1 /* $NetBSD: meta.c,v 1.41 2015/11/30 23:37:56 sjg Exp $ */
2
3 /*
4 * Implement 'meta' mode.
5 * Adapted from John Birrell's patches to FreeBSD make.
6 * --sjg
7 */
8 /*
9 * Copyright (c) 2009-2010, Juniper Networks, Inc.
10 * Portions Copyright (c) 2009, John Birrell.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33 #if defined(USE_META)
34
35 #ifdef HAVE_CONFIG_H
36 # include "config.h"
37 #endif
38 #include <sys/stat.h>
39 #include <sys/ioctl.h>
40 #include <fcntl.h>
41 #ifdef HAVE_LIBGEN_H
42 #include <libgen.h>
43 #elif !defined(HAVE_DIRNAME)
44 char * dirname(char *);
45 #endif
46 #include <errno.h>
47 #if !defined(HAVE_CONFIG_H) || defined(HAVE_ERR_H)
48 #include <err.h>
49 #endif
50
51 #include "make.h"
52 #include "job.h"
53
54 #ifdef HAVE_FILEMON_H
55 # include <filemon.h>
56 #endif
57 #if !defined(USE_FILEMON) && defined(FILEMON_SET_FD)
58 # define USE_FILEMON
59 #endif
60
61 static BuildMon Mybm; /* for compat */
62 static Lst metaBailiwick; /* our scope of control */
63 static Lst metaIgnorePaths; /* paths we deliberately ignore */
64
65 #ifndef MAKE_META_IGNORE_PATHS
66 #define MAKE_META_IGNORE_PATHS ".MAKE.META.IGNORE_PATHS"
67 #endif
68
69 Boolean useMeta = FALSE;
70 static Boolean useFilemon = FALSE;
71 static Boolean writeMeta = FALSE;
72 static Boolean metaEnv = FALSE; /* don't save env unless asked */
73 static Boolean metaVerbose = FALSE;
74 static Boolean metaIgnoreCMDs = FALSE; /* ignore CMDs in .meta files */
75 static Boolean metaCurdirOk = FALSE; /* write .meta in .CURDIR Ok? */
76 static Boolean metaSilent = FALSE; /* if we have a .meta be SILENT */
77
78 extern Boolean forceJobs;
79 extern Boolean comatMake;
80 extern char **environ;
81
82 #define MAKE_META_PREFIX ".MAKE.META.PREFIX"
83
84 #ifndef N2U
85 # define N2U(n, u) (((n) + ((u) - 1)) / (u))
86 #endif
87 #ifndef ROUNDUP
88 # define ROUNDUP(n, u) (N2U((n), (u)) * (u))
89 #endif
90
91 #if !defined(HAVE_STRSEP)
92 # define strsep(s, d) stresep((s), (d), 0)
93 #endif
94
95 /*
96 * Filemon is a kernel module which snoops certain syscalls.
97 *
98 * C chdir
99 * E exec
100 * F [v]fork
101 * L [sym]link
102 * M rename
103 * R read
104 * W write
105 * S stat
106 *
107 * See meta_oodate below - we mainly care about 'E' and 'R'.
108 *
109 * We can still use meta mode without filemon, but
110 * the benefits are more limited.
111 */
112 #ifdef USE_FILEMON
113 # ifndef _PATH_FILEMON
114 # define _PATH_FILEMON "/dev/filemon"
115 # endif
116
117 /*
118 * Open the filemon device.
119 */
120 static void
filemon_open(BuildMon * pbm)121 filemon_open(BuildMon *pbm)
122 {
123 int retry;
124
125 pbm->mon_fd = pbm->filemon_fd = -1;
126 if (!useFilemon)
127 return;
128
129 for (retry = 5; retry >= 0; retry--) {
130 if ((pbm->filemon_fd = open(_PATH_FILEMON, O_RDWR)) >= 0)
131 break;
132 }
133
134 if (pbm->filemon_fd < 0) {
135 useFilemon = FALSE;
136 warn("Could not open %s", _PATH_FILEMON);
137 return;
138 }
139
140 /*
141 * We use a file outside of '.'
142 * to avoid a FreeBSD kernel bug where unlink invalidates
143 * cwd causing getcwd to do a lot more work.
144 * We only care about the descriptor.
145 */
146 pbm->mon_fd = mkTempFile("filemon.XXXXXX", NULL);
147 if (ioctl(pbm->filemon_fd, FILEMON_SET_FD, &pbm->mon_fd) < 0) {
148 err(1, "Could not set filemon file descriptor!");
149 }
150 /* we don't need these once we exec */
151 (void)fcntl(pbm->mon_fd, F_SETFD, 1);
152 (void)fcntl(pbm->filemon_fd, F_SETFD, 1);
153 }
154
155 /*
156 * Read the build monitor output file and write records to the target's
157 * metadata file.
158 */
159 static void
filemon_read(FILE * mfp,int fd)160 filemon_read(FILE *mfp, int fd)
161 {
162 char buf[BUFSIZ];
163 int n;
164
165 /* Check if we're not writing to a meta data file.*/
166 if (mfp == NULL) {
167 if (fd >= 0)
168 close(fd); /* not interested */
169 return;
170 }
171 /* rewind */
172 (void)lseek(fd, (off_t)0, SEEK_SET);
173
174 fprintf(mfp, "\n-- filemon acquired metadata --\n");
175
176 while ((n = read(fd, buf, sizeof(buf))) > 0) {
177 fwrite(buf, 1, n, mfp);
178 }
179 fflush(mfp);
180 close(fd);
181 }
182 #endif
183
184 /*
185 * when realpath() fails,
186 * we use this, to clean up ./ and ../
187 */
188 static void
eat_dots(char * buf,size_t bufsz,int dots)189 eat_dots(char *buf, size_t bufsz, int dots)
190 {
191 char *cp;
192 char *cp2;
193 const char *eat;
194 size_t eatlen;
195
196 switch (dots) {
197 case 1:
198 eat = "/./";
199 eatlen = 2;
200 break;
201 case 2:
202 eat = "/../";
203 eatlen = 3;
204 break;
205 default:
206 return;
207 }
208
209 do {
210 cp = strstr(buf, eat);
211 if (cp) {
212 cp2 = cp + eatlen;
213 if (dots == 2 && cp > buf) {
214 do {
215 cp--;
216 } while (cp > buf && *cp != '/');
217 }
218 if (*cp == '/') {
219 strlcpy(cp, cp2, bufsz - (cp - buf));
220 } else {
221 return; /* can't happen? */
222 }
223 }
224 } while (cp);
225 }
226
227 static char *
meta_name(struct GNode * gn,char * mname,size_t mnamelen,const char * dname,const char * tname)228 meta_name(struct GNode *gn, char *mname, size_t mnamelen,
229 const char *dname,
230 const char *tname)
231 {
232 char buf[MAXPATHLEN];
233 char cwd[MAXPATHLEN];
234 char *rp;
235 char *cp;
236 char *tp;
237 char *p[4]; /* >= number of possible uses */
238 int i;
239
240 i = 0;
241 if (!dname)
242 dname = Var_Value(".OBJDIR", gn, &p[i++]);
243 if (!tname)
244 tname = Var_Value(TARGET, gn, &p[i++]);
245
246 if (realpath(dname, cwd))
247 dname = cwd;
248
249 /*
250 * Weed out relative paths from the target file name.
