xref: /freebsd/contrib/bmake/compat.c (revision 076ad2f836d5f49dc1375f1677335a48fe0d4b82)
1 /*	$NetBSD: compat.c,v 1.106 2016/08/26 23:28:39 dholland Exp $	*/
2 
3 /*
4  * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
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. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 /*
36  * Copyright (c) 1988, 1989 by Adam de Boor
37  * Copyright (c) 1989 by Berkeley Softworks
38  * All rights reserved.
39  *
40  * This code is derived from software contributed to Berkeley by
41  * Adam de Boor.
42  *
43  * Redistribution and use in source and binary forms, with or without
44  * modification, are permitted provided that the following conditions
45  * are met:
46  * 1. Redistributions of source code must retain the above copyright
47  *    notice, this list of conditions and the following disclaimer.
48  * 2. Redistributions in binary form must reproduce the above copyright
49  *    notice, this list of conditions and the following disclaimer in the
50  *    documentation and/or other materials provided with the distribution.
51  * 3. All advertising materials mentioning features or use of this software
52  *    must display the following acknowledgement:
53  *	This product includes software developed by the University of
54  *	California, Berkeley and its contributors.
55  * 4. Neither the name of the University nor the names of its contributors
56  *    may be used to endorse or promote products derived from this software
57  *    without specific prior written permission.
58  *
59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69  * SUCH DAMAGE.
70  */
71 
72 #ifndef MAKE_NATIVE
73 static char rcsid[] = "$NetBSD: compat.c,v 1.106 2016/08/26 23:28:39 dholland Exp $";
74 #else
75 #include <sys/cdefs.h>
76 #ifndef lint
77 #if 0
78 static char sccsid[] = "@(#)compat.c	8.2 (Berkeley) 3/19/94";
79 #else
80 __RCSID("$NetBSD: compat.c,v 1.106 2016/08/26 23:28:39 dholland Exp $");
81 #endif
82 #endif /* not lint */
83 #endif
84 
85 /*-
86  * compat.c --
87  *	The routines in this file implement the full-compatibility
88  *	mode of PMake. Most of the special functionality of PMake
89  *	is available in this mode. Things not supported:
90  *	    - different shells.
91  *	    - friendly variable substitution.
92  *
93  * Interface:
94  *	Compat_Run	    Initialize things for this module and recreate
95  *	    	  	    thems as need creatin'
96  */
97 
98 #ifdef HAVE_CONFIG_H
99 # include   "config.h"
100 #endif
101 #include    <sys/types.h>
102 #include    <sys/stat.h>
103 #include    "wait.h"
104 
105 #include    <ctype.h>
106 #include    <errno.h>
107 #include    <signal.h>
108 #include    <stdio.h>
109 
110 #include    "make.h"
111 #include    "hash.h"
112 #include    "dir.h"
113 #include    "job.h"
114 #include    "metachar.h"
115 #include    "pathnames.h"
116 
117 
118 static GNode	    *curTarg = NULL;
119 static GNode	    *ENDNode;
120 static void CompatInterrupt(int);
121 
122 /*
123  * CompatDeleteTarget -- delete a failed, interrupted, or otherwise
124  * duffed target if not inhibited by .PRECIOUS.
125  */
126 static void
127 CompatDeleteTarget(GNode *gn)
128 {
129     if ((gn != NULL) && !Targ_Precious (gn)) {
130 	char	  *p1;
131 	char 	  *file = Var_Value(TARGET, gn, &p1);
132 
133 	if (!noExecute && eunlink(file) != -1) {
134 	    Error("*** %s removed", file);
135 	}
136 
137 	free(p1);
138     }
139 }
140 
141 /*-
142  *-----------------------------------------------------------------------
143  * CompatInterrupt --
144  *	Interrupt the creation of the current target and remove it if
145  *	it ain't precious.
146  *
147  * Results:
148  *	None.
149  *
150  * Side Effects:
151  *	The target is removed and the process exits. If .INTERRUPT exists,
152  *	its commands are run first WITH INTERRUPTS IGNORED..
153  *
154  * XXX: is .PRECIOUS supposed to inhibit .INTERRUPT? I doubt it, but I've
155  * left the logic alone for now. - dholland 20160826
156  *
157  *-----------------------------------------------------------------------
158  */
159 static void
160 CompatInterrupt(int signo)
161 {
162     GNode   *gn;
163 
164     CompatDeleteTarget(curTarg);
165 
166     if ((curTarg != NULL) && !Targ_Precious (curTarg)) {
167 	/*
168 	 * Run .INTERRUPT only if hit with interrupt signal
169 	 */
170 	if (signo == SIGINT) {
171 	    gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
172 	    if (gn != NULL) {
173 		Compat_Make(gn, gn);
174 	    }
175 	}
176     }
177     if (signo == SIGQUIT)
178 	_exit(signo);
179     bmake_signal(signo, SIG_DFL);
180     kill(myPid, signo);
181 }
182 
183 /*-
184  *-----------------------------------------------------------------------
185  * CompatRunCommand --
186  *	Execute the next command for a target. If the command returns an
187  *	error, the node's made field is set to ERROR and creation stops.
188  *
189  * Input:
190  *	cmdp		Command to execute
191  *	gnp		Node from which the command came
192  *
193  * Results:
194  *	0 if the command succeeded, 1 if an error occurred.
195  *
196  * Side Effects:
197  *	The node's 'made' field may be set to ERROR.
198  *
199  *-----------------------------------------------------------------------
200  */
201 int
202 CompatRunCommand(void *cmdp, void *gnp)
203 {
204     char    	  *cmdStart;	/* Start of expanded command */
205     char 	  *cp, *bp;
206     Boolean 	  silent,   	/* Don't print command */
207 	    	  doIt;		/* Execute even if -n */
208     volatile Boolean errCheck; 	/* Check errors */
209     WAIT_T 	  reason;   	/* Reason for child's death */
210     int	    	  status;   	/* Description of child's death */
211     pid_t	  cpid;	    	/* Child actually found */
212     pid_t	  retstat;    	/* Result of wait */
213     LstNode 	  cmdNode;  	/* Node where current command is located */
214     const char  ** volatile av;	/* Argument vector for thing to exec */
215     char	** volatile mav;/* Copy of the argument vector for freeing */
216     int	    	  argc;	    	/* Number of arguments in av or 0 if not
217 				 * dynamically allocated */
218     Boolean 	  local;    	/* TRUE if command should be executed
219 				 * locally */
220     Boolean 	  useShell;    	/* TRUE if command should be executed
221 				 * using a shell */
222     char	  * volatile cmd = (char *)cmdp;
223     GNode	  *gn = (GNode *)gnp;
224 
225     silent = gn->type & OP_SILENT;
226     errCheck = !(gn->type & OP_IGNORE);
227     doIt = FALSE;
228 
229     cmdNode = Lst_Member(gn->commands, cmd);
230     cmdStart = Var_Subst(NULL, cmd, gn, VARF_WANTRES);
231 
232     /*
233      * brk_string will return an argv with a NULL in av[0], thus causing
234      * execvp to choke and die horribly. Besides, how can we execute a null
235      * command? In any case, we warn the user that the command expanded to
236      * nothing (is this the right thing to do?).
237      */
238 
239     if (*cmdStart == '\0') {
240 	free(cmdStart);
241 	return(0);
242     }
243     cmd = cmdStart;
244     Lst_Replace(cmdNode, cmdStart);
245 
246     if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
247 	(void)Lst_AtEnd(ENDNode->commands, cmdStart);
248 	return(0);
249     }
250     if (strcmp(cmdStart, "...") == 0) {
251 	gn->type |= OP_SAVE_CMDS;
252 	return(0);
253     }
254 
255     while ((*cmd == '@') || (*cmd == '-') || (*cmd == '+')) {
256 	switch (*cmd) {
257 	case '@':
258 	    silent = DEBUG(LOUD) ? FALSE : TRUE;
259 	    break;
260 	case '-':
261 	    errCheck = FALSE;
262 	    break;
263 	case '+':
264 	    doIt = TRUE;
265 	    if (!shellName)		/* we came here from jobs */
266 		Shell_Init();
267 	    break;
268 	}
269 	cmd++;
270     }
271 
272     while (isspace((unsigned char)*cmd))
273 	cmd++;
274 
275     /*
276      * If we did not end up with a command, just skip it.
277      */
278     if (!*cmd)
279 	return (0);
280 
281 #if !defined(MAKE_NATIVE)
282     /*
283      * In a non-native build, the host environment might be weird enough
284      * that it's necessary to go through a shell to get the correct
285      * behaviour.  Or perhaps the shell has been replaced with something
286      * that does extra logging, and that should not be bypassed.
287      */
288     useShell = TRUE;
289 #else
290     /*
291      * Search for meta characters in the command. If there are no meta
292      * characters, there's no need to execute a shell to execute the
293      * command.
294      *
295      * Additionally variable assignments and empty commands
296      * go to the shell. Therefore treat '=' and ':' like shell
297      * meta characters as documented in make(1).
298      */
299 
300     useShell = needshell(cmd, FALSE);
301 #endif
302 
303     /*
304      * Print the command before echoing if we're not supposed to be quiet for
305      * this one. We also print the command if -n given.
306      */
307     if (!silent || NoExecute(gn)) {
308 	printf("%s\n", cmd);
309 	fflush(stdout);
310     }
311 
312     /*
313      * If we're not supposed to execute any commands, this is as far as
314      * we go...
315      */
316     if (!doIt && NoExecute(gn)) {
317 	return (0);
318     }
319     if (DEBUG(JOB))
320 	fprintf(debug_file, "Execute: '%s'\n", cmd);
321 
322 again:
323     if (useShell) {
324 	/*
325 	 * We need to pass the command off to the shell, typically
326 	 * because the command contains a "meta" character.
327 	 */
328 	static const char *shargv[5];
329 	int shargc;
330 
331 	shargc = 0;
332 	shargv[shargc++] = shellPath;
333 	/*
334 	 * The following work for any of the builtin shell specs.
335 	 */
336 	if (errCheck && shellErrFlag) {
337 	    shargv[shargc++] = shellErrFlag;
338 	}
339 	if (DEBUG(SHELL))
340 		shargv[shargc++] = "-xc";
341 	else
342 		shargv[shargc++] = "-c";
343 	shargv[shargc++] = cmd;
344 	shargv[shargc++] = NULL;
345 	av = shargv;
346 	argc = 0;
347 	bp = NULL;
348 	mav = NULL;
349     } else {
350 	/*
351 	 * No meta-characters, so no need to exec a shell. Break the command
352 	 * into words to form an argument vector we can execute.
353 	 */
354 	mav = brk_string(cmd, &argc, TRUE, &bp);
355 	if (mav == NULL) {
356 		useShell = 1;
357 		goto again;
358 	}
359 	av = (void *)mav;
360     }
361 
362     local = TRUE;
363 
364 #ifdef USE_META
365     if (useMeta) {
366 	meta_compat_start();
367     }
368 #endif
369 
370     /*
371      * Fork and execute the single command. If the fork fails, we abort.
372      */
373     cpid = vFork();
374     if (cpid < 0) {
375 	Fatal("Could not fork");
376     }
377     if (cpid == 0) {
378 	Var_ExportVars();
379 #ifdef USE_META
380 	if (useMeta) {
381 	    meta_compat_child();
382 	}
383 #endif
384 	if (local)
385 	    (void)execvp(av[0], (char *const *)UNCONST(av));
386 	else
387 	    (void)execv(av[0], (char *const *)UNCONST(av));
388 	execError("exec", av[0]);
389 	_exit(1);
390     }
391 
392     free(mav);
393     free(bp);
394 
395     Lst_Replace(cmdNode, NULL);
396 
397 #ifdef USE_META
398     if (useMeta) {
399 	meta_compat_parent();
400     }
401 #endif
402 
403     /*
404      * The child is off and running. Now all we can do is wait...
405      */
406     while (1) {
407 
408 	while ((retstat = wait(&reason)) != cpid) {
409 	    if (retstat > 0)
410 		JobReapChild(retstat, reason, FALSE); /* not ours? */
411 	    if (retstat == -1 && errno != EINTR) {
412 		break;
413 	    }
414 	}
415 
416 	if (retstat > -1) {
417 	    if (WIFSTOPPED(reason)) {
418 		status = WSTOPSIG(reason);		/* stopped */
419 	    } else if (WIFEXITED(reason)) {
420 		status = WEXITSTATUS(reason);		/* exited */
421 #if defined(USE_META) && defined(USE_FILEMON_ONCE)
422 		if (useMeta) {
423 		    meta_cmd_finish(NULL);
424 		}
425 #endif
426 		if (status != 0) {
427 		    if (DEBUG(ERROR)) {
428 		        fprintf(debug_file, "\n*** Failed target:  %s\n*** Failed command: ",
429 			    gn->name);
430 		        for (cp = cmd; *cp; ) {
431     			    if (isspace((unsigned char)*cp)) {
432 				fprintf(debug_file, " ");
433 			        while (isspace((unsigned char)*cp))
434 				    cp++;
435 			    } else {
436 				fprintf(debug_file, "%c", *cp);
437 			        cp++;
438 			    }
439 		        }
440 			fprintf(debug_file, "\n");
441 		    }
442 		    printf("*** Error code %d", status);
443 		}
444 	    } else {
445 		status = WTERMSIG(reason);		/* signaled */
446 		printf("*** Signal %d", status);
447 	    }
448 
449 
450 	    if (!WIFEXITED(reason) || (status != 0)) {
451 		if (errCheck) {
452 #ifdef USE_META
453 		    if (useMeta) {
454 			meta_job_error(NULL, gn, 0, status);
455 		    }
456 #endif
457 		    gn->made = ERROR;
458 		    if (keepgoing) {
459 			/*
460 			 * Abort the current target, but let others
461 			 * continue.
462 			 */
463 			printf(" (continuing)\n");
464 		    } else {
465 			printf("\n");
466 		    }
467 		    if (deleteOnError) {
468 			    CompatDeleteTarget(gn);
469 		    }
470 		} else {
471 		    /*
472 		     * Continue executing commands for this target.
473 		     * If we return 0, this will happen...
474 		     */
475 		    printf(" (ignored)\n");
476 		    status = 0;
477 		}
478 	    }
479 	    break;
480 	} else {
481 	    Fatal("error in wait: %d: %s", retstat, strerror(errno));
482 	    /*NOTREACHED*/
483 	}
484     }
485     free(cmdStart);
486 
487     return (status);
488 }
489 
490 /*-
491  *-----------------------------------------------------------------------
492  * Compat_Make --
493  *	Make a target.
494  *
495  * Input:
496  *	gnp		The node to make
497  *	pgnp		Parent to abort if necessary
498  *
499  * Results:
500  *	0
501  *
502  * Side Effects:
503  *	If an error is detected and not being ignored, the process exits.
504  *
505  *-----------------------------------------------------------------------
506  */
507 int
508 Compat_Make(void *gnp, void *pgnp)
509 {
510     GNode *gn = (GNode *)gnp;
511     GNode *pgn = (GNode *)pgnp;
512 
513     if (!shellName)		/* we came here from jobs */
514 	Shell_Init();
515     if (gn->made == UNMADE && (gn == pgn || (pgn->type & OP_MADE) == 0)) {
516 	/*
517 	 * First mark ourselves to be made, then apply whatever transformations
518 	 * the suffix module thinks are necessary. Once that's done, we can
519 	 * descend and make all our children. If any of them has an error
520 	 * but the -k flag was given, our 'make' field will be set FALSE again.
521 	 * This is our signal to not attempt to do anything but abort our
522 	 * parent as well.
523 	 */
524 	gn->flags |= REMAKE;
525 	gn->made = BEINGMADE;
526 	if ((gn->type & OP_MADE) == 0)
527 	    Suff_FindDeps(gn);
528 	Lst_ForEach(gn->children, Compat_Make, gn);
529 	if ((gn->flags & REMAKE) == 0) {
530 	    gn->made = ABORTED;
531 	    pgn->flags &= ~REMAKE;
532 	    goto cohorts;
533 	}
534 
535 	if (Lst_Member(gn->iParents, pgn) != NULL) {
536 	    char *p1;
537 	    Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn, 0);
538 	    free(p1);
539 	}
540 
541 	/*
542 	 * All the children were made ok. Now cmgn->mtime contains the
543 	 * modification time of the newest child, we need to find out if we
544 	 * exist and when we were modified last. The criteria for datedness
545 	 * are defined by the Make_OODate function.
546 	 */
547 	if (DEBUG(MAKE)) {
548 	    fprintf(debug_file, "Examining %s...", gn->name);
549 	}
550 	if (! Make_OODate(gn)) {
551 	    gn->made = UPTODATE;
552 	    if (DEBUG(MAKE)) {
553 		fprintf(debug_file, "up-to-date.\n");
554 	    }
555 	    goto cohorts;
556 	} else if (DEBUG(MAKE)) {
557 	    fprintf(debug_file, "out-of-date.\n");
558 	}
559 
560 	/*
561 	 * If the user is just seeing if something is out-of-date, exit now
562 	 * to tell him/her "yes".
563 	 */
564 	if (queryFlag) {
565 	    exit(1);
566 	}
567 
568 	/*
569 	 * We need to be re-made. We also have to make sure we've got a $?
570 	 * variable. To be nice, we also define the $> variable using
571 	 * Make_DoAllVar().
572 	 */
573 	Make_DoAllVar(gn);
574 
575 	/*
576 	 * Alter our type to tell if errors should be ignored or things
577 	 * should not be printed so CompatRunCommand knows what to do.
578 	 */
579 	if (Targ_Ignore(gn)) {
580 	    gn->type |= OP_IGNORE;
581 	}
582 	if (Targ_Silent(gn)) {
583 	    gn->type |= OP_SILENT;
584 	}
585 
586 	if (Job_CheckCommands(gn, Fatal)) {
587 	    /*
588 	     * Our commands are ok, but we still have to worry about the -t
589 	     * flag...
590 	     */
591 	    if (!touchFlag || (gn->type & OP_MAKE)) {
592 		curTarg = gn;
593 #ifdef USE_META
594 		if (useMeta && !NoExecute(gn)) {
595 		    meta_job_start(NULL, gn);
596 		}
597 #endif
598 		Lst_ForEach(gn->commands, CompatRunCommand, gn);
599 		curTarg = NULL;
600 	    } else {
601 		Job_Touch(gn, gn->type & OP_SILENT);
602 	    }
603 	} else {
604 	    gn->made = ERROR;
605 	}
606 #ifdef USE_META
607 	if (useMeta && !NoExecute(gn)) {
608 	    if (meta_job_finish(NULL) != 0)
609 		gn->made = ERROR;
610 	}
611 #endif
612 
613 	if (gn->made != ERROR) {
614 	    /*
615 	     * If the node was made successfully, mark it so, update
616 	     * its modification time and timestamp all its parents. Note
617 	     * that for .ZEROTIME targets, the timestamping isn't done.
618 	     * This is to keep its state from affecting that of its parent.
619 	     */
620 	    gn->made = MADE;
621 	    pgn->flags |= Make_Recheck(gn) == 0 ? FORCE : 0;
622 	    if (!(gn->type & OP_EXEC)) {
623 		pgn->flags |= CHILDMADE;
624 		Make_TimeStamp(pgn, gn);
625 	    }
626 	} else if (keepgoing) {
627 	    pgn->flags &= ~REMAKE;
628 	} else {
629 	    PrintOnError(gn, "\nStop.");
630 	    exit(1);
631 	}
632     } else if (gn->made == ERROR) {
633 	/*
634 	 * Already had an error when making this beastie. Tell the parent
635 	 * to abort.
636 	 */
637 	pgn->flags &= ~REMAKE;
638     } else {
639 	if (Lst_Member(gn->iParents, pgn) != NULL) {
640 	    char *p1;
641 	    Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn, 0);
642 	    free(p1);
643 	}
644 	switch(gn->made) {
645 	    case BEINGMADE:
646 		Error("Graph cycles through %s", gn->name);
647 		gn->made = ERROR;
648 		pgn->flags &= ~REMAKE;
649 		break;
650 	    case MADE:
651 		if ((gn->type & OP_EXEC) == 0) {
652 		    pgn->flags |= CHILDMADE;
653 		    Make_TimeStamp(pgn, gn);
654 		}
655 		break;
656 	    case UPTODATE:
657 		if ((gn->type & OP_EXEC) == 0) {
658 		    Make_TimeStamp(pgn, gn);
659 		}
660 		break;
661 	    default:
662 		break;
663 	}
664     }
665 
666 cohorts:
667     Lst_ForEach(gn->cohorts, Compat_Make, pgnp);
668     return (0);
669 }
670 
671 /*-
672  *-----------------------------------------------------------------------
673  * Compat_Run --
674  *	Initialize this mode and start making.
675  *
676  * Input:
677  *	targs		List of target nodes to re-create
678  *
679  * Results:
680  *	None.
681  *
682  * Side Effects:
683  *	Guess what?
684  *
685  *-----------------------------------------------------------------------
686  */
687 void
688 Compat_Run(Lst targs)
689 {
690     GNode   	  *gn = NULL;/* Current root target */
691     int	    	  errors;   /* Number of targets not remade due to errors */
692 
693     if (!shellName)
694 	Shell_Init();
695 
696     if (bmake_signal(SIGINT, SIG_IGN) != SIG_IGN) {
697 	bmake_signal(SIGINT, CompatInterrupt);
698     }
699     if (bmake_signal(SIGTERM, SIG_IGN) != SIG_IGN) {
700 	bmake_signal(SIGTERM, CompatInterrupt);
701     }
702     if (bmake_signal(SIGHUP, SIG_IGN) != SIG_IGN) {
703 	bmake_signal(SIGHUP, CompatInterrupt);
704     }
705     if (bmake_signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
706 	bmake_signal(SIGQUIT, CompatInterrupt);
707     }
708 
709     ENDNode = Targ_FindNode(".END", TARG_CREATE);
710     ENDNode->type = OP_SPECIAL;
711     /*
712      * If the user has defined a .BEGIN target, execute the commands attached
713      * to it.
714      */
715     if (!queryFlag) {
716 	gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
717 	if (gn != NULL) {
718 	    Compat_Make(gn, gn);
719             if (gn->made == ERROR) {
720                 PrintOnError(gn, "\nStop.");
721                 exit(1);
722             }
723 	}
724     }
725 
726     /*
727      * Expand .USE nodes right now, because they can modify the structure
728      * of the tree.
729      */
730     Make_ExpandUse(targs);
731 
732     /*
733      * For each entry in the list of targets to create, call Compat_Make on
734      * it to create the thing. Compat_Make will leave the 'made' field of gn
735      * in one of several states:
736      *	    UPTODATE	    gn was already up-to-date
737      *	    MADE  	    gn was recreated successfully
738      *	    ERROR 	    An error occurred while gn was being created
739      *	    ABORTED	    gn was not remade because one of its inferiors
740      *	    	  	    could not be made due to errors.
741      */
742     errors = 0;
743     while (!Lst_IsEmpty (targs)) {
744 	gn = (GNode *)Lst_DeQueue(targs);
745 	Compat_Make(gn, gn);
746 
747 	if (gn->made == UPTODATE) {
748 	    printf("`%s' is up to date.\n", gn->name);
749 	} else if (gn->made == ABORTED) {
750 	    printf("`%s' not remade because of errors.\n", gn->name);
751 	    errors += 1;
752 	}
753     }
754 
755     /*
756      * If the user has defined a .END target, run its commands.
757      */
758     if (errors == 0) {
759 	Compat_Make(ENDNode, ENDNode);
760 	if (gn->made == ERROR) {
761 	    PrintOnError(gn, "\nStop.");
762 	    exit(1);
763 	}
764     }
765 }
766