source: trunk/src/kmk/main.c@ 19

Last change on this file since 19 was 9, checked in by bird, 23 years ago

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Line 
1/*
2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1989 by Berkeley Softworks
5 * 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. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)main.c 8.3 (Berkeley) 3/19/94
39 */
40
41#ifndef lint
42#if 0
43static char copyright[] =
44"@(#) Copyright (c) 1988, 1989, 1990, 1993\n\
45 The Regents of the University of California. All rights reserved.\n";
46#endif
47#endif /* not lint */
48#include <sys/cdefs.h>
49__FBSDID("$FreeBSD: src/usr.bin/make/main.c,v 1.79 2002/10/10 19:27:48 jmallett Exp $");
50
51/*-
52 * main.c --
53 * The main file for this entire program. Exit routines etc
54 * reside here.
55 *
56 * Utility functions defined in this file:
57 * Main_ParseArgLine Takes a line of arguments, breaks them and
58 * treats them as if they were given when first
59 * invoked. Used by the parse module to implement
60 * the .MFLAGS target.
61 */
62
63#include <sys/types.h>
64#include <sys/time.h>
65#include <sys/param.h>
66#include <sys/resource.h>
67#include <sys/signal.h>
68#include <sys/stat.h>
69#if defined(__i386__)
70#include <sys/sysctl.h>
71#endif
72#ifndef MACHINE
73#include <sys/utsname.h>
74#endif
75#include <sys/wait.h>
76#include <err.h>
77#include <stdlib.h>
78#include <errno.h>
79#include <fcntl.h>
80#include <stdio.h>
81#include <sysexits.h>
82#include <stdarg.h>
83#include <unistd.h>
84#include "make.h"
85#include "hash.h"
86#include "dir.h"
87#include "job.h"
88#include "pathnames.h"
89
90#define WANT_ENV_MKLVL 1
91
92#ifndef DEFMAXLOCAL
93#define DEFMAXLOCAL DEFMAXJOBS
94#endif /* DEFMAXLOCAL */
95
96#define MAKEFLAGS ".MAKEFLAGS"
97
98Lst create; /* Targets to be made */
99time_t now; /* Time at start of make */
100GNode *DEFAULT; /* .DEFAULT node */
101Boolean allPrecious; /* .PRECIOUS given on line by itself */
102
103static Boolean noBuiltins; /* -r flag */
104static Lst makefiles; /* ordered list of makefiles to read */
105static Boolean expandVars; /* fully expand printed variables */
106static Lst variables; /* list of variables to print */
107int maxJobs; /* -j argument */
108static Boolean forceJobs; /* -j argument given */
109static int maxLocal; /* -L argument */
110Boolean compatMake; /* -B argument */
111Boolean debug; /* -d flag */
112Boolean noExecute; /* -n flag */
113Boolean keepgoing; /* -k flag */
114Boolean queryFlag; /* -q flag */
115Boolean touchFlag; /* -t flag */
116Boolean usePipes; /* !-P flag */
117Boolean ignoreErrors; /* -i flag */
118Boolean beSilent; /* -s flag */
119Boolean beVerbose; /* -v flag */
120Boolean oldVars; /* variable substitution style */
121Boolean checkEnvFirst; /* -e flag */
122Lst envFirstVars; /* (-E) vars to override from env */
123Boolean jobsRunning; /* TRUE if the jobs might be running */
124
125static void MainParseArgs(int, char **);
126char * chdir_verify_path(char *, char *);
127static int ReadMakefile(void *, void *);
128static void usage(void);
129
130static char *curdir; /* startup directory */
131static char *objdir; /* where we chdir'ed to */
132
133/*-
134 * MainParseArgs --
135 * Parse a given argument vector. Called from main() and from
136 * Main_ParseArgLine() when the .MAKEFLAGS target is used.