251 * We have to be careful though since if target is a
252 * symlink, the result will be unstable.
253 * So we use realpath() just to get the dirname, and leave the
254 * basename as given to us.
255 */
256 if ((cp = strrchr(tname, '/'))) {
257 if (realpath(tname, buf)) {
258 if ((rp = strrchr(buf, '/'))) {
259 rp++;
260 cp++;
261 if (strcmp(cp, rp) != 0)
262 strlcpy(rp, cp, sizeof(buf) - (rp - buf));
263 }
264 tname = buf;
265 } else {
266 /*
267 * We likely have a directory which is about to be made.
268 * We pretend realpath() succeeded, to have a chance
269 * of generating the same meta file name that we will
270 * next time through.
271 */
272 if (tname[0] == '/') {
273 strlcpy(buf, tname, sizeof(buf));
274 } else {
275 snprintf(buf, sizeof(buf), "%s/%s", cwd, tname);
276 }
277 eat_dots(buf, sizeof(buf), 1); /* ./ */
278 eat_dots(buf, sizeof(buf), 2); /* ../ */
279 tname = buf;
280 }
281 }
282 /* on some systems dirname may modify its arg */
283 tp = bmake_strdup(tname);
284 if (strcmp(dname, dirname(tp)) == 0)
285 snprintf(mname, mnamelen, "%s.meta", tname);
286 else {
287 snprintf(mname, mnamelen, "%s/%s.meta", dname, tname);
288
289 /*
290 * Replace path separators in the file name after the
291 * current object directory path.
292 */
293 cp = mname + strlen(dname) + 1;
294
295 while (*cp != '\0') {
296 if (*cp == '/')
297 *cp = '_';
298 cp++;
299 }
300 }
301 free(tp);
302 for (i--; i >= 0; i--) {
303 if (p[i])
304 free(p[i]);
305 }
306 return (mname);
307 }
308
309 /*
310 * Return true if running ${.MAKE}
311 * Bypassed if target is flagged .MAKE
312 */
313 static int
is_submake(void * cmdp,void * gnp)314 is_submake(void *cmdp, void *gnp)
315 {
316 static char *p_make = NULL;
317 static int p_len;
318 char *cmd = cmdp;
319 GNode *gn = gnp;
320 char *mp = NULL;
321 char *cp;
322 char *cp2;
323 int rc = 0; /* keep looking */
324
325 if (!p_make) {
326 p_make = Var_Value(".MAKE", gn, &cp);
327 p_len = strlen(p_make);
328 }
329 cp = strchr(cmd, '$');
330 if ((cp)) {
331 mp = Var_Subst(NULL, cmd, gn, FALSE, TRUE);
332 cmd = mp;
333 }
334 cp2 = strstr(cmd, p_make);
335 if ((cp2)) {
336 switch (cp2[p_len]) {
337 case '\0':
338 case ' ':
339 case '\t':
340 case '\n':
341 rc = 1;
342 break;
343 }
344 if (cp2 > cmd && rc > 0) {
345 switch (cp2[-1]) {
346 case ' ':
347 case '\t':
348 case '\n':
349 break;
350 default:
351 rc = 0; /* no match */
352 break;
353 }
354 }
355 }
356 if (mp)
357 free(mp);
358 return (rc);
359 }
360
361 typedef struct meta_file_s {
362 FILE *fp;
363 GNode *gn;
364 } meta_file_t;
365
366 static int
printCMD(void * cmdp,void * mfpp)367 printCMD(void *cmdp, void *mfpp)
368 {
369 meta_file_t *mfp = mfpp;
370 char *cmd = cmdp;
371 char *cp = NULL;
372
373 if (strchr(cmd, '$')) {
374 cmd = cp = Var_Subst(NULL, cmd, mfp->gn, FALSE, TRUE);
375 }
376 fprintf(mfp->fp, "CMD %s\n", cmd);
377 if (cp)
378 free(cp);
379 return 0;
380 }
381
382 /*
383 * Certain node types never get a .meta file
384 */
385 #define SKIP_META_TYPE(_type) do { \
386 if ((gn->type & __CONCAT(OP_, _type))) { \
387 if (DEBUG(META)) { \
388 fprintf(debug_file, "Skipping meta for %s: .%s\n", \
389 gn->name, __STRING(_type)); \
390 } \
391 return (NULL); \
392 } \
393 } while (0)
394
395 static FILE *
meta_create(BuildMon * pbm,GNode * gn)396 meta_create(BuildMon *pbm, GNode *gn)
397 {
398 meta_file_t mf;
399 char buf[MAXPATHLEN];
400 char objdir[MAXPATHLEN];
401 char **ptr;
402 const char *dname;
403 const char *tname;
404 char *fname;
405 const char *cp;
406 char *p[4]; /* >= possible uses */
407 int i;
408 struct stat fs;
409
410
411 /* This may be a phony node which we don't want meta data for... */
412 /* Skip .meta for .BEGIN, .END, .ERROR etc as well. */
413 /* Or it may be explicitly flagged as .NOMETA */
414 SKIP_META_TYPE(NOMETA);
415 /* Unless it is explicitly flagged as .META */
416 if (!(gn->type & OP_META)) {
417 SKIP_META_TYPE(PHONY);
418 SKIP_META_TYPE(SPECIAL);
419 SKIP_META_TYPE(MAKE);
420 }
421
422 mf.fp = NULL;
423
424 i = 0;
425
426 dname = Var_Value(".OBJDIR", gn, &p[i++]);
427 tname = Var_Value(TARGET, gn, &p[i++]);
428
429 /* The object directory may not exist. Check it.. */
430 if (stat(dname, &fs) != 0) {
