1 /* $NetBSD: main.c,v 1.616 2024/05/19 17:55:54 sjg Exp $ */
2
3 /*
4 * Copyright (c) 1988, 1989, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Adam de Boor.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 /*
36 * Copyright (c) 1989 by Berkeley Softworks
37 * All rights reserved.
38 *
39 * This code is derived from software contributed to Berkeley by
40 * Adam de Boor.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. All advertising materials mentioning features or use of this software
51 * must display the following acknowledgement:
52 * This product includes software developed by the University of
53 * California, Berkeley and its contributors.
54 * 4. Neither the name of the University nor the names of its contributors
55 * may be used to endorse or promote products derived from this software
56 * without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * SUCH DAMAGE.
69 */
70
71 /*
72 * The main file for this entire program. Exit routines etc. reside here.
73 *
74 * Utility functions defined in this file:
75 *
76 * Main_ParseArgLine
77 * Parse and process command line arguments from a
78 * single string. Used to implement the special targets
79 * .MFLAGS and .MAKEFLAGS.
80 *
81 * Error Print a tagged error message.
82 *
83 * Fatal Print an error message and exit.
84 *
85 * Punt Abort all jobs and exit with a message.
86 *
87 * Finish Finish things up by printing the number of errors
88 * that occurred, and exit.
89 */
90
91 #include <sys/types.h>
92 #include <sys/time.h>
93 #include <sys/param.h>
94 #include <sys/resource.h>
95 #include <sys/stat.h>
96 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL)
97 #include <sys/sysctl.h>
98 #endif
99 #include <sys/utsname.h>
100 #include "wait.h"
101
102 #include <errno.h>
103 #include <signal.h>
104 #include <stdarg.h>
105 #include <time.h>
106
107 #include "make.h"
108 #include "dir.h"
109 #include "job.h"
110 #include "pathnames.h"
111 #include "trace.h"
112
113 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */
114 MAKE_RCSID("$NetBSD: main.c,v 1.616 2024/05/19 17:55:54 sjg Exp $");
115 #if defined(MAKE_NATIVE)
116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 "
117 "The Regents of the University of California. "
118 "All rights reserved.");
119 #endif
120
121 #ifndef __arraycount
122 # define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
123 #endif
124
125 CmdOpts opts;
126 time_t now; /* Time at start of make */
127 GNode *defaultNode; /* .DEFAULT node */
128 bool allPrecious; /* .PRECIOUS given on a line by itself */
129 bool deleteOnError; /* .DELETE_ON_ERROR: set */
130
131 static int maxJobTokens; /* -j argument */
132 static bool enterFlagObj; /* -w and objdir != srcdir */
133
134 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */
135 bool doing_depend; /* Set while reading .depend */
136 static bool jobsRunning; /* true if the jobs might be running */
137 static const char *tracefile;
138 static bool ReadMakefile(const char *);
139 static void purge_relative_cached_realpaths(void);
140
141 static bool ignorePWD; /* if we use -C, PWD is meaningless */
142 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */
143 char curdir[MAXPATHLEN + 1]; /* Startup directory */
144 const char *progname;
145 char *makeDependfile;
146 pid_t myPid;
147 int makelevel;
148
149 bool forceJobs = false;
150 static int main_errors = 0;
151 static HashTable cached_realpaths;
152
153 /*
154 * For compatibility with the POSIX version of MAKEFLAGS that includes
155 * all the options without '-', convert 'flags' to '-f -l -a -g -s '.
156 */
157 static char *
explode(const char * flags)158 explode(const char *flags)
159 {
160 char *exploded, *ep;
161 const char *p;
162
163 if (flags == NULL)
164 return NULL;
165
166 for (p = flags; *p != '\0'; p++)
167 if (!ch_isalpha(*p))
168 return bmake_strdup(flags);
169
170 exploded = bmake_malloc((size_t)(p - flags) * 3 + 1);
171 for (p = flags, ep = exploded; *p != '\0'; p++) {
172 *ep++ = '-';
173 *ep++ = *p;
174 *ep++ = ' ';
175 }
176 *ep = '\0';
177 return exploded;
178 }
179
180 MAKE_ATTR_DEAD static void
usage(void)181 usage(void)
182 {
183 size_t prognameLen = strcspn(progname, "[");
184
185 (void)fprintf(stderr,
186 "usage: %.*s [-BeikNnqrSstWwX]\n"
187 " [-C directory] [-D variable] [-d flags] [-f makefile]\n"
188 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n"
189 " [-V variable] [-v variable] [variable=value] [target ...]\n",
190 (int)prognameLen, progname);
191 exit(2);
192 }
193
194 static void
MainParseArgDebugFile(const char * arg)195 MainParseArgDebugFile(const char *arg)
196 {
197 const char *mode;
198 size_t len;
199 char *fname;
200
201 if (opts.debug_file != stdout && opts.debug_file != stderr)
202 fclose(opts.debug_file);
203
204 if (*arg == '+') {
205 arg++;
206 mode = "a";
207 } else
208 mode = "w";
209
210 if (strcmp(arg, "stdout") == 0) {
211 opts.debug_file = stdout;
212 return;
213 }
214 if (strcmp(arg, "stderr") == 0) {
215 opts.debug_file = stderr;
216 return;
217 }
218
219 len = strlen(arg);
220 fname = bmake_malloc(len + 20);
221 memcpy(fname, arg, len + 1);
222
223 /* Replace the trailing '%d' after '.%d' with the pid. */
224 if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0)
225 snprintf(fname + len - 2, 20, "%d", getpid());
226
227 opts.debug_file = fopen(fname, mode);
228 if (opts.debug_file == NULL) {
229 fprintf(stderr, "Cannot open debug file \"%s\"\n", fname);
230 exit(2);
231 }
232 free(fname);
233 }
234
235 static void
MainParseArgDebug(const char * argvalue)236 MainParseArgDebug(const char *argvalue)
237 {
238 const char *modules;
239 DebugFlags debug = opts.debug;
240
241 for (modules = argvalue; *modules != '\0'; modules++) {
242 switch (*modules) {
243 case '0': /* undocumented, only intended for tests */
244 memset(&debug, 0, sizeof(debug));
245 break;
246 case 'A':
247 memset(&debug, ~0, sizeof(debug));
248 break;
249 case 'a':
250 debug.DEBUG_ARCH = true;
251 break;
252 case 'C':
253 debug.DEBUG_CWD = true;
254 break;
255 case 'c':
256 debug.DEBUG_COND = true;
257 break;
258 case 'd':
259 debug.DEBUG_DIR = true;
260 break;
261 case 'e':
262 debug.DEBUG_ERROR = true;
263 break;
264 case 'f':
265 debug.DEBUG_FOR = true;
266 break;
267 case 'g':
268 if (modules[1] == '1') {
269 debug.DEBUG_GRAPH1 = true;
270 modules++;
271 } else if (modules[1] == '2') {
272 debug.DEBUG_GRAPH2 = true;
273 modules++;
274 } else if (modules[1] == '3') {
275 debug.DEBUG_GRAPH3 = true;
276 modules++;
277 }
278 break;
279 case 'h':
280 debug.DEBUG_HASH = true;
281 break;
282 case 'j':
283 debug.DEBUG_JOB = true;
284 break;
285 case 'L':
286 opts.strict = true;
287 break;
288 case 'l':
289 debug.DEBUG_LOUD = true;
290 break;
291 case 'M':
292 debug.DEBUG_META = true;
293 break;
294 case 'm':
295 debug.DEBUG_MAKE = true;
296 break;
297 case 'n':
298 debug.DEBUG_SCRIPT = true;
299 break;
300 case 'p':
301 debug.DEBUG_PARSE = true;
302 break;
303 case 's':
304 debug.DEBUG_SUFF = true;
305 break;
306 case 't':
307 debug.DEBUG_TARG = true;
308 break;
309 case 'V':
310 opts.debugVflag = true;
311 break;
312 case 'v':
313 debug.DEBUG_VAR = true;
314 break;
315 case 'x':
316 debug.DEBUG_SHELL = true;
317 break;
318 case 'F':
319 MainParseArgDebugFile(modules + 1);
320 goto finish;
321 default:
322 (void)fprintf(stderr,
323 "%s: illegal argument to d option -- %c\n",
324 progname, *modules);
325 usage();
326 }
327 }
328
329 finish:
330 opts.debug = debug;
331
332 setvbuf(opts.debug_file, NULL, _IONBF, 0);
333 if (opts.debug_file != stdout)
334 setvbuf(stdout, NULL, _IOLBF, 0);
335 }
336
337 /* Is path relative or does it contain any relative component "." or ".."? */
338 static bool
IsRelativePath(const char * path)339 IsRelativePath(const char *path)
340 {
341 const char *p;
342
343 if (path[0] != '/')
344 return true;
345 p = path;
346 while ((p = strstr(p, "/.")) != NULL) {
347 p += 2;
348 if (*p == '.')
