1 /* $NetBSD: main.c,v 1.583 2022/09/28 16:34:47 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 1.583 2022/09/28 16:34:47 sjg 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 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",
230 fname);
231 exit(2);
232 }
233 free(fname);
234 }
235
236 static void
MainParseArgDebug(const char * argvalue)237 MainParseArgDebug(const char *argvalue)
238 {
239 const char *modules;
240 DebugFlags debug = opts.debug;
241
242 for (modules = argvalue; *modules != '\0'; modules++) {
243 switch (*modules) {
244 case '0': /* undocumented, only intended for tests */
245 memset(&debug, 0, sizeof(debug));
246 break;
247 case 'A':
248 memset(&debug, ~0, sizeof(debug));
249 break;
250 case 'a':
251 debug.DEBUG_ARCH = true;
252 break;
253 case 'C':
254 debug.DEBUG_CWD = true;
255 break;
256 case 'c':
257 debug.DEBUG_COND = true;
258 break;
259 case 'd':
260 debug.DEBUG_DIR = true;
261 break;
262 case 'e':
263 debug.DEBUG_ERROR = true;
264 break;
265 case 'f':
266 debug.DEBUG_FOR = true;
267 break;
268 case 'g':
269 if (modules[1] == '1') {
270 debug.DEBUG_GRAPH1 = true;
271 modules++;
272 } else if (modules[1] == '2') {
273 debug.DEBUG_GRAPH2 = true;
274 modules++;
275 } else if (modules[1] == '3') {
276 debug.DEBUG_GRAPH3 = true;
277 modules++;
278 }
279 break;
280 case 'h':
281 debug.DEBUG_HASH = true;
282 break;
283 case 'j':
284 debug.DEBUG_JOB = true;
285 break;
286 case 'L':
287 opts.strict = true;
288 break;
289 case 'l':
290 debug.DEBUG_LOUD = true;
291 break;
292 case 'M':
293 debug.DEBUG_META = true;
294 break;
295 case 'm':
296 debug.DEBUG_MAKE = true;
297 break;
298 case 'n':
299 debug.DEBUG_SCRIPT = true;
300 break;
301 case 'p':
302 debug.DEBUG_PARSE = true;
303 break;
304 case 's':
305 debug.DEBUG_SUFF = true;
306 break;
307 case 't':
308 debug.DEBUG_TARG = true;
309 break;
310 case 'V':
311 opts.debugVflag = true;
312 break;
313 case 'v':
314 debug.DEBUG_VAR = true;
315 break;
316 case 'x':
317 debug.DEBUG_SHELL = true;
318 break;
319 case 'F':
320 MainParseArgDebugFile(modules + 1);
321 goto finish;
322 default:
323 (void)fprintf(stderr,
324 "%s: illegal argument to d option -- %c\n",
325 progname, *modules);
326 usage();
327 }
328 }
329
330 finish:
331 opts.debug = debug;
332
333 setvbuf(opts.debug_file, NULL, _IONBF, 0);
334 if (opts.debug_file != stdout)
335 setvbuf(stdout, NULL, _IOLBF, 0);
336 }
337
338 /* Is path relative or does it contain any relative component "." or ".."? */
339 static bool
IsRelativePath(const char * path)340 IsRelativePath(const char *path)
341 {
342 const char *p;
343
344 if (path[0] != '/')
345 return true;
346 p = path;
347 while ((p = strstr(p, "/.")) != NULL) {
348 p += 2;
349 if (*p == '.')
350 p++;
351 if (*p == '/' || *p == '\0')
352 return true;
353 }
354 return false;
355 }
356
357 static void
MainParseArgChdir(const char * argvalue)358 MainParseArgChdir(const char *argvalue)
359 {
360 struct stat sa, sb;
361
362 if (chdir(argvalue) == -1) {
363 (void)fprintf(stderr, "%s: chdir %s: %s\n",
364 progname, argvalue, strerror(errno));
365 exit(2); /* Not 1 so -q can distinguish error */
366 }
367 if (getcwd(curdir, MAXPATHLEN) == NULL) {
368 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
369 exit(2);
370 }
371 if (!IsRelativePath(argvalue) &&
372 stat(argvalue, &sa) != -1 &&
373 stat(curdir, &sb) != -1 &&
374 sa.st_ino == sb.st_ino &&
375 sa.st_dev == sb.st_dev)
376 strncpy(curdir, argvalue, MAXPATHLEN);
377 ignorePWD = true;
378 }
379
380 static void
MainParseArgJobsInternal(const char * argvalue)381 MainParseArgJobsInternal(const char *argvalue)
382 {
383 char end;
384 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) {
385 (void)fprintf(stderr,
386 "%s: internal error -- J option malformed (%s)\n",
387 progname, argvalue);
388 usage();
389 }
390 if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
391 (fcntl(jp_1, F_GETFD, 0) < 0)) {
392 jp_0 = -1;
393 jp_1 = -1;
394 opts.compatMake = true;
395 } else {
396 Global_Append(MAKEFLAGS, "-J");
397 Global_Append(MAKEFLAGS, argvalue);
398 }
399 }
400
401 static void
MainParseArgJobs(const char * argvalue)402 MainParseArgJobs(const char *argvalue)
403 {
404 char *p;
405
406 forceJobs = true;
407 opts.maxJobs = (int)strtol(argvalue, &p, 0);
408 if (*p != '\0' || opts.maxJobs < 1) {
409 (void)fprintf(stderr,
410 "%s: illegal argument to -j -- must be positive integer!\n",
411 progname);
412 exit(2); /* Not 1 so -q can distinguish error */
413 }
414 Global_Append(MAKEFLAGS, "-j");
415 Global_Append(MAKEFLAGS, argvalue);
416 Global_Set(".MAKE.JOBS", argvalue);
417 maxJobTokens = opts.maxJobs;
418 }
419
420 static void
MainParseArgSysInc(const char * argvalue)421 MainParseArgSysInc(const char *argvalue)
422 {
423 /* look for magic parent directory search string */
424 if (strncmp(".../", argvalue, 4) == 0) {
425 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4);
426 if (found_path == NULL)
427 return;
428 (void)SearchPath_Add(sysIncPath, found_path);
429 free(found_path);
430 } else {
431 (void)SearchPath_Add(sysIncPath, argvalue);
432 }
433 Global_Append(MAKEFLAGS, "-m");
434 Global_Append(MAKEFLAGS, argvalue);
435 }
436
437 static bool
MainParseArg(char c,const char * argvalue)438 MainParseArg(char c, const char *argvalue)
439 {
440 switch (c) {
441 case '\0':
442 break;
443 case 'B':
444 opts.compatMake = true;
445 Global_Append(MAKEFLAGS, "-B");
446 Global_Set(MAKE_MODE, "compat");
447 break;
448 case 'C':
449 MainParseArgChdir(argvalue);
450 break;
451 case 'D':
452 if (argvalue[0] == '\0')
453 return false;
454 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1");
455 Global_Append(MAKEFLAGS, "-D");
456 Global_Append(MAKEFLAGS, argvalue);
457 break;
458 case 'I':
459 Parse_AddIncludeDir(argvalue);
460 Global_Append(MAKEFLAGS, "-I");
461 Global_Append(MAKEFLAGS, argvalue);
462 break;
463 case 'J':
464 MainParseArgJobsInternal(argvalue);
465 break;
466 case 'N':
467 opts.noExecute = true;
468 opts.noRecursiveExecute = true;
469 Global_Append(MAKEFLAGS, "-N");
470 break;
471 case 'S':
472 opts.keepgoing = false;
473 Global_Append(MAKEFLAGS, "-S");
474 break;
475 case 'T':
476 tracefile = bmake_strdup(argvalue);
477 Global_Append(MAKEFLAGS, "-T");
478 Global_Append(MAKEFLAGS, argvalue);
479 break;
480 case 'V':
481 case 'v':
482 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED;
483 Lst_Append(&opts.variables, bmake_strdup(argvalue));
484 /* XXX: Why always -V? */
485 Global_Append(MAKEFLAGS, "-V");
486 Global_Append(MAKEFLAGS, argvalue);
487 break;
488 case 'W':
489 opts.parseWarnFatal = true;
490 /* XXX: why no Global_Append? */
491 break;
492 case 'X':
493 opts.varNoExportEnv = true;
494 Global_Append(MAKEFLAGS, "-X");
495 break;
496 case 'd':
497 /* If '-d-opts' don't pass to children */
498 if (argvalue[0] == '-')
499 argvalue++;
500 else {
501 Global_Append(MAKEFLAGS, "-d");
502 Global_Append(MAKEFLAGS, argvalue);
503 }
504 MainParseArgDebug(argvalue);
505 break;
506 case 'e':
507 opts.checkEnvFirst = true;
508 Global_Append(MAKEFLAGS, "-e");
509 break;
510 case 'f':
511 Lst_Append(&opts.makefiles, bmake_strdup(argvalue));
512 break;
513 case 'i':
514 opts.ignoreErrors = true;
515 Global_Append(MAKEFLAGS, "-i");
516 break;
517 case 'j':
518 MainParseArgJobs(argvalue);
519 break;
520 case 'k':
521 opts.keepgoing = true;
522 Global_Append(MAKEFLAGS, "-k");
523 break;
524 case 'm':
525 MainParseArgSysInc(argvalue);
526 /* XXX: why no Var_Append? */
527 break;
528 case 'n':
529 opts.noExecute = true;
530 Global_Append(MAKEFLAGS, "-n");
531 break;
532 case 'q':
533 opts.query = true;
534 /* Kind of nonsensical, wot? */
535 Global_Append(MAKEFLAGS, "-q");
536 break;
537 case 'r':
538 opts.noBuiltins = true;
539 Global_Append(MAKEFLAGS, "-r");
540 break;
541 case 's':
542 opts.silent = true;
543 Global_Append(MAKEFLAGS, "-s");
544 break;
545 case 't':
546 opts.touch = true;
547 Global_Append(MAKEFLAGS, "-t");
548 break;
549 case 'w':
550 opts.enterFlag = true;
551 Global_Append(MAKEFLAGS, "-w");
552 break;
553 default:
554 usage();
555 }
556 return true;
557 }
558
559 /*
560 * Parse the given arguments. Called from main() and from
561 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
562 *
563 * The arguments must be treated as read-only and will be freed after the
564 * call.
565 *
566 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
567 */
568 static void
MainParseArgs(int argc,char ** argv)569 MainParseArgs(int argc, char **argv)
570 {
571 char c;
572 int arginc;
573 char *argvalue;
574 char *optscan;
575 bool inOption, dashDash = false;
576
577 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w";
578 /* Can't actually use getopt(3) because rescanning is not portable */
579
580 rearg:
581 inOption = false;
582 optscan = NULL;
583 while (argc > 1) {
584 const char *optspec;
585 if (!inOption)
586 optscan = argv[1];
587 c = *optscan++;
588 arginc = 0;
589 if (inOption) {
590 if (c == '\0') {
591 argv++;
592 argc--;
593 inOption = false;
594 continue;
595 }
596 } else {
597 if (c != '-' || dashDash)
598 break;
599 inOption = true;
600 c = *optscan++;
601 }
602 /* '-' found at some earlier point */
603 optspec = strchr(optspecs, c);
604 if (c != '\0' && optspec != NULL && optspec[1] == ':') {
605 /*
606 * -<something> found, and <something> should have an
607 * argument
608 */
609 inOption = false;
610 arginc = 1;
611 argvalue = optscan;
612 if (*argvalue == '\0') {
613 if (argc < 3)
614 goto noarg;
615 argvalue = argv[2];
616 arginc = 2;
617 }
618 } else {
619 argvalue = NULL;
620 }
621 switch (c) {
622 case '\0':
623 arginc = 1;
624 inOption = false;
625 break;
626 case '-':
627 dashDash = true;
628 break;
629 default:
630 if (!MainParseArg(c, argvalue))
631 goto noarg;
632 }
633 argv += arginc;
634 argc -= arginc;
635 }
636
637 /*
638 * See if the rest of the arguments are variable assignments and
639 * perform them if so. Else take them to be targets and stuff them
640 * on the end of the "create" list.
641 */
642 for (; argc > 1; argv++, argc--) {
643 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) {
644 if (argv[1][0] == '\0')
645 Punt("illegal (null) argument.");
646 if (argv[1][0] == '-' && !dashDash)
647 goto rearg;
648 Lst_Append(&opts.create, bmake_strdup(argv[1]));
649 }
650 }
651
652 return;
653 noarg:
654 (void)fprintf(stderr, "%s: option requires an argument -- %c\n",
655 progname, c);
656 usage();
657 }
658
659 /*
660 * Break a line of arguments into words and parse them.
661 *
662 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and
663 * by main() when reading the MAKEFLAGS environment variable.
664 */
665 void
Main_ParseArgLine(const char * line)666 Main_ParseArgLine(const char *line)
667 {
668 Words words;
669 char *buf;
670
671 if (line == NULL)
672 return;
673 /* XXX: don't use line as an iterator variable */
674 for (; *line == ' '; line++)
675 continue;
676 if (line[0] == '\0')
677 return;
678
679 #ifndef POSIX
680 {
681 /*
682 * $MAKE may simply be naming the make(1) binary
683 */
684 char *cp;
685
686 if (!(cp = strrchr(line, '/')))
687 cp = line;
688 if ((cp = strstr(cp, "make")) &&
689 strcmp(cp, "make") == 0)
690 return;
691 }
692 #endif
693 {
694 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE");
695 buf = str_concat3(argv0.str, " ", line);
696 FStr_Done(&argv0);
697 }
698
699 words = Str_Words(buf, true);
700 if (words.words == NULL) {
701 Error("Unterminated quoted string [%s]", buf);
702 free(buf);
703 return;
704 }
705 free(buf);
706 MainParseArgs((int)words.len, words.words);
707
708 Words_Free(words);
709 }
710
711 bool
Main_SetObjdir(bool writable,const char * fmt,...)712 Main_SetObjdir(bool writable, const char *fmt, ...)
713 {
714 struct stat sb;
715 char *path;
716 char buf[MAXPATHLEN + 1];
717 char buf2[MAXPATHLEN + 1];
718 va_list ap;
719
720 va_start(ap, fmt);
721 vsnprintf(path = buf, MAXPATHLEN, fmt, ap);
722 va_end(ap);
723
724 if (path[0] != '/') {
725 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN)
726 path = buf2;
727 else
728 return false;
729 }
730
731 /* look for the directory and try to chdir there */
732 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode))
733 return false;
734
735 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) {
736 (void)fprintf(stderr, "%s: warning: %s: %s.\n",
737 progname, path, strerror(errno));
738 return false;
739 }
740
741 snprintf(objdir, sizeof objdir, "%s", path);
742 Global_Set(".OBJDIR", objdir);
743 setenv("PWD", objdir, 1);
744 Dir_InitDot();
745 purge_relative_cached_realpaths();
746 if (opts.enterFlag && strcmp(objdir, curdir) != 0)
747 enterFlagObj = true;
748 return true;
749 }
750
751 static bool
SetVarObjdir(bool writable,const char * var,const char * suffix)752 SetVarObjdir(bool writable, const char *var, const char *suffix)
753 {
754 FStr path = Var_Value(SCOPE_CMDLINE, var);
755
756 if (path.str == NULL || path.str[0] == '\0') {
757 FStr_Done(&path);
758 return false;
759 }
760
761 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES);
762
763 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix);
764
765 FStr_Done(&path);
766 return true;
767 }
768
769 /*
770 * Splits str into words, adding them to the list.
771 * The string must be kept alive as long as the list.
772 */
773 int
str2Lst_Append(StringList * lp,char * str)774 str2Lst_Append(StringList *lp, char *str)
775 {
776 char *cp;
777 int n;
778
779 const char *sep = " \t";
780
781 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) {
782 Lst_Append(lp, cp);
783 n++;
784 }
785 return n;
786 }
787
788 #ifdef SIGINFO
789 /*ARGSUSED*/
790 static void
siginfo(int signo MAKE_ATTR_UNUSED)791 siginfo(int signo MAKE_ATTR_UNUSED)
792 {
793 char dir[MAXPATHLEN];
794 char str[2 * MAXPATHLEN];
795 int len;
796 if (getcwd(dir, sizeof dir) == NULL)
797 return;
798 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir);
799 if (len > 0)
800 (void)write(STDERR_FILENO, str, (size_t)len);
801 }
802 #endif
803
804 /* Allow makefiles some control over the mode we run in. */
805 static void
MakeMode(void)806 MakeMode(void)
807 {
808 char *mode;
809
810 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode);
811 /* TODO: handle errors */
812
813 if (mode[0] != '\0') {
814 if (strstr(mode, "compat") != NULL) {
815 opts.compatMake = true;
816 forceJobs = false;
817 }
818 #if USE_META
819 if (strstr(mode, "meta") != NULL)
820 meta_mode_init(mode);
821 #endif
822 if (strstr(mode, "randomize-targets") != NULL)
823 opts.randomizeTargets = true;
824 }
825
826 free(mode);
827 }
828
829 static void
PrintVar(const char * varname,bool expandVars)830 PrintVar(const char *varname, bool expandVars)
831 {
832 if (strchr(varname, '$') != NULL) {
833 char *evalue;
834 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue);
835 /* TODO: handle errors */
836 printf("%s\n", evalue);
837 free(evalue);
838
839 } else if (expandVars) {
840 char *expr = str_concat3("${", varname, "}");
841 char *evalue;
842 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue);
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 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value);
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 * All this code is so that we know where we are when we start up
1025 * on a different machine with pmake.
1026 *
1027 * XXX: Make no longer has "local" and "remote" mode. Is this code still
1028 * necessary?
1029 *
1030 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1031 * since the value of curdir can vary depending on how we got
1032 * here. Ie sitting at a shell prompt (shell that provides $PWD)
1033 * or via subdir.mk in which case its likely a shell which does
1034 * not provide it.
1035 *
1036 * So, to stop it breaking this case only, we ignore PWD if
1037 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression.
1038 */
1039 static void
HandlePWD(const struct stat * curdir_st)1040 HandlePWD(const struct stat *curdir_st)
1041 {
1042 char *pwd;
1043 FStr makeobjdir;
1044 struct stat pwd_st;
1045
1046 if (ignorePWD || (pwd = getenv("PWD")) == NULL)
1047 return;
1048
1049 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"))
1050 return;
1051
1052 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR");
1053 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL)
1054 goto ignore_pwd;
1055
1056 if (stat(pwd, &pwd_st) == 0 &&
1057 curdir_st->st_ino == pwd_st.st_ino &&
1058 curdir_st->st_dev == pwd_st.st_dev)
1059 (void)strncpy(curdir, pwd, MAXPATHLEN);
1060
1061 ignore_pwd:
1062 FStr_Done(&makeobjdir);
1063 }
1064 #endif
1065
1066 /*
1067 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set
1068 * in the environment, try only that value and fall back to .CURDIR if it
1069 * does not exist.
1070 *
1071 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
1072 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these
1073 * paths exist, just use .CURDIR.
1074 */
1075 static void
InitObjdir(const char * machine,const char * machine_arch)1076 InitObjdir(const char *machine, const char *machine_arch)
1077 {
1078 bool writable;
1079
1080 Dir_InitCur(curdir);
1081 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true);
1082 (void)Main_SetObjdir(false, "%s", curdir);
1083
1084 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) &&
1085 !SetVarObjdir(writable, "MAKEOBJDIR", "") &&
1086 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
1087 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) &&
1088 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR))
1089 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir);
1090 }
1091
1092 /* get rid of resource limit on file descriptors */
1093 static void
UnlimitFiles(void)1094 UnlimitFiles(void)
1095 {
1096 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
1097 struct rlimit rl;
1098 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
1099 rl.rlim_cur != rl.rlim_max) {
1100 rl.rlim_cur = rl.rlim_max;
1101 (void)setrlimit(RLIMIT_NOFILE, &rl);
1102 }
1103 #endif
1104 }
1105
1106 static void
CmdOpts_Init(void)1107 CmdOpts_Init(void)
1108 {
1109 opts.compatMake = false;
1110 memset(&opts.debug, 0, sizeof(opts.debug));
1111 /* opts.debug_file has already been initialized earlier */
1112 opts.strict = false;
1113 opts.debugVflag = false;
1114 opts.checkEnvFirst = false;
1115 Lst_Init(&opts.makefiles);
1116 opts.ignoreErrors = false; /* Pay attention to non-zero returns */
1117 opts.maxJobs = 1;
1118 opts.keepgoing = false; /* Stop on error */
1119 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */
1120 opts.noExecute = false; /* Execute all commands */
1121 opts.query = false;
1122 opts.noBuiltins = false; /* Read the built-in rules */
1123 opts.silent = false; /* Print commands as executed */
1124 opts.touch = false;
1125 opts.printVars = PVM_NONE;
1126 Lst_Init(&opts.variables);
1127 opts.parseWarnFatal = false;
1128 opts.enterFlag = false;
1129 opts.varNoExportEnv = false;
1130 Lst_Init(&opts.create);
1131 }
1132
1133 /*
1134 * Initialize MAKE and .MAKE to the path of the executable, so that it can be
1135 * found by execvp(3) and the shells, even after a chdir.
