/* $OpenBSD: arch.c,v 1.43 2001/03/02 16:57:26 espie Exp $ */ /* $NetBSD: arch.c,v 1.17 1996/11/06 17:58:59 christos Exp $ */ /* * Copyright (c) 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. */ /*- * arch.c -- * Functions to manipulate libraries, archives and their members. * * 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 on a list which is searched each time an archive member * is referenced. * * The interface to this module is: * Arch_ParseArchive Given an archive specification, return a list * of GNode's, one for each member in the spec. * FAILURE is returned if the specification is * invalid for some reason. * * Arch_Touch Alter the modification time of the archive * member described by the given node to be * the current time. * * Arch_TouchLib Update the modification time of the library * described by the given node. This is special * because it also updates the modification time * of the library's table of contents. * * Arch_MTime Find the modification time of a member of * an archive *in the archive*, return TRUE if * exists. The time is placed in the member's * GNode. Returns the modification time. * * Arch_MemMTime Find the modification time of a member of * an archive. Called when the member doesn't * already exist. Looks in the archive for the * modification time. Returns the modification * time. * * Arch_FindLib Search for a library along a path. The * library name in the GNode should be in * -l format. * * Arch_LibOODate Special function to decide if a library node * is out-of-date. * * Arch_Init Initialize this module. * * Arch_End Cleanup this module. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "make.h" #include "ohash.h" #include "dir.h" #include "config.h" #ifndef lint #if 0 static char sccsid[] = "@(#)arch.c 8.2 (Berkeley) 1/2/94"; #else UNUSED static char rcsid[] = "$OpenBSD: arch.c,v 1.43 2001/03/02 16:57:26 espie Exp $"; #endif #endif /* not lint */ #ifdef TARGET_MACHINE #undef MACHINE #define MACHINE TARGET_MACHINE #endif #ifdef TARGET_MACHINE_ARCH #undef MACHINE_ARCH #define MACHINE_ARCH TARGET_MACHINE_ARCH #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 { TIMESTAMP 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_alloc, hash_free, element_alloc }; static struct ohash_info arch_info = { offsetof(Arch, name), NULL, hash_alloc, hash_free, element_alloc }; static struct arch_member *new_arch_member __P((struct ar_hdr *, const char *)); static TIMESTAMP mtime_of_member __P((struct arch_member *)); static long field2long __P((const char *, size_t)); static Arch *read_archive __P((const char *, const char *)); #ifdef CLEANUP static void ArchFree __P((Arch *)); #endif static TIMESTAMP ArchMTimeMember __P((const char *, const char *, Boolean)); static FILE *ArchFindMember __P((const char *, const char *, struct ar_hdr *, const char *)); static void ArchTouch __P((const char *, const char *)); #if defined(__svr4__) || defined(__SVR4) || \ (defined(__OpenBSD__) && defined(__mips__)) || \ (defined(__OpenBSD__) && defined(__powerpc)) #define SVR4ARCHIVES #endif #ifdef SVR4ARCHIVES struct SVR4namelist { char *fnametab; /* Extended name table strings */ size_t fnamesize; /* Size of the string table */ }; static const char *svr4list = "Archive list"; static char *ArchSVR4Entry __P((struct SVR4namelist *, char *, size_t, FILE *)); #endif static struct arch_member * new_arch_member(hdr, name) 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. */ set_out_of_date(n->mtime); return n; } static TIMESTAMP mtime_of_member(m) struct arch_member *m; { if (is_out_of_date(m->mtime)) grab_date((time_t) strtol(m->date, NULL, 10), m->mtime); return m->mtime; } #ifdef CLEANUP /*- *----------------------------------------------------------------------- * ArchFree -- * Free memory used by an archive *----------------------------------------------------------------------- */ static void ArchFree(ap) Arch *a; { struct arch_member *mem; unsigned int i; /* Free memory from hash entries */ for (mem = ohash_first(&a->members, &i); mem != NULL; mem = ohash_next(&a->members, &i)) free(mem); ohash_delete(&a->members); free(a); } #endif /*- *----------------------------------------------------------------------- * Arch_ParseArchive -- * Parse the archive specification in the given line and find/create * the nodes for the specified archive members, placing their nodes * on the given list. * * Results: * SUCCESS if it was a valid specification. The linePtr is updated * to point to the first non-space after the archive spec. The * nodes for the members are placed on the given list. * * Side Effects: * Some nodes may be created. The given list is extended. * *----------------------------------------------------------------------- */ ReturnStatus Arch_ParseArchive(linePtr, nodeLst, ctxt) char **linePtr; /* Pointer to start of specification */ Lst nodeLst; /* Lst on which to place the nodes */ SymTable *ctxt; /* Context in which to expand variables */ { register char *cp; /* Pointer into line */ GNode *gn; /* New node */ char *libName; /* Library-part of specification */ char *memName; /* Member-part of specification */ char nameBuf[MAKE_BSIZE]; /* temporary place for node name */ char saveChar; /* Ending delimiter of member-name */ Boolean subLibName; /* TRUE if libName should have/had * variable substitution performed on it */ libName = *linePtr; subLibName = FALSE; for (cp = libName; *cp != '(' && *cp != '\0'; cp++) { if (*cp == '$') { /* * Variable spec, so call the Var module to parse the puppy * so we can safely advance beyond it... */ size_t length; Boolean freeIt; char *result; result=Var_Parse(cp, ctxt, TRUE, &length, &freeIt); if (result == var_Error) { return(FAILURE); } else { subLibName = TRUE; } if (freeIt) { free(result); } cp += length-1; } } *cp++ = '\0'; if (subLibName) { libName = Var_Subst(libName, ctxt, TRUE); } 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). */ Boolean doSubst = FALSE; /* TRUE if need to substitute in memName */ while (*cp != '\0' && *cp != ')' && isspace (*cp)) { cp++; } memName = cp; while (*cp != '\0' && *cp != ')' && !isspace (*cp)) { if (*cp == '$') { /* * Variable spec, so call the Var module to parse the puppy * so we can safely advance beyond it... */ size_t length; Boolean freeIt; char *result; result=Var_Parse(cp, ctxt, TRUE, &length, &freeIt); if (result == var_Error) { return(FAILURE); } else { doSubst = TRUE; } if (freeIt) { free(result); } cp += length; } else { cp++; } } /* * If the specification ends without a closing parenthesis, * chances are there's something wrong (like a missing backslash), * so it's better to return failure than allow such things to happen */ if (*cp == '\0') { printf("No closing parenthesis in archive specification\n"); return (FAILURE); } /* * If we didn't move anywhere, we must be done */ if (cp == memName) { break; } saveChar = *cp; *cp = '\0'; /* * XXX: This should be taken care of intelligently by * SuffExpandChildren, both for the archive and the member portions. */ /* * If member contains variables, try and substitute for them. * This will slow down archive specs with dynamic sources, of course, * since we'll be (non-)substituting them three times, but them's * the breaks -- we need to do this since SuffExpandChildren calls * us, otherwise we could assume the thing would be taken care of * later. */ if (doSubst) { char *buf; char *sacrifice; char *oldMemName = memName; memName = Var_Subst(memName, ctxt, TRUE); /* * Now form an archive spec and recurse to deal with nested * variables and multi-word variable values.... