Annotation of src/usr.bin/make/engine.c, Revision 1.53
1.53 ! espie 1: /* $OpenBSD: engine.c,v 1.52 2017/01/29 10:04:13 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: {
1.11 espie 124: /* Alter our type to tell if errors should be ignored or things
1.21 espie 125: * should not be printed so setup_and_run_command knows what to do.
1.11 espie 126: */
127: if (Targ_Ignore(gn))
128: gn->type |= OP_IGNORE;
129: if (Targ_Silent(gn))
130: gn->type |= OP_SILENT;
131:
1.37 espie 132: if (DEBUG(DOUBLE) && (gn->type & OP_DOUBLE))
133: fprintf(stderr, "Warning: target %s had >1 lists of "
134: "shell commands (ignoring later ones)\n", gn->name);
1.34 espie 135: if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands)) {
1.36 espie 136: if (drop_silently(gn->name)) {
1.34 espie 137: printf("Warning: target %s", gn->name);
138: list_parents(gn, stdout);
1.36 espie 139: printf(" does not have any command (BUG)\n");
1.34 espie 140: return true;
141: }
1.3 espie 142: /*
143: * No commands. Look for .DEFAULT rule from which we might infer
144: * commands
145: */
1.28 espie 146: if ((gn->type & OP_NODEFAULT) == 0 &&
1.18 espie 147: (DEFAULT->type & OP_DUMMY) == 0 &&
1.9 espie 148: !Lst_IsEmpty(&DEFAULT->commands)) {
1.3 espie 149: /*
150: * Make only looks for a .DEFAULT if the node was never
151: * the target of an operator, so that's what we do too.
152: * If a .DEFAULT was given, we substitute its commands
153: * for gn's commands and set the IMPSRC variable to be
154: * the target's name The DEFAULT node acts like a
155: * transformation rule, in that gn also inherits any
156: * attributes or sources attached to .DEFAULT itself.
157: */
158: Make_HandleUse(DEFAULT, gn);
1.16 espie 159: Var(IMPSRC_INDEX, gn) = Var(TARGET_INDEX, gn);
1.3 espie 160: } else if (is_out_of_date(Dir_MTime(gn))) {
161: /*
162: * The node wasn't the target of an operator we have no
163: * .DEFAULT rule to go on and the target doesn't
164: * already exist. There's nothing more we can do for
1.28 espie 165: * this branch.
1.3 espie 166: */
1.20 espie 167: return false;
168: }
1.1 espie 169: }
1.3 espie 170: return true;
1.1 espie 171: }
172:
1.34 espie 173: static void
174: list_parents(GNode *gn, FILE *out)
175: {
176: LstNode ln;
177: bool first = true;
178:
179: for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Adv(ln)) {
180: GNode *p = Lst_Datum(ln);
181: if (!p->must_make)
182: continue;
183: if (first) {
184: fprintf(out, " (prerequisite of:");
185: first = false;
186: }
187: fprintf(out, " %s", p->name);
188: }
189: if (!first)
190: fprintf(out, ")");
191: }
192:
1.20 espie 193: void
1.33 espie 194: node_failure(GNode *gn)
1.20 espie 195: {
196: /*
197: If the -k flag wasn't given, we stop in
198: * our tracks, otherwise we just don't update this
199: * node's parents so they never get examined.
200: */
1.34 espie 201: const char *diag;
202: FILE *out;
1.20 espie 203:
204: if (gn->type & OP_OPTIONAL) {
1.34 espie 205: out = stdout;
206: diag = "(ignored)";
1.20 espie 207: } else if (keepgoing) {
1.34 espie 208: out = stdout;
209: diag = "(continuing)";
1.20 espie 210: } else {
1.34 espie 211: out = stderr;
212: diag = "";
213: }
214: fprintf(out, "make: don't know how to make %s", gn->name);
215: list_parents(gn, out);
216: fprintf(out, "%s\n", diag);
217: if (out == stdout)
218: fflush(stdout);
219: else {
1.33 espie 220: print_errors();
221: Punt(NULL);
1.20 espie 222: }
223: }
1.33 espie 224:
1.6 espie 225: /* touch files the hard way, by writing stuff to them */
226: static int
227: rewrite_time(const char *name)
228: {
229: int fd;
230: char c;
231:
232: fd = open(name, O_RDWR | O_CREAT, 0666);
233: if (fd < 0)
234: return -1;
235: /*
236: * Read and write a byte to the file to change
237: * the modification time.
