source: trunk/src/kmk/compat.c@ 119

Last change on this file since 119 was 51, checked in by bird, 23 years ago

kMk and porting to kLib.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 23.1 KB
Line 
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#define KLIBFILEDEF rcsid
47#endif /* not lint */
48
49/*-
50 * compat.c --
51 * The routines in this file implement the full-compatibility
52 * mode of PMake. Most of the special functionality of PMake
53 * is available in this mode. Things not supported:
54 * - different shells.
55 * - friendly variable substitution.
56 *
57 * Interface:
58 * Compat_Run Initialize things for this module and recreate
59 * thems as need creatin'
60 */
61
62#include <stdio.h>
63#include <sys/types.h>
64#include <sys/stat.h>
65#ifdef __IBMC__
66#else
67#include <sys/wait.h>
68#endif
69#if defined(__EMX__)
70#include <sys/process.h>
71#endif
72#if defined(OS2) && defined(__IBMC__)
73#include <process.h>
74#endif
75#include <ctype.h>
76#include <errno.h>
77#include <signal.h>
78#include "make.h"
79#include "hash.h"
80#include "dir.h"
81#include "job.h"
82
83/*
84 * The following array is used to make a fast determination of which
85 * characters are interpreted specially by the shell. If a command
86 * contains any of these characters, it is executed by the shell, not
87 * directly by us.
88 */
89
90static char meta[256];
91
92static GNode *curTarg = NILGNODE;
93static GNode *ENDNode;
94static void CompatInterrupt __P((int));
95static int CompatRunCommand __P((ClientData, ClientData));
96static int CompatMake __P((ClientData, ClientData));
97
98static char *sh_builtin[] = {
99 "alias", "cd", "eval", "exec", "exit", "read", "set", "ulimit",
100 "unalias", "umask", "unset", "wait", ":", 0};
101
102/*-
103 *-----------------------------------------------------------------------
104 * CompatInterrupt --
105 * Interrupt the creation of the current target and remove it if
106 * it ain't precious.
107 *
108 * Results:
109 * None.
110 *
111 * Side Effects:
112 * The target is removed and the process exits. If .INTERRUPT exists,
113 * its commands are run first WITH INTERRUPTS IGNORED..
114 *
115 *-----------------------------------------------------------------------
116 */
117static void
118CompatInterrupt (signo)
119 int signo;
120{
121 GNode *gn;
122
123 if ((curTarg != NILGNODE) && !Targ_Precious (curTarg)) {
124 char *p1;
125 char *file = Var_Value (TARGET, curTarg, &p1);
126
127 if (!noExecute && eunlink(file) != -1) {
128 printf ("*** %s removed\n", file);
129 }
130 efree(p1);
131
132 /*
133 * Run .INTERRUPT only if hit with interrupt signal
134 */
135 if (signo == SIGINT) {
136 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
137 if (gn != NILGNODE) {
138 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
139 }
140 }
141
142 }
143 #if !(defined(OS2) && defined(__IBMC__))
144 if (signo == SIGQUIT)
145 exit(signo);
146 #endif
147 (void) signal(signo, SIG_DFL);
148 (void) kill(getpid(), signo);
149}
150
151
152/*-
153 *-----------------------------------------------------------------------
154 * shellneed --
155 *
156 * Results:
157 * Returns 1 if a specified line must be executed by the shell,
158 * 0 if it can be run via execve, and -1 if the command is a no-op.
159 *
160 * Side Effects:
161 * None.
162 *
163 *-----------------------------------------------------------------------
164 */
165static int
166shellneed (cmd)
167 char *cmd;
168{
169 char **av, **p;
170 int ac;
171
172 av = brk_string(cmd, &ac, TRUE);
173 for(p = sh_builtin; *p != 0; p++)
174 if (strcmp(av[1], *p) == 0)
175 return (1);
176 return (0);
177}
178
179
180/*-
181 *-----------------------------------------------------------------------
182 * CompatRunCommand --
183 * Execute the next command for a target. If the command returns an
184 * error, the node's made field is set to ERROR and creation stops.
185 *
186 * Results:
187 * 0 if the command succeeded, 1 if an error occurred.
188 *
189 * Side Effects:
190 * The node's 'made' field may be set to ERROR.
191 *
192 *-----------------------------------------------------------------------
193 */
194static int
195CompatRunCommand (cmdp, gnp)
196 ClientData cmdp; /* Command to execute */
197 ClientData gnp; /* Node from which the command came */
198{
199 char *cmdStart; /* Start of expanded command */
200 register char *cp;
201 Boolean silent, /* Don't print command */
202 errCheck; /* Check errors */
203 int reason; /* Reason for child's death */
204 int status; /* Description of child's death */
205 int cpid; /* Child actually found */
206 ReturnStatus stat; /* Status of fork */
207 LstNode cmdNode; /* Node where current command is located */
208 char **av; /* Argument vector for thing to exec */
209 int argc; /* Number of arguments in av or 0 if not
210 * dynamically allocated */
211 Boolean local; /* TRUE if command should be executed
212 * locally */
213 int internal; /* Various values.. */
214 char *cmd = (char *) cmdp;
215 GNode *gn = (GNode *) gnp;
216
217 /*
218 * Avoid clobbered variable warnings by forcing the compiler
219 * to ``unregister'' variables
220 */
221#if __GNUC__
222 (void) &av;
223 (void) &errCheck;
224#endif
225 silent = gn->type & OP_SILENT;
226 errCheck = !(gn->type & OP_IGNORE);
227
228 cmdNode = Lst_Member (gn->commands, (ClientData)cmd);
229 cmdStart = Var_Subst (NULL, cmd, gn, FALSE);
230
231 /*
232 * brk_string will return an argv with a NULL in av[0], thus causing
233 * execvp to choke and die horribly. Besides, how can we execute a null
234 * command? In any case, we warn the user that the command expanded to
235 * nothing (is this the right thing to do?).
236 */
237
238 if (*cmdStart == '\0') {
239 efree(cmdStart);
240 Error("%s expands to empty string", cmd);
241 return(0);
242 } else {
243 cmd = cmdStart;
244 }
245 Lst_Replace (cmdNode, (ClientData)cmdStart);
246
247 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
248 (void)Lst_AtEnd(ENDNode->commands, (ClientData)cmdStart);
249 return(0);
250 } else if (strcmp(cmdStart, "...") == 0) {
251 gn->type |= OP_SAVE_CMDS;
252 return(0);
253 }
254
255 while ((*cmd == '@') || (*cmd == '-')) {
256 if (*cmd == '@') {
257 silent = DEBUG(LOUD) ? FALSE : TRUE;
258 } else {
259 errCheck = FALSE;
260 }
261 cmd++;
262 }
263
264 while (isspace((unsigned char)*cmd))
265 cmd++;
266
267 /*
268 * Search for meta characters in the command. If there are no meta
269 * characters, there's no need to execute a shell to execute the
270 * command.
271 */
272 for (cp = cmd; !meta[(unsigned char)*cp]; cp++) {
273 continue;
274 }
275
276 /*
277 * Print the command before echoing if we're not supposed to be quiet for
278 * this one. We also print the command if -n given.
279 */
280 if (!silent || noExecute) {
281 printf ("%s\n", cmd);
282 fflush(stdout);
283 }
284
285 /*
286 * If we're not supposed to execute any commands, this is as far as
287 * we go...
288 */
289 if (noExecute) {
290 return (0);
291 }
292
293 if (*cp != '\0') {
294 /*
295 * If *cp isn't the null character, we hit a "meta" character and
296 * need to pass the command off to the shell. We give the shell the
297 * -e flag as well as -c if it's supposed to exit when it hits an
298 * error.
299 */
300 static char *shargv[4] = { "/bin/sh" };
301
302 shargv[1] = (errCheck ? "-ec" : "-c");
303 shargv[2] = cmd;
304 shargv[3] = (char *)NULL;
305 av = shargv;
306 argc = 0;
307 } else if ((internal = shellneed(cmd))) {
308 /*
309 * This command must be passed by the shell for other reasons..
310 * or.. possibly not at all.
311 */
312 static char *shargv[4] = { "/bin/sh" };
313
314 if (internal == -1) {
315 /* Command does not need to be executed */
316 return (0);
317 }
318
319 shargv[1] = (errCheck ? "-ec" : "-c");
320 shargv[2] = cmd;
321 shargv[3] = (char *)NULL;
322 av = shargv;
323 argc = 0;
324 } else {
325 /*
326 * No meta-characters, so no need to exec a shell. Break the command
327 * into words to form an argument vector we can execute.
328 * brk_string sticks our name in av[0], so we have to
329 * skip over it...
330 */
331 av = brk_string(cmd, &argc, TRUE);
332 av += 1;
333 }
334
335 local = TRUE;
336
337 /*
338 * Fork and execute the single command. If the fork fails, we abort.
339 */
340#ifdef OS2 //@todo use klib later!
341 cpid = _spawnvp(P_NOWAIT, av[0], av);
342#else
343 cpid = vfork();
344 if (cpid < 0) {
345 Fatal("Could not fork");
346 }
347 if (cpid == 0) {
348 if (local) {
349 execvp(av[0], av);
350 (void) write (2, av[0], strlen (av[0]));
351 (void) write (2, ":", 1);
352 (void) write (2, strerror(errno), strlen(strerror(errno)));
353 (void) write (2, "\n", 1);
354 } else {
355 (void)execv(av[0], av);
356 }
357 exit(1);
358 }
359#endif
360
361 /*
362 * we need to print out the command associated with this Gnode in
363 * Targ_PrintCmd from Targ_PrintGraph when debugging at level g2,
364 * in main(), Fatal() and DieHorribly(), therefore do not efree it
365 * when debugging.
366 */
367 if (!DEBUG(GRAPH2)) {
368 efree(cmdStart);
369 Lst_Replace (cmdNode, cmdp);
370 }
371
372 /*
373 * The child is off and running. Now all we can do is wait...
374 */
375 while (1) {
376
377 while ((stat = wait(&reason)) != cpid) {
378 if (stat == -1 && errno != EINTR) {
379 break;
380 }
381 }
382
383 if (stat > -1) {
384 if (WIFSTOPPED(reason)) {
385 status = WSTOPSIG(reason); /* stopped */
386 } else if (WIFEXITED(reason)) {
387 status = WEXITSTATUS(reason); /* exited */
388 if (status != 0) {
389 printf ("*** Error code %d", status);
390 }
391 } else {
392 status = WTERMSIG(reason); /* signaled */
393 printf ("*** Signal %d", status);
394 }
395
396
397 if (!WIFEXITED(reason) || (status != 0)) {
398 if (errCheck) {
399 gn->made = ERROR;
400 if (keepgoing) {
401 /*
402 * Abort the current target, but let others
403 * continue.
404 */
405 printf (" (continuing)\n");
406 }
407 } else {
408 /*
409 * Continue executing commands for this target.
410 * If we return 0, this will happen...
411 */
412 printf (" (ignored)\n");
413 status = 0;
414 }
415 }
416 break;
417 } else {
418 Fatal ("error in wait: %d", stat);
419 /*NOTREACHED*/
420 }
421 }
422
423 return (status);
424}
425
426
427/*-
428 *-----------------------------------------------------------------------
429 * CompatMake --
430 * Make a target.
431 *
432 * Results:
433 * 0
434 *
435 * Side Effects:
436 * If an error is detected and not being ignored, the process exits.
437 *
438 *-----------------------------------------------------------------------
439 */
440static int
441CompatMake (gnp, pgnp)
442 ClientData gnp; /* The node to make */
443 ClientData pgnp; /* Parent to abort if necessary */
444{
445 GNode *gn = (GNode *) gnp;
446 GNode *pgn = (GNode *) pgnp;
447 if (gn->type & OP_USE) {
448 Make_HandleUse(gn, pgn);
449 } else if (gn->made == UNMADE) {
450 /*
451 * First mark ourselves to be made, then apply whatever transformations
452 * the suffix module thinks are necessary. Once that's done, we can
453 * descend and make all our children. If any of them has an error
454 * but the -k flag was given, our 'make' field will be set FALSE again.
455 * This is our signal to not attempt to do anything but abort our
456 * parent as well.
457 */
458 gn->make = TRUE;
459 gn->made = BEINGMADE;
460 Suff_FindDeps (gn);
461 Lst_ForEach (gn->children, CompatMake, (ClientData)gn);
462 if (!gn->make) {
463 gn->made = ABORTED;
464 pgn->make = FALSE;
465 return (0);
466 }
467
468 if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
469 char *p1;
470 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
471 efree(p1);
472 }
473
474 /*
475 * All the children were made ok. Now cmtime contains the modification
476 * time of the newest child, we need to find out if we exist and when
477 * we were modified last. The criteria for datedness are defined by the
478 * Make_OODate function.
479 */
480 if (DEBUG(MAKE)) {
481 printf("Examining %s...", gn->name);
482 }
483 if (! Make_OODate(gn)) {
484 gn->made = UPTODATE;
485 if (DEBUG(MAKE)) {
486 printf("up-to-date.\n");
487 }
488 return (0);
489 } else if (DEBUG(MAKE)) {
490 printf("out-of-date.\n");
491 }
492
493 /*
494 * If the user is just seeing if something is out-of-date, exit now
495 * to tell him/her "yes".
496 */
497 if (queryFlag) {
498 exit (-1);
499 }
500
501 /*
502 * We need to be re-made. We also have to make sure we've got a $?
503 * variable. To be nice, we also define the $> variable using
504 * Make_DoAllVar().
505 */
506 Make_DoAllVar(gn);
507
508 /*
509 * Alter our type to tell if errors should be ignored or things
510 * should not be printed so CompatRunCommand knows what to do.
511 */
512 if (Targ_Ignore (gn)) {
513 gn->type |= OP_IGNORE;
514 }
515 if (Targ_Silent (gn)) {
516 gn->type |= OP_SILENT;
517 }
518
519 if (Job_CheckCommands (gn, Fatal)) {
520 /*
521 * Our commands are ok, but we still have to worry about the -t
522 * flag...
523 */
524 if (!touchFlag) {
525 curTarg = gn;
526 Lst_ForEach (gn->commands, CompatRunCommand, (ClientData)gn);
527 curTarg = NILGNODE;
528 } else {
529 Job_Touch (gn, gn->type & OP_SILENT);
530 }
531 } else {
532 gn->made = ERROR;
533 }
534
535 if (gn->made != ERROR) {
536 /*
537 * If the node was made successfully, mark it so, update
538 * its modification time and timestamp all its parents. Note
539 * that for .ZEROTIME targets, the timestamping isn't done.
540 * This is to keep its state from affecting that of its parent.
541 */
542 gn->made = MADE;
543#ifndef RECHECK
544 /*
545 * We can't re-stat the thing, but we can at least take care of
546 * rules where a target depends on a source that actually creates
547 * the target, but only if it has changed, e.g.
548 *
549 * parse.h : parse.o
550 *
551 * parse.o : parse.y
552 * yacc -d parse.y
553 * cc -c y.tab.c
554 * mv y.tab.o parse.o
555 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
556 *
557 * In this case, if the definitions produced by yacc haven't
558 * changed from before, parse.h won't have been updated and
559 * gn->mtime will reflect the current modification time for
560 * parse.h. This is something of a kludge, I admit, but it's a
561 * useful one..
562 *
563 * XXX: People like to use a rule like
564 *
565 * FRC:
566 *
567 * To force things that depend on FRC to be made, so we have to
568 * check for gn->children being empty as well...
569 */
570 if (!Lst_IsEmpty(gn->commands) || Lst_IsEmpty(gn->children)) {
571 gn->mtime = now;
572 }
573#else
574 /*
575 * This is what Make does and it's actually a good thing, as it
576 * allows rules like
577 *
578 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
579 *
580 * to function as intended. Unfortunately, thanks to the stateless
581 * nature of NFS (and the speed of this program), there are times
582 * when the modification time of a file created on a remote
583 * machine will not be modified before the stat() implied by
584 * the Dir_MTime occurs, thus leading us to believe that the file
585 * is unchanged, wreaking havoc with files that depend on this one.
586 *
587 * I have decided it is better to make too much than to make too
588 * little, so this stuff is commented out unless you're sure it's
589 * ok.
590 * -- ardeb 1/12/88
591 */
592 if (noExecute || Dir_MTime(gn) == 0) {
593 gn->mtime = now;
594 }
595 if (gn->cmtime > gn->mtime)
596 gn->mtime = gn->cmtime;
597 if (DEBUG(MAKE)) {
598 printf("update time: %s\n", Targ_FmtTime(gn->mtime));
599 }
600#endif
601 if (!(gn->type & OP_EXEC)) {
602 pgn->childMade = TRUE;
603 Make_TimeStamp(pgn, gn);
604 }
605 } else if (keepgoing) {
606 pgn->make = FALSE;
607 } else {
608 char *p1;
609
610 printf ("\n\nStop in %s.\n", Var_Value(".CURDIR", gn, &p1));
611 efree(p1);
612 exit (1);
613 }
614 } else if (gn->made == ERROR) {
615 /*
616 * Already had an error when making this beastie. Tell the parent
617 * to abort.
618 */
619 pgn->make = FALSE;
620 } else {
621 if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
622 char *p1;
623 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
624 efree(p1);
625 }
626 switch(gn->made) {
627 case BEINGMADE:
628 Error("Graph cycles through %s\n", gn->name);
629 gn->made = ERROR;
630 pgn->make = FALSE;
631 break;
632 case MADE:
633 if ((gn->type & OP_EXEC) == 0) {
634 pgn->childMade = TRUE;
635 Make_TimeStamp(pgn, gn);
636 }
637 break;
638 case UPTODATE:
639 if ((gn->type & OP_EXEC) == 0) {
640 Make_TimeStamp(pgn, gn);
641 }
642 break;
643 default:
644 break;
645 }
646 }
647
648 return (0);
649}
650
651
652/*-
653 *-----------------------------------------------------------------------
654 * Compat_Run --
655 * Initialize this mode and start making.
656 *
657 * Results:
658 * None.
659 *
660 * Side Effects:
661 * Guess what?
662 *
663 *-----------------------------------------------------------------------
664 */
665void
666Compat_Run(targs)
667 Lst targs; /* List of target nodes to re-create */
668{
669 char *cp; /* Pointer to string of shell meta-characters */
670 GNode *gn = NULL;/* Current root target */
671 int errors; /* Number of targets not remade due to errors */
672
673 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
674 signal(SIGINT, CompatInterrupt);
675 }
676 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
677 signal(SIGTERM, CompatInterrupt);
678 }
679 #if !(defined(OS2) && defined(__IBMC__))
680 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
681 signal(SIGHUP, CompatInterrupt);
682 }
683 #endif
684 #if !(defined(OS2) && defined(__IBMC__))
685 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
686 signal(SIGQUIT, CompatInterrupt);
687 }
688 #endif
689
690 for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
691 meta[(unsigned char) *cp] = 1;
692 }
693 /*
694 * The null character serves as a sentinel in the string.
695 */
696 meta[0] = 1;
697
698 ENDNode = Targ_FindNode(".END", TARG_CREATE);
699 /*
700 * If the user has defined a .BEGIN target, execute the commands attached
701 * to it.
702 */
703 if (!queryFlag) {
704 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
705 if (gn != NILGNODE) {
706 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
707 if (gn->made == ERROR) {
708 printf("\n\nStop.\n");
709 exit(1);
710 }
711 }
712 }
713
714 /*
715 * For each entry in the list of targets to create, call CompatMake on
716 * it to create the thing. CompatMake will leave the 'made' field of gn
717 * in one of several states:
718 * UPTODATE gn was already up-to-date
719 * MADE gn was recreated successfully
720 * ERROR An error occurred while gn was being created
721 * ABORTED gn was not remade because one of its inferiors
722 * could not be made due to errors.
723 */
724 errors = 0;
725 while (!Lst_IsEmpty (targs)) {
726 gn = (GNode *) Lst_DeQueue (targs);
727 CompatMake (gn, gn);
728
729 if (gn->made == UPTODATE) {
730 printf ("`%s' is up to date.\n", gn->name);
731 } else if (gn->made == ABORTED) {
732 printf ("`%s' not remade because of errors.\n", gn->name);
733 errors += 1;
734 }
735 }
736
737 /*
738 * If the user has defined a .END target, run its commands.
739 */
740 if (errors == 0) {
741 Lst_ForEach(ENDNode->commands, CompatRunCommand, (ClientData)gn);
742 }
743}
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