Annotation of src/usr.bin/make/engine.c, Revision 1.70
1.70 ! kn 1: /* $OpenBSD: engine.c,v 1.69 2020/01/26 12:41:21 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();
1.69 espie 244: if (gn->type & (OP_USE|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: assert(cgn->type & (OP_USE|OP_TRANSFORM));
1.52 espie 293:
294: if (pgn == NULL)
295: Fatal("Trying to apply .USE to '%s' without a parent",
296: cgn->name);
1.20 espie 297:
298: if ((cgn->type & OP_USE) || Lst_IsEmpty(&pgn->commands)) {
299: /* .USE or transformation and target has no commands
300: * -- append the child's commands to the parent. */
301: Lst_Concat(&pgn->commands, &cgn->commands);
302: }
303:
304: for (ln = Lst_First(&cgn->children); ln != NULL;
305: ln = Lst_Adv(ln)) {
1.51 espie 306: gn = Lst_Datum(ln);
1.20 espie 307:
308: if (Lst_AddNew(&pgn->children, gn)) {
309: Lst_AtEnd(&gn->parents, pgn);
1.58 espie 310: pgn->children_left++;
1.3 espie 311: }
1.20 espie 312: }
1.1 espie 313:
1.37 espie 314: if (DEBUG(DOUBLE) && (cgn->type & OP_DOUBLE))
315: fprintf(stderr,
316: "Warning: .USE %s expanded in %s had >1 lists of "
317: "shell commands (ignoring later ones)\n",
318: cgn->name, pgn->name);
319: pgn->type |= cgn->type & ~(OP_OPMASK|OP_USE|OP_TRANSFORM|OP_DOUBLE);
1.1 espie 320:
1.20 espie 321: /*
1.58 espie 322: * This child node is now built, so we decrement the count of
323: * not yet built children in the parent... We also remove the child
1.20 espie 324: * from the parent's list to accurately reflect the number of
1.58 espie 325: * remaining children the parent has. This is used by Make_Run to
1.20 espie 326: * decide whether to queue the parent or examine its children...
327: */
328: if (cgn->type & OP_USE)
1.58 espie 329: pgn->children_left--;
1.1 espie 330: }
331:
1.16 espie 332: void
333: Make_DoAllVar(GNode *gn)
1.1 espie 334: {
1.16 espie 335: GNode *child;
336: LstNode ln;
337: BUFFER allsrc, oodate;
338: char *target;
339: bool do_oodate;
340: int oodate_count, allsrc_count = 0;
341:
342: oodate_count = 0;
343: allsrc_count = 0;
1.39 espie 344:
345: Var(OODATE_INDEX, gn) = "";
346: Var(ALLSRC_INDEX, gn) = "";
1.16 espie 347:
348: for (ln = Lst_First(&gn->children); ln != NULL; ln = Lst_Adv(ln)) {
1.51 espie 349: child = Lst_Datum(ln);
1.69 espie 350: if ((child->type & (OP_USE|OP_INVISIBLE)) != 0)
1.16 espie 351: continue;
1.9 espie 352: if (OP_NOP(child->type) ||
1.16 espie 353: (target = Var(TARGET_INDEX, child)) == NULL) {
1.3 espie 354: /*
355: * this node is only source; use the specific pathname
356: * for it
357: */
1.9 espie 358: target = child->path != NULL ? child->path :
359: child->name;
1.3 espie 360: }
1.1 espie 361:
1.16 espie 362: /*
363: * It goes in the OODATE variable if the parent is younger than
364: * the child or if the child has been modified more recently
365: * than the start of the make. This is to keep make from
366: * getting confused if something else updates the parent after
367: * the make starts (shouldn't happen, I know, but sometimes it
368: * does). In such a case, if we've updated the kid, the parent
369: * is likely to have a modification time later than that of the
370: * kid and anything that relies on the OODATE variable will be
371: * hosed.
372: */
373: do_oodate = false;
1.69 espie 374: if (is_strictly_before(gn->mtime, child->mtime) ||
1.43 espie 375: (!is_strictly_before(child->mtime, starttime) &&
1.57 espie 376: child->built_status == REBUILT))
1.16 espie 377: do_oodate = true;
378: if (do_oodate) {
379: oodate_count++;
380: if (oodate_count == 1)
381: Var(OODATE_INDEX, gn) = target;
382: else {
383: if (oodate_count == 2) {
384: Buf_Init(&oodate, 0);
1.28 espie 385: Buf_AddString(&oodate,
1.16 espie 386: Var(OODATE_INDEX, gn));
387: }
388: Buf_AddSpace(&oodate);
389: Buf_AddString(&oodate, target);
390: }
391: }
392: allsrc_count++;
393: if (allsrc_count == 1)
394: Var(ALLSRC_INDEX, gn) = target;
395: else {
396: if (allsrc_count == 2) {
397: Buf_Init(&allsrc, 0);
1.28 espie 398: Buf_AddString(&allsrc,
1.16 espie 399: Var(ALLSRC_INDEX, gn));
400: }
401: Buf_AddSpace(&allsrc);
402: Buf_AddString(&allsrc, target);
1.3 espie 403: }
1.1 espie 404: }
405:
1.16 espie 406: if (allsrc_count > 1)
407: Var(ALLSRC_INDEX, gn) = Buf_Retrieve(&allsrc);
408: if (oodate_count > 1)
409: Var(OODATE_INDEX, gn) = Buf_Retrieve(&oodate);
1.1 espie 410:
1.13 espie 411: if (gn->impliedsrc)
1.16 espie 412: Var(IMPSRC_INDEX, gn) = Var(TARGET_INDEX, gn->impliedsrc);
1.1 espie 413: }
414:
415: /* Wrapper to call Make_TimeStamp from a forEach loop. */
416: static void
1.9 espie 417: MakeTimeStamp(void *parent, void *child)
1.1 espie 418: {
1.50 espie 419: Make_TimeStamp(parent, child);
1.1 espie 420: }
421:
422: bool
1.9 espie 423: Make_OODate(GNode *gn)
1.1 espie 424: {
1.9 espie 425: bool oodate;
1.1 espie 426:
427: /*
1.3 espie 428: * Certain types of targets needn't even be sought as their datedness
429: * doesn't depend on their modification time...
1.1 espie 430: */
1.69 espie 431: if ((gn->type & (OP_USE|OP_PHONY)) == 0) {
1.3 espie 432: (void)Dir_MTime(gn);
433: if (DEBUG(MAKE)) {
1.9 espie 434: if (!is_out_of_date(gn->mtime))
1.5 espie 435: printf("modified %s...",
1.43 espie 436: time_to_string(&gn->mtime));
1.9 espie 437: else
1.3 espie 438: printf("non-existent...");
439: }
1.1 espie 440: }
441:
442: /*
1.58 espie 443: * A target is rebuilt in one of the following circumstances:
1.9 espie 444: * - its modification time is smaller than that of its youngest child
445: * and it would actually be run (has commands or type OP_NOP)
446: * - it's the object of a force operator
447: * - it has no children, was on the lhs of an operator and doesn't
448: * exist already.
1.3 espie 449: *
1.1 espie 450: */
1.3 espie 451: if (gn->type & OP_USE) {
452: /*
453: * If the node is a USE node it is *never* out of date
454: * no matter *what*.
455: */
1.9 espie 456: if (DEBUG(MAKE))
1.3 espie 457: printf(".USE node...");
458: oodate = false;
1.69 espie 459: } else if (gn->type & (OP_FORCE|OP_PHONY)) {
1.3 espie 460: /*
1.9 espie 461: * A node which is the object of the force (!) operator or which
462: * has the .EXEC attribute is always considered out-of-date.
1.3 espie 463: */
464: if (DEBUG(MAKE)) {
1.9 espie 465: if (gn->type & OP_FORCE)
1.3 espie 466: printf("! operator...");
1.9 espie 467: else if (gn->type & OP_PHONY)
1.3 espie 468: printf(".PHONY node...");
1.9 espie 469: else
1.3 espie 470: printf(".EXEC node...");
471: }
472: oodate = true;
1.45 espie 473: } else if (is_strictly_before(gn->mtime, gn->youngest->mtime) ||
474: (gn == gn->youngest &&
1.3 espie 475: (is_out_of_date(gn->mtime) || (gn->type & OP_DOUBLEDEP)))) {
476: /*
477: * A node whose modification time is less than that of its
1.45 espie 478: * youngest child or that has no children (gn->youngest == gn)
479: * and either doesn't exist (mtime == OUT_OF_DATE)
1.9 espie 480: * or was the object of a :: operator is out-of-date.
1.3 espie 481: */
482: if (DEBUG(MAKE)) {
1.45 espie 483: if (is_strictly_before(gn->mtime, gn->youngest->mtime))
1.42 espie 484: printf("modified before source(%s)...",
485: gn->youngest->name);
1.9 espie 486: else if (is_out_of_date(gn->mtime))
1.3 espie 487: printf("non-existent and no sources...");
1.9 espie 488: else
1.3 espie 489: printf(":: operator and no sources...");
490: }
491: oodate = true;
492: } else {
493: oodate = false;
494: }
1.1 espie 495:
1.3 espie 496: /*
497: * If the target isn't out-of-date, the parents need to know its
498: * modification time. Note that targets that appear to be out-of-date
499: * but aren't, because they have no commands and aren't of type OP_NOP,
500: * have their mtime stay below their children's mtime to keep parents
501: * from thinking they're out-of-date.
502: */
503: if (!oodate)
504: Lst_ForEach(&gn->parents, MakeTimeStamp, gn);
1.1 espie 505:
1.3 espie 506: return oodate;
1.1 espie 507: }
508:
1.10 espie 509: /* The following array is used to make a fast determination of which
510: * characters are interpreted specially by the shell. If a command
511: * contains any of these characters, it is executed by the shell, not
512: * directly by us. */
513: static char meta[256];
514:
515: void
516: setup_meta(void)
517: {
518: char *p;
519:
1.48 espie 520: for (p = "#=|^(){};&<>*?[]:$`\\\n~"; *p != '\0'; p++)
1.10 espie 521: meta[(unsigned char) *p] = 1;
522: /* The null character serves as a sentinel in the string. */
523: meta[0] = 1;
524: }
525:
526: static char **
527: recheck_command_for_shell(char **av)
528: {
529: char *runsh[] = {
1.32 espie 530: "!", "alias", "cd", "eval", "exit", "read", "set", "ulimit",
1.10 espie 531: "unalias", "unset", "wait", "umask", NULL
532: };
533:
534: char **p;
535:
536: /* optimization: if exec cmd, we avoid the intermediate shell */
537: if (strcmp(av[0], "exec") == 0)
538: av++;
1.56 espie 539:
540: if (!av[0])
541: return NULL;
1.10 espie 542:
543: for (p = runsh; *p; p++)
544: if (strcmp(av[0], *p) == 0)
545: return NULL;
546:
547: return av;
548: }
549:
1.40 espie 550: static void
1.10 espie 551: run_command(const char *cmd, bool errCheck)
552: {
553: const char *p;
554: char *shargv[4];
555: char **todo;
556:
557: shargv[0] = _PATH_BSHELL;
558:
559: shargv[1] = errCheck ? "-ec" : "-c";
560: shargv[2] = (char *)cmd;
561: shargv[3] = NULL;
562:
563: todo = shargv;
564:
565:
566: /* Search for meta characters in the command. If there are no meta
567: * characters, there's no need to execute a shell to execute the
568: * command. */
569: for (p = cmd; !meta[(unsigned char)*p]; p++)
570: continue;
571: if (*p == '\0') {
572: char *bp;
573: char **av;
574: int argc;
575: /* No meta-characters, so probably no need to exec a shell.