137 *
138 * XXX: Deal with command line overriding .MAKEFLAGS in makefile
139 *
140 * Results:
141 * None
142 *
143 * Side Effects:
144 * Various global and local flags will be set depending on the flags
145 * given
146 */
147static void
148MainParseArgs(int argc, char **argv)
149{
150 char *p;
151 int c;
152
153 optind = 1; /* since we're called more than once */
154#ifdef REMOTE
155# define OPTFLAGS "BC:D:E:I:L:PSV:Xd:ef:ij:km:nqrstv"
156#else
157# define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv"
158#endif
159rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) {
160 switch(c) {
161 case 'C':
162 chdir(optarg);
163 break;
164 case 'D':
165 Var_Set(optarg, "1", VAR_GLOBAL);
166 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
167 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
168 break;
169 case 'I':
170 Parse_AddIncludeDir(optarg);
171 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
172 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
173 break;
174 case 'V':
175 (void)Lst_AtEnd(variables, (void *)optarg);
176 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
177 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
178 break;
179 case 'X':
180 expandVars = FALSE;
181 break;
182 case 'B':
183 compatMake = TRUE;
184 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
185 break;
186#ifdef REMOTE
187 case 'L': {
188 char *endptr;
189
190 maxLocal = strtol(optarg, &endptr, 10);
191 if (maxLocal < 0 || *endptr != '\0') {
192 warnx("illegal number, -L argument -- %s",
193 optarg);
194 usage();
195 }
196 Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL);
197 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
198 break;
199 }
200#endif
201 case 'P':
202 usePipes = FALSE;
203 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL);
204 break;
205 case 'S':
206 keepgoing = FALSE;
207 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
208 break;
209 case 'd': {
210 char *modules = optarg;
211
212 for (; *modules; ++modules)
213 switch (*modules) {
214 case 'A':
215 debug = ~0;
216 break;
217 case 'a':
218 debug |= DEBUG_ARCH;
219 break;
220 case 'c':
221 debug |= DEBUG_COND;
222 break;
223 case 'd':
224 debug |= DEBUG_DIR;
225 break;
226 case 'f':
227 debug |= DEBUG_FOR;
228 break;
229 case 'g':
230 if (modules[1] == '1') {
231 debug |= DEBUG_GRAPH1;
232 ++modules;
233 }
234 else if (modules[1] == '2') {
235 debug |= DEBUG_GRAPH2;
236 ++modules;
237 }
238 break;
239 case 'j':
240 debug |= DEBUG_JOB;
241 break;
242 case 'l':
243 debug |= DEBUG_LOUD;
244 break;
245 case 'm':
246 debug |= DEBUG_MAKE;
247 break;
248 case 's':
249 debug |= DEBUG_SUFF;
250 break;
251 case 't':
252 debug |= DEBUG_TARG;
253 break;
254 case 'v':
255 debug |= DEBUG_VAR;
256 break;
257 default:
258 warnx("illegal argument to d option -- %c", *modules);
259 usage();
260 }
261 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
262 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
263 break;
264 }
265 case 'E':
266 p = emalloc(strlen(optarg) + 1);
267 (void)strcpy(p, optarg);
268 (void)Lst_AtEnd(envFirstVars, (void *)p);
269 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL);
270 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
271 break;
272 case 'e':
273 checkEnvFirst = TRUE;
274 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
275 break;
276 case 'f':
277 (void)Lst_AtEnd(makefiles, (void *)optarg);
278 break;
279 case 'i':
280 ignoreErrors = TRUE;
281 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
282 break;
283 case 'j': {
284 char *endptr;
285
286 forceJobs = TRUE;
287 maxJobs = strtol(optarg, &endptr, 10);
288 if (maxJobs <= 0 || *endptr != '\0') {
289 warnx("illegal number, -j argument -- %s",
290 optarg);
291 usage();
292 }
293#ifndef REMOTE
294 maxLocal = maxJobs;
295#endif
296 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
297 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
298 break;
299 }
300 case 'k':
301 keepgoing = TRUE;
302 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
303 break;
304 case 'm':
305 Dir_AddDir(sysIncPath, optarg);
306 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
307 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
308 break;
309 case 'n':
310 noExecute = TRUE;
311 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL);
312 break;
313 case 'q':
314 queryFlag = TRUE;
315 /* Kind of nonsensical, wot? */
316 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL);
317 break;
318 case 'r':
319 noBuiltins = TRUE;
320 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL);
321 break;
322 case 's':
323 beSilent = TRUE;
324 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL);
325 break;
326 case 't':
327 touchFlag = TRUE;
328 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL);
329 break;
330 case 'v':
331 beVerbose = TRUE;
332 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL);
333 break;
334 default:
335 case '?':
336 usage();
337 }
338 }
339
340 oldVars = TRUE;
341
342 /*
343 * See if the rest of the arguments are variable assignments and
344 * perform them if so. Else take them to be targets and stuff them
345 * on the end of the "create" list.
