Annotation of src/usr.bin/make/engine.c, Revision 1.44
1.44 ! espie 1: /* $OpenBSD: engine.c,v 1.43 2013/05/22 12:14:08 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) {
1.5 espie 277: (void)fprintf(stdout,
278: "*** couldn't touch %s: %s", file,
1.3 espie 279: strerror(errno));
280: (void)fflush(stdout);
1.9 espie 281: }
1.1 espie 282: }
283: }
284: }
285:
286: void
1.7 espie 287: Make_TimeStamp(GNode *parent, GNode *child)
1.1 espie 288: {
1.44 ! espie 289: if (is_strictly_before(parent->cmtime, child->mtime)) {
! 290: parent->youngest = child;
! 291: parent->cmtime = child->mtime;
1.42 espie 292: }
1.1 espie 293: }
294:
295: void
1.9 espie 296: Make_HandleUse(GNode *cgn, /* The .USE node */
1.1 espie 297: GNode *pgn) /* The target of the .USE node */
298: {
1.3 espie 299: GNode *gn; /* A child of the .USE node */
300: LstNode ln; /* An element in the children list */
1.1 espie 301:
1.20 espie 302:
303: assert(cgn->type & (OP_USE|OP_TRANSFORM));
304:
305: if ((cgn->type & OP_USE) || Lst_IsEmpty(&pgn->commands)) {
306: /* .USE or transformation and target has no commands
307: * -- append the child's commands to the parent. */
308: Lst_Concat(&pgn->commands, &cgn->commands);
309: }
310:
311: for (ln = Lst_First(&cgn->children); ln != NULL;
312: ln = Lst_Adv(ln)) {
313: gn = (GNode *)Lst_Datum(ln);
314:
315: if (Lst_AddNew(&pgn->children, gn)) {
316: Lst_AtEnd(&gn->parents, pgn);
317: pgn->unmade++;
1.3 espie 318: }
1.20 espie 319: }
1.1 espie 320:
1.37 espie 321: if (DEBUG(DOUBLE) && (cgn->type & OP_DOUBLE))
322: fprintf(stderr,
323: "Warning: .USE %s expanded in %s had >1 lists of "
324: "shell commands (ignoring later ones)\n",
325: cgn->name, pgn->name);
326: pgn->type |= cgn->type & ~(OP_OPMASK|OP_USE|OP_TRANSFORM|OP_DOUBLE);
1.1 espie 327:
1.20 espie 328: /*
329: * This child node is now "made", so we decrement the count of
330: * unmade children in the parent... We also remove the child
331: * from the parent's list to accurately reflect the number of
332: * decent children the parent has. This is used by Make_Run to
333: * decide whether to queue the parent or examine its children...
334: */
335: if (cgn->type & OP_USE)
336: pgn->unmade--;
1.1 espie 337: }
338:
1.16 espie 339: void
340: Make_DoAllVar(GNode *gn)
1.1 espie 341: {
1.16 espie 342: GNode *child;
343: LstNode ln;
344: BUFFER allsrc, oodate;
345: char *target;
346: bool do_oodate;
347: int oodate_count, allsrc_count = 0;
348:
349: oodate_count = 0;
350: allsrc_count = 0;
1.39 espie 351:
352: Var(OODATE_INDEX, gn) = "";
353: Var(ALLSRC_INDEX, gn) = "";
1.16 espie 354:
355: for (ln = Lst_First(&gn->children); ln != NULL; ln = Lst_Adv(ln)) {
356: child = (GNode *)Lst_Datum(ln);
357: if ((child->type & (OP_EXEC|OP_USE|OP_INVISIBLE)) != 0)
358: continue;
1.9 espie 359: if (OP_NOP(child->type) ||
1.16 espie 360: (target = Var(TARGET_INDEX, child)) == NULL) {
1.3 espie 361: /*
362: * this node is only source; use the specific pathname
363: * for it
364: */
1.9 espie 365: target = child->path != NULL ? child->path :
366: child->name;
1.3 espie 367: }
1.1 espie 368:
1.16 espie 369: /*
370: * It goes in the OODATE variable if the parent is younger than
371: * the child or if the child has been modified more recently
372: * than the start of the make. This is to keep make from
373: * getting confused if something else updates the parent after
374: * the make starts (shouldn't happen, I know, but sometimes it
375: * does). In such a case, if we've updated the kid, the parent
376: * is likely to have a modification time later than that of the
377: * kid and anything that relies on the OODATE variable will be
378: * hosed.
379: */
380: do_oodate = false;
381: if (gn->type & OP_JOIN) {
1.14 espie 382: if (child->built_status == MADE)
1.16 espie 383: do_oodate = true;
384: } else if (is_strictly_before(gn->mtime, child->mtime) ||
1.43 espie 385: (!is_strictly_before(child->mtime, starttime) &&
1.16 espie 386: child->built_status == MADE))
387: do_oodate = true;
388: if (do_oodate) {
389: oodate_count++;
390: if (oodate_count == 1)
391: Var(OODATE_INDEX, gn) = target;
392: else {
393: if (oodate_count == 2) {
394: Buf_Init(&oodate, 0);
1.28 espie 395: Buf_AddString(&oodate,
1.16 espie 396: Var(OODATE_INDEX, gn));
397: }
398: Buf_AddSpace(&oodate);
399: Buf_AddString(&oodate, target);
400: }
401: }
402: allsrc_count++;
403: if (allsrc_count == 1)
404: Var(ALLSRC_INDEX, gn) = target;
405: else {
406: if (allsrc_count == 2) {
407: Buf_Init(&allsrc, 0);
1.28 espie 408: Buf_AddString(&allsrc,
1.16 espie 409: Var(ALLSRC_INDEX, gn));
410: }
411: Buf_AddSpace(&allsrc);
412: Buf_AddString(&allsrc, target);
1.3 espie 413: }
1.1 espie 414: }
415:
1.16 espie 416: if (allsrc_count > 1)
417: Var(ALLSRC_INDEX, gn) = Buf_Retrieve(&allsrc);
418: if (oodate_count > 1)
419: Var(OODATE_INDEX, gn) = Buf_Retrieve(&oodate);
1.1 espie 420:
1.13 espie 421: if (gn->impliedsrc)
1.16 espie 422: Var(IMPSRC_INDEX, gn) = Var(TARGET_INDEX, gn->impliedsrc);
1.28 espie 423:
1.3 espie 424: if (gn->type & OP_JOIN)
1.16 espie 425: Var(TARGET_INDEX, gn) = Var(ALLSRC_INDEX, gn);
1.1 espie 426: }
427:
428: /* Wrapper to call Make_TimeStamp from a forEach loop. */
429: static void
1.9 espie 430: MakeTimeStamp(void *parent, void *child)
1.1 espie 431: {
1.9 espie 432: Make_TimeStamp((GNode *)parent, (GNode *)child);
1.1 espie 433: }
434:
435: bool
1.9 espie 436: Make_OODate(GNode *gn)
1.1 espie 437: {
1.9 espie 438: bool oodate;
1.1 espie 439:
440: /*
1.3 espie 441: * Certain types of targets needn't even be sought as their datedness
442: * doesn't depend on their modification time...
1.1 espie 443: */
1.15 espie 444: if ((gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_PHONY)) == 0) {
1.3 espie 445: (void)Dir_MTime(gn);
446: if (DEBUG(MAKE)) {
1.9 espie 447: if (!is_out_of_date(gn->mtime))
1.5 espie 448: printf("modified %s...",
1.43 espie 449: time_to_string(&gn->mtime));
1.9 espie 450: else
1.3 espie 451: printf("non-existent...");
452: }
1.1 espie 453: }
454:
455: /*
1.3 espie 456: * A target is remade in one of the following circumstances:
1.9 espie 457: * - its modification time is smaller than that of its youngest child
458: * and it would actually be run (has commands or type OP_NOP)
459: * - it's the object of a force operator
460: * - it has no children, was on the lhs of an operator and doesn't
461: * exist already.
