1 /* $NetBSD: meta.c,v 1.36 2014/11/06 01:36:57 sjg Exp $ */
4 * Implement 'meta' mode.
5 * Adapted from John Birrell's patches to FreeBSD make.
9 * Copyright (c) 2009-2010, Juniper Networks, Inc.
10 * Portions Copyright (c) 2009, John Birrell.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
39 #include <sys/ioctl.h>
43 #if !defined(HAVE_CONFIG_H) || defined(HAVE_ERR_H)
53 #if !defined(USE_FILEMON) && defined(FILEMON_SET_FD)
57 static BuildMon Mybm
; /* for compat */
58 static Lst metaBailiwick
; /* our scope of control */
59 static Lst metaIgnorePaths
; /* paths we deliberately ignore */
61 #ifndef MAKE_META_IGNORE_PATHS
62 #define MAKE_META_IGNORE_PATHS ".MAKE.META.IGNORE_PATHS"
65 Boolean useMeta
= FALSE
;
66 static Boolean useFilemon
= FALSE
;
67 static Boolean writeMeta
= FALSE
;
68 static Boolean metaEnv
= FALSE
; /* don't save env unless asked */
69 static Boolean metaVerbose
= FALSE
;
70 static Boolean metaIgnoreCMDs
= FALSE
; /* ignore CMDs in .meta files */
71 static Boolean metaCurdirOk
= FALSE
; /* write .meta in .CURDIR Ok? */
72 static Boolean metaSilent
= FALSE
; /* if we have a .meta be SILENT */
74 extern Boolean forceJobs
;
75 extern Boolean comatMake
;
76 extern char **environ
;
78 #define MAKE_META_PREFIX ".MAKE.META.PREFIX"
81 # define N2U(n, u) (((n) + ((u) - 1)) / (u))
84 # define ROUNDUP(n, u) (N2U((n), (u)) * (u))
87 #if !defined(HAVE_STRSEP)
88 # define strsep(s, d) stresep((s), (d), 0)
92 * Filemon is a kernel module which snoops certain syscalls.
103 * See meta_oodate below - we mainly care about 'E' and 'R'.
105 * We can still use meta mode without filemon, but
106 * the benefits are more limited.
109 # ifndef _PATH_FILEMON
110 # define _PATH_FILEMON "/dev/filemon"
114 * Open the filemon device.
117 filemon_open(BuildMon
*pbm
)
121 pbm
->mon_fd
= pbm
->filemon_fd
= -1;
125 for (retry
= 5; retry
>= 0; retry
--) {
126 if ((pbm
->filemon_fd
= open(_PATH_FILEMON
, O_RDWR
)) >= 0)
130 if (pbm
->filemon_fd
< 0) {
132 warn("Could not open %s", _PATH_FILEMON
);
137 * We use a file outside of '.'
138 * to avoid a FreeBSD kernel bug where unlink invalidates
139 * cwd causing getcwd to do a lot more work.
140 * We only care about the descriptor.
142 pbm
->mon_fd
= mkTempFile("filemon.XXXXXX", NULL
);
143 if (ioctl(pbm
->filemon_fd
, FILEMON_SET_FD
, &pbm
->mon_fd
) < 0) {
144 err(1, "Could not set filemon file descriptor!");
146 /* we don't need these once we exec */
147 (void)fcntl(pbm
->mon_fd
, F_SETFD
, 1);
148 (void)fcntl(pbm
->filemon_fd
, F_SETFD
, 1);
152 * Read the build monitor output file and write records to the target's
156 filemon_read(FILE *mfp
, int fd
)
161 /* Check if we're not writing to a meta data file.*/
164 close(fd
); /* not interested */
168 (void)lseek(fd
, (off_t
)0, SEEK_SET
);
170 fprintf(mfp
, "\n-- filemon acquired metadata --\n");
172 while ((n
= read(fd
, buf
, sizeof(buf
))) > 0) {
173 fwrite(buf
, 1, n
, mfp
);
181 * when realpath() fails,
182 * we use this, to clean up ./ and ../
185 eat_dots(char *buf
, size_t bufsz
, int dots
)
206 cp
= strstr(buf
, eat
);
209 if (dots
== 2 && cp
> buf
) {
212 } while (cp
> buf
&& *cp
!= '/');
215 strlcpy(cp
, cp2
, bufsz
- (cp
- buf
));
217 return; /* can't happen? */
224 meta_name(struct GNode
*gn
, char *mname
, size_t mnamelen
,
228 char buf
[MAXPATHLEN
];
229 char cwd
[MAXPATHLEN
];
233 char *p
[4]; /* >= number of possible uses */
238 dname
= Var_Value(".OBJDIR", gn
, &p
[i
++]);
240 tname
= Var_Value(TARGET
, gn
, &p
[i
++]);
242 if (realpath(dname
, cwd
))
246 * Weed out relative paths from the target file name.
247 * We have to be careful though since if target is a
248 * symlink, the result will be unstable.
249 * So we use realpath() just to get the dirname, and leave the
250 * basename as given to us.
252 if ((cp
= strrchr(tname
, '/'))) {
253 if (realpath(tname
, buf
)) {
254 if ((rp
= strrchr(buf
, '/'))) {
257 if (strcmp(cp
, rp
) != 0)
258 strlcpy(rp
, cp
, sizeof(buf
) - (rp
- buf
));
263 * We likely have a directory which is about to be made.
264 * We pretend realpath() succeeded, to have a chance
265 * of generating the same meta file name that we will
268 if (tname
[0] == '/') {
269 strlcpy(buf
, tname
, sizeof(buf
));
271 snprintf(buf
, sizeof(buf
), "%s/%s", cwd
, tname
);
273 eat_dots(buf
, sizeof(buf
), 1); /* ./ */
274 eat_dots(buf
, sizeof(buf
), 2); /* ../ */
278 /* on some systems dirname may modify its arg */
279 tp
= bmake_strdup(tname
);
280 if (strcmp(dname
, dirname(tp
)) == 0)
281 snprintf(mname
, mnamelen
, "%s.meta", tname
);
283 snprintf(mname
, mnamelen
, "%s/%s.meta", dname
, tname
);
286 * Replace path separators in the file name after the
287 * current object directory path.
289 cp
= mname
+ strlen(dname
) + 1;
291 while (*cp
!= '\0') {
298 for (i
--; i
>= 0; i
--) {
306 * Return true if running ${.MAKE}
307 * Bypassed if target is flagged .MAKE
310 is_submake(void *cmdp
, void *gnp
)
312 static char *p_make
= NULL
;
319 int rc
= 0; /* keep looking */
322 p_make
= Var_Value(".MAKE", gn
, &cp
);
323 p_len
= strlen(p_make
);
325 cp
= strchr(cmd
, '$');
327 mp
= Var_Subst(NULL
, cmd
, gn
, FALSE
);
330 cp2
= strstr(cmd
, p_make
);
332 switch (cp2
[p_len
]) {
340 if (cp2
> cmd
&& rc
> 0) {
347 rc
= 0; /* no match */
357 typedef struct meta_file_s
{
363 printCMD(void *cmdp
, void *mfpp
)
365 meta_file_t
*mfp
= mfpp
;
369 if (strchr(cmd
, '$')) {
370 cmd
= cp
= Var_Subst(NULL
, cmd
, mfp
->gn
, FALSE
);
372 fprintf(mfp
->fp
, "CMD %s\n", cmd
);
379 * Certain node types never get a .meta file
381 #define SKIP_META_TYPE(_type) do { \
382 if ((gn->type & __CONCAT(OP_, _type))) { \
384 fprintf(debug_file, "Skipping meta for %s: .%s\n", \
385 gn->name, __STRING(_type)); \
392 meta_create(BuildMon
*pbm
, GNode
*gn
)
395 char buf
[MAXPATHLEN
];
396 char objdir
[MAXPATHLEN
];
402 char *p
[4]; /* >= possible uses */
407 /* This may be a phony node which we don't want meta data for... */
408 /* Skip .meta for .BEGIN, .END, .ERROR etc as well. */
409 /* Or it may be explicitly flagged as .NOMETA */
410 SKIP_META_TYPE(NOMETA
);
411 /* Unless it is explicitly flagged as .META */
412 if (!(gn
->type
& OP_META
)) {
413 SKIP_META_TYPE(PHONY
);
414 SKIP_META_TYPE(SPECIAL
);
415 SKIP_META_TYPE(MAKE
);
422 dname
= Var_Value(".OBJDIR", gn
, &p
[i
++]);
423 tname
= Var_Value(TARGET
, gn
, &p
[i
++]);
425 /* The object directory may not exist. Check it.. */
426 if (stat(dname
, &fs
) != 0) {
428 fprintf(debug_file
, "Skipping meta for %s: no .OBJDIR\n",
432 /* Check if there are no commands to execute. */
433 if (Lst_IsEmpty(gn
->commands
)) {
435 fprintf(debug_file
, "Skipping meta for %s: no commands\n",
440 /* make sure these are canonical */
441 if (realpath(dname
, objdir
))
444 /* If we aren't in the object directory, don't create a meta file. */
445 if (!metaCurdirOk
&& strcmp(curdir
, dname
) == 0) {
447 fprintf(debug_file
, "Skipping meta for %s: .OBJDIR == .CURDIR\n",
451 if (!(gn
->type
& OP_META
)) {
452 /* We do not generate .meta files for sub-makes */
453 if (Lst_ForEach(gn
->commands
, is_submake
, gn
)) {
455 fprintf(debug_file
, "Skipping meta for %s: .MAKE\n",
464 /* Describe the target we are building */
465 mp
= Var_Subst(NULL
, "${" MAKE_META_PREFIX
"}", gn
, 0);
467 fprintf(stdout
, "%s\n", mp
);
470 /* Get the basename of the target */
471 if ((cp
= strrchr(tname
, '/')) == NULL
) {
479 if (strcmp(cp
, makeDependfile
) == 0)
483 /* Don't create meta data. */
486 fname
= meta_name(gn
, pbm
->meta_fname
, sizeof(pbm
->meta_fname
),
489 #ifdef DEBUG_META_MODE
491 fprintf(debug_file
, "meta_create: %s\n", fname
);
494 if ((mf
.fp
= fopen(fname
, "w")) == NULL
)
495 err(1, "Could not open meta file '%s'", fname
);
497 fprintf(mf
.fp
, "# Meta data file %s\n", fname
);
501 Lst_ForEach(gn
->commands
, printCMD
, &mf
);
503 fprintf(mf
.fp
, "CWD %s\n", getcwd(buf
, sizeof(buf
)));
504 fprintf(mf
.fp
, "TARGET %s\n", tname
);
507 for (ptr
= environ
; *ptr
!= NULL
; ptr
++)
508 fprintf(mf
.fp
, "ENV %s\n", *ptr
);
511 fprintf(mf
.fp
, "-- command output --\n");
514 Var_Append(".MAKE.META.FILES", fname
, VAR_GLOBAL
);
515 Var_Append(".MAKE.META.CREATED", fname
, VAR_GLOBAL
);
517 gn
->type
|= OP_META
; /* in case anyone wants to know */
519 gn
->type
|= OP_SILENT
;
522 for (i
--; i
>= 0; i
--) {
545 * Initialization we need before reading makefiles.
551 /* this allows makefiles to test if we have filemon support */
552 Var_Set(".MAKE.PATH_FILEMON", _PATH_FILEMON
, VAR_GLOBAL
, 0);
558 * Initialization we need after reading makefiles.
561 meta_mode_init(const char *make_mode
)
571 if (strstr(make_mode
, "env"))
573 if (strstr(make_mode
, "verb"))
575 if (strstr(make_mode
, "read"))
577 if (strstr(make_mode
, "nofilemon"))
579 if ((cp
= strstr(make_mode
, "curdirok="))) {
580 metaCurdirOk
= boolValue(&cp
[9]);
582 if ((cp
= strstr(make_mode
, "silent="))) {
583 metaSilent
= boolValue(&cp
[7]);
585 if (strstr(make_mode
, "ignore-cmd"))
586 metaIgnoreCMDs
= TRUE
;
587 /* for backwards compatability */
588 Var_Set(".MAKE.META_CREATED", "${.MAKE.META.CREATED}", VAR_GLOBAL
, 0);
589 Var_Set(".MAKE.META_FILES", "${.MAKE.META.FILES}", VAR_GLOBAL
, 0);
591 if (metaVerbose
&& !Var_Exists(MAKE_META_PREFIX
, VAR_GLOBAL
)) {
593 * The default value for MAKE_META_PREFIX
594 * prints the absolute path of the target.
595 * This works be cause :H will generate '.' if there is no /
596 * and :tA will resolve that to cwd.
598 Var_Set(MAKE_META_PREFIX
, "Building ${.TARGET:H:tA}/${.TARGET:T}", VAR_GLOBAL
, 0);
603 memset(&Mybm
, 0, sizeof(Mybm
));
605 * We consider ourselves master of all within ${.MAKE.META.BAILIWICK}
607 metaBailiwick
= Lst_Init(FALSE
);
608 cp
= Var_Subst(NULL
, "${.MAKE.META.BAILIWICK:O:u:tA}", VAR_GLOBAL
, 0);
610 str2Lst_Append(metaBailiwick
, cp
, NULL
);
613 * We ignore any paths that start with ${.MAKE.META.IGNORE_PATHS}
615 metaIgnorePaths
= Lst_Init(FALSE
);
616 Var_Append(MAKE_META_IGNORE_PATHS
,
617 "/dev /etc /proc /tmp /var/run /var/tmp ${TMPDIR}", VAR_GLOBAL
);
619 "${" MAKE_META_IGNORE_PATHS
":O:u:tA}", VAR_GLOBAL
, 0);
621 str2Lst_Append(metaIgnorePaths
, cp
, NULL
);
626 * In each case below we allow for job==NULL
629 meta_job_start(Job
*job
, GNode
*gn
)
638 pbm
->mfp
= meta_create(pbm
, gn
);
639 #ifdef USE_FILEMON_ONCE
640 /* compat mode we open the filemon dev once per command */
645 if (pbm
->mfp
!= NULL
&& useFilemon
) {
648 pbm
->mon_fd
= pbm
->filemon_fd
= -1;
654 * The child calls this before doing anything.
655 * It does not disturb our state.
658 meta_job_child(Job __unused
*job
)
670 if (pbm
->mfp
!= NULL
&& useFilemon
) {
671 if (ioctl(pbm
->filemon_fd
, FILEMON_SET_PID
, &pid
) < 0) {
672 err(1, "Could not set filemon pid!");
679 meta_job_error(Job
*job
, GNode
*gn
, int flags
, int status
)
681 char cwd
[MAXPATHLEN
];
691 if (pbm
->mfp
!= NULL
) {
692 fprintf(pbm
->mfp
, "*** Error code %d%s\n",
694 (flags
& JOB_IGNERR
) ?
698 Var_Set(".ERROR_TARGET", gn
->path
? gn
->path
: gn
->name
, VAR_GLOBAL
, 0);
700 getcwd(cwd
, sizeof(cwd
));
701 Var_Set(".ERROR_CWD", cwd
, VAR_GLOBAL
, 0);
702 if (pbm
&& pbm
->meta_fname
[0]) {
703 Var_Set(".ERROR_META_FILE", pbm
->meta_fname
, VAR_GLOBAL
, 0);
705 meta_job_finish(job
);
709 meta_job_output(Job
*job
, char *cp
, const char *nl
)
718 if (pbm
->mfp
!= NULL
) {
720 static char *meta_prefix
= NULL
;
721 static int meta_prefix_len
;
726 meta_prefix
= Var_Subst(NULL
, "${" MAKE_META_PREFIX
"}", VAR_GLOBAL
, 0);
727 if ((cp2
= strchr(meta_prefix
, '$')))
728 meta_prefix_len
= cp2
- meta_prefix
;
730 meta_prefix_len
= strlen(meta_prefix
);
732 if (strncmp(cp
, meta_prefix
, meta_prefix_len
) == 0) {
733 cp
= strchr(cp
+1, '\n');
738 fprintf(pbm
->mfp
, "%s%s", cp
, nl
);
743 meta_cmd_finish(void __unused
*pbmp
)
746 BuildMon
*pbm
= pbmp
;
751 if (pbm
->filemon_fd
>= 0) {
752 close(pbm
->filemon_fd
);
753 filemon_read(pbm
->mfp
, pbm
->mon_fd
);
754 pbm
->filemon_fd
= pbm
->mon_fd
= -1;
760 meta_job_finish(Job
*job
)
769 if (pbm
->mfp
!= NULL
) {
770 meta_cmd_finish(pbm
);
773 pbm
->meta_fname
[0] = '\0';
778 * Fetch a full line from fp - growing bufp if needed
779 * Return length in bufp.
782 fgetLine(char **bufp
, size_t *szp
, int o
, FILE *fp
)
789 if (fgets(&buf
[o
], bufsz
- o
, fp
) != NULL
) {
791 x
= o
+ strlen(&buf
[o
]);
792 if (buf
[x
- 1] == '\n')
795 * We need to grow the buffer.
796 * The meta file can give us a clue.
798 if (fstat(fileno(fp
), &fs
) == 0) {
802 newsz
= ROUNDUP((fs
.st_size
/ 2), BUFSIZ
);
804 newsz
= ROUNDUP(fs
.st_size
, BUFSIZ
);
806 fprintf(debug_file
, "growing buffer %u -> %u\n",
807 (unsigned)bufsz
, (unsigned)newsz
);
808 p
= bmake_realloc(buf
, newsz
);
811 *szp
= bufsz
= newsz
;
813 if (!fgets(&buf
[x
], bufsz
- x
, fp
))
814 return x
; /* truncated! */
823 prefix_match(void *p
, void *q
)
825 const char *prefix
= p
;
826 const char *path
= q
;
827 size_t n
= strlen(prefix
);
829 return (0 == strncmp(path
, prefix
, n
));
833 string_match(const void *p
, const void *q
)
838 return strcmp(p1
, p2
);
843 * When running with 'meta' functionality, a target can be out-of-date
844 * if any of the references in its meta data file is more recent.
845 * We have to track the latestdir on a per-process basis.
847 #define LDIR_VNAME_FMT ".meta.%d.ldir"
850 * It is possible that a .meta file is corrupted,
851 * if we detect this we want to reproduce it.
852 * Setting oodate TRUE will have that effect.
854 #define CHECK_VALID_META(p) if (!(p && *p)) { \
855 warnx("%s: %d: malformed", fname, lineno); \
860 #define DEQUOTE(p) if (*p == '\'') { \
863 if ((ep = strchr(p, '\''))) \
868 meta_oodate(GNode
*gn
, Boolean oodate
)
870 static char *tmpdir
= NULL
;
871 static char cwd
[MAXPATHLEN
];
873 char latestdir
[MAXPATHLEN
];
874 char fname
[MAXPATHLEN
];
875 char fname1
[MAXPATHLEN
];
876 char fname2
[MAXPATHLEN
];
881 static size_t cwdlen
= 0;
882 static size_t tmplen
= 0;
884 Boolean needOODATE
= FALSE
;
888 return oodate
; /* we're done */
890 missingFiles
= Lst_Init(FALSE
);
893 * We need to check if the target is out-of-date. This includes
894 * checking if the expanded command has changed. This in turn
895 * requires that all variables are set in the same way that they
896 * would be if the target needs to be re-built.
900 meta_name(gn
, fname
, sizeof(fname
), NULL
, NULL
);
902 #ifdef DEBUG_META_MODE
904 fprintf(debug_file
, "meta_oodate: %s\n", fname
);
907 if ((fp
= fopen(fname
, "r")) != NULL
) {
908 static char *buf
= NULL
;
920 buf
= bmake_malloc(bufsz
);
924 if (getcwd(cwd
, sizeof(cwd
)) == NULL
)
925 err(1, "Could not get current working directory");
926 cwdlen
= strlen(cwd
);
930 tmpdir
= getTmpdir();
931 tmplen
= strlen(tmpdir
);
934 /* we want to track all the .meta we read */
935 Var_Append(".MAKE.META.FILES", fname
, VAR_GLOBAL
);
937 ln
= Lst_First(gn
->commands
);
938 while (!oodate
&& (x
= fgetLine(&buf
, &bufsz
, 0, fp
)) > 0) {
940 if (buf
[x
- 1] == '\n')
943 warnx("%s: %d: line truncated at %u", fname
, lineno
, x
);
949 /* Find the start of the build monitor section. */
951 if (strncmp(buf
, "-- filemon", 10) == 0) {
955 if (strncmp(buf
, "# buildmon", 10) == 0) {
961 /* Delimit the record type. */
963 #ifdef DEBUG_META_MODE
965 fprintf(debug_file
, "%s: %d: %s\n", fname
, lineno
, buf
);
970 * We are in the 'filemon' output section.
971 * Each record from filemon follows the general form:
976 * <key> is a single letter, denoting the syscall.
977 * <pid> is the process that made the syscall.
978 * <data> is the arguments (of interest).
981 case '#': /* comment */
982 case 'V': /* version */
986 * We need to track pathnames per-process.
988 * Each process run by make, starts off in the 'CWD'
989 * recorded in the .meta file, if it chdirs ('C')
990 * elsewhere we need to track that - but only for
991 * that process. If it forks ('F'), we initialize
992 * the child to have the same cwd as its parent.
994 * We also need to track the 'latestdir' of
995 * interest. This is usually the same as cwd, but
996 * not if a process is reading directories.
998 * Each time we spot a different process ('pid')
999 * we save the current value of 'latestdir' in a
1000 * variable qualified by 'lastpid', and
1001 * re-initialize 'latestdir' to any pre-saved
1002 * value for the current 'pid' and 'CWD' if none.
1004 CHECK_VALID_META(p
);
1006 if (pid
> 0 && pid
!= lastpid
) {
1011 /* We need to remember this. */
1012 Var_Set(ldir_vname
, latestdir
, VAR_GLOBAL
, 0);
1014 snprintf(ldir_vname
, sizeof(ldir_vname
), LDIR_VNAME_FMT
, pid
);
1016 ldir
= Var_Value(ldir_vname
, VAR_GLOBAL
, &tp
);
1018 strlcpy(latestdir
, ldir
, sizeof(latestdir
));
1022 strlcpy(latestdir
, cwd
, sizeof(latestdir
));
1024 /* Skip past the pid. */
1025 if (strsep(&p
, " ") == NULL
)
1027 #ifdef DEBUG_META_MODE
1029 fprintf(debug_file
, "%s: %d: cwd=%s ldir=%s\n", fname
, lineno
, cwd
, latestdir
);
1034 CHECK_VALID_META(p
);
1036 /* Process according to record type. */
1038 case 'X': /* eXit */
1039 Var_Delete(ldir_vname
, VAR_GLOBAL
);
1040 lastpid
= 0; /* no need to save ldir_vname */
1043 case 'F': /* [v]Fork */
1050 snprintf(cldir
, sizeof(cldir
), LDIR_VNAME_FMT
, child
);
1051 Var_Set(cldir
, latestdir
, VAR_GLOBAL
, 0);
1056 case 'C': /* Chdir */
1057 /* Update the latest directory. */
1058 strlcpy(latestdir
, p
, sizeof(latestdir
));
1061 case 'M': /* renaMe */
1063 * For 'M'oves we want to check
1064 * the src as for 'R'ead
1065 * and the target as for 'W'rite.
1067 cp
= p
; /* save this for a second */
1068 /* now get target */
1069 if (strsep(&p
, " ") == NULL
)
1071 CHECK_VALID_META(p
);
1074 /* 'L' and 'M' put single quotes around the args */
1076 DEQUOTE(move_target
);
1078 case 'D': /* unlink */
1079 if (*p
== '/' && !Lst_IsEmpty(missingFiles
)) {
1080 /* remove p from the missingFiles list if present */
1081 if ((ln
= Lst_Find(missingFiles
, p
, string_match
)) != NULL
) {
1082 char *tp
= Lst_Datum(ln
);
1083 Lst_Remove(missingFiles
, ln
);
1085 ln
= NULL
; /* we're done with it */
1088 if (buf
[0] == 'M') {
1089 /* the target of the mv is a file 'W'ritten */
1090 #ifdef DEBUG_META_MODE
1092 fprintf(debug_file
, "meta_oodate: M %s -> %s\n",
1099 case 'L': /* Link */
1102 * the src as for 'R'ead
1103 * and the target as for 'W'rite.
1106 /* now get target */
1107 if (strsep(&p
, " ") == NULL
)
1109 CHECK_VALID_META(p
);
1110 /* 'L' and 'M' put single quotes around the args */
1113 #ifdef DEBUG_META_MODE
1115 fprintf(debug_file
, "meta_oodate: L %s -> %s\n",
1119 case 'W': /* Write */
1122 * If a file we generated within our bailiwick
1123 * but outside of .OBJDIR is missing,
1124 * we need to do it again.
1126 /* ignore non-absolute paths */
1130 if (Lst_IsEmpty(metaBailiwick
))
1133 /* ignore cwd - normal dependencies handle those */
1134 if (strncmp(p
, cwd
, cwdlen
) == 0)
1137 if (!Lst_ForEach(metaBailiwick
, prefix_match
, p
))
1140 /* tmpdir might be within */
1141 if (tmplen
> 0 && strncmp(p
, tmpdir
, tmplen
) == 0)
1144 /* ignore anything containing the string "tmp" */
1145 if ((strstr("tmp", p
)))
1148 if (stat(p
, &fs
) < 0) {
1149 Lst_AtEnd(missingFiles
, bmake_strdup(p
));
1155 #ifdef DEBUG_META_MODE
1157 fprintf(debug_file
, "meta_oodate: L src %s\n", p
);
1160 case 'R': /* Read */
1161 case 'E': /* Exec */
1163 * Check for runtime files that can't
1164 * be part of the dependencies because
1165 * they are _expected_ to change.
1168 Lst_ForEach(metaIgnorePaths
, prefix_match
, p
)) {
1169 #ifdef DEBUG_META_MODE
1171 fprintf(debug_file
, "meta_oodate: ignoring: %s\n",
1177 if ((cp
= strrchr(p
, '/'))) {
1180 * We don't normally expect to see this,
1181 * but we do expect it to change.
1183 if (strcmp(cp
, makeDependfile
) == 0)
1188 * The rest of the record is the file name.
1189 * Check if it's not an absolute path.
1198 sdirs
[sdx
++] = p
; /* done */
1200 if (strcmp(".", p
) == 0)
1201 continue; /* no point */
1203 /* Check vs latestdir */
1204 snprintf(fname1
, sizeof(fname1
), "%s/%s", latestdir
, p
);
1205 sdirs
[sdx
++] = fname1
;
1207 if (strcmp(latestdir
, cwd
) != 0) {
1209 snprintf(fname2
, sizeof(fname2
), "%s/%s", cwd
, p
);
1210 sdirs
[sdx
++] = fname2
;
1213 sdirs
[sdx
++] = NULL
;
1215 for (sdp
= sdirs
; *sdp
&& !found
; sdp
++) {
1216 #ifdef DEBUG_META_MODE
1218 fprintf(debug_file
, "%s: %d: looking for: %s\n", fname
, lineno
, *sdp
);
1220 if (stat(*sdp
, &fs
) == 0) {
1226 #ifdef DEBUG_META_MODE
1228 fprintf(debug_file
, "%s: %d: found: %s\n", fname
, lineno
, p
);
1230 if (!S_ISDIR(fs
.st_mode
) &&
1231 fs
.st_mtime
> gn
->mtime
) {
1233 fprintf(debug_file
, "%s: %d: file '%s' is newer than the target...\n", fname
, lineno
, p
);
1235 } else if (S_ISDIR(fs
.st_mode
)) {
1236 /* Update the latest directory. */
1237 realpath(p
, latestdir
);
1239 } else if (errno
== ENOENT
&& *p
== '/' &&
1240 strncmp(p
, cwd
, cwdlen
) != 0) {
1242 * A referenced file outside of CWD is missing.
1243 * We cannot catch every eventuality here...
1246 fprintf(debug_file
, "%s: %d: file '%s' may have moved?...\n", fname
, lineno
, p
);
1254 if (!oodate
&& buf
[0] == 'L' && link_src
!= NULL
)
1255 goto check_link_src
;
1256 } else if (strcmp(buf
, "CMD") == 0) {
1258 * Compare the current command with the one in the
1263 fprintf(debug_file
, "%s: %d: there were more build commands in the meta data file than there are now...\n", fname
, lineno
);
1266 char *cmd
= (char *)Lst_Datum(ln
);
1267 Boolean hasOODATE
= FALSE
;
1269 if (strstr(cmd
, "$?"))
1271 else if ((cp
= strstr(cmd
, ".OODATE"))) {
1272 /* check for $[{(].OODATE[:)}] */
1273 if (cp
> cmd
+ 2 && cp
[-2] == '$')
1279 fprintf(debug_file
, "%s: %d: cannot compare command using .OODATE\n", fname
, lineno
);
1281 cmd
= Var_Subst(NULL
, cmd
, gn
, TRUE
);
1283 if ((cp
= strchr(cmd
, '\n'))) {
1287 * This command contains newlines, we need to
1288 * fetch more from the .meta file before we
1289 * attempt a comparison.
1291 /* first put the newline back at buf[x - 1] */
1294 /* now fetch the next line */
1295 if ((n
= fgetLine(&buf
, &bufsz
, x
, fp
)) <= 0)
1299 if (buf
[x
- 1] != '\n') {
1300 warnx("%s: %d: line truncated at %u", fname
, lineno
, x
);
1303 cp
= strchr(++cp
, '\n');
1305 if (buf
[x
- 1] == '\n')
1309 !(gn
->type
& OP_NOMETA_CMP
) &&
1310 strcmp(p
, cmd
) != 0) {
1312 fprintf(debug_file
, "%s: %d: a build command has changed\n%s\nvs\n%s\n", fname
, lineno
, p
, cmd
);
1313 if (!metaIgnoreCMDs
)
1319 } else if (strcmp(buf
, "CWD") == 0) {
1321 * Check if there are extra commands now
1322 * that weren't in the meta data file.
1324 if (!oodate
&& ln
!= NULL
) {
1326 fprintf(debug_file
, "%s: %d: there are extra build commands now that weren't in the meta data file\n", fname
, lineno
);
1329 if (strcmp(p
, cwd
) != 0) {
1331 fprintf(debug_file
, "%s: %d: the current working directory has changed from '%s' to '%s'\n", fname
, lineno
, p
, curdir
);
1338 if (!Lst_IsEmpty(missingFiles
)) {
1340 fprintf(debug_file
, "%s: missing files: %s...\n",
1341 fname
, (char *)Lst_Datum(Lst_First(missingFiles
)));
1343 Lst_Destroy(missingFiles
, (FreeProc
*)free
);
1346 if ((gn
->type
& OP_META
)) {
1348 fprintf(debug_file
, "%s: required but missing\n", fname
);
1352 if (oodate
&& needOODATE
) {
1354 * Target uses .OODATE which is empty; or we wouldn't be here.
1355 * We have decided it is oodate, so .OODATE needs to be set.
1356 * All we can sanely do is set it to .ALLSRC.
1358 Var_Delete(OODATE
, gn
);
1359 Var_Set(OODATE
, Var_Value(ALLSRC
, gn
, &cp
), gn
, 0);
1366 /* support for compat mode */
1368 static int childPipe
[2];
1371 meta_compat_start(void)
1373 #ifdef USE_FILEMON_ONCE
1375 * We need to re-open filemon for each cmd.
1377 BuildMon
*pbm
= &Mybm
;
1379 if (pbm
->mfp
!= NULL
&& useFilemon
) {
1382 pbm
->mon_fd
= pbm
->filemon_fd
= -1;
1385 if (pipe(childPipe
) < 0)
1386 Punt("Cannot create pipe: %s", strerror(errno
));
1387 /* Set close-on-exec flag for both */
1388 (void)fcntl(childPipe
[0], F_SETFD
, 1);
1389 (void)fcntl(childPipe
[1], F_SETFD
, 1);
1393 meta_compat_child(void)
1395 meta_job_child(NULL
);
1396 if (dup2(childPipe
[1], 1) < 0 ||
1398 execError("dup2", "pipe");
1404 meta_compat_parent(void)
1409 close(childPipe
[1]); /* child side */
1410 fp
= fdopen(childPipe
[0], "r");
1411 while (fgets(buf
, sizeof(buf
), fp
)) {
1412 meta_job_output(NULL
, buf
, "");
1418 #endif /* USE_META */