238: */
239: if (read(fd, &c, 1) == 1) {
240: (void)lseek(fd, 0, SEEK_SET);
241: (void)write(fd, &c, 1);
242: }
243:
244: (void)close(fd);
245: return 0;
246: }
247:
1.1 espie 248: void
1.12 espie 249: Job_Touch(GNode *gn)
1.1 espie 250: {
1.33 espie 251: handle_all_signals();
1.26 espie 252: if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) {
1.3 espie 253: /*
1.9 espie 254: * .JOIN, .USE, and .OPTIONAL targets are "virtual" targets
255: * and, as such, shouldn't really be created.
1.26 espie 256: * Likewise, .PHONY targets are not really files
1.3 espie 257: */
258: return;
259: }
1.1 espie 260:
1.12 espie 261: if (!(gn->type & OP_SILENT)) {
1.3 espie 262: (void)fprintf(stdout, "touch %s\n", gn->name);
263: (void)fflush(stdout);
264: }
1.1 espie 265:
1.3 espie 266: if (noExecute) {
267: return;
268: }
1.1 espie 269:
1.3 espie 270: if (gn->type & OP_ARCHV) {
271: Arch_Touch(gn);
272: } else {
273: const char *file = gn->path != NULL ? gn->path : gn->name;
274:
275: if (set_times(file) == -1){
1.6 espie 276: if (rewrite_time(file) == -1) {
1.49 gsoares 277: (void)fprintf(stderr,
1.5 espie 278: "*** couldn't touch %s: %s", file,
1.3 espie 279: strerror(errno));
1.9 espie 280: }
1.1 espie 281: }
282: }
283: }
284:
285: void
1.7 espie 286: Make_TimeStamp(GNode *parent, GNode *child)
1.1 espie 287: {
1.45 espie 288: if (is_strictly_before(parent->youngest->mtime, child->mtime)) {
1.44 espie 289: parent->youngest = child;
1.42 espie 290: }
1.1 espie 291: }
292:
293: void
1.9 espie 294: Make_HandleUse(GNode *cgn, /* The .USE node */
1.1 espie 295: GNode *pgn) /* The target of the .USE node */
296: {
1.3 espie 297: GNode *gn; /* A child of the .USE node */
298: LstNode ln; /* An element in the children list */
1.1 espie 299:
1.20 espie 300:
301: assert(cgn->type & (OP_USE|OP_TRANSFORM));
1.52 espie 302:
303: if (pgn == NULL)
304: Fatal("Trying to apply .USE to '%s' without a parent",
305: cgn->name);
1.20 espie 306:
307: if ((cgn->type & OP_USE) || Lst_IsEmpty(&pgn->commands)) {
308: /* .USE or transformation and target has no commands
309: * -- append the child's commands to the parent. */
310: Lst_Concat(&pgn->commands, &cgn->commands);
311: }
312:
313: for (ln = Lst_First(&cgn->children); ln != NULL;
314: ln = Lst_Adv(ln)) {
1.51 espie 315: gn = Lst_Datum(ln);
1.20 espie 316:
317: if (Lst_AddNew(&pgn->children, gn)) {
318: Lst_AtEnd(&gn->parents, pgn);
319: pgn->unmade++;
1.3 espie 320: }
1.20 espie 321: }
1.1 espie 322:
1.37 espie 323: if (DEBUG(DOUBLE) && (cgn->type & OP_DOUBLE))
324: fprintf(stderr,
325: "Warning: .USE %s expanded in %s had >1 lists of "
326: "shell commands (ignoring later ones)\n",
327: cgn->name, pgn->name);
328: pgn->type |= cgn->type & ~(OP_OPMASK|OP_USE|OP_TRANSFORM|OP_DOUBLE);
1.1 espie 329:
1.20 espie 330: /*
331: * This child node is now "made", so we decrement the count of
332: * unmade children in the parent... We also remove the child
333: * from the parent's list to accurately reflect the number of
334: * decent children the parent has. This is used by Make_Run to
335: * decide whether to queue the parent or examine its children...