1136 *
1137 * If it's a relative path and contains a '/', resolve it to an absolute path.
1138 * Otherwise keep it as is, assuming it will be found in the PATH.
1139 */
1140 static void
InitVarMake(const char * argv0)1141 InitVarMake(const char *argv0)
1142 {
1143 const char *make = argv0;
1144
1145 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) {
1146 char pathbuf[MAXPATHLEN];
1147 const char *abspath = cached_realpath(argv0, pathbuf);
1148 struct stat st;
1149 if (abspath != NULL && abspath[0] == '/' &&
1150 stat(make, &st) == 0)
1151 make = abspath;
1152 }
1153
1154 Global_Set("MAKE", make);
1155 Global_Set(".MAKE", make);
1156 }
1157
1158 /*
1159 * Add the directories from the colon-separated syspath to defSysIncPath.
1160 * After returning, the contents of syspath is unspecified.
1161 */
1162 static void
InitDefSysIncPath(char * syspath)1163 InitDefSysIncPath(char *syspath)
1164 {
1165 static char defsyspath[] = _PATH_DEFSYSPATH;
1166 char *start, *cp;
1167
1168 /*
1169 * If no user-supplied system path was given (through the -m option)
1170 * add the directories from the DEFSYSPATH (more than one may be given
1171 * as dir1:...:dirn) to the system include path.
1172 */
1173 if (syspath == NULL || syspath[0] == '\0')
1174 syspath = defsyspath;
1175 else
1176 syspath = bmake_strdup(syspath);
1177
1178 for (start = syspath; *start != '\0'; start = cp) {
1179 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
1180 continue;
1181 if (*cp == ':')
1182 *cp++ = '\0';
1183
1184 /* look for magic parent directory search string */
1185 if (strncmp(start, ".../", 4) == 0) {
1186 char *dir = Dir_FindHereOrAbove(curdir, start + 4);
1187 if (dir != NULL) {
1188 (void)SearchPath_Add(defSysIncPath, dir);
1189 free(dir);
1190 }
1191 } else {
1192 (void)SearchPath_Add(defSysIncPath, start);
1193 }
1194 }
1195
1196 if (syspath != defsyspath)
1197 free(syspath);
1198 }
1199
1200 static void
ReadBuiltinRules(void)1201 ReadBuiltinRules(void)
1202 {
1203 StringListNode *ln;
1204 StringList sysMkFiles = LST_INIT;
1205
1206 SearchPath_Expand(
1207 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath,
1208 _PATH_DEFSYSMK,
1209 &sysMkFiles);
1210 if (Lst_IsEmpty(&sysMkFiles))
1211 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK);
1212
1213 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next)
1214 if (ReadMakefile(ln->datum))
1215 break;
1216
1217 if (ln == NULL)
1218 Fatal("%s: cannot open %s.",
1219 progname, (const char *)sysMkFiles.first->datum);
1220
1221 Lst_DoneCall(&sysMkFiles, free);
1222 }
1223
1224 static void
InitMaxJobs(void)1225 InitMaxJobs(void)
1226 {
1227 char *value;
1228 int n;
1229
1230 if (forceJobs || opts.compatMake ||
1231 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS"))
1232 return;
1233
1234 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value);
1235 /* TODO: handle errors */
1236 n = (int)strtol(value, NULL, 0);
1237 if (n < 1) {
1238 (void)fprintf(stderr,
1239 "%s: illegal value for .MAKE.JOBS "
1240 "-- must be positive integer!\n",
1241 progname);
1242 exit(2); /* Not 1 so -q can distinguish error */
1243 }
1244
1245 if (n != opts.maxJobs) {
1246 Global_Append(MAKEFLAGS, "-j");
1247 Global_Append(MAKEFLAGS, value);
1248 }
1249
1250 opts.maxJobs = n;
1251 maxJobTokens = opts.maxJobs;
1252 forceJobs = true;
1253 free(value);
1254 }
1255
1256 /*
1257 * For compatibility, look at the directories in the VPATH variable
1258 * and add them to the search path, if the variable is defined. The
1259 * variable's value is in the same format as the PATH environment
1260 * variable, i.e. <directory>:<directory>:<directory>...
1261 */
1262 static void
InitVpath(void)1263 InitVpath(void)
1264 {
1265 char *vpath, savec, *path;
1266 if (!Var_Exists(SCOPE_CMDLINE, "VPATH"))
1267 return;
1268
1269 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath);
1270 /* TODO: handle errors */
1271 path = vpath;
1272 do {
1273 char *cp;
1274 /* skip to end of directory */
1275 for (cp = path; *cp != ':' && *cp != '\0'; cp++)
1276 continue;
1277 /* Save terminator character so know when to stop */
1278 savec = *cp;
1279 *cp = '\0';
1280 /* Add directory to search path */
1281 (void)SearchPath_Add(&dirSearchPath, path);
1282 *cp = savec;
1283 path = cp + 1;
1284 } while (savec == ':');
1285 free(vpath);
1286 }
1287
1288 static void
ReadAllMakefiles(const StringList * makefiles)1289 ReadAllMakefiles(const StringList *makefiles)
1290 {
1291 StringListNode *ln;
1292
1293 for (ln = makefiles->first; ln != NULL; ln = ln->next) {
1294 const char *fname = ln->datum;
1295 if (!ReadMakefile(fname))
1296 Fatal("%s: cannot open %s.", progname, fname);
1297 }
1298 }
1299
1300 static void
ReadFirstDefaultMakefile(void)1301 ReadFirstDefaultMakefile(void)
1302 {
1303 StringList makefiles = LST_INIT;
1304 StringListNode *ln;
1305 char *prefs;
1306
1307 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}",
1308 SCOPE_CMDLINE, VARE_WANTRES, &prefs);
1309 /* TODO: handle errors */
1310
1311 (void)str2Lst_Append(&makefiles, prefs);
1312
1313 for (ln = makefiles.first; ln != NULL; ln = ln->next)
1314 if (ReadMakefile(ln->datum))
1315 break;
1316
1317 Lst_Done(&makefiles);
1318 free(prefs);
1319 }
1320
1321 /*
1322 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS.
1323 * Initialize a few modules.
1324 * Parse the arguments from MAKEFLAGS and the command line.
1325 */
1326 static void
main_Init(int argc,char ** argv)1327 main_Init(int argc, char **argv)
1328 {
1329 struct stat sa;
1330 const char *machine;
1331 const char *machine_arch;
1332 char *syspath = getenv("MAKESYSPATH");
1333 struct utsname utsname;
1334
1335 /* default to writing debug to stderr */
1336 opts.debug_file = stderr;
1337
1338 Str_Intern_Init();
1339 HashTable_Init(&cached_realpaths);
1340
1341 #ifdef SIGINFO
1342 (void)bmake_signal(SIGINFO, siginfo);
1343 #endif
1344
1345 InitRandom();
1346
1347 progname = str_basename(argv[0]);
1348
1349 UnlimitFiles();
1350
1351 if (uname(&utsname) == -1) {
1352 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
1353 strerror(errno));
1354 exit(2);
1355 }
1356
1357 /*
1358 * Get the name of this type of MACHINE from utsname
1359 * so we can share an executable for similar machines.
1360 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
1361 *
1362 * Note that both MACHINE and MACHINE_ARCH are decided at
1363 * run-time.
1364 */
1365 machine = InitVarMachine(&utsname);
1366 machine_arch = InitVarMachineArch();
1367
1368 myPid = getpid(); /* remember this for vFork() */
1369
1370 /*
1371 * Just in case MAKEOBJDIR wants us to do something tricky.
1372 */
1373 Targ_Init();
1374 Var_Init();
1375 Global_Set(".MAKE.OS", utsname.sysname);
1376 Global_Set("MACHINE", machine);
1377 Global_Set("MACHINE_ARCH", machine_arch);
1378 #ifdef MAKE_VERSION
1379 Global_Set("MAKE_VERSION", MAKE_VERSION);
1380 #endif
1381 Global_Set(".newline", "\n"); /* handy for :@ loops */
1382 #ifndef MAKEFILE_PREFERENCE_LIST
1383 /* This is the traditional preference for makefiles. */
1384 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
1385 #endif
1386 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST);
1387 Global_Set(MAKE_DEPENDFILE, ".depend");
1388
1389 CmdOpts_Init();
1390 allPrecious = false; /* Remove targets when interrupted */
1391 deleteOnError = false; /* Historical default behavior */
1392 jobsRunning = false;
1393
1394 maxJobTokens = opts.maxJobs;
1395 ignorePWD = false;
1396
1397 /*
1398 * Initialize the parsing, directory and variable modules to prepare
1399 * for the reading of inclusion paths and variable settings on the
1400 * command line
1401 */
1402
1403 /*
1404 * Initialize various variables.
1405 * MAKE also gets this name, for compatibility
1406 * .MAKEFLAGS gets set to the empty string just in case.
1407 * MFLAGS also gets initialized empty, for compatibility.
1408 */
1409 Parse_Init();
1410 InitVarMake(argv[0]);
1411 Global_Set(MAKEFLAGS, "");
1412 Global_Set(MAKEOVERRIDES, "");
1413 Global_Set("MFLAGS", "");
1414 Global_Set(".ALLTARGETS", "");
1415 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV);
1416
1417 /* Set some other useful variables. */
1418 {
1419 char buf[64], *ep = getenv(MAKE_LEVEL_ENV);
1420
1421 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0;
1422 if (makelevel < 0)
1423 makelevel = 0;
1424 snprintf(buf, sizeof buf, "%d", makelevel);
1425 Global_Set(MAKE_LEVEL, buf);
1426 snprintf(buf, sizeof buf, "%u", myPid);
1427 Global_Set(".MAKE.PID", buf);
1428 snprintf(buf, sizeof buf, "%u", getppid());
1429 Global_Set(".MAKE.PPID", buf);
1430 snprintf(buf, sizeof buf, "%u", getuid());
1431 Global_Set(".MAKE.UID", buf);
1432 snprintf(buf, sizeof buf, "%u", getgid());
1433 Global_Set(".MAKE.GID", buf);
1434
1435 /* DragonFly BSD specific global variables */
1436
1437 /*
1438 * It was used to identify the compiler that built world so that
1439 * a c++ issue during an ABI change could be worked around.
1440 * More info on commit: 673bdc16bff3eec8
1441 */
1442 Global_Set(".MAKE.BUILT.BY", CCVER);
1443
1444 /*
1445 * Added to speed up dports builds since there would be no
1446 * evaluation needed if already defined.
1447 * More info on commit: a4cce4724800c918
1448 */
1449 Global_Set(".MAKE.DF.VERSION", DFVER);
1450 Global_Set(".MAKE.DF.OSREL", OSREL);
1451 }
1452 if (makelevel > 0) {
1453 char pn[1024];
1454 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel);
1455 progname = bmake_strdup(pn);
1456 }
1457
1458 #ifdef USE_META
1459 meta_init();
1460 #endif
1461 Dir_Init();
1462
1463 #ifdef POSIX
1464 {
1465 char *makeflags = explode(getenv("MAKEFLAGS"));
1466 Main_ParseArgLine(makeflags);
1467 free(makeflags);
1468 }
1469 #else
1470 /*
1471 * First snag any flags out of the MAKE environment variable.
1472 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
1473 * in a different format).
1474 */
1475 Main_ParseArgLine(getenv("MAKE"));
1476 #endif
1477
1478 if (getcwd(curdir, MAXPATHLEN) == NULL) {
1479 (void)fprintf(stderr, "%s: getcwd: %s.\n",
1480 progname, strerror(errno));
1481 exit(2);
1482 }
1483
1484 MainParseArgs(argc, argv);
1485
1486 if (opts.enterFlag)
1487 printf("%s: Entering directory `%s'\n", progname, curdir);
1488
1489 if (stat(curdir, &sa) == -1) {
1490 (void)fprintf(stderr, "%s: %s: %s.\n",
1491 progname, curdir, strerror(errno));
1492 exit(2);
1493 }
1494
1495 #ifndef NO_PWD_OVERRIDE
1496 HandlePWD(&sa);
1497 #endif
1498 Global_Set(".CURDIR", curdir);
1499
1500 InitObjdir(machine, machine_arch);
1501
1502 Arch_Init();
1503 Suff_Init();
1504 Trace_Init(tracefile);
1505
1506 defaultNode = NULL;
1507 (void)time(&now);
1508
1509 Trace_Log(MAKESTART, NULL);
1510
1511 InitVarTargets();
1512
1513 InitDefSysIncPath(syspath);
1514 }
1515
1516 /*
1517 * Read the system makefile followed by either makefile, Makefile or the
1518 * files given by the -f option. Exit on parse errors.