576: * Break the command into words to form an argument vector
577: * we can execute. */
578: av = brk_string(cmd, &argc, &bp);
579: av = recheck_command_for_shell(av);
580: if (av != NULL)
581: todo = av;
582: }
583: execvp(todo[0], todo);
584:
585: if (errno == ENOENT)
586: fprintf(stderr, "%s: not found\n", todo[0]);
587: else
588: perror(todo[0]);
589: _exit(1);
590: }
591:
1.33 espie 592: void
593: job_attach_node(Job *job, GNode *node)
594: {
595: job->node = node;
1.34 espie 596: job->node->built_status = BUILDING;
1.33 espie 597: job->next_cmd = Lst_First(&node->commands);
598: job->exit_type = JOB_EXIT_OKAY;
599: job->location = NULL;
600: job->flags = 0;
601: }
602:
603: void
1.64 espie 604: handle_job_status(Job *job, int status)
1.33 espie 605: {
1.36 espie 606: bool silent;
1.38 espie 607: int dying;
1.36 espie 608:
609: /* if there's one job running and we don't keep going, no need
610: * to report right now.
611: */
612: if ((job->flags & JOB_ERRCHECK) && !keepgoing && runningJobs == NULL)
613: silent = !DEBUG(JOB);
614: else
615: silent = false;
616:
1.33 espie 617: debug_job_printf("Process %ld (%s) exited with status %d.\n",
618: (long)job->pid, job->node->name, status);
619:
620: /* classify status */
621: if (WIFEXITED(status)) {
622: job->code = WEXITSTATUS(status);/* exited */
1.38 espie 623: if (job->code != 0) {
624: /* if we're already dying from that signal, be silent */
625: if (!silent && job->code > 128
626: && job->code <= 128 + _NSIG) {
627: dying = check_dying_signal();
628: silent = dying && job->code == dying + 128;
629: }
1.36 espie 630: if (!silent)
631: printf("*** Error %d", job->code);
1.33 espie 632: job->exit_type = JOB_EXIT_BAD;
633: } else
634: job->exit_type = JOB_EXIT_OKAY;
635: } else {
636: job->exit_type = JOB_SIGNALED;
637: job->code = WTERMSIG(status); /* signaled */
1.38 espie 638: /* if we're already dying from that signal, be silent */
639: if (!silent) {
640: dying = check_dying_signal();
641: silent = dying && job->code == dying;
642: }
1.36 espie 643: if (!silent)
644: printf("*** Signal %d", job->code);
1.33 espie 645: }
646:
647: /* if there is a problem, what's going on ? */
648: if (job->exit_type != JOB_EXIT_OKAY) {
1.36 espie 649: if (!silent)
650: printf(" in target '%s'", job->node->name);
1.33 espie 651: if (job->flags & JOB_ERRCHECK) {
652: job->node->built_status = ERROR;
653: if (!keepgoing) {
1.36 espie 654: if (!silent)
655: printf("\n");
1.65 espie 656: job->flags |= JOB_KEEPERROR;
1.33 espie 657: /* XXX don't free the command */
658: return;
659: }
660: printf(", line %lu of %s", job->location->lineno,
661: job->location->fname);
1.62 espie 662: /* Parallel make already determined whether
663: * JOB_IS_EXPENSIVE, perform the computation for
664: * sequential make to figure out whether to display the
665: * command or not. */
1.63 espie 666: if ((job->flags & JOB_SILENT) && sequential)
1.61 espie 667: determine_expensive_job(job);
1.33 espie 668: if ((job->flags & (JOB_SILENT | JOB_IS_EXPENSIVE))
669: == JOB_SILENT)
670: printf(": %s", job->cmd);
671: /* Abort the current target,
672: * but let others continue. */
673: printf(" (continuing)\n");
674: } else {
675: /* Continue executing commands for
676: * this target. If we return 0,
677: * this will happen... */
678: printf(" (ignored)\n");
679: job->exit_type = JOB_EXIT_OKAY;
680: }
681: }
682: free(job->cmd);
683: }
684:
685: int
686: run_gnode(GNode *gn)
687: {
688: if (!gn || (gn->type & OP_DUMMY))
689: return NOSUCHNODE;
690:
1.67 espie 691: Job_Make(gn);
692: loop_handle_running_jobs();
1.33 espie 693: return gn->built_status;
694: }
695:
696:
697: static void
698: setup_engine(void)
699: {
