1 /* $NetBSD: main.c,v 1.593 2023/03/28 14:39:31 rillig Exp $ */
2
3 /*
4 * Copyright (c) 1988, 1989, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Adam de Boor.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 /*
36 * Copyright (c) 1989 by Berkeley Softworks
37 * All rights reserved.
38 *
39 * This code is derived from software contributed to Berkeley by
40 * Adam de Boor.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. All advertising materials mentioning features or use of this software
51 * must display the following acknowledgement:
52 * This product includes software developed by the University of
53 * California, Berkeley and its contributors.
54 * 4. Neither the name of the University nor the names of its contributors
55 * may be used to endorse or promote products derived from this software
56 * without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * SUCH DAMAGE.
69 */
70
71 /*
72 * The main file for this entire program. Exit routines etc. reside here.
73 *
74 * Utility functions defined in this file:
75 *
76 * Main_ParseArgLine
77 * Parse and process command line arguments from a
78 * single string. Used to implement the special targets
79 * .MFLAGS and .MAKEFLAGS.
80 *
81 * Error Print a tagged error message.
82 *
83 * Fatal Print an error message and exit.
84 *
85 * Punt Abort all jobs and exit with a message.
86 *
87 * Finish Finish things up by printing the number of errors
88 * that occurred, and exit.
89 */
90
91 #include <sys/types.h>
92 #include <sys/time.h>
93 #include <sys/param.h>
94 #include <sys/resource.h>
95 #include <sys/stat.h>
96 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL)
97 #include <sys/sysctl.h>
98 #endif
99 #include <sys/utsname.h>
100 #include "wait.h"
101
102 #include <errno.h>
103 #include <signal.h>
104 #include <stdarg.h>
105 #include <time.h>
106
107 #include "make.h"
108 #include "dir.h"
109 #include "job.h"
110 #include "pathnames.h"
111 #include "trace.h"
112
113 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */
114 MAKE_RCSID("$NetBSD: main.c,v 1.593 2023/03/28 14:39:31 rillig Exp $");
115 #if defined(MAKE_NATIVE) && !defined(lint)
116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 "
117 "The Regents of the University of California. "
118 "All rights reserved.");
119 #endif
120
121 #ifndef __arraycount
122 # define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
123 #endif
124
125 CmdOpts opts;
126 time_t now; /* Time at start of make */
127 GNode *defaultNode; /* .DEFAULT node */
128 bool allPrecious; /* .PRECIOUS given on line by itself */
129 bool deleteOnError; /* .DELETE_ON_ERROR: set */
130
131 static int maxJobTokens; /* -j argument */
132 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",
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 Dir_SetSYSPATH();
436 }
437
438 static bool
MainParseOption(char c,const char * argvalue)439 MainParseOption(char c, const char *argvalue)
440 {
441 switch (c) {
442 case '\0':
443 break;
444 case 'B':
445 opts.compatMake = true;
446 Global_Append(MAKEFLAGS, "-B");
447 Global_Set(".MAKE.MODE", "compat");
448 break;
449 case 'C':
450 MainParseArgChdir(argvalue);
451 break;
452 case 'D':
453 if (argvalue[0] == '\0')
454 return false;
455 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1");
456 Global_Append(MAKEFLAGS, "-D");
457 Global_Append(MAKEFLAGS, argvalue);
458 break;
459 case 'I':
460 Parse_AddIncludeDir(argvalue);
461 Global_Append(MAKEFLAGS, "-I");
462 Global_Append(MAKEFLAGS, argvalue);
463 break;
464 case 'J':
465 MainParseArgJobsInternal(argvalue);
466 break;
467 case 'N':
468 opts.noExecute = true;
469 opts.noRecursiveExecute = true;
470 Global_Append(MAKEFLAGS, "-N");
471 break;
472 case 'S':
473 opts.keepgoing = false;
474 Global_Append(MAKEFLAGS, "-S");
475 break;
476 case 'T':
477 tracefile = bmake_strdup(argvalue);
478 Global_Append(MAKEFLAGS, "-T");
479 Global_Append(MAKEFLAGS, argvalue);
480 break;
481 case 'V':
482 case 'v':
483 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED;
484 Lst_Append(&opts.variables, bmake_strdup(argvalue));
485 /* XXX: Why always -V? */
486 Global_Append(MAKEFLAGS, "-V");
487 Global_Append(MAKEFLAGS, argvalue);
488 break;
489 case 'W':
490 opts.parseWarnFatal = true;
491 /* XXX: why no Global_Append? */
492 break;
493 case 'X':
494 opts.varNoExportEnv = true;
495 Global_Append(MAKEFLAGS, "-X");
496 break;
497 case 'd':
498 /* If '-d-opts' don't pass to children */
499 if (argvalue[0] == '-')
500 argvalue++;
501 else {
502 Global_Append(MAKEFLAGS, "-d");
503 Global_Append(MAKEFLAGS, argvalue);
504 }
505 MainParseArgDebug(argvalue);
506 break;
507 case 'e':
508 opts.checkEnvFirst = true;
509 Global_Append(MAKEFLAGS, "-e");
510 break;
511 case 'f':
512 Lst_Append(&opts.makefiles, bmake_strdup(argvalue));
513 break;
514 case 'i':
515 opts.ignoreErrors = true;
516 Global_Append(MAKEFLAGS, "-i");
517 break;
518 case 'j':
519 MainParseArgJobs(argvalue);
520 break;
521 case 'k':
522 opts.keepgoing = true;
523 Global_Append(MAKEFLAGS, "-k");
524 break;
525 case 'm':
526 MainParseArgSysInc(argvalue);
527 /* XXX: why no Var_Append? */
528 break;
529 case 'n':
530 opts.noExecute = true;
531 Global_Append(MAKEFLAGS, "-n");
532 break;
533 case 'q':
534 opts.query = true;
535 /* Kind of nonsensical, wot? */
536 Global_Append(MAKEFLAGS, "-q");
537 break;
538 case 'r':
539 opts.noBuiltins = true;
540 Global_Append(MAKEFLAGS, "-r");
541 break;
542 case 's':
543 opts.silent = true;
544 Global_Append(MAKEFLAGS, "-s");
545 break;
546 case 't':
547 opts.touch = true;
548 Global_Append(MAKEFLAGS, "-t");
549 break;
550 case 'w':
551 opts.enterFlag = true;
552 Global_Append(MAKEFLAGS, "-w");
553 break;
554 default:
555 usage();
556 }
557 return true;
558 }
559
560 /*
561 * Parse the given arguments. Called from main() and from
562 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
563 *
564 * The arguments must be treated as read-only and will be freed after the
565 * call.
566 *
567 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
568 */
569 static void
MainParseArgs(int argc,char ** argv)570 MainParseArgs(int argc, char **argv)
571 {
572 char c;
573 int arginc;
574 char *argvalue;
575 char *optscan;
576 bool inOption, dashDash = false;
577
578 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w";
579 /* Can't actually use getopt(3) because rescanning is not portable */
580
581 rearg:
582 inOption = false;
583 optscan = NULL;
584 while (argc > 1) {
585 const char *optspec;
586 if (!inOption)
587 optscan = argv[1];
588 c = *optscan++;
589 arginc = 0;
590 if (inOption) {
591 if (c == '\0') {
592 argv++;
593 argc--;
594 inOption = false;
595 continue;
596 }
597 } else {
598 if (c != '-' || dashDash)
599 break;
600 inOption = true;
601 c = *optscan++;
602 }
603 /* '-' found at some earlier point */
604 optspec = strchr(optspecs, c);
605 if (c != '\0' && optspec != NULL && optspec[1] == ':') {
606 /*
607 * -<something> found, and <something> should have an
608 * argument
609 */
610 inOption = false;
611 arginc = 1;
612 argvalue = optscan;
613 if (*argvalue == '\0') {
614 if (argc < 3)
615 goto noarg;
616 argvalue = argv[2];
617 arginc = 2;
618 }
619 } else {
620 argvalue = NULL;
621 }
622 switch (c) {
623 case '\0':
624 arginc = 1;
625 inOption = false;
626 break;
627 case '-':
628 dashDash = true;
629 break;
630 default:
631 if (!MainParseOption(c, argvalue))
632 goto noarg;
633 }
634 argv += arginc;
635 argc -= arginc;
636 }
637
638 /*
639 * See if the rest of the arguments are variable assignments and
640 * perform them if so. Else take them to be targets and stuff them
641 * on the end of the "create" list.
642 */
643 for (; argc > 1; argv++, argc--) {
644 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) {
645 if (argv[1][0] == '\0')
646 Punt("illegal (null) argument.");
647 if (argv[1][0] == '-' && !dashDash)
648 goto rearg;
649 Lst_Append(&opts.create, bmake_strdup(argv[1]));
650 }
651 }
652
653 return;
654 noarg:
655 (void)fprintf(stderr, "%s: option requires an argument -- %c\n",
656 progname, c);
657 usage();
658 }
659
660 /*
661 * Break a line of arguments into words and parse them.
662 *
663 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and
664 * by main() when reading the MAKEFLAGS environment variable.
665 */
666 void
Main_ParseArgLine(const char * line)667 Main_ParseArgLine(const char *line)
668 {
669 Words words;
670 char *buf;
671
672 if (line == NULL)
673 return;
674 /* XXX: don't use line as an iterator variable */
675 for (; *line == ' '; line++)
676 continue;
677 if (line[0] == '\0')
678 return;
679
680 #ifndef POSIX
681 {
682 /*
683 * $MAKE may simply be naming the make(1) binary
684 */
685 char *cp;
686
687 if (!(cp = strrchr(line, '/')))
688 cp = line;
689 if ((cp = strstr(cp, "make")) &&
690 strcmp(cp, "make") == 0)
691 return;
692 }
693 #endif
694 {
695 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE");
696 buf = str_concat3(argv0.str, " ", line);
697 FStr_Done(&argv0);
698 }
699
700 words = Str_Words(buf, true);
701 if (words.words == NULL) {
702 Error("Unterminated quoted string [%s]", buf);
703 free(buf);
704 return;
705 }
706 free(buf);
707 MainParseArgs((int)words.len, words.words);
708
709 Words_Free(words);
710 }
711
712 bool
Main_SetObjdir(bool writable,const char * fmt,...)713 Main_SetObjdir(bool writable, const char *fmt, ...)
714 {
715 struct stat sb;
716 char *path;
717 char buf[MAXPATHLEN + 1];
718 char buf2[MAXPATHLEN + 1];
719 va_list ap;
720
721 va_start(ap, fmt);
722 vsnprintf(path = buf, MAXPATHLEN, fmt, ap);
723 va_end(ap);
724
725 if (path[0] != '/') {
726 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN)
727 path = buf2;
728 else
729 return false;
730 }
731
732 /* look for the directory and try to chdir there */
733 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode))
734 return false;
735
736 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) {
737 (void)fprintf(stderr, "%s: warning: %s: %s.\n",
738 progname, path, strerror(errno));
739 return false;
740 }
741
742 snprintf(objdir, sizeof objdir, "%s", path);
743 Global_Set(".OBJDIR", objdir);
744 setenv("PWD", objdir, 1);
745 Dir_InitDot();
746 purge_relative_cached_realpaths();
747 if (opts.enterFlag && strcmp(objdir, curdir) != 0)
748 enterFlagObj = true;
749 return true;
750 }
751
752 static bool
SetVarObjdir(bool writable,const char * var,const char * suffix)753 SetVarObjdir(bool writable, const char *var, const char *suffix)
754 {
755 FStr path = Var_Value(SCOPE_CMDLINE, var);
756
757 if (path.str == NULL || path.str[0] == '\0') {
758 FStr_Done(&path);
759 return false;
760 }
761
762 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES);
763
764 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix);
765
766 FStr_Done(&path);
767 return true;
768 }
769
770 /*
771 * Splits str into words, adding them to the list.
772 * The string must be kept alive as long as the list.
773 */
774 int
str2Lst_Append(StringList * lp,char * str)775 str2Lst_Append(StringList *lp, char *str)
776 {
777 char *cp;
778 int n;
779
780 const char *sep = " \t";
781
782 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) {
783 Lst_Append(lp, cp);
784 n++;
785 }
786 return n;
787 }
788
789 #ifdef SIGINFO
790 /*ARGSUSED*/
791 static void
siginfo(int signo MAKE_ATTR_UNUSED)792 siginfo(int signo MAKE_ATTR_UNUSED)
793 {
794 char dir[MAXPATHLEN];
795 char str[2 * MAXPATHLEN];
796 int len;
797 if (getcwd(dir, sizeof dir) == NULL)
798 return;
799 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir);
800 if (len > 0)
801 (void)write(STDERR_FILENO, str, (size_t)len);
802 }
803 #endif
804
805 /* Allow makefiles some control over the mode we run in. */
806 static void
MakeMode(void)807 MakeMode(void)
808 {
809 char *mode = Var_Subst("${.MAKE.MODE:tl}",
810 SCOPE_GLOBAL, VARE_WANTRES);
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, '$') != NULL) {
833 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES);
834 /* TODO: handle errors */
835 printf("%s\n", evalue);
836 free(evalue);
837
838 } else if (expandVars) {
839 char *expr = str_concat3("${", varname, "}");
840 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES);
841 /* TODO: handle errors */
842 free(expr);
843 printf("%s\n", evalue);
844 free(evalue);
845
846 } else {
847 FStr value = Var_Value(SCOPE_GLOBAL, varname);
848 printf("%s\n", value.str != NULL ? value.str : "");
849 FStr_Done(&value);
850 }
851 }
852
853 /*
854 * Return a bool based on a variable.
855 *
856 * If the knob is not set, return the fallback.
857 * If set, anything that looks or smells like "No", "False", "Off", "0", etc.
858 * is false, otherwise true.
859 */
860 bool
GetBooleanExpr(const char * expr,bool fallback)861 GetBooleanExpr(const char *expr, bool fallback)
862 {
863 char *value;
864 bool res;
865
866 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES);
867 /* TODO: handle errors */
868 res = ParseBoolean(value, fallback);
869 free(value);
870 return res;
871 }
872
873 static void
doPrintVars(void)874 doPrintVars(void)
875 {
876 StringListNode *ln;
877 bool expandVars;
878
879 if (opts.printVars == PVM_EXPANDED)
880 expandVars = true;
881 else if (opts.debugVflag)
882 expandVars = false;
883 else
884 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}",
885 false);
886
887 for (ln = opts.variables.first; ln != NULL; ln = ln->next) {
888 const char *varname = ln->datum;
889 PrintVar(varname, expandVars);
890 }
891 }
892
893 static bool
runTargets(void)894 runTargets(void)
895 {
896 GNodeList targs = LST_INIT; /* target nodes to create */
897 bool outOfDate; /* false if all targets up to date */
898
899 /*
900 * Have now read the entire graph and need to make a list of
901 * targets to create. If none was given on the command line,
902 * we consult the parsing module to find the main target(s)
903 * to create.
904 */
905 if (Lst_IsEmpty(&opts.create))
906 Parse_MainName(&targs);
907 else
908 Targ_FindList(&targs, &opts.create);
909
910 if (!opts.compatMake) {
911 /*
912 * Initialize job module before traversing the graph
913 * now that any .BEGIN and .END targets have been read.
914 * This is done only if the -q flag wasn't given
915 * (to prevent the .BEGIN from being executed should
916 * it exist).
917 */
918 if (!opts.query) {
919 Job_Init();
920 jobsRunning = true;
921 }
922
923 /* Traverse the graph, checking on all the targets */
924 outOfDate = Make_Run(&targs);
925 } else {
926 Compat_MakeAll(&targs);
927 outOfDate = false;
928 }
929 Lst_Done(&targs); /* Don't free the targets themselves. */
930 return outOfDate;
931 }
932
933 /*
934 * Set up the .TARGETS variable to contain the list of targets to be created.
935 * If none specified, make the variable empty for now, the parser will fill
936 * in the default or .MAIN target later.
937 */
938 static void
InitVarTargets(void)939 InitVarTargets(void)
940 {
941 StringListNode *ln;
942
943 if (Lst_IsEmpty(&opts.create)) {
944 Global_Set(".TARGETS", "");
945 return;
946 }
947
948 for (ln = opts.create.first; ln != NULL; ln = ln->next) {
949 const char *name = ln->datum;
950 Global_Append(".TARGETS", name);
951 }
952 }
953
954 static void
InitRandom(void)955 InitRandom(void)
956 {
957 struct timeval tv;
958
959 gettimeofday(&tv, NULL);
960 srandom((unsigned int)(tv.tv_sec + tv.tv_usec));
961 }
962
963 static const char *
InitVarMachine(const struct utsname * utsname MAKE_ATTR_UNUSED)964 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED)
965 {
966 #ifdef FORCE_MACHINE
967 return FORCE_MACHINE;
968 #else
969 const char *machine = getenv("MACHINE");
970
971 if (machine != NULL)
972 return machine;
973
974 #if defined(MAKE_NATIVE)
975 return utsname->machine;
976 #elif defined(MAKE_MACHINE)
977 return MAKE_MACHINE;
978 #else
979 return "unknown";
980 #endif
981 #endif
982 }
983
984 static const char *
InitVarMachineArch(void)985 InitVarMachineArch(void)
986 {
987 #ifdef FORCE_MACHINE_ARCH
988 return FORCE_MACHINE_ARCH;
989 #else
990 const char *env = getenv("MACHINE_ARCH");
991 if (env != NULL)
992 return env;
993
994 #if defined(MAKE_NATIVE) && defined(CTL_HW)
995 {
996 struct utsname utsname;
997 static char machine_arch_buf[sizeof utsname.machine];
998 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
999 size_t len = sizeof machine_arch_buf;
1000
1001 if (sysctl(mib, (unsigned int)__arraycount(mib),
1002 machine_arch_buf, &len, NULL, 0) < 0) {
1003 (void)fprintf(stderr, "%s: sysctl failed (%s).\n",
1004 progname, strerror(errno));
1005 exit(2);
1006 }
1007
1008 return machine_arch_buf;
1009 }
1010 #elif defined(MACHINE_ARCH)
1011 return MACHINE_ARCH;
1012 #elif defined(MAKE_MACHINE_ARCH)
1013 return MAKE_MACHINE_ARCH;
1014 #else
1015 return "unknown";
1016 #endif
1017 #endif
1018 }
1019
1020 #ifndef NO_PWD_OVERRIDE
1021 /*
1022 * All this code is so that we know where we are when we start up
1023 * on a different machine with pmake.
1024 *
1025 * XXX: Make no longer has "local" and "remote" mode. Is this code still
1026 * necessary?
1027 *
1028 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1029 * since the value of curdir can vary depending on how we got
1030 * here. Ie sitting at a shell prompt (shell that provides $PWD)
1031 * or via subdir.mk in which case its likely a shell which does
1032 * not provide it.
1033 *
1034 * So, to stop it breaking this case only, we ignore PWD if
1035 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression.
1036 */
1037 static void
HandlePWD(const struct stat * curdir_st)1038 HandlePWD(const struct stat *curdir_st)
1039 {
1040 char *pwd;
1041 FStr makeobjdir;
1042 struct stat pwd_st;
1043
1044 if (ignorePWD || (pwd = getenv("PWD")) == NULL)
1045 return;
1046
1047 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"))
1048 return;
1049
1050 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR");
1051 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL)
1052 goto ignore_pwd;
1053
1054 if (stat(pwd, &pwd_st) == 0 &&
1055 curdir_st->st_ino == pwd_st.st_ino &&
1056 curdir_st->st_dev == pwd_st.st_dev)
1057 (void)strncpy(curdir, pwd, MAXPATHLEN);
1058
1059 ignore_pwd:
1060 FStr_Done(&makeobjdir);
1061 }
1062 #endif
1063
1064 /*
1065 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set
1066 * in the environment, try only that value and fall back to .CURDIR if it
1067 * does not exist.
1068 *
1069 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
1070 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these
1071 * paths exist, just use .CURDIR.