1519 */
1520 static void
main_ReadFiles(void)1521 main_ReadFiles(void)
1522 {
1523
1524 if (!opts.noBuiltins)
1525 ReadBuiltinRules();
1526
1527 posix_state = PS_MAYBE_NEXT_LINE;
1528 if (!Lst_IsEmpty(&opts.makefiles))
1529 ReadAllMakefiles(&opts.makefiles);
1530 else
1531 ReadFirstDefaultMakefile();
1532 }
1533
1534 /* Compute the dependency graph. */
1535 static void
main_PrepareMaking(void)1536 main_PrepareMaking(void)
1537 {
1538 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1539 if (!opts.noBuiltins || opts.printVars == PVM_NONE) {
1540 (void)Var_Subst("${.MAKE.DEPENDFILE}",
1541 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile);
1542 if (makeDependfile[0] != '\0') {
1543 /* TODO: handle errors */
1544 doing_depend = true;
1545 (void)ReadMakefile(makeDependfile);
1546 doing_depend = false;
1547 }
1548 }
1549
1550 if (enterFlagObj)
1551 printf("%s: Entering directory `%s'\n", progname, objdir);
1552
1553 MakeMode();
1554
1555 {
1556 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS);
1557 Global_Append("MFLAGS", makeflags.str);
1558 FStr_Done(&makeflags);
1559 }
1560
1561 InitMaxJobs();
1562
1563 if (!opts.compatMake && !forceJobs)
1564 opts.compatMake = true;
1565
1566 if (!opts.compatMake)
1567 Job_ServerStart(maxJobTokens, jp_0, jp_1);
1568 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1569 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0);
1570
1571 if (opts.printVars == PVM_NONE)
1572 Main_ExportMAKEFLAGS(true); /* initial export */
1573
1574 InitVpath();
1575
1576 /*
1577 * Now that all search paths have been read for suffixes et al, it's
1578 * time to add the default search path to their lists...
1579 */
1580 Suff_ExtendPaths();
1581
1582 /*
1583 * Propagate attributes through :: dependency lists.
1584 */
1585 Targ_Propagate();
1586
1587 /* print the initial graph, if the user requested it */
1588 if (DEBUG(GRAPH1))
1589 Targ_PrintGraph(1);
1590 }
1591
1592 /*
1593 * Make the targets.
1594 * If the -v or -V options are given, print variables instead.
1595 * Return whether any of the targets is out-of-date.
1596 */
1597 static bool
main_Run(void)1598 main_Run(void)
1599 {
1600 if (opts.printVars != PVM_NONE) {
1601 /* print the values of any variables requested by the user */
1602 doPrintVars();
1603 return false;
1604 } else {
1605 return runTargets();
1606 }
1607 }
1608
1609 /* Clean up after making the targets. */
1610 static void
main_CleanUp(void)1611 main_CleanUp(void)
1612 {
1613 #ifdef CLEANUP
1614 Lst_DoneCall(&opts.variables, free);
1615 Lst_DoneCall(&opts.makefiles, free);
1616 Lst_DoneCall(&opts.create, free);
1617 #endif
1618
1619 if (DEBUG(GRAPH2))
1620 Targ_PrintGraph(2);
1621
1622 Trace_Log(MAKEEND, NULL);
1623
1624 if (enterFlagObj)
1625 printf("%s: Leaving directory `%s'\n", progname, objdir);
1626 if (opts.enterFlag)
1627 printf("%s: Leaving directory `%s'\n", progname, curdir);
1628
1629 #ifdef USE_META
1630 meta_finish();
1631 #endif
1632 Suff_End();
1633 Targ_End();
1634 Arch_End();
1635 Var_End();
1636 Parse_End();
1637 Dir_End();
1638 Job_End();
1639 Trace_End();
1640 Str_Intern_End();
1641 }
1642
1643 /* Determine the exit code. */
1644 static int
main_Exit(bool outOfDate)1645 main_Exit(bool outOfDate)
1646 {
1647 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0))
1648 return 2; /* Not 1 so -q can distinguish error */
1649 return outOfDate ? 1 : 0;
1650 }
1651
1652 int
main(int argc,char ** argv)1653 main(int argc, char **argv)
1654 {
1655 bool outOfDate;
1656
1657 main_Init(argc, argv);
1658 main_ReadFiles();
1659 main_PrepareMaking();
1660 outOfDate = main_Run();
1661 main_CleanUp();
1662 return main_Exit(outOfDate);
1663 }
1664
1665 /*
1666 * Open and parse the given makefile, with all its side effects.
1667 * Return false if the file could not be opened.
1668 */
1669 static bool
ReadMakefile(const char * fname)1670 ReadMakefile(const char *fname)
1671 {
1672 int fd;
1673 char *name, *path = NULL;
1674
1675 if (strcmp(fname, "-") == 0) {
1676 Parse_File("(stdin)", -1);
1677 Var_Set(SCOPE_INTERNAL, "MAKEFILE", "");
1678 } else {
1679 /* if we've chdir'd, rebuild the path name */
1680 if (strcmp(curdir, objdir) != 0 && *fname != '/') {
1681 path = str_concat3(curdir, "/", fname);
1682 fd = open(path, O_RDONLY);
1683 if (fd != -1) {
1684 fname = path;
1685 goto found;
1686 }
1687 free(path);
1688
1689 /* If curdir failed, try objdir (ala .depend) */
1690 path = str_concat3(objdir, "/", fname);
1691 fd = open(path, O_RDONLY);
1692 if (fd != -1) {
1693 fname = path;
1694 goto found;
1695 }
1696 } else {
1697 fd = open(fname, O_RDONLY);
1698 if (fd != -1)
1699 goto found;
1700 }
1701 /* look in -I and system include directories. */
1702 name = Dir_FindFile(fname, parseIncPath);
1703 if (name == NULL) {
1704 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs)
1705 ? defSysIncPath : sysIncPath;
1706 name = Dir_FindFile(fname, sysInc);
1707 }
1708 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) {
1709 free(name);
1710 free(path);
1711 return false;
1712 }
1713 fname = name;
1714 /*
1715 * set the MAKEFILE variable desired by System V fans -- the
1716 * placement of the setting here means it gets set to the last
1717 * makefile specified, as it is set by SysV make.
1718 */
1719 found:
1720 if (!doing_depend)
1721 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname);
1722 Parse_File(fname, fd);
1723 }
1724 free(path);
1725 return true;
1726 }
1727
1728 /*
1729 * Execute the command in cmd, and return its output (only stdout, not
1730 * stderr, possibly empty). In the output, replace newlines with spaces.