349 p++;
350 if (*p == '/' || *p == '\0')
351 return true;
352 }
353 return false;
354 }
355
356 static void
MainParseArgChdir(const char * argvalue)357 MainParseArgChdir(const char *argvalue)
358 {
359 struct stat sa, sb;
360
361 if (chdir(argvalue) == -1) {
362 (void)fprintf(stderr, "%s: chdir %s: %s\n",
363 progname, argvalue, strerror(errno));
364 exit(2); /* Not 1 so -q can distinguish error */
365 }
366 if (getcwd(curdir, MAXPATHLEN) == NULL) {
367 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
368 exit(2);
369 }
370 if (!IsRelativePath(argvalue) &&
371 stat(argvalue, &sa) != -1 &&
372 stat(curdir, &sb) != -1 &&
373 sa.st_ino == sb.st_ino &&
374 sa.st_dev == sb.st_dev)
375 strncpy(curdir, argvalue, MAXPATHLEN);
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 return false;
747 }
748
749 snprintf(objdir, sizeof objdir, "%s", path);
750 Global_Set(".OBJDIR", objdir);
751 setenv("PWD", objdir, 1);
752 Dir_InitDot();
753 purge_relative_cached_realpaths();
754 if (opts.enterFlag && strcmp(objdir, curdir) != 0)
755 enterFlagObj = true;
756 return true;
757 }
758
759 static bool
SetVarObjdir(bool writable,const char * var,const char * suffix)760 SetVarObjdir(bool writable, const char *var, const char *suffix)
761 {
762 FStr path = Var_Value(SCOPE_CMDLINE, var);
763
764 if (path.str == NULL || path.str[0] == '\0') {
765 FStr_Done(&path);
766 return false;
767 }
768
769 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES);
770
771 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix);
772
773 FStr_Done(&path);
774 return true;
775 }
776
777 /*
778 * Splits str into words (in-place, modifying it), adding them to the list.
779 * The string must be kept alive as long as the list.
780 */
781 void
AppendWords(StringList * lp,char * str)782 AppendWords(StringList *lp, char *str)
783 {
784 char *p;
785 const char *sep = " \t";
786
787 for (p = strtok(str, sep); p != NULL; p = strtok(NULL, sep))
788 Lst_Append(lp, p);
789 }
790
791 #ifdef SIGINFO
792 /*ARGSUSED*/
793 static void
siginfo(int signo MAKE_ATTR_UNUSED)794 siginfo(int signo MAKE_ATTR_UNUSED)
795 {
796 char dir[MAXPATHLEN];
797 char str[2 * MAXPATHLEN];
798 int len;
799 if (getcwd(dir, sizeof dir) == NULL)
800 return;
801 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir);
802 if (len > 0)
803 (void)write(STDERR_FILENO, str, (size_t)len);
804 }
805 #endif
806
807 /* Allow makefiles some control over the mode we run in. */
808 static void
MakeMode(void)809 MakeMode(void)
810 {
811 char *mode = Var_Subst("${.MAKE.MODE:tl}",
812 SCOPE_GLOBAL, VARE_WANTRES);
813 /* TODO: handle errors */
814
815 if (mode[0] != '\0') {
816 if (strstr(mode, "compat") != NULL) {
817 opts.compatMake = true;
818 forceJobs = false;
819 }
820 #if USE_META
821 if (strstr(mode, "meta") != NULL)
822 meta_mode_init(mode);
823 #endif
824 if (strstr(mode, "randomize-targets") != NULL)
825 opts.randomizeTargets = true;
826 }
827
828 free(mode);
829 }
830
831 static void
PrintVar(const char * varname,bool expandVars)832 PrintVar(const char *varname, bool expandVars)
833 {
834 if (strchr(varname, '$') != NULL) {
835 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES);
836 /* TODO: handle errors */
837 printf("%s\n", evalue);
838 free(evalue);
839
840 } else if (expandVars) {
841 char *expr = str_concat3("${", varname, "}");
842 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES);
843 /* TODO: handle errors */
844 free(expr);
845 printf("%s\n", evalue);
846 free(evalue);
847
848 } else {
849 FStr value = Var_Value(SCOPE_GLOBAL, varname);
850 printf("%s\n", value.str != NULL ? value.str : "");
851 FStr_Done(&value);
852 }
853 }
854
855 /*
856 * Return a bool based on a variable.
857 *
858 * If the knob is not set, return the fallback.
859 * If set, anything that looks or smells like "No", "False", "Off", "0", etc.
860 * is false, otherwise true.
861 */
862 bool
GetBooleanExpr(const char * expr,bool fallback)863 GetBooleanExpr(const char *expr, bool fallback)
864 {
865 char *value;
866 bool res;
867
868 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES);
869 /* TODO: handle errors */
870 res = ParseBoolean(value, fallback);
871 free(value);
872 return res;
873 }
874
875 static void
doPrintVars(void)876 doPrintVars(void)
877 {
878 StringListNode *ln;
879 bool expandVars;
880
881 if (opts.printVars == PVM_EXPANDED)
882 expandVars = true;
883 else if (opts.debugVflag)
884 expandVars = false;
885 else
886 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}",
887 false);
888
889 for (ln = opts.variables.first; ln != NULL; ln = ln->next) {
890 const char *varname = ln->datum;
891 PrintVar(varname, expandVars);
892 }
893 }
894
895 static bool
runTargets(void)896 runTargets(void)
897 {
898 GNodeList targs = LST_INIT; /* target nodes to create */
899 bool outOfDate; /* false if all targets up to date */
900
901 /*
902 * Have now read the entire graph and need to make a list of
903 * targets to create. If none was given on the command line,
904 * we consult the parsing module to find the main target(s)
905 * to create.
906 */
907 if (Lst_IsEmpty(&opts.create))
908 Parse_MainName(&targs);
909 else
910 Targ_FindList(&targs, &opts.create);
911
912 if (!opts.compatMake) {
913 /*
914 * Initialize job module before traversing the graph
915 * now that any .BEGIN and .END targets have been read.
916 * This is done only if the -q flag wasn't given
917 * (to prevent the .BEGIN from being executed should
918 * it exist).
919 */
920 if (!opts.query) {
921 Job_Init();
922 jobsRunning = true;
923 }
924
925 /* Traverse the graph, checking on all the targets */
926 outOfDate = Make_Run(&targs);
927 } else {
928 Compat_MakeAll(&targs);
929 outOfDate = false;
930 }
931 Lst_Done(&targs); /* Don't free the targets themselves. */
932 return outOfDate;
933 }
934
935 /*
936 * Set up the .TARGETS variable to contain the list of targets to be created.
937 * If none specified, make the variable empty for now, the parser will fill
938 * in the default or .MAIN target later.
939 */
940 static void
InitVarTargets(void)941 InitVarTargets(void)
942 {
943 StringListNode *ln;
944
945 if (Lst_IsEmpty(&opts.create)) {
946 Global_Set(".TARGETS", "");
947 return;
948 }
949
950 for (ln = opts.create.first; ln != NULL; ln = ln->next) {
951 const char *name = ln->datum;
952 Global_Append(".TARGETS", name);
953 }
954 }
955
956 static void
InitRandom(void)957 InitRandom(void)
958 {
959 struct timeval tv;
960
961 gettimeofday(&tv, NULL);
962 srandom((unsigned int)(tv.tv_sec + tv.tv_usec));
963 }
964
965 static const char *
InitVarMachine(const struct utsname * utsname MAKE_ATTR_UNUSED)966 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED)
967 {
968 #ifdef FORCE_MACHINE
969 return FORCE_MACHINE;
970 #else
971 const char *machine = getenv("MACHINE");
972
973 if (machine != NULL)
974 return machine;
975
976 #if defined(MAKE_NATIVE)
977 return utsname->machine;
978 #elif defined(MAKE_MACHINE)
979 return MAKE_MACHINE;
980 #else
981 return "unknown";
982 #endif
983 #endif
984 }
985
986 static const char *
InitVarMachineArch(void)987 InitVarMachineArch(void)
988 {
989 #ifdef FORCE_MACHINE_ARCH
990 return FORCE_MACHINE_ARCH;
991 #else
992 const char *env = getenv("MACHINE_ARCH");
993 if (env != NULL)
994 return env;
995
996 #if defined(MAKE_NATIVE) && defined(CTL_HW)
997 {
998 struct utsname utsname;
999 static char machine_arch_buf[sizeof utsname.machine];
1000 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
1001 size_t len = sizeof machine_arch_buf;
1002
1003 if (sysctl(mib, (unsigned int)__arraycount(mib),
1004 machine_arch_buf, &len, NULL, 0) < 0) {
1005 (void)fprintf(stderr, "%s: sysctl failed (%s).\n",
1006 progname, strerror(errno));
1007 exit(2);
1008 }
1009
1010 return machine_arch_buf;
1011 }
1012 #elif defined(MACHINE_ARCH)
1013 return MACHINE_ARCH;
1014 #elif defined(MAKE_MACHINE_ARCH)
1015 return MAKE_MACHINE_ARCH;
1016 #else
1017 return "unknown";
1018 #endif
1019 #endif
1020 }
1021
1022 #ifndef NO_PWD_OVERRIDE
1023 /*
1024 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1025 * since the value of curdir can vary depending on how we got
1026 * here. That is, sitting at a shell prompt (shell that provides $PWD)
1027 * or via subdir.mk, in which case it's likely a shell which does
1028 * not provide it.
1029 *
1030 * So, to stop it breaking this case only, we ignore PWD if
1031 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression.
1032 */
1033 static void
HandlePWD(const struct stat * curdir_st)1034 HandlePWD(const struct stat *curdir_st)
1035 {
1036 char *pwd;
1037 FStr makeobjdir;
1038 struct stat pwd_st;
1039
1040 if (ignorePWD || (pwd = getenv("PWD")) == NULL)
1041 return;
1042
1043 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"))
1044 return;
1045
1046 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR");
1047 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL)
1048 goto ignore_pwd;
1049
1050 if (stat(pwd, &pwd_st) == 0 &&
1051 curdir_st->st_ino == pwd_st.st_ino &&
1052 curdir_st->st_dev == pwd_st.st_dev)
1053 (void)strncpy(curdir, pwd, MAXPATHLEN);
1054
1055 ignore_pwd:
1056 FStr_Done(&makeobjdir);
1057 }
1058 #endif
1059
1060 /*
1061 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set
1062 * in the environment, try only that value and fall back to .CURDIR if it
1063 * does not exist.
1064 *
1065 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
1066 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these
1067 * paths exist, just use .CURDIR.
1068 */
1069 static void
InitObjdir(const char * machine,const char * machine_arch)1070 InitObjdir(const char *machine, const char *machine_arch)
1071 {
1072 bool writable;
1073
1074 Dir_InitCur(curdir);
1075 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true);
1076 (void)Main_SetObjdir(false, "%s", curdir);
1077
1078 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) &&
1079 !SetVarObjdir(writable, "MAKEOBJDIR", "") &&
1080 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
1081 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) &&
1082 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR))
1083 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir);
1084 }
1085
1086 /* get rid of resource limit on file descriptors */
1087 static void
UnlimitFiles(void)1088 UnlimitFiles(void)
1089 {
1090 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
1091 struct rlimit rl;
1092 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
1093 rl.rlim_cur != rl.rlim_max) {
1094 #ifdef BMAKE_NOFILE_MAX
1095 if (BMAKE_NOFILE_MAX < rl.rlim_max)
1096 rl.rlim_cur = BMAKE_NOFILE_MAX;
1097 else
1098 #endif
1099 rl.rlim_cur = rl.rlim_max;
1100 (void)setrlimit(RLIMIT_NOFILE, &rl);
1101 }
1102 #endif
1103 }
1104
1105 static void
CmdOpts_Init(void)1106 CmdOpts_Init(void)
1107 {
1108 opts.compatMake = false;
1109 memset(&opts.debug, 0, sizeof(opts.debug));
1110 /* opts.debug_file has already been initialized earlier */
1111 opts.strict = false;
1112 opts.debugVflag = false;
1113 opts.checkEnvFirst = false;
1114 Lst_Init(&opts.makefiles);
1115 opts.ignoreErrors = false; /* Pay attention to non-zero returns */
1116 opts.maxJobs = 1;
1117 opts.keepgoing = false; /* Stop on error */
1118 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */
1119 opts.noExecute = false; /* Execute all commands */
1120 opts.query = false;
1121 opts.noBuiltins = false; /* Read the built-in rules */
1122 opts.silent = false; /* Print commands as executed */
1123 opts.touch = false;
1124 opts.printVars = PVM_NONE;
1125 Lst_Init(&opts.variables);
1126 opts.parseWarnFatal = false;
1127 opts.enterFlag = false;
1128 opts.varNoExportEnv = false;
1129 Lst_Init(&opts.create);
1130 }
1131
1132 /*
1133 * Initialize MAKE and .MAKE to the path of the executable, so that it can be
1134 * found by execvp(3) and the shells, even after a chdir.
1135 *
1136 * If it's a relative path and contains a '/', resolve it to an absolute path.
1137 * Otherwise keep it as is, assuming it will be found in the PATH.
1138 */
1139 static void
InitVarMake(const char * argv0)1140 InitVarMake(const char *argv0)
1141 {
1142 const char *make = argv0;
1143
1144 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) {
1145 char pathbuf[MAXPATHLEN];
1146 const char *abspath = cached_realpath(argv0, pathbuf);
1147 struct stat st;
1148 if (abspath != NULL && abspath[0] == '/' &&
1149 stat(make, &st) == 0)
1150 make = abspath;
1151 }
1152
1153 Global_Set("MAKE", make);
1154 Global_Set(".MAKE", make);
1155 }
1156
1157 /*
1158 * Add the directories from the colon-separated syspath to defSysIncPath.
1159 * After returning, the contents of syspath is unspecified.
1160 */
1161 static void
InitDefSysIncPath(char * syspath)1162 InitDefSysIncPath(char *syspath)
1163 {
1164 static char defsyspath[] = _PATH_DEFSYSPATH;
1165 char *start, *p;
1166
1167 /*
1168 * If no user-supplied system path was given (through the -m option)
1169 * add the directories from the DEFSYSPATH (more than one may be given
1170 * as dir1:...:dirn) to the system include path.
1171 */
1172 if (syspath == NULL || syspath[0] == '\0')
1173 syspath = defsyspath;
1174 else
1175 syspath = bmake_strdup(syspath);
1176
1177 for (start = syspath; *start != '\0'; start = p) {
1178 for (p = start; *p != '\0' && *p != ':'; p++)
1179 continue;
1180 if (*p == ':')
1181 *p++ = '\0';
1182
1183 /* look for magic parent directory search string */
1184 if (strncmp(start, ".../", 4) == 0) {
1185 char *dir = Dir_FindHereOrAbove(curdir, start + 4);
1186 if (dir != NULL) {
1187 (void)SearchPath_Add(defSysIncPath, dir);
1188 free(dir);
1189 }
1190 } else {
1191 (void)SearchPath_Add(defSysIncPath, start);
1192 }
1193 }
1194
1195 if (syspath != defsyspath)
1196 free(syspath);
1197 }
1198
1199 static void
ReadBuiltinRules(void)1200 ReadBuiltinRules(void)
1201 {
1202 StringListNode *ln;
1203 StringList sysMkFiles = LST_INIT;
1204
1205 SearchPath_Expand(
1206 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath,
1207 _PATH_DEFSYSMK,
1208 &sysMkFiles);
1209 if (Lst_IsEmpty(&sysMkFiles))
1210 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK);
1211
1212 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next)
1213 if (ReadMakefile(ln->datum))
1214 break;
1215
1216 if (ln == NULL)
1217 Fatal("%s: cannot open %s.",
1218 progname, (const char *)sysMkFiles.first->datum);
1219
1220 Lst_DoneFree(&sysMkFiles);
1221 }
1222
1223 static void
InitMaxJobs(void)1224 InitMaxJobs(void)
1225 {
1226 char *value;
1227 int n;
1228
1229 if (forceJobs || opts.compatMake ||
1230 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS"))
1231 return;
1232
1233 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES);
1234 /* TODO: handle errors */
1235 n = (int)strtol(value, NULL, 0);
1236 if (n < 1) {
1237 (void)fprintf(stderr,
1238 "%s: illegal value for .MAKE.JOBS "
1239 "-- must be positive integer!\n",
1240 progname);
1241 exit(2); /* Not 1 so -q can distinguish error */
1242 }
1243
1244 if (n != opts.maxJobs) {
1245 Global_Append(MAKEFLAGS, "-j");
1246 Global_Append(MAKEFLAGS, value);
1247 }
1248
1249 opts.maxJobs = n;
1250 maxJobTokens = opts.maxJobs;
1251 forceJobs = true;
1252 free(value);
1253 }
1254
1255 /*
1256 * For compatibility, look at the directories in the VPATH variable
1257 * and add them to the search path, if the variable is defined. The
1258 * variable's value is in the same format as the PATH environment
1259 * variable, i.e. <directory>:<directory>:<directory>...
1260 */
1261 static void
InitVpath(void)1262 InitVpath(void)
1263 {
1264 char *vpath, savec, *path;
1265 if (!Var_Exists(SCOPE_CMDLINE, "VPATH"))
1266 return;
1267
1268 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES);
1269 /* TODO: handle errors */
1270 path = vpath;
1271 do {
1272 char *p;
1273 /* skip to end of directory */
1274 for (p = path; *p != ':' && *p != '\0'; p++)
1275 continue;
1276 /* Save terminator character so know when to stop */
1277 savec = *p;
1278 *p = '\0';
1279 /* Add directory to search path */
1280 (void)SearchPath_Add(&dirSearchPath, path);
1281 *p = savec;
1282 path = p + 1;
1283 } while (savec == ':');
1284 free(vpath);
1285 }
1286
1287 static void
ReadAllMakefiles(const StringList * makefiles)1288 ReadAllMakefiles(const StringList *makefiles)
1289 {
1290 StringListNode *ln;
1291
1292 for (ln = makefiles->first; ln != NULL; ln = ln->next) {
1293 const char *fname = ln->datum;
1294 if (!ReadMakefile(fname))
1295 Fatal("%s: cannot open %s.", progname, fname);
1296 }
1297 }
1298
1299 static void
ReadFirstDefaultMakefile(void)1300 ReadFirstDefaultMakefile(void)
1301 {
1302 StringList makefiles = LST_INIT;
1303 StringListNode *ln;
1304 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}",
1305 SCOPE_CMDLINE, VARE_WANTRES);
1306 /* TODO: handle errors */
1307
1308 AppendWords(&makefiles, prefs);
1309
1310 for (ln = makefiles.first; ln != NULL; ln = ln->next)
1311 if (ReadMakefile(ln->datum))
1312 break;
1313
1314 Lst_Done(&makefiles);
1315 free(prefs);
1316 }
1317
1318 /*
1319 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS.
1320 * Initialize a few modules.
1321 * Parse the arguments from MAKEFLAGS and the command line.
1322 */
1323 static void
main_Init(int argc,char ** argv)1324 main_Init(int argc, char **argv)
1325 {
1326 struct stat sa;
1327 const char *machine;
1328 const char *machine_arch;
1329 char *syspath = getenv("MAKESYSPATH");
1330 struct utsname utsname;
1331
1332 /* default to writing debug to stderr */
1333 opts.debug_file = stderr;
1334
1335 Str_Intern_Init();
1336 HashTable_Init(&cached_realpaths);
1337
1338 #ifdef SIGINFO
1339 (void)bmake_signal(SIGINFO, siginfo);
1340 #endif
1341
1342 InitRandom();
1343
1344 progname = str_basename(argv[0]);
1345
1346 UnlimitFiles();
1347
1348 if (uname(&utsname) == -1) {
1349 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
1350 strerror(errno));
1351 exit(2);
1352 }
1353
1354 machine = InitVarMachine(&utsname);
1355 machine_arch = InitVarMachineArch();
1356
1357 myPid = getpid(); /* remember this for vFork() */
1358
1359 /* Just in case MAKEOBJDIR wants us to do something tricky. */
1360 Targ_Init();
1361 Var_Init();
1362 #ifdef FORCE_MAKE_OS
1363 Global_Set_ReadOnly(".MAKE.OS", FORCE_MAKE_OS);
1364 #else
1365 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname);
1366 #endif
1367 Global_Set("MACHINE", machine);
1368 Global_Set("MACHINE_ARCH", machine_arch);
1369 #ifdef MAKE_VERSION
1370 Global_Set("MAKE_VERSION", MAKE_VERSION);
1371 #endif
1372 Global_Set_ReadOnly(".newline", "\n");
1373 #ifndef MAKEFILE_PREFERENCE_LIST
1374 /* This is the traditional preference for makefiles. */
1375 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
1376 #endif
1377 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST);
1378 Global_Set(".MAKE.DEPENDFILE", ".depend");
1379 /* Tell makefiles like jobs.mk whether we support -jC */
1380 #ifdef _SC_NPROCESSORS_ONLN
1381 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes");
1382 #else
1383 Global_Set_ReadOnly(".MAKE.JOBS.C", "no");
1384 #endif
1385
1386 CmdOpts_Init();
1387 allPrecious = false; /* Remove targets when interrupted */
1388 deleteOnError = false; /* Historical default behavior */
1389 jobsRunning = false;
1390
1391 maxJobTokens = opts.maxJobs;
1392 ignorePWD = false;
1393
1394 /*
1395 * Initialize the parsing, directory and variable modules to prepare
1396 * for the reading of inclusion paths and variable settings on the
1397 * command line
1398 */
1399
1400 /*
1401 * Initialize various variables.
1402 * MAKE also gets this name, for compatibility
1403 * .MAKEFLAGS gets set to the empty string just in case.
1404 * MFLAGS also gets initialized empty, for compatibility.
1405 */
1406 Parse_Init();
1407 InitVarMake(argv[0]);
1408 Global_Set(MAKEFLAGS, "");
1409 Global_Set(".MAKEOVERRIDES", "");
1410 Global_Set("MFLAGS", "");
1411 Global_Set(".ALLTARGETS", "");
1412 Global_Set_ReadOnly(".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV);
1413
1414 /* Set some other useful variables. */
1415 {
1416 char buf[64], *ep = getenv(MAKE_LEVEL_ENV);
1417
1418 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0;
1419 if (makelevel < 0)
1420 makelevel = 0;
1421 snprintf(buf, sizeof buf, "%d", makelevel);
1422 Global_Set(".MAKE.LEVEL", buf);
1423 snprintf(buf, sizeof buf, "%u", myPid);
1424 Global_Set_ReadOnly(".MAKE.PID", buf);
1425 snprintf(buf, sizeof buf, "%u", getppid());
1426 Global_Set_ReadOnly(".MAKE.PPID", buf);
1427 snprintf(buf, sizeof buf, "%u", getuid());
1428 Global_Set_ReadOnly(".MAKE.UID", buf);
1429 snprintf(buf, sizeof buf, "%u", getgid());
1430 Global_Set_ReadOnly(".MAKE.GID", buf);
1431 }
1432 if (makelevel > 0) {
1433 char pn[1024];
1434 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel);
1435 progname = bmake_strdup(pn);
1436 }
1437
1438 #ifdef USE_META
1439 meta_init();
1440 #endif
1441 Dir_Init();
1442
1443 {
1444 char *makeflags = explode(getenv("MAKEFLAGS"));
1445 Main_ParseArgLine(makeflags);
1446 free(makeflags);
1447 }
1448
1449 if (getcwd(curdir, MAXPATHLEN) == NULL) {
1450 (void)fprintf(stderr, "%s: getcwd: %s.\n",
1451 progname, strerror(errno));
1452 exit(2);
1453 }
1454
1455 MainParseArgs(argc, argv);
1456
1457 if (opts.enterFlag)
1458 printf("%s: Entering directory `%s'\n", progname, curdir);
1459
1460 if (stat(curdir, &sa) == -1) {
1461 (void)fprintf(stderr, "%s: %s: %s.\n",
1462 progname, curdir, strerror(errno));
1463 exit(2);
1464 }
1465
1466 #ifndef NO_PWD_OVERRIDE
1467 HandlePWD(&sa);
1468 #endif
1469 Global_Set(".CURDIR", curdir);
1470
1471 InitObjdir(machine, machine_arch);
1472
1473 Arch_Init();
1474 Suff_Init();
1475 Trace_Init(tracefile);
1476
1477 defaultNode = NULL;
1478 (void)time(&now);
1479
1480 Trace_Log(MAKESTART, NULL);
1481
1482 InitVarTargets();
1483
1484 InitDefSysIncPath(syspath);
1485 }
1486
1487 /*
1488 * Read the system makefile followed by either makefile, Makefile or the
1489 * files given by the -f option. Exit on parse errors.
1490 */
1491 static void
main_ReadFiles(void)1492 main_ReadFiles(void)
1493 {
1494
1495 if (Lst_IsEmpty(&sysIncPath->dirs))
1496 SearchPath_AddAll(sysIncPath, defSysIncPath);
1497
1498 Dir_SetSYSPATH();
1499 if (!opts.noBuiltins)
1500 ReadBuiltinRules();
1501
1502 posix_state = PS_MAYBE_NEXT_LINE;
1503 if (!Lst_IsEmpty(&opts.makefiles))
1504 ReadAllMakefiles(&opts.makefiles);
1505 else
1506 ReadFirstDefaultMakefile();
1507 }
1508
1509 /* Compute the dependency graph. */
1510 static void
main_PrepareMaking(void)1511 main_PrepareMaking(void)
1512 {
1513 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1514 if (!opts.noBuiltins || opts.printVars == PVM_NONE) {
1515 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}",
1516 SCOPE_CMDLINE, VARE_WANTRES);
1517 if (makeDependfile[0] != '\0') {
1518 /* TODO: handle errors */
1519 doing_depend = true;
1520 (void)ReadMakefile(makeDependfile);
1521 doing_depend = false;
1522 }
1523 }
1524
1525 if (enterFlagObj)
1526 printf("%s: Entering directory `%s'\n", progname, objdir);
1527
1528 MakeMode();
1529
1530 {
1531 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS);
1532 Global_Append("MFLAGS", makeflags.str);
1533 FStr_Done(&makeflags);
1534 }
1535
1536 InitMaxJobs();
1537
1538 if (!opts.compatMake && !forceJobs)
1539 opts.compatMake = true;
1540
1541 if (!opts.compatMake)
1542 Job_ServerStart(maxJobTokens, jp_0, jp_1);
1543 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1544 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0);
1545
1546 if (opts.printVars == PVM_NONE)
1547 Main_ExportMAKEFLAGS(true); /* initial export */
1548
1549 InitVpath();
1550
1551 /*
1552 * Now that all search paths have been read for suffixes et al, it's
1553 * time to add the default search path to their lists...