346 */
347 for (argv += optind, argc -= optind; *argv; ++argv, --argc)
348 if (Parse_IsVar(*argv))
349 Parse_DoVar(*argv, VAR_CMD);
350 else {
351 if (!**argv)
352 Punt("illegal (null) argument.");
353 if (**argv == '-') {
354 if ((*argv)[1])
355 optind = 0; /* -flag... */
356 else
357 optind = 1; /* - */
358 goto rearg;
359 }
360 (void)Lst_AtEnd(create, (void *)estrdup(*argv));
361 }
362}
363
364/*-
365 * Main_ParseArgLine --
366 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target
367 * is encountered and by main() when reading the .MAKEFLAGS envariable.
368 * Takes a line of arguments and breaks it into its
369 * component words and passes those words and the number of them to the
370 * MainParseArgs function.
371 * The line should have all its leading whitespace removed.
372 *
373 * Results:
374 * None
375 *
376 * Side Effects:
377 * Only those that come from the various arguments.
378 */
379void
380Main_ParseArgLine(char *line)
381{
382 char **argv; /* Manufactured argument vector */
383 int argc; /* Number of arguments in argv */
384
385 if (line == NULL)
386 return;
387 for (; *line == ' '; ++line)
388 continue;
389 if (!*line)
390 return;
391
392 argv = brk_string(line, &argc, TRUE);
393 MainParseArgs(argc, argv);
394}
395
396char *
397chdir_verify_path(char *path, char *obpath)
398{
399 struct stat sb;
400
401 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
402 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) {
403 warn("warning: %s", path);
404 return 0;
405 }
406 return obpath;
407 }
408
409 return 0;
410}
411
412
413/*-
414 * main --
415 * The main function, for obvious reasons. Initializes variables
416 * and a few modules, then parses the arguments give it in the
417 * environment and on the command line. Reads the system makefile
418 * followed by either Makefile, makefile or the file given by the
419 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the
420 * flags it has received by then uses either the Make or the Compat
421 * module to create the initial list of targets.
422 *
423 * Results:
424 * If -q was given, exits -1 if anything was out-of-date. Else it exits
425 * 0.
426 *
427 * Side Effects:
428 * The program exits when done. Targets are created. etc. etc. etc.
429 */
430int
431main(int argc, char **argv)
432{
433 Lst targs; /* target nodes to create -- passed to Make_Init */
434 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */
435 struct stat sa;
436 char *p, *p1, *path, *pathp;
437#ifdef WANT_ENV_MKLVL
438#define MKLVL_MAXVAL 500
439#define MKLVL_ENVVAR "__MKLVL__"
440 int iMkLvl = 0;
441 char *szMkLvl = getenv(MKLVL_ENVVAR);
442#endif /* WANT_ENV_MKLVL */
443 char mdpath[MAXPATHLEN];
444 char obpath[MAXPATHLEN];
445 char cdpath[MAXPATHLEN];
446 char *machine = getenv("MACHINE");
447 char *machine_arch = getenv("MACHINE_ARCH");
448 char *machine_cpu = getenv("MACHINE_CPU");
449 Lst sysMkPath; /* Path of sys.mk */
450 char *cp = NULL, *start;
451 /* avoid faults on read-only strings */
452 static char syspath[] = _PATH_DEFSYSPATH;
453
454#ifdef WANT_ENV_MKLVL
455 if ((iMkLvl = szMkLvl ? atoi(szMkLvl) : 0) < 0) {
456 iMkLvl = 0;
457 }
458 if (iMkLvl++ > MKLVL_MAXVAL) {
459 errc(2, EAGAIN,
460 "Max recursion level (%d) exceeded.", MKLVL_MAXVAL);
461 }
462 bzero(szMkLvl = emalloc(32), 32);
463 sprintf(szMkLvl, "%d", iMkLvl);
464 setenv(MKLVL_ENVVAR, szMkLvl, 1);
465#endif /* WANT_ENV_MKLVL */
466
467#if DEFSHELL == 2
468 /*
469 * Turn off ENV to make ksh happier.