1.3 espie 462: *
1.1 espie 463: */
1.3 espie 464: if (gn->type & OP_USE) {
465: /*
466: * If the node is a USE node it is *never* out of date
467: * no matter *what*.
468: */
1.9 espie 469: if (DEBUG(MAKE))
1.3 espie 470: printf(".USE node...");
471: oodate = false;
472: } else if (gn->type & OP_JOIN) {
473: /*
474: * A target with the .JOIN attribute is only considered
475: * out-of-date if any of its children was out-of-date.
476: */
1.9 espie 477: if (DEBUG(MAKE))
1.3 espie 478: printf(".JOIN node...");
479: oodate = gn->childMade;
480: } else if (gn->type & (OP_FORCE|OP_EXEC|OP_PHONY)) {
481: /*
1.9 espie 482: * A node which is the object of the force (!) operator or which
483: * has the .EXEC attribute is always considered out-of-date.
1.3 espie 484: */
485: if (DEBUG(MAKE)) {
1.9 espie 486: if (gn->type & OP_FORCE)
1.3 espie 487: printf("! operator...");
1.9 espie 488: else if (gn->type & OP_PHONY)
1.3 espie 489: printf(".PHONY node...");
1.9 espie 490: else
1.3 espie 491: printf(".EXEC node...");
492: }
493: oodate = true;
1.44 ! espie 494: } else if (is_strictly_before(gn->mtime, gn->cmtime) ||
! 495: (is_out_of_date(gn->cmtime) &&
1.3 espie 496: (is_out_of_date(gn->mtime) || (gn->type & OP_DOUBLEDEP)))) {
497: /*
498: * A node whose modification time is less than that of its
499: * youngest child or that has no children (cmtime ==
500: * OUT_OF_DATE) and either doesn't exist (mtime == OUT_OF_DATE)
1.9 espie 501: * or was the object of a :: operator is out-of-date.
1.3 espie 502: */
503: if (DEBUG(MAKE)) {
1.44 ! espie 504: if (is_strictly_before(gn->mtime, gn->cmtime))
1.42 espie 505: printf("modified before source(%s)...",
506: gn->youngest->name);
1.9 espie 507: else if (is_out_of_date(gn->mtime))
1.3 espie 508: printf("non-existent and no sources...");
1.9 espie 509: else
1.3 espie 510: printf(":: operator and no sources...");
511: }
512: oodate = true;
513: } else {
514: oodate = false;
515: }
1.1 espie 516:
1.3 espie 517: /*
518: * If the target isn't out-of-date, the parents need to know its
519: * modification time. Note that targets that appear to be out-of-date
520: * but aren't, because they have no commands and aren't of type OP_NOP,
521: * have their mtime stay below their children's mtime to keep parents
522: * from thinking they're out-of-date.
