Annotation of src/usr.bin/make/compat.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: compat.c,v 1.11 1995/09/27 18:44:38 jtc Exp $ */
2:
3: /*
4: * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
5: * Copyright (c) 1988, 1989 by Adam de Boor
6: * Copyright (c) 1989 by Berkeley Softworks
7: * All rights reserved.
8: *
9: * This code is derived from software contributed to Berkeley by
10: * Adam de Boor.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the University of
23: * California, Berkeley and its contributors.
24: * 4. Neither the name of the University nor the names of its contributors
25: * may be used to endorse or promote products derived from this software
26: * without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38: * SUCH DAMAGE.
39: */
40:
41: #ifndef lint
42: #if 0
43: static char sccsid[] = "@(#)compat.c 5.7 (Berkeley) 3/1/91";
44: #else
45: static char rcsid[] = "$NetBSD: compat.c,v 1.11 1995/09/27 18:44:38 jtc Exp $";
46: #endif
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: #include <sys/wait.h>
66: #include <ctype.h>
67: #include <errno.h>
68: #include <signal.h>
69: #include "make.h"
70: #include "hash.h"
71: #include "dir.h"
72: #include "job.h"
73: extern int errno;
74:
75: /*
76: * The following array is used to make a fast determination of which
77: * characters are interpreted specially by the shell. If a command
78: * contains any of these characters, it is executed by the shell, not
79: * directly by us.
80: */
81:
82: static char meta[256];
83:
84: static GNode *curTarg = NILGNODE;
85: static GNode *ENDNode;
86: static void CompatInterrupt __P((int));
87: static int CompatRunCommand __P((ClientData, ClientData));
88: static int CompatMake __P((ClientData, ClientData));
89:
90: /*-
91: *-----------------------------------------------------------------------
92: * CompatInterrupt --
93: * Interrupt the creation of the current target and remove it if
94: * it ain't precious.
95: *
96: * Results:
97: * None.
98: *
99: * Side Effects:
100: * The target is removed and the process exits. If .INTERRUPT exists,
101: * its commands are run first WITH INTERRUPTS IGNORED..
102: *
103: *-----------------------------------------------------------------------
104: */
105: static void
106: CompatInterrupt (signo)
107: int signo;
108: {
109: GNode *gn;
110:
111: if ((curTarg != NILGNODE) && !Targ_Precious (curTarg)) {
112: char *p1;
113: char *file = Var_Value (TARGET, curTarg, &p1);
114: struct stat st;
115:
116: if (!noExecute && lstat(file, &st) != -1 && !S_ISDIR(st.st_mode) &&
117: unlink(file) != -1) {
118: printf ("*** %s removed\n", file);
119: }
120: if (p1)
121: free(p1);
122:
123: /*
124: * Run .INTERRUPT only if hit with interrupt signal
125: */
126: if (signo == SIGINT) {
127: gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
128: if (gn != NILGNODE) {
129: Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
130: }
131: }
132:
133: }
134: exit (signo);
135: }
136:
137: /*-
138: *-----------------------------------------------------------------------
139: * CompatRunCommand --
140: * Execute the next command for a target. If the command returns an
141: * error, the node's made field is set to ERROR and creation stops.
142: *
143: * Results:
144: * 0 if the command succeeded, 1 if an error occurred.
145: *
146: * Side Effects:
147: * The node's 'made' field may be set to ERROR.
148: *
149: *-----------------------------------------------------------------------
150: */
151: static int
152: CompatRunCommand (cmdp, gnp)
153: ClientData cmdp; /* Command to execute */
154: ClientData gnp; /* Node from which the command came */
155: {
156: char *cmdStart; /* Start of expanded command */
157: register char *cp;
158: Boolean silent, /* Don't print command */
159: errCheck; /* Check errors */
160: union wait reason; /* Reason for child's death */
161: int status; /* Description of child's death */
162: int cpid; /* Child actually found */
163: ReturnStatus stat; /* Status of fork */
164: LstNode cmdNode; /* Node where current command is located */
165: char **av; /* Argument vector for thing to exec */
166: int argc; /* Number of arguments in av or 0 if not
167: * dynamically allocated */
168: Boolean local; /* TRUE if command should be executed
169: * locally */
170: char *cmd = (char *) cmdp;
171: GNode *gn = (GNode *) gnp;
172:
173: /*
174: * Avoid clobbered variable warnings by forcing the compiler
175: * to ``unregister'' variables
176: */
177: #if __GNUC__
178: (void) &av;
179: (void) &errCheck;
180: #endif
181: silent = gn->type & OP_SILENT;
182: errCheck = !(gn->type & OP_IGNORE);
183:
184: cmdNode = Lst_Member (gn->commands, (ClientData)cmd);
185: cmdStart = Var_Subst (NULL, cmd, gn, FALSE);
186:
187: /*
188: * brk_string will return an argv with a NULL in av[1], thus causing
189: * execvp to choke and die horribly. Besides, how can we execute a null
190: * command? In any case, we warn the user that the command expanded to
191: * nothing (is this the right thing to do?).
192: */
193:
194: if (*cmdStart == '\0') {
195: free(cmdStart);
196: Error("%s expands to empty string", cmd);
197: return(0);
198: } else {
199: cmd = cmdStart;
200: }
201: Lst_Replace (cmdNode, (ClientData)cmdStart);
202:
203: if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
204: (void)Lst_AtEnd(ENDNode->commands, (ClientData)cmdStart);
205: return(0);
206: } else if (strcmp(cmdStart, "...") == 0) {
207: gn->type |= OP_SAVE_CMDS;
208: return(0);
209: }
210:
211: while ((*cmd == '@') || (*cmd == '-')) {
212: if (*cmd == '@') {
213: silent = TRUE;
214: } else {
215: errCheck = FALSE;
216: }
217: cmd++;
218: }
219:
220: while (isspace((unsigned char)*cmd))
221: cmd++;
222:
223: /*
224: * Search for meta characters in the command. If there are no meta
225: * characters, there's no need to execute a shell to execute the
226: * command.
227: */
228: for (cp = cmd; !meta[(unsigned char)*cp]; cp++) {
229: continue;
230: }
231:
232: /*
233: * Print the command before echoing if we're not supposed to be quiet for
234: * this one. We also print the command if -n given.
235: */
236: if (!silent || noExecute) {
237: printf ("%s\n", cmd);
238: fflush(stdout);
239: }
240:
241: /*
242: * If we're not supposed to execute any commands, this is as far as
243: * we go...
244: */
245: if (noExecute) {
246: return (0);
247: }
248:
249: if (*cp != '\0') {
250: /*
251: * If *cp isn't the null character, we hit a "meta" character and
252: * need to pass the command off to the shell. We give the shell the
253: * -e flag as well as -c if it's supposed to exit when it hits an
254: * error.
255: */
256: static char *shargv[4] = { "/bin/sh" };
257:
258: shargv[1] = (errCheck ? "-ec" : "-c");
259: shargv[2] = cmd;
260: shargv[3] = (char *)NULL;
261: av = shargv;
262: argc = 0;
263: } else {
264: /*
265: * No meta-characters, so no need to exec a shell. Break the command
266: * into words to form an argument vector we can execute.
267: * brk_string sticks our name in av[0], so we have to
268: * skip over it...
269: */
270: av = brk_string(cmd, &argc, TRUE);
271: av += 1;
272: }
273:
274: local = TRUE;
275:
276: /*
277: * Fork and execute the single command. If the fork fails, we abort.
278: */
279: cpid = vfork();
280: if (cpid < 0) {
281: Fatal("Could not fork");
282: }
283: if (cpid == 0) {
284: if (local) {
285: execvp(av[0], av);
286: (void) write (2, av[0], strlen (av[0]));
287: (void) write (2, ": not found\n", sizeof(": not found"));
288: } else {
289: (void)execv(av[0], av);
290: }
291: exit(1);
292: }
293: free(cmdStart);
294: Lst_Replace (cmdNode, (ClientData) NULL);
295:
296: /*
297: * The child is off and running. Now all we can do is wait...
298: */
299: while (1) {
300:
301: while ((stat = wait((int *)&reason)) != cpid) {
302: if (stat == -1 && errno != EINTR) {
303: break;
304: }
305: }
306:
307: if (stat > -1) {
308: if (WIFSTOPPED(reason)) {
309: status = reason.w_stopval; /* stopped */
310: } else if (WIFEXITED(reason)) {
311: status = reason.w_retcode; /* exited */
312: if (status != 0) {
313: printf ("*** Error code %d", status);
314: }
315: } else {
316: status = reason.w_termsig; /* signaled */
317: printf ("*** Signal %d", status);
318: }
319:
320:
321: if (!WIFEXITED(reason) || (status != 0)) {
322: if (errCheck) {
323: gn->made = ERROR;
324: if (keepgoing) {
325: /*
326: * Abort the current target, but let others
327: * continue.
328: */
329: printf (" (continuing)\n");
330: }
331: } else {
332: /*
333: * Continue executing commands for this target.
334: * If we return 0, this will happen...
335: */
336: printf (" (ignored)\n");
337: status = 0;
338: }
339: }
340: break;
341: } else {
342: Fatal ("error in wait: %d", stat);
343: /*NOTREACHED*/
344: }
345: }
346:
347: return (status);
348: }
349:
350: /*-
351: *-----------------------------------------------------------------------
352: * CompatMake --
353: * Make a target.
354: *
355: * Results:
356: * 0
357: *
358: * Side Effects:
359: * If an error is detected and not being ignored, the process exits.
360: *
361: *-----------------------------------------------------------------------
362: */
363: static int
364: CompatMake (gnp, pgnp)
365: ClientData gnp; /* The node to make */
366: ClientData pgnp; /* Parent to abort if necessary */
367: {
368: GNode *gn = (GNode *) gnp;
369: GNode *pgn = (GNode *) pgnp;
370: if (gn->type & OP_USE) {
371: Make_HandleUse(gn, pgn);
372: } else if (gn->made == UNMADE) {
373: /*
374: * First mark ourselves to be made, then apply whatever transformations
375: * the suffix module thinks are necessary. Once that's done, we can
376: * descend and make all our children. If any of them has an error
377: * but the -k flag was given, our 'make' field will be set FALSE again.
378: * This is our signal to not attempt to do anything but abort our
379: * parent as well.
380: */
381: gn->make = TRUE;
382: gn->made = BEINGMADE;
383: Suff_FindDeps (gn);
384: Lst_ForEach (gn->children, CompatMake, (ClientData)gn);
385: if (!gn->make) {
386: gn->made = ABORTED;
387: pgn->make = FALSE;
388: return (0);
389: }
390:
391: if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
392: char *p1;
393: Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
394: if (p1)
395: free(p1);
396: }
397:
398: /*
399: * All the children were made ok. Now cmtime contains the modification
400: * time of the newest child, we need to find out if we exist and when
401: * we were modified last. The criteria for datedness are defined by the
402: * Make_OODate function.
403: */
404: if (DEBUG(MAKE)) {
405: printf("Examining %s...", gn->name);
406: }
407: if (! Make_OODate(gn)) {
408: gn->made = UPTODATE;
409: if (DEBUG(MAKE)) {
410: printf("up-to-date.\n");
411: }
412: return (0);
413: } else if (DEBUG(MAKE)) {
414: printf("out-of-date.\n");
415: }
416:
417: /*
418: * If the user is just seeing if something is out-of-date, exit now
419: * to tell him/her "yes".
420: */
421: if (queryFlag) {
422: exit (-1);
423: }
424:
425: /*
426: * We need to be re-made. We also have to make sure we've got a $?
427: * variable. To be nice, we also define the $> variable using
428: * Make_DoAllVar().
429: */
430: Make_DoAllVar(gn);
431:
432: /*
433: * Alter our type to tell if errors should be ignored or things
434: * should not be printed so CompatRunCommand knows what to do.
435: */
436: if (Targ_Ignore (gn)) {
437: gn->type |= OP_IGNORE;
438: }
439: if (Targ_Silent (gn)) {
440: gn->type |= OP_SILENT;
441: }
442:
443: if (Job_CheckCommands (gn, Fatal)) {
444: /*
445: * Our commands are ok, but we still have to worry about the -t
446: * flag...
447: */
448: if (!touchFlag) {
449: curTarg = gn;
450: Lst_ForEach (gn->commands, CompatRunCommand, (ClientData)gn);
451: curTarg = NILGNODE;
452: } else {
453: Job_Touch (gn, gn->type & OP_SILENT);
454: }
455: } else {
456: gn->made = ERROR;
457: }
458:
459: if (gn->made != ERROR) {
460: /*
461: * If the node was made successfully, mark it so, update
462: * its modification time and timestamp all its parents. Note
463: * that for .ZEROTIME targets, the timestamping isn't done.
464: * This is to keep its state from affecting that of its parent.
465: */
466: gn->made = MADE;
467: #ifndef RECHECK
468: /*
469: * We can't re-stat the thing, but we can at least take care of
470: * rules where a target depends on a source that actually creates
471: * the target, but only if it has changed, e.g.
472: *
473: * parse.h : parse.o
474: *
475: * parse.o : parse.y
476: * yacc -d parse.y
477: * cc -c y.tab.c
478: * mv y.tab.o parse.o
479: * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
480: *
481: * In this case, if the definitions produced by yacc haven't
482: * changed from before, parse.h won't have been updated and
483: * gn->mtime will reflect the current modification time for
484: * parse.h. This is something of a kludge, I admit, but it's a
485: * useful one..
486: *
487: * XXX: People like to use a rule like
488: *
489: * FRC:
490: *
491: * To force things that depend on FRC to be made, so we have to
492: * check for gn->children being empty as well...
493: */
494: if (!Lst_IsEmpty(gn->commands) || Lst_IsEmpty(gn->children)) {
495: gn->mtime = now;
496: }
497: #else
498: /*
499: * This is what Make does and it's actually a good thing, as it
500: * allows rules like
501: *
502: * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
503: *
504: * to function as intended. Unfortunately, thanks to the stateless
505: * nature of NFS (and the speed of this program), there are times
506: * when the modification time of a file created on a remote
507: * machine will not be modified before the stat() implied by
508: * the Dir_MTime occurs, thus leading us to believe that the file
509: * is unchanged, wreaking havoc with files that depend on this one.
510: *
511: * I have decided it is better to make too much than to make too
512: * little, so this stuff is commented out unless you're sure it's
513: * ok.
514: * -- ardeb 1/12/88
515: */
516: if (noExecute || Dir_MTime(gn) == 0) {
517: gn->mtime = now;
518: }
519: if (gn->cmtime > gn->mtime)
520: gn->mtime = gn->cmtime;
521: if (DEBUG(MAKE)) {
522: printf("update time: %s\n", Targ_FmtTime(gn->mtime));
523: }
524: #endif
525: if (!(gn->type & OP_EXEC)) {
526: pgn->childMade = TRUE;
527: Make_TimeStamp(pgn, gn);
528: }
529: } else if (keepgoing) {
530: pgn->make = FALSE;
531: } else {
532: printf ("\n\nStop.\n");
533: exit (1);
534: }
535: } else if (gn->made == ERROR) {
536: /*
537: * Already had an error when making this beastie. Tell the parent
538: * to abort.
539: */
540: pgn->make = FALSE;
541: } else {
542: if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
543: char *p1;
544: Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
545: if (p1)
546: free(p1);
547: }
548: switch(gn->made) {
549: case BEINGMADE:
550: Error("Graph cycles through %s\n", gn->name);
551: gn->made = ERROR;
552: pgn->make = FALSE;
553: break;
554: case MADE:
555: if ((gn->type & OP_EXEC) == 0) {
556: pgn->childMade = TRUE;
557: Make_TimeStamp(pgn, gn);
558: }
559: break;
560: case UPTODATE:
561: if ((gn->type & OP_EXEC) == 0) {
562: Make_TimeStamp(pgn, gn);
563: }
564: break;
565: default:
566: break;
567: }
568: }
569:
570: return (0);
571: }
572:
573: /*-
574: *-----------------------------------------------------------------------
575: * Compat_Run --
576: * Initialize this mode and start making.
577: *
578: * Results:
579: * None.
580: *
581: * Side Effects:
582: * Guess what?
583: *
584: *-----------------------------------------------------------------------
585: */
586: void
587: Compat_Run(targs)
588: Lst targs; /* List of target nodes to re-create */
589: {
590: char *cp; /* Pointer to string of shell meta-characters */
591: GNode *gn = NULL;/* Current root target */
592: int errors; /* Number of targets not remade due to errors */
593:
594: if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
595: signal(SIGINT, CompatInterrupt);
596: }
597: if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
598: signal(SIGTERM, CompatInterrupt);
599: }
600: if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
601: signal(SIGHUP, CompatInterrupt);
602: }
603: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
604: signal(SIGQUIT, CompatInterrupt);
605: }
606:
607: for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
608: meta[(unsigned char) *cp] = 1;
609: }
610: /*
611: * The null character serves as a sentinel in the string.
612: */
613: meta[0] = 1;
614:
615: ENDNode = Targ_FindNode(".END", TARG_CREATE);
616: /*
617: * If the user has defined a .BEGIN target, execute the commands attached
618: * to it.
619: */
620: if (!queryFlag) {
621: gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
622: if (gn != NILGNODE) {
623: Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
624: }
625: }
626:
627: /*
628: * For each entry in the list of targets to create, call CompatMake on
629: * it to create the thing. CompatMake will leave the 'made' field of gn
630: * in one of several states:
631: * UPTODATE gn was already up-to-date
632: * MADE gn was recreated successfully
633: * ERROR An error occurred while gn was being created
634: * ABORTED gn was not remade because one of its inferiors
635: * could not be made due to errors.
636: */
637: errors = 0;
638: while (!Lst_IsEmpty (targs)) {
639: gn = (GNode *) Lst_DeQueue (targs);
640: CompatMake (gn, gn);
641:
642: if (gn->made == UPTODATE) {
643: printf ("`%s' is up to date.\n", gn->name);
644: } else if (gn->made == ABORTED) {
645: printf ("`%s' not remade because of errors.\n", gn->name);
646: errors += 1;
647: }
648: }
649:
650: /*
651: * If the user has defined a .END target, run its commands.
652: */
653: if (errors == 0) {
654: Lst_ForEach(ENDNode->commands, CompatRunCommand, (ClientData)gn);
655: }
656: }
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