470 */
471 unsetenv("ENV");
472#endif
473
474#ifdef RLIMIT_NOFILE
475 /*
476 * get rid of resource limit on file descriptors
477 */
478 {
479 struct rlimit rl;
480 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
481 rl.rlim_cur != rl.rlim_max) {
482 rl.rlim_cur = rl.rlim_max;
483 (void) setrlimit(RLIMIT_NOFILE, &rl);
484 }
485 }
486#endif
487 /*
488 * Find where we are...
489 * All this code is so that we know where we are when we start up
490 * on a different machine with pmake.
491 */
492 curdir = cdpath;
493 if (getcwd(curdir, MAXPATHLEN) == NULL)
494 err(2, NULL);
495
496 if (stat(curdir, &sa) == -1)
497 err(2, "%s", curdir);
498
499#if defined(__i386__) && defined(__FreeBSD_version) && \
500 __FreeBSD_version > 300003
501 /*
502 * PC-98 kernel sets the `i386' string to the utsname.machine and
503 * it cannot be distinguished from IBM-PC by uname(3). Therefore,
504 * we check machine.ispc98 and adjust the machine variable before
505 * using usname(3) below.
506 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time,
507 * __FreeBSD_version was defined as 300003. So, this check can
508 * safely be done with any kernel with version > 300003.
509 */
510 if (!machine) {
511 int ispc98;
512 size_t len;
513
514 len = sizeof(ispc98);
515 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) {
516 if (ispc98)
517 machine = "pc98";
518 }
519 }
520#endif
521
522 /*
523 * Get the name of this type of MACHINE from utsname
524 * so we can share an executable for similar machines.
525 * (i.e. m68k: amiga hp300, mac68k, sun3, ...)
526 *
527 * Note that while MACHINE is decided at run-time,
528 * MACHINE_ARCH is always known at compile time.
529 */
530 if (!machine) {
531#ifndef MACHINE
532 struct utsname utsname;
533
534 if (uname(&utsname) == -1)
535 err(2, "uname");
536 machine = utsname.machine;
537#else
538 machine = MACHINE;
539#endif
540 }
541
542 if (!machine_arch) {
543#ifndef MACHINE_ARCH
544 machine_arch = "unknown";
545#else
546 machine_arch = MACHINE_ARCH;
547#endif
548 }
549
550 /*
551 * Set machine_cpu to the minumum supported CPU revision based
552 * on the target architecture, if not already set.
553 */
554 if (!machine_cpu) {
555 if (!strcmp(machine_arch, "i386"))
556 machine_cpu = "i386";
557 else if (!strcmp(machine_arch, "alpha"))
558 machine_cpu = "ev4";
559 else
560 machine_cpu = "unknown";
561 }
562
563 /*
564 * The object directory location is determined using the
565 * following order of preference:
566 *
567 * 1. MAKEOBJDIRPREFIX`cwd`
568 * 2. MAKEOBJDIR
569 * 3. _PATH_OBJDIR.${MACHINE}
570 * 4. _PATH_OBJDIR
571 * 5. _PATH_OBJDIRPREFIX`cwd`
572 *
573 * If one of the first two fails, use the current directory.
574 * If the remaining three all fail, use the current directory.
575 *
576 * Once things are initted,
577 * have to add the original directory to the search path,
578 * and modify the paths for the Makefiles apropriately. The
579 * current directory is also placed as a variable for make scripts.
580 */
581 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) {
582 if (!(path = getenv("MAKEOBJDIR"))) {
583 path = _PATH_OBJDIR;
584 pathp = _PATH_OBJDIRPREFIX;
585 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s",
586 path, machine);
587 if (!(objdir = chdir_verify_path(mdpath, obpath)))
588 if (!(objdir=chdir_verify_path(path, obpath))) {
589 (void) snprintf(mdpath, MAXPATHLEN,
590 "%s%s", pathp, curdir);
591 if (!(objdir=chdir_verify_path(mdpath,
592 obpath)))
593 objdir = curdir;
594 }
595 }
596 else if (!(objdir = chdir_verify_path(path, obpath)))
597 objdir = curdir;
598 }
599 else {
600 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir);
601 if (!(objdir = chdir_verify_path(mdpath, obpath)))
602 objdir = curdir;
603 }
604
605 create = Lst_Init(FALSE);
606 makefiles = Lst_Init(FALSE);
607 envFirstVars = Lst_Init(FALSE);
608 expandVars = TRUE;
609 variables = Lst_Init(FALSE);
610 beSilent = FALSE; /* Print commands as executed */
611 ignoreErrors = FALSE; /* Pay attention to non-zero returns */
612 noExecute = FALSE; /* Execute all commands */
613 keepgoing = FALSE; /* Stop on error */
614 allPrecious = FALSE; /* Remove targets when interrupted */
615 queryFlag = FALSE; /* This is not just a check-run */
616 noBuiltins = FALSE; /* Read the built-in rules */
617 touchFlag = FALSE; /* Actually update targets */
618 usePipes = TRUE; /* Catch child output in pipes */
619 debug = 0; /* No debug verbosity, please. */
620 jobsRunning = FALSE;
621
622 maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */
623#ifdef REMOTE
624 maxJobs = DEFMAXJOBS; /* Set default max concurrency */
625#else
626 maxJobs = maxLocal;
627#endif
628 forceJobs = FALSE; /* No -j flag */
629 compatMake = FALSE; /* No compat mode */
630
631
632 /*
633 * Initialize the parsing, directory and variable modules to prepare
634 * for the reading of inclusion paths and variable settings on the
635 * command line
636 */
637 Dir_Init(); /* Initialize directory structures so -I flags
638 * can be processed correctly */
639 Parse_Init(); /* Need to initialize the paths of #include
640 * directories */
641 Var_Init(); /* As well as the lists of variables for
642 * parsing arguments */
643 str_init();
644 if (objdir != curdir)
645 Dir_AddDir(dirSearchPath, curdir);
646 Var_Set(".CURDIR", curdir, VAR_GLOBAL);
647 Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
648
649 /*
650 * Initialize various variables.
651 * MAKE also gets this name, for compatibility
652 * .MAKEFLAGS gets set to the empty string just in case.
653 * MFLAGS also gets initialized empty, for compatibility.
654 */
655 Var_Set("MAKE", argv[0], VAR_GLOBAL);
656 Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
657 Var_Set("MFLAGS", "", VAR_GLOBAL);
658 Var_Set("MACHINE", machine, VAR_GLOBAL);
659 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
660 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL);
661#ifdef MAKE_VERSION
662 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL);
663#endif
664
665 /*
666 * First snag any flags out of the MAKE environment variable.
667 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
668 * in a different format).
669 */
670#ifdef POSIX
671 Main_ParseArgLine(getenv("MAKEFLAGS"));
672#else
673 Main_ParseArgLine(getenv("MAKE"));
674#endif
675
676 MainParseArgs(argc, argv);
677
678 /*
679 * Be compatible if user did not specify -j and did not explicitly
680 * turned compatibility on
681 */
682 if (!compatMake && !forceJobs)
683 compatMake = TRUE;
684
685 /*
686 * Initialize archive, target and suffix modules in preparation for
687 * parsing the makefile(s)
688 */
689 Arch_Init();
690 Targ_Init();
691 Suff_Init();
692
693 DEFAULT = NULL;
694 (void)time(&now);
695
696 /*
697 * Set up the .TARGETS variable to contain the list of targets to be
698 * created. If none specified, make the variable empty -- the parser
699 * will fill the thing in with the default or .MAIN target.
700 */
701 if (!Lst_IsEmpty(create)) {
702 LstNode ln;
703
704 for (ln = Lst_First(create); ln != NULL;
705 ln = Lst_Succ(ln)) {
706 char *name = (char *)Lst_Datum(ln);
707
708 Var_Append(".TARGETS", name, VAR_GLOBAL);
709 }
710 } else
711 Var_Set(".TARGETS", "", VAR_GLOBAL);
712
713
714 /*
715 * If no user-supplied system path was given (through the -m option)
716 * add the directories from the DEFSYSPATH (more than one may be given
717 * as dir1:...:dirn) to the system include path.