1731 */
1732 char *
Cmd_Exec(const char * cmd,char ** error)1733 Cmd_Exec(const char *cmd, char **error)
1734 {
1735 const char *args[4]; /* Arguments for invoking the shell */
1736 int pipefds[2];
1737 int cpid; /* Child PID */
1738 int pid; /* PID from wait() */
1739 int status; /* command exit status */
1740 Buffer buf; /* buffer to store the result */
1741 ssize_t bytes_read;
1742 char *output;
1743 char *cp;
1744 int saved_errno;
1745
1746 if (shellName == NULL)
1747 Shell_Init();
1748
1749 args[0] = shellName;
1750 args[1] = "-c";
1751 args[2] = cmd;
1752 args[3] = NULL;
1753 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd);
1754
1755 if (pipe(pipefds) == -1) {
1756 *error = str_concat3(
1757 "Couldn't create pipe for \"", cmd, "\"");
1758 return bmake_strdup("");
1759 }
1760
1761 Var_ReexportVars();
1762
1763 switch (cpid = vfork()) {
1764 case 0:
1765 (void)close(pipefds[0]);
1766 (void)dup2(pipefds[1], STDOUT_FILENO);
1767 (void)close(pipefds[1]);
1768
1769 (void)execv(shellPath, UNCONST(args));
1770 _exit(1);
1771 /* NOTREACHED */
1772
1773 case -1:
1774 *error = str_concat3("Couldn't exec \"", cmd, "\"");
1775 return bmake_strdup("");
1776 }
1777
1778 (void)close(pipefds[1]); /* No need for the writing half */
1779
1780 saved_errno = 0;
1781 Buf_Init(&buf);
1782
1783 do {
1784 char result[BUFSIZ];
1785 bytes_read = read(pipefds[0], result, sizeof result);
1786 if (bytes_read > 0)
1787 Buf_AddBytes(&buf, result, (size_t)bytes_read);
1788 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR));
1789 if (bytes_read == -1)
1790 saved_errno = errno;
1791
1792 (void)close(pipefds[0]); /* Close the input side of the pipe. */
1793
1794 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0)
1795 JobReapChild(pid, status, false);
1796
1797 if (Buf_EndsWith(&buf, '\n'))
1798 buf.data[buf.len - 1] = '\0';
1799
1800 output = Buf_DoneData(&buf);
1801 for (cp = output; *cp != '\0'; cp++)
1802 if (*cp == '\n')
1803 *cp = ' ';
1804
1805 if (WIFSIGNALED(status))
1806 *error = str_concat3("\"", cmd, "\" exited on a signal");
1807 else if (WEXITSTATUS(status) != 0)
1808 *error = str_concat3(
1809 "\"", cmd, "\" returned non-zero status");
1810 else if (saved_errno != 0)
1811 *error = str_concat3(
1812 "Couldn't read shell's output for \"", cmd, "\"");
1813 else
1814 *error = NULL;
1815 return output;
1816 }
1817
1818 /*
1819 * Print a printf-style error message.
1820 *
1821 * In default mode, this error message has no consequences, for compatibility
1822 * reasons, in particular it does not affect the exit status. Only in lint
1823 * mode (-dL) it does.
1824 */
1825 void
Error(const char * fmt,...)1826 Error(const char *fmt, ...)
1827 {
1828 va_list ap;
1829 FILE *f;
1830
1831 f = opts.debug_file;
1832 if (f == stdout)
1833 f = stderr;
1834 (void)fflush(stdout);
1835
1836 for (;;) {
1837 fprintf(f, "%s: ", progname);
1838 va_start(ap, fmt);
1839 (void)vfprintf(f, fmt, ap);
1840 va_end(ap);
1841 (void)fprintf(f, "\n");
1842 (void)fflush(f);
1843 if (f == stderr)
1844 break;
1845 f = stderr;
1846 }
1847 main_errors++;
1848 }
1849
1850 /*
1851 * Wait for any running jobs to finish, then produce an error message,
1852 * finally exit immediately.
1853 *
1854 * Exiting immediately differs from Parse_Error, which exits only after the
1855 * current top-level makefile has been parsed completely.
1856 */
1857 void
Fatal(const char * fmt,...)1858 Fatal(const char *fmt, ...)
1859 {
1860 va_list ap;
1861
1862 if (jobsRunning)
1863 Job_Wait();
1864
1865 (void)fflush(stdout);
1866 va_start(ap, fmt);
1867 (void)vfprintf(stderr, fmt, ap);
1868 va_end(ap);
1869 (void)fprintf(stderr, "\n");
1870 (void)fflush(stderr);
1871 PrintStackTrace(true);
1872
1873 PrintOnError(NULL, "\n");
1874
1875 if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1876 Targ_PrintGraph(2);
1877 Trace_Log(MAKEERROR, NULL);
1878 exit(2); /* Not 1 so -q can distinguish error */
1879 }
1880
1881 /*
1882 * Major exception once jobs are being created.
1883 * Kills all jobs, prints a message and exits.
1884 */
1885 void
Punt(const char * fmt,...)1886 Punt(const char *fmt, ...)
1887 {
1888 va_list ap;
1889
1890 (void)fflush(stdout);
1891 (void)fprintf(stderr, "%s: ", progname);
1892 va_start(ap, fmt);
1893 (void)vfprintf(stderr, fmt, ap);
1894 va_end(ap);
1895 (void)fprintf(stderr, "\n");
1896 (void)fflush(stderr);
1897
1898 PrintOnError(NULL, "\n");
1899
1900 DieHorribly();
1901 }
1902
1903 /* Exit without giving a message. */
1904 void
DieHorribly(void)1905 DieHorribly(void)
1906 {
1907 if (jobsRunning)
1908 Job_AbortAll();
1909 if (DEBUG(GRAPH2))
1910 Targ_PrintGraph(2);
1911 Trace_Log(MAKEERROR, NULL);
1912 exit(2); /* Not 1 so -q can distinguish error */
1913 }
1914
1915 /*
1916 * Called when aborting due to errors in child shell to signal abnormal exit.
1917 * The program exits.
1918 * Errors is the number of errors encountered in Make_Make.
1919 */
1920 void
Finish(int errs)1921 Finish(int errs)
1922 {
1923 if (shouldDieQuietly(NULL, -1))
1924 exit(2);
1925 Fatal("%d error%s", errs, errs == 1 ? "" : "s");
1926 }
1927
1928 bool
unlink_file(const char * file)1929 unlink_file(const char *file)
1930 {
1931 struct stat st;
1932
1933 if (lstat(file, &st) == -1)
1934 return false;
1935
1936 if (S_ISDIR(st.st_mode)) {
1937 errno = EISDIR;
1938 return false;
1939 }
1940 return unlink(file) == 0;
1941 }
1942
1943 static void
write_all(int fd,const void * data,size_t n)1944 write_all(int fd, const void *data, size_t n)
1945 {
1946 const char *mem = data;
1947
1948 while (n > 0) {
1949 ssize_t written = write(fd, mem, n);
1950 /* XXX: Should this EAGAIN be EINTR? */
1951 if (written == -1 && errno == EAGAIN)
1952 continue;
1953 if (written == -1)
1954 break;
1955 mem += written;
1956 n -= (size_t)written;
1957 }
1958 }
1959
1960 /* Print why exec failed, avoiding stdio. */
1961 void MAKE_ATTR_DEAD
execDie(const char * af,const char * av)1962 execDie(const char *af, const char *av)
1963 {
1964 Buffer buf;
1965
1966 Buf_Init(&buf);
1967 Buf_AddStr(&buf, progname);
1968 Buf_AddStr(&buf, ": ");
1969 Buf_AddStr(&buf, af);
1970 Buf_AddStr(&buf, "(");
1971 Buf_AddStr(&buf, av);
1972 Buf_AddStr(&buf, ") failed (");
1973 Buf_AddStr(&buf, strerror(errno));
1974 Buf_AddStr(&buf, ")\n");
1975
1976 write_all(STDERR_FILENO, buf.data, buf.len);
1977
1978 Buf_Done(&buf);
1979 _exit(1);
1980 }
1981
1982 static void
purge_relative_cached_realpaths(void)1983 purge_relative_cached_realpaths(void)
1984 {
1985 HashEntry *he, *nhe;
1986 HashIter hi;
1987
1988 HashIter_Init(&hi, &cached_realpaths);
1989 he = HashIter_Next(&hi);
1990 while (he != NULL) {
1991 nhe = HashIter_Next(&hi);
1992 if (he->key[0] != '/') {
1993 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key);
1994 HashTable_DeleteEntry(&cached_realpaths, he);
1995 /*
1996 * XXX: What about the allocated he->value? Either
1997 * free them or document why they cannot be freed.
1998 */
1999 }
2000 he = nhe;
2001 }
2002 }
2003
2004 const char *
cached_realpath(const char * pathname,char * resolved)2005 cached_realpath(const char *pathname, char *resolved)
2006 {
2007 const char *rp;
2008
2009 if (pathname == NULL || pathname[0] == '\0')
2010 return NULL;
2011
2012 rp = HashTable_FindValue(&cached_realpaths, pathname);
2013 if (rp != NULL) {
2014 /* a hit */
2015 strncpy(resolved, rp, MAXPATHLEN);
2016 resolved[MAXPATHLEN - 1] = '\0';
2017 return resolved;
2018 }
2019
2020 rp = realpath(pathname, resolved);
2021 if (rp != NULL) {
2022 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp));
2023 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp);
2024 return resolved;
2025 }
2026
2027 /* should we negative-cache? */
2028 return NULL;
2029 }
2030
2031 /*
2032 * Return true if we should die without noise.
2033 * For example our failing child was a sub-make or failure happened elsewhere.
2034 */
2035 bool
shouldDieQuietly(GNode * gn,int bf)2036 shouldDieQuietly(GNode *gn, int bf)
2037 {
2038 static int quietly = -1;
2039
2040 if (quietly < 0) {
2041 if (DEBUG(JOB) ||
2042 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true))
2043 quietly = 0;
2044 else if (bf >= 0)
2045 quietly = bf;
2046 else
2047 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0;
2048 }
2049 return quietly != 0;
2050 }
2051
2052 static void
SetErrorVars(GNode * gn)2053 SetErrorVars(GNode *gn)
2054 {
2055 StringListNode *ln;
2056
2057 /*
2058 * We can print this even if there is no .ERROR target.
2059 */
2060 Global_Set(".ERROR_TARGET", gn->name);
2061 Global_Delete(".ERROR_CMD");
2062
2063 for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
2064 const char *cmd = ln->datum;
2065
2066 if (cmd == NULL)
2067 break;
2068 Global_Append(".ERROR_CMD", cmd);
2069 }
2070 }
2071
2072 /*
2073 * Print some helpful information in case of an error.
2074 * The caller should exit soon after calling this function.
2075 */
2076 void
PrintOnError(GNode * gn,const char * msg)2077 PrintOnError(GNode *gn, const char *msg)
2078 {
2079 static GNode *errorNode = NULL;
2080
2081 if (DEBUG(HASH)) {
2082 Targ_Stats();
2083 Var_Stats();
2084 }
2085
2086 if (errorNode != NULL)
2087 return; /* we've been here! */
2088
2089 printf("%s%s: stopped in %s\n", msg, progname, curdir);
2090
2091 /* we generally want to keep quiet if a sub-make died */
2092 if (shouldDieQuietly(gn, -1))
2093 return;
2094
2095 if (gn != NULL)
2096 SetErrorVars(gn);
2097
2098 {
2099 char *errorVarsValues;
2100 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
2101 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues);
2102 /* TODO: handle errors */
2103 printf("%s", errorVarsValues);
2104 free(errorVarsValues);
2105 }
2106
2107 fflush(stdout);
2108
2109 /*
2110 * Finally, see if there is a .ERROR target, and run it if so.
2111 */
2112 errorNode = Targ_FindNode(".ERROR");
2113 if (errorNode != NULL) {
2114 errorNode->type |= OP_SPECIAL;
2115 Compat_Make(errorNode, errorNode);
2116 }
2117 }
2118
2119 void
Main_ExportMAKEFLAGS(bool first)2120 Main_ExportMAKEFLAGS(bool first)
2121 {
2122 static bool once = true;
2123 char *flags;
2124
2125 if (once != first)
2126 return;
2127 once = false;
2128
2129 (void)Var_Subst(
2130 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
2131 SCOPE_CMDLINE, VARE_WANTRES, &flags);
2132 /* TODO: handle errors */
2133 if (flags[0] != '\0') {
2134 #ifdef POSIX
2135 setenv("MAKEFLAGS", flags, 1);
2136 #else
2137 setenv("MAKE", flags, 1);
2138 #endif
2139 }
2140 }
2141
2142 char *
getTmpdir(void)2143 getTmpdir(void)
2144 {
2145 static char *tmpdir = NULL;
2146 struct stat st;
2147
2148 if (tmpdir != NULL)
2149 return tmpdir;
2150
2151 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */
2152 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/",
2153 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir);
2154 /* TODO: handle errors */
2155
2156 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2157 free(tmpdir);
2158 tmpdir = bmake_strdup(_PATH_TMP);
2159 }
2160 return tmpdir;
2161 }
2162
2163 /*
2164 * Create and open a temp file using "pattern".
2165 * If out_fname is provided, set it to a copy of the filename created.
2166 * Otherwise unlink the file once open.
2167 */
2168 int
mkTempFile(const char * pattern,char * tfile,size_t tfile_sz)2169 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz)
2170 {
2171 static char *tmpdir = NULL;
2172 char tbuf[MAXPATHLEN];
2173 int fd;
2174
2175 if (pattern == NULL)
2176 pattern = TMPPAT;
2177 if (tmpdir == NULL)
2178 tmpdir = getTmpdir();
2179 if (tfile == NULL) {
2180 tfile = tbuf;
2181 tfile_sz = sizeof tbuf;
2182 }
2183
2184 if (pattern[0] == '/')
2185 snprintf(tfile, tfile_sz, "%s", pattern);
2186 else
2187 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern);
2188
2189 if ((fd = mkstemp(tfile)) < 0)
2190 Punt("Could not create temporary file %s: %s", tfile,
2191 strerror(errno));
2192 if (tfile == tbuf)
2193 unlink(tfile); /* we just want the descriptor */
2194
2195 return fd;
2196 }
2197
2198 /*
2199 * Convert a string representation of a boolean into a boolean value.
2200 * Anything that looks like "No", "False", "Off", "0" etc. is false,
2201 * the empty string is the fallback, everything else is true.
2202 */
2203 bool
ParseBoolean(const char * s,bool fallback)2204 ParseBoolean(const char *s, bool fallback)
2205 {
2206 char ch = ch_tolower(s[0]);
2207 if (ch == '\0')
2208 return fallback;
2209 if (ch == '0' || ch == 'f' || ch == 'n')
2210 return false;
2211 if (ch == 'o')
2212 return ch_tolower(s[1]) != 'f';
2213 return true;
2214 }
2215