Annotation of src/usr.bin/make/engine.c, Revision 1.41
1.41 ! espie 1: /* $OpenBSD: engine.c,v 1.40 2012/12/07 15:08:03 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: {
1.8 espie 289: if (is_strictly_before(parent->cmtime, child->mtime))
290: parent->cmtime = child->mtime;
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));
302:
303: if ((cgn->type & OP_USE) || Lst_IsEmpty(&pgn->commands)) {
304: /* .USE or transformation and target has no commands
305: * -- append the child's commands to the parent. */
306: Lst_Concat(&pgn->commands, &cgn->commands);
307: }
308:
309: for (ln = Lst_First(&cgn->children); ln != NULL;
310: ln = Lst_Adv(ln)) {
311: gn = (GNode *)Lst_Datum(ln);
312:
313: if (Lst_AddNew(&pgn->children, gn)) {
314: Lst_AtEnd(&gn->parents, pgn);
315: pgn->unmade++;
1.3 espie 316: }
1.20 espie 317: }
1.1 espie 318:
1.37 espie 319: if (DEBUG(DOUBLE) && (cgn->type & OP_DOUBLE))
320: fprintf(stderr,
321: "Warning: .USE %s expanded in %s had >1 lists of "
322: "shell commands (ignoring later ones)\n",
323: cgn->name, pgn->name);
324: pgn->type |= cgn->type & ~(OP_OPMASK|OP_USE|OP_TRANSFORM|OP_DOUBLE);
1.1 espie 325:
1.20 espie 326: /*
327: * This child node is now "made", so we decrement the count of
328: * unmade children in the parent... We also remove the child
329: * from the parent's list to accurately reflect the number of
330: * decent children the parent has. This is used by Make_Run to
331: * decide whether to queue the parent or examine its children...
332: */
333: if (cgn->type & OP_USE)
334: pgn->unmade--;
1.1 espie 335: }
336:
1.16 espie 337: void
338: Make_DoAllVar(GNode *gn)
1.1 espie 339: {
1.16 espie 340: GNode *child;
341: LstNode ln;
342: BUFFER allsrc, oodate;
343: char *target;
344: bool do_oodate;
345: int oodate_count, allsrc_count = 0;
346:
347: oodate_count = 0;
348: allsrc_count = 0;
1.39 espie 349:
350: Var(OODATE_INDEX, gn) = "";
351: Var(ALLSRC_INDEX, gn) = "";
1.16 espie 352:
353: for (ln = Lst_First(&gn->children); ln != NULL; ln = Lst_Adv(ln)) {
354: child = (GNode *)Lst_Datum(ln);
355: if ((child->type & (OP_EXEC|OP_USE|OP_INVISIBLE)) != 0)
356: continue;
1.9 espie 357: if (OP_NOP(child->type) ||
1.16 espie 358: (target = Var(TARGET_INDEX, child)) == NULL) {
1.3 espie 359: /*
360: * this node is only source; use the specific pathname
361: * for it
362: */
1.9 espie 363: target = child->path != NULL ? child->path :
364: child->name;
1.3 espie 365: }
1.1 espie 366:
1.16 espie 367: /*
368: * It goes in the OODATE variable if the parent is younger than
369: * the child or if the child has been modified more recently
370: * than the start of the make. This is to keep make from
371: * getting confused if something else updates the parent after
372: * the make starts (shouldn't happen, I know, but sometimes it
373: * does). In such a case, if we've updated the kid, the parent
374: * is likely to have a modification time later than that of the
375: * kid and anything that relies on the OODATE variable will be
376: * hosed.