718 */
719 if (Lst_IsEmpty(sysIncPath)) {
720 for (start = syspath; *start != '\0'; start = cp) {
721 for (cp = start; *cp != '\0' && *cp != ':'; cp++)
722 continue;
723 if (*cp == '\0') {
724 Dir_AddDir(sysIncPath, start);
725 } else {
726 *cp++ = '\0';
727 Dir_AddDir(sysIncPath, start);
728 }
729 }
730 }
731
732 /*
733 * Read in the built-in rules first, followed by the specified
734 * makefile, if it was (makefile != (char *) NULL), or the default
735 * Makefile and makefile, in that order, if it wasn't.
736 */
737 if (!noBuiltins) {
738 LstNode ln;
739
740 sysMkPath = Lst_Init (FALSE);
741 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath);
742 if (Lst_IsEmpty(sysMkPath))
743 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK);
744 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile);
745 if (ln != NULL)
746 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
747 }
748
749 if (!Lst_IsEmpty(makefiles)) {
750 LstNode ln;
751
752 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile);
753 if (ln != NULL)
754 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
755 } else if (!ReadMakefile("BSDmakefile", NULL))
756 if (!ReadMakefile("makefile", NULL))
757 (void)ReadMakefile("Makefile", NULL);
758
759 (void)ReadMakefile(".depend", NULL);
760
761 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
762 efree(p1);
763
764 /* Install all the flags into the MAKE envariable. */
765 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p)
766#ifdef POSIX
767 setenv("MAKEFLAGS", p, 1);
768#else
769 setenv("MAKE", p, 1);
770#endif
771 efree(p1);
772
773 /*
774 * For compatibility, look at the directories in the VPATH variable
775 * and add them to the search path, if the variable is defined. The
776 * variable's value is in the same format as the PATH envariable, i.e.
777 * <directory>:<directory>:<directory>...
778 */
779 if (Var_Exists("VPATH", VAR_CMD)) {
780 char *vpath, savec;
781 /*
782 * GCC stores string constants in read-only memory, but
783 * Var_Subst will want to write this thing, so store it
784 * in an array
785 */
786 static char VPATH[] = "${VPATH}";
787
788 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE);
789 path = vpath;
790 do {
791 /* skip to end of directory */
792 for (cp = path; *cp != ':' && *cp != '\0'; cp++)
793 continue;
794 /* Save terminator character so know when to stop */
795 savec = *cp;
796 *cp = '\0';
797 /* Add directory to search path */
798 Dir_AddDir(dirSearchPath, path);
799 *cp = savec;
800 path = cp + 1;
801 } while (savec == ':');
802 (void)free(vpath);
803 }
804
805 /*
806 * Now that all search paths have been read for suffixes et al, it's
807 * time to add the default search path to their lists...
808 */
809 Suff_DoPaths();
810
811 /* print the initial graph, if the user requested it */
812 if (DEBUG(GRAPH1))
813 Targ_PrintGraph(1);
814
815 /* print the values of any variables requested by the user */
816 if (!Lst_IsEmpty(variables)) {
817 LstNode ln;
818
819 for (ln = Lst_First(variables); ln != NULL;
820 ln = Lst_Succ(ln)) {
821 char *value;
822 if (expandVars) {
823 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3);
824 /* This sprintf is safe, because of the malloc above */
825 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln));
826 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE);
827 } else {
828 value = Var_Value((char *)Lst_Datum(ln),
829 VAR_GLOBAL, &p1);
830 }
831 printf("%s\n", value ? value : "");
832 if (p1)
833 free(p1);
834 }
835 } else {
836
837 /*
838 * Have now read the entire graph and need to make a list of targets
839 * to create. If none was given on the command line, we consult the
840 * parsing module to find the main target(s) to create.
841 */
842 if (Lst_IsEmpty(create))
843 targs = Parse_MainName();
844 else
845 targs = Targ_FindList(create, TARG_CREATE);
846
847 if (!compatMake) {
848 /*
849 * Initialize job module before traversing the graph, now that
850 * any .BEGIN and .END targets have been read. This is done
851 * only if the -q flag wasn't given (to prevent the .BEGIN from
852 * being executed should it exist).
