source: branches/FREEBSD/src/kmk/compat.c@ 24

Last change on this file since 24 was 24, checked in by bird, 23 years ago

Import of RELENG_4_7_0_RELEASE
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1/*
2 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
3 * Copyright (c) 1988, 1989 by Adam de Boor
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
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)compat.c 8.2 (Berkeley) 3/19/94";
42#else
43static const char rcsid[] =
44 "$FreeBSD: src/usr.bin/make/compat.c,v 1.16.2.2 2000/07/01 12:24:21 ps Exp $";
45#endif
46#endif /* not lint */
47
48/*-
49 * compat.c --
50 * The routines in this file implement the full-compatibility
51 * mode of PMake. Most of the special functionality of PMake
52 * is available in this mode. Things not supported:
53 * - different shells.
54 * - friendly variable substitution.
55 *
56 * Interface:
57 * Compat_Run Initialize things for this module and recreate
58 * thems as need creatin'
59 */
60
61#include <stdio.h>
62#include <sys/types.h>
63#include <sys/stat.h>
64#include <sys/wait.h>
65#include <ctype.h>
66#include <errno.h>
67#include <signal.h>
68#include "make.h"
69#include "hash.h"
70#include "dir.h"
71#include "job.h"
72
73/*
74 * The following array is used to make a fast determination of which
75 * characters are interpreted specially by the shell. If a command
76 * contains any of these characters, it is executed by the shell, not
77 * directly by us.
78 */
79
80static char meta[256];
81
82static GNode *curTarg = NILGNODE;
83static GNode *ENDNode;
84static void CompatInterrupt __P((int));
85static int CompatRunCommand __P((ClientData, ClientData));
86static int CompatMake __P((ClientData, ClientData));
87
88static char *sh_builtin[] = {
89 "alias", "cd", "eval", "exec", "exit", "read", "set", "ulimit",
90 "unalias", "umask", "unset", "wait", ":", 0};
91
92/*-
93 *-----------------------------------------------------------------------
94 * CompatInterrupt --
95 * Interrupt the creation of the current target and remove it if
96 * it ain't precious.
97 *
98 * Results:
99 * None.
100 *
101 * Side Effects:
102 * The target is removed and the process exits. If .INTERRUPT exists,
103 * its commands are run first WITH INTERRUPTS IGNORED..
104 *
105 *-----------------------------------------------------------------------
106 */
107static void
108CompatInterrupt (signo)
109 int signo;
110{
111 GNode *gn;
112
113 if ((curTarg != NILGNODE) && !Targ_Precious (curTarg)) {
114 char *p1;
115 char *file = Var_Value (TARGET, curTarg, &p1);
116
117 if (!noExecute && eunlink(file) != -1) {
118 printf ("*** %s removed\n", file);
119 }
120 efree(p1);
121
122 /*
123 * Run .INTERRUPT only if hit with interrupt signal
124 */
125 if (signo == SIGINT) {
126 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
127 if (gn != NILGNODE) {
128 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
129 }
130 }
131
132 }
133 if (signo == SIGQUIT)
134 exit(signo);
135 (void) signal(signo, SIG_DFL);
136 (void) kill(getpid(), signo);
137}
138
139
140/*-
141 *-----------------------------------------------------------------------
142 * shellneed --
143 *
144 * Results:
145 * Returns 1 if a specified line must be executed by the shell,
146 * 0 if it can be run via execve, and -1 if the command is a no-op.
147 *
148 * Side Effects:
149 * None.
150 *
151 *-----------------------------------------------------------------------
152 */
153static int
154shellneed (cmd)
155 char *cmd;
156{
157 char **av, **p;
158 int ac;
159
160 av = brk_string(cmd, &ac, TRUE);
161 for(p = sh_builtin; *p != 0; p++)
162 if (strcmp(av[1], *p) == 0)
163 return (1);
164 return (0);
165}
166
167
168/*-
169 *-----------------------------------------------------------------------
170 * CompatRunCommand --
171 * Execute the next command for a target. If the command returns an
172 * error, the node's made field is set to ERROR and creation stops.
173 *
174 * Results:
175 * 0 if the command succeeded, 1 if an error occurred.
176 *
177 * Side Effects:
178 * The node's 'made' field may be set to ERROR.
179 *
180 *-----------------------------------------------------------------------
181 */
182static int
183CompatRunCommand (cmdp, gnp)
184 ClientData cmdp; /* Command to execute */
185 ClientData gnp; /* Node from which the command came */
186{
187 char *cmdStart; /* Start of expanded command */
188 register char *cp;
189 Boolean silent, /* Don't print command */
190 errCheck; /* Check errors */
191 int reason; /* Reason for child's death */
192 int status; /* Description of child's death */
193 int cpid; /* Child actually found */
194 ReturnStatus stat; /* Status of fork */
195 LstNode cmdNode; /* Node where current command is located */
196 char **av; /* Argument vector for thing to exec */
197 int argc; /* Number of arguments in av or 0 if not
198 * dynamically allocated */
199 Boolean local; /* TRUE if command should be executed
200 * locally */
201 int internal; /* Various values.. */
202 char *cmd = (char *) cmdp;
203 GNode *gn = (GNode *) gnp;
204
205 /*
206 * Avoid clobbered variable warnings by forcing the compiler
207 * to ``unregister'' variables
208 */
209#if __GNUC__
210 (void) &av;
211 (void) &errCheck;
212#endif
213 silent = gn->type & OP_SILENT;
214 errCheck = !(gn->type & OP_IGNORE);
215
216 cmdNode = Lst_Member (gn->commands, (ClientData)cmd);
217 cmdStart = Var_Subst (NULL, cmd, gn, FALSE);
218
219 /*
220 * brk_string will return an argv with a NULL in av[0], thus causing
221 * execvp to choke and die horribly. Besides, how can we execute a null
222 * command? In any case, we warn the user that the command expanded to
223 * nothing (is this the right thing to do?).
224 */
225
226 if (*cmdStart == '\0') {
227 free(cmdStart);
228 Error("%s expands to empty string", cmd);
229 return(0);
230 } else {
231 cmd = cmdStart;
232 }
233 Lst_Replace (cmdNode, (ClientData)cmdStart);
234
235 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
236 (void)Lst_AtEnd(ENDNode->commands, (ClientData)cmdStart);
237 return(0);
238 } else if (strcmp(cmdStart, "...") == 0) {
239 gn->type |= OP_SAVE_CMDS;
240 return(0);
241 }
242
243 while ((*cmd == '@') || (*cmd == '-')) {
244 if (*cmd == '@') {
245 silent = DEBUG(LOUD) ? FALSE : TRUE;
246 } else {
247 errCheck = FALSE;
248 }
249 cmd++;
250 }
251
252 while (isspace((unsigned char)*cmd))
253 cmd++;
254
255 /*
256 * Search for meta characters in the command. If there are no meta
257 * characters, there's no need to execute a shell to execute the
258 * command.
259 */
260 for (cp = cmd; !meta[(unsigned char)*cp]; cp++) {
261 continue;
262 }
263
264 /*
265 * Print the command before echoing if we're not supposed to be quiet for
266 * this one. We also print the command if -n given.
267 */
268 if (!silent || noExecute) {
269 printf ("%s\n", cmd);
270 fflush(stdout);
271 }
272
273 /*
274 * If we're not supposed to execute any commands, this is as far as
275 * we go...
276 */
277 if (noExecute) {
278 return (0);
279 }
280
281 if (*cp != '\0') {
282 /*
283 * If *cp isn't the null character, we hit a "meta" character and
284 * need to pass the command off to the shell. We give the shell the
285 * -e flag as well as -c if it's supposed to exit when it hits an
286 * error.
287 */
288 static char *shargv[4] = { "/bin/sh" };
289
290 shargv[1] = (errCheck ? "-ec" : "-c");
291 shargv[2] = cmd;
292 shargv[3] = (char *)NULL;
293 av = shargv;
294 argc = 0;
295 } else if ((internal = shellneed(cmd))) {
296 /*
297 * This command must be passed by the shell for other reasons..
298 * or.. possibly not at all.
