2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1989 by Berkeley Softworks
7 * This code is derived from software contributed to Berkeley by
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38 * @(#)arch.c 8.2 (Berkeley) 1/2/94
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
46 * Functions to manipulate libraries, archives and their members.
48 * Once again, cacheing/hashing comes into play in the manipulation
49 * of archives. The first time an archive is referenced, all of its members'
50 * headers are read and hashed and the archive closed again. All hashed
51 * archives are kept on a list which is searched each time an archive member
54 * The interface to this module is:
55 * Arch_ParseArchive Given an archive specification, return a list
56 * of GNode's, one for each member in the spec.
57 * FALSE is returned if the specification is
58 * invalid for some reason.
60 * Arch_Touch Alter the modification time of the archive
61 * member described by the given node to be
64 * Arch_TouchLib Update the modification time of the library
65 * described by the given node. This is special
66 * because it also updates the modification time
67 * of the library's table of contents.
69 * Arch_MTime Find the modification time of a member of
70 * an archive *in the archive*. The time is also
71 * placed in the member's GNode. Returns the
74 * Arch_MemTime Find the modification time of a member of
75 * an archive. Called when the member doesn't
76 * already exist. Looks in the archive for the
77 * modification time. Returns the modification
80 * Arch_FindLib Search for a library along a path. The
81 * library name in the GNode should be in
84 * Arch_LibOODate Special function to decide if a library node
87 * Arch_Init Initialize this module.
90 #include <sys/param.h>
91 #include <sys/queue.h>
92 #include <sys/types.h>
117 typedef struct Arch {
118 char *name; /* Name of archive */
121 * All the members of the archive described
122 * by <name, struct ar_hdr *> key/value pairs
126 TAILQ_ENTRY(Arch) link; /* link all cached archives */
129 /* Lst of archives we've already examined */
130 static TAILQ_HEAD(, Arch) archives = TAILQ_HEAD_INITIALIZER(archives);
133 /* size of the name field in the archive member header */
134 #define AR_NAMSIZ sizeof(((struct ar_hdr *)0)->ar_name)
137 * This structure is used while reading/writing an archive
140 FILE *fp; /* archive file */
141 char *fname; /* name of the file */
142 struct ar_hdr hdr; /* current header */
143 char sname[AR_NAMSIZ + 1]; /* short name */
144 char *member; /* (long) member name */
145 size_t mlen; /* size of the above */
146 char *nametab; /* name table */
147 size_t nametablen; /* size of the table */
148 int64_t time; /* from ar_date */
149 uint64_t size; /* from ar_size */
150 off_t pos; /* header pos of current entry */
154 * Name of the symbol table. The original BSD used "__.SYMDEF". Rumours go
155 * that this name may have a slash appended sometimes. Actually FreeBSD
156 * uses "/" which probably came from SVR4.
158 #define SVR4_RANLIBMAG "/"
159 #define BSD_RANLIBMAG "__.SYMDEF"
162 * Name of the filename table. The 4.4BSD ar format did not use this, but
163 * puts long filenames directly between the member header and the object
166 #define SVR4_NAMEMAG "//"
167 #define BSD_NAMEMAG "ARFILENAMES/"
170 * 44BSD long filename key. Use a local define here instead of relying
171 * on ar.h because we want this to continue working even when the
172 * definition is removed from ar.h.
174 #define BSD_EXT1 "#1/"
175 #define BSD_EXT1LEN 3
177 /* if this is TRUE make archive errors fatal */
178 Boolean arch_fatal = TRUE;
182 * An error happend while handling an archive. BSDmake traditionally
183 * ignored these errors. Now this is dependend on the global arch_fatal
184 * which, if true, makes these errors fatal and, if false, just emits an
187 #define ArchError(ARGS) do { \
195 *-----------------------------------------------------------------------
196 * Arch_ParseArchive --
197 * Parse the archive specification in the given line and find/create
198 * the nodes for the specified archive members, placing their nodes
199 * on the given list, given the pointer to the start of the
200 * specification, a Lst on which to place the nodes, and a context
201 * in which to expand variables.
204 * TRUE if it was a valid specification. The linePtr is updated
205 * to point to the first non-space after the archive spec. The
206 * nodes for the members are placed on the given list.
209 * Some nodes may be created. The given list is extended.
211 *-----------------------------------------------------------------------
214 Arch_ParseArchive(char **linePtr, Lst *nodeLst, GNode *ctxt)
216 char *cp; /* Pointer into line */
217 GNode *gn; /* New node */
218 char *libName; /* Library-part of specification */
219 char *memName; /* Member-part of specification */
220 char *nameBuf; /* temporary place for node name */
221 char saveChar; /* Ending delimiter of member-name */
222 Boolean subLibName; /* TRUE if libName should have/had
223 * variable substitution performed on it */
229 for (cp = libName; *cp != '(' && *cp != '\0'; cp++) {
232 * Variable spec, so call the Var module to parse the
233 * puppy so we can safely advance beyond it...
239 result = Var_Parse(cp, ctxt, TRUE, &length, &freeIt);
240 if (result == var_Error) {
254 libName = Buf_Peel(Var_Subst(libName, ctxt, TRUE));
259 * First skip to the start of the member's name, mark that
260 * place and skip to the end of it (either white-space or
265 * TRUE if need to substitute in memName
267 Boolean doSubst = FALSE;
269 while (*cp != '\0' && *cp != ')' &&
270 isspace((unsigned char)*cp)) {
275 while (*cp != '\0' && *cp != ')' &&
276 !isspace((unsigned char)*cp)) {
279 * Variable spec, so call the Var module to
280 * parse the puppy so we can safely advance
287 result = Var_Parse(cp, ctxt, TRUE,
289 if (result == var_Error) {
304 * If the specification ends without a closing parenthesis,
305 * chances are there's something wrong (like a missing
306 * backslash), so it's better to return failure than allow
307 * such things to happen
310 printf("No closing parenthesis in archive "
316 * If we didn't move anywhere, we must be done
326 * XXX: This should be taken care of intelligently by
327 * SuffExpandChildren, both for the archive and the member
331 * If member contains variables, try and substitute for them.
332 * This will slow down archive specs with dynamic sources, of
333 * course, since we'll be (non-)substituting them three times,
334 * but them's the breaks -- we need to do this since
335 * SuffExpandChildren calls us, otherwise we could assume the
336 * thing would be taken care of later.
341 char *oldMemName = memName;
346 * Now form an archive spec and recurse to deal with
347 * nested variables and multi-word variable values....
348 * The results are just placed at the end of the
349 * nodeLst we're returning.
351 buf1 = Var_Subst(memName, ctxt, TRUE);
352 memName = Buf_Data(buf1);
354 sz = strlen(memName) + strlen(libName) + 3;
357 snprintf(buf, sz, "%s(%s)", libName, memName);
361 if (strchr(memName, '$') &&
362 strcmp(memName, oldMemName) == 0) {
364 * Must contain dynamic sources, so we can't
366 * Just create an ARCHV node for the thing and
367 * let SuffExpandChildren handle it...
369 gn = Targ_FindNode(buf, TARG_CREATE);
373 Buf_Destroy(buf1, FALSE);
376 gn->type |= OP_ARCHV;
377 Lst_AtEnd(nodeLst, (void *)gn);
378 } else if (!Arch_ParseArchive(&sacrifice, nodeLst,
381 * Error in nested call -- free buffer and
382 * return FALSE ourselves.
385 Buf_Destroy(buf1, FALSE);
389 /* Free buffer and continue with our work. */
391 Buf_Destroy(buf1, FALSE);
393 } else if (Dir_HasWildcards(memName)) {
394 Lst members = Lst_Initializer(members);
396 size_t sz = MAXPATHLEN;
399 nameBuf = emalloc(sz);
401 Path_Expand(memName, &dirSearchPath, &members);
402 while (!Lst_IsEmpty(&members)) {
403 member = Lst_DeQueue(&members);
404 nsz = strlen(libName) + strlen(member) + 3;
407 nameBuf = erealloc(nameBuf, sz);
410 snprintf(nameBuf, sz, "%s(%s)",
413 gn = Targ_FindNode(nameBuf, TARG_CREATE);
416 /* XXXHB Lst_Destroy(&members) */
420 * We've found the node, but have to make sure
421 * the rest of the world knows it's an archive
422 * member, without having to constantly check
423 * for parentheses, so we type the thing with
424 * the OP_ARCHV bit before we place it on the
425 * end of the provided list.
427 gn->type |= OP_ARCHV;
428 Lst_AtEnd(nodeLst, gn);
432 size_t sz = strlen(libName) + strlen(memName) + 3;
434 nameBuf = emalloc(sz);
435 snprintf(nameBuf, sz, "%s(%s)", libName, memName);
436 gn = Targ_FindNode(nameBuf, TARG_CREATE);
442 * We've found the node, but have to make sure the
443 * rest of the world knows it's an archive member,
444 * without having to constantly check for parentheses,
445 * so we type the thing with the OP_ARCHV bit before
446 * we place it on the end of the provided list.
448 gn->type |= OP_ARCHV;
449 Lst_AtEnd(nodeLst, gn);
459 * If substituted libName, free it now, since we need it no longer.
466 * We promised the pointer would be set up at the next non-space, so
467 * we must advance cp there before setting *linePtr... (note that on
468 * entrance to the loop, cp is guaranteed to point at a ')')
472 } while (*cp != '\0' && isspace((unsigned char)*cp));
479 * Close an archive file an free all resources
482 ArchArchiveClose(struct arfile *ar)
485 if (ar->nametab != NULL)
488 if (ar->fp != NULL) {
489 if (fclose(ar->fp) == EOF)
490 ArchError(("%s: close error", ar->fname));
497 * Open an archive file.
499 static struct arfile *
500 ArchArchiveOpen(const char *archive, const char *mode)
505 ar = emalloc(sizeof(*ar));
506 ar->fname = estrdup(archive);
508 ar->member = emalloc(ar->mlen);
512 if ((ar->fp = fopen(ar->fname, mode)) == NULL) {
513 DEBUGM(ARCH, ("%s", ar->fname));
514 ArchArchiveClose(ar);
519 if (fread(magic, SARMAG, 1, ar->fp) != 1 ||
520 strncmp(magic, ARMAG, SARMAG) != 0) {
521 ArchError(("%s: bad archive magic\n", ar->fname));
522 ArchArchiveClose(ar);
531 * Read the next header from the archive. The return value will be +1 if
532 * the header is read successfully, 0 on EOF and -1 if an error happend.
533 * On a successful return sname contains the truncated member name and
534 * member the full name. hdr contains the member header. For the symbol table
535 * names of length 0 are returned. The entry for the file name table is never
539 ArchArchiveNext(struct arfile *ar)
546 char buf[MAX(sizeof(ar->hdr.ar_size), sizeof(ar->hdr.ar_date)) + 1];
550 * Seek to the next header.
555 ar->pos += sizeof(ar->hdr) + ar->size;
556 if (ar->size % 2 == 1)
560 if (fseeko(ar->fp, ar->pos, SEEK_SET) == -1) {
561 ArchError(("%s: cannot seek to %jd: %s", ar->fname,
562 (intmax_t)ar->pos, strerror(errno)));
567 * Read next member header
569 ret = fread(&ar->hdr, sizeof(ar->hdr), 1, ar->fp);
573 ArchError(("%s: error reading member header: %s", ar->fname,
577 if (strncmp(ar->hdr.ar_fmag, ARFMAG, sizeof(ar->hdr.ar_fmag)) != 0) {
578 ArchError(("%s: bad entry magic", ar->fname));
583 * looks like a member - get name by stripping trailing spaces
584 * and NUL terminating.
586 strncpy(ar->sname, ar->hdr.ar_name, AR_NAMSIZ);
587 ar->sname[AR_NAMSIZ] = '\0';
588 for (ptr = ar->sname + AR_NAMSIZ; ptr > ar->sname; ptr--)
595 * Parse the size. All entries need to have a size. Be careful
596 * to not allow buffer overruns.
598 strncpy(buf, ar->hdr.ar_size, sizeof(ar->hdr.ar_size));
599 buf[sizeof(ar->hdr.ar_size)] = '\0';
602 ar->size = strtoumax(buf, &end, 10);
603 if (errno != 0 || strspn(end, " ") != strlen(end)) {
604 ArchError(("%s: bad size format in archive '%s'",
610 * Look for the extended name table. Do this before parsing
611 * the date because this table doesn't need a date.
613 if (strcmp(ar->sname, BSD_NAMEMAG) == 0 ||
614 strcmp(ar->sname, SVR4_NAMEMAG) == 0) {
615 /* filename table - read it in */
616 ar->nametablen = ar->size;
617 ar->nametab = emalloc(ar->nametablen);
619 ret = fread(ar->nametab, 1, ar->nametablen, ar->fp);
620 if (ret != ar->nametablen) {
621 if (ferror(ar->fp)) {
622 ArchError(("%s: cannot read nametab: %s",
623 ar->fname, strerror(errno)));
625 ArchError(("%s: cannot read nametab: "
626 "short read", ar->fname, strerror(errno)));
632 * NUL terminate the entries. Entries are \n terminated
633 * and may have a trailing / or \.
636 while (ptr < ar->nametab + ar->nametablen) {
638 if (ptr[-1] == '/' || ptr[-1] == '\\')
645 /* get next archive entry */
650 * Now parse the modification date. Be careful to not overrun
653 strncpy(buf, ar->hdr.ar_date, sizeof(ar->hdr.ar_date));
654 buf[sizeof(ar->hdr.ar_date)] = '\0';
657 ar->time = (int64_t)strtoll(buf, &end, 10);
658 if (errno != 0 || strspn(end, " ") != strlen(end)) {
659 ArchError(("%s: bad date format in archive '%s'",
665 * Now check for the symbol table. This should really be the first
666 * entry, but we don't check this.
668 if (strcmp(ar->sname, BSD_RANLIBMAG) == 0 ||
669 strcmp(ar->sname, SVR4_RANLIBMAG) == 0) {
670 /* symbol table - return a zero length name */
671 ar->member[0] = '\0';
679 * Look whether this is a long name. There are several variants
681 * "#1/12 " - 12 length of following filename
682 * "/17 " - index into name table
683 * " 17 " - index into name table
684 * Note that in the last case we must also check that there is no
685 * slash in the name because of filenames with leading spaces:
686 * " 777.o/ " - filename 777.o
688 if (ar->sname[0] == '/' || (ar->sname[0] == ' ' &&
689 strchr(ar->sname, '/') == NULL)) {
690 /* SVR4 extended name */
692 offs = strtoul(ar->sname + 1, &end, 10);
693 if (errno != 0 || *end != '\0' || offs >= ar->nametablen ||
694 end == ar->sname + 1) {
695 ArchError(("%s: bad extended name '%s'", ar->fname,
701 if (ar->mlen <= strlen(ar->nametab + offs)) {
702 ar->mlen = strlen(ar->nametab + offs) + 1;
703 ar->member = erealloc(ar->member, ar->mlen);
705 strcpy(ar->member, ar->nametab + offs);
709 } else if (strncmp(ar->sname, BSD_EXT1, BSD_EXT1LEN) == 0 &&
710 isdigit(ar->sname[BSD_EXT1LEN])) {
711 /* BSD4.4 extended name */
713 offs = strtoul(ar->sname + BSD_EXT1LEN, &end, 10);
714 if (errno != 0 || *end != '\0' ||
715 end == ar->sname + BSD_EXT1LEN) {
716 ArchError(("%s: bad extended name '%s'", ar->fname,
721 /* read it from the archive */
722 if (ar->mlen <= offs) {
724 ar->member = erealloc(ar->member, ar->mlen);
726 ret = fread(ar->member, 1, offs, ar->fp);
728 if (ferror(ar->fp)) {
729 ArchError(("%s: reading extended name: %s",
730 ar->fname, strerror(errno)));
732 ArchError(("%s: reading extended name: "
733 "short read", ar->fname));
737 ar->member[offs] = '\0';
743 * Now remove the trailing slash that Svr4 puts at
744 * the end of the member name to support trailing spaces in names.
746 if (ptr > ar->sname && ptr[-1] == '/')
749 if (!have_long_name) {
750 if (strlen(ar->sname) >= ar->mlen) {
751 ar->mlen = strlen(ar->sname) + 1;
752 ar->member = erealloc(ar->member, ar->mlen);
754 strcpy(ar->member, ar->sname);
761 * Touch the current archive member by writing a new header with an
762 * updated timestamp. The return value is 0 for success and -1 for errors.
765 ArchArchiveTouch(struct arfile *ar, int64_t ts)
768 /* seek to our header */
769 if (fseeko(ar->fp, ar->pos, SEEK_SET) == -1) {
770 ArchError(("%s: cannot seek to %jd: %s", ar->fname,
771 (intmax_t)ar->pos, strerror(errno)));
776 * change timestamp, be sure to not NUL-terminated it, but
777 * to fill with spaces.
779 snprintf(ar->hdr.ar_date, sizeof(ar->hdr.ar_date), "%jd",
781 memset(ar->hdr.ar_date + strlen(ar->hdr.ar_date),
782 ' ', sizeof(ar->hdr.ar_date) - strlen(ar->hdr.ar_date));
784 if (fwrite(&ar->hdr, sizeof(ar->hdr), 1, ar->fp) != 1) {
785 ArchError(("%s: cannot touch: %s", ar->fname, strerror(errno)));
792 *-----------------------------------------------------------------------
794 * Locate a member of an archive, given the path of the archive and
795 * the path of the desired member. If the archive is to be modified,
796 * the mode should be "r+", if not, it should be "r". The archive
797 * file is returned positioned at the correct header.
800 * A struct arfile *, opened for reading and, possibly writing,
801 * positioned at the member's header, or NULL if the member was
804 *-----------------------------------------------------------------------
806 static struct arfile *
807 ArchFindMember(const char *archive, const char *member, const char *mode)
810 const char *cp; /* Useful character pointer */
812 if ((ar = ArchArchiveOpen(archive, mode)) == NULL)
816 * Because of space constraints and similar things, files are archived
817 * using their final path components, not the entire thing, so we need
818 * to point 'member' to the final component, if there is one, to make
819 * the comparisons easier...
821 if (member != NULL) {
822 cp = strrchr(member, '/');
828 while (ArchArchiveNext(ar) > 0) {
830 * When comparing there are actually three cases:
831 * (1) the name fits into the limit og af_name,
832 * (2) the name is longer and the archive supports long names,
833 * (3) the name is longer and the archive doesn't support long
835 * Because we don't know whether the archive supports long
836 * names or not we need to be carefull.
838 if (member == NULL) {
839 /* special case - symbol table */
840 if (ar->member[0] == '\0')
842 } else if (strlen(member) <= AR_NAMSIZ) {
844 if (strcmp(ar->member, member) == 0)
846 } else if (strcmp(ar->member, member) == 0) {
851 if (strlen(ar->member) == AR_NAMSIZ &&
852 strncmp(member, ar->member, AR_NAMSIZ) == 0)
858 ArchArchiveClose(ar);
863 *-----------------------------------------------------------------------
865 * Locate a member of an archive, given the path of the archive and
866 * the path of the desired member, and a boolean representing whether
867 * or not the archive should be hashed (if not already hashed).
870 * A pointer to the current struct ar_hdr structure for the member. Note
871 * That no position is returned, so this is not useful for touching
872 * archive members. This is mostly because we have no assurances that
873 * The archive will remain constant after we read all the headers, so
874 * there's not much point in remembering the position...
878 *-----------------------------------------------------------------------
881 ArchStatMember(const char *archive, const char *member, Boolean hash)
886 char *cp; /* Useful character pointer */
887 Arch *ar; /* Archive descriptor */
888 Hash_Entry *he; /* Entry containing member's description */
889 char copy[AR_NAMSIZ + 1];
892 * Because of space constraints and similar things, files are archived
893 * using their final path components, not the entire thing, so we need
894 * to point 'member' to the final component, if there is one, to make
895 * the comparisons easier...
897 if (member != NULL) {
898 cp = strrchr(member, '/');
903 TAILQ_FOREACH(ar, &archives, link) {
904 if (strcmp(archive, ar->name) == 0)
908 /* archive not found */
911 * Caller doesn't want the thing hashed, just use
912 * ArchFindMember to read the header for the member
913 * out and close down the stream again.
915 arf = ArchFindMember(archive, member, "r");
920 ArchArchiveClose(arf);
925 * We don't have this archive on the list yet, so we want to
926 * find out everything that's in it and cache it so we can get
929 arf = ArchArchiveOpen(archive, "r");
934 /* create archive data structure */
935 ar = emalloc(sizeof(*ar));
936 ar->name = estrdup(archive);
937 Hash_InitTable(&ar->members, -1);
939 while ((t = ArchArchiveNext(arf)) > 0) {
940 he = Hash_CreateEntry(&ar->members, arf->member, NULL);
941 Hash_SetValue(he, emalloc(sizeof(int64_t)));
942 *(int64_t *)Hash_GetValue(he) = arf->time;
945 ArchArchiveClose(arf);
948 /* error happend - throw away everything */
949 Hash_DeleteTable(&ar->members);
955 TAILQ_INSERT_TAIL(&archives, ar, link);
959 * Now that the archive has been read and cached, we can look into
960 * the hash table to find the desired member's header.
962 he = Hash_FindEntry(&ar->members, member);
964 return (*(int64_t *)Hash_GetValue (he));
966 if (member != NULL && strlen(member) > AR_NAMSIZ) {
967 /* Try truncated name */
968 strncpy(copy, member, AR_NAMSIZ);
969 copy[AR_NAMSIZ] = '\0';
971 if ((he = Hash_FindEntry(&ar->members, copy)) != NULL)
972 return (*(int64_t *)Hash_GetValue(he));
979 *-----------------------------------------------------------------------
981 * Touch a member of an archive.
984 * The 'time' field of the member's header is updated.
987 * The modification time of the entire archive is also changed.
988 * For a library, this could necessitate the re-ranlib'ing of the
991 *-----------------------------------------------------------------------
994 Arch_Touch(GNode *gn)
998 ar = ArchFindMember(Var_Value(ARCHIVE, gn),
999 Var_Value(TARGET, gn), "r+");
1002 ArchArchiveTouch(ar, (int64_t)now);
1003 ArchArchiveClose(ar);
1008 *-----------------------------------------------------------------------
1010 * Given a node which represents a library, touch the thing, making
1011 * sure that the table of contents also is touched.
1017 * Both the modification time of the library and of the RANLIBMAG
1018 * member are set to 'now'.
1020 *-----------------------------------------------------------------------
1023 Arch_TouchLib(GNode *gn)
1025 struct arfile *ar; /* Open archive */
1026 struct utimbuf times; /* Times for utime() call */
1028 ar = ArchFindMember(gn->path, NULL, "r+");
1030 ArchArchiveTouch(ar, (int64_t)now);
1031 ArchArchiveClose(ar);
1033 times.actime = times.modtime = now;
1034 utime(gn->path, ×);
1039 *-----------------------------------------------------------------------
1041 * Return the modification time of a member of an archive, given its
1045 * The modification time(seconds).
1046 * XXXHB this should be a long.
1049 * The mtime field of the given node is filled in with the value
1050 * returned by the function.
1052 *-----------------------------------------------------------------------
1055 Arch_MTime(GNode *gn)
1059 mtime = ArchStatMember(Var_Value(ARCHIVE, gn),
1060 Var_Value(TARGET, gn), TRUE);
1062 if (mtime == INT_MIN) {
1065 gn->mtime = (int)mtime; /* XXX */
1070 *-----------------------------------------------------------------------
1072 * Given a non-existent archive member's node, get its modification
1073 * time from its archived form, if it exists.
1076 * The modification time.
1079 * The mtime field is filled in.
1081 *-----------------------------------------------------------------------
1084 Arch_MemMTime(GNode *gn)
1091 for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Succ(ln)) {
1092 pgn = Lst_Datum(ln);
1094 if (pgn->type & OP_ARCHV) {
1096 * If the parent is an archive specification and is
1097 * being made and its member's name matches the name of
1098 * the node we were given, record the modification time
1099 * of the parent in the child. We keep searching its
1100 * parents in case some other parent requires this
1103 nameStart = strchr(pgn->name, '(') + 1;
1104 nameEnd = strchr(nameStart, ')');
1106 if (pgn->make && strncmp(nameStart, gn->name,
1107 nameEnd - nameStart) == 0) {
1108 gn->mtime = Arch_MTime(pgn);
1110 } else if (pgn->make) {
1112 * Something which isn't a library depends on the
1113 * existence of this target, so it needs to exist.
1123 *-----------------------------------------------------------------------
1125 * Search for a named library along the given search path.
1131 * The node's 'path' field is set to the found path (including the
1132 * actual file name, not -l...). If the system can handle the -L
1133 * flag when linking (or we cannot find the library), we assume that
1134 * the user has placed the .LIBRARIES variable in the final linking
1135 * command (or the linker will know where to find it) and set the
1136 * TARGET variable for this node to be the node's name. Otherwise,
1137 * we set the TARGET variable to be the full path of the library,
1138 * as returned by Dir_FindFile.
1140 *-----------------------------------------------------------------------
1143 Arch_FindLib(GNode *gn, struct Path *path)
1145 char *libName; /* file name for archive */
1148 sz = strlen(gn->name) + 4;
1149 libName = emalloc(sz);
1150 snprintf(libName, sz, "lib%s.a", &gn->name[2]);
1152 gn->path = Path_FindFile(libName, path);
1157 Var_Set(TARGET, gn->name, gn);
1159 Var_Set(TARGET, gn->path == NULL ? gn->name : gn->path, gn);
1160 #endif /* LIBRARIES */
1164 *-----------------------------------------------------------------------
1166 * Decide if a node with the OP_LIB attribute is out-of-date. Called
1167 * from Make_OODate to make its life easier, with the library's
1170 * There are several ways for a library to be out-of-date that are
1171 * not available to ordinary files. In addition, there are ways
1172 * that are open to regular files that are not available to
1173 * libraries. A library that is only used as a source is never
1174 * considered out-of-date by itself. This does not preclude the
1175 * library's modification time from making its parent be out-of-date.
1176 * A library will be considered out-of-date for any of these reasons,
1177 * given that it is a target on a dependency line somewhere:
1178 * Its modification time is less than that of one of its
1179 * sources (gn->mtime < gn->cmtime).
1180 * Its modification time is greater than the time at which the
1181 * make began (i.e. it's been modified in the course
1182 * of the make, probably by archiving).
1183 * The modification time of one of its sources is greater than
1184 * the one of its RANLIBMAG member (i.e. its table of contents
1185 * is out-of-date). We don't compare of the archive time
1186 * vs. TOC time because they can be too close. In my
1187 * opinion we should not bother with the TOC at all since
1188 * this is used by 'ar' rules that affect the data contents
1189 * of the archive, not by ranlib rules, which affect the
1193 * TRUE if the library is out-of-date. FALSE otherwise.
1196 * The library will be hashed if it hasn't been already.
1198 *-----------------------------------------------------------------------
1201 Arch_LibOODate(GNode *gn)
1203 int64_t mtime; /* The table-of-contents's mod time */
1205 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->children)) {
1208 if (gn->mtime > now || gn->mtime < gn->cmtime) {
1212 mtime = ArchStatMember(gn->path, NULL, FALSE);
1213 if (mtime == INT64_MIN) {
1215 * Not found. A library w/o a table of contents is out-of-date
1217 if (DEBUG(ARCH) || DEBUG(MAKE)) {
1223 /* XXX choose one. */
1224 if (DEBUG(ARCH) || DEBUG(MAKE)) {
1225 Debug("TOC modified %s...", Targ_FmtTime(mtime));
1227 return (gn->cmtime > mtime);