700: static int already_setup = 0;
701:
702: if (!already_setup) {
703: setup_meta();
704: already_setup = 1;
705: }
706: }
707:
708: static bool
1.54 espie 709: do_run_command(Job *job, const char *pre)
1.10 espie 710: {
711: bool silent; /* Don't print command */
712: bool doExecute; /* Execute the command */
713: bool errCheck; /* Check errors */
1.33 espie 714: pid_t cpid; /* Child pid */
715:
716: const char *cmd = job->cmd;
1.55 espie 717: silent = Targ_Silent(job->node);
718: errCheck = !Targ_Ignore(job->node);
1.33 espie 719: if (job->node->type & OP_MAKE)
720: doExecute = true;
721: else
722: doExecute = !noExecute;
1.10 espie 723:
724: /* How can we execute a null command ? we warn the user that the
725: * command expanded to nothing (is this the right thing to do?). */
1.19 espie 726: if (*cmd == '\0') {
1.54 espie 727: Parse_Error(PARSE_WARNING,
728: "'%s' expands to '' while building %s",
729: pre, job->node->name);
1.33 espie 730: return false;
1.28 espie 731: }
1.10 espie 732:
733: for (;; cmd++) {
734: if (*cmd == '@')
735: silent = DEBUG(LOUD) ? false : true;
736: else if (*cmd == '-')
737: errCheck = false;
738: else if (*cmd == '+')
739: doExecute = true;
740: else
741: break;
742: }
1.47 espie 743: while (ISSPACE(*cmd))
1.10 espie 744: cmd++;
1.33 espie 745: /* Print the command before fork if make -n or !silent*/
746: if ( noExecute || !silent)
1.10 espie 747: printf("%s\n", cmd);
1.33 espie 748:
749: if (silent)
750: job->flags |= JOB_SILENT;
751: else
752: job->flags &= ~JOB_SILENT;
753:
1.10 espie 754: /* If we're not supposed to execute any commands, this is as far as
755: * we go... */
756: if (!doExecute)
1.33 espie 757: return false;
758: /* always flush for other stuff */
759: fflush(stdout);
1.53 espie 760:
761: /* Optimization: bypass comments entirely */
762: if (*cmd == '#')
763: return false;
1.10 espie 764:
765: /* Fork and execute the single command. If the fork fails, we abort. */
766: switch (cpid = fork()) {
767: case -1:
1.33 espie 768: Punt("Could not fork");
1.10 espie 769: /*NOTREACHED*/
770: case 0:
1.68 espie 771: reset_signal_mask();
1.34 espie 772: /* put a random delay unless we're the only job running
773: * and there's nothing left to do.
774: */
775: if (random_delay)
1.66 espie 776: if (!(runningJobs == NULL && nothing_left_to_build()))
1.46 naddy 777: usleep(arc4random_uniform(random_delay));
1.10 espie 778: run_command(cmd, errCheck);
779: /*NOTREACHED*/
780: default:
1.33 espie 781: job->pid = cpid;
782: job->next = runningJobs;
783: runningJobs = job;
784: if (errCheck)
785: job->flags |= JOB_ERRCHECK;
786: else
787: job->flags &= ~JOB_ERRCHECK;
788: debug_job_printf("Running %ld (%s) %s\n", (long)job->pid,
789: job->node->name, (noExecute || !silent) ? "" : cmd);
790: return true;
1.10 espie 791: }
792: }
793:
1.33 espie 794: bool
795: job_run_next(Job *job)
1.10 espie 796: {
1.33 espie 797: bool started;
798: GNode *gn = job->node;
1.19 espie 799:
1.33 espie 800: setup_engine();
801: while (job->next_cmd != NULL) {
802: struct command *command = Lst_Datum(job->next_cmd);
803:
804: handle_all_signals();
805: job->location = &command->location;
806: Parse_SetLocation(job->location);
1.59 espie 807: job->cmd = Var_Subst(command->string, &gn->localvars, false);
1.33 espie 808: job->next_cmd = Lst_Adv(job->next_cmd);
1.30 espie 809: if (fatal_errors)
1.33 espie 810: Punt(NULL);
1.54 espie 811: started = do_run_command(job, command->string);
1.33 espie 812: if (started)
813: return false;
814: else
815: free(job->cmd);
1.19 espie 816: }
1.33 espie 817: job->exit_type = JOB_EXIT_OKAY;
818: return true;
1.19 espie 819: }
820:
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