1072 */
1073 static void
InitObjdir(const char * machine,const char * machine_arch)1074 InitObjdir(const char *machine, const char *machine_arch)
1075 {
1076 bool writable;
1077
1078 Dir_InitCur(curdir);
1079 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true);
1080 (void)Main_SetObjdir(false, "%s", curdir);
1081
1082 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) &&
1083 !SetVarObjdir(writable, "MAKEOBJDIR", "") &&
1084 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
1085 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) &&
1086 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR))
1087 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir);
1088 }
1089
1090 /* get rid of resource limit on file descriptors */
1091 static void
UnlimitFiles(void)1092 UnlimitFiles(void)
1093 {
1094 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
1095 struct rlimit rl;
1096 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
1097 rl.rlim_cur != rl.rlim_max) {
1098 #ifdef BMAKE_NOFILE_MAX
1099 if (BMAKE_NOFILE_MAX < rl.rlim_max)
1100 rl.rlim_cur = BMAKE_NOFILE_MAX;
1101 else
1102 #endif
1103 rl.rlim_cur = rl.rlim_max;
1104 (void)setrlimit(RLIMIT_NOFILE, &rl);
1105 }
1106 #endif
1107 }
1108
1109 static void
CmdOpts_Init(void)1110 CmdOpts_Init(void)
1111 {
1112 opts.compatMake = false;
1113 memset(&opts.debug, 0, sizeof(opts.debug));
1114 /* opts.debug_file has already been initialized earlier */
1115 opts.strict = false;
1116 opts.debugVflag = false;
1117 opts.checkEnvFirst = false;
1118 Lst_Init(&opts.makefiles);
1119 opts.ignoreErrors = false; /* Pay attention to non-zero returns */
1120 opts.maxJobs = 1;
1121 opts.keepgoing = false; /* Stop on error */
1122 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */
1123 opts.noExecute = false; /* Execute all commands */
1124 opts.query = false;
1125 opts.noBuiltins = false; /* Read the built-in rules */
1126 opts.silent = false; /* Print commands as executed */
1127 opts.touch = false;
1128 opts.printVars = PVM_NONE;
1129 Lst_Init(&opts.variables);
1130 opts.parseWarnFatal = false;
1131 opts.enterFlag = false;
1132 opts.varNoExportEnv = false;
1133 Lst_Init(&opts.create);
1134 }
1135
1136 /*
1137 * Initialize MAKE and .MAKE to the path of the executable, so that it can be
1138 * found by execvp(3) and the shells, even after a chdir.
1139 *
1140 * If it's a relative path and contains a '/', resolve it to an absolute path.
1141 * Otherwise keep it as is, assuming it will be found in the PATH.
1142 */
1143 static void
InitVarMake(const char * argv0)1144 InitVarMake(const char *argv0)
1145 {
1146 const char *make = argv0;
1147
1148 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) {
1149 char pathbuf[MAXPATHLEN];
1150 const char *abspath = cached_realpath(argv0, pathbuf);
1151 struct stat st;
1152 if (abspath != NULL && abspath[0] == '/' &&
1153 stat(make, &st) == 0)
1154 make = abspath;
1155 }
1156
1157 Global_Set("MAKE", make);
1158 Global_Set(".MAKE", make);
1159 }
1160
1161 /*
1162 * Add the directories from the colon-separated syspath to defSysIncPath.
1163 * After returning, the contents of syspath is unspecified.
1164 */
1165 static void
InitDefSysIncPath(char * syspath)1166 InitDefSysIncPath(char *syspath)
1167 {
1168 static char defsyspath[] = _PATH_DEFSYSPATH;
1169 char *start, *cp;
1170
1171 /*
1172 * If no user-supplied system path was given (through the -m option)
1173 * add the directories from the DEFSYSPATH (more than one may be given
1174 * as dir1:...:dirn) to the system include path.
1175 */
1176 if (syspath == NULL || syspath[0] == '\0')
1177 syspath = defsyspath;
1178 else
1179 syspath = bmake_strdup(syspath);
1180
1181 for (start = syspath; *start != '\0'; start = cp) {
1182 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
1183 continue;
1184 if (*cp == ':')
1185 *cp++ = '\0';
1186
1187 /* look for magic parent directory search string */
1188 if (strncmp(start, ".../", 4) == 0) {
1189 char *dir = Dir_FindHereOrAbove(curdir, start + 4);
1190 if (dir != NULL) {
1191 (void)SearchPath_Add(defSysIncPath, dir);
1192 free(dir);
1193 }
1194 } else {
1195 (void)SearchPath_Add(defSysIncPath, start);
1196 }
1197 }
1198
1199 if (syspath != defsyspath)
1200 free(syspath);
1201 }
1202
1203 static void
ReadBuiltinRules(void)1204 ReadBuiltinRules(void)
1205 {
1206 StringListNode *ln;
1207 StringList sysMkFiles = LST_INIT;
1208
1209 SearchPath_Expand(
1210 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath,
1211 _PATH_DEFSYSMK,
1212 &sysMkFiles);
1213 if (Lst_IsEmpty(&sysMkFiles))
1214 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK);
1215
1216 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next)
1217 if (ReadMakefile(ln->datum))
1218 break;
1219
1220 if (ln == NULL)
1221 Fatal("%s: cannot open %s.",
1222 progname, (const char *)sysMkFiles.first->datum);
1223
1224 Lst_DoneCall(&sysMkFiles, free);
1225 }
1226
1227 static void
InitMaxJobs(void)1228 InitMaxJobs(void)
1229 {
1230 char *value;
1231 int n;
1232
1233 if (forceJobs || opts.compatMake ||
1234 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS"))
1235 return;
1236
1237 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES);
1238 /* TODO: handle errors */
1239 n = (int)strtol(value, NULL, 0);
1240 if (n < 1) {
1241 (void)fprintf(stderr,
1242 "%s: illegal value for .MAKE.JOBS "
1243 "-- must be positive integer!\n",
1244 progname);
1245 exit(2); /* Not 1 so -q can distinguish error */
1246 }
1247
1248 if (n != opts.maxJobs) {
1249 Global_Append(MAKEFLAGS, "-j");
1250 Global_Append(MAKEFLAGS, value);
1251 }
1252
1253 opts.maxJobs = n;
1254 maxJobTokens = opts.maxJobs;
1255 forceJobs = true;
1256 free(value);
1257 }
1258
1259 /*
1260 * For compatibility, look at the directories in the VPATH variable
1261 * and add them to the search path, if the variable is defined. The
1262 * variable's value is in the same format as the PATH environment
1263 * variable, i.e. <directory>:<directory>:<directory>...
1264 */
1265 static void
InitVpath(void)1266 InitVpath(void)
1267 {
1268 char *vpath, savec, *path;
1269 if (!Var_Exists(SCOPE_CMDLINE, "VPATH"))
1270 return;
1271
1272 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES);
1273 /* TODO: handle errors */
1274 path = vpath;
1275 do {
1276 char *cp;
1277 /* skip to end of directory */
1278 for (cp = path; *cp != ':' && *cp != '\0'; cp++)
1279 continue;
1280 /* Save terminator character so know when to stop */
1281 savec = *cp;
1282 *cp = '\0';
1283 /* Add directory to search path */
1284 (void)SearchPath_Add(&dirSearchPath, path);
1285 *cp = savec;
1286 path = cp + 1;
1287 } while (savec == ':');
1288 free(vpath);
1289 }
1290
1291 static void
ReadAllMakefiles(const StringList * makefiles)1292 ReadAllMakefiles(const StringList *makefiles)
1293 {
1294 StringListNode *ln;
1295
1296 for (ln = makefiles->first; ln != NULL; ln = ln->next) {
1297 const char *fname = ln->datum;
1298 if (!ReadMakefile(fname))
1299 Fatal("%s: cannot open %s.", progname, fname);
1300 }
1301 }
1302
1303 static void
ReadFirstDefaultMakefile(void)1304 ReadFirstDefaultMakefile(void)
1305 {
1306 StringList makefiles = LST_INIT;
1307 StringListNode *ln;
1308 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}",
1309 SCOPE_CMDLINE, VARE_WANTRES);
1310 /* TODO: handle errors */
1311
1312 (void)str2Lst_Append(&makefiles, prefs);
1313
1314 for (ln = makefiles.first; ln != NULL; ln = ln->next)
1315 if (ReadMakefile(ln->datum))
1316 break;
1317
1318 Lst_Done(&makefiles);
1319 free(prefs);
1320 }
1321
1322 /*
1323 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS.
1324 * Initialize a few modules.
1325 * Parse the arguments from MAKEFLAGS and the command line.
1326 */
1327 static void
main_Init(int argc,char ** argv)1328 main_Init(int argc, char **argv)
1329 {
1330 struct stat sa;
1331 const char *machine;
1332 const char *machine_arch;
1333 char *syspath = getenv("MAKESYSPATH");
1334 struct utsname utsname;
1335
1336 /* default to writing debug to stderr */
1337 opts.debug_file = stderr;
1338
1339 Str_Intern_Init();
1340 HashTable_Init(&cached_realpaths);
1341
1342 #ifdef SIGINFO
1343 (void)bmake_signal(SIGINFO, siginfo);
1344 #endif
1345
1346 InitRandom();
1347
1348 progname = str_basename(argv[0]);
1349
1350 UnlimitFiles();
1351
1352 if (uname(&utsname) == -1) {
1353 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
1354 strerror(errno));
1355 exit(2);
1356 }
1357
1358 /*
1359 * Get the name of this type of MACHINE from utsname
1360 * so we can share an executable for similar machines.
1361 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
1362 *
1363 * Note that both MACHINE and MACHINE_ARCH are decided at
1364 * run-time.
1365 */
1366 machine = InitVarMachine(&utsname);
1367 machine_arch = InitVarMachineArch();
1368
1369 myPid = getpid(); /* remember this for vFork() */
1370
1371 /*
1372 * Just in case MAKEOBJDIR wants us to do something tricky.
1373 */
1374 Targ_Init();
1375 Var_Init();
1376 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname);
1377 Global_Set("MACHINE", machine);
1378 Global_Set("MACHINE_ARCH", machine_arch);
1379 #ifdef MAKE_VERSION
1380 Global_Set("MAKE_VERSION", MAKE_VERSION);
1381 #endif
1382 Global_Set_ReadOnly(".newline", "\n"); /* handy for :@ loops */
1383 #ifndef MAKEFILE_PREFERENCE_LIST
1384 /* This is the traditional preference for makefiles. */
1385 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
1386 #endif
1387 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST);
1388 Global_Set(".MAKE.DEPENDFILE", ".depend");
1389
1390 CmdOpts_Init();
1391 allPrecious = false; /* Remove targets when interrupted */
1392 deleteOnError = false; /* Historical default behavior */
1393 jobsRunning = false;
1394
1395 maxJobTokens = opts.maxJobs;
1396 ignorePWD = false;
1397
1398 /*
1399 * Initialize the parsing, directory and variable modules to prepare
1400 * for the reading of inclusion paths and variable settings on the
1401 * command line
1402 */
1403
1404 /*
1405 * Initialize various variables.
1406 * MAKE also gets this name, for compatibility
1407 * .MAKEFLAGS gets set to the empty string just in case.
1408 * MFLAGS also gets initialized empty, for compatibility.
1409 */
1410 Parse_Init();
1411 InitVarMake(argv[0]);
1412 Global_Set(MAKEFLAGS, "");
1413 Global_Set(".MAKEOVERRIDES", "");
1414 Global_Set("MFLAGS", "");
1415 Global_Set(".ALLTARGETS", "");
1416 Var_Set(SCOPE_CMDLINE, ".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV);
1417
1418 /* Set some other useful variables. */
1419 {
1420 char buf[64], *ep = getenv(MAKE_LEVEL_ENV);
1421
1422 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0;
1423 if (makelevel < 0)
1424 makelevel = 0;
1425 snprintf(buf, sizeof buf, "%d", makelevel);
1426 Global_Set(".MAKE.LEVEL", buf);
1427 snprintf(buf, sizeof buf, "%u", myPid);
1428 Global_Set_ReadOnly(".MAKE.PID", buf);
1429 snprintf(buf, sizeof buf, "%u", getppid());
1430 Global_Set_ReadOnly(".MAKE.PPID", buf);
1431 snprintf(buf, sizeof buf, "%u", getuid());
1432 Global_Set_ReadOnly(".MAKE.UID", buf);
1433 snprintf(buf, sizeof buf, "%u", getgid());
1434 Global_Set_ReadOnly(".MAKE.GID", buf);
1435 }
1436 if (makelevel > 0) {
1437 char pn[1024];
1438 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel);
1439 progname = bmake_strdup(pn);
1440 }
1441
1442 #ifdef USE_META
1443 meta_init();
1444 #endif
1445 Dir_Init();
1446
1447 #ifdef POSIX
1448 {
1449 char *makeflags = explode(getenv("MAKEFLAGS"));
1450 Main_ParseArgLine(makeflags);
1451 free(makeflags);
1452 }
1453 #else
1454 /*
1455 * First snag any flags out of the MAKE environment variable.
1456 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
1457 * in a different format).
1458 */
1459 Main_ParseArgLine(getenv("MAKE"));
1460 #endif
1461
1462 if (getcwd(curdir, MAXPATHLEN) == NULL) {
1463 (void)fprintf(stderr, "%s: getcwd: %s.\n",
1464 progname, strerror(errno));
1465 exit(2);
1466 }
1467
1468 MainParseArgs(argc, argv);
1469
1470 if (opts.enterFlag)
1471 printf("%s: Entering directory `%s'\n", progname, curdir);
1472
1473 if (stat(curdir, &sa) == -1) {
1474 (void)fprintf(stderr, "%s: %s: %s.\n",
1475 progname, curdir, strerror(errno));
1476 exit(2);
1477 }
1478
1479 #ifndef NO_PWD_OVERRIDE
1480 HandlePWD(&sa);
1481 #endif
1482 Global_Set(".CURDIR", curdir);
1483
1484 InitObjdir(machine, machine_arch);
1485
1486 Arch_Init();
1487 Suff_Init();
1488 Trace_Init(tracefile);
1489
1490 defaultNode = NULL;
1491 (void)time(&now);
1492
1493 Trace_Log(MAKESTART, NULL);
1494
1495 InitVarTargets();
1496
1497 InitDefSysIncPath(syspath);
1498 }
1499
1500 /*
1501 * Read the system makefile followed by either makefile, Makefile or the
1502 * files given by the -f option. Exit on parse errors.
1503 */
1504 static void
main_ReadFiles(void)1505 main_ReadFiles(void)
1506 {
1507
1508 if (Lst_IsEmpty(&sysIncPath->dirs))
1509 SearchPath_AddAll(sysIncPath, defSysIncPath);
1510
1511 Dir_SetSYSPATH();
1512 if (!opts.noBuiltins)
1513 ReadBuiltinRules();
1514
1515 posix_state = PS_MAYBE_NEXT_LINE;
1516 if (!Lst_IsEmpty(&opts.makefiles))
1517 ReadAllMakefiles(&opts.makefiles);
1518 else
1519 ReadFirstDefaultMakefile();
1520 }
1521
1522 /* Compute the dependency graph. */
1523 static void
main_PrepareMaking(void)1524 main_PrepareMaking(void)
1525 {
1526 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1527 if (!opts.noBuiltins || opts.printVars == PVM_NONE) {
1528 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}",
1529 SCOPE_CMDLINE, VARE_WANTRES);
1530 if (makeDependfile[0] != '\0') {
1531 /* TODO: handle errors */
1532 doing_depend = true;
1533 (void)ReadMakefile(makeDependfile);
1534 doing_depend = false;
1535 }
1536 }
1537
1538 if (enterFlagObj)
1539 printf("%s: Entering directory `%s'\n", progname, objdir);
1540
1541 MakeMode();
1542
1543 {
1544 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS);
1545 Global_Append("MFLAGS", makeflags.str);
1546 FStr_Done(&makeflags);
1547 }
1548
1549 InitMaxJobs();
1550
1551 if (!opts.compatMake && !forceJobs)
1552 opts.compatMake = true;
1553
1554 if (!opts.compatMake)
1555 Job_ServerStart(maxJobTokens, jp_0, jp_1);
1556 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1557 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0);
1558
1559 if (opts.printVars == PVM_NONE)
1560 Main_ExportMAKEFLAGS(true); /* initial export */
1561
1562 InitVpath();
1563
1564 /*
1565 * Now that all search paths have been read for suffixes et al, it's
1566 * time to add the default search path to their lists...
1567 */
1568 Suff_ExtendPaths();
1569
1570 /*
1571 * Propagate attributes through :: dependency lists.
1572 */
1573 Targ_Propagate();
1574
1575 /* print the initial graph, if the user requested it */
1576 if (DEBUG(GRAPH1))
1577 Targ_PrintGraph(1);
1578 }
1579
1580 /*
1581 * Make the targets.
1582 * If the -v or -V options are given, print variables instead.
1583 * Return whether any of the targets is out-of-date.
1584 */
1585 static bool
main_Run(void)1586 main_Run(void)
1587 {
1588 if (opts.printVars != PVM_NONE) {
1589 /* print the values of any variables requested by the user */
1590 doPrintVars();
1591 return false;
1592 } else {
1593 return runTargets();
1594 }
1595 }
1596
1597 /* Clean up after making the targets. */
1598 static void
main_CleanUp(void)1599 main_CleanUp(void)
1600 {
1601 #ifdef CLEANUP
1602 Lst_DoneCall(&opts.variables, free);
1603 Lst_DoneCall(&opts.makefiles, free);
1604 Lst_DoneCall(&opts.create, free);
1605 #endif
1606
1607 if (DEBUG(GRAPH2))
1608 Targ_PrintGraph(2);
1609
1610 Trace_Log(MAKEEND, NULL);
1611
1612 if (enterFlagObj)
1613 printf("%s: Leaving directory `%s'\n", progname, objdir);
1614 if (opts.enterFlag)
1615 printf("%s: Leaving directory `%s'\n", progname, curdir);
1616
1617 #ifdef USE_META
1618 meta_finish();
1619 #endif
1620 Suff_End();
1621 Targ_End();
1622 Arch_End();
1623 Var_End();
1624 Parse_End();
1625 Dir_End();
1626 Job_End();
1627 Trace_End();
1628 Str_Intern_End();
1629 }
1630
1631 /* Determine the exit code. */
1632 static int
main_Exit(bool outOfDate)1633 main_Exit(bool outOfDate)
1634 {
1635 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0))
1636 return 2; /* Not 1 so -q can distinguish error */
1637 return outOfDate ? 1 : 0;
1638 }
1639
1640 int
main(int argc,char ** argv)1641 main(int argc, char **argv)
1642 {
1643 bool outOfDate;
1644
1645 main_Init(argc, argv);
1646 main_ReadFiles();
1647 main_PrepareMaking();
1648 outOfDate = main_Run();
1649 main_CleanUp();
1650 return main_Exit(outOfDate);
1651 }
1652
1653 /*
1654 * Open and parse the given makefile, with all its side effects.
1655 * Return false if the file could not be opened.
1656 */
1657 static bool
ReadMakefile(const char * fname)1658 ReadMakefile(const char *fname)
1659 {
1660 int fd;
1661 char *name, *path = NULL;
1662
1663 if (strcmp(fname, "-") == 0) {
1664 Parse_File("(stdin)", -1);
1665 Var_Set(SCOPE_INTERNAL, "MAKEFILE", "");
1666 } else {
1667 /* if we've chdir'd, rebuild the path name */
1668 if (strcmp(curdir, objdir) != 0 && *fname != '/') {
1669 path = str_concat3(curdir, "/", fname);
1670 fd = open(path, O_RDONLY);
1671 if (fd != -1) {
1672 fname = path;
1673 goto found;
1674 }
1675 free(path);
1676
1677 /* If curdir failed, try objdir (ala .depend) */
1678 path = str_concat3(objdir, "/", fname);
1679 fd = open(path, O_RDONLY);
1680 if (fd != -1) {
1681 fname = path;
1682 goto found;
1683 }
1684 } else {
1685 fd = open(fname, O_RDONLY);
1686 if (fd != -1)
1687 goto found;
1688 }
1689 /* look in -I and system include directories. */
1690 name = Dir_FindFile(fname, parseIncPath);
1691 if (name == NULL) {
1692 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs)
1693 ? defSysIncPath : sysIncPath;
1694 name = Dir_FindFile(fname, sysInc);
1695 }
1696 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) {
1697 free(name);
1698 free(path);
1699 return false;
1700 }
1701 fname = name;
1702 /*
1703 * set the MAKEFILE variable desired by System V fans -- the
1704 * placement of the setting here means it gets set to the last
1705 * makefile specified, as it is set by SysV make.
1706 */
1707 found:
1708 if (!doing_depend)
1709 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname);
1710 Parse_File(fname, fd);
1711 }
1712 free(path);
1713 return true;
1714 }
1715
1716 /*
1717 * Execute the command in cmd, and return its output (only stdout, not
1718 * stderr, possibly empty). In the output, replace newlines with spaces.
1719 */
1720 char *
Cmd_Exec(const char * cmd,char ** error)1721 Cmd_Exec(const char *cmd, char **error)
1722 {
1723 const char *args[4]; /* Arguments for invoking the shell */
1724 int pipefds[2];
1725 int cpid; /* Child PID */
1726 int pid; /* PID from wait() */
1727 int status; /* command exit status */
1728 Buffer buf; /* buffer to store the result */
1729 ssize_t bytes_read;
1730 char *output;
1731 char *cp;
1732 int saved_errno;
1733
1734 if (shellName == NULL)
1735 Shell_Init();
1736
1737 args[0] = shellName;
1738 args[1] = "-c";
1739 args[2] = cmd;
1740 args[3] = NULL;
1741 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd);
1742
1743 if (pipe(pipefds) == -1) {
1744 *error = str_concat3(
1745 "Couldn't create pipe for \"", cmd, "\"");
1746 return bmake_strdup("");
1747 }
1748
1749 Var_ReexportVars();
1750
1751 switch (cpid = vfork()) {
1752 case 0:
1753 (void)close(pipefds[0]);
1754 (void)dup2(pipefds[1], STDOUT_FILENO);
1755 (void)close(pipefds[1]);
1756
1757 (void)execv(shellPath, UNCONST(args));
1758 _exit(1);
1759 /* NOTREACHED */
1760
1761 case -1:
1762 *error = str_concat3("Couldn't exec \"", cmd, "\"");
1763 return bmake_strdup("");
1764 }
1765
1766 (void)close(pipefds[1]); /* No need for the writing half */
1767
1768 saved_errno = 0;
1769 Buf_Init(&buf);
1770
1771 do {
1772 char result[BUFSIZ];
1773 bytes_read = read(pipefds[0], result, sizeof result);
1774 if (bytes_read > 0)
1775 Buf_AddBytes(&buf, result, (size_t)bytes_read);
1776 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR));
1777 if (bytes_read == -1)
1778 saved_errno = errno;
1779
1780 (void)close(pipefds[0]); /* Close the input side of the pipe. */
1781
1782 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0)
1783 JobReapChild(pid, status, false);
1784
1785 if (Buf_EndsWith(&buf, '\n'))
1786 buf.data[buf.len - 1] = '\0';
1787
1788 output = Buf_DoneData(&buf);
1789 for (cp = output; *cp != '\0'; cp++)
1790 if (*cp == '\n')
1791 *cp = ' ';
1792
1793 if (WIFSIGNALED(status))
1794 *error = str_concat3("\"", cmd, "\" exited on a signal");
1795 else if (WEXITSTATUS(status) != 0)
1796 *error = str_concat3(
1797 "\"", cmd, "\" returned non-zero status");
1798 else if (saved_errno != 0)
1799 *error = str_concat3(
1800 "Couldn't read shell's output for \"", cmd, "\"");
1801 else
1802 *error = NULL;
1803 return output;
1804 }
1805
1806 /*
1807 * Print a printf-style error message.
1808 *
1809 * In default mode, this error message has no consequences, for compatibility
1810 * reasons, in particular it does not affect the exit status. Only in lint
1811 * mode (-dL) it does.
1812 */
1813 void
Error(const char * fmt,...)1814 Error(const char *fmt, ...)
1815 {
1816 va_list ap;
1817 FILE *f;
1818
1819 f = opts.debug_file;
1820 if (f == stdout)
1821 f = stderr;
1822 (void)fflush(stdout);
1823
1824 for (;;) {
1825 fprintf(f, "%s: ", progname);
1826 va_start(ap, fmt);
1827 (void)vfprintf(f, fmt, ap);
1828 va_end(ap);
1829 (void)fprintf(f, "\n");
1830 (void)fflush(f);
1831 if (f == stderr)
1832 break;
1833 f = stderr;
1834 }
1835 main_errors++;
1836 }
1837
1838 /*
1839 * Wait for any running jobs to finish, then produce an error message,
1840 * finally exit immediately.
1841 *
1842 * Exiting immediately differs from Parse_Error, which exits only after the
1843 * current top-level makefile has been parsed completely.
1844 */
1845 void
Fatal(const char * fmt,...)1846 Fatal(const char *fmt, ...)
1847 {
1848 va_list ap;
1849
1850 if (jobsRunning)
1851 Job_Wait();
1852
1853 (void)fflush(stdout);
1854 va_start(ap, fmt);
1855 (void)vfprintf(stderr, fmt, ap);
1856 va_end(ap);
1857 (void)fprintf(stderr, "\n");
1858 (void)fflush(stderr);
1859 PrintStackTrace(true);
1860
1861 PrintOnError(NULL, "\n");
1862
1863 if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1864 Targ_PrintGraph(2);
1865 Trace_Log(MAKEERROR, NULL);
1866 exit(2); /* Not 1 so -q can distinguish error */
1867 }
1868
1869 /*
1870 * Major exception once jobs are being created.
1871 * Kills all jobs, prints a message and exits.
1872 */
1873 void
Punt(const char * fmt,...)1874 Punt(const char *fmt, ...)
1875 {
1876 va_list ap;
1877
1878 (void)fflush(stdout);
1879 (void)fprintf(stderr, "%s: ", progname);
1880 va_start(ap, fmt);
1881 (void)vfprintf(stderr, fmt, ap);
1882 va_end(ap);
1883 (void)fprintf(stderr, "\n");
1884 (void)fflush(stderr);
1885
1886 PrintOnError(NULL, "\n");
1887
1888 DieHorribly();
1889 }
1890
1891 /* Exit without giving a message. */
1892 void
DieHorribly(void)1893 DieHorribly(void)
1894 {
1895 if (jobsRunning)
1896 Job_AbortAll();
1897 if (DEBUG(GRAPH2))
1898 Targ_PrintGraph(2);
1899 Trace_Log(MAKEERROR, NULL);
1900 exit(2); /* Not 1 so -q can distinguish error */
1901 }
1902
1903 /*
1904 * Called when aborting due to errors in child shell to signal abnormal exit.
1905 * The program exits.
1906 * Errors is the number of errors encountered in Make_Make.
1907 */
1908 void
Finish(int errs)1909 Finish(int errs)
1910 {
1911 if (shouldDieQuietly(NULL, -1))
1912 exit(2);
1913 Fatal("%d error%s", errs, errs == 1 ? "" : "s");
1914 }
1915
1916 int
unlink_file(const char * file)1917 unlink_file(const char *file)
1918 {
1919 struct stat st;
1920
1921 if (lstat(file, &st) == -1)
1922 return -1;
1923
1924 if (S_ISDIR(st.st_mode)) {
1925 /*
1926 * POSIX says for unlink: "The path argument shall not name
1927 * a directory unless [...]".
1928 */
1929 errno = EISDIR;
1930 return -1;
1931 }
1932 return unlink(file);
1933 }
1934
1935 static void
write_all(int fd,const void * data,size_t n)1936 write_all(int fd, const void *data, size_t n)
1937 {
1938 const char *mem = data;
1939
1940 while (n > 0) {
1941 ssize_t written = write(fd, mem, n);
1942 /* XXX: Should this EAGAIN be EINTR? */
1943 if (written == -1 && errno == EAGAIN)
1944 continue;
1945 if (written == -1)
1946 break;
1947 mem += written;
1948 n -= (size_t)written;
1949 }
1950 }
1951
1952 /* Print why exec failed, avoiding stdio. */
1953 void MAKE_ATTR_DEAD
execDie(const char * af,const char * av)1954 execDie(const char *af, const char *av)
1955 {
1956 Buffer buf;
1957
1958 Buf_Init(&buf);
1959 Buf_AddStr(&buf, progname);
1960 Buf_AddStr(&buf, ": ");
1961 Buf_AddStr(&buf, af);
1962 Buf_AddStr(&buf, "(");
1963 Buf_AddStr(&buf, av);
1964 Buf_AddStr(&buf, ") failed (");
1965 Buf_AddStr(&buf, strerror(errno));
1966 Buf_AddStr(&buf, ")\n");
1967
1968 write_all(STDERR_FILENO, buf.data, buf.len);
1969
1970 Buf_Done(&buf);
1971 _exit(1);
1972 }
1973
1974 static void
purge_relative_cached_realpaths(void)1975 purge_relative_cached_realpaths(void)
1976 {
1977 HashEntry *he, *nhe;
1978 HashIter hi;
1979
1980 HashIter_Init(&hi, &cached_realpaths);
1981 he = HashIter_Next(&hi);
1982 while (he != NULL) {
1983 nhe = HashIter_Next(&hi);
1984 if (he->key[0] != '/') {
1985 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key);
1986 HashTable_DeleteEntry(&cached_realpaths, he);
1987 /*
1988 * XXX: What about the allocated he->value? Either
1989 * free them or document why they cannot be freed.
1990 */
1991 }
1992 he = nhe;
1993 }
1994 }
1995
1996 const char *
cached_realpath(const char * pathname,char * resolved)1997 cached_realpath(const char *pathname, char *resolved)
1998 {
1999 const char *rp;
2000
2001 if (pathname == NULL || pathname[0] == '\0')
2002 return NULL;
2003
2004 rp = HashTable_FindValue(&cached_realpaths, pathname);
2005 if (rp != NULL) {
2006 /* a hit */
2007 strncpy(resolved, rp, MAXPATHLEN);
2008 resolved[MAXPATHLEN - 1] = '\0';
2009 return resolved;
2010 }
2011
2012 rp = realpath(pathname, resolved);
2013 if (rp != NULL) {
2014 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp));
2015 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp);
2016 return resolved;
2017 }
2018
2019 /* should we negative-cache? */
2020 return NULL;
2021 }
2022
2023 /*
2024 * Return true if we should die without noise.
2025 * For example our failing child was a sub-make or failure happened elsewhere.
2026 */
2027 bool
shouldDieQuietly(GNode * gn,int bf)2028 shouldDieQuietly(GNode *gn, int bf)
2029 {
2030 static int quietly = -1;
2031
2032 if (quietly < 0) {
2033 if (DEBUG(JOB) ||
2034 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true))
2035 quietly = 0;
2036 else if (bf >= 0)
2037 quietly = bf;
2038 else
2039 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0;
2040 }
2041 return quietly != 0;
2042 }
2043
2044 static void
SetErrorVars(GNode * gn)2045 SetErrorVars(GNode *gn)
2046 {
2047 StringListNode *ln;
2048
2049 /*
2050 * We can print this even if there is no .ERROR target.
2051 */
2052 Global_Set(".ERROR_TARGET", gn->name);
2053 Global_Delete(".ERROR_CMD");
2054
2055 for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
2056 const char *cmd = ln->datum;
2057
2058 if (cmd == NULL)
2059 break;
2060 Global_Append(".ERROR_CMD", cmd);
2061 }
2062 }
2063
2064 /*
2065 * Print some helpful information in case of an error.
2066 * The caller should exit soon after calling this function.
2067 */
2068 void
PrintOnError(GNode * gn,const char * msg)2069 PrintOnError(GNode *gn, const char *msg)
2070 {
2071 static GNode *errorNode = NULL;
2072
2073 if (DEBUG(HASH)) {
2074 Targ_Stats();
2075 Var_Stats();
2076 }
2077
2078 if (errorNode != NULL)
2079 return; /* we've been here! */
2080
2081 printf("%s%s: stopped in %s\n", msg, progname, curdir);
2082
2083 /* we generally want to keep quiet if a sub-make died */
2084 if (shouldDieQuietly(gn, -1))
2085 return;
2086
2087 if (gn != NULL)
2088 SetErrorVars(gn);
2089
2090 {
2091 char *errorVarsValues = Var_Subst(
2092 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
2093 SCOPE_GLOBAL, VARE_WANTRES);
2094 /* TODO: handle errors */
2095 printf("%s", errorVarsValues);
2096 free(errorVarsValues);
2097 }
2098
2099 fflush(stdout);
2100
2101 /*
2102 * Finally, see if there is a .ERROR target, and run it if so.
2103 */
2104 errorNode = Targ_FindNode(".ERROR");
2105 if (errorNode != NULL) {
2106 errorNode->type |= OP_SPECIAL;
2107 Compat_Make(errorNode, errorNode);
2108 }
2109 }
2110
2111 void
Main_ExportMAKEFLAGS(bool first)2112 Main_ExportMAKEFLAGS(bool first)
2113 {
2114 static bool once = true;
2115 char *flags;
2116
2117 if (once != first)
2118 return;
2119 once = false;
2120
2121 flags = Var_Subst(
2122 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
2123 SCOPE_CMDLINE, VARE_WANTRES);
2124 /* TODO: handle errors */
2125 if (flags[0] != '\0') {
2126 #ifdef POSIX
2127 setenv("MAKEFLAGS", flags, 1);
2128 #else
2129 setenv("MAKE", flags, 1);
2130 #endif
2131 }
2132 }
2133
2134 char *
getTmpdir(void)2135 getTmpdir(void)
2136 {
2137 static char *tmpdir = NULL;
2138 struct stat st;
2139
2140 if (tmpdir != NULL)
2141 return tmpdir;
2142
2143 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */
2144 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/",
2145 SCOPE_GLOBAL, VARE_WANTRES);
2146 /* TODO: handle errors */
2147
2148 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2149 free(tmpdir);
2150 tmpdir = bmake_strdup(_PATH_TMP);
2151 }
2152 return tmpdir;
2153 }
2154
2155 /*
2156 * Create and open a temp file using "pattern".
2157 * If out_fname is provided, set it to a copy of the filename created.
2158 * Otherwise unlink the file once open.
2159 */
2160 int
mkTempFile(const char * pattern,char * tfile,size_t tfile_sz)2161 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz)
2162 {
2163 static char *tmpdir = NULL;
2164 char tbuf[MAXPATHLEN];
2165 int fd;
2166
2167 if (pattern == NULL)
2168 pattern = TMPPAT;
2169 if (tmpdir == NULL)
2170 tmpdir = getTmpdir();
2171 if (tfile == NULL) {
2172 tfile = tbuf;
2173 tfile_sz = sizeof tbuf;
2174 }
2175
2176 if (pattern[0] == '/')
2177 snprintf(tfile, tfile_sz, "%s", pattern);
2178 else
2179 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern);
2180
2181 if ((fd = mkstemp(tfile)) < 0)
2182 Punt("Could not create temporary file %s: %s", tfile,
2183 strerror(errno));
2184 if (tfile == tbuf)
2185 unlink(tfile); /* we just want the descriptor */
2186
2187 return fd;
2188 }
2189
2190 /*
2191 * Convert a string representation of a boolean into a boolean value.
2192 * Anything that looks like "No", "False", "Off", "0" etc. is false,
2193 * the empty string is the fallback, everything else is true.
2194 */
2195 bool
ParseBoolean(const char * s,bool fallback)2196 ParseBoolean(const char *s, bool fallback)
2197 {
2198 char ch = ch_tolower(s[0]);
2199 if (ch == '\0')
2200 return fallback;
2201 if (ch == '0' || ch == 'f' || ch == 'n')
2202 return false;
2203 if (ch == 'o')
2204 return ch_tolower(s[1]) != 'f';
2205 return true;
2206 }
2207