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4 * Copyright (c) 1989 by Berkeley Softworks
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38 * @(#)arch.c 8.2 (Berkeley) 1/2/94
39 * $FreeBSD: src/usr.bin/make/arch.c,v 1.15.2.1 2001/02/13 03:13:57 will Exp $
40 * $DragonFly: src/usr.bin/make/arch.c,v 1.28 2005/01/31 21:13:07 okumoto Exp $
45 * Functions to manipulate libraries, archives and their members.
47 * Once again, cacheing/hashing comes into play in the manipulation
48 * of archives. The first time an archive is referenced, all of its members'
49 * headers are read and hashed and the archive closed again. All hashed
50 * archives are kept on a list which is searched each time an archive member
53 * The interface to this module is:
54 * Arch_ParseArchive Given an archive specification, return a list
55 * of GNode's, one for each member in the spec.
56 * FAILURE is returned if the specification is
57 * invalid for some reason.
59 * Arch_Touch Alter the modification time of the archive
60 * member described by the given node to be
63 * Arch_TouchLib Update the modification time of the library
64 * described by the given node. This is special
65 * because it also updates the modification time
66 * of the library's table of contents.
68 * Arch_MTime Find the modification time of a member of
69 * an archive *in the archive*. The time is also
70 * placed in the member's GNode. Returns the
73 * Arch_MemTime Find the modification time of a member of
74 * an archive. Called when the member doesn't
75 * already exist. Looks in the archive for the
76 * modification time. Returns the modification
79 * Arch_FindLib Search for a library along a path. The
80 * library name in the GNode should be in
83 * Arch_LibOODate Special function to decide if a library node
86 * Arch_Init Initialize this module.
89 #include <sys/param.h>
90 #include <sys/types.h>
110 /* Lst of archives we've already examined */
111 static Lst archives = Lst_Initializer(archives);
113 typedef struct Arch {
114 char *name; /* Name of archive */
115 Hash_Table members; /* All the members of the archive described
116 * by <name, struct ar_hdr *> key/value pairs */
117 char *fnametab; /* Extended name table strings */
118 size_t fnamesize; /* Size of the string table */
121 static struct ar_hdr *ArchStatMember(const char *, const char *, Boolean);
122 static FILE *ArchFindMember(const char *, const char *, struct ar_hdr *, const char *);
123 #if defined(__svr4__) || defined(__SVR4) || defined(__ELF__)
125 static int ArchSVR4Entry(Arch *, char *, size_t, FILE *);
129 *-----------------------------------------------------------------------
130 * Arch_ParseArchive --
131 * Parse the archive specification in the given line and find/create
132 * the nodes for the specified archive members, placing their nodes
133 * on the given list, given the pointer to the start of the
134 * specification, a Lst on which to place the nodes, and a context
135 * in which to expand variables.
138 * SUCCESS if it was a valid specification. The linePtr is updated
139 * to point to the first non-space after the archive spec. The
140 * nodes for the members are placed on the given list.
143 * Some nodes may be created. The given list is extended.
145 *-----------------------------------------------------------------------
148 Arch_ParseArchive(char **linePtr, Lst *nodeLst, GNode *ctxt)
150 char *cp; /* Pointer into line */
151 GNode *gn; /* New node */
152 char *libName; /* Library-part of specification */
153 char *memName; /* Member-part of specification */
154 char *nameBuf; /* temporary place for node name */
155 char saveChar; /* Ending delimiter of member-name */
156 Boolean subLibName; /* TRUE if libName should have/had
157 * variable substitution performed on it */
163 for (cp = libName; *cp != '(' && *cp != '\0'; cp++) {
166 * Variable spec, so call the Var module to parse the puppy
167 * so we can safely advance beyond it...
173 result = Var_Parse(cp, ctxt, TRUE, &length, &freeIt);
174 if (result == var_Error) {
191 buf = Var_Subst(NULL, libName, ctxt, TRUE);
192 libName = Buf_GetAll(buf, NULL);
193 Buf_Destroy(buf, FALSE);
199 * First skip to the start of the member's name, mark that
200 * place and skip to the end of it (either white-space or
203 Boolean doSubst = FALSE; /* TRUE if need to substitute in memName */
205 while (*cp != '\0' && *cp != ')' && isspace((unsigned char)*cp)) {
209 while (*cp != '\0' && *cp != ')' && !isspace((unsigned char)*cp)) {
212 * Variable spec, so call the Var module to parse the puppy
213 * so we can safely advance beyond it...
219 result = Var_Parse(cp, ctxt, TRUE, &length, &freeIt);
220 if (result == var_Error) {
236 * If the specification ends without a closing parenthesis,
237 * chances are there's something wrong (like a missing backslash),
238 * so it's better to return failure than allow such things to happen
241 printf("No closing parenthesis in archive specification\n");
246 * If we didn't move anywhere, we must be done
256 * XXX: This should be taken care of intelligently by
257 * SuffExpandChildren, both for the archive and the member portions.
260 * If member contains variables, try and substitute for them.
261 * This will slow down archive specs with dynamic sources, of course,
262 * since we'll be (non-)substituting them three times, but them's
263 * the breaks -- we need to do this since SuffExpandChildren calls
264 * us, otherwise we could assume the thing would be taken care of
270 char *oldMemName = memName;
275 * Now form an archive spec and recurse to deal with nested
276 * variables and multi-word variable values.... The results
277 * are just placed at the end of the nodeLst we're returning.
279 buf1 = Var_Subst(NULL, memName, ctxt, TRUE);
280 memName = Buf_GetAll(buf1, NULL);
282 sz = strlen(memName) + strlen(libName) + 3;
284 snprintf(buf, sz, "%s(%s)", libName, memName);
288 if (strchr(memName, '$') && strcmp(memName, oldMemName) == 0) {
290 * Must contain dynamic sources, so we can't deal with it now.
291 * Just create an ARCHV node for the thing and let
292 * SuffExpandChildren handle it...
294 gn = Targ_FindNode(buf, TARG_CREATE);
298 Buf_Destroy(buf1, FALSE);
301 gn->type |= OP_ARCHV;
302 Lst_AtEnd(nodeLst, (void *)gn);
304 } else if (Arch_ParseArchive(&sacrifice, nodeLst, ctxt) != SUCCESS) {
306 * Error in nested call -- free buffer and return FAILURE
310 Buf_Destroy(buf1, FALSE);
314 /* Free buffer and continue with our work. */
316 Buf_Destroy(buf1, FALSE);
318 } else if (Dir_HasWildcards(memName)) {
319 Lst members = Lst_Initializer(members);
321 size_t sz = MAXPATHLEN;
324 nameBuf = emalloc(sz);
326 Dir_Expand(memName, &dirSearchPath, &members);
327 while (!Lst_IsEmpty(&members)) {
328 member = Lst_DeQueue(&members);
329 nsz = strlen(libName) + strlen(member) + 3; /* 3 = ()+\0 */
332 nameBuf = erealloc(nameBuf, sz);
334 snprintf(nameBuf, sz, "%s(%s)", libName, member);
336 gn = Targ_FindNode(nameBuf, TARG_CREATE);
339 /* XXXHB Lst_Destroy(&members) */
343 * We've found the node, but have to make sure the rest of
344 * the world knows it's an archive member, without having
345 * to constantly check for parentheses, so we type the
346 * thing with the OP_ARCHV bit before we place it on the
347 * end of the provided list.
349 gn->type |= OP_ARCHV;
350 Lst_AtEnd(nodeLst, (void *)gn);
355 size_t sz = strlen(libName) + strlen(memName) + 3;
356 nameBuf = emalloc(sz);
357 snprintf(nameBuf, sz, "%s(%s)", libName, memName);
358 gn = Targ_FindNode(nameBuf, TARG_CREATE);
364 * We've found the node, but have to make sure the rest of the
365 * world knows it's an archive member, without having to
366 * constantly check for parentheses, so we type the thing with
367 * the OP_ARCHV bit before we place it on the end of the
370 gn->type |= OP_ARCHV;
371 Lst_AtEnd(nodeLst, gn);
382 * If substituted libName, free it now, since we need it no longer.
