/* $OpenBSD: arch.c,v 1.85 2015/01/16 15:36:29 deraadt Exp $ */ /* $NetBSD: arch.c,v 1.17 1996/11/06 17:58:59 christos Exp $ */ /* * Copyright (c) 1999,2000 Marc Espie. * * Extensive code changes for the OpenBSD project. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1988, 1989, 1990, 1993 * The Regents of the University of California. All rights reserved. * Copyright (c) 1989 by Berkeley Softworks * All rights reserved. * * This code is derived from software contributed to Berkeley by * Adam de Boor. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Once again, cacheing/hashing comes into play in the manipulation * of archives. The first time an archive is referenced, all of its members' * headers are read and hashed and the archive closed again. All hashed * archives are kept in a hash (archives) which is searched each time * an archive member is referenced. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include "config.h" #include "defines.h" #include "buf.h" #include "dir.h" #include "direxpand.h" #include "arch.h" #include "var.h" #include "targ.h" #include "memory.h" #include "gnode.h" #include "timestamp.h" #include "lst.h" #ifdef TARGET_MACHINE #undef MACHINE #define MACHINE TARGET_MACHINE #endif #ifdef TARGET_MACHINE_ARCH #undef MACHINE_ARCH #define MACHINE_ARCH TARGET_MACHINE_ARCH #endif #ifdef TARGET_MACHINE_CPU #undef MACHINE_CPU #define MACHINE_CPU TARGET_MACHINE_CPU #endif static struct ohash archives; /* Archives we've already examined. */ typedef struct Arch_ { struct ohash members; /* All the members of this archive, as * struct arch_member entries. */ char name[1]; /* Archive name. */ } Arch; /* Used to get to ar's field sizes. */ static struct ar_hdr *dummy; #define AR_NAME_SIZE (sizeof(dummy->ar_name)) #define AR_DATE_SIZE (sizeof(dummy->ar_date)) /* Each archive member is tied to an arch_member structure, * suitable for hashing. */ struct arch_member { struct timespec mtime; /* Member modification date. */ char date[AR_DATE_SIZE+1]; /* Same, before conversion to numeric * value. */ char name[1]; /* Member name. */ }; static struct ohash_info members_info = { offsetof(struct arch_member, name), NULL, hash_calloc, hash_free, element_alloc }; static struct ohash_info arch_info = { offsetof(Arch, name), NULL, hash_calloc, hash_free, element_alloc }; static struct arch_member *new_arch_member(struct ar_hdr *, const char *); static struct timespec mtime_of_member(struct arch_member *); static long field2long(const char *, size_t); static Arch *read_archive(const char *, const char *); static struct timespec ArchMTimeMember(const char *, const char *, bool); static FILE *ArchFindMember(const char *, const char *, struct ar_hdr *, const char *); static void ArchTouch(const char *, const char *); #if defined(__svr4__) || defined(__SVR4) || \ (defined(__OpenBSD__) && defined(__ELF__)) #define SVR4ARCHIVES #endif static bool parse_archive(Buffer, const char **, Lst, SymTable *); static void add_archive_node(Lst, const char *); struct SVR4namelist { char *fnametab; /* Extended name table strings */ size_t fnamesize; /* Size of the string table */ }; #ifdef SVR4ARCHIVES static const char *svr4list = "Archive list"; static char *ArchSVR4Entry(struct SVR4namelist *, const char *, size_t, FILE *); #endif static struct arch_member * new_arch_member(struct ar_hdr *hdr, const char *name) { const char *end = NULL; struct arch_member *n; n = ohash_create_entry(&members_info, name, &end); /* XXX ar entries are NOT null terminated. */ memcpy(n->date, &(hdr->ar_date), AR_DATE_SIZE); n->date[AR_DATE_SIZE] = '\0'; /* Don't compute mtime before it is needed. */ ts_set_out_of_date(n->mtime); return n; } static struct timespec mtime_of_member(struct arch_member *m) { if (is_out_of_date(m->mtime)) ts_set_from_time_t((time_t) strtoll(m->date, NULL, 10), m->mtime); return m->mtime; } bool Arch_ParseArchive(const char **line, Lst nodes, SymTable *ctxt) { bool result; BUFFER expand; Buf_Init(&expand, MAKE_BSIZE); result = parse_archive(&expand, line, nodes, ctxt); Buf_Destroy(&expand); return result; } static void add_archive_node(Lst nodes, const char *name) { GNode *gn; gn = Targ_FindNode(name, TARG_CREATE); gn->type |= OP_ARCHV; Lst_AtEnd(nodes, gn); } static bool parse_archive(Buffer expand, const char **linePtr, Lst nodeLst, SymTable *ctxt) { const char *cp; /* Pointer into line */ const char *lib; /* Library-part of specification */ const char *elib; const char *member; /* Member-part of specification */ const char *emember; bool subst_lib; /* figure out the library name part */ lib = *linePtr; subst_lib = false; for (cp = lib; *cp != '(' && *cp != '\0';) { if (*cp == '$') { if (!Var_ParseSkip(&cp, ctxt)) return false; subst_lib = true; } else cp++; } elib = cp; if (subst_lib) { lib = Var_Substi(lib, elib, ctxt, true); elib = lib + strlen(lib); } cp++; /* iterate on members, that may be separated by spaces */ for (;;) { /* First skip to the start of the member's name, mark that * place and skip to the end of it (either white-space or * a close paren). */ bool subst_member = false; while (ISSPACE(*cp)) cp++; member = cp; while (*cp != '\0' && *cp != ')' && !ISSPACE(*cp)) { if (*cp == '$') { if (!Var_ParseSkip(&cp, ctxt)) return false; subst_member = true; } else cp++; } /* If the specification ends without a closing parenthesis, * chances are there's something wrong (like a missing * backslash), so it's better to return failure than allow such * things to happen. */ if (*cp == '\0') { printf("No closing parenthesis in archive specification\n"); return false; } /* If we didn't move anywhere, we must be done. */ if (cp == member) break; emember = cp; /* XXX: This should be taken care of intelligently by * SuffExpandChildren, both for the archive and the member * portions. */ /* If member contains variables, try and substitute for them. * This will slow down archive specs with dynamic sources, of * course, since we'll be (non-)substituting them three times, * but them's the breaks -- we need to do this since * SuffExpandChildren calls us, otherwise we could assume the * thing would be taken care of later. */ if (subst_member) { const char *oldMemberName = member; const char *result; member = Var_Substi(member, emember, ctxt, true); /* Now form an archive spec and recurse to deal with * nested variables and multi-word variable values.... * The results are just placed at the end of the * nodeLst we're returning. */ Buf_Addi(expand, lib, elib); Buf_AddChar(expand, '('); Buf_AddString(expand, member); Buf_AddChar(expand, ')'); result = Buf_Retrieve(expand); if (strchr(member, '$') && memcmp(member, oldMemberName, emember - oldMemberName) == 0) { /* Must contain dynamic sources, so we can't * deal with it now. let SuffExpandChildren * handle it later */ add_archive_node(nodeLst, result); } else if (!Arch_ParseArchive(&result, nodeLst, ctxt)) return false; Buf_Reset(expand); } else if (Dir_HasWildcardsi(member, emember)) { LIST members; char *m; Lst_Init(&members); Dir_Expandi(member, emember, defaultPath, &members); while ((m = (char *)Lst_DeQueue(&members)) != NULL) { Buf_Addi(expand, lib, elib); Buf_AddChar(expand, '('); Buf_AddString(expand, m); Buf_AddChar(expand, ')'); free(m); add_archive_node(nodeLst, Buf_Retrieve(expand)); Buf_Reset(expand); } } else { Buf_Addi(expand, lib, elib); Buf_AddChar(expand, '('); Buf_Addi(expand, member, emember); Buf_AddChar(expand, ')'); add_archive_node(nodeLst, Buf_Retrieve(expand)); Buf_Reset(expand); } if (subst_member) free((char *)member); } if (subst_lib) free((char *)lib); /* We promised the pointer would be set up at the next non-space, so * we must advance cp there before setting *linePtr... (note that on * entrance to the loop, cp is guaranteed to point at a ')') */ do { cp++; } while (ISSPACE(*cp)); *linePtr = cp; return true; } /* Helper function: ar fields are not null terminated. */ static long field2long(const char *field, size_t length) { static char enough[32]; assert(length < sizeof(enough)); memcpy(enough, field, length); enough[length] = '\0'; return strtol(enough, NULL, 10); } static Arch * read_archive(const char *archive, const char *earchive) { FILE *arch; /* Stream to archive */ char magic[SARMAG]; Arch *ar; struct SVR4namelist list; list.fnametab = NULL; /* When we encounter an archive for the first time, we read its * whole contents, to place it in the cache. */ arch = fopen(archive, "r"); if (arch == NULL) return NULL; /* Make sure this is an archive we can handle. */ if ((fread(magic, SARMAG, 1, arch) != 1) || (strncmp(magic, ARMAG, SARMAG) != 0)) { fclose(arch); return NULL; } ar = ohash_create_entry(&arch_info, archive, &earchive); ohash_init(&ar->members, 8, &members_info); for (;;) { size_t n; struct ar_hdr arHeader; /* Archive-member header */ off_t size; /* Size of archive member */ char buffer[PATH_MAX]; char *memberName; /* Current member name while hashing. */ char *cp; memberName = buffer; n = fread(&arHeader, 1, sizeof(struct ar_hdr), arch); /* Whole archive read ok. */ if (n == 0 && feof(arch)) { efree(list.fnametab); fclose(arch); return ar; } if (n < sizeof(struct ar_hdr)) break; if (memcmp(arHeader.ar_fmag, ARFMAG, sizeof(arHeader.ar_fmag)) != 0) { /* header is bogus. */ break; } else { /* We need to advance the stream's pointer to the start * of the next header. Records are padded with * newlines to an even-byte boundary, so we need to * extract the size of the record and round it up * during the seek. */ size = (off_t) field2long(arHeader.ar_size, sizeof(arHeader.ar_size)); (void)memcpy(memberName, arHeader.ar_name, AR_NAME_SIZE); /* Find real end of name (strip extranous ' ') */ for (cp = memberName + AR_NAME_SIZE - 1; *cp == ' ';) cp--; cp[1] = '\0'; #ifdef SVR4ARCHIVES /* SVR4 names are slash terminated. Also svr4 extended * AR format. */ if (memberName[0] == '/') { /* SVR4 magic mode. */ memberName = ArchSVR4Entry(&list, memberName, size, arch); if (memberName == NULL) /* Invalid data */ break; else if (memberName == svr4list) /* List of files entry */ continue; /* Got the entry. */ /* XXX this assumes further processing, such as * AR_EFMT1, also applies to SVR4ARCHIVES. */ } else { if (cp[0] == '/') cp[0] = '\0'; } #endif #ifdef AR_EFMT1 /* BSD 4.4 extended AR format: #1/, with name * as the first bytes of the file. */ if (memcmp(memberName, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 && ISDIGIT(memberName[sizeof(AR_EFMT1) - 1])) { int elen = atoi(memberName + sizeof(AR_EFMT1)-1); if (elen <= 0 || elen >= PATH_MAX) break; memberName = buffer; if (fread(memberName, elen, 1, arch) != 1) break; memberName[elen] = '\0'; if (fseek(arch, -elen, SEEK_CUR) != 0) break; if (DEBUG(ARCH) || DEBUG(MAKE)) printf("ArchStat: Extended format entry for %s\n", memberName); } #endif ohash_insert(&ar->members, ohash_qlookup(&ar->members, memberName), new_arch_member(&arHeader, memberName)); } if (fseek(arch, (size + 1) & ~1, SEEK_CUR) != 0) break; } fclose(arch); ohash_delete(&ar->members); efree(list.fnametab); free(ar); return NULL; } /*- *----------------------------------------------------------------------- * ArchMTimeMember -- * Find the modification time of an archive's member, given the * path to the archive and the path to the desired member. * * Results: * The archive member's modification time, or OUT_OF_DATE if member * was not found (convenient, so that missing members are always * out of date). * * Side Effects: * Cache the whole archive contents if hash is true. *----------------------------------------------------------------------- */ static struct timespec ArchMTimeMember( const char *archive, /* Path to the archive */ const char *member, /* Name of member. If it is a path, only the * last component is used. */ bool hash) /* true if archive should be hashed if not * already so. */ { FILE *arch; /* Stream to archive */ Arch *ar; /* Archive descriptor */ unsigned int slot; /* Place of archive in the archives hash */ const char *end = NULL; const char *cp; struct timespec result; ts_set_out_of_date(result); /* Because of space constraints and similar things, files are archived * using their final path components, not the entire thing, so we need * to point 'member' to the final component, if there is one, to make * the comparisons easier... */ cp = strrchr(member, '/'); if (cp != NULL) member = cp + 1; /* Try to find archive in cache. */ slot = ohash_qlookupi(&archives, archive, &end); ar = ohash_find(&archives, slot); /* If not found, get it now. */ if (ar == NULL) { if (!hash) { /* Quick path: no need to hash the whole archive, just * use ArchFindMember to get the member's header and * close the stream again. */ struct ar_hdr arHeader; arch = ArchFindMember(archive, member, &arHeader, "r"); if (arch != NULL) { fclose(arch); ts_set_from_time_t( (time_t)strtol(arHeader.ar_date, NULL, 10), result); } return result; } ar = read_archive(archive, end); if (ar != NULL) ohash_insert(&archives, slot, ar); } /* If archive was found, get entry we seek. */ if (ar != NULL) { struct arch_member *he; end = NULL; he = ohash_find(&ar->members, ohash_qlookupi(&ar->members, member, &end)); if (he != NULL) return mtime_of_member(he); else { if ((size_t)(end - member) > AR_NAME_SIZE) { /* Try truncated name. */ end = member + AR_NAME_SIZE; he = ohash_find(&ar->members, ohash_qlookupi(&ar->members, member, &end)); if (he != NULL) return mtime_of_member(he); } } } return result; } #ifdef SVR4ARCHIVES /*- *----------------------------------------------------------------------- * ArchSVR4Entry -- * Parse an SVR4 style entry that begins with a slash. * If it is "//", then load the table of filenames * If it is "/", then try to substitute the long file name * from offset of a table previously read. * * Results: * svr4list: just read a list of names * NULL: error occurred * extended name * * Side-effect: * For a list of names, store the list in l. *----------------------------------------------------------------------- */ static char * ArchSVR4Entry(struct SVR4namelist *l, const char *name, size_t size, FILE *arch) { #define ARLONGNAMES1 "/" #define ARLONGNAMES2 "ARFILENAMES" size_t entry; char *ptr, *eptr; assert(name[0] == '/'); name++; /* First comes a table of archive names, to be used by subsequent * calls. */ if (memcmp(name, ARLONGNAMES1, sizeof(ARLONGNAMES1) - 1) == 0 || memcmp(name, ARLONGNAMES2, sizeof(ARLONGNAMES2) - 1) == 0) { if (l->fnametab != NULL) { if (DEBUG(ARCH)) printf("Attempted to redefine an SVR4 name table\n"); return NULL; } l->fnametab = emalloc(size); l->fnamesize = size; if (fread(l->fnametab, size, 1, arch) != 1) { if (DEBUG(ARCH)) printf("Reading an SVR4 name table failed\n"); return NULL; } eptr = l->fnametab + size; for (entry = 0, ptr = l->fnametab; ptr < eptr; ptr++) switch (*ptr) { case '/': entry++; *ptr = '\0'; break; case '\n': break; default: break; } if (DEBUG(ARCH)) printf("Found svr4 archive name table with %lu entries\n", (u_long)entry); return (char *)svr4list; } /* Then the names themselves are given as offsets in this table. */ if (*name == ' ' || *name == '\0') return NULL; entry = (size_t) strtol(name, &eptr, 0); if ((*eptr != ' ' && *eptr != '\0') || eptr == name) { if (DEBUG(ARCH)) printf("Could not parse SVR4 name /%s\n", name); return NULL; } if (entry >= l->fnamesize) { if (DEBUG(ARCH)) printf("SVR4 entry offset /%s is greater than %lu\n", name, (u_long)l->fnamesize); return NULL; } if (DEBUG(ARCH)) printf("Replaced /%s with %s\n", name, l->fnametab + entry); return l->fnametab + entry; } #endif /*- *----------------------------------------------------------------------- * ArchFindMember -- * Locate a member of an archive, given the path of the archive and * the path of the desired member. If the archive is to be modified, * the mode should be "r+", if not, it should be "r". * * Results: * A FILE *, opened for reading and writing, positioned right after * the member's header, or NULL if the member was nonexistent. * * Side Effects: * Fill the struct ar_hdr pointed by arHeaderPtr. *----------------------------------------------------------------------- */ static FILE * ArchFindMember( const char *archive, /* Path to the archive */ const char *member, /* Name of member. If it is a path, only the * last component is used. */ struct ar_hdr *arHeaderPtr,/* Pointer to header structure to be filled in */ const char *mode) /* mode for opening the stream */ { FILE * arch; /* Stream to archive */ char *cp; char magic[SARMAG]; size_t length; struct SVR4namelist list; list.fnametab = NULL; arch = fopen(archive, mode); if (arch == NULL) return NULL; /* Make sure this is an archive we can handle. */ if (fread(magic, SARMAG, 1, arch) != 1 || strncmp(magic, ARMAG, SARMAG) != 0) { fclose(arch); return NULL; } /* Because of space constraints and similar things, files are archived * using their final path components, not the entire thing, so we need * to point 'member' to the final component, if there is one, to make * the comparisons easier... */ cp = strrchr(member, '/'); if (cp != NULL) member = cp + 1; length = strlen(member); if (length >= AR_NAME_SIZE) length = AR_NAME_SIZE; /* Error handling is simpler than for read_archive, since we just * look for a given member. */ while (fread(arHeaderPtr, sizeof(struct ar_hdr), 1, arch) == 1) { off_t size; /* Size of archive member */ char *memberName; if (memcmp(arHeaderPtr->ar_fmag, ARFMAG, sizeof(arHeaderPtr->ar_fmag) ) != 0) /* The header is bogus, so the archive is bad. */ break; memberName = arHeaderPtr->ar_name; if (memcmp(member, memberName, length) == 0) { /* If the member's name doesn't take up the entire * 'name' field, we have to be careful of matching * prefixes. Names are space- padded to the right, so * if the character in 'name' at the end of the matched * string is anything but a space, this isn't the * member we sought. */ #ifdef SVR4ARCHIVES if (length < sizeof(arHeaderPtr->ar_name) && memberName[length] == '/') length++; #endif if (length == sizeof(arHeaderPtr->ar_name) || memberName[length] == ' ') { efree(list.fnametab); return arch; } } size = (off_t) field2long(arHeaderPtr->ar_size, sizeof(arHeaderPtr->ar_size)); #ifdef SVR4ARCHIVES /* svr4 names are slash terminated. Also svr4 extended AR * format. */ if (memberName[0] == '/') { /* svr4 magic mode. */ memberName = ArchSVR4Entry(&list, arHeaderPtr->ar_name, size, arch); if (memberName == NULL) /* Invalid data */ break; else if (memberName == svr4list) /* List of files entry */ continue; /* Got the entry. */ if (strcmp(memberName, member) == 0) { efree(list.fnametab); return arch; } } #endif #ifdef AR_EFMT1 /* BSD 4.4 extended AR format: #1/, with name as the * first bytes of the file. */ if (memcmp(memberName, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 && ISDIGIT(memberName[sizeof(AR_EFMT1) - 1])) { char ename[PATH_MAX]; int elength = atoi(memberName + sizeof(AR_EFMT1)-1); if (elength <= 0 || elength >= PATH_MAX) break; if (fread(ename, elength, 1, arch) != 1) break; if (fseek(arch, -elength, SEEK_CUR) != 0) break; ename[elength] = '\0'; if (DEBUG(ARCH) || DEBUG(MAKE)) printf("ArchFind: Extended format entry for %s\n", ename); /* Found as extended name. */ if (strcmp(ename, member) == 0) { efree(list.fnametab); return arch; } } #endif /* This isn't the member we're after, so we need to advance the * stream's pointer to the start of the next header. */ if (fseek(arch, (size + 1) & ~1, SEEK_CUR) != 0) break; } /* We did not find the member, or we ran into an error while reading * the archive. */ #ifdef SVRARCHIVES efree(list.fnametab); #endif fclose(arch); return NULL; } static void ArchTouch(const char *archive, const char *member) { FILE *arch; struct ar_hdr arHeader; arch = ArchFindMember(archive, member, &arHeader, "r+"); if (arch != NULL) { snprintf(arHeader.ar_date, sizeof(arHeader.ar_date), "%-12ld", (long) time(NULL)); if (fseek(arch, -sizeof(struct ar_hdr), SEEK_CUR) == 0) (void)fwrite(&arHeader, sizeof(struct ar_hdr), 1, arch); fclose(arch); } } /* * Side Effects: * The modification time of the entire archive is also changed. * For a library, this could necessitate the re-ranlib'ing of the * whole thing. */ void Arch_Touch(GNode *gn) { ArchTouch(Var(ARCHIVE_INDEX, gn), Var(MEMBER_INDEX, gn)); } struct timespec Arch_MTime(GNode *gn) { gn->mtime = ArchMTimeMember(Var(ARCHIVE_INDEX, gn), Var(MEMBER_INDEX, gn), true); return gn->mtime; } struct timespec Arch_MemMTime(GNode *gn) { LstNode ln; for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Adv(ln)) { GNode *pgn; char *nameStart; char *nameEnd; pgn = (GNode *)Lst_Datum(ln); if (pgn->type & OP_ARCHV) { /* If the parent is an archive specification and is * being made and its member's name matches the name of * the node we were given, record the modification time * of the parent in the child. We keep searching its * parents in case some other parent requires this * child to exist... */ if ((nameStart = strchr(pgn->name, '(') ) != NULL) { nameStart++; nameEnd = strchr(nameStart, ')'); } else nameEnd = NULL; if (pgn->must_make && nameEnd != NULL && strncmp(nameStart, gn->name, nameEnd - nameStart) == 0 && gn->name[nameEnd-nameStart] == '\0') gn->mtime = Arch_MTime(pgn); } else if (pgn->must_make) { /* Something which isn't a library depends on the * existence of this target, so it needs to exist. */ ts_set_out_of_date(gn->mtime); break; } } return gn->mtime; } void Arch_Init(void) { ohash_init(&archives, 4, &arch_info); }