523: */
524: if (!oodate)
525: Lst_ForEach(&gn->parents, MakeTimeStamp, gn);
1.1 espie 526:
1.3 espie 527: return oodate;
1.1 espie 528: }
529:
1.10 espie 530: /* The following array is used to make a fast determination of which
531: * characters are interpreted specially by the shell. If a command
532: * contains any of these characters, it is executed by the shell, not
533: * directly by us. */
534: static char meta[256];
535:
536: void
537: setup_meta(void)
538: {
539: char *p;
540:
1.32 espie 541: for (p = "#=|^(){};&<>*?[]:$`\\\n"; *p != '\0'; p++)
1.10 espie 542: meta[(unsigned char) *p] = 1;
543: /* The null character serves as a sentinel in the string. */
544: meta[0] = 1;
545: }
546:
547: static char **
548: recheck_command_for_shell(char **av)
549: {
550: char *runsh[] = {
1.32 espie 551: "!", "alias", "cd", "eval", "exit", "read", "set", "ulimit",
1.10 espie 552: "unalias", "unset", "wait", "umask", NULL
553: };
554:
555: char **p;
556:
557: /* optimization: if exec cmd, we avoid the intermediate shell */
558: if (strcmp(av[0], "exec") == 0)
559: av++;
560:
561: for (p = runsh; *p; p++)
562: if (strcmp(av[0], *p) == 0)
563: return NULL;
564:
565: return av;
566: }
567:
1.40 espie 568: static void
1.10 espie 569: run_command(const char *cmd, bool errCheck)
570: {
571: const char *p;
572: char *shargv[4];
573: char **todo;
574:
575: shargv[0] = _PATH_BSHELL;
576:
577: shargv[1] = errCheck ? "-ec" : "-c";
578: shargv[2] = (char *)cmd;
579: shargv[3] = NULL;
580:
581: todo = shargv;
582:
583:
584: /* Search for meta characters in the command. If there are no meta
585: * characters, there's no need to execute a shell to execute the
586: * command. */
587: for (p = cmd; !meta[(unsigned char)*p]; p++)
588: continue;
589: if (*p == '\0') {
590: char *bp;
591: char **av;
592: int argc;
593: /* No meta-characters, so probably no need to exec a shell.
594: * Break the command into words to form an argument vector
595: * we can execute. */
596: av = brk_string(cmd, &argc, &bp);
597: av = recheck_command_for_shell(av);
598: if (av != NULL)
599: todo = av;
600: }
601: execvp(todo[0], todo);
602:
603: if (errno == ENOENT)
604: fprintf(stderr, "%s: not found\n", todo[0]);
605: else
606: perror(todo[0]);
607: _exit(1);
608: }
609:
1.33 espie 610: static Job myjob;
611:
612: void
613: job_attach_node(Job *job, GNode *node)
614: {
615: job->node = node;
1.34 espie 616: job->node->built_status = BUILDING;
1.33 espie 617: job->next_cmd = Lst_First(&node->commands);
618: job->exit_type = JOB_EXIT_OKAY;
619: job->location = NULL;
620: job->flags = 0;
621: }
622:
623: void
624: job_handle_status(Job *job, int status)
625: {
1.36 espie 626: bool silent;
1.38 espie 627: int dying;
1.36 espie 628:
629: /* if there's one job running and we don't keep going, no need
630: * to report right now.
631: */
632: if ((job->flags & JOB_ERRCHECK) && !keepgoing && runningJobs == NULL)
633: silent = !DEBUG(JOB);
634: else
635: silent = false;
636:
1.33 espie 637: debug_job_printf("Process %ld (%s) exited with status %d.\n",
638: (long)job->pid, job->node->name, status);
639:
640: /* classify status */
641: if (WIFEXITED(status)) {
642: job->code = WEXITSTATUS(status);/* exited */
1.38 espie 643: if (job->code != 0) {
644: /* if we're already dying from that signal, be silent */
645: if (!silent && job->code > 128
646: && job->code <= 128 + _NSIG) {
647: dying = check_dying_signal();
648: silent = dying && job->code == dying + 128;
649: }
1.36 espie 650: if (!silent)
651: printf("*** Error %d", job->code);
1.33 espie 652: job->exit_type = JOB_EXIT_BAD;
653: } else
654: job->exit_type = JOB_EXIT_OKAY;
655: } else {
656: job->exit_type = JOB_SIGNALED;
657: job->code = WTERMSIG(status); /* signaled */
1.38 espie 658: /* if we're already dying from that signal, be silent */
659: if (!silent) {
660: dying = check_dying_signal();
661: silent = dying && job->code == dying;
662: }
1.36 espie 663: if (!silent)
664: printf("*** Signal %d", job->code);
1.33 espie 665: }
666:
667: /* if there is a problem, what's going on ? */
668: if (job->exit_type != JOB_EXIT_OKAY) {
1.36 espie 669: if (!silent)
670: printf(" in target '%s'", job->node->name);
1.33 espie 671: if (job->flags & JOB_ERRCHECK) {
672: job->node->built_status = ERROR;
673: /* compute expensive status if we really want it */
674: if ((job->flags & JOB_SILENT) && job == &myjob)
675: determine_expensive_job(job);
676: if (!keepgoing) {
1.36 espie 677: if (!silent)
678: printf("\n");
1.33 espie 679: job->next = errorJobs;
680: errorJobs = job;
681: /* XXX don't free the command */
682: return;
683: }
684: printf(", line %lu of %s", job->location->lineno,
685: job->location->fname);
686: if ((job->flags & (JOB_SILENT | JOB_IS_EXPENSIVE))
687: == JOB_SILENT)
688: printf(": %s", job->cmd);
689: /* Abort the current target,
690: * but let others continue. */
691: printf(" (continuing)\n");
692: } else {
693: /* Continue executing commands for
694: * this target. If we return 0,
695: * this will happen... */
696: printf(" (ignored)\n");
697: job->exit_type = JOB_EXIT_OKAY;
698: }
699: }
700: free(job->cmd);
701: }
702:
703: int
704: run_gnode(GNode *gn)
705: {
706: if (!gn || (gn->type & OP_DUMMY))
707: return NOSUCHNODE;
708:
709: gn->built_status = MADE;
710:
711: job_attach_node(&myjob, gn);
712: while (myjob.exit_type == JOB_EXIT_OKAY) {
713: bool finished = job_run_next(&myjob);
714: if (finished)
715: break;
716: handle_one_job(&myjob);
717: }
718:
719: return gn->built_status;
720: }
721:
722:
723: static void
724: setup_engine(void)
725: {
726: static int already_setup = 0;
727:
728: if (!already_setup) {
729: setup_meta();
730: already_setup = 1;
731: }
732: }
733:
734: static bool
735: do_run_command(Job *job)
1.10 espie 736: {
737: bool silent; /* Don't print command */
738: bool doExecute; /* Execute the command */
739: bool errCheck; /* Check errors */
1.33 espie 740: pid_t cpid; /* Child pid */
741:
742: const char *cmd = job->cmd;
743: silent = job->node->type & OP_SILENT;
744: errCheck = !(job->node->type & OP_IGNORE);
745: if (job->node->type & OP_MAKE)
746: doExecute = true;
747: else
748: doExecute = !noExecute;
1.10 espie 749:
750: /* How can we execute a null command ? we warn the user that the
751: * command expanded to nothing (is this the right thing to do?). */
1.19 espie 752: if (*cmd == '\0') {
1.10 espie 753: Error("%s expands to empty string", cmd);
1.33 espie 754: return false;
1.28 espie 755: }
1.10 espie 756:
757: for (;; cmd++) {
758: if (*cmd == '@')
759: silent = DEBUG(LOUD) ? false : true;
760: else if (*cmd == '-')
761: errCheck = false;
762: else if (*cmd == '+')
763: doExecute = true;
764: else
765: break;
766: }
767: while (isspace(*cmd))
768: cmd++;
1.33 espie 769: /* Print the command before fork if make -n or !silent*/
770: if ( noExecute || !silent)
1.10 espie 771: printf("%s\n", cmd);
1.33 espie 772:
773: if (silent)
774: job->flags |= JOB_SILENT;
775: else
776: job->flags &= ~JOB_SILENT;
777:
1.10 espie 778: /* If we're not supposed to execute any commands, this is as far as
779: * we go... */
780: if (!doExecute)
1.33 espie 781: return false;
782: /* always flush for other stuff */
783: fflush(stdout);
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()))
796: usleep(random() % 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);
830: started = do_run_command(job);
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: