Annotation of src/usr.bin/make/engine.c, Revision 1.55
1.55 ! espie 1: /* $OpenBSD: engine.c,v 1.54 2017/07/24 12:08:15 espie Exp $ */
1.33 espie 2: /*
3: * Copyright (c) 2012 Marc Espie.
4: *
5: * Extensive code modifications for the OpenBSD project.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
17: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
20: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27: */
1.1 espie 28: /*
29: * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
30: * Copyright (c) 1988, 1989 by Adam de Boor
31: * Copyright (c) 1989 by Berkeley Softworks
32: * All rights reserved.
33: *
34: * This code is derived from software contributed to Berkeley by
35: * Adam de Boor.
36: *
37: * Redistribution and use in source and binary forms, with or without
38: * modification, are permitted provided that the following conditions
39: * are met:
40: * 1. Redistributions of source code must retain the above copyright
41: * notice, this list of conditions and the following disclaimer.
42: * 2. Redistributions in binary form must reproduce the above copyright
43: * notice, this list of conditions and the following disclaimer in the
44: * documentation and/or other materials provided with the distribution.
45: * 3. Neither the name of the University nor the names of its contributors
46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: */
61:
1.10 espie 62: #include <sys/types.h>
1.33 espie 63: #include <sys/time.h>
1.10 espie 64: #include <sys/wait.h>
1.20 espie 65: #include <assert.h>
1.41 espie 66: #include <ctype.h>
67: #include <errno.h>
68: #include <fcntl.h>
1.1 espie 69: #include <limits.h>
1.41 espie 70: #include <signal.h>
71: #include <stdint.h>
1.1 espie 72: #include <stdio.h>
1.10 espie 73: #include <stdlib.h>
1.41 espie 74: #include <string.h>
1.1 espie 75: #include <unistd.h>
76: #include "config.h"
77: #include "defines.h"
78: #include "dir.h"
79: #include "engine.h"
80: #include "arch.h"
81: #include "gnode.h"
82: #include "targ.h"
83: #include "var.h"
84: #include "extern.h"
85: #include "lst.h"
86: #include "timestamp.h"
87: #include "make.h"
1.10 espie 88: #include "pathnames.h"
89: #include "error.h"
90: #include "str.h"
91: #include "memory.h"
1.16 espie 92: #include "buf.h"
1.24 espie 93: #include "job.h"
1.33 espie 94: #include "lowparse.h"
1.1 espie 95:
96: static void MakeTimeStamp(void *, void *);
1.6 espie 97: static int rewrite_time(const char *);
1.10 espie 98: static void setup_meta(void);
1.33 espie 99: static void setup_engine(void);
1.10 espie 100: static char **recheck_command_for_shell(char **);
1.34 espie 101: static void list_parents(GNode *, FILE *);
1.10 espie 102:
1.36 espie 103: /* XXX due to a bug in make's logic, targets looking like *.a or -l*
104: * have been silently dropped when make couldn't figure them out.
105: * Now, we warn about them until all Makefile bugs have been fixed.
106: */
107: static bool
108: drop_silently(const char *s)
109: {
110: size_t len;
111:
112: if (s[0] == '-' && s[1] == 'l')
113: return true;
114:
115: len = strlen(s);
116: if (len >=2 && s[len-2] == '.' && s[len-1] == 'a')
117: return true;
118: return false;
119: }
120:
1.1 espie 121: bool
1.33 espie 122: node_find_valid_commands(GNode *gn)
1.1 espie 123: {
1.37 espie 124: if (DEBUG(DOUBLE) && (gn->type & OP_DOUBLE))
125: fprintf(stderr, "Warning: target %s had >1 lists of "
126: "shell commands (ignoring later ones)\n", gn->name);
1.34 espie 127: if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands)) {
1.36 espie 128: if (drop_silently(gn->name)) {
1.34 espie 129: printf("Warning: target %s", gn->name);
130: list_parents(gn, stdout);
1.36 espie 131: printf(" does not have any command (BUG)\n");
1.34 espie 132: return true;
133: }
1.3 espie 134: /*
135: * No commands. Look for .DEFAULT rule from which we might infer
136: * commands
137: */
1.28 espie 138: if ((gn->type & OP_NODEFAULT) == 0 &&
1.18 espie 139: (DEFAULT->type & OP_DUMMY) == 0 &&
1.9 espie 140: !Lst_IsEmpty(&DEFAULT->commands)) {
1.3 espie 141: /*
142: * Make only looks for a .DEFAULT if the node was never
143: * the target of an operator, so that's what we do too.
144: * If a .DEFAULT was given, we substitute its commands
145: * for gn's commands and set the IMPSRC variable to be
146: * the target's name The DEFAULT node acts like a
147: * transformation rule, in that gn also inherits any
148: * attributes or sources attached to .DEFAULT itself.
149: */
150: Make_HandleUse(DEFAULT, gn);
1.16 espie 151: Var(IMPSRC_INDEX, gn) = Var(TARGET_INDEX, gn);
1.3 espie 152: } else if (is_out_of_date(Dir_MTime(gn))) {
153: /*
154: * The node wasn't the target of an operator we have no
155: * .DEFAULT rule to go on and the target doesn't
156: * already exist. There's nothing more we can do for
1.28 espie 157: * this branch.
1.3 espie 158: */
1.20 espie 159: return false;
160: }
1.1 espie 161: }
1.3 espie 162: return true;
1.1 espie 163: }
164:
1.34 espie 165: static void
166: list_parents(GNode *gn, FILE *out)
167: {
168: LstNode ln;
169: bool first = true;
170:
171: for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Adv(ln)) {
172: GNode *p = Lst_Datum(ln);
173: if (!p->must_make)
174: continue;
175: if (first) {
176: fprintf(out, " (prerequisite of:");
177: first = false;
178: }
179: fprintf(out, " %s", p->name);
180: }
181: if (!first)
182: fprintf(out, ")");
183: }
184:
1.20 espie 185: void
1.33 espie 186: node_failure(GNode *gn)
1.20 espie 187: {
188: /*
189: If the -k flag wasn't given, we stop in
190: * our tracks, otherwise we just don't update this
191: * node's parents so they never get examined.
192: */
1.34 espie 193: const char *diag;
194: FILE *out;
1.20 espie 195:
196: if (gn->type & OP_OPTIONAL) {
1.34 espie 197: out = stdout;
198: diag = "(ignored)";
1.20 espie 199: } else if (keepgoing) {
1.34 espie 200: out = stdout;
201: diag = "(continuing)";
1.20 espie 202: } else {
1.34 espie 203: out = stderr;
204: diag = "";
205: }
206: fprintf(out, "make: don't know how to make %s", gn->name);
207: list_parents(gn, out);
208: fprintf(out, "%s\n", diag);
209: if (out == stdout)
210: fflush(stdout);
211: else {
1.33 espie 212: print_errors();
213: Punt(NULL);
1.20 espie 214: }
215: }
1.33 espie 216:
1.6 espie 217: /* touch files the hard way, by writing stuff to them */
218: static int
219: rewrite_time(const char *name)
220: {
221: int fd;
222: char c;
223:
224: fd = open(name, O_RDWR | O_CREAT, 0666);
225: if (fd < 0)
226: return -1;
227: /*
228: * Read and write a byte to the file to change
229: * the modification time.
230: */
231: if (read(fd, &c, 1) == 1) {
232: (void)lseek(fd, 0, SEEK_SET);
233: (void)write(fd, &c, 1);
234: }
235:
236: (void)close(fd);
237: return 0;
238: }
239:
1.1 espie 240: void
1.12 espie 241: Job_Touch(GNode *gn)
1.1 espie 242: {
1.33 espie 243: handle_all_signals();
1.26 espie 244: if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) {
1.3 espie 245: /*
1.9 espie 246: * .JOIN, .USE, and .OPTIONAL targets are "virtual" targets
247: * and, as such, shouldn't really be created.
1.26 espie 248: * Likewise, .PHONY targets are not really files
1.3 espie 249: */
250: return;
251: }
1.1 espie 252:
1.55 ! espie 253: if (!Targ_Silent(gn)) {
1.3 espie 254: (void)fprintf(stdout, "touch %s\n", gn->name);
255: (void)fflush(stdout);
256: }
1.1 espie 257:
1.3 espie 258: if (noExecute) {
259: return;
260: }
1.1 espie 261:
1.3 espie 262: if (gn->type & OP_ARCHV) {
263: Arch_Touch(gn);
264: } else {
265: const char *file = gn->path != NULL ? gn->path : gn->name;
266:
267: if (set_times(file) == -1){
1.6 espie 268: if (rewrite_time(file) == -1) {
1.49 gsoares 269: (void)fprintf(stderr,
1.5 espie 270: "*** couldn't touch %s: %s", file,
1.3 espie 271: strerror(errno));
1.9 espie 272: }
1.1 espie 273: }
274: }
275: }
276:
277: void
1.7 espie 278: Make_TimeStamp(GNode *parent, GNode *child)
1.1 espie 279: {
1.45 espie 280: if (is_strictly_before(parent->youngest->mtime, child->mtime)) {
1.44 espie 281: parent->youngest = child;
1.42 espie 282: }
1.1 espie 283: }
284:
285: void
1.9 espie 286: Make_HandleUse(GNode *cgn, /* The .USE node */
1.1 espie 287: GNode *pgn) /* The target of the .USE node */
288: {
1.3 espie 289: GNode *gn; /* A child of the .USE node */
290: LstNode ln; /* An element in the children list */
1.1 espie 291:
1.20 espie 292:
293: assert(cgn->type & (OP_USE|OP_TRANSFORM));
1.52 espie 294:
295: if (pgn == NULL)
296: Fatal("Trying to apply .USE to '%s' without a parent",
297: cgn->name);
1.20 espie 298:
299: if ((cgn->type & OP_USE) || Lst_IsEmpty(&pgn->commands)) {
300: /* .USE or transformation and target has no commands
301: * -- append the child's commands to the parent. */
302: Lst_Concat(&pgn->commands, &cgn->commands);
303: }
304:
305: for (ln = Lst_First(&cgn->children); ln != NULL;
306: ln = Lst_Adv(ln)) {
1.51 espie 307: gn = Lst_Datum(ln);
1.20 espie 308:
309: if (Lst_AddNew(&pgn->children, gn)) {
310: Lst_AtEnd(&gn->parents, pgn);
311: pgn->unmade++;
1.3 espie 312: }
1.20 espie 313: }
1.1 espie 314:
1.37 espie 315: if (DEBUG(DOUBLE) && (cgn->type & OP_DOUBLE))
316: fprintf(stderr,
317: "Warning: .USE %s expanded in %s had >1 lists of "
318: "shell commands (ignoring later ones)\n",
319: cgn->name, pgn->name);
320: pgn->type |= cgn->type & ~(OP_OPMASK|OP_USE|OP_TRANSFORM|OP_DOUBLE);
1.1 espie 321:
1.20 espie 322: /*
323: * This child node is now "made", so we decrement the count of
324: * unmade children in the parent... We also remove the child
325: * from the parent's list to accurately reflect the number of
326: * decent children the parent has. This is used by Make_Run to
327: * decide whether to queue the parent or examine its children...
328: */
329: if (cgn->type & OP_USE)
330: pgn->unmade--;
1.1 espie 331: }
332:
1.16 espie 333: void
334: Make_DoAllVar(GNode *gn)
1.1 espie 335: {
1.16 espie 336: GNode *child;
337: LstNode ln;
338: BUFFER allsrc, oodate;
339: char *target;
340: bool do_oodate;
341: int oodate_count, allsrc_count = 0;
342:
343: oodate_count = 0;
344: allsrc_count = 0;
1.39 espie 345:
346: Var(OODATE_INDEX, gn) = "";
347: Var(ALLSRC_INDEX, gn) = "";
1.16 espie 348:
349: for (ln = Lst_First(&gn->children); ln != NULL; ln = Lst_Adv(ln)) {
1.51 espie 350: child = Lst_Datum(ln);
1.16 espie 351: if ((child->type & (OP_EXEC|OP_USE|OP_INVISIBLE)) != 0)
352: continue;
1.9 espie 353: if (OP_NOP(child->type) ||
1.16 espie 354: (target = Var(TARGET_INDEX, child)) == NULL) {
1.3 espie 355: /*
356: * this node is only source; use the specific pathname
357: * for it
358: */
1.9 espie 359: target = child->path != NULL ? child->path :
360: child->name;
1.3 espie 361: }
1.1 espie 362:
1.16 espie 363: /*
364: * It goes in the OODATE variable if the parent is younger than
365: * the child or if the child has been modified more recently
366: * than the start of the make. This is to keep make from
367: * getting confused if something else updates the parent after
368: * the make starts (shouldn't happen, I know, but sometimes it
369: * does). In such a case, if we've updated the kid, the parent
370: * is likely to have a modification time later than that of the
371: * kid and anything that relies on the OODATE variable will be
372: * hosed.
373: */
374: do_oodate = false;
375: if (gn->type & OP_JOIN) {
1.14 espie 376: if (child->built_status == MADE)
1.16 espie 377: do_oodate = true;
378: } else if (is_strictly_before(gn->mtime, child->mtime) ||
1.43 espie 379: (!is_strictly_before(child->mtime, starttime) &&
1.16 espie 380: child->built_status == MADE))
381: do_oodate = true;
382: if (do_oodate) {
383: oodate_count++;
384: if (oodate_count == 1)
385: Var(OODATE_INDEX, gn) = target;
386: else {
387: if (oodate_count == 2) {
388: Buf_Init(&oodate, 0);
1.28 espie 389: Buf_AddString(&oodate,
1.16 espie 390: Var(OODATE_INDEX, gn));
391: }
392: Buf_AddSpace(&oodate);
393: Buf_AddString(&oodate, target);
394: }
395: }
396: allsrc_count++;
397: if (allsrc_count == 1)
398: Var(ALLSRC_INDEX, gn) = target;
399: else {
400: if (allsrc_count == 2) {
401: Buf_Init(&allsrc, 0);
1.28 espie 402: Buf_AddString(&allsrc,
1.16 espie 403: Var(ALLSRC_INDEX, gn));
404: }
405: Buf_AddSpace(&allsrc);
406: Buf_AddString(&allsrc, target);
1.3 espie 407: }
1.1 espie 408: }
409:
1.16 espie 410: if (allsrc_count > 1)
411: Var(ALLSRC_INDEX, gn) = Buf_Retrieve(&allsrc);
412: if (oodate_count > 1)
413: Var(OODATE_INDEX, gn) = Buf_Retrieve(&oodate);
1.1 espie 414:
1.13 espie 415: if (gn->impliedsrc)
1.16 espie 416: Var(IMPSRC_INDEX, gn) = Var(TARGET_INDEX, gn->impliedsrc);
1.28 espie 417:
1.3 espie 418: if (gn->type & OP_JOIN)
1.16 espie 419: Var(TARGET_INDEX, gn) = Var(ALLSRC_INDEX, gn);
1.1 espie 420: }
421:
422: /* Wrapper to call Make_TimeStamp from a forEach loop. */
423: static void
1.9 espie 424: MakeTimeStamp(void *parent, void *child)
1.1 espie 425: {
1.50 espie 426: Make_TimeStamp(parent, child);
1.1 espie 427: }
428:
429: bool
1.9 espie 430: Make_OODate(GNode *gn)
1.1 espie 431: {
1.9 espie 432: bool oodate;
1.1 espie 433:
434: /*
1.3 espie 435: * Certain types of targets needn't even be sought as their datedness
436: * doesn't depend on their modification time...
1.1 espie 437: */
1.15 espie 438: if ((gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_PHONY)) == 0) {
1.3 espie 439: (void)Dir_MTime(gn);
440: if (DEBUG(MAKE)) {
1.9 espie 441: if (!is_out_of_date(gn->mtime))
1.5 espie 442: printf("modified %s...",
1.43 espie 443: time_to_string(&gn->mtime));
1.9 espie 444: else
1.3 espie 445: printf("non-existent...");
446: }
1.1 espie 447: }
448:
449: /*
1.3 espie 450: * A target is remade in one of the following circumstances:
1.9 espie 451: * - its modification time is smaller than that of its youngest child
452: * and it would actually be run (has commands or type OP_NOP)
453: * - it's the object of a force operator
454: * - it has no children, was on the lhs of an operator and doesn't
455: * exist already.
1.3 espie 456: *
1.1 espie 457: */
1.3 espie 458: if (gn->type & OP_USE) {
459: /*
460: * If the node is a USE node it is *never* out of date
461: * no matter *what*.
462: */
1.9 espie 463: if (DEBUG(MAKE))
1.3 espie 464: printf(".USE node...");
465: oodate = false;
466: } else if (gn->type & OP_JOIN) {
467: /*
468: * A target with the .JOIN attribute is only considered
469: * out-of-date if any of its children was out-of-date.