336: */
337: if (cgn->type & OP_USE)
338: pgn->unmade--;
1.1 espie 339: }
340:
1.16 espie 341: void
342: Make_DoAllVar(GNode *gn)
1.1 espie 343: {
1.16 espie 344: GNode *child;
345: LstNode ln;
346: BUFFER allsrc, oodate;
347: char *target;
348: bool do_oodate;
349: int oodate_count, allsrc_count = 0;
350:
351: oodate_count = 0;
352: allsrc_count = 0;
1.39 espie 353:
354: Var(OODATE_INDEX, gn) = "";
355: Var(ALLSRC_INDEX, gn) = "";
1.16 espie 356:
357: for (ln = Lst_First(&gn->children); ln != NULL; ln = Lst_Adv(ln)) {
1.51 espie 358: child = Lst_Datum(ln);
1.16 espie 359: if ((child->type & (OP_EXEC|OP_USE|OP_INVISIBLE)) != 0)
360: continue;
1.9 espie 361: if (OP_NOP(child->type) ||
1.16 espie 362: (target = Var(TARGET_INDEX, child)) == NULL) {
1.3 espie 363: /*
364: * this node is only source; use the specific pathname
365: * for it
366: */
1.9 espie 367: target = child->path != NULL ? child->path :
368: child->name;
1.3 espie 369: }
1.1 espie 370:
1.16 espie 371: /*
372: * It goes in the OODATE variable if the parent is younger than
373: * the child or if the child has been modified more recently
374: * than the start of the make. This is to keep make from
375: * getting confused if something else updates the parent after
376: * the make starts (shouldn't happen, I know, but sometimes it
377: * does). In such a case, if we've updated the kid, the parent
378: * is likely to have a modification time later than that of the
379: * kid and anything that relies on the OODATE variable will be
380: * hosed.
381: */
382: do_oodate = false;
383: if (gn->type & OP_JOIN) {
1.14 espie 384: if (child->built_status == MADE)
1.16 espie 385: do_oodate = true;
386: } else if (is_strictly_before(gn->mtime, child->mtime) ||
1.43 espie 387: (!is_strictly_before(child->mtime, starttime) &&
1.16 espie 388: child->built_status == MADE))
389: do_oodate = true;
390: if (do_oodate) {
391: oodate_count++;
392: if (oodate_count == 1)
393: Var(OODATE_INDEX, gn) = target;
394: else {
395: if (oodate_count == 2) {
396: Buf_Init(&oodate, 0);
1.28 espie 397: Buf_AddString(&oodate,
1.16 espie 398: Var(OODATE_INDEX, gn));
399: }
400: Buf_AddSpace(&oodate);
401: Buf_AddString(&oodate, target);
402: }
403: }
404: allsrc_count++;
405: if (allsrc_count == 1)
406: Var(ALLSRC_INDEX, gn) = target;
407: else {
408: if (allsrc_count == 2) {
409: Buf_Init(&allsrc, 0);
1.28 espie 410: Buf_AddString(&allsrc,
1.16 espie 411: Var(ALLSRC_INDEX, gn));
412: }
413: Buf_AddSpace(&allsrc);
414: Buf_AddString(&allsrc, target);
1.3 espie 415: }
1.1 espie 416: }
417:
1.16 espie 418: if (allsrc_count > 1)
419: Var(ALLSRC_INDEX, gn) = Buf_Retrieve(&allsrc);
420: if (oodate_count > 1)
421: Var(OODATE_INDEX, gn) = Buf_Retrieve(&oodate);
1.1 espie 422:
1.13 espie 423: if (gn->impliedsrc)
1.16 espie 424: Var(IMPSRC_INDEX, gn) = Var(TARGET_INDEX, gn->impliedsrc);
1.28 espie 425:
1.3 espie 426: if (gn->type & OP_JOIN)
1.16 espie 427: Var(TARGET_INDEX, gn) = Var(ALLSRC_INDEX, gn);
1.1 espie 428: }
429:
430: /* Wrapper to call Make_TimeStamp from a forEach loop. */
431: static void
1.9 espie 432: MakeTimeStamp(void *parent, void *child)
1.1 espie 433: {
1.50 espie 434: Make_TimeStamp(parent, child);
1.1 espie 435: }
436:
437: bool
1.9 espie 438: Make_OODate(GNode *gn)
1.1 espie 439: {
1.9 espie 440: bool oodate;
1.1 espie 441:
442: /*
1.3 espie 443: * Certain types of targets needn't even be sought as their datedness
444: * doesn't depend on their modification time...
1.1 espie 445: */
1.15 espie 446: if ((gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_PHONY)) == 0) {
1.3 espie 447: (void)Dir_MTime(gn);
448: if (DEBUG(MAKE)) {
1.9 espie 449: if (!is_out_of_date(gn->mtime))
1.5 espie 450: printf("modified %s...",
1.43 espie 451: time_to_string(&gn->mtime));
1.9 espie 452: else
1.3 espie 453: printf("non-existent...");
454: }
1.1 espie 455: }
456:
457: /*
1.3 espie 458: * A target is remade in one of the following circumstances:
1.9 espie 459: * - its modification time is smaller than that of its youngest child
460: * and it would actually be run (has commands or type OP_NOP)
461: * - it's the object of a force operator
462: * - it has no children, was on the lhs of an operator and doesn't
463: * exist already.
1.3 espie 464: *
1.1 espie 465: */
1.3 espie 466: if (gn->type & OP_USE) {
467: /*
468: * If the node is a USE node it is *never* out of date
469: * no matter *what*.
470: */
1.9 espie 471: if (DEBUG(MAKE))
1.3 espie 472: printf(".USE node...");
473: oodate = false;
474: } else if (gn->type & OP_JOIN) {
475: /*
476: * A target with the .JOIN attribute is only considered
477: * out-of-date if any of its children was out-of-date.
478: */
1.9 espie 479: if (DEBUG(MAKE))
1.3 espie 480: printf(".JOIN node...");
481: oodate = gn->childMade;
482: } else if (gn->type & (OP_FORCE|OP_EXEC|OP_PHONY)) {
483: /*
1.9 espie 484: * A node which is the object of the force (!) operator or which
485: * has the .EXEC attribute is always considered out-of-date.
1.3 espie 486: */
487: if (DEBUG(MAKE)) {
1.9 espie 488: if (gn->type & OP_FORCE)
1.3 espie 489: printf("! operator...");
1.9 espie 490: else if (gn->type & OP_PHONY)
1.3 espie 491: printf(".PHONY node...");
1.9 espie 492: else
1.3 espie 493: printf(".EXEC node...");
494: }
495: oodate = true;
1.45 espie 496: } else if (is_strictly_before(gn->mtime, gn->youngest->mtime) ||
497: (gn == gn->youngest &&
1.3 espie 498: (is_out_of_date(gn->mtime) || (gn->type & OP_DOUBLEDEP)))) {
499: /*
500: * A node whose modification time is less than that of its
1.45 espie 501: * youngest child or that has no children (gn->youngest == gn)
502: * and either doesn't exist (mtime == OUT_OF_DATE)
1.9 espie 503: * or was the object of a :: operator is out-of-date.
1.3 espie 504: */
505: if (DEBUG(MAKE)) {
1.45 espie 506: if (is_strictly_before(gn->mtime, gn->youngest->mtime))
1.42 espie 507: printf("modified before source(%s)...",
508: gn->youngest->name);
1.9 espie 509: else if (is_out_of_date(gn->mtime))
1.3 espie 510: printf("non-existent and no sources...");
1.9 espie 511: else
1.3 espie 512: printf(":: operator and no sources...");
513: }
514: oodate = true;
515: } else {
516: oodate = false;
517: }
1.1 espie 518:
1.3 espie 519: /*
520: * If the target isn't out-of-date, the parents need to know its
521: * modification time. Note that targets that appear to be out-of-date
522: * but aren't, because they have no commands and aren't of type OP_NOP,
523: * have their mtime stay below their children's mtime to keep parents
524: * from thinking they're out-of-date.
525: */
526: if (!oodate)
527: Lst_ForEach(&gn->parents, MakeTimeStamp, gn);
1.1 espie 528:
1.3 espie 529: return oodate;
1.1 espie 530: }
531:
1.10 espie 532: /* The following array is used to make a fast determination of which
533: * characters are interpreted specially by the shell. If a command
534: * contains any of these characters, it is executed by the shell, not
535: * directly by us. */
536: static char meta[256];
537:
538: void
539: setup_meta(void)
540: {
541: char *p;
542:
1.48 espie 543: for (p = "#=|^(){};&<>*?[]:$`\\\n~"; *p != '\0'; p++)
1.10 espie 544: meta[(unsigned char) *p] = 1;
545: /* The null character serves as a sentinel in the string. */
546: meta[0] = 1;
547: }
548:
549: static char **
550: recheck_command_for_shell(char **av)
551: {
552: char *runsh[] = {
1.32 espie 553: "!", "alias", "cd", "eval", "exit", "read", "set", "ulimit",
1.10 espie 554: "unalias", "unset", "wait", "umask", NULL
555: };
556:
557: char **p;
558:
559: /* optimization: if exec cmd, we avoid the intermediate shell */
560: if (strcmp(av[0], "exec") == 0)
561: av++;
562:
563: for (p = runsh; *p; p++)
564: if (strcmp(av[0], *p) == 0)
565: return NULL;
566:
567: return av;
568: }
569:
1.40 espie 570: static void
1.10 espie 571: run_command(const char *cmd, bool errCheck)
572: {
573: const char *p;
574: char *shargv[4];
575: char **todo;
576:
577: shargv[0] = _PATH_BSHELL;
578:
579: shargv[1] = errCheck ? "-ec" : "-c";
580: shargv[2] = (char *)cmd;
581: shargv[3] = NULL;
582:
583: todo = shargv;
584:
585:
586: /* Search for meta characters in the command. If there are no meta
587: * characters, there's no need to execute a shell to execute the
588: * command. */
589: for (p = cmd; !meta[(unsigned char)*p]; p++)
590: continue;
591: if (*p == '\0') {
592: char *bp;
593: char **av;
594: int argc;
595: /* No meta-characters, so probably no need to exec a shell.
596: * Break the command into words to form an argument vector
597: * we can execute. */
598: av = brk_string(cmd, &argc, &bp);
599: av = recheck_command_for_shell(av);
600: if (av != NULL)
601: todo = av;
602: }
603: execvp(todo[0], todo);
604:
605: if (errno == ENOENT)
606: fprintf(stderr, "%s: not found\n", todo[0]);
607: else
608: perror(todo[0]);
609: _exit(1);
610: }
611:
1.33 espie 612: static Job myjob;
613:
614: void
615: job_attach_node(Job *job, GNode *node)
616: {
617: job->node = node;
1.34 espie 618: job->node->built_status = BUILDING;
1.33 espie 619: job->next_cmd = Lst_First(&node->commands);
620: job->exit_type = JOB_EXIT_OKAY;
621: job->location = NULL;
622: job->flags = 0;
623: }
624:
625: void
626: job_handle_status(Job *job, int status)
627: {
1.36 espie 628: bool silent;
1.38 espie 629: int dying;
1.36 espie 630:
631: /* if there's one job running and we don't keep going, no need
632: * to report right now.