377: */
378: do_oodate = false;
379: if (gn->type & OP_JOIN) {
1.14 espie 380: if (child->built_status == MADE)
1.16 espie 381: do_oodate = true;
382: } else if (is_strictly_before(gn->mtime, child->mtime) ||
1.9 espie 383: (!is_strictly_before(child->mtime, now) &&
1.16 espie 384: child->built_status == MADE))
385: do_oodate = true;
386: if (do_oodate) {
387: oodate_count++;
388: if (oodate_count == 1)
389: Var(OODATE_INDEX, gn) = target;
390: else {
391: if (oodate_count == 2) {
392: Buf_Init(&oodate, 0);
1.28 espie 393: Buf_AddString(&oodate,
1.16 espie 394: Var(OODATE_INDEX, gn));
395: }
396: Buf_AddSpace(&oodate);
397: Buf_AddString(&oodate, target);
398: }
399: }
400: allsrc_count++;
401: if (allsrc_count == 1)
402: Var(ALLSRC_INDEX, gn) = target;
403: else {
404: if (allsrc_count == 2) {
405: Buf_Init(&allsrc, 0);
1.28 espie 406: Buf_AddString(&allsrc,
1.16 espie 407: Var(ALLSRC_INDEX, gn));
408: }
409: Buf_AddSpace(&allsrc);
410: Buf_AddString(&allsrc, target);
1.3 espie 411: }
1.1 espie 412: }
413:
1.16 espie 414: if (allsrc_count > 1)
415: Var(ALLSRC_INDEX, gn) = Buf_Retrieve(&allsrc);
416: if (oodate_count > 1)
417: Var(OODATE_INDEX, gn) = Buf_Retrieve(&oodate);
1.1 espie 418:
1.13 espie 419: if (gn->impliedsrc)
1.16 espie 420: Var(IMPSRC_INDEX, gn) = Var(TARGET_INDEX, gn->impliedsrc);
1.28 espie 421:
1.3 espie 422: if (gn->type & OP_JOIN)
1.16 espie 423: Var(TARGET_INDEX, gn) = Var(ALLSRC_INDEX, gn);
1.1 espie 424: }
425:
426: /* Wrapper to call Make_TimeStamp from a forEach loop. */
427: static void
1.9 espie 428: MakeTimeStamp(void *parent, void *child)
1.1 espie 429: {
1.9 espie 430: Make_TimeStamp((GNode *)parent, (GNode *)child);
1.1 espie 431: }
432:
433: bool
1.9 espie 434: Make_OODate(GNode *gn)
1.1 espie 435: {
1.9 espie 436: bool oodate;
1.1 espie 437:
438: /*
1.3 espie 439: * Certain types of targets needn't even be sought as their datedness
440: * doesn't depend on their modification time...
1.1 espie 441: */
1.15 espie 442: if ((gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_PHONY)) == 0) {
1.3 espie 443: (void)Dir_MTime(gn);
444: if (DEBUG(MAKE)) {
1.9 espie 445: if (!is_out_of_date(gn->mtime))
1.5 espie 446: printf("modified %s...",
1.3 espie 447: time_to_string(gn->mtime));
1.9 espie 448: else
1.3 espie 449: printf("non-existent...");
450: }
1.1 espie 451: }
452:
453: /*
1.3 espie 454: * A target is remade in one of the following circumstances:
1.9 espie 455: * - its modification time is smaller than that of its youngest child
456: * and it would actually be run (has commands or type OP_NOP)
457: * - it's the object of a force operator
458: * - it has no children, was on the lhs of an operator and doesn't
459: * exist already.
1.3 espie 460: *
1.1 espie 461: */
1.3 espie 462: if (gn->type & OP_USE) {
463: /*
464: * If the node is a USE node it is *never* out of date
465: * no matter *what*.
466: */
1.9 espie 467: if (DEBUG(MAKE))
1.3 espie 468: printf(".USE node...");
469: oodate = false;
470: } else if (gn->type & OP_JOIN) {
471: /*
472: * A target with the .JOIN attribute is only considered
473: * out-of-date if any of its children was out-of-date.
474: */
1.9 espie 475: if (DEBUG(MAKE))
1.3 espie 476: printf(".JOIN node...");
477: oodate = gn->childMade;
478: } else if (gn->type & (OP_FORCE|OP_EXEC|OP_PHONY)) {
479: /*
1.9 espie 480: * A node which is the object of the force (!) operator or which
481: * has the .EXEC attribute is always considered out-of-date.
1.3 espie 482: */
483: if (DEBUG(MAKE)) {
1.9 espie 484: if (gn->type & OP_FORCE)
1.3 espie 485: printf("! operator...");
1.9 espie 486: else if (gn->type & OP_PHONY)
1.3 espie 487: printf(".PHONY node...");
1.9 espie 488: else
1.3 espie 489: printf(".EXEC node...");
490: }
491: oodate = true;
492: } else if (is_strictly_before(gn->mtime, gn->cmtime) ||
1.9 espie 493: (is_out_of_date(gn->cmtime) &&
1.3 espie 494: (is_out_of_date(gn->mtime) || (gn->type & OP_DOUBLEDEP)))) {
495: /*
496: * A node whose modification time is less than that of its
497: * youngest child or that has no children (cmtime ==
498: * OUT_OF_DATE) and either doesn't exist (mtime == OUT_OF_DATE)
1.9 espie 499: * or was the object of a :: operator is out-of-date.
1.3 espie 500: */
501: if (DEBUG(MAKE)) {
1.9 espie 502: if (is_strictly_before(gn->mtime, gn->cmtime))
1.3 espie 503: printf("modified before source...");
1.9 espie 504: else if (is_out_of_date(gn->mtime))
1.3 espie 505: printf("non-existent and no sources...");
1.9 espie 506: else
1.3 espie 507: printf(":: operator and no sources...");
508: }
509: oodate = true;
510: } else {
511: oodate = false;
512: }
1.1 espie 513:
1.3 espie 514: /*
515: * If the target isn't out-of-date, the parents need to know its
516: * modification time. Note that targets that appear to be out-of-date
517: * but aren't, because they have no commands and aren't of type OP_NOP,
518: * have their mtime stay below their children's mtime to keep parents
519: * from thinking they're out-of-date.
520: */
521: if (!oodate)
522: Lst_ForEach(&gn->parents, MakeTimeStamp, gn);
1.1 espie 523:
1.3 espie 524: return oodate;
1.1 espie 525: }
526:
1.10 espie 527: /* The following array is used to make a fast determination of which
528: * characters are interpreted specially by the shell. If a command
529: * contains any of these characters, it is executed by the shell, not
530: * directly by us. */
531: static char meta[256];
532:
533: void
534: setup_meta(void)
535: {
536: char *p;
537:
1.32 espie 538: for (p = "#=|^(){};&<>*?[]:$`\\\n"; *p != '\0'; p++)
1.10 espie 539: meta[(unsigned char) *p] = 1;
540: /* The null character serves as a sentinel in the string. */
541: meta[0] = 1;
542: }
543:
544: static char **
545: recheck_command_for_shell(char **av)
546: {
547: char *runsh[] = {
1.32 espie 548: "!", "alias", "cd", "eval", "exit", "read", "set", "ulimit",
1.10 espie 549: "unalias", "unset", "wait", "umask", NULL
550: };
551:
552: char **p;
553:
554: /* optimization: if exec cmd, we avoid the intermediate shell */
555: if (strcmp(av[0], "exec") == 0)
556: av++;
557:
558: for (p = runsh; *p; p++)
559: if (strcmp(av[0], *p) == 0)
560: return NULL;
561:
562: return av;
563: }
564:
1.40 espie 565: static void
1.10 espie 566: run_command(const char *cmd, bool errCheck)
567: {
568: const char *p;
569: char *shargv[4];
570: char **todo;
571:
572: shargv[0] = _PATH_BSHELL;
573:
574: shargv[1] = errCheck ? "-ec" : "-c";
575: shargv[2] = (char *)cmd;
576: shargv[3] = NULL;
577:
578: todo = shargv;
579:
580:
581: /* Search for meta characters in the command. If there are no meta
582: * characters, there's no need to execute a shell to execute the
583: * command. */
584: for (p = cmd; !meta[(unsigned char)*p]; p++)
585: continue;
586: if (*p == '\0') {
587: char *bp;
588: char **av;
589: int argc;
590: /* No meta-characters, so probably no need to exec a shell.
591: * Break the command into words to form an argument vector
592: * we can execute. */
593: av = brk_string(cmd, &argc, &bp);
594: av = recheck_command_for_shell(av);
595: if (av != NULL)
596: todo = av;
597: }
598: execvp(todo[0], todo);
599:
600: if (errno == ENOENT)
601: fprintf(stderr, "%s: not found\n", todo[0]);
602: else
603: perror(todo[0]);
604: _exit(1);
605: }
606:
1.33 espie 607: static Job myjob;
608:
609: void
610: job_attach_node(Job *job, GNode *node)
611: {
612: job->node = node;
1.34 espie 613: job->node->built_status = BUILDING;
1.33 espie 614: job->next_cmd = Lst_First(&node->commands);
615: job->exit_type = JOB_EXIT_OKAY;
616: job->location = NULL;
617: job->flags = 0;
618: }
619:
620: void
621: job_handle_status(Job *job, int status)
622: {
1.36 espie 623: bool silent;
1.38 espie 624: int dying;
1.36 espie 625:
626: /* if there's one job running and we don't keep going, no need
627: * to report right now.
628: */
629: if ((job->flags & JOB_ERRCHECK) && !keepgoing && runningJobs == NULL)
630: silent = !DEBUG(JOB);
631: else
632: silent = false;
633:
1.33 espie 634: debug_job_printf("Process %ld (%s) exited with status %d.\n",
635: (long)job->pid, job->node->name, status);
636:
637: /* classify status */
638: if (WIFEXITED(status)) {
639: job->code = WEXITSTATUS(status);/* exited */
1.38 espie 640: if (job->code != 0) {
641: /* if we're already dying from that signal, be silent */
642: if (!silent && job->code > 128
643: && job->code <= 128 + _NSIG) {
644: dying = check_dying_signal();
645: silent = dying && job->code == dying + 128;
646: }
1.36 espie 647: if (!silent)
648: printf("*** Error %d", job->code);
1.33 espie 649: job->exit_type = JOB_EXIT_BAD;
650: } else
651: job->exit_type = JOB_EXIT_OKAY;
652: } else {
653: job->exit_type = JOB_SIGNALED;
654: job->code = WTERMSIG(status); /* signaled */
1.38 espie 655: /* if we're already dying from that signal, be silent */
656: if (!silent) {
657: dying = check_dying_signal();
658: silent = dying && job->code == dying;
659: }
1.36 espie 660: if (!silent)
661: printf("*** Signal %d", job->code);
1.33 espie 662: }
663:
664: /* if there is a problem, what's going on ? */
665: if (job->exit_type != JOB_EXIT_OKAY) {
1.36 espie 666: if (!silent)
667: printf(" in target '%s'", job->node->name);
1.33 espie 668: if (job->flags & JOB_ERRCHECK) {
669: job->node->built_status = ERROR;
670: /* compute expensive status if we really want it */
671: if ((job->flags & JOB_SILENT) && job == &myjob)
672: determine_expensive_job(job);
673: if (!keepgoing) {
1.36 espie 674: if (!silent)
675: printf("\n");
1.33 espie 676: job->next = errorJobs;
677: errorJobs = job;
678: /* XXX don't free the command */
679: return;
680: }
681: printf(", line %lu of %s", job->location->lineno,
682: job->location->fname);
683: if ((job->flags & (JOB_SILENT | JOB_IS_EXPENSIVE))
684: == JOB_SILENT)
685: printf(": %s", job->cmd);
686: /* Abort the current target,
687: * but let others continue. */
688: printf(" (continuing)\n");
689: } else {
690: /* Continue executing commands for
691: * this target. If we return 0,
692: * this will happen... */
693: printf(" (ignored)\n");
694: job->exit_type = JOB_EXIT_OKAY;
695: }
696: }
697: free(job->cmd);
698: }
699:
700: int
701: run_gnode(GNode *gn)
702: {
703: if (!gn || (gn->type & OP_DUMMY))
704: return NOSUCHNODE;
705:
706: gn->built_status = MADE;
707:
708: job_attach_node(&myjob, gn);
709: while (myjob.exit_type == JOB_EXIT_OKAY) {
710: bool finished = job_run_next(&myjob);
711: if (finished)
712: break;
713: handle_one_job(&myjob);
714: }
715:
716: return gn->built_status;
717: }
718:
719:
720: static void
721: setup_engine(void)
722: {
723: static int already_setup = 0;
724:
725: if (!already_setup) {
726: setup_meta();
727: already_setup = 1;
728: }
729: }
730:
731: static bool
732: do_run_command(Job *job)
1.10 espie 733: {
734: bool silent; /* Don't print command */
735: bool doExecute; /* Execute the command */
736: bool errCheck; /* Check errors */
1.33 espie 737: pid_t cpid; /* Child pid */
738:
739: const char *cmd = job->cmd;
740: silent = job->node->type & OP_SILENT;
741: errCheck = !(job->node->type & OP_IGNORE);
742: if (job->node->type & OP_MAKE)
743: doExecute = true;
744: else
745: doExecute = !noExecute;
1.10 espie 746:
747: /* How can we execute a null command ? we warn the user that the
748: * command expanded to nothing (is this the right thing to do?). */
1.19 espie 749: if (*cmd == '\0') {
1.10 espie 750: Error("%s expands to empty string", cmd);
1.33 espie 751: return false;
1.28 espie 752: }
1.10 espie 753:
754: for (;; cmd++) {
755: if (*cmd == '@')
756: silent = DEBUG(LOUD) ? false : true;
757: else if (*cmd == '-')
758: errCheck = false;
759: else if (*cmd == '+')
760: doExecute = true;
761: else
762: break;
763: }
764: while (isspace(*cmd))
765: cmd++;
1.33 espie 766: /* Print the command before fork if make -n or !silent*/
767: if ( noExecute || !silent)
1.10 espie 768: printf("%s\n", cmd);
1.33 espie 769:
770: if (silent)
771: job->flags |= JOB_SILENT;
772: else
773: job->flags &= ~JOB_SILENT;
774:
1.10 espie 775: /* If we're not supposed to execute any commands, this is as far as
776: * we go... */
777: if (!doExecute)
1.33 espie 778: return false;
779: /* always flush for other stuff */
780: fflush(stdout);
1.10 espie 781:
782: /* Fork and execute the single command. If the fork fails, we abort. */
783: switch (cpid = fork()) {
784: case -1:
1.33 espie 785: Punt("Could not fork");
1.10 espie 786: /*NOTREACHED*/
787: case 0:
1.34 espie 788: /* put a random delay unless we're the only job running
789: * and there's nothing left to do.
790: */
791: if (random_delay)
792: if (!(runningJobs == NULL && no_jobs_left()))
793: usleep(random() % random_delay);
1.10 espie 794: run_command(cmd, errCheck);
795: /*NOTREACHED*/
796: default:
1.33 espie 797: job->pid = cpid;
798: job->next = runningJobs;
799: runningJobs = job;
800: if (errCheck)
801: job->flags |= JOB_ERRCHECK;
802: else
803: job->flags &= ~JOB_ERRCHECK;
804: debug_job_printf("Running %ld (%s) %s\n", (long)job->pid,
805: job->node->name, (noExecute || !silent) ? "" : cmd);
806: return true;
1.10 espie 807: }
808: }
809:
1.33 espie 810: bool
811: job_run_next(Job *job)
1.10 espie 812: {
1.33 espie 813: bool started;
814: GNode *gn = job->node;
1.19 espie 815:
1.33 espie 816: setup_engine();
817: while (job->next_cmd != NULL) {
818: struct command *command = Lst_Datum(job->next_cmd);
819:
820: handle_all_signals();
821: job->location = &command->location;
822: Parse_SetLocation(job->location);
823: job->cmd = Var_Subst(command->string, &gn->context, false);
824: job->next_cmd = Lst_Adv(job->next_cmd);
1.30 espie 825: if (fatal_errors)
1.33 espie 826: Punt(NULL);
827: started = do_run_command(job);
828: if (started)
829: return false;
830: else
831: free(job->cmd);
1.19 espie 832: }
1.33 espie 833: job->exit_type = JOB_EXIT_OKAY;
834: return true;
1.19 espie 835: }
836:
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