1 /* $NetBSD: main.c,v 1.577 2022/01/29 09:38:26 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 1.577 2022/01/29 09:38:26 rillig Exp $");
115 #if defined(MAKE_NATIVE) && !defined(lint)
116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 "
117 "The Regents of the University of California. "
118 "All rights reserved.");
119 #endif
120
121 #ifndef __arraycount
122 # define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
123 #endif
124
125 CmdOpts opts;
126 time_t now; /* Time at start of make */
127 GNode *defaultNode; /* .DEFAULT node */
128 bool allPrecious; /* .PRECIOUS given on line by itself */
129 bool deleteOnError; /* .DELETE_ON_ERROR: set */
130
131 static int maxJobTokens; /* -j argument */
132 bool enterFlagObj; /* -w and objdir != srcdir */
133
134 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */
135 bool doing_depend; /* Set while reading .depend */
136 static bool jobsRunning; /* true if the jobs might be running */
137 static const char *tracefile;
138 static 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 debug_setbuf;
322 default:
323 (void)fprintf(stderr,
324 "%s: illegal argument to d option -- %c\n",
325 progname, *modules);
326 usage();
327 }
328 }
329
330 debug_setbuf:
331 opts.debug = debug;
332
333 /*
334 * Make the debug_file unbuffered, and make
335 * stdout line buffered (unless debugfile == stdout).
336 */
337 setvbuf(opts.debug_file, NULL, _IONBF, 0);
338 if (opts.debug_file != stdout) {
339 setvbuf(stdout, NULL, _IOLBF, 0);
340 }
341 }
342
343 /* Is path relative, or does it contain any relative component "." or ".."? */
344 static bool
IsRelativePath(const char * path)345 IsRelativePath(const char *path)
346 {
347 const char *p;
348
349 if (path[0] != '/')
350 return true;
351 p = path;
352 while ((p = strstr(p, "/.")) != NULL) {
353 p += 2;
354 if (*p == '.')
355 p++;
356 if (*p == '/' || *p == '\0')
357 return true;
358 }
359 return false;
360 }
361
362 static void
MainParseArgChdir(const char * argvalue)363 MainParseArgChdir(const char *argvalue)
364 {
365 struct stat sa, sb;
366
367 if (chdir(argvalue) == -1) {
368 (void)fprintf(stderr, "%s: chdir %s: %s\n",
369 progname, argvalue, strerror(errno));
370 exit(2); /* Not 1 so -q can distinguish error */
371 }
372 if (getcwd(curdir, MAXPATHLEN) == NULL) {
373 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
374 exit(2);
375 }
376 if (!IsRelativePath(argvalue) &&
377 stat(argvalue, &sa) != -1 &&
378 stat(curdir, &sb) != -1 &&
379 sa.st_ino == sb.st_ino &&
380 sa.st_dev == sb.st_dev)
381 strncpy(curdir, argvalue, MAXPATHLEN);
382 ignorePWD = true;
383 }
384
385 static void
MainParseArgJobsInternal(const char * argvalue)386 MainParseArgJobsInternal(const char *argvalue)
387 {
388 char end;
389 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) {
390 (void)fprintf(stderr,
391 "%s: internal error -- J option malformed (%s)\n",
392 progname, argvalue);
393 usage();
394 }
395 if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
396 (fcntl(jp_1, F_GETFD, 0) < 0)) {
397 jp_0 = -1;
398 jp_1 = -1;
399 opts.compatMake = true;
400 } else {
401 Global_Append(MAKEFLAGS, "-J");
402 Global_Append(MAKEFLAGS, argvalue);
403 }
404 }
405
406 static void
MainParseArgJobs(const char * argvalue)407 MainParseArgJobs(const char *argvalue)
408 {
409 char *p;
410
411 forceJobs = true;
412 opts.maxJobs = (int)strtol(argvalue, &p, 0);
413 if (*p != '\0' || opts.maxJobs < 1) {
414 (void)fprintf(stderr,
415 "%s: illegal argument to -j -- must be positive integer!\n",
416 progname);
417 exit(2); /* Not 1 so -q can distinguish error */
418 }
419 Global_Append(MAKEFLAGS, "-j");
420 Global_Append(MAKEFLAGS, argvalue);
421 Global_Set(".MAKE.JOBS", argvalue);
422 maxJobTokens = opts.maxJobs;
423 }
424
425 static void
MainParseArgSysInc(const char * argvalue)426 MainParseArgSysInc(const char *argvalue)
427 {
428 /* look for magic parent directory search string */
429 if (strncmp(".../", argvalue, 4) == 0) {
430 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4);
431 if (found_path == NULL)
432 return;
433 (void)SearchPath_Add(sysIncPath, found_path);
434 free(found_path);
435 } else {
436 (void)SearchPath_Add(sysIncPath, argvalue);
437 }
438 Global_Append(MAKEFLAGS, "-m");
439 Global_Append(MAKEFLAGS, argvalue);
440 }
441
442 static bool
MainParseArg(char c,const char * argvalue)443 MainParseArg(char c, const char *argvalue)
444 {
445 switch (c) {
446 case '\0':
447 break;
448 case 'B':
449 opts.compatMake = true;
450 Global_Append(MAKEFLAGS, "-B");
451 Global_Set(MAKE_MODE, "compat");
452 break;
453 case 'C':
454 MainParseArgChdir(argvalue);
455 break;
456 case 'D':
457 if (argvalue[0] == '\0')
458 return false;
459 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1");
460 Global_Append(MAKEFLAGS, "-D");
461 Global_Append(MAKEFLAGS, argvalue);
462 break;
463 case 'I':
464 Parse_AddIncludeDir(argvalue);
465 Global_Append(MAKEFLAGS, "-I");
466 Global_Append(MAKEFLAGS, argvalue);
467 break;
468 case 'J':
469 MainParseArgJobsInternal(argvalue);
470 break;
471 case 'N':
472 opts.noExecute = true;
473 opts.noRecursiveExecute = true;
474 Global_Append(MAKEFLAGS, "-N");
475 break;
476 case 'S':
477 opts.keepgoing = false;
478 Global_Append(MAKEFLAGS, "-S");
479 break;
480 case 'T':
481 tracefile = bmake_strdup(argvalue);
482 Global_Append(MAKEFLAGS, "-T");
483 Global_Append(MAKEFLAGS, argvalue);
484 break;
485 case 'V':
486 case 'v':
487 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED;
488 Lst_Append(&opts.variables, bmake_strdup(argvalue));
489 /* XXX: Why always -V? */
490 Global_Append(MAKEFLAGS, "-V");
491 Global_Append(MAKEFLAGS, argvalue);
492 break;
493 case 'W':
494 opts.parseWarnFatal = true;
495 /* XXX: why no Global_Append? */
496 break;
497 case 'X':
498 opts.varNoExportEnv = true;
499 Global_Append(MAKEFLAGS, "-X");
500 break;
501 case 'd':
502 /* If '-d-opts' don't pass to children */
503 if (argvalue[0] == '-')
504 argvalue++;
505 else {
506 Global_Append(MAKEFLAGS, "-d");
507 Global_Append(MAKEFLAGS, argvalue);
508 }
509 MainParseArgDebug(argvalue);
510 break;
511 case 'e':
512 opts.checkEnvFirst = true;
513 Global_Append(MAKEFLAGS, "-e");
514 break;
515 case 'f':
516 Lst_Append(&opts.makefiles, bmake_strdup(argvalue));
517 break;
518 case 'i':
519 opts.ignoreErrors = true;
520 Global_Append(MAKEFLAGS, "-i");
521 break;
522 case 'j':
523 MainParseArgJobs(argvalue);
524 break;
525 case 'k':
526 opts.keepgoing = true;
527 Global_Append(MAKEFLAGS, "-k");
528 break;
529 case 'm':
530 MainParseArgSysInc(argvalue);
531 /* XXX: why no Var_Append? */
532 break;
533 case 'n':
534 opts.noExecute = true;
535 Global_Append(MAKEFLAGS, "-n");
536 break;
537 case 'q':
538 opts.query = true;
539 /* Kind of nonsensical, wot? */
540 Global_Append(MAKEFLAGS, "-q");
541 break;
542 case 'r':
543 opts.noBuiltins = true;
544 Global_Append(MAKEFLAGS, "-r");
545 break;
546 case 's':
547 opts.silent = true;
548 Global_Append(MAKEFLAGS, "-s");
549 break;
550 case 't':
551 opts.touch = true;
552 Global_Append(MAKEFLAGS, "-t");
553 break;
554 case 'w':
555 opts.enterFlag = true;
556 Global_Append(MAKEFLAGS, "-w");
557 break;
558 default:
559 usage();
560 }
561 return true;
562 }
563
564 /*
565 * Parse the given arguments. Called from main() and from
566 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
567 *
568 * The arguments must be treated as read-only and will be freed after the
569 * call.