853 */
854 if (!queryFlag) {
855 if (maxLocal == -1)
856 maxLocal = maxJobs;
857 Job_Init(maxJobs, maxLocal);
858 jobsRunning = TRUE;
859 }
860
861 /* Traverse the graph, checking on all the targets */
862 outOfDate = Make_Run(targs);
863 } else {
864 /*
865 * Compat_Init will take care of creating all the targets as
866 * well as initializing the module.
867 */
868 Compat_Run(targs);
869 }
870 Lst_Destroy(targs, NOFREE);
871 }
872
873 Lst_Destroy(variables, NOFREE);
874 Lst_Destroy(makefiles, NOFREE);
875 Lst_Destroy(create, (void (*)(void *)) free);
876
877 /* print the graph now it's been processed if the user requested it */
878 if (DEBUG(GRAPH2))
879 Targ_PrintGraph(2);
880
881 Suff_End();
882 Targ_End();
883 Arch_End();
884 str_end();
885 Var_End();
886 Parse_End();
887 Dir_End();
888
889 if (queryFlag && outOfDate)
890 return(1);
891 else
892 return(0);
893}
894
895/*-
896 * ReadMakefile --
897 * Open and parse the given makefile.
898 *
899 * Results:
900 * TRUE if ok. FALSE if couldn't open file.
901 *
902 * Side Effects:
903 * lots
904 */
905static Boolean
906ReadMakefile(void *p, void *q __unused)
907{
908 char *fname; /* makefile to read */
909 FILE *stream;
910 char *name, path[MAXPATHLEN];
911 char *MAKEFILE;
912 int setMAKEFILE;
913
914 fname = p;
915
916 if (!strcmp(fname, "-")) {
917 Parse_File("(stdin)", stdin);
918 Var_Set("MAKEFILE", "", VAR_GLOBAL);
919 } else {
920 setMAKEFILE = strcmp(fname, ".depend");
921
922 /* if we've chdir'd, rebuild the path name */
923 if (curdir != objdir && *fname != '/') {
924 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname);
925 /*
926 * XXX The realpath stuff breaks relative includes
927 * XXX in some cases. The problem likely is in
928 * XXX parse.c where it does special things in
929 * XXX ParseDoInclude if the file is relateive
930 * XXX or absolute and not a system file. There
931 * XXX it assumes that if the current file that's
932 * XXX being included is absolute, that any files
933 * XXX that it includes shouldn't do the -I path
934 * XXX stuff, which is inconsistant with historical
935 * XXX behavior. However, I can't pentrate the mists
936 * XXX further, so I'm putting this workaround in
937 * XXX here until such time as the underlying bug
938 * XXX can be fixed.
939 */
940#if THIS_BREAKS_THINGS
941 if (realpath(path, path) != NULL &&
942 (stream = fopen(path, "r")) != NULL) {
943 MAKEFILE = fname;
944 fname = path;
945 goto found;
946 }
947 } else if (realpath(fname, path) != NULL) {
948 MAKEFILE = fname;
949 fname = path;
950 if ((stream = fopen(fname, "r")) != NULL)
951 goto found;
952 }
953#else
954 if ((stream = fopen(path, "r")) != NULL) {
955 MAKEFILE = fname;
956 fname = path;
957 goto found;
958 }
959 } else {
960 MAKEFILE = fname;
961 if ((stream = fopen(fname, "r")) != NULL)
962 goto found;
963 }
964#endif
965 /* look in -I and system include directories. */
966 name = Dir_FindFile(fname, parseIncPath);
967 if (!name)
968 name = Dir_FindFile(fname, sysIncPath);
969 if (!name || !(stream = fopen(name, "r")))
970 return(FALSE);
971 MAKEFILE = fname = name;
972 /*
973 * set the MAKEFILE variable desired by System V fans -- the
974 * placement of the setting here means it gets set to the last
975 * makefile specified, as it is set by SysV make.
976 */
977found:
978 if (setMAKEFILE)
979 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL);
980 Parse_File(fname, stream);
981 (void)fclose(stream);
982 }
983 return(TRUE);
984}
985
986/*-
987 * Cmd_Exec --
988 * Execute the command in cmd, and return the output of that command
989 * in a string.
990 *
991 * Results:
992 * A string containing the output of the command, or the empty string
993 * If error is not NULL, it contains the reason for the command failure
994 *
995 * Side Effects:
996 * The string must be freed by the caller.
997 */
998char *
999Cmd_Exec(char *cmd, char **error)
1000{
1001 char *args[4]; /* Args for invoking the shell */
1002 int fds[2]; /* Pipe streams */
1003 int cpid; /* Child PID */
1004 int pid; /* PID from wait() */
1005 char *res; /* result */
1006 int status; /* command exit status */
1007 Buffer buf; /* buffer to store the result */
1008 char *cp;
1009 int cc;
1010
1011 *error = NULL;
1012
1013 /*
1014 * Set up arguments for shell
1015 */
1016 args[0] = "sh";
1017 args[1] = "-c";
1018 args[2] = cmd;
1019 args[3] = NULL;
1020
1021 /*
1022 * Open a pipe for fetching its output
1023 */
1024 if (pipe(fds) == -1) {
1025 *error = "Couldn't create pipe for \"%s\"";
1026 goto bad;
1027 }
1028
1029 /*
1030 * Fork
1031 */
1032 switch (cpid = vfork()) {
1033 case 0:
1034 /*
1035 * Close input side of pipe
1036 */
1037 (void) close(fds[0]);
1038
1039 /*
1040 * Duplicate the output stream to the shell's output, then
1041 * shut the extra thing down. Note we don't fetch the error
1042 * stream...why not? Why?
1043 */
1044 (void) dup2(fds[1], 1);
1045 (void) close(fds[1]);
1046
1047#if defined(DEFSHELL) && DEFSHELL == 0
1048 (void) execv("/bin/csh", args);
1049#elif DEFSHELL == 1
1050 (void) execv("/bin/sh", args);
1051#elif DEFSHELL == 2
1052 (void) execv("/bin/ksh", args);
1053#else
1054#error "DEFSHELL must be 1 or 2."
1055#endif
1056 _exit(1);
1057 /*NOTREACHED*/
1058
1059 case -1:
1060 *error = "Couldn't exec \"%s\"";
1061 goto bad;
1062
1063 default:
1064 /*
1065 * No need for the writing half
1066 */
1067 (void) close(fds[1]);
1068
1069 buf = Buf_Init (MAKE_BSIZE);
1070
1071 do {
1072 char result[BUFSIZ];
1073 cc = read(fds[0], result, sizeof(result));
1074 if (cc > 0)
1075 Buf_AddBytes(buf, cc, (Byte *) result);
1076 }
1077 while (cc > 0 || (cc == -1 && errno == EINTR));
1078
1079 /*
1080 * Close the input side of the pipe.
1081 */
1082 (void) close(fds[0]);
1083
1084 /*
1085 * Wait for the process to exit.
1086 */
1087 while(((pid = wait(&status)) != cpid) && (pid >= 0))
1088 continue;
1089
1090 if (cc == -1)
1091 *error = "Error reading shell's output for \"%s\"";
1092
1093 res = (char *)Buf_GetAll (buf, &cc);
1094 Buf_Destroy (buf, FALSE);
1095
1096 if (status)
1097 *error = "\"%s\" returned non-zero status";
1098
1099 /*
1100 * Null-terminate the result, convert newlines to spaces and
1101 * install it in the variable.
1102 */
1103 res[cc] = '\0';
1104 cp = &res[cc] - 1;
1105
1106 if (*cp == '\n') {
1107 /*
1108 * A final newline is just stripped
1109 */
1110 *cp-- = '\0';
1111 }
1112 while (cp >= res) {
1113 if (*cp == '\n') {
1114 *cp = ' ';
1115 }
1116 cp--;
1117 }
1118 break;
1119 }
1120 return res;
1121bad:
1122 res = emalloc(1);
1123 *res = '\0';
1124 return res;
1125}
1126
1127/*
1128 * usage --
1129 * exit with usage message
1130 */
1131static void
1132usage(void)
1133{
1134 (void)fprintf(stderr, "%s\n%s\n%s\n",
1135"usage: make [-Beiknqrstv] [-D variable] [-d flags] [-E variable] [-f makefile]",
1136" [-I directory] [-j max_jobs] [-m directory] [-V variable]",
1137" [variable=value] [target ...]");
1138 exit(2);
1139}
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