1554 */
1555 Suff_ExtendPaths();
1556
1557 /*
1558 * Propagate attributes through :: dependency lists.
1559 */
1560 Targ_Propagate();
1561
1562 /* print the initial graph, if the user requested it */
1563 if (DEBUG(GRAPH1))
1564 Targ_PrintGraph(1);
1565 }
1566
1567 /*
1568 * Make the targets.
1569 * If the -v or -V options are given, print variables instead.
1570 * Return whether any of the targets is out-of-date.
1571 */
1572 static bool
main_Run(void)1573 main_Run(void)
1574 {
1575 if (opts.printVars != PVM_NONE) {
1576 /* print the values of any variables requested by the user */
1577 doPrintVars();
1578 return false;
1579 } else {
1580 return runTargets();
1581 }
1582 }
1583
1584 /* Clean up after making the targets. */
1585 static void
main_CleanUp(void)1586 main_CleanUp(void)
1587 {
1588 #ifdef CLEANUP
1589 Lst_DoneFree(&opts.variables);
1590 Lst_DoneFree(&opts.makefiles);
1591 Lst_DoneFree(&opts.create);
1592 #endif
1593
1594 if (DEBUG(GRAPH2))
1595 Targ_PrintGraph(2);
1596
1597 Trace_Log(MAKEEND, NULL);
1598
1599 if (enterFlagObj)
1600 printf("%s: Leaving directory `%s'\n", progname, objdir);
1601 if (opts.enterFlag)
1602 printf("%s: Leaving directory `%s'\n", progname, curdir);
1603
1604 #ifdef USE_META
1605 meta_finish();
1606 #endif
1607 Suff_End();
1608 Targ_End();
1609 Arch_End();
1610 Var_End();
1611 Parse_End();
1612 Dir_End();
1613 Job_End();
1614 Trace_End();
1615 Str_Intern_End();
1616 }
1617
1618 /* Determine the exit code. */
1619 static int
main_Exit(bool outOfDate)1620 main_Exit(bool outOfDate)
1621 {
1622 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0))
1623 return 2; /* Not 1 so -q can distinguish error */
1624 return outOfDate ? 1 : 0;
1625 }
1626
1627 int
main(int argc,char ** argv)1628 main(int argc, char **argv)
1629 {
1630 bool outOfDate;
1631
1632 main_Init(argc, argv);
1633 main_ReadFiles();
1634 main_PrepareMaking();
1635 outOfDate = main_Run();
1636 main_CleanUp();
1637 return main_Exit(outOfDate);
1638 }
1639
1640 /*
1641 * Open and parse the given makefile, with all its side effects.
1642 * Return false if the file could not be opened.
1643 */
1644 static bool
ReadMakefile(const char * fname)1645 ReadMakefile(const char *fname)
1646 {
1647 int fd;
1648 char *name, *path = NULL;
1649
1650 if (strcmp(fname, "-") == 0) {
1651 Parse_File("(stdin)", -1);
1652 Var_Set(SCOPE_INTERNAL, "MAKEFILE", "");
1653 } else {
1654 /* if we've chdir'd, rebuild the path name */
1655 if (strcmp(curdir, objdir) != 0 && *fname != '/') {
1656 path = str_concat3(curdir, "/", fname);
1657 fd = open(path, O_RDONLY);
1658 if (fd != -1) {
1659 fname = path;
1660 goto found;
1661 }
1662 free(path);
1663
1664 /* If curdir failed, try objdir (ala .depend) */
1665 path = str_concat3(objdir, "/", fname);
1666 fd = open(path, O_RDONLY);
1667 if (fd != -1) {
1668 fname = path;
1669 goto found;
1670 }
1671 } else {
1672 fd = open(fname, O_RDONLY);
1673 if (fd != -1)
1674 goto found;
1675 }
1676 /* look in -I and system include directories. */
1677 name = Dir_FindFile(fname, parseIncPath);
1678 if (name == NULL) {
1679 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs)
1680 ? defSysIncPath : sysIncPath;
1681 name = Dir_FindFile(fname, sysInc);
1682 }
1683 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) {
1684 free(name);
1685 free(path);
1686 return false;
1687 }
1688 fname = name;
1689 /*
1690 * set the MAKEFILE variable desired by System V fans -- the
1691 * placement of the setting here means it gets set to the last
1692 * makefile specified, as it is set by SysV make.
1693 */
1694 found:
1695 if (!doing_depend)
1696 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname);
1697 Parse_File(fname, fd);
1698 }
1699 free(path);
1700 return true;
1701 }
1702
1703 /*
1704 * Execute the command in cmd, and return its output (only stdout, not
1705 * stderr, possibly empty). In the output, replace newlines with spaces.
1706 */
1707 char *
Cmd_Exec(const char * cmd,char ** error)1708 Cmd_Exec(const char *cmd, char **error)
1709 {
1710 const char *args[4]; /* Arguments for invoking the shell */
1711 int pipefds[2];
1712 int cpid; /* Child PID */
1713 int pid; /* PID from wait() */
1714 int status; /* command exit status */
1715 Buffer buf; /* buffer to store the result */
1716 ssize_t bytes_read;
1717 char *output;
1718 char *p;
1719 int saved_errno;
1720 char cmd_file[MAXPATHLEN];
1721 size_t cmd_len;
1722 int cmd_fd = -1;
1723
1724 if (shellPath == NULL)
1725 Shell_Init();
1726
1727 cmd_len = strlen(cmd);
1728 if (cmd_len > 1000) {
1729 cmd_fd = mkTempFile(NULL, cmd_file, sizeof(cmd_file));
1730 if (cmd_fd >= 0) {
1731 ssize_t n;
1732
1733 n = write(cmd_fd, cmd, cmd_len);
1734 close(cmd_fd);
1735 if (n < (ssize_t)cmd_len) {
1736 unlink(cmd_file);
1737 cmd_fd = -1;
1738 }
1739 }
1740 }
1741
1742 args[0] = shellName;
1743 if (cmd_fd >= 0) {
1744 args[1] = cmd_file;
1745 args[2] = NULL;
1746 } else {
1747 cmd_file[0] = '\0';
1748 args[1] = "-c";
1749 args[2] = cmd;
1750 args[3] = NULL;
1751 }
1752 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd);
1753
1754 if (pipe(pipefds) == -1) {
1755 *error = str_concat3(
1756 "Couldn't create pipe for \"", cmd, "\"");
1757 return bmake_strdup("");
1758 }
1759
1760 Var_ReexportVars(SCOPE_GLOBAL);
1761
1762 switch (cpid = vfork()) {
1763 case 0:
1764 (void)close(pipefds[0]);
1765 (void)dup2(pipefds[1], STDOUT_FILENO);
1766 (void)close(pipefds[1]);
1767
1768 (void)execv(shellPath, UNCONST(args));
1769 _exit(1);
1770 /* NOTREACHED */
1771
1772 case -1:
1773 *error = str_concat3("Couldn't exec \"", cmd, "\"");
1774 return bmake_strdup("");
1775 }
1776
1777 (void)close(pipefds[1]); /* No need for the writing half */
1778
1779 saved_errno = 0;
1780 Buf_Init(&buf);
1781
1782 do {
1783 char result[BUFSIZ];
1784 bytes_read = read(pipefds[0], result, sizeof result);
1785 if (bytes_read > 0)
1786 Buf_AddBytes(&buf, result, (size_t)bytes_read);
1787 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR));
1788 if (bytes_read == -1)
1789 saved_errno = errno;
1790
1791 (void)close(pipefds[0]); /* Close the input side of the pipe. */
1792
1793 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0)
1794 JobReapChild(pid, status, false);
1795
1796 if (Buf_EndsWith(&buf, '\n'))
1797 buf.data[buf.len - 1] = '\0';
1798
1799 output = Buf_DoneData(&buf);
1800 for (p = output; *p != '\0'; p++)
1801 if (*p == '\n')
1802 *p = ' ';
1803
1804 if (WIFSIGNALED(status))
1805 *error = str_concat3("\"", cmd, "\" exited on a signal");
1806 else if (WEXITSTATUS(status) != 0)
1807 *error = str_concat3(
1808 "\"", cmd, "\" returned non-zero status");
1809 else if (saved_errno != 0)
1810 *error = str_concat3(
1811 "Couldn't read shell's output for \"", cmd, "\"");
1812 else
1813 *error = NULL;
1814 if (cmd_file[0] != '\0')
1815 unlink(cmd_file);
1816 return output;
1817 }
1818
1819 /*
1820 * Print a printf-style error message.