389 * We promised the pointer would be set up at the next non-space, so
390 * we must advance cp there before setting *linePtr... (note that on
391 * entrance to the loop, cp is guaranteed to point at a ')')
395 } while (*cp != '\0' && isspace((unsigned char)*cp));
402 *-----------------------------------------------------------------------
404 * See if the given archive is the one we are looking for. Called
405 * From ArchStatMember and ArchFindMember via Lst_Find with the
406 * current list element and the name we want.
409 * 0 if it is, non-zero if it isn't.
414 *-----------------------------------------------------------------------
417 ArchFindArchive(const void *ar, const void *archName)
419 return (strcmp(archName, ((const Arch *)ar)->name));
423 *-----------------------------------------------------------------------
425 * Locate a member of an archive, given the path of the archive and
426 * the path of the desired member, and a boolean representing whether
427 * or not the archive should be hashed (if not already hashed).
430 * A pointer to the current struct ar_hdr structure for the member. Note
431 * That no position is returned, so this is not useful for touching
432 * archive members. This is mostly because we have no assurances that
433 * The archive will remain constant after we read all the headers, so
434 * there's not much point in remembering the position...
438 *-----------------------------------------------------------------------
440 static struct ar_hdr *
441 ArchStatMember(const char *archive, const char *member, Boolean hash)
443 #define AR_MAX_NAME_LEN (sizeof(arh.ar_name) - 1)
444 FILE *arch; /* Stream to archive */
445 int size; /* Size of archive member */
446 char *cp; /* Useful character pointer */
448 LstNode *ln; /* Lst member containing archive descriptor */
449 Arch *ar; /* Archive descriptor */
450 Hash_Entry *he; /* Entry containing member's description */
451 struct ar_hdr arh; /* archive-member header for reading archive */
452 char memName[MAXPATHLEN]; /* Current member name while hashing. */
455 * Because of space constraints and similar things, files are archived
456 * using their final path components, not the entire thing, so we need
457 * to point 'member' to the final component, if there is one, to make
458 * the comparisons easier...
460 cp = strrchr(member, '/');
461 if ((cp != NULL) && (strcmp(member, RANLIBMAG) != 0))
464 ln = Lst_Find(&archives, archive, ArchFindArchive);
468 he = Hash_FindEntry(&ar->members, member);
471 return ((struct ar_hdr *)Hash_GetValue (he));
473 /* Try truncated name */
474 char copy[AR_MAX_NAME_LEN + 1];
475 size_t len = strlen(member);
477 if (len > AR_MAX_NAME_LEN) {
478 len = AR_MAX_NAME_LEN;
479 strncpy(copy, member, AR_MAX_NAME_LEN);
480 copy[AR_MAX_NAME_LEN] = '\0';
482 if ((he = Hash_FindEntry(&ar->members, copy)) != NULL)
483 return (Hash_GetValue(he));
490 * Caller doesn't want the thing hashed, just use ArchFindMember
491 * to read the header for the member out and close down the stream
492 * again. Since the archive is not to be hashed, we assume there's
493 * no need to allocate extra room for the header we're returning,
494 * so just declare it static.
496 static struct ar_hdr sarh;
498 arch = ArchFindMember(archive, member, &sarh, "r");
509 * We don't have this archive on the list yet, so we want to find out
510 * everything that's in it and cache it so we can get at it quickly.
512 arch = fopen(archive, "r");
518 * We use the ARMAG string to make sure this is an archive we
521 if ((fread(magic, SARMAG, 1, arch) != 1) ||
522 (strncmp(magic, ARMAG, SARMAG) != 0)) {
527 ar = emalloc(sizeof(Arch));
528 ar->name = estrdup(archive);
531 Hash_InitTable(&ar->members, -1);
532 memName[AR_MAX_NAME_LEN] = '\0';
534 while (fread(&arh, sizeof(struct ar_hdr), 1, arch) == 1) {
535 if (strncmp(arh.ar_fmag, ARFMAG, sizeof(arh.ar_fmag)) != 0) {
537 * The header is bogus, so the archive is bad
538 * and there's no way we can recover...
543 * We need to advance the stream's pointer to the start of the
544 * next header. Files are padded with newlines to an even-byte
545 * boundary, so we need to extract the size of the file from the
546 * 'size' field of the header and round it up during the seek.
548 arh.ar_size[sizeof(arh.ar_size) - 1] = '\0';
549 size = (int)strtol(arh.ar_size, NULL, 10);
551 strncpy(memName, arh.ar_name, sizeof(arh.ar_name));
552 for (cp = &memName[AR_MAX_NAME_LEN]; *cp == ' '; cp--) {
559 * svr4 names are slash terminated. Also svr4 extended AR format.
561 if (memName[0] == '/') {
563 * svr4 magic mode; handle it
565 switch (ArchSVR4Entry(ar, memName, size, arch)) {
566 case -1: /* Invalid data */
568 case 0: /* List of files entry */
570 default: /* Got the entry */
582 * BSD 4.4 extended AR format: #1/<namelen>, with name as the
583 * first <namelen> bytes of the file
585 if (strncmp(memName, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 &&
586 isdigit(memName[sizeof(AR_EFMT1) - 1])) {
588 unsigned int elen = atoi(&memName[sizeof(AR_EFMT1)-1]);
590 if (elen > MAXPATHLEN)
592 if (fread(memName, elen, 1, arch) != 1)
594 memName[elen] = '\0';
595 fseek(arch, -elen, SEEK_CUR);
596 /* XXX Multiple levels may be asked for, make this conditional
597 * on one, and use DEBUGF.
599 if (DEBUG(ARCH) || DEBUG(MAKE)) {
600 fprintf(stderr, "ArchStat: Extended format entry for %s\n", memName);
605 he = Hash_CreateEntry(&ar->members, memName, NULL);
606 Hash_SetValue(he, emalloc(sizeof(struct ar_hdr)));
607 memcpy(Hash_GetValue(he), &arh, sizeof(struct ar_hdr));
609 fseek(arch, (size + 1) & ~1, SEEK_CUR);
614 Lst_AtEnd(&archives, ar);
617 * Now that the archive has been read and cached, we can look into
618 * the hash table to find the desired member's header.
620 he = Hash_FindEntry(&ar->members, member);
623 return (Hash_GetValue (he));
630 Hash_DeleteTable(&ar->members);
638 *-----------------------------------------------------------------------
640 * Parse an SVR4 style entry that begins with a slash.
641 * If it is "//", then load the table of filenames
642 * If it is "/<offset>", then try to substitute the long file name
643 * from offset of a table previously read.
646 * -1: Bad data in archive
647 * 0: A table was loaded from the file
648 * 1: Name was successfully substituted from table
649 * 2: Name was not successfully substituted from table
652 * If a table is read, the file pointer is moved to the next archive
655 *-----------------------------------------------------------------------
658 ArchSVR4Entry(Arch *ar, char *name, size_t size, FILE *arch)
660 #define ARLONGNAMES1 "//"
661 #define ARLONGNAMES2 "/ARFILENAMES"
665 if (strncmp(name, ARLONGNAMES1, sizeof(ARLONGNAMES1) - 1) == 0 ||
666 strncmp(name, ARLONGNAMES2, sizeof(ARLONGNAMES2) - 1) == 0) {
668 if (ar->fnametab != NULL) {
669 DEBUGF(ARCH, ("Attempted to redefine an SVR4 name table\n"));
674 * This is a table of archive names, so we build one for
677 ar->fnametab = emalloc(size);
678 ar->fnamesize = size;
680 if (fread(ar->fnametab, size, 1, arch) != 1) {
681 DEBUGF(ARCH, ("Reading an SVR4 name table failed\n"));
684 eptr = ar->fnametab + size;
685 for (entry = 0, ptr = ar->fnametab; ptr < eptr; ptr++)
698 DEBUGF(ARCH, ("Found svr4 archive name table with %zu entries\n", entry));
702 if (name[1] == ' ' || name[1] == '\0')
705 entry = (size_t)strtol(&name[1], &eptr, 0);
706 if ((*eptr != ' ' && *eptr != '\0') || eptr == &name[1]) {
707 DEBUGF(ARCH, ("Could not parse SVR4 name %s\n", name));
710 if (entry >= ar->fnamesize) {
711 DEBUGF(ARCH, ("SVR4 entry offset %s is greater than %zu\n",
712 name, ar->fnamesize));
716 DEBUGF(ARCH, ("Replaced %s with %s\n", name, &ar->fnametab[entry]));
718 strncpy(name, &ar->fnametab[entry], MAXPATHLEN);
719 name[MAXPATHLEN - 1] = '\0';
726 *-----------------------------------------------------------------------
728 * Locate a member of an archive, given the path of the archive and
729 * the path of the desired member. If the archive is to be modified,
730 * the mode should be "r+", if not, it should be "r". arhPtr is a
731 * poitner to the header structure to fill in.
734 * An FILE *, opened for reading and writing, positioned at the
735 * start of the member's struct ar_hdr, or NULL if the member was
736 * nonexistent. The current struct ar_hdr for member.
739 * The passed struct ar_hdr structure is filled in.
741 *-----------------------------------------------------------------------
744 ArchFindMember(const char *archive, const char *member, struct ar_hdr *arhPtr, const char *mode)
746 FILE *arch; /* Stream to archive */
747 int size; /* Size of archive member */
748 const char *cp; /* Useful character pointer */
752 arch = fopen(archive, mode);
758 * We use the ARMAG string to make sure this is an archive we
761 if ((fread(magic, SARMAG, 1, arch) != 1) ||
762 (strncmp(magic, ARMAG, SARMAG) != 0)) {
768 * Because of space constraints and similar things, files are archived
769 * using their final path components, not the entire thing, so we need
770 * to point 'member' to the final component, if there is one, to make
771 * the comparisons easier...
773 cp = strrchr(member, '/');
774 if ((cp != NULL) && (strcmp(member, RANLIBMAG) != 0)) {
777 len = tlen = strlen(member);
778 if (len > sizeof(arhPtr->ar_name)) {
779 tlen = sizeof(arhPtr->ar_name);
782 while (fread(arhPtr, sizeof(struct ar_hdr), 1, arch) == 1) {
783 if (strncmp(arhPtr->ar_fmag, ARFMAG, sizeof(arhPtr->ar_fmag) ) != 0) {
785 * The header is bogus, so the archive is bad
786 * and there's no way we can recover...
790 } else if (strncmp(member, arhPtr->ar_name, tlen) == 0) {
792 * If the member's name doesn't take up the entire 'name' field,
793 * we have to be careful of matching prefixes. Names are space-
794 * padded to the right, so if the character in 'name' at the end
795 * of the matched string is anything but a space, this isn't the
798 if (tlen != sizeof(arhPtr->ar_name) && arhPtr->ar_name[tlen] != ' '){
802 * To make life easier, we reposition the file at the start
803 * of the header we just read before we return the stream.
804 * In a more general situation, it might be better to leave
805 * the file at the actual member, rather than its header, but
808 fseek(arch, -sizeof(struct ar_hdr), SEEK_CUR);
814 * BSD 4.4 extended AR format: #1/<namelen>, with name as the
815 * first <namelen> bytes of the file
817 if (strncmp(arhPtr->ar_name, AR_EFMT1,
818 sizeof(AR_EFMT1) - 1) == 0 &&
819 isdigit(arhPtr->ar_name[sizeof(AR_EFMT1) - 1])) {
821 unsigned int elen = atoi(&arhPtr->ar_name[sizeof(AR_EFMT1)-1]);
822 char ename[MAXPATHLEN];
824 if (elen > MAXPATHLEN) {
828 if (fread(ename, elen, 1, arch) != 1) {
836 if (DEBUG(ARCH) || DEBUG(MAKE)) {
837 printf("ArchFind: Extended format entry for %s\n", ename);
839 if (strncmp(ename, member, len) == 0) {
840 /* Found as extended name */
841 fseek(arch, -sizeof(struct ar_hdr) - elen, SEEK_CUR);
844 fseek(arch, -elen, SEEK_CUR);
851 * This isn't the member we're after, so we need to advance the
852 * stream's pointer to the start of the next header. Files are
853 * padded with newlines to an even-byte boundary, so we need to
854 * extract the size of the file from the 'size' field of the
855 * header and round it up during the seek.
857 arhPtr->ar_size[sizeof(arhPtr->ar_size) - 1] = '\0';
858 size = (int)strtol(arhPtr->ar_size, NULL, 10);
859 fseek(arch, (size + 1) & ~1, SEEK_CUR);
864 * We've looked everywhere, but the member is not to be found. Close the
865 * archive and return NULL -- an error.
872 *-----------------------------------------------------------------------
874 * Touch a member of an archive.
877 * The 'time' field of the member's header is updated.
880 * The modification time of the entire archive is also changed.
881 * For a library, this could necessitate the re-ranlib'ing of the
884 *-----------------------------------------------------------------------
887 Arch_Touch(GNode *gn)
889 FILE * arch; /* Stream open to archive, positioned properly */
890 struct ar_hdr arh; /* Current header describing member */
893 arch = ArchFindMember(Var_Value(ARCHIVE, gn, &p1),
894 Var_Value(TARGET, gn, &p2),
898 snprintf(arh.ar_date, sizeof(arh.ar_date), "%-12ld", (long)now);
901 fwrite(&arh, sizeof(struct ar_hdr), 1, arch);
907 *-----------------------------------------------------------------------
909 * Given a node which represents a library, touch the thing, making
910 * sure that the table of contents also is touched.
916 * Both the modification time of the library and of the RANLIBMAG
917 * member are set to 'now'.
919 *-----------------------------------------------------------------------
922 Arch_TouchLib(GNode *gn)
925 FILE *arch; /* Stream open to archive */
926 struct ar_hdr arh; /* Header describing table of contents */
927 struct utimbuf times; /* Times for utime() call */
929 arch = ArchFindMember(gn->path, RANLIBMAG, &arh, "r+");
930 snprintf(arh.ar_date, sizeof(arh.ar_date), "%-12ld", (long) now);
933 fwrite(&arh, sizeof(struct ar_hdr), 1, arch);
936 times.actime = times.modtime = now;
937 utime(gn->path, ×);
943 *-----------------------------------------------------------------------
945 * Return the modification time of a member of an archive, given its
949 * The modification time(seconds).
952 * The mtime field of the given node is filled in with the value
953 * returned by the function.
955 *-----------------------------------------------------------------------
958 Arch_MTime(GNode *gn)
960 struct ar_hdr *arhPtr; /* Header of desired member */
961 int modTime; /* Modification time as an integer */
964 arhPtr = ArchStatMember(Var_Value(ARCHIVE, gn, &p1),
965 Var_Value(TARGET, gn, &p2),
970 if (arhPtr != NULL) {
971 modTime = (int)strtol(arhPtr->ar_date, NULL, 10);
981 *-----------------------------------------------------------------------
983 * Given a non-existent archive member's node, get its modification
984 * time from its archived form, if it exists.
987 * The modification time.
990 * The mtime field is filled in.
992 *-----------------------------------------------------------------------
995 Arch_MemMTime(GNode *gn)
1002 for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Succ(ln)) {
1003 pgn = Lst_Datum(ln);
1005 if (pgn->type & OP_ARCHV) {
1007 * If the parent is an archive specification and is being made
1008 * and its member's name matches the name of the node we were
1009 * given, record the modification time of the parent in the
1010 * child. We keep searching its parents in case some other
1011 * parent requires this child to exist...
1013 nameStart = strchr(pgn->name, '(') + 1;
1014 nameEnd = strchr(nameStart, ')');
1017 strncmp(nameStart, gn->name, nameEnd - nameStart) == 0) {
1018 gn->mtime = Arch_MTime(pgn);
1020 } else if (pgn->make) {
1022 * Something which isn't a library depends on the existence of
1023 * this target, so it needs to exist.
1033 *-----------------------------------------------------------------------
1035 * Search for a named library along the given search path.
1041 * The node's 'path' field is set to the found path (including the
1042 * actual file name, not -l...). If the system can handle the -L
1043 * flag when linking (or we cannot find the library), we assume that
1044 * the user has placed the .LIBRARIES variable in the final linking
1045 * command (or the linker will know where to find it) and set the
1046 * TARGET variable for this node to be the node's name. Otherwise,
1047 * we set the TARGET variable to be the full path of the library,
1048 * as returned by Dir_FindFile.
1050 *-----------------------------------------------------------------------
1053 Arch_FindLib(GNode *gn, Lst *path)
1055 char *libName; /* file name for archive */
1058 sz = strlen(gn->name) + 4;
1059 libName = emalloc(sz);
1060 snprintf(libName, sz, "lib%s.a", &gn->name[2]);
1062 gn->path = Dir_FindFile(libName, path);
1067 Var_Set(TARGET, gn->name, gn);
1069 Var_Set(TARGET, gn->path == NULL ? gn->name : gn->path, gn);
1070 #endif /* LIBRARIES */
1074 *-----------------------------------------------------------------------
1076 * Decide if a node with the OP_LIB attribute is out-of-date. Called
1077 * from Make_OODate to make its life easier, with the library's
1080 * There are several ways for a library to be out-of-date that are
1081 * not available to ordinary files. In addition, there are ways
1082 * that are open to regular files that are not available to
1083 * libraries. A library that is only used as a source is never
1084 * considered out-of-date by itself. This does not preclude the
1085 * library's modification time from making its parent be out-of-date.
1086 * A library will be considered out-of-date for any of these reasons,
1087 * given that it is a target on a dependency line somewhere:
1088 * Its modification time is less than that of one of its
1089 * sources (gn->mtime < gn->cmtime).
1090 * Its modification time is greater than the time at which the
1091 * make began (i.e. it's been modified in the course
1092 * of the make, probably by archiving).
1093 * The modification time of one of its sources is greater than
1094 * the one of its RANLIBMAG member (i.e. its table of contents
1095 * is out-of-date). We don't compare of the archive time
1096 * vs. TOC time because they can be too close. In my
1097 * opinion we should not bother with the TOC at all since
1098 * this is used by 'ar' rules that affect the data contents
1099 * of the archive, not by ranlib rules, which affect the
1103 * TRUE if the library is out-of-date. FALSE otherwise.
1106 * The library will be hashed if it hasn't been already.
1108 *-----------------------------------------------------------------------
1111 Arch_LibOODate(GNode *gn)
1115 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->children)) {
1117 } else if ((gn->mtime > now) || (gn->mtime < gn->cmtime)) {
1121 struct ar_hdr *arhPtr; /* Header for __.SYMDEF */
1122 int modTimeTOC; /* The table-of-contents's mod time */
1124 arhPtr = ArchStatMember(gn->path, RANLIBMAG, FALSE);
1126 if (arhPtr != NULL) {
1127 modTimeTOC = (int)strtol(arhPtr->ar_date, NULL, 10);
1129 /* XXX choose one. */
1130 if (DEBUG(ARCH) || DEBUG(MAKE)) {
1131 printf("%s modified %s...", RANLIBMAG, Targ_FmtTime(modTimeTOC));
1133 oodate = (gn->cmtime > modTimeTOC);
1136 * A library w/o a table of contents is out-of-date
1138 if (DEBUG(ARCH) || DEBUG(MAKE)) {
1139 printf("No t.o.c....");
1144 oodate = (gn->mtime == 0); /* out-of-date if not present */
1151 *-----------------------------------------------------------------------
1153 * Initialize things for this module.
1158 *-----------------------------------------------------------------------