431 if (DEBUG(META))
432 fprintf(debug_file, "Skipping meta for %s: no .OBJDIR\n",
433 gn->name);
434 goto out;
435 }
436 /* Check if there are no commands to execute. */
437 if (Lst_IsEmpty(gn->commands)) {
438 if (DEBUG(META))
439 fprintf(debug_file, "Skipping meta for %s: no commands\n",
440 gn->name);
441 goto out;
442 }
443
444 /* make sure these are canonical */
445 if (realpath(dname, objdir))
446 dname = objdir;
447
448 /* If we aren't in the object directory, don't create a meta file. */
449 if (!metaCurdirOk && strcmp(curdir, dname) == 0) {
450 if (DEBUG(META))
451 fprintf(debug_file, "Skipping meta for %s: .OBJDIR == .CURDIR\n",
452 gn->name);
453 goto out;
454 }
455 if (!(gn->type & OP_META)) {
456 /* We do not generate .meta files for sub-makes */
457 if (Lst_ForEach(gn->commands, is_submake, gn)) {
458 if (DEBUG(META))
459 fprintf(debug_file, "Skipping meta for %s: .MAKE\n",
460 gn->name);
461 goto out;
462 }
463 }
464
465 if (metaVerbose) {
466 char *mp;
467
468 /* Describe the target we are building */
469 mp = Var_Subst(NULL, "${" MAKE_META_PREFIX "}", gn, FALSE, TRUE);
470 if (*mp)
471 fprintf(stdout, "%s\n", mp);
472 free(mp);
473 }
474 /* Get the basename of the target */
475 if ((cp = strrchr(tname, '/')) == NULL) {
476 cp = tname;
477 } else {
478 cp++;
479 }
480
481 fflush(stdout);
482
483 if (strcmp(cp, makeDependfile) == 0)
484 goto out;
485
486 if (!writeMeta)
487 /* Don't create meta data. */
488 goto out;
489
490 fname = meta_name(gn, pbm->meta_fname, sizeof(pbm->meta_fname),
491 dname, tname);
492
493 #ifdef DEBUG_META_MODE
494 if (DEBUG(META))
495 fprintf(debug_file, "meta_create: %s\n", fname);
496 #endif
497
498 if ((mf.fp = fopen(fname, "w")) == NULL)
499 err(1, "Could not open meta file '%s'", fname);
500
501 fprintf(mf.fp, "# Meta data file %s\n", fname);
502
503 mf.gn = gn;
504
505 Lst_ForEach(gn->commands, printCMD, &mf);
506
507 fprintf(mf.fp, "CWD %s\n", getcwd(buf, sizeof(buf)));
508 fprintf(mf.fp, "TARGET %s\n", tname);
509
510 if (metaEnv) {
511 for (ptr = environ; *ptr != NULL; ptr++)
512 fprintf(mf.fp, "ENV %s\n", *ptr);
513 }
514
515 fprintf(mf.fp, "-- command output --\n");
516 fflush(mf.fp);
517
518 Var_Append(".MAKE.META.FILES", fname, VAR_GLOBAL);
519 Var_Append(".MAKE.META.CREATED", fname, VAR_GLOBAL);
520
521 gn->type |= OP_META; /* in case anyone wants to know */
522 if (metaSilent) {
523 gn->type |= OP_SILENT;
524 }
525 out:
526 for (i--; i >= 0; i--) {
527 if (p[i])
528 free(p[i]);
529 }
530
531 return (mf.fp);
532 }
533
534 static Boolean
boolValue(char * s)535 boolValue(char *s)
536 {
537 switch(*s) {
538 case '0':
539 case 'N':
540 case 'n':
541 case 'F':
542 case 'f':
543 return FALSE;
544 }
545 return TRUE;
546 }
547
548 /*
549 * Initialization we need before reading makefiles.
550 */
551 void
meta_init(void)552 meta_init(void)
553 {
554 #ifdef USE_FILEMON
555 /* this allows makefiles to test if we have filemon support */
556 Var_Set(".MAKE.PATH_FILEMON", _PATH_FILEMON, VAR_GLOBAL, 0);
557 #endif
558 }
559
560
561 /*
562 * Initialization we need after reading makefiles.
563 */
564 void
meta_mode_init(const char * make_mode)565 meta_mode_init(const char *make_mode)
566 {
567 static int once = 0;
568 char *cp;
569
570 useMeta = TRUE;
571 useFilemon = TRUE;
572 writeMeta = TRUE;
573
574 if (make_mode) {
575 if (strstr(make_mode, "env"))
576 metaEnv = TRUE;
577 if (strstr(make_mode, "verb"))
578 metaVerbose = TRUE;
579 if (strstr(make_mode, "read"))
580 writeMeta = FALSE;
581 if (strstr(make_mode, "nofilemon"))
582 useFilemon = FALSE;
583 if ((cp = strstr(make_mode, "curdirok="))) {
584 metaCurdirOk = boolValue(&cp[9]);
585 }
586 if ((cp = strstr(make_mode, "silent="))) {
587 metaSilent = boolValue(&cp[7]);
588 }
589 if (strstr(make_mode, "ignore-cmd"))
590 metaIgnoreCMDs = TRUE;
591 /* for backwards compatability */
592 Var_Set(".MAKE.META_CREATED", "${.MAKE.META.CREATED}", VAR_GLOBAL, 0);
593 Var_Set(".MAKE.META_FILES", "${.MAKE.META.FILES}", VAR_GLOBAL, 0);
594 }
595 if (metaVerbose && !Var_Exists(MAKE_META_PREFIX, VAR_GLOBAL)) {
596 /*
597 * The default value for MAKE_META_PREFIX
598 * prints the absolute path of the target.
599 * This works be cause :H will generate '.' if there is no /
600 * and :tA will resolve that to cwd.
601 */
602 Var_Set(MAKE_META_PREFIX, "Building ${.TARGET:H:tA}/${.TARGET:T}", VAR_GLOBAL, 0);
603 }
604 if (once)
605 return;
606 once = 1;
607 memset(&Mybm, 0, sizeof(Mybm));
608 /*
609 * We consider ourselves master of all within ${.MAKE.META.BAILIWICK}
610 */
611 metaBailiwick = Lst_Init(FALSE);
612 cp = Var_Subst(NULL, "${.MAKE.META.BAILIWICK:O:u:tA}", VAR_GLOBAL,
613 FALSE, TRUE);
614 if (cp) {
615 str2Lst_Append(metaBailiwick, cp, NULL);
616 }
617 /*
618 * We ignore any paths that start with ${.MAKE.META.IGNORE_PATHS}
619 */
620 metaIgnorePaths = Lst_Init(FALSE);
621 Var_Append(MAKE_META_IGNORE_PATHS,
622 "/dev /etc /proc /tmp /var/run /var/tmp ${TMPDIR}", VAR_GLOBAL);
623 cp = Var_Subst(NULL,
624 "${" MAKE_META_IGNORE_PATHS ":O:u:tA}", VAR_GLOBAL,
625 FALSE, TRUE);
626 if (cp) {
627 str2Lst_Append(metaIgnorePaths, cp, NULL);
628 }
629 }
630
631 /*
632 * In each case below we allow for job==NULL
633 */
634 void
meta_job_start(Job * job,GNode * gn)635 meta_job_start(Job *job, GNode *gn)
636 {
637 BuildMon *pbm;
638
639 if (job != NULL) {
640 pbm = &job->bm;
641 } else {
642 pbm = &Mybm;
643 }
644 pbm->mfp = meta_create(pbm, gn);
645 #ifdef USE_FILEMON_ONCE
646 /* compat mode we open the filemon dev once per command */
647 if (job == NULL)
648 return;
649 #endif
650 #ifdef USE_FILEMON
651 if (pbm->mfp != NULL && useFilemon) {
652 filemon_open(pbm);
653 } else {
654 pbm->mon_fd = pbm->filemon_fd = -1;
655 }
656 #endif
657 }
658
659 /*
660 * The child calls this before doing anything.
661 * It does not disturb our state.
662 */
663 void
meta_job_child(Job * job)664 meta_job_child(Job *job)
665 {
666 #ifdef USE_FILEMON
667 BuildMon *pbm;
668
669 if (job != NULL) {
670 pbm = &job->bm;
671 } else {
672 pbm = &Mybm;
673 }
674 if (pbm->mfp != NULL) {
675 close(fileno(pbm->mfp));
676 if (useFilemon) {
677 pid_t pid;
678
679 pid = getpid();
680 if (ioctl(pbm->filemon_fd, FILEMON_SET_PID, &pid) < 0) {
681 err(1, "Could not set filemon pid!");
682 }
683 }
684 }
685 #endif
686 }
687
688 void
meta_job_error(Job * job,GNode * gn,int flags,int status)689 meta_job_error(Job *job, GNode *gn, int flags, int status)
690 {
691 char cwd[MAXPATHLEN];
692 BuildMon *pbm;
693
694 if (job != NULL) {
695 pbm = &job->bm;
696 } else {
697 if (!gn)
698 gn = job->node;
699 pbm = &Mybm;
700 }
701 if (pbm->mfp != NULL) {
702 fprintf(pbm->mfp, "*** Error code %d%s\n",
703 status,
704 (flags & JOB_IGNERR) ?
705 "(ignored)" : "");
706 }
707 if (gn) {
708 Var_Set(".ERROR_TARGET", gn->path ? gn->path : gn->name, VAR_GLOBAL, 0);
709 }
710 getcwd(cwd, sizeof(cwd));
711 Var_Set(".ERROR_CWD", cwd, VAR_GLOBAL, 0);
712 if (pbm && pbm->meta_fname[0]) {
713 Var_Set(".ERROR_META_FILE", pbm->meta_fname, VAR_GLOBAL, 0);
714 }
715 meta_job_finish(job);
716 }
717
718 void
meta_job_output(Job * job,char * cp,const char * nl)719 meta_job_output(Job *job, char *cp, const char *nl)
720 {
721 BuildMon *pbm;
722
723 if (job != NULL) {
724 pbm = &job->bm;
725 } else {
726 pbm = &Mybm;
727 }
728 if (pbm->mfp != NULL) {
729 if (metaVerbose) {
730 static char *meta_prefix = NULL;
731 static int meta_prefix_len;
732
733 if (!meta_prefix) {
734 char *cp2;
735
736 meta_prefix = Var_Subst(NULL, "${" MAKE_META_PREFIX "}",
737 VAR_GLOBAL, FALSE, TRUE);
738 if ((cp2 = strchr(meta_prefix, '$')))
739 meta_prefix_len = cp2 - meta_prefix;
740 else
741 meta_prefix_len = strlen(meta_prefix);
742 }
743 if (strncmp(cp, meta_prefix, meta_prefix_len) == 0) {
744 cp = strchr(cp+1, '\n');
745 if (!cp++)
746 return;
747 }
748 }
749 fprintf(pbm->mfp, "%s%s", cp, nl);
750 }
751 }
752
753 void
meta_cmd_finish(void * pbmp)754 meta_cmd_finish(void *pbmp)
755 {
756 #ifdef USE_FILEMON
757 BuildMon *pbm = pbmp;
758
759 if (!pbm)
760 pbm = &Mybm;
761
762 if (pbm->filemon_fd >= 0) {
763 close(pbm->filemon_fd);
764 filemon_read(pbm->mfp, pbm->mon_fd);
765 pbm->filemon_fd = pbm->mon_fd = -1;
766 }
767 #endif
768 }
769
770 void
meta_job_finish(Job * job)771 meta_job_finish(Job *job)
772 {
773 BuildMon *pbm;
774
775 if (job != NULL) {
776 pbm = &job->bm;
777 } else {
778 pbm = &Mybm;
779 }
780 if (pbm->mfp != NULL) {
781 meta_cmd_finish(pbm);
782 fclose(pbm->mfp);
783 pbm->mfp = NULL;
784 pbm->meta_fname[0] = '\0';
785 }
786 }
787
788 /*
789 * Fetch a full line from fp - growing bufp if needed
790 * Return length in bufp.
791 */
792 static int
fgetLine(char ** bufp,size_t * szp,int o,FILE * fp)793 fgetLine(char **bufp, size_t *szp, int o, FILE *fp)
794 {
795 char *buf = *bufp;
796 size_t bufsz = *szp;
797 struct stat fs;
798 int x;
799
800 if (fgets(&buf[o], bufsz - o, fp) != NULL) {
801 check_newline:
802 x = o + strlen(&buf[o]);
803 if (buf[x - 1] == '\n')
804 return x;
805 /*
806 * We need to grow the buffer.
807 * The meta file can give us a clue.
808 */
809 if (fstat(fileno(fp), &fs) == 0) {
810 size_t newsz;
811 char *p;
812
813 newsz = ROUNDUP((fs.st_size / 2), BUFSIZ);
814 if (newsz <= bufsz)
815 newsz = ROUNDUP(fs.st_size, BUFSIZ);
816 if (DEBUG(META))
817 fprintf(debug_file, "growing buffer %u -> %u\n",
818 (unsigned)bufsz, (unsigned)newsz);
819 p = bmake_realloc(buf, newsz);
820 if (p) {
821 *bufp = buf = p;
822 *szp = bufsz = newsz;
823 /* fetch the rest */
824 if (!fgets(&buf[x], bufsz - x, fp))
825 return x; /* truncated! */
826 goto check_newline;
827 }
828 }
829 }
830 return 0;
831 }
832
833 static int
prefix_match(void * p,void * q)834 prefix_match(void *p, void *q)
835 {
836 const char *prefix = p;
837 const char *path = q;
838 size_t n = strlen(prefix);
839
840 return (0 == strncmp(path, prefix, n));
841 }
842
843 static int
string_match(const void * p,const void * q)844 string_match(const void *p, const void *q)
845 {
846 const char *p1 = p;
847 const char *p2 = q;
848
849 return strcmp(p1, p2);
850 }
851
852
853 /*
854 * When running with 'meta' functionality, a target can be out-of-date
855 * if any of the references in its meta data file is more recent.
856 * We have to track the latestdir on a per-process basis.
857 */
858 #define LCWD_VNAME_FMT ".meta.%d.lcwd"
859 #define LDIR_VNAME_FMT ".meta.%d.ldir"
860
861 /*
862 * It is possible that a .meta file is corrupted,
863 * if we detect this we want to reproduce it.
864 * Setting oodate TRUE will have that effect.
865 */
866 #define CHECK_VALID_META(p) if (!(p && *p)) { \
867 warnx("%s: %d: malformed", fname, lineno); \
868 oodate = TRUE; \
869 continue; \
870 }
871
872 #define DEQUOTE(p) if (*p == '\'') { \
873 char *ep; \
874 p++; \
875 if ((ep = strchr(p, '\''))) \
876 *ep = '\0'; \
877 }
878
879 Boolean
meta_oodate(GNode * gn,Boolean oodate)880 meta_oodate(GNode *gn, Boolean oodate)
881 {
882 static char *tmpdir = NULL;
883 static char cwd[MAXPATHLEN];
884 char lcwd_vname[64];
885 char ldir_vname[64];
886 char lcwd[MAXPATHLEN];
887 char latestdir[MAXPATHLEN];
888 char fname[MAXPATHLEN];
889 char fname1[MAXPATHLEN];
890 char fname2[MAXPATHLEN];
891 char fname3[MAXPATHLEN];
892 char *p;
893 char *cp;
894 char *link_src;
895 char *move_target;
896 static size_t cwdlen = 0;
897 static size_t tmplen = 0;
898 FILE *fp;
899 Boolean needOODATE = FALSE;
900 Lst missingFiles;
901
902 if (oodate)
903 return oodate; /* we're done */
904
905 missingFiles = Lst_Init(FALSE);
906
907 /*
908 * We need to check if the target is out-of-date. This includes
909 * checking if the expanded command has changed. This in turn
910 * requires that all variables are set in the same way that they
911 * would be if the target needs to be re-built.
912 */
913 Make_DoAllVar(gn);
914
915 meta_name(gn, fname, sizeof(fname), NULL, NULL);
916
917 #ifdef DEBUG_META_MODE
918 if (DEBUG(META))
919 fprintf(debug_file, "meta_oodate: %s\n", fname);
920 #endif
921
922 if ((fp = fopen(fname, "r")) != NULL) {
923 static char *buf = NULL;
924 static size_t bufsz;
925 int lineno = 0;
926 int lastpid = 0;
927 int pid;
928 int f = 0;
929 int x;
930 LstNode ln;
931 struct stat fs;
932
933 if (!buf) {
934 bufsz = 8 * BUFSIZ;
935 buf = bmake_malloc(bufsz);
936 }
937
938 if (!cwdlen) {
939 if (getcwd(cwd, sizeof(cwd)) == NULL)
940 err(1, "Could not get current working directory");
941 cwdlen = strlen(cwd);
942 }
943 strlcpy(lcwd, cwd, sizeof(lcwd));
944 strlcpy(latestdir, cwd, sizeof(latestdir));
945
946 if (!tmpdir) {
947 tmpdir = getTmpdir();
948 tmplen = strlen(tmpdir);
949 }
950
951 /* we want to track all the .meta we read */
952 Var_Append(".MAKE.META.FILES", fname, VAR_GLOBAL);
953
954 ln = Lst_First(gn->commands);
955 while (!oodate && (x = fgetLine(&buf, &bufsz, 0, fp)) > 0) {
956 lineno++;
957 if (buf[x - 1] == '\n')
958 buf[x - 1] = '\0';
959 else {
960 warnx("%s: %d: line truncated at %u", fname, lineno, x);
961 oodate = TRUE;
962 break;
963 }
964 link_src = NULL;
965 move_target = NULL;
966 /* Find the start of the build monitor section. */
967 if (!f) {
968 if (strncmp(buf, "-- filemon", 10) == 0) {
969 f = 1;
970 continue;
971 }
972 if (strncmp(buf, "# buildmon", 10) == 0) {
973 f = 1;
974 continue;
975 }
976 }
977
978 /* Delimit the record type. */
979 p = buf;
980 #ifdef DEBUG_META_MODE
981 if (DEBUG(META))
982 fprintf(debug_file, "%s: %d: %s\n", fname, lineno, buf);
983 #endif
984 strsep(&p, " ");
985 if (f) {
986 /*
987 * We are in the 'filemon' output section.
988 * Each record from filemon follows the general form:
989 *
990 * <key> <pid> <data>
991 *
992 * Where:
993 * <key> is a single letter, denoting the syscall.
994 * <pid> is the process that made the syscall.
995 * <data> is the arguments (of interest).
996 */
997 switch(buf[0]) {
998 case '#': /* comment */
999 case 'V': /* version */
1000 break;
1001 default:
1002 /*
1003 * We need to track pathnames per-process.
1004 *
1005 * Each process run by make, starts off in the 'CWD'
1006 * recorded in the .meta file, if it chdirs ('C')
1007 * elsewhere we need to track that - but only for
1008 * that process. If it forks ('F'), we initialize
1009 * the child to have the same cwd as its parent.
1010 *
1011 * We also need to track the 'latestdir' of
1012 * interest. This is usually the same as cwd, but
1013 * not if a process is reading directories.
1014 *
1015 * Each time we spot a different process ('pid')
1016 * we save the current value of 'latestdir' in a
1017 * variable qualified by 'lastpid', and
1018 * re-initialize 'latestdir' to any pre-saved
1019 * value for the current 'pid' and 'CWD' if none.
1020 */
1021 CHECK_VALID_META(p);
1022 pid = atoi(p);
1023 if (pid > 0 && pid != lastpid) {
1024 char *ldir;
1025 char *tp;
1026
1027 if (lastpid > 0) {
1028 /* We need to remember these. */
1029 Var_Set(lcwd_vname, lcwd, VAR_GLOBAL, 0);
1030 Var_Set(ldir_vname, latestdir, VAR_GLOBAL, 0);
1031 }
1032 snprintf(lcwd_vname, sizeof(lcwd_vname), LCWD_VNAME_FMT, pid);
1033 snprintf(ldir_vname, sizeof(ldir_vname), LDIR_VNAME_FMT, pid);
1034 lastpid = pid;
1035 ldir = Var_Value(ldir_vname, VAR_GLOBAL, &tp);
1036 if (ldir) {
1037 strlcpy(latestdir, ldir, sizeof(latestdir));
1038 if (tp)
1039 free(tp);
1040 }
1041 ldir = Var_Value(lcwd_vname, VAR_GLOBAL, &tp);
1042 if (ldir) {
1043 strlcpy(lcwd, ldir, sizeof(lcwd));
1044 if (tp)
1045 free(tp);
1046 }
1047 }
1048 /* Skip past the pid. */
1049 if (strsep(&p, " ") == NULL)
1050 continue;
1051 #ifdef DEBUG_META_MODE
1052 if (DEBUG(META))
1053 fprintf(debug_file, "%s: %d: %d: %c: cwd=%s lcwd=%s ldir=%s\n",
1054 fname, lineno,
1055 pid, buf[0], cwd, lcwd, latestdir);
1056 #endif
1057 break;
1058 }
1059
1060 CHECK_VALID_META(p);
1061
1062 /* Process according to record type. */
1063 switch (buf[0]) {
1064 case 'X': /* eXit */
1065 Var_Delete(lcwd_vname, VAR_GLOBAL);
1066 Var_Delete(ldir_vname, VAR_GLOBAL);
1067 lastpid = 0; /* no need to save ldir_vname */
1068 break;
1069
1070 case 'F': /* [v]Fork */
1071 {
1072 char cldir[64];
1073 int child;
1074
1075 child = atoi(p);
1076 if (child > 0) {
1077 snprintf(cldir, sizeof(cldir), LCWD_VNAME_FMT, child);
1078 Var_Set(cldir, lcwd, VAR_GLOBAL, 0);
1079 snprintf(cldir, sizeof(cldir), LDIR_VNAME_FMT, child);
1080 Var_Set(cldir, latestdir, VAR_GLOBAL, 0);
1081 #ifdef DEBUG_META_MODE
1082 if (DEBUG(META))
1083 fprintf(debug_file, "%s: %d: %d: cwd=%s lcwd=%s ldir=%s\n",
1084 fname, lineno,
1085 child, cwd, lcwd, latestdir);
1086 #endif
1087 }
1088 }
1089 break;
1090
1091 case 'C': /* Chdir */
1092 /* Update lcwd and latest directory. */
1093 strlcpy(latestdir, p, sizeof(latestdir));
1094 strlcpy(lcwd, p, sizeof(lcwd));
1095 Var_Set(lcwd_vname, lcwd, VAR_GLOBAL, 0);
1096 Var_Set(ldir_vname, lcwd, VAR_GLOBAL, 0);
1097 #ifdef DEBUG_META_MODE
1098 if (DEBUG(META))
1099 fprintf(debug_file, "%s: %d: cwd=%s ldir=%s\n", fname, lineno, cwd, lcwd);
1100 #endif
1101 break;
1102
1103 case 'M': /* renaMe */
1104 /*
1105 * For 'M'oves we want to check
1106 * the src as for 'R'ead
1107 * and the target as for 'W'rite.
1108 */
1109 cp = p; /* save this for a second */
1110 /* now get target */
1111 if (strsep(&p, " ") == NULL)
1112 continue;
1113 CHECK_VALID_META(p);
1114 move_target = p;
1115 p = cp;
1116 /* 'L' and 'M' put single quotes around the args */
1117 DEQUOTE(p);
1118 DEQUOTE(move_target);
1119 /* FALLTHROUGH */
1120 case 'D': /* unlink */
1121 if (*p == '/' && !Lst_IsEmpty(missingFiles)) {
1122 /* remove p from the missingFiles list if present */
1123 if ((ln = Lst_Find(missingFiles, p, string_match)) != NULL) {
1124 char *tp = Lst_Datum(ln);
1125 Lst_Remove(missingFiles, ln);
1126 free(tp);
1127 ln = NULL; /* we're done with it */
1128 }
1129 }
1130 if (buf[0] == 'M') {
1131 /* the target of the mv is a file 'W'ritten */
1132 #ifdef DEBUG_META_MODE
1133 if (DEBUG(META))
1134 fprintf(debug_file, "meta_oodate: M %s -> %s\n",
1135 p, move_target);
1136 #endif
1137 p = move_target;
1138 goto check_write;
1139 }
1140 break;
1141 case 'L': /* Link */
1142 /*
1143 * For 'L'inks check
1144 * the src as for 'R'ead
1145 * and the target as for 'W'rite.
1146 */
1147 link_src = p;
1148 /* now get target */
1149 if (strsep(&p, " ") == NULL)
1150 continue;
1151 CHECK_VALID_META(p);
1152 /* 'L' and 'M' put single quotes around the args */
1153 DEQUOTE(p);
1154 DEQUOTE(link_src);
1155 #ifdef DEBUG_META_MODE
1156 if (DEBUG(META))
1157 fprintf(debug_file, "meta_oodate: L %s -> %s\n",
1158 link_src, p);
1159 #endif
1160 /* FALLTHROUGH */
1161 case 'W': /* Write */
1162 check_write:
1163 /*
1164 * If a file we generated within our bailiwick
1165 * but outside of .OBJDIR is missing,
1166 * we need to do it again.
1167 */
1168 /* ignore non-absolute paths */
1169 if (*p != '/')
1170 break;
1171
1172 if (Lst_IsEmpty(metaBailiwick))
1173 break;
1174
1175 /* ignore cwd - normal dependencies handle those */
1176 if (strncmp(p, cwd, cwdlen) == 0)
1177 break;
1178
1179 if (!Lst_ForEach(metaBailiwick, prefix_match, p))
1180 break;
1181
1182 /* tmpdir might be within */
1183 if (tmplen > 0 && strncmp(p, tmpdir, tmplen) == 0)
1184 break;
1185
1186 /* ignore anything containing the string "tmp" */
1187 if ((strstr("tmp", p)))
1188 break;
1189
1190 if ((link_src != NULL && lstat(p, &fs) < 0) ||
1191 (link_src == NULL && stat(p, &fs) < 0)) {
1192 Lst_AtEnd(missingFiles, bmake_strdup(p));
1193 }
1194 break;
1195 check_link_src:
1196 p = link_src;
1197 link_src = NULL;
1198 #ifdef DEBUG_META_MODE
1199 if (DEBUG(META))
1200 fprintf(debug_file, "meta_oodate: L src %s\n", p);
1201 #endif
1202 /* FALLTHROUGH */
1203 case 'R': /* Read */
1204 case 'E': /* Exec */
1205 /*
1206 * Check for runtime files that can't
1207 * be part of the dependencies because
1208 * they are _expected_ to change.
1209 */
1210 if (*p == '/' &&
1211 Lst_ForEach(metaIgnorePaths, prefix_match, p)) {
1212 #ifdef DEBUG_META_MODE
1213 if (DEBUG(META))
1214 fprintf(debug_file, "meta_oodate: ignoring: %s\n",
1215 p);
1216 #endif
1217 break;
1218 }
1219
1220 /*
1221 * The rest of the record is the file name.
1222 * Check if it's not an absolute path.
1223 */
1224 {
1225 char *sdirs[4];
1226 char **sdp;
1227 int sdx = 0;
1228 int found = 0;
1229
1230 if (*p == '/') {
1231 sdirs[sdx++] = p; /* done */
1232 } else {
1233 if (strcmp(".", p) == 0)
1234 continue; /* no point */
1235
1236 /* Check vs latestdir */
1237 snprintf(fname1, sizeof(fname1), "%s/%s", latestdir, p);
1238 sdirs[sdx++] = fname1;
1239
1240 if (strcmp(latestdir, lcwd) != 0) {
1241 /* Check vs lcwd */
1242 snprintf(fname2, sizeof(fname2), "%s/%s", lcwd, p);
1243 sdirs[sdx++] = fname2;
1244 }
1245 if (strcmp(lcwd, cwd) != 0) {
1246 /* Check vs cwd */
1247 snprintf(fname3, sizeof(fname3), "%s/%s", cwd, p);
1248 sdirs[sdx++] = fname3;
1249 }
1250 }
1251 sdirs[sdx++] = NULL;
1252
1253 for (sdp = sdirs; *sdp && !found; sdp++) {
1254 #ifdef DEBUG_META_MODE
1255 if (DEBUG(META))
1256 fprintf(debug_file, "%s: %d: looking for: %s\n", fname, lineno, *sdp);
1257 #endif
1258 if (stat(*sdp, &fs) == 0) {
1259 found = 1;
1260 p = *sdp;
1261 }
1262 }
1263 if (found) {
1264 #ifdef DEBUG_META_MODE
1265 if (DEBUG(META))
1266 fprintf(debug_file, "%s: %d: found: %s\n", fname, lineno, p);
1267 #endif
1268 if (!S_ISDIR(fs.st_mode) &&
1269 fs.st_mtime > gn->mtime) {
1270 if (DEBUG(META))
1271 fprintf(debug_file, "%s: %d: file '%s' is newer than the target...\n", fname, lineno, p);
1272 oodate = TRUE;
1273 } else if (S_ISDIR(fs.st_mode)) {
1274 /* Update the latest directory. */
1275 realpath(p, latestdir);
1276 }
1277 } else if (errno == ENOENT && *p == '/' &&
1278 strncmp(p, cwd, cwdlen) != 0) {
1279 /*
1280 * A referenced file outside of CWD is missing.
1281 * We cannot catch every eventuality here...
1282 */
1283 if (DEBUG(META))
1284 fprintf(debug_file, "%s: %d: file '%s' may have moved?...\n", fname, lineno, p);
1285 oodate = TRUE;
1286 }
1287 }
1288 if (buf[0] == 'E') {
1289 /* previous latestdir is no longer relevant */
1290 strlcpy(latestdir, lcwd, sizeof(latestdir));
1291 }
1292 break;
1293 default:
1294 break;
1295 }
1296 if (!oodate && buf[0] == 'L' && link_src != NULL)
1297 goto check_link_src;
1298 } else if (strcmp(buf, "CMD") == 0) {
1299 /*
1300 * Compare the current command with the one in the
1301 * meta data file.
1302 */
1303 if (ln == NULL) {
1304 if (DEBUG(META))
1305 fprintf(debug_file, "%s: %d: there were more build commands in the meta data file than there are now...\n", fname, lineno);
1306 oodate = TRUE;
1307 } else {
1308 char *cmd = (char *)Lst_Datum(ln);
1309 Boolean hasOODATE = FALSE;
1310
1311 if (strstr(cmd, "$?"))
1312 hasOODATE = TRUE;
1313 else if ((cp = strstr(cmd, ".OODATE"))) {
1314 /* check for $[{(].OODATE[:)}] */
1315 if (cp > cmd + 2 && cp[-2] == '$')
1316 hasOODATE = TRUE;
1317 }
1318 if (hasOODATE) {
1319 needOODATE = TRUE;
1320 if (DEBUG(META))
1321 fprintf(debug_file, "%s: %d: cannot compare command using .OODATE\n", fname, lineno);
1322 }
1323 cmd = Var_Subst(NULL, cmd, gn, TRUE, TRUE);
1324
1325 if ((cp = strchr(cmd, '\n'))) {
1326 int n;
1327
1328 /*
1329 * This command contains newlines, we need to
1330 * fetch more from the .meta file before we
1331 * attempt a comparison.
1332 */
1333 /* first put the newline back at buf[x - 1] */
1334 buf[x - 1] = '\n';
1335 do {
1336 /* now fetch the next line */
1337 if ((n = fgetLine(&buf, &bufsz, x, fp)) <= 0)
1338 break;
1339 x = n;
1340 lineno++;
1341 if (buf[x - 1] != '\n') {
1342 warnx("%s: %d: line truncated at %u", fname, lineno, x);
1343 break;
1344 }
1345 cp = strchr(++cp, '\n');
1346 } while (cp);
1347 if (buf[x - 1] == '\n')
1348 buf[x - 1] = '\0';
1349 }
1350 if (!hasOODATE &&
1351 !(gn->type & OP_NOMETA_CMP) &&
1352 strcmp(p, cmd) != 0) {
1353 if (DEBUG(META))
1354 fprintf(debug_file, "%s: %d: a build command has changed\n%s\nvs\n%s\n", fname, lineno, p, cmd);
1355 if (!metaIgnoreCMDs)
1356 oodate = TRUE;
1357 }
1358 free(cmd);
1359 ln = Lst_Succ(ln);
1360 }
1361 } else if (strcmp(buf, "CWD") == 0) {
1362 /*
1363 * Check if there are extra commands now
1364 * that weren't in the meta data file.
1365 */
1366 if (!oodate && ln != NULL) {
1367 if (DEBUG(META))
1368 fprintf(debug_file, "%s: %d: there are extra build commands now that weren't in the meta data file\n", fname, lineno);
1369 oodate = TRUE;
1370 }
1371 if (strcmp(p, cwd) != 0) {
1372 if (DEBUG(META))
1373 fprintf(debug_file, "%s: %d: the current working directory has changed from '%s' to '%s'\n", fname, lineno, p, curdir);
1374 oodate = TRUE;
1375 }
1376 }
1377 }
1378
1379 fclose(fp);
1380 if (!Lst_IsEmpty(missingFiles)) {
1381 if (DEBUG(META))
1382 fprintf(debug_file, "%s: missing files: %s...\n",
1383 fname, (char *)Lst_Datum(Lst_First(missingFiles)));
1384 oodate = TRUE;
1385 Lst_Destroy(missingFiles, (FreeProc *)free);
1386 }
1387 } else {
1388 if ((gn->type & OP_META)) {
1389 if (DEBUG(META))
1390 fprintf(debug_file, "%s: required but missing\n", fname);
1391 oodate = TRUE;
1392 }
1393 }
1394 if (oodate && needOODATE) {
1395 /*
1396 * Target uses .OODATE which is empty; or we wouldn't be here.
1397 * We have decided it is oodate, so .OODATE needs to be set.
1398 * All we can sanely do is set it to .ALLSRC.
1399 */
1400 Var_Delete(OODATE, gn);
1401 Var_Set(OODATE, Var_Value(ALLSRC, gn, &cp), gn, 0);
1402 if (cp)
1403 free(cp);
1404 }
1405 return oodate;
1406 }
1407
1408 /* support for compat mode */
1409
1410 static int childPipe[2];
1411
1412 void
meta_compat_start(void)1413 meta_compat_start(void)
1414 {
1415 #ifdef USE_FILEMON_ONCE
1416 /*
1417 * We need to re-open filemon for each cmd.
1418 */
1419 BuildMon *pbm = &Mybm;
1420
1421 if (pbm->mfp != NULL && useFilemon) {
1422 filemon_open(pbm);
1423 } else {
1424 pbm->mon_fd = pbm->filemon_fd = -1;
1425 }
1426 #endif
1427 if (pipe(childPipe) < 0)
1428 Punt("Cannot create pipe: %s", strerror(errno));
1429 /* Set close-on-exec flag for both */
1430 (void)fcntl(childPipe[0], F_SETFD, 1);
1431 (void)fcntl(childPipe[1], F_SETFD, 1);
1432 }
1433
1434 void
meta_compat_child(void)1435 meta_compat_child(void)
1436 {
1437 meta_job_child(NULL);
1438 if (dup2(childPipe[1], 1) < 0 ||
1439 dup2(1, 2) < 0) {
1440 execError("dup2", "pipe");
1441 _exit(1);
1442 }
1443 }
1444
1445 void
meta_compat_parent(void)1446 meta_compat_parent(void)
1447 {
1448 FILE *fp;
1449 char buf[BUFSIZ];
1450
1451 close(childPipe[1]); /* child side */
1452 fp = fdopen(childPipe[0], "r");
1453 while (fgets(buf, sizeof(buf), fp)) {
1454 meta_job_output(NULL, buf, "");
1455 printf("%s", buf);
1456 }
1457 fclose(fp);
1458 }
1459
1460 #endif /* USE_META */
1461