1821 *
1822 * In default mode, this error message has no consequences, for compatibility
1823 * reasons, in particular it does not affect the exit status. Only in lint
1824 * mode (-dL) it does.
1825 */
1826 void
Error(const char * fmt,...)1827 Error(const char *fmt, ...)
1828 {
1829 va_list ap;
1830 FILE *f;
1831
1832 f = opts.debug_file;
1833 if (f == stdout)
1834 f = stderr;
1835 (void)fflush(stdout);
1836
1837 for (;;) {
1838 fprintf(f, "%s: ", progname);
1839 va_start(ap, fmt);
1840 (void)vfprintf(f, fmt, ap);
1841 va_end(ap);
1842 (void)fprintf(f, "\n");
1843 (void)fflush(f);
1844 if (f == stderr)
1845 break;
1846 f = stderr;
1847 }
1848 main_errors++;
1849 }
1850
1851 /*
1852 * Wait for any running jobs to finish, then produce an error message,
1853 * finally exit immediately.
1854 *
1855 * Exiting immediately differs from Parse_Error, which exits only after the
1856 * current top-level makefile has been parsed completely.
1857 */
1858 void
Fatal(const char * fmt,...)1859 Fatal(const char *fmt, ...)
1860 {
1861 va_list ap;
1862
1863 if (jobsRunning)
1864 Job_Wait();
1865
1866 (void)fflush(stdout);
1867 fprintf(stderr, "%s: ", progname);
1868 va_start(ap, fmt);
1869 (void)vfprintf(stderr, fmt, ap);
1870 va_end(ap);
1871 (void)fprintf(stderr, "\n");
1872 (void)fflush(stderr);
1873 PrintStackTrace(true);
1874
1875 PrintOnError(NULL, "\n");
1876
1877 if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1878 Targ_PrintGraph(2);
1879 Trace_Log(MAKEERROR, NULL);
1880 exit(2); /* Not 1 so -q can distinguish error */
1881 }
1882
1883 /*
1884 * Major exception once jobs are being created.
1885 * Kills all jobs, prints a message and exits.
1886 */
1887 void
Punt(const char * fmt,...)1888 Punt(const char *fmt, ...)
1889 {
1890 va_list ap;
1891
1892 (void)fflush(stdout);
1893 (void)fprintf(stderr, "%s: ", progname);
1894 va_start(ap, fmt);
1895 (void)vfprintf(stderr, fmt, ap);
1896 va_end(ap);
1897 (void)fprintf(stderr, "\n");
1898 (void)fflush(stderr);
1899
1900 PrintOnError(NULL, "\n");
1901
1902 DieHorribly();
1903 }
1904
1905 /* Exit without giving a message. */
1906 void
DieHorribly(void)1907 DieHorribly(void)
1908 {
1909 if (jobsRunning)
1910 Job_AbortAll();
1911 if (DEBUG(GRAPH2))
1912 Targ_PrintGraph(2);
1913 Trace_Log(MAKEERROR, NULL);
1914 exit(2); /* Not 1 so -q can distinguish error */
1915 }
1916
1917 /*
1918 * Called when aborting due to errors in child shell to signal abnormal exit.
1919 * The program exits.
1920 * Errors is the number of errors encountered in Make_Make.
1921 */
1922 void
Finish(int errs)1923 Finish(int errs)
1924 {
1925 if (shouldDieQuietly(NULL, -1))
1926 exit(2);
1927 Fatal("%d error%s", errs, errs == 1 ? "" : "s");
1928 }
1929
1930 int
unlink_file(const char * file)1931 unlink_file(const char *file)
1932 {
1933 struct stat st;
1934
1935 if (lstat(file, &st) == -1)
1936 return -1;
1937
1938 if (S_ISDIR(st.st_mode)) {
1939 /*
1940 * POSIX says for unlink: "The path argument shall not name
1941 * a directory unless [...]".
1942 */
1943 errno = EISDIR;
1944 return -1;
1945 }
1946 return unlink(file);
1947 }
1948
1949 static void
write_all(int fd,const void * data,size_t n)1950 write_all(int fd, const void *data, size_t n)
1951 {
1952 const char *mem = data;
1953
1954 while (n > 0) {
1955 ssize_t written = write(fd, mem, n);
1956 /* XXX: Should this EAGAIN be EINTR? */
1957 if (written == -1 && errno == EAGAIN)
1958 continue;
1959 if (written == -1)
1960 break;
1961 mem += written;
1962 n -= (size_t)written;
1963 }
1964 }
1965
1966 /* Print why exec failed, avoiding stdio. */
1967 void MAKE_ATTR_DEAD
execDie(const char * af,const char * av)1968 execDie(const char *af, const char *av)
1969 {
1970 Buffer buf;
1971
1972 Buf_Init(&buf);
1973 Buf_AddStr(&buf, progname);
1974 Buf_AddStr(&buf, ": ");
1975 Buf_AddStr(&buf, af);
1976 Buf_AddStr(&buf, "(");
1977 Buf_AddStr(&buf, av);
1978 Buf_AddStr(&buf, ") failed (");
1979 Buf_AddStr(&buf, strerror(errno));
1980 Buf_AddStr(&buf, ")\n");
1981
1982 write_all(STDERR_FILENO, buf.data, buf.len);
1983
1984 Buf_Done(&buf);
1985 _exit(1);
1986 }
1987
1988 static void
purge_relative_cached_realpaths(void)1989 purge_relative_cached_realpaths(void)
1990 {
1991 HashEntry *he, *next;
1992 HashIter hi;
1993
1994 HashIter_Init(&hi, &cached_realpaths);
1995 he = HashIter_Next(&hi);
1996 while (he != NULL) {
1997 next = HashIter_Next(&hi);
1998 if (he->key[0] != '/') {
1999 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key);
2000 HashTable_DeleteEntry(&cached_realpaths, he);
2001 /*
2002 * XXX: What about the allocated he->value? Either
2003 * free them or document why they cannot be freed.