470: */
1.9 espie 471: if (DEBUG(MAKE))
1.3 espie 472: printf(".JOIN node...");
473: oodate = gn->childMade;
474: } else if (gn->type & (OP_FORCE|OP_EXEC|OP_PHONY)) {
475: /*
1.9 espie 476: * A node which is the object of the force (!) operator or which
477: * has the .EXEC attribute is always considered out-of-date.
1.3 espie 478: */
479: if (DEBUG(MAKE)) {
1.9 espie 480: if (gn->type & OP_FORCE)
1.3 espie 481: printf("! operator...");
1.9 espie 482: else if (gn->type & OP_PHONY)
1.3 espie 483: printf(".PHONY node...");
1.9 espie 484: else
1.3 espie 485: printf(".EXEC node...");
486: }
487: oodate = true;
1.45 espie 488: } else if (is_strictly_before(gn->mtime, gn->youngest->mtime) ||
489: (gn == gn->youngest &&
1.3 espie 490: (is_out_of_date(gn->mtime) || (gn->type & OP_DOUBLEDEP)))) {
491: /*
492: * A node whose modification time is less than that of its
1.45 espie 493: * youngest child or that has no children (gn->youngest == gn)
494: * and either doesn't exist (mtime == OUT_OF_DATE)
1.9 espie 495: * or was the object of a :: operator is out-of-date.
1.3 espie 496: */
497: if (DEBUG(MAKE)) {
1.45 espie 498: if (is_strictly_before(gn->mtime, gn->youngest->mtime))
1.42 espie 499: printf("modified before source(%s)...",
500: gn->youngest->name);
1.9 espie 501: else if (is_out_of_date(gn->mtime))
1.3 espie 502: printf("non-existent and no sources...");
1.9 espie 503: else
1.3 espie 504: printf(":: operator and no sources...");
505: }
506: oodate = true;
507: } else {
508: oodate = false;
509: }
1.1 espie 510:
1.3 espie 511: /*
512: * If the target isn't out-of-date, the parents need to know its
513: * modification time. Note that targets that appear to be out-of-date
514: * but aren't, because they have no commands and aren't of type OP_NOP,
515: * have their mtime stay below their children's mtime to keep parents
516: * from thinking they're out-of-date.
517: */
518: if (!oodate)
519: Lst_ForEach(&gn->parents, MakeTimeStamp, gn);
1.1 espie 520:
1.3 espie 521: return oodate;
1.1 espie 522: }
523:
1.10 espie 524: /* The following array is used to make a fast determination of which
525: * characters are interpreted specially by the shell. If a command
526: * contains any of these characters, it is executed by the shell, not
527: * directly by us. */
528: static char meta[256];
529:
530: void
531: setup_meta(void)
532: {
533: char *p;
534:
1.48 espie 535: for (p = "#=|^(){};&<>*?[]:$`\\\n~"; *p != '\0'; p++)
1.10 espie 536: meta[(unsigned char) *p] = 1;
537: /* The null character serves as a sentinel in the string. */
538: meta[0] = 1;
539: }
540:
541: static char **
542: recheck_command_for_shell(char **av)
543: {
544: char *runsh[] = {
1.32 espie 545: "!", "alias", "cd", "eval", "exit", "read", "set", "ulimit",
1.10 espie 546: "unalias", "unset", "wait", "umask", NULL
547: };
548:
549: char **p;
550:
551: /* optimization: if exec cmd, we avoid the intermediate shell */
552: if (strcmp(av[0], "exec") == 0)
553: av++;
554:
555: for (p = runsh; *p; p++)
556: if (strcmp(av[0], *p) == 0)
557: return NULL;
558:
559: return av;
560: }
561:
1.40 espie 562: static void
1.10 espie 563: run_command(const char *cmd, bool errCheck)
564: {
565: const char *p;
566: char *shargv[4];
567: char **todo;
568:
569: shargv[0] = _PATH_BSHELL;
570:
571: shargv[1] = errCheck ? "-ec" : "-c";
572: shargv[2] = (char *)cmd;
573: shargv[3] = NULL;
574:
575: todo = shargv;
576:
577:
578: /* Search for meta characters in the command. If there are no meta
579: * characters, there's no need to execute a shell to execute the
580: * command. */
581: for (p = cmd; !meta[(unsigned char)*p]; p++)
582: continue;
583: if (*p == '\0') {
584: char *bp;
585: char **av;
586: int argc;
587: /* No meta-characters, so probably no need to exec a shell.
588: * Break the command into words to form an argument vector
589: * we can execute. */
590: av = brk_string(cmd, &argc, &bp);
591: av = recheck_command_for_shell(av);
592: if (av != NULL)
593: todo = av;
594: }
595: execvp(todo[0], todo);
596:
597: if (errno == ENOENT)
598: fprintf(stderr, "%s: not found\n", todo[0]);
599: else
600: perror(todo[0]);
601: _exit(1);
602: }
603:
1.33 espie 604: static Job myjob;
605:
606: void
607: job_attach_node(Job *job, GNode *node)
608: {
609: job->node = node;
1.34 espie 610: job->node->built_status = BUILDING;
1.33 espie 611: job->next_cmd = Lst_First(&node->commands);
612: job->exit_type = JOB_EXIT_OKAY;
613: job->location = NULL;
614: job->flags = 0;
615: }
616:
617: void
618: job_handle_status(Job *job, int status)
619: {
1.36 espie 620: bool silent;
1.38 espie 621: int dying;
1.36 espie 622:
623: /* if there's one job running and we don't keep going, no need
624: * to report right now.
625: */
626: if ((job->flags & JOB_ERRCHECK) && !keepgoing && runningJobs == NULL)
627: silent = !DEBUG(JOB);
628: else
629: silent = false;
630:
1.33 espie 631: debug_job_printf("Process %ld (%s) exited with status %d.\n",
632: (long)job->pid, job->node->name, status);
633:
634: /* classify status */
635: if (WIFEXITED(status)) {
636: job->code = WEXITSTATUS(status);/* exited */
1.38 espie 637: if (job->code != 0) {
638: /* if we're already dying from that signal, be silent */
639: if (!silent && job->code > 128
640: && job->code <= 128 + _NSIG) {
641: dying = check_dying_signal();
642: silent = dying && job->code == dying + 128;
643: }
1.36 espie 644: if (!silent)
645: printf("*** Error %d", job->code);
1.33 espie 646: job->exit_type = JOB_EXIT_BAD;
647: } else
648: job->exit_type = JOB_EXIT_OKAY;
649: } else {
650: job->exit_type = JOB_SIGNALED;
651: job->code = WTERMSIG(status); /* signaled */
1.38 espie 652: /* if we're already dying from that signal, be silent */
653: if (!silent) {
654: dying = check_dying_signal();
655: silent = dying && job->code == dying;
656: }
1.36 espie 657: if (!silent)
658: printf("*** Signal %d", job->code);
1.33 espie 659: }
660:
661: /* if there is a problem, what's going on ? */
662: if (job->exit_type != JOB_EXIT_OKAY) {
1.36 espie 663: if (!silent)
664: printf(" in target '%s'", job->node->name);
1.33 espie 665: if (job->flags & JOB_ERRCHECK) {
666: job->node->built_status = ERROR;
667: /* compute expensive status if we really want it */
668: if ((job->flags & JOB_SILENT) && job == &myjob)
669: determine_expensive_job(job);
670: if (!keepgoing) {
1.36 espie 671: if (!silent)
672: printf("\n");
1.33 espie 673: job->next = errorJobs;
674: errorJobs = job;
675: /* XXX don't free the command */
676: return;
677: }
678: printf(", line %lu of %s", job->location->lineno,
679: job->location->fname);
680: if ((job->flags & (JOB_SILENT | JOB_IS_EXPENSIVE))
681: == JOB_SILENT)
682: printf(": %s", job->cmd);
683: /* Abort the current target,
684: * but let others continue. */
685: printf(" (continuing)\n");
686: } else {
687: /* Continue executing commands for
688: * this target. If we return 0,
689: * this will happen... */
690: printf(" (ignored)\n");
691: job->exit_type = JOB_EXIT_OKAY;
692: }
693: }
694: free(job->cmd);
695: }
696:
697: int
698: run_gnode(GNode *gn)
699: {
700: if (!gn || (gn->type & OP_DUMMY))
701: return NOSUCHNODE;
702:
703: gn->built_status = MADE;
704:
705: job_attach_node(&myjob, gn);
706: while (myjob.exit_type == JOB_EXIT_OKAY) {
707: bool finished = job_run_next(&myjob);
708: if (finished)
709: break;
710: handle_one_job(&myjob);
711: }
712:
713: return gn->built_status;
714: }
715:
716:
717: static void
718: setup_engine(void)
719: {
720: static int already_setup = 0;
721:
722: if (!already_setup) {
723: setup_meta();
724: already_setup = 1;
725: }
726: }
727:
728: static bool
1.54 espie 729: do_run_command(Job *job, const char *pre)
1.10 espie 730: {
731: bool silent; /* Don't print command */
732: bool doExecute; /* Execute the command */
733: bool errCheck; /* Check errors */
1.33 espie 734: pid_t cpid; /* Child pid */
735:
736: const char *cmd = job->cmd;
1.55 ! espie 737: silent = Targ_Silent(job->node);
! 738: errCheck = !Targ_Ignore(job->node);
1.33 espie 739: if (job->node->type & OP_MAKE)
740: doExecute = true;
741: else
742: doExecute = !noExecute;
1.10 espie 743:
744: /* How can we execute a null command ? we warn the user that the
745: * command expanded to nothing (is this the right thing to do?). */
1.19 espie 746: if (*cmd == '\0') {
1.54 espie 747: Parse_Error(PARSE_WARNING,
748: "'%s' expands to '' while building %s",
749: pre, job->node->name);
1.33 espie 750: return false;
1.28 espie 751: }
1.10 espie 752:
753: for (;; cmd++) {
754: if (*cmd == '@')
755: silent = DEBUG(LOUD) ? false : true;
756: else if (*cmd == '-')
757: errCheck = false;
758: else if (*cmd == '+')
759: doExecute = true;
760: else
761: break;
762: }
1.47 espie 763: while (ISSPACE(*cmd))
1.10 espie 764: cmd++;
1.33 espie 765: /* Print the command before fork if make -n or !silent*/
766: if ( noExecute || !silent)
1.10 espie 767: printf("%s\n", cmd);
1.33 espie 768:
769: if (silent)
770: job->flags |= JOB_SILENT;
771: else
772: job->flags &= ~JOB_SILENT;
773:
1.10 espie 774: /* If we're not supposed to execute any commands, this is as far as
775: * we go... */
776: if (!doExecute)
1.33 espie 777: return false;
778: /* always flush for other stuff */
779: fflush(stdout);
1.53 espie 780:
781: /* Optimization: bypass comments entirely */
782: if (*cmd == '#')
783: return false;
1.10 espie 784:
785: /* Fork and execute the single command. If the fork fails, we abort. */
786: switch (cpid = fork()) {
787: case -1:
1.33 espie 788: Punt("Could not fork");
1.10 espie 789: /*NOTREACHED*/
790: case 0:
1.34 espie 791: /* put a random delay unless we're the only job running
792: * and there's nothing left to do.
793: */
794: if (random_delay)
795: if (!(runningJobs == NULL && no_jobs_left()))
1.46 naddy 796: usleep(arc4random_uniform(random_delay));
1.10 espie 797: run_command(cmd, errCheck);
798: /*NOTREACHED*/
799: default:
1.33 espie 800: job->pid = cpid;
801: job->next = runningJobs;
802: runningJobs = job;
803: if (errCheck)
804: job->flags |= JOB_ERRCHECK;
805: else
806: job->flags &= ~JOB_ERRCHECK;
807: debug_job_printf("Running %ld (%s) %s\n", (long)job->pid,
808: job->node->name, (noExecute || !silent) ? "" : cmd);
809: return true;
1.10 espie 810: }
811: }
812:
1.33 espie 813: bool
814: job_run_next(Job *job)
1.10 espie 815: {
1.33 espie 816: bool started;
817: GNode *gn = job->node;
1.19 espie 818:
1.33 espie 819: setup_engine();
820: while (job->next_cmd != NULL) {
821: struct command *command = Lst_Datum(job->next_cmd);
822:
823: handle_all_signals();
824: job->location = &command->location;
825: Parse_SetLocation(job->location);
826: job->cmd = Var_Subst(command->string, &gn->context, false);
827: job->next_cmd = Lst_Adv(job->next_cmd);
1.30 espie 828: if (fatal_errors)
1.33 espie 829: Punt(NULL);
1.54 espie 830: started = do_run_command(job, command->string);
1.33 espie 831: if (started)
832: return false;
833: else
834: free(job->cmd);
1.19 espie 835: }
1.33 espie 836: job->exit_type = JOB_EXIT_OKAY;
837: return true;
1.19 espie 838: }
839:
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