633: */
634: if ((job->flags & JOB_ERRCHECK) && !keepgoing && runningJobs == NULL)
635: silent = !DEBUG(JOB);
636: else
637: silent = false;
638:
1.33 espie 639: debug_job_printf("Process %ld (%s) exited with status %d.\n",
640: (long)job->pid, job->node->name, status);
641:
642: /* classify status */
643: if (WIFEXITED(status)) {
644: job->code = WEXITSTATUS(status);/* exited */
1.38 espie 645: if (job->code != 0) {
646: /* if we're already dying from that signal, be silent */
647: if (!silent && job->code > 128
648: && job->code <= 128 + _NSIG) {
649: dying = check_dying_signal();
650: silent = dying && job->code == dying + 128;
651: }
1.36 espie 652: if (!silent)
653: printf("*** Error %d", job->code);
1.33 espie 654: job->exit_type = JOB_EXIT_BAD;
655: } else
656: job->exit_type = JOB_EXIT_OKAY;
657: } else {
658: job->exit_type = JOB_SIGNALED;
659: job->code = WTERMSIG(status); /* signaled */
1.38 espie 660: /* if we're already dying from that signal, be silent */
661: if (!silent) {
662: dying = check_dying_signal();
663: silent = dying && job->code == dying;
664: }
1.36 espie 665: if (!silent)
666: printf("*** Signal %d", job->code);
1.33 espie 667: }
668:
669: /* if there is a problem, what's going on ? */
670: if (job->exit_type != JOB_EXIT_OKAY) {
1.36 espie 671: if (!silent)
672: printf(" in target '%s'", job->node->name);
1.33 espie 673: if (job->flags & JOB_ERRCHECK) {
674: job->node->built_status = ERROR;
675: /* compute expensive status if we really want it */
676: if ((job->flags & JOB_SILENT) && job == &myjob)
677: determine_expensive_job(job);
678: if (!keepgoing) {
1.36 espie 679: if (!silent)
680: printf("\n");
1.33 espie 681: job->next = errorJobs;
682: errorJobs = job;
683: /* XXX don't free the command */
684: return;
685: }
686: printf(", line %lu of %s", job->location->lineno,
687: job->location->fname);
688: if ((job->flags & (JOB_SILENT | JOB_IS_EXPENSIVE))
689: == JOB_SILENT)
690: printf(": %s", job->cmd);
691: /* Abort the current target,
692: * but let others continue. */
693: printf(" (continuing)\n");
694: } else {
695: /* Continue executing commands for
696: * this target. If we return 0,
697: * this will happen... */
698: printf(" (ignored)\n");
699: job->exit_type = JOB_EXIT_OKAY;
700: }
701: }
702: free(job->cmd);
703: }
704:
705: int
706: run_gnode(GNode *gn)
707: {
708: if (!gn || (gn->type & OP_DUMMY))
709: return NOSUCHNODE;
710:
711: gn->built_status = MADE;
712:
713: job_attach_node(&myjob, gn);
714: while (myjob.exit_type == JOB_EXIT_OKAY) {
715: bool finished = job_run_next(&myjob);
716: if (finished)
717: break;
718: handle_one_job(&myjob);
719: }
720:
721: return gn->built_status;
722: }
723:
724:
725: static void
726: setup_engine(void)
727: {
728: static int already_setup = 0;
729:
730: if (!already_setup) {
731: setup_meta();
732: already_setup = 1;
733: }
734: }
735:
736: static bool
737: do_run_command(Job *job)
1.10 espie 738: {
739: bool silent; /* Don't print command */
740: bool doExecute; /* Execute the command */
741: bool errCheck; /* Check errors */
1.33 espie 742: pid_t cpid; /* Child pid */
743:
744: const char *cmd = job->cmd;