570 *
571 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
572 */
573 static void
MainParseArgs(int argc,char ** argv)574 MainParseArgs(int argc, char **argv)
575 {
576 char c;
577 int arginc;
578 char *argvalue;
579 char *optscan;
580 bool inOption, dashDash = false;
581
582 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w";
583 /* Can't actually use getopt(3) because rescanning is not portable */
584
585 rearg:
586 inOption = false;
587 optscan = NULL;
588 while (argc > 1) {
589 const char *optspec;
590 if (!inOption)
591 optscan = argv[1];
592 c = *optscan++;
593 arginc = 0;
594 if (inOption) {
595 if (c == '\0') {
596 argv++;
597 argc--;
598 inOption = false;
599 continue;
600 }
601 } else {
602 if (c != '-' || dashDash)
603 break;
604 inOption = true;
605 c = *optscan++;
606 }
607 /* '-' found at some earlier point */
608 optspec = strchr(optspecs, c);
609 if (c != '\0' && optspec != NULL && optspec[1] == ':') {
610 /*
611 * -<something> found, and <something> should have an
612 * argument
613 */
614 inOption = false;
615 arginc = 1;
616 argvalue = optscan;
617 if (*argvalue == '\0') {
618 if (argc < 3)
619 goto noarg;
620 argvalue = argv[2];
621 arginc = 2;
622 }
623 } else {
624 argvalue = NULL;
625 }
626 switch (c) {
627 case '\0':
628 arginc = 1;
629 inOption = false;
630 break;
631 case '-':
632 dashDash = true;
633 break;
634 default:
635 if (!MainParseArg(c, argvalue))
636 goto noarg;
637 }
638 argv += arginc;
639 argc -= arginc;
640 }
641
642 /*
643 * See if the rest of the arguments are variable assignments and
644 * perform them if so. Else take them to be targets and stuff them
645 * on the end of the "create" list.
646 */
647 for (; argc > 1; argv++, argc--) {
648 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) {
649 if (argv[1][0] == '\0')
650 Punt("illegal (null) argument.");
651 if (argv[1][0] == '-' && !dashDash)
652 goto rearg;
653 Lst_Append(&opts.create, bmake_strdup(argv[1]));
654 }
655 }
656
657 return;
658 noarg:
659 (void)fprintf(stderr, "%s: option requires an argument -- %c\n",
660 progname, c);
661 usage();
662 }
663
664 /*
665 * Break a line of arguments into words and parse them.
666 *
667 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and
668 * by main() when reading the MAKEFLAGS environment variable.
669 */
670 void
Main_ParseArgLine(const char * line)671 Main_ParseArgLine(const char *line)
672 {
673 Words words;
674 char *buf;
675
676 if (line == NULL)
677 return;
678 /* XXX: don't use line as an iterator variable */
679 for (; *line == ' '; line++)
680 continue;
681 if (line[0] == '\0')
682 return;
683
684 #ifndef POSIX
685 {
686 /*
687 * $MAKE may simply be naming the make(1) binary
688 */
689 char *cp;
690
691 if (!(cp = strrchr(line, '/')))
692 cp = line;
693 if ((cp = strstr(cp, "make")) &&
694 strcmp(cp, "make") == 0)
695 return;
696 }
697 #endif
698 {
699 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE");
700 buf = str_concat3(argv0.str, " ", line);
701 FStr_Done(&argv0);
702 }
703
704 words = Str_Words(buf, true);
705 if (words.words == NULL) {
706 Error("Unterminated quoted string [%s]", buf);
707 free(buf);
708 return;
709 }
710 free(buf);
711 MainParseArgs((int)words.len, words.words);
712
713 Words_Free(words);
714 }
715
716 bool
Main_SetObjdir(bool writable,const char * fmt,...)717 Main_SetObjdir(bool writable, const char *fmt, ...)
718 {
719 struct stat sb;
720 char *path;
721 char buf[MAXPATHLEN + 1];
722 char buf2[MAXPATHLEN + 1];
723 va_list ap;
724
725 va_start(ap, fmt);
726 vsnprintf(path = buf, MAXPATHLEN, fmt, ap);
727 va_end(ap);
728
729 if (path[0] != '/') {
730 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path);
731 path = buf2;
732 }
733
734 /* look for the directory and try to chdir there */
735 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode))
736 return false;
737
738 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) {
739 (void)fprintf(stderr, "%s warning: %s: %s.\n",
740 progname, path, strerror(errno));
741 return false;
742 }
743
744 snprintf(objdir, sizeof objdir, "%s", path);
745 Global_Set(".OBJDIR", objdir);
746 setenv("PWD", objdir, 1);
747 Dir_InitDot();
748 purge_relative_cached_realpaths();
749 if (opts.enterFlag && strcmp(objdir, curdir) != 0)
750 enterFlagObj = true;
751 return true;
752 }
753
754 static bool
SetVarObjdir(bool writable,const char * var,const char * suffix)755 SetVarObjdir(bool writable, const char *var, const char *suffix)
756 {
757 FStr path = Var_Value(SCOPE_CMDLINE, var);
758
759 if (path.str == NULL || path.str[0] == '\0') {
760 FStr_Done(&path);
761 return false;
762 }
763
764 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES);
765
766 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix);
767
768 FStr_Done(&path);
769 return true;
770 }
771
772 /*
773 * Splits str into words, adding them to the list.
774 * The string must be kept alive as long as the list.
775 */
776 int
str2Lst_Append(StringList * lp,char * str)777 str2Lst_Append(StringList *lp, char *str)
778 {
779 char *cp;
780 int n;
781
782 const char *sep = " \t";
783
784 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) {
785 Lst_Append(lp, cp);
786 n++;
787 }
788 return n;
789 }
790
791 #ifdef SIGINFO
792 /*ARGSUSED*/
793 static void
siginfo(int signo MAKE_ATTR_UNUSED)794 siginfo(int signo MAKE_ATTR_UNUSED)
795 {
796 char dir[MAXPATHLEN];
797 char str[2 * MAXPATHLEN];
798 int len;
799 if (getcwd(dir, sizeof dir) == NULL)
800 return;
801 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir);
802 if (len > 0)
803 (void)write(STDERR_FILENO, str, (size_t)len);
804 }
805 #endif
806
807 /* Allow makefiles some control over the mode we run in. */
808 static void
MakeMode(void)809 MakeMode(void)
810 {
811 char *mode;
812
813 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode);
814 /* TODO: handle errors */
815
816 if (mode[0] != '\0') {
817 if (strstr(mode, "compat") != NULL) {
818 opts.compatMake = true;
819 forceJobs = false;
820 }
821 #if USE_META
822 if (strstr(mode, "meta") != NULL)
823 meta_mode_init(mode);
824 #endif
825 }
826
827 free(mode);
828 }
829
830 static void
PrintVar(const char * varname,bool expandVars)831 PrintVar(const char *varname, bool expandVars)
832 {
833 if (strchr(varname, '$') != NULL) {
834 char *evalue;
835 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue);
836 /* TODO: handle errors */
837 printf("%s\n", evalue);
838 free(evalue);
839
840 } else if (expandVars) {
841 char *expr = str_concat3("${", varname, "}");
842 char *evalue;
843 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue);
844 /* TODO: handle errors */
845 free(expr);
846 printf("%s\n", evalue);
847 free(evalue);
848
849 } else {
850 FStr value = Var_Value(SCOPE_GLOBAL, varname);
851 printf("%s\n", value.str != NULL ? value.str : "");
852 FStr_Done(&value);
853 }
854 }
855
856 /*
857 * Return a bool based on a variable.
858 *
859 * If the knob is not set, return the fallback.
860 * If set, anything that looks or smells like "No", "False", "Off", "0", etc.
861 * is false, otherwise true.
862 */
863 bool
GetBooleanExpr(const char * expr,bool fallback)864 GetBooleanExpr(const char *expr, bool fallback)
865 {
866 char *value;
867 bool res;
868
869 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value);
870 /* TODO: handle errors */
871 res = ParseBoolean(value, fallback);
872 free(value);
873 return res;
874 }
875
876 static void
doPrintVars(void)877 doPrintVars(void)
878 {
879 StringListNode *ln;
880 bool expandVars;
881
882 if (opts.printVars == PVM_EXPANDED)
883 expandVars = true;
884 else if (opts.debugVflag)
885 expandVars = false;
886 else
887 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}",
888 false);
889
890 for (ln = opts.variables.first; ln != NULL; ln = ln->next) {
891 const char *varname = ln->datum;
892 PrintVar(varname, expandVars);
893 }
894 }
895
896 static bool
runTargets(void)897 runTargets(void)
898 {
899 GNodeList targs = LST_INIT; /* target nodes to create */
900 bool outOfDate; /* false if all targets up to date */
901
902 /*
903 * Have now read the entire graph and need to make a list of
904 * targets to create. If none was given on the command line,
905 * we consult the parsing module to find the main target(s)
906 * to create.
907 */
908 if (Lst_IsEmpty(&opts.create))
909 Parse_MainName(&targs);
910 else
911 Targ_FindList(&targs, &opts.create);
912
913 if (!opts.compatMake) {
914 /*
915 * Initialize job module before traversing the graph
916 * now that any .BEGIN and .END targets have been read.
917 * This is done only if the -q flag wasn't given
918 * (to prevent the .BEGIN from being executed should
919 * it exist).
920 */
921 if (!opts.query) {
922 Job_Init();
923 jobsRunning = true;
924 }
925
926 /* Traverse the graph, checking on all the targets */
927 outOfDate = Make_Run(&targs);
928 } else {
929 /*
930 * Compat_Init will take care of creating all the
931 * targets as well as initializing the module.
932 */
933 Compat_Run(&targs);
934 outOfDate = false;
935 }
936 Lst_Done(&targs); /* Don't free the targets themselves. */
937 return outOfDate;
938 }
939
940 /*
941 * Set up the .TARGETS variable to contain the list of targets to be created.
942 * If none specified, make the variable empty for now, the parser will fill
943 * in the default or .MAIN target later.
944 */
945 static void
InitVarTargets(void)946 InitVarTargets(void)
947 {
948 StringListNode *ln;
949
950 if (Lst_IsEmpty(&opts.create)) {
951 Global_Set(".TARGETS", "");
952 return;
953 }
954
955 for (ln = opts.create.first; ln != NULL; ln = ln->next) {
956 const char *name = ln->datum;
957 Global_Append(".TARGETS", name);
958 }
959 }
960
961 static void
InitRandom(void)962 InitRandom(void)
963 {
964 struct timeval tv;
965
966 gettimeofday(&tv, NULL);
967 srandom((unsigned int)(tv.tv_sec + tv.tv_usec));
968 }
969
970 static const char *
InitVarMachine(const struct utsname * utsname MAKE_ATTR_UNUSED)971 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED)
972 {
973 #ifdef FORCE_MACHINE
974 return FORCE_MACHINE;
975 #else
976 const char *machine = getenv("MACHINE");
977
978 if (machine != NULL)
979 return machine;
980
981 #if defined(MAKE_NATIVE)
982 return utsname->machine;
983 #elif defined(MAKE_MACHINE)
984 return MAKE_MACHINE;
985 #else
986 return "unknown";
987 #endif
988 #endif
989 }
990
991 static const char *
InitVarMachineArch(void)992 InitVarMachineArch(void)
993 {
994 #ifdef FORCE_MACHINE_ARCH
995 return FORCE_MACHINE_ARCH;
996 #else
997 const char *env = getenv("MACHINE_ARCH");
998 if (env != NULL)
999 return env;
1000
1001 #if defined(MAKE_NATIVE) && defined(CTL_HW)
1002 {
1003 struct utsname utsname;
1004 static char machine_arch_buf[sizeof utsname.machine];
1005 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
1006 size_t len = sizeof machine_arch_buf;
1007
1008 if (sysctl(mib, (unsigned int)__arraycount(mib),
1009 machine_arch_buf, &len, NULL, 0) < 0) {
1010 (void)fprintf(stderr, "%s: sysctl failed (%s).\n",
1011 progname, strerror(errno));
1012 exit(2);
1013 }
1014
1015 return machine_arch_buf;
1016 }
1017 #elif defined(MACHINE_ARCH)
1018 return MACHINE_ARCH;
1019 #elif defined(MAKE_MACHINE_ARCH)
1020 return MAKE_MACHINE_ARCH;
1021 #else
1022 return "unknown";
1023 #endif
1024 #endif
1025 }
1026
1027 #ifndef NO_PWD_OVERRIDE
1028 /*
1029 * All this code is so that we know where we are when we start up
1030 * on a different machine with pmake.
1031 *
1032 * XXX: Make no longer has "local" and "remote" mode. Is this code still
1033 * necessary?
1034 *
1035 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
1036 * since the value of curdir can vary depending on how we got
1037 * here. Ie sitting at a shell prompt (shell that provides $PWD)
1038 * or via subdir.mk in which case its likely a shell which does
1039 * not provide it.
1040 *
1041 * So, to stop it breaking this case only, we ignore PWD if
1042 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression.
1043 */
1044 static void
HandlePWD(const struct stat * curdir_st)1045 HandlePWD(const struct stat *curdir_st)
1046 {
1047 char *pwd;
1048 FStr makeobjdir;
1049 struct stat pwd_st;
1050
1051 if (ignorePWD || (pwd = getenv("PWD")) == NULL)
1052 return;
1053
1054 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"))
1055 return;
1056
1057 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR");
1058 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL)
1059 goto ignore_pwd;
1060
1061 if (stat(pwd, &pwd_st) == 0 &&
1062 curdir_st->st_ino == pwd_st.st_ino &&
1063 curdir_st->st_dev == pwd_st.st_dev)
1064 (void)strncpy(curdir, pwd, MAXPATHLEN);
1065
1066 ignore_pwd:
1067 FStr_Done(&makeobjdir);
1068 }
1069 #endif
1070
1071 /*
1072 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set
1073 * in the environment, try only that value and fall back to .CURDIR if it
1074 * does not exist.
1075 *
1076 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
1077 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these
1078 * paths exist, just use .CURDIR.
1079 */
1080 static void
InitObjdir(const char * machine,const char * machine_arch)1081 InitObjdir(const char *machine, const char *machine_arch)
1082 {
1083 bool writable;
1084
1085 Dir_InitCur(curdir);
1086 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true);
1087 (void)Main_SetObjdir(false, "%s", curdir);
1088
1089 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) &&
1090 !SetVarObjdir(writable, "MAKEOBJDIR", "") &&
1091 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
1092 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) &&
1093 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR))
1094 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir);
1095 }
1096
1097 /* get rid of resource limit on file descriptors */
1098 static void
UnlimitFiles(void)1099 UnlimitFiles(void)
1100 {
1101 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
1102 struct rlimit rl;
1103 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
1104 rl.rlim_cur != rl.rlim_max) {
1105 rl.rlim_cur = rl.rlim_max;
1106 (void)setrlimit(RLIMIT_NOFILE, &rl);
1107 }
1108 #endif
1109 }
1110
1111 static void
CmdOpts_Init(void)1112 CmdOpts_Init(void)
1113 {
1114 opts.compatMake = false;
1115 memset(&opts.debug, 0, sizeof(opts.debug));
1116 /* opts.debug_file has already been initialized earlier */
1117 opts.strict = false;
1118 opts.debugVflag = false;
1119 opts.checkEnvFirst = false;
1120 Lst_Init(&opts.makefiles);
1121 opts.ignoreErrors = false; /* Pay attention to non-zero returns */
1122 opts.maxJobs = 1;
1123 opts.keepgoing = false; /* Stop on error */
1124 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */
1125 opts.noExecute = false; /* Execute all commands */
1126 opts.query = false;
1127 opts.noBuiltins = false; /* Read the built-in rules */
1128 opts.silent = false; /* Print commands as executed */
1129 opts.touch = false;
1130 opts.printVars = PVM_NONE;
1131 Lst_Init(&opts.variables);
1132 opts.parseWarnFatal = false;
1133 opts.enterFlag = false;
1134 opts.varNoExportEnv = false;
1135 Lst_Init(&opts.create);
1136 }
1137
1138 /*
1139 * Initialize MAKE and .MAKE to the path of the executable, so that it can be
1140 * found by execvp(3) and the shells, even after a chdir.
1141 *
1142 * If it's a relative path and contains a '/', resolve it to an absolute path.
1143 * Otherwise keep it as is, assuming it will be found in the PATH.
1144 */
1145 static void
InitVarMake(const char * argv0)1146 InitVarMake(const char *argv0)
1147 {
1148 const char *make = argv0;
1149
1150 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) {
1151 char pathbuf[MAXPATHLEN];
1152 const char *abspath = cached_realpath(argv0, pathbuf);
1153 struct stat st;
1154 if (abspath != NULL && abspath[0] == '/' &&
1155 stat(make, &st) == 0)
1156 make = abspath;
1157 }
1158
1159 Global_Set("MAKE", make);
1160 Global_Set(".MAKE", make);
1161 }
1162
1163 /*
1164 * Add the directories from the colon-separated syspath to defSysIncPath.
1165 * After returning, the contents of syspath is unspecified.
1166 */
1167 static void
InitDefSysIncPath(char * syspath)1168 InitDefSysIncPath(char *syspath)
1169 {
1170 static char defsyspath[] = _PATH_DEFSYSPATH;
1171 char *start, *cp;
1172
1173 /*
1174 * If no user-supplied system path was given (through the -m option)
1175 * add the directories from the DEFSYSPATH (more than one may be given
1176 * as dir1:...:dirn) to the system include path.
1177 */
1178 if (syspath == NULL || syspath[0] == '\0')
1179 syspath = defsyspath;
1180 else
1181 syspath = bmake_strdup(syspath);
1182
1183 for (start = syspath; *start != '\0'; start = cp) {
1184 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
1185 continue;
1186 if (*cp == ':')
1187 *cp++ = '\0';
1188
1189 /* look for magic parent directory search string */
1190 if (strncmp(start, ".../", 4) == 0) {
1191 char *dir = Dir_FindHereOrAbove(curdir, start + 4);
1192 if (dir != NULL) {
1193 (void)SearchPath_Add(defSysIncPath, dir);
1194 free(dir);
1195 }
1196 } else {
1197 (void)SearchPath_Add(defSysIncPath, start);
1198 }
1199 }
1200
1201 if (syspath != defsyspath)
1202 free(syspath);
1203 }
1204
1205 static void
ReadBuiltinRules(void)1206 ReadBuiltinRules(void)
1207 {
1208 StringListNode *ln;
1209 StringList sysMkFiles = LST_INIT;
1210
1211 SearchPath_Expand(
1212 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath,
1213 _PATH_DEFSYSMK,
1214 &sysMkFiles);
1215 if (Lst_IsEmpty(&sysMkFiles))
1216 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK);
1217
1218 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next)
1219 if (ReadMakefile(ln->datum))
1220 break;
1221
1222 if (ln == NULL)
1223 Fatal("%s: cannot open %s.",
1224 progname, (const char *)sysMkFiles.first->datum);
1225
1226 Lst_DoneCall(&sysMkFiles, free);
1227 }
1228
1229 static void
InitMaxJobs(void)1230 InitMaxJobs(void)
1231 {
1232 char *value;
1233 int n;
1234
1235 if (forceJobs || opts.compatMake ||
1236 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS"))
1237 return;
1238
1239 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value);
1240 /* TODO: handle errors */
1241 n = (int)strtol(value, NULL, 0);
1242 if (n < 1) {
1243 (void)fprintf(stderr,
1244 "%s: illegal value for .MAKE.JOBS "
1245 "-- must be positive integer!\n",
1246 progname);
1247 exit(2); /* Not 1 so -q can distinguish error */
1248 }
1249
1250 if (n != opts.maxJobs) {
1251 Global_Append(MAKEFLAGS, "-j");
1252 Global_Append(MAKEFLAGS, value);
1253 }
1254
1255 opts.maxJobs = n;
1256 maxJobTokens = opts.maxJobs;
1257 forceJobs = true;
1258 free(value);
1259 }
1260
1261 /*
1262 * For compatibility, look at the directories in the VPATH variable
1263 * and add them to the search path, if the variable is defined. The
1264 * variable's value is in the same format as the PATH environment
1265 * variable, i.e. <directory>:<directory>:<directory>...
1266 */
1267 static void
InitVpath(void)1268 InitVpath(void)
1269 {
1270 char *vpath, savec, *path;
1271 if (!Var_Exists(SCOPE_CMDLINE, "VPATH"))
1272 return;
1273
1274 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath);
1275 /* TODO: handle errors */
1276 path = vpath;
1277 do {
1278 char *cp;
1279 /* skip to end of directory */
1280 for (cp = path; *cp != ':' && *cp != '\0'; cp++)
1281 continue;
1282 /* Save terminator character so know when to stop */
1283 savec = *cp;
1284 *cp = '\0';
1285 /* Add directory to search path */
1286 (void)SearchPath_Add(&dirSearchPath, path);
1287 *cp = savec;
1288 path = cp + 1;
1289 } while (savec == ':');
1290 free(vpath);
1291 }
1292
1293 static void
ReadAllMakefiles(const StringList * makefiles)1294 ReadAllMakefiles(const StringList *makefiles)
1295 {
1296 StringListNode *ln;
1297
1298 for (ln = makefiles->first; ln != NULL; ln = ln->next) {
1299 const char *fname = ln->datum;
1300 if (!ReadMakefile(fname))
1301 Fatal("%s: cannot open %s.", progname, fname);
1302 }
1303 }
1304
1305 static void
ReadFirstDefaultMakefile(void)1306 ReadFirstDefaultMakefile(void)
1307 {
1308 StringList makefiles = LST_INIT;
1309 StringListNode *ln;
1310 char *prefs;
1311
1312 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}",
1313 SCOPE_CMDLINE, VARE_WANTRES, &prefs);
1314 /* TODO: handle errors */
1315
1316 (void)str2Lst_Append(&makefiles, prefs);
1317
1318 for (ln = makefiles.first; ln != NULL; ln = ln->next)
1319 if (ReadMakefile(ln->datum))
1320 break;
1321
1322 Lst_Done(&makefiles);
1323 free(prefs);
1324 }
1325
1326 /*
1327 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS.
1328 * Initialize a few modules.
1329 * Parse the arguments from MAKEFLAGS and the command line.
1330 */
1331 static void
main_Init(int argc,char ** argv)1332 main_Init(int argc, char **argv)
1333 {
1334 struct stat sa;
1335 const char *machine;
1336 const char *machine_arch;
1337 char *syspath = getenv("MAKESYSPATH");
1338 struct utsname utsname;
1339
1340 /* default to writing debug to stderr */
1341 opts.debug_file = stderr;
1342
1343 Str_Intern_Init();
1344 HashTable_Init(&cached_realpaths);
1345
1346 #ifdef SIGINFO
1347 (void)bmake_signal(SIGINFO, siginfo);
1348 #endif
1349
1350 InitRandom();
1351
1352 progname = str_basename(argv[0]);
1353
1354 UnlimitFiles();
1355
1356 if (uname(&utsname) == -1) {
1357 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
1358 strerror(errno));
1359 exit(2);
1360 }
1361
1362 /*
1363 * Get the name of this type of MACHINE from utsname
1364 * so we can share an executable for similar machines.
1365 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
1366 *
1367 * Note that both MACHINE and MACHINE_ARCH are decided at
1368 * run-time.
1369 */
1370 machine = InitVarMachine(&utsname);
1371 machine_arch = InitVarMachineArch();
1372
1373 myPid = getpid(); /* remember this for vFork() */
1374
1375 /*
1376 * Just in case MAKEOBJDIR wants us to do something tricky.
1377 */
1378 Targ_Init();
1379 Var_Init();
1380 Global_Set(".MAKE.OS", utsname.sysname);
1381 Global_Set("MACHINE", machine);
1382 Global_Set("MACHINE_ARCH", machine_arch);
1383 #ifdef MAKE_VERSION
1384 Global_Set("MAKE_VERSION", MAKE_VERSION);
1385 #endif
1386 Global_Set(".newline", "\n"); /* handy for :@ loops */
1387 #ifndef MAKEFILE_PREFERENCE_LIST
1388 /* This is the traditional preference for makefiles. */
1389 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
1390 #endif
1391 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST);
1392 Global_Set(MAKE_DEPENDFILE, ".depend");
1393
1394 CmdOpts_Init();
1395 allPrecious = false; /* Remove targets when interrupted */
1396 deleteOnError = false; /* Historical default behavior */
1397 jobsRunning = false;
1398
1399 maxJobTokens = opts.maxJobs;
1400 ignorePWD = false;
1401
1402 /*
1403 * Initialize the parsing, directory and variable modules to prepare
1404 * for the reading of inclusion paths and variable settings on the
1405 * command line
1406 */
1407
1408 /*
1409 * Initialize various variables.
1410 * MAKE also gets this name, for compatibility
1411 * .MAKEFLAGS gets set to the empty string just in case.
1412 * MFLAGS also gets initialized empty, for compatibility.
1413 */
1414 Parse_Init();
1415 InitVarMake(argv[0]);
1416 Global_Set(MAKEFLAGS, "");
1417 Global_Set(MAKEOVERRIDES, "");
1418 Global_Set("MFLAGS", "");
1419 Global_Set(".ALLTARGETS", "");
1420 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV);
1421
1422 /* Set some other useful variables. */
1423 {
1424 char buf[64], *ep = getenv(MAKE_LEVEL_ENV);
1425
1426 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0;
1427 if (makelevel < 0)
1428 makelevel = 0;
1429 snprintf(buf, sizeof buf, "%d", makelevel);
1430 Global_Set(MAKE_LEVEL, buf);
1431 snprintf(buf, sizeof buf, "%u", myPid);
1432 Global_Set(".MAKE.PID", buf);
1433 snprintf(buf, sizeof buf, "%u", getppid());
1434 Global_Set(".MAKE.PPID", buf);
1435 snprintf(buf, sizeof buf, "%u", getuid());
1436 Global_Set(".MAKE.UID", buf);
1437 snprintf(buf, sizeof buf, "%u", getgid());
1438 Global_Set(".MAKE.GID", buf);
1439 }
1440 if (makelevel > 0) {
1441 char pn[1024];
1442 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel);
1443 progname = bmake_strdup(pn);
1444 }
1445
1446 #ifdef USE_META
1447 meta_init();
1448 #endif
1449 Dir_Init();
1450
1451 #ifdef POSIX
1452 {
1453 char *makeflags = explode(getenv("MAKEFLAGS"));
1454 Main_ParseArgLine(makeflags);
1455 free(makeflags);
1456 }
1457 #else
1458 /*
1459 * First snag any flags out of the MAKE environment variable.
1460 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
1461 * in a different format).
1462 */
1463 Main_ParseArgLine(getenv("MAKE"));
1464 #endif
1465
1466 if (getcwd(curdir, MAXPATHLEN) == NULL) {
1467 (void)fprintf(stderr, "%s: getcwd: %s.\n",
1468 progname, strerror(errno));
1469 exit(2);
1470 }
1471
1472 MainParseArgs(argc, argv);
1473
1474 if (opts.enterFlag)
1475 printf("%s: Entering directory `%s'\n", progname, curdir);
1476
1477 if (stat(curdir, &sa) == -1) {
1478 (void)fprintf(stderr, "%s: %s: %s.\n",
1479 progname, curdir, strerror(errno));
1480 exit(2);
1481 }
1482
1483 #ifndef NO_PWD_OVERRIDE
1484 HandlePWD(&sa);
1485 #endif
1486 Global_Set(".CURDIR", curdir);
1487
1488 InitObjdir(machine, machine_arch);
1489
1490 Arch_Init();
1491 Suff_Init();
1492 Trace_Init(tracefile);
1493
1494 defaultNode = NULL;
1495 (void)time(&now);
1496
1497 Trace_Log(MAKESTART, NULL);
1498
1499 InitVarTargets();
1500
1501 InitDefSysIncPath(syspath);
1502 }
1503
1504 /*
1505 * Read the system makefile followed by either makefile, Makefile or the
1506 * files given by the -f option. Exit on parse errors.
1507 */
1508 static void
main_ReadFiles(void)1509 main_ReadFiles(void)
1510 {
1511
1512 if (!opts.noBuiltins)
1513 ReadBuiltinRules();
1514
1515 if (!Lst_IsEmpty(&opts.makefiles))
1516 ReadAllMakefiles(&opts.makefiles);
1517 else
1518 ReadFirstDefaultMakefile();
1519 }
1520
1521 /* Compute the dependency graph. */
1522 static void
main_PrepareMaking(void)1523 main_PrepareMaking(void)
1524 {
1525 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
1526 if (!opts.noBuiltins || opts.printVars == PVM_NONE) {
1527 (void)Var_Subst("${.MAKE.DEPENDFILE}",
1528 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile);
1529 if (makeDependfile[0] != '\0') {
1530 /* TODO: handle errors */
1531 doing_depend = true;
1532 (void)ReadMakefile(makeDependfile);
1533 doing_depend = false;
1534 }
1535 }
1536
1537 if (enterFlagObj)
1538 printf("%s: Entering directory `%s'\n", progname, objdir);
1539
1540 MakeMode();
1541
1542 {
1543 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS);
1544 Global_Append("MFLAGS", makeflags.str);
1545 FStr_Done(&makeflags);
1546 }
1547
1548 InitMaxJobs();
1549
1550 if (!opts.compatMake && !forceJobs)
1551 opts.compatMake = true;
1552
1553 if (!opts.compatMake)
1554 Job_ServerStart(maxJobTokens, jp_0, jp_1);
1555 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
1556 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0);
1557
1558 if (opts.printVars == PVM_NONE)
1559 Main_ExportMAKEFLAGS(true); /* initial export */
1560
1561 InitVpath();
1562
1563 /*
1564 * Now that all search paths have been read for suffixes et al, it's
1565 * time to add the default search path to their lists...
1566 */
1567 Suff_ExtendPaths();
1568
1569 /*
1570 * Propagate attributes through :: dependency lists.
1571 */
1572 Targ_Propagate();
1573
1574 /* print the initial graph, if the user requested it */
1575 if (DEBUG(GRAPH1))
1576 Targ_PrintGraph(1);
1577 }
1578
1579 /*
1580 * Make the targets.
1581 * If the -v or -V options are given, print variables instead.
1582 * Return whether any of the targets is out-of-date.
1583 */
1584 static bool
main_Run(void)1585 main_Run(void)
1586 {
1587 if (opts.printVars != PVM_NONE) {
1588 /* print the values of any variables requested by the user */
1589 doPrintVars();
1590 return false;
1591 } else {
1592 return runTargets();
1593 }
1594 }
1595
1596 /* Clean up after making the targets. */
1597 static void
main_CleanUp(void)1598 main_CleanUp(void)
1599 {
1600 #ifdef CLEANUP
1601 Lst_DoneCall(&opts.variables, free);
1602 Lst_DoneCall(&opts.makefiles, free);
1603 Lst_DoneCall(&opts.create, free);
1604 #endif
1605
1606 if (DEBUG(GRAPH2))
1607 Targ_PrintGraph(2);
1608
1609 Trace_Log(MAKEEND, NULL);
1610
1611 if (enterFlagObj)
1612 printf("%s: Leaving directory `%s'\n", progname, objdir);
1613 if (opts.enterFlag)
1614 printf("%s: Leaving directory `%s'\n", progname, curdir);
1615
1616 #ifdef USE_META
1617 meta_finish();
1618 #endif
1619 Suff_End();
1620 Targ_End();
1621 Arch_End();
1622 Var_End();
1623 Parse_End();
1624 Dir_End();
1625 Job_End();
1626 Trace_End();
1627 Str_Intern_End();
1628 }
1629
1630 /* Determine the exit code. */
1631 static int
main_Exit(bool outOfDate)1632 main_Exit(bool outOfDate)
1633 {
1634 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0))
1635 return 2; /* Not 1 so -q can distinguish error */
1636 return outOfDate ? 1 : 0;
1637 }
1638
1639 int
main(int argc,char ** argv)1640 main(int argc, char **argv)
1641 {
1642 bool outOfDate;
1643
1644 main_Init(argc, argv);
1645 main_ReadFiles();
1646 main_PrepareMaking();
1647 outOfDate = main_Run();
1648 main_CleanUp();
1649 return main_Exit(outOfDate);
1650 }
1651
1652 /*
1653 * Open and parse the given makefile, with all its side effects.
1654 * Return false if the file could not be opened.
1655 */
1656 static bool
ReadMakefile(const char * fname)1657 ReadMakefile(const char *fname)
1658 {
1659 int fd;
1660 char *name, *path = NULL;
1661
1662 if (strcmp(fname, "-") == 0) {
1663 Parse_File("(stdin)", -1);
1664 Var_Set(SCOPE_INTERNAL, "MAKEFILE", "");
1665 } else {
1666 /* if we've chdir'd, rebuild the path name */
1667 if (strcmp(curdir, objdir) != 0 && *fname != '/') {
1668 path = str_concat3(curdir, "/", fname);
1669 fd = open(path, O_RDONLY);
1670 if (fd != -1) {
1671 fname = path;
1672 goto found;
1673 }
1674 free(path);
1675
1676 /* If curdir failed, try objdir (ala .depend) */
1677 path = str_concat3(objdir, "/", fname);
1678 fd = open(path, O_RDONLY);
1679 if (fd != -1) {
1680 fname = path;
1681 goto found;
1682 }
1683 } else {
1684 fd = open(fname, O_RDONLY);
1685 if (fd != -1)
1686 goto found;
1687 }
1688 /* look in -I and system include directories. */
1689 name = Dir_FindFile(fname, parseIncPath);
1690 if (name == NULL) {
1691 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs)
1692 ? defSysIncPath : sysIncPath;
1693 name = Dir_FindFile(fname, sysInc);
1694 }
1695 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) {
1696 free(name);
1697 free(path);
1698 return false;
1699 }
1700 fname = name;
1701 /*
1702 * set the MAKEFILE variable desired by System V fans -- the
1703 * placement of the setting here means it gets set to the last
1704 * makefile specified, as it is set by SysV make.
1705 */
1706 found:
1707 if (!doing_depend)
1708 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname);
1709 Parse_File(fname, fd);
1710 }
1711 free(path);
1712 return true;
1713 }
1714
1715 /*
1716 * Execute the command in cmd, and return its output (only stdout, not
1717 * stderr, possibly empty). In the output, replace newlines with spaces.
1718 */
1719 char *
Cmd_Exec(const char * cmd,char ** error)1720 Cmd_Exec(const char *cmd, char **error)
1721 {
1722 const char *args[4]; /* Arguments for invoking the shell */
1723 int pipefds[2];
1724 int cpid; /* Child PID */
1725 int pid; /* PID from wait() */
1726 int status; /* command exit status */
1727 Buffer buf; /* buffer to store the result */
1728 ssize_t bytes_read;
1729 char *output;
1730 char *cp;
1731 int saved_errno;
1732
1733 if (shellName == NULL)
1734 Shell_Init();
1735
1736 args[0] = shellName;
1737 args[1] = "-c";
1738 args[2] = cmd;
1739 args[3] = NULL;
1740 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd);
1741
1742 if (pipe(pipefds) == -1) {
1743 *error = str_concat3(
1744 "Couldn't create pipe for \"", cmd, "\"");
1745 return bmake_strdup("");
1746 }
1747
1748 Var_ReexportVars();
1749
1750 switch (cpid = vfork()) {
1751 case 0:
1752 (void)close(pipefds[0]);
1753 (void)dup2(pipefds[1], STDOUT_FILENO);
1754 (void)close(pipefds[1]);
1755
1756 (void)execv(shellPath, UNCONST(args));
1757 _exit(1);
1758 /* NOTREACHED */
1759
1760 case -1:
1761 *error = str_concat3("Couldn't exec \"", cmd, "\"");
1762 return bmake_strdup("");
1763 }
1764
1765 (void)close(pipefds[1]); /* No need for the writing half */
1766
1767 saved_errno = 0;
1768 Buf_Init(&buf);
1769
1770 do {
1771 char result[BUFSIZ];
1772 bytes_read = read(pipefds[0], result, sizeof result);
1773 if (bytes_read > 0)
1774 Buf_AddBytes(&buf, result, (size_t)bytes_read);
1775 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR));
1776 if (bytes_read == -1)
1777 saved_errno = errno;
1778
1779 (void)close(pipefds[0]); /* Close the input side of the pipe. */
1780
1781 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0)
1782 JobReapChild(pid, status, false);
1783
1784 if (Buf_EndsWith(&buf, '\n'))
1785 buf.data[buf.len - 1] = '\0';
1786
1787 output = Buf_DoneData(&buf);
1788 for (cp = output; *cp != '\0'; cp++)
1789 if (*cp == '\n')
1790 *cp = ' ';
1791
1792 if (WIFSIGNALED(status))
1793 *error = str_concat3("\"", cmd, "\" exited on a signal");
1794 else if (WEXITSTATUS(status) != 0)
1795 *error = str_concat3(
1796 "\"", cmd, "\" returned non-zero status");
1797 else if (saved_errno != 0)
1798 *error = str_concat3(
1799 "Couldn't read shell's output for \"", cmd, "\"");
1800 else
1801 *error = NULL;
1802 return output;
1803 }
1804
1805 /*
1806 * Print a printf-style error message.
1807 *
1808 * In default mode, this error message has no consequences, for compatibility
1809 * reasons, in particular it does not affect the exit status. Only in lint
1810 * mode (-dL) it does.
1811 */
1812 void
Error(const char * fmt,...)1813 Error(const char *fmt, ...)
1814 {
1815 va_list ap;
1816 FILE *f;
1817
1818 f = opts.debug_file;
1819 if (f == stdout)
1820 f = stderr;
1821 (void)fflush(stdout);
1822
1823 for (;;) {
1824 fprintf(f, "%s: ", progname);
1825 va_start(ap, fmt);
1826 (void)vfprintf(f, fmt, ap);
1827 va_end(ap);
1828 (void)fprintf(f, "\n");
1829 (void)fflush(f);
1830 if (f == stderr)
1831 break;
1832 f = stderr;
1833 }
1834 main_errors++;
1835 }
1836
1837 /*
1838 * Wait for any running jobs to finish, then produce an error message,
1839 * finally exit immediately.
1840 *
1841 * Exiting immediately differs from Parse_Error, which exits only after the
1842 * current top-level makefile has been parsed completely.
1843 */
1844 void
Fatal(const char * fmt,...)1845 Fatal(const char *fmt, ...)
1846 {
1847 va_list ap;
1848
1849 if (jobsRunning)
1850 Job_Wait();
1851
1852 (void)fflush(stdout);
1853 va_start(ap, fmt);
1854 (void)vfprintf(stderr, fmt, ap);
1855 va_end(ap);
1856 (void)fprintf(stderr, "\n");
1857 (void)fflush(stderr);
1858 PrintStackTrace(true);
1859
1860 PrintOnError(NULL, "\n");
1861
1862 if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
1863 Targ_PrintGraph(2);
1864 Trace_Log(MAKEERROR, NULL);
1865 exit(2); /* Not 1 so -q can distinguish error */
1866 }
1867
1868 /*
1869 * Major exception once jobs are being created.
1870 * Kills all jobs, prints a message and exits.
1871 */
1872 void
Punt(const char * fmt,...)1873 Punt(const char *fmt, ...)
1874 {
1875 va_list ap;
1876
1877 (void)fflush(stdout);
1878 (void)fprintf(stderr, "%s: ", progname);
1879 va_start(ap, fmt);
1880 (void)vfprintf(stderr, fmt, ap);
1881 va_end(ap);
1882 (void)fprintf(stderr, "\n");
1883 (void)fflush(stderr);
1884
1885 PrintOnError(NULL, "\n");
1886
1887 DieHorribly();
1888 }
1889
1890 /* Exit without giving a message. */
1891 void
DieHorribly(void)1892 DieHorribly(void)
1893 {
1894 if (jobsRunning)
1895 Job_AbortAll();
1896 if (DEBUG(GRAPH2))
1897 Targ_PrintGraph(2);
1898 Trace_Log(MAKEERROR, NULL);
1899 exit(2); /* Not 1 so -q can distinguish error */
1900 }
1901
1902 /*
1903 * Called when aborting due to errors in child shell to signal abnormal exit.
1904 * The program exits.
1905 * Errors is the number of errors encountered in Make_Make.
1906 */
1907 void
Finish(int errs)1908 Finish(int errs)
1909 {
1910 if (shouldDieQuietly(NULL, -1))
1911 exit(2);
1912 Fatal("%d error%s", errs, errs == 1 ? "" : "s");
1913 }
1914
1915 bool
unlink_file(const char * file)1916 unlink_file(const char *file)
1917 {
1918 struct stat st;
1919
1920 if (lstat(file, &st) == -1)
1921 return false;
1922
1923 if (S_ISDIR(st.st_mode)) {
1924 errno = EISDIR;
1925 return false;
1926 }
1927 return unlink(file) == 0;
1928 }
1929
1930 static void
write_all(int fd,const void * data,size_t n)1931 write_all(int fd, const void *data, size_t n)
1932 {
1933 const char *mem = data;
1934
1935 while (n > 0) {
1936 ssize_t written = write(fd, mem, n);
1937 /* XXX: Should this EAGAIN be EINTR? */
1938 if (written == -1 && errno == EAGAIN)
1939 continue;
1940 if (written == -1)
1941 break;
1942 mem += written;
1943 n -= (size_t)written;
1944 }
1945 }
1946
1947 /* Print why exec failed, avoiding stdio. */
1948 void MAKE_ATTR_DEAD
execDie(const char * af,const char * av)1949 execDie(const char *af, const char *av)
1950 {
1951 Buffer buf;
1952
1953 Buf_Init(&buf);
1954 Buf_AddStr(&buf, progname);
1955 Buf_AddStr(&buf, ": ");
1956 Buf_AddStr(&buf, af);
1957 Buf_AddStr(&buf, "(");
1958 Buf_AddStr(&buf, av);
1959 Buf_AddStr(&buf, ") failed (");
1960 Buf_AddStr(&buf, strerror(errno));
1961 Buf_AddStr(&buf, ")\n");
1962
1963 write_all(STDERR_FILENO, buf.data, buf.len);
1964
1965 Buf_Done(&buf);
1966 _exit(1);
1967 }
1968
1969 static void
purge_relative_cached_realpaths(void)1970 purge_relative_cached_realpaths(void)
1971 {
1972 HashEntry *he, *nhe;
1973 HashIter hi;
1974
1975 HashIter_Init(&hi, &cached_realpaths);
1976 he = HashIter_Next(&hi);
1977 while (he != NULL) {
1978 nhe = HashIter_Next(&hi);
1979 if (he->key[0] != '/') {
1980 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key);
1981 HashTable_DeleteEntry(&cached_realpaths, he);
1982 /*
1983 * XXX: What about the allocated he->value? Either
1984 * free them or document why they cannot be freed.
1985 */
1986 }
1987 he = nhe;
1988 }
1989 }
1990
1991 const char *
cached_realpath(const char * pathname,char * resolved)1992 cached_realpath(const char *pathname, char *resolved)
1993 {
1994 const char *rp;
1995
1996 if (pathname == NULL || pathname[0] == '\0')
1997 return NULL;
1998
1999 rp = HashTable_FindValue(&cached_realpaths, pathname);
2000 if (rp != NULL) {
2001 /* a hit */
2002 strncpy(resolved, rp, MAXPATHLEN);
2003 resolved[MAXPATHLEN - 1] = '\0';
2004 return resolved;
2005 }
2006
2007 rp = realpath(pathname, resolved);
2008 if (rp != NULL) {
2009 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp));
2010 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp);
2011 return resolved;
2012 }
2013
2014 /* should we negative-cache? */
2015 return NULL;
2016 }
2017
2018 /*
2019 * Return true if we should die without noise.
2020 * For example our failing child was a sub-make or failure happened elsewhere.
2021 */
2022 bool
shouldDieQuietly(GNode * gn,int bf)2023 shouldDieQuietly(GNode *gn, int bf)
2024 {
2025 static int quietly = -1;
2026
2027 if (quietly < 0) {
2028 if (DEBUG(JOB) ||
2029 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true))
2030 quietly = 0;
2031 else if (bf >= 0)
2032 quietly = bf;
2033 else
2034 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0;
2035 }
2036 return quietly != 0;
2037 }
2038
2039 static void
SetErrorVars(GNode * gn)2040 SetErrorVars(GNode *gn)
2041 {
2042 StringListNode *ln;
2043
2044 /*
2045 * We can print this even if there is no .ERROR target.
2046 */
2047 Global_Set(".ERROR_TARGET", gn->name);
2048 Global_Delete(".ERROR_CMD");
2049
2050 for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
2051 const char *cmd = ln->datum;
2052
2053 if (cmd == NULL)
2054 break;
2055 Global_Append(".ERROR_CMD", cmd);
2056 }
2057 }
2058
2059 /*
2060 * Print some helpful information in case of an error.
2061 * The caller should exit soon after calling this function.
2062 */
2063 void
PrintOnError(GNode * gn,const char * msg)2064 PrintOnError(GNode *gn, const char *msg)
2065 {
2066 static GNode *errorNode = NULL;
2067
2068 if (DEBUG(HASH)) {
2069 Targ_Stats();
2070 Var_Stats();
2071 }
2072
2073 if (errorNode != NULL)
2074 return; /* we've been here! */
2075
2076 printf("%s%s: stopped in %s\n", msg, progname, curdir);
2077
2078 /* we generally want to keep quiet if a sub-make died */
2079 if (shouldDieQuietly(gn, -1))
2080 return;
2081
2082 if (gn != NULL)
2083 SetErrorVars(gn);
2084
2085 {
2086 char *errorVarsValues;
2087 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
2088 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues);
2089 /* TODO: handle errors */
2090 printf("%s", errorVarsValues);
2091 free(errorVarsValues);
2092 }
2093
2094 fflush(stdout);
2095
2096 /*
2097 * Finally, see if there is a .ERROR target, and run it if so.
2098 */
2099 errorNode = Targ_FindNode(".ERROR");
2100 if (errorNode != NULL) {
2101 errorNode->type |= OP_SPECIAL;
2102 Compat_Make(errorNode, errorNode);
2103 }
2104 }
2105
2106 void
Main_ExportMAKEFLAGS(bool first)2107 Main_ExportMAKEFLAGS(bool first)
2108 {
2109 static bool once = true;
2110 char *flags;
2111
2112 if (once != first)
2113 return;
2114 once = false;
2115
2116 (void)Var_Subst(
2117 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
2118 SCOPE_CMDLINE, VARE_WANTRES, &flags);
2119 /* TODO: handle errors */
2120 if (flags[0] != '\0') {
2121 #ifdef POSIX
2122 setenv("MAKEFLAGS", flags, 1);
2123 #else
2124 setenv("MAKE", flags, 1);
2125 #endif
2126 }
2127 }
2128
2129 char *
getTmpdir(void)2130 getTmpdir(void)
2131 {
2132 static char *tmpdir = NULL;
2133 struct stat st;
2134
2135 if (tmpdir != NULL)
2136 return tmpdir;
2137
2138 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */
2139 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/",
2140 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir);
2141 /* TODO: handle errors */
2142
2143 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
2144 free(tmpdir);
2145 tmpdir = bmake_strdup(_PATH_TMP);
2146 }
2147 return tmpdir;
2148 }
2149
2150 /*
2151 * Create and open a temp file using "pattern".
2152 * If out_fname is provided, set it to a copy of the filename created.
2153 * Otherwise unlink the file once open.
2154 */
2155 int
mkTempFile(const char * pattern,char * tfile,size_t tfile_sz)2156 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz)
2157 {
2158 static char *tmpdir = NULL;
2159 char tbuf[MAXPATHLEN];
2160 int fd;
2161
2162 if (pattern == NULL)
2163 pattern = TMPPAT;
2164 if (tmpdir == NULL)
2165 tmpdir = getTmpdir();
2166 if (tfile == NULL) {
2167 tfile = tbuf;
2168 tfile_sz = sizeof tbuf;
2169 }
2170
2171 if (pattern[0] == '/')
2172 snprintf(tfile, tfile_sz, "%s", pattern);
2173 else
2174 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern);
2175
2176 if ((fd = mkstemp(tfile)) < 0)
2177 Punt("Could not create temporary file %s: %s", tfile,
2178 strerror(errno));
2179 if (tfile == tbuf)
2180 unlink(tfile); /* we just want the descriptor */
2181
2182 return fd;
2183 }
2184
2185 /*
2186 * Convert a string representation of a boolean into a boolean value.
2187 * Anything that looks like "No", "False", "Off", "0" etc. is false,
2188 * the empty string is the fallback, everything else is true.
2189 */
2190 bool
ParseBoolean(const char * s,bool fallback)2191 ParseBoolean(const char *s, bool fallback)
2192 {
2193 char ch = ch_tolower(s[0]);
2194 if (ch == '\0')
2195 return fallback;
2196 if (ch == '0' || ch == 'f' || ch == 'n')
2197 return false;
2198 if (ch == 'o')
2199 return ch_tolower(s[1]) != 'f';
2200 return true;
2201 }
2202