2004 */
2005 }
2006 he = next;
2007 }
2008 }
2009
2010 const char *
cached_realpath(const char * pathname,char * resolved)2011 cached_realpath(const char *pathname, char *resolved)
2012 {
2013 const char *rp;
2014
2015 if (pathname == NULL || pathname[0] == '\0')
2016 return NULL;
2017
2018 rp = HashTable_FindValue(&cached_realpaths, pathname);
2019 if (rp != NULL) {
2020 /* a hit */
2021 strncpy(resolved, rp, MAXPATHLEN);
2022 resolved[MAXPATHLEN - 1] = '\0';
2023 return resolved;
2024 }
2025
2026 rp = realpath(pathname, resolved);
2027 if (rp != NULL) {
2028 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp));
2029 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp);
2030 return resolved;
2031 }
2032
2033 /* should we negative-cache? */
2034 return NULL;
2035 }
2036
2037 /*
2038 * Return true if we should die without noise.
2039 * For example our failing child was a sub-make or failure happened elsewhere.
2040 */
2041 bool
shouldDieQuietly(GNode * gn,int bf)2042 shouldDieQuietly(GNode *gn, int bf)
2043 {
2044 static int quietly = -1;
2045
2046 if (quietly < 0) {
2047 if (DEBUG(JOB) ||
2048 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true))
2049 quietly = 0;
2050 else if (bf >= 0)
2051 quietly = bf;
2052 else
2053 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0;
2054 }
2055 return quietly != 0;
2056 }
2057
2058 static void
SetErrorVars(GNode * gn)2059 SetErrorVars(GNode *gn)
2060 {
2061 StringListNode *ln;
2062 char sts[16];
2063
2064 /*
2065 * We can print this even if there is no .ERROR target.
2066 */
2067 snprintf(sts, sizeof(sts), "%d", gn->exit_status);
2068 Global_Set(".ERROR_EXIT", sts);
2069 Global_Set(".ERROR_TARGET", gn->name);
2070 Global_Delete(".ERROR_CMD");
2071
2072 for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
2073 const char *cmd = ln->datum;
2074
2075 if (cmd == NULL)
2076 break;
2077 Global_Append(".ERROR_CMD", cmd);
2078 }
2079 }
2080
2081 /*
2082 * Print some helpful information in case of an error.
2083 * The caller should exit soon after calling this function.
2084 */
2085 void
PrintOnError(GNode * gn,const char * msg)2086 PrintOnError(GNode *gn, const char *msg)
2087 {
2088 static GNode *errorNode = NULL;
2089
2090 if (DEBUG(HASH)) {
2091 Targ_Stats();
2092 Var_Stats();
2093 }
2094
2095 if (errorNode != NULL)
2096 return; /* we've been here! */
2097
2098 printf("%s%s: stopped in %s\n", msg, progname, curdir);
2099
2100 /* we generally want to keep quiet if a sub-make died */
2101 if (shouldDieQuietly(gn, -1))
2102 return;
2103
2104 if (gn != NULL)
2105 SetErrorVars(gn);
2106
2107 {
2108 char *errorVarsValues = Var_Subst(
2109 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
2110 SCOPE_GLOBAL, VARE_WANTRES);
2111 /* TODO: handle errors */
2112 printf("%s", errorVarsValues);
2113 free(errorVarsValues);
2114 }
2115
2116 fflush(stdout);
2117
2118 /*
2119 * Finally, see if there is a .ERROR target, and run it if so.
2120 */
2121 errorNode = Targ_FindNode(".ERROR");
2122 if (errorNode != NULL) {
2123 errorNode->type |= OP_SPECIAL;
2124 Compat_Make(errorNode, errorNode);
2125 }
2126 }
2127
2128 void
Main_ExportMAKEFLAGS(bool first)2129 Main_ExportMAKEFLAGS(bool first)
2130 {
2131 static bool once = true;
2132 char *flags;
2133
2134 if (once != first)
2135 return;
2136 once = false;
2137
2138 flags = Var_Subst(
2139 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
2140 SCOPE_CMDLINE, VARE_WANTRES);
2141 /* TODO: handle errors */
2142 if (flags[0] != '\0')
2143 setenv("MAKEFLAGS", flags, 1);
2144 }
2145
2146 char *
getTmpdir(void)2147 getTmpdir(void)
2148 {
2149 static char *tmpdir = NULL;
2150 struct stat st;
2151
2152 if (tmpdir != NULL)
2153 return tmpdir;
2154
2155 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */
2156 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/",
2157 SCOPE_GLOBAL, VARE_WANTRES);
2158 /* TODO: handle errors */
2159
2160 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2161 free(tmpdir);
2162 tmpdir = bmake_strdup(_PATH_TMP);
2163 }
2164 return tmpdir;
2165 }
2166
2167 /*
2168 * Create and open a temp file using "pattern".
2169 * If tfile is provided, set it to a copy of the filename created.
2170 * Otherwise unlink the file once open.
2171 */
2172 int
mkTempFile(const char * pattern,char * tfile,size_t tfile_sz)2173 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz)
2174 {
2175 static char *tmpdir = NULL;
2176 char tbuf[MAXPATHLEN];
2177 int fd;
2178
2179 if (pattern == NULL)
2180 pattern = TMPPAT;
2181 if (tmpdir == NULL)
2182 tmpdir = getTmpdir();
2183 if (tfile == NULL) {
2184 tfile = tbuf;
2185 tfile_sz = sizeof tbuf;
2186 }
2187
2188 if (pattern[0] == '/')
2189 snprintf(tfile, tfile_sz, "%s", pattern);
2190 else
2191 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern);
2192
2193 if ((fd = mkstemp(tfile)) < 0)
2194 Punt("Could not create temporary file %s: %s", tfile,
2195 strerror(errno));
2196 if (tfile == tbuf)
2197 unlink(tfile); /* we just want the descriptor */
2198
2199 return fd;
2200 }
2201
2202 /*
2203 * Convert a string representation of a boolean into a boolean value.
2204 * Anything that looks like "No", "False", "Off", "0" etc. is false,
2205 * the empty string is the fallback, everything else is true.
2206 */
2207 bool
ParseBoolean(const char * s,bool fallback)2208 ParseBoolean(const char *s, bool fallback)
2209 {
2210 char ch = ch_tolower(s[0]);
2211 if (ch == '\0')
2212 return fallback;
2213 if (ch == '0' || ch == 'f' || ch == 'n')
2214 return false;
2215 if (ch == 'o')
2216 return ch_tolower(s[1]) != 'f';
2217 return true;
2218 }
2219