745: silent = job->node->type & OP_SILENT;
746: errCheck = !(job->node->type & OP_IGNORE);
747: if (job->node->type & OP_MAKE)
748: doExecute = true;
749: else
750: doExecute = !noExecute;
1.10 espie 751:
752: /* How can we execute a null command ? we warn the user that the
753: * command expanded to nothing (is this the right thing to do?). */
1.19 espie 754: if (*cmd == '\0') {
1.10 espie 755: Error("%s expands to empty string", cmd);
1.33 espie 756: return false;
1.28 espie 757: }
1.10 espie 758:
759: for (;; cmd++) {
760: if (*cmd == '@')
761: silent = DEBUG(LOUD) ? false : true;
762: else if (*cmd == '-')
763: errCheck = false;
764: else if (*cmd == '+')
765: doExecute = true;
766: else
767: break;
768: }
1.47 espie 769: while (ISSPACE(*cmd))
1.10 espie 770: cmd++;
1.33 espie 771: /* Print the command before fork if make -n or !silent*/
772: if ( noExecute || !silent)
1.10 espie 773: printf("%s\n", cmd);
1.33 espie 774:
775: if (silent)
776: job->flags |= JOB_SILENT;
777: else
778: job->flags &= ~JOB_SILENT;
779:
1.10 espie 780: /* If we're not supposed to execute any commands, this is as far as
781: * we go... */
782: if (!doExecute)
1.33 espie 783: return false;
784: /* always flush for other stuff */
785: fflush(stdout);
1.53 ! espie 786:
! 787: /* Optimization: bypass comments entirely */
! 788: if (*cmd == '#')
! 789: return false;
1.10 espie 790:
791: /* Fork and execute the single command. If the fork fails, we abort. */
792: switch (cpid = fork()) {
793: case -1:
1.33 espie 794: Punt("Could not fork");
1.10 espie 795: /*NOTREACHED*/
796: case 0:
1.34 espie 797: /* put a random delay unless we're the only job running
798: * and there's nothing left to do.
799: */
800: if (random_delay)
801: if (!(runningJobs == NULL && no_jobs_left()))
1.46 naddy 802: usleep(arc4random_uniform(random_delay));
1.10 espie 803: run_command(cmd, errCheck);
804: /*NOTREACHED*/
805: default:
1.33 espie 806: job->pid = cpid;
807: job->next = runningJobs;
808: runningJobs = job;
809: if (errCheck)
810: job->flags |= JOB_ERRCHECK;
811: else
812: job->flags &= ~JOB_ERRCHECK;
813: debug_job_printf("Running %ld (%s) %s\n", (long)job->pid,
814: job->node->name, (noExecute || !silent) ? "" : cmd);
815: return true;
1.10 espie 816: }
817: }
818:
1.33 espie 819: bool
820: job_run_next(Job *job)
1.10 espie 821: {
1.33 espie 822: bool started;
823: GNode *gn = job->node;
1.19 espie 824:
1.33 espie 825: setup_engine();
826: while (job->next_cmd != NULL) {
827: struct command *command = Lst_Datum(job->next_cmd);
828:
829: handle_all_signals();
830: job->location = &command->location;
831: Parse_SetLocation(job->location);
832: job->cmd = Var_Subst(command->string, &gn->context, false);
833: job->next_cmd = Lst_Adv(job->next_cmd);
1.30 espie 834: if (fatal_errors)
1.33 espie 835: Punt(NULL);
836: started = do_run_command(job);
837: if (started)
838: return false;
839: else
840: free(job->cmd);
1.19 espie 841: }
1.33 espie 842: job->exit_type = JOB_EXIT_OKAY;
843: return true;
1.19 espie 844: }
845:
![[BACK]](/icons/back.gif){kind=icon}
Return to engine.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / make