path = NULL;
1717
1718 if (strcmp(fname, "-") == 0) {
1719 Parse_File(NULL /*stdin*/, -1);
1720 Var_Set(SCOPE_INTERNAL, "MAKEFILE", "");
1721 } else {
1722 /* if we've chdir'd, rebuild the path name */
1723 if (strcmp(curdir, objdir) != 0 && *fname != '/') {
1724 path = str_concat3(curdir, "/", fname);
1725 fd = open(path, O_RDONLY);
1726 if (fd != -1) {
1727 fname = path;
1728 goto found;
1729 }
1730 free(path);
1731
1732 /* If curdir failed, try objdir (ala .depend) */
1733 path = str_concat3(objdir, "/", fname);
1734 fd = open(path, O_RDONLY);
1735 if (fd != -1) {
1736 fname = path;
1737 goto found;
1738 }
1739 } else {
1740 fd = open(fname, O_RDONLY);
1741 if (fd != -1)
1742 goto found;
1743 }
1744 /* look in -I and system include directories. */
1745 name = Dir_FindFile(fname, parseIncPath);
1746 if (name == NULL) {
1747 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs)
1748 ? defSysIncPath : sysIncPath;
1749 name = Dir_FindFile(fname, sysInc);
1750 }
1751 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) {
1752 free(name);
1753 free(path);
1754 return -1;
1755 }
1756 fname = name;
1757 /*
1758 * set the MAKEFILE variable desired by System V fans -- the
1759 * placement of the setting here means it gets set to the last
1760 * makefile specified, as it is set by SysV make.
1761 */
1762 found:
1763 if (!doing_depend)
1764 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname);
1765 Parse_File(fname, fd);
1766 }
1767 free(path);
1768 return 0;
1769 }
1770
1771 /*
1772 * Cmd_Exec --
1773 * Execute the command in cmd, and return the output of that command
1774 * in a string. In the output, newlines are replaced with spaces.
1775 *
1776 * Results:
1777 * A string containing the output of the command, or the empty string.
1778 * *errfmt returns a format string describing the command failure,
1779 * if any, using a single %s conversion specification.
1780 *
1781 * Side Effects:
1782 * The string must be freed by the caller.
1783 */
1784 char *
Cmd_Exec(const char * cmd,const char ** errfmt)1785 Cmd_Exec(const char *cmd, const char **errfmt)
1786 {
1787 const char *args[4]; /* Args for invoking the shell */
1788 int pipefds[2];
1789 int cpid; /* Child PID */
1790 int pid; /* PID from wait() */
1791 int status; /* command exit status */
1792 Buffer buf; /* buffer to store the result */
1793 ssize_t bytes_read;
1794 char *res; /* result */
1795 size_t res_len;
1796 char *cp;
1797 int savederr; /* saved errno */
1798
1799 *errfmt = NULL;
1800
1801 if (shellName == NULL)
1802 Shell_Init();
1803 /*
1804 * Set up arguments for shell
1805 */
1806 args[0] = shellName;
1807 args[1] = "-c";
1808 args[2] = cmd;
1809 args[3] = NULL;
1810
1811 /*
1812 * Open a pipe for fetching its output
1813 */
1814 if (pipe(pipefds) == -1) {
1815 *errfmt = "Couldn't create pipe for \"%s\"";
1816 goto bad;
1817 }
1818
1819 Var_ReexportVars();
1820
1821 /*
1822 * Fork
1823 */
1824 switch (cpid = vfork()) {
1825 case 0:
1826 (void)close(pipefds[0]); /* Close input side of pipe */
1827
1828 /*
1829 * Duplicate the output stream to the shell's output, then
1830 * shut the extra thing down. Note we don't fetch the error
1831 * stream...why not? Why?
1832 */
1833 (void)dup2(pipefds[1], 1);
1834 (void)close(pipefds[1]);
1835
1836 (void)execv(shellPath, UNCONST(args));
1837 _exit(1);
1838 /*NOTREACHED*/
1839
1840 case -1:
1841 *errfmt = "Couldn't exec \"%s\"";
1842 goto bad;
1843
1844 default:
1845 (void)close(pipefds[1]); /* No need for the writing half */
1846
1847 savederr = 0;
1848 Buf_Init(&buf);
1849
1850 do {
1851 char result[BUFSIZ];
1852 bytes_read = read(pipefds[0], result, sizeof result);
1853 if (bytes_read > 0)
1854 Buf_AddBytes(&buf, result, (size_t)bytes_read);
1855 } while (bytes_read > 0 ||
1856 (bytes_read == -1 && errno == EINTR));
1857 if (bytes_read == -1)
1858 savederr = errno;
1859
1860 (void)close(pipefds[0]); /* Close the input side of the pipe. */
1861
1862 /* Wait for the process to exit. */
1863 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0)
1864 JobReapChild(pid, status, false);
1865
1866 res_len = buf.len;
1867 res = Buf_DoneData(&buf);
1868
1869 if (savederr != 0)
1870 *errfmt = "Couldn't read shell's output for \"%s\"";
1871
1872 if (WIFSIGNALED(status))
1873 *errfmt = "\"%s\" exited on a signal";
1874 else if (WEXITSTATUS(status) != 0)
1875 *errfmt = "\"%s\" returned non-zero status";
1876
1877 /* Convert newlines to spaces. A final newline is just stripped */
1878 if (res_len > 0 && res[res_len - 1] == '\n')
1879 res[res_len - 1] = '\0';
1880 for (cp = res; *cp != '\0'; cp++)
1881 if (*cp == '\n')
1882 *cp = ' ';
1883 break;
1884 }
1885 return res;
1886 bad:
1887 return bmake_strdup("");
1888 }
1889
1890 /*
1891 * Print a printf-style error message.
1892 *
1893 * In default mode, this error message has no consequences, in particular it
1894 * does not affect the exit status. Only in lint mode (-dL) it does.
1895 */
1896 void
Error(const char * fmt,...)1897 Error(const char *fmt, ...)
1898 {
1899 va_list ap;
1900 FILE *err_file;
1901
1902 err_file = opts.debug_file;
1903 if (err_file == stdout)
1904 err_file = stderr;
1905 (void)fflush(stdout);
1906 for (;;) {
1907 va_start(ap, fmt);
1908 fprintf(err_file, "%s: ", progname);
1909 (void)vfprintf(err_file, fmt, ap);
1910 va_end(ap);
1911 (void)fprintf(err_file, "\n");
1912 (void)fflush(err_file);
1913 if (err_file == stderr)
1914 break;
1915 err_file = stderr;
1916 }
1917 main_errors++;
1918 }
1919
1920 /*
1921 * Wait for any running jobs to finish, then produce an error message,
1922 * finally exit immediately.
1923 *
1924 * Exiting immediately differs from Parse_Error, which exits only after the
1925 * current top-level makefile has been parsed completely.
1926 */
1927 void
Fatal(const char * fmt,...)1928 Fatal(const char *fmt, ...)
1929 {
1930 va_list ap;
1931
1932 if (jobsRunning)
1933 Job_Wait();
1934
1935 (void)fflush(stdout);
1936 va_start(ap, fmt);
1937 (void)vfprintf(stderr, fmt, ap);
1938 va_end(ap);
1939 (void)fprintf(stderr, "\n");
1940 (void)fflush(stderr);
1941
1942 PrintOnError(NULL, NULL);
1943
1944 if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1945 Targ_PrintGraph(2);
1946 Trace_Log(MAKEERROR, NULL);
1947 exit(2); /* Not 1 so -q can distinguish error */
1948 }
1949
1950 /*
1951 * Major exception once jobs are being created.
1952 * Kills all jobs, prints a message and exits.
1953 */
1954 void
Punt(const char * fmt,...)1955 Punt(const char *fmt, ...)
1956 {
1957 va_list ap;
1958
1959 va_start(ap, fmt);
1960 (void)fflush(stdout);
1961 (void)fprintf(stderr, "%s: ", progname);
1962 (void)vfprintf(stderr, fmt, ap);
1963 va_end(ap);
1964 (void)fprintf(stderr, "\n");
1965 (void)fflush(stderr);
1966
1967 PrintOnError(NULL, NULL);
1968
1969 DieHorribly();
1970 }
1971
1972 /* Exit without giving a message. */
1973 void
DieHorribly(void)1974 DieHorribly(void)
1975 {
1976 if (jobsRunning)
1977 Job_AbortAll();
1978 if (DEBUG(GRAPH2))
1979 Targ_PrintGraph(2);
1980 Trace_Log(MAKEERROR, NULL);
1981 exit(2); /* Not 1 so -q can distinguish error */
1982 }
1983
1984 /*
1985 * Called when aborting due to errors in child shell to signal abnormal exit.
1986 * The program exits.
1987 * Errors is the number of errors encountered in Make_Make.
1988 */
1989 void
Finish(int errs)1990 Finish(int errs)
1991 {
1992 if (shouldDieQuietly(NULL, -1))
1993 exit(2);
1994 Fatal("%d error%s", errs, errs == 1 ? "" : "s");
1995 }
1996
1997 /*
1998 * eunlink --
1999 * Remove a file carefully, avoiding directories.
2000 */
2001 int
eunlink(const char * file)2002 eunlink(const char *file)
2003 {
2004 struct stat st;
2005
2006 if (lstat(file, &st) == -1)
2007 return -1;
2008
2009 if (S_ISDIR(st.st_mode)) {
2010 errno = EISDIR;
2011 return -1;
2012 }
2013 return unlink(file);
2014 }
2015
2016 static void
write_all(int fd,const void * data,size_t n)2017 write_all(int fd, const void *data, size_t n)
2018 {
2019 const char *mem = data;
2020
2021 while (n > 0) {
2022 ssize_t written = write(fd, mem, n);
2023 if (written == -1 && errno == EAGAIN)
2024 continue;
2025 if (written == -1)
2026 break;
2027 mem += written;
2028 n -= (size_t)written;
2029 }
2030 }
2031
2032 /*
2033 * execDie --
2034 * Print why exec failed, avoiding stdio.
2035 */
2036 void MAKE_ATTR_DEAD
execDie(const char * af,const char * av)2037 execDie(const char *af, const char *av)
2038 {
2039 Buffer buf;
2040
2041 Buf_Init(&buf);
2042 Buf_AddStr(&buf, progname);
2043 Buf_AddStr(&buf, ": ");
2044 Buf_AddStr(&buf, af);
2045 Buf_AddStr(&buf, "(");
2046 Buf_AddStr(&buf, av);
2047 Buf_AddStr(&buf, ") failed (");
2048 Buf_AddStr(&buf, strerror(errno));
2049 Buf_AddStr(&buf, ")\n");
2050
2051 write_all(STDERR_FILENO, buf.data, buf.len);
2052
2053 Buf_Done(&buf);
2054 _exit(1);
2055 }
2056
2057 /* purge any relative paths */
2058 static void
purge_relative_cached_realpaths(void)2059 purge_relative_cached_realpaths(void)
2060 {
2061 HashEntry *he, *nhe;
2062 HashIter hi;
2063
2064 HashIter_Init(&hi, &cached_realpaths);
2065 he = HashIter_Next(&hi);
2066 while (he != NULL) {
2067 nhe = HashIter_Next(&hi);
2068 if (he->key[0] != '/') {
2069 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key);
2070 HashTable_DeleteEntry(&cached_realpaths, he);
2071 /* XXX: What about the allocated he->value? Either
2072 * free them or document why they cannot be freed. */
2073 }
2074 he = nhe;
2075 }
2076 }
2077
2078 char *
cached_realpath(const char * pathname,char * resolved)2079 cached_realpath(const char *pathname, char *resolved)
2080 {
2081 const char *rp;
2082
2083 if (pathname == NULL || pathname[0] == '\0')
2084 return NULL;
2085
2086 rp = HashTable_FindValue(&cached_realpaths, pathname);
2087 if (rp != NULL) {
2088 /* a hit */
2089 strncpy(resolved, rp, MAXPATHLEN);
2090 resolved[MAXPATHLEN - 1] = '\0';
2091 return resolved;
2092 }
2093
2094 rp = realpath(pathname, resolved);
2095 if (rp != NULL) {
2096 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp));
2097 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp);
2098 return resolved;
2099 }
2100
2101 /* should we negative-cache? */
2102 return NULL;
2103 }
2104
2105 /*
2106 * Return true if we should die without noise.
2107 * For example our failing child was a sub-make or failure happened elsewhere.
2108 */
2109 bool
shouldDieQuietly(GNode * gn,int bf)2110 shouldDieQuietly(GNode *gn, int bf)
2111 {
2112 static int quietly = -1;
2113
2114 if (quietly < 0) {
2115 if (DEBUG(JOB) ||
2116 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true))
2117 quietly = 0;
2118 else if (bf >= 0)
2119 quietly = bf;
2120 else
2121 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0;
2122 }
2123 return quietly != 0;
2124 }
2125
2126 static void
SetErrorVars(GNode * gn)2127 SetErrorVars(GNode *gn)
2128 {
2129 StringListNode *ln;
2130
2131 /*
2132 * We can print this even if there is no .ERROR target.
2133 */
2134 Global_Set(".ERROR_TARGET", gn->name);
2135 Global_Delete(".ERROR_CMD");
2136
2137 for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
2138 const char *cmd = ln->datum;
2139
2140 if (cmd == NULL)
2141 break;
2142 Global_Append(".ERROR_CMD", cmd);
2143 }
2144 }
2145
2146 /*
2147 * Print some helpful information in case of an error.
2148 * The caller should exit soon after calling this function.
2149 */
2150 void
PrintOnError(GNode * gn,const char * msg)2151 PrintOnError(GNode *gn, const char *msg)
2152 {
2153 static GNode *errorNode = NULL;
2154
2155 if (DEBUG(HASH)) {
2156 Targ_Stats();
2157 Var_Stats();
2158 }
2159
2160 if (errorNode != NULL)
2161 return; /* we've been here! */
2162
2163 if (msg != NULL)
2164 printf("%s", msg);
2165 printf("\n%s: stopped in %s\n", progname, curdir);
2166
2167 /* we generally want to keep quiet if a sub-make died */
2168 if (shouldDieQuietly(gn, -1))
2169 return;
2170
2171 if (gn != NULL)
2172 SetErrorVars(gn);
2173
2174 {
2175 char *errorVarsValues;
2176 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
2177 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues);
2178 /* TODO: handle errors */
2179 printf("%s", errorVarsValues);
2180 free(errorVarsValues);
2181 }
2182
2183 fflush(stdout);
2184
2185 /*
2186 * Finally, see if there is a .ERROR target, and run it if so.
2187 */
2188 errorNode = Targ_FindNode(".ERROR");
2189 if (errorNode != NULL) {
2190 errorNode->type |= OP_SPECIAL;
2191 Compat_Make(errorNode, errorNode);
2192 }
2193 }
2194
2195 void
Main_ExportMAKEFLAGS(bool first)2196 Main_ExportMAKEFLAGS(bool first)
2197 {
2198 static bool once = true;
2199 const char *expr;
2200 char *s;
2201
2202 if (once != first)
2203 return;
2204 once = false;
2205
2206 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}";
2207 (void)Var_Subst(expr, SCOPE_CMDLINE, VARE_WANTRES, &s);
2208 /* TODO: handle errors */
2209 if (s[0] != '\0') {
2210 #ifdef POSIX
2211 setenv("MAKEFLAGS", s, 1);
2212 #else
2213 setenv("MAKE", s, 1);
2214 #endif
2215 }
2216 }
2217
2218 char *
getTmpdir(void)2219 getTmpdir(void)
2220 {
2221 static char *tmpdir = NULL;
2222 struct stat st;
2223
2224 if (tmpdir != NULL)
2225 return tmpdir;
2226
2227 /* Honor $TMPDIR but only if it is valid. Ensure it ends with '/'. */
2228 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/",
2229 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir);
2230 /* TODO: handle errors */
2231
2232 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2233 free(tmpdir);
2234 tmpdir = bmake_strdup(_PATH_TMP);
2235 }
2236 return tmpdir;
2237 }
2238
2239 /*
2240 * Create and open a temp file using "pattern".
2241 * If out_fname is provided, set it to a copy of the filename created.
2242 * Otherwise unlink the file once open.
2243 */
2244 int
mkTempFile(const char * pattern,char * tfile,size_t tfile_sz)2245 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz)
2246 {
2247 static char *tmpdir = NULL;
2248 char tbuf[MAXPATHLEN];
2249 int fd;
2250
2251 if (pattern == NULL)
2252 pattern = TMPPAT;
2253 if (tmpdir == NULL)
2254 tmpdir = getTmpdir();
2255 if (tfile == NULL) {
2256 tfile = tbuf;
2257 tfile_sz = sizeof tbuf;
2258 }
2259 if (pattern[0] == '/') {
2260 snprintf(tfile, tfile_sz, "%s", pattern);
2261 } else {
2262 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern);
2263 }
2264 if ((fd = mkstemp(tfile)) < 0)
2265 Punt("Could not create temporary file %s: %s", tfile,
2266 strerror(errno));
2267 if (tfile == tbuf) {
2268 unlink(tfile); /* we just want the descriptor */
2269 }
2270 return fd;
2271 }
2272
2273 /*
2274 * Convert a string representation of a boolean into a boolean value.
2275 * Anything that looks like "No", "False", "Off", "0" etc. is false,
2276 * the empty string is the fallback, everything else is true.
2277 */
2278 bool
ParseBoolean(const char * s,bool fallback)2279 ParseBoolean(const char *s, bool fallback)
2280 {
2281 char ch = ch_tolower(s[0]);
2282 if (ch == '\0')
2283 return fallback;
2284 if (ch == '0' || ch == 'f' || ch == 'n')
2285 return false;
2286 if (ch == 'o')
2287 return ch_tolower(s[1]) != 'f';
2288 return true;
2289 }
2290