299 */
300 static char *shargv[4] = { "/bin/sh" };
301
302 if (internal == -1) {
303 /* Command does not need to be executed */
304 return (0);
305 }
306
307 shargv[1] = (errCheck ? "-ec" : "-c");
308 shargv[2] = cmd;
309 shargv[3] = (char *)NULL;
310 av = shargv;
311 argc = 0;
312 } else {
313 /*
314 * No meta-characters, so no need to exec a shell. Break the command
315 * into words to form an argument vector we can execute.
316 * brk_string sticks our name in av[0], so we have to
317 * skip over it...
318 */
319 av = brk_string(cmd, &argc, TRUE);
320 av += 1;
321 }
322
323 local = TRUE;
324
325 /*
326 * Fork and execute the single command. If the fork fails, we abort.
327 */
328 cpid = vfork();
329 if (cpid < 0) {
330 Fatal("Could not fork");
331 }
332 if (cpid == 0) {
333 if (local) {
334 execvp(av[0], av);
335 (void) write (2, av[0], strlen (av[0]));
336 (void) write (2, ":", 1);
337 (void) write (2, strerror(errno), strlen(strerror(errno)));
338 (void) write (2, "\n", 1);
339 } else {
340 (void)execv(av[0], av);
341 }
342 exit(1);
343 }
344
345 /*
346 * we need to print out the command associated with this Gnode in
347 * Targ_PrintCmd from Targ_PrintGraph when debugging at level g2,
348 * in main(), Fatal() and DieHorribly(), therefore do not free it
349 * when debugging.
350 */
351 if (!DEBUG(GRAPH2)) {
352 free(cmdStart);
353 Lst_Replace (cmdNode, cmdp);
354 }
355
356 /*
357 * The child is off and running. Now all we can do is wait...
358 */
359 while (1) {
360
361 while ((stat = wait(&reason)) != cpid) {
362 if (stat == -1 && errno != EINTR) {
363 break;
364 }
365 }
366
367 if (stat > -1) {
368 if (WIFSTOPPED(reason)) {
369 status = WSTOPSIG(reason); /* stopped */
370 } else if (WIFEXITED(reason)) {
371 status = WEXITSTATUS(reason); /* exited */
372 if (status != 0) {
373 printf ("*** Error code %d", status);
374 }
375 } else {
376 status = WTERMSIG(reason); /* signaled */
377 printf ("*** Signal %d", status);
378 }
379
380
381 if (!WIFEXITED(reason) || (status != 0)) {
382 if (errCheck) {
383 gn->made = ERROR;
384 if (keepgoing) {
385 /*
386 * Abort the current target, but let others
387 * continue.
388 */
389 printf (" (continuing)\n");
390 }
391 } else {
392 /*
393 * Continue executing commands for this target.
394 * If we return 0, this will happen...
395 */
396 printf (" (ignored)\n");
397 status = 0;
398 }
399 }
400 break;
401 } else {
402 Fatal ("error in wait: %d", stat);
403 /*NOTREACHED*/
404 }
405 }
406
407 return (status);
408}
409
410
411/*-
412 *-----------------------------------------------------------------------
413 * CompatMake --
414 * Make a target.
415 *
416 * Results:
417 * 0
418 *
419 * Side Effects:
420 * If an error is detected and not being ignored, the process exits.
421 *
422 *-----------------------------------------------------------------------
423 */
424static int
425CompatMake (gnp, pgnp)
426 ClientData gnp; /* The node to make */
427 ClientData pgnp; /* Parent to abort if necessary */
428{
429 GNode *gn = (GNode *) gnp;
430 GNode *pgn = (GNode *) pgnp;
431 if (gn->type & OP_USE) {
432 Make_HandleUse(gn, pgn);
433 } else if (gn->made == UNMADE) {
434 /*
435 * First mark ourselves to be made, then apply whatever transformations
436 * the suffix module thinks are necessary. Once that's done, we can
437 * descend and make all our children. If any of them has an error
438 * but the -k flag was given, our 'make' field will be set FALSE again.
439 * This is our signal to not attempt to do anything but abort our
440 * parent as well.
441 */
442 gn->make = TRUE;
443 gn->made = BEINGMADE;
444 Suff_FindDeps (gn);
445 Lst_ForEach (gn->children, CompatMake, (ClientData)gn);
446 if (!gn->make) {
447 gn->made = ABORTED;
448 pgn->make = FALSE;
449 return (0);
450 }
451
452 if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
453 char *p1;
454 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
455 efree(p1);
456 }
457
458 /*
459 * All the children were made ok. Now cmtime contains the modification
460 * time of the newest child, we need to find out if we exist and when
461 * we were modified last. The criteria for datedness are defined by the
462 * Make_OODate function.
463 */
464 if (DEBUG(MAKE)) {
465 printf("Examining %s...", gn->name);
466 }
467 if (! Make_OODate(gn)) {
468 gn->made = UPTODATE;
469 if (DEBUG(MAKE)) {
470 printf("up-to-date.\n");
471 }
472 return (0);
473 } else if (DEBUG(MAKE)) {
474 printf("out-of-date.\n");
475 }
476
477 /*
478 * If the user is just seeing if something is out-of-date, exit now
479 * to tell him/her "yes".
480 */
481 if (queryFlag) {
482 exit (-1);
483 }
484
485 /*
486 * We need to be re-made. We also have to make sure we've got a $?
487 * variable. To be nice, we also define the $> variable using
488 * Make_DoAllVar().
489 */
490 Make_DoAllVar(gn);
491
492 /*
493 * Alter our type to tell if errors should be ignored or things
494 * should not be printed so CompatRunCommand knows what to do.
495 */
496 if (Targ_Ignore (gn)) {
497 gn->type |= OP_IGNORE;
498 }
499 if (Targ_Silent (gn)) {
500 gn->type |= OP_SILENT;
501 }
502
503 if (Job_CheckCommands (gn, Fatal)) {
504 /*
505 * Our commands are ok, but we still have to worry about the -t
506 * flag...
507 */
508 if (!touchFlag) {
509 curTarg = gn;
510 Lst_ForEach (gn->commands, CompatRunCommand, (ClientData)gn);
511 curTarg = NILGNODE;
512 } else {
513 Job_Touch (gn, gn->type & OP_SILENT);
514 }
515 } else {
516 gn->made = ERROR;
517 }
518
519 if (gn->made != ERROR) {
520 /*
521 * If the node was made successfully, mark it so, update
522 * its modification time and timestamp all its parents. Note
523 * that for .ZEROTIME targets, the timestamping isn't done.
524 * This is to keep its state from affecting that of its parent.
525 */
526 gn->made = MADE;
527#ifndef RECHECK
528 /*
529 * We can't re-stat the thing, but we can at least take care of
530 * rules where a target depends on a source that actually creates
531 * the target, but only if it has changed, e.g.
532 *
533 * parse.h : parse.o
534 *
535 * parse.o : parse.y
536 * yacc -d parse.y
537 * cc -c y.tab.c
538 * mv y.tab.o parse.o
539 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
540 *
541 * In this case, if the definitions produced by yacc haven't
542 * changed from before, parse.h won't have been updated and
543 * gn->mtime will reflect the current modification time for
544 * parse.h. This is something of a kludge, I admit, but it's a
545 * useful one..
546 *
547 * XXX: People like to use a rule like
548 *
549 * FRC:
550 *
551 * To force things that depend on FRC to be made, so we have to
552 * check for gn->children being empty as well...
553 */
554 if (!Lst_IsEmpty(gn->commands) || Lst_IsEmpty(gn->children)) {
555 gn->mtime = now;
556 }
557#else
558 /*
559 * This is what Make does and it's actually a good thing, as it
560 * allows rules like
561 *
562 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
563 *
564 * to function as intended. Unfortunately, thanks to the stateless
565 * nature of NFS (and the speed of this program), there are times
566 * when the modification time of a file created on a remote
567 * machine will not be modified before the stat() implied by
568 * the Dir_MTime occurs, thus leading us to believe that the file
569 * is unchanged, wreaking havoc with files that depend on this one.
570 *
571 * I have decided it is better to make too much than to make too
572 * little, so this stuff is commented out unless you're sure it's
573 * ok.
574 * -- ardeb 1/12/88
575 */
576 if (noExecute || Dir_MTime(gn) == 0) {
577 gn->mtime = now;
578 }
579 if (gn->cmtime > gn->mtime)
580 gn->mtime = gn->cmtime;
581 if (DEBUG(MAKE)) {
582 printf("update time: %s\n", Targ_FmtTime(gn->mtime));
583 }
584#endif
585 if (!(gn->type & OP_EXEC)) {
586 pgn->childMade = TRUE;
587 Make_TimeStamp(pgn, gn);
588 }
589 } else if (keepgoing) {
590 pgn->make = FALSE;
591 } else {
592 char *p1;
593
594 printf ("\n\nStop in %s.\n", Var_Value(".CURDIR", gn, &p1));
595 efree(p1);
596 exit (1);
597 }
598 } else if (gn->made == ERROR) {
599 /*
600 * Already had an error when making this beastie. Tell the parent
601 * to abort.
602 */
603 pgn->make = FALSE;
604 } else {
605 if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
606 char *p1;
607 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
608 efree(p1);
609 }
610 switch(gn->made) {
611 case BEINGMADE:
612 Error("Graph cycles through %s\n", gn->name);
613 gn->made = ERROR;
614 pgn->make = FALSE;
615 break;
616 case MADE:
617 if ((gn->type & OP_EXEC) == 0) {
618 pgn->childMade = TRUE;
619 Make_TimeStamp(pgn, gn);
620 }
621 break;
622 case UPTODATE:
623 if ((gn->type & OP_EXEC) == 0) {
624 Make_TimeStamp(pgn, gn);
625 }
626 break;
627 default:
628 break;
629 }
630 }
631
632 return (0);
633}
634
635
636/*-
637 *-----------------------------------------------------------------------
638 * Compat_Run --
639 * Initialize this mode and start making.
640 *
641 * Results:
642 * None.
643 *
644 * Side Effects:
645 * Guess what?
646 *
647 *-----------------------------------------------------------------------
648 */
649void
650Compat_Run(targs)
651 Lst targs; /* List of target nodes to re-create */
652{
653 char *cp; /* Pointer to string of shell meta-characters */
654 GNode *gn = NULL;/* Current root target */
655 int errors; /* Number of targets not remade due to errors */
656
657 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
658 signal(SIGINT, CompatInterrupt);
659 }
660 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
661 signal(SIGTERM, CompatInterrupt);
662 }
663 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
664 signal(SIGHUP, CompatInterrupt);
665 }
666 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
667 signal(SIGQUIT, CompatInterrupt);
668 }
669
670 for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
671 meta[(unsigned char) *cp] = 1;
672 }
673 /*
674 * The null character serves as a sentinel in the string.
675 */
676 meta[0] = 1;
677
678 ENDNode = Targ_FindNode(".END", TARG_CREATE);
679 /*
680 * If the user has defined a .BEGIN target, execute the commands attached
681 * to it.
682 */
683 if (!queryFlag) {
684 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
685 if (gn != NILGNODE) {
686 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
687 if (gn->made == ERROR) {
688 printf("\n\nStop.\n");
689 exit(1);
690 }
691 }
692 }
693
694 /*
695 * For each entry in the list of targets to create, call CompatMake on
696 * it to create the thing. CompatMake will leave the 'made' field of gn
697 * in one of several states:
698 * UPTODATE gn was already up-to-date
699 * MADE gn was recreated successfully
700 * ERROR An error occurred while gn was being created
701 * ABORTED gn was not remade because one of its inferiors
702 * could not be made due to errors.
703 */
704 errors = 0;
705 while (!Lst_IsEmpty (targs)) {
706 gn = (GNode *) Lst_DeQueue (targs);
707 CompatMake (gn, gn);
708
709 if (gn->made == UPTODATE) {
710 printf ("`%s' is up to date.\n", gn->name);
711 } else if (gn->made == ABORTED) {
712 printf ("`%s' not remade because of errors.\n", gn->name);
713 errors += 1;
714 }
715 }
716
717 /*
718 * If the user has defined a .END target, run its commands.
719 */
720 if (errors == 0) {
721 Lst_ForEach(ENDNode->commands, CompatRunCommand, (ClientData)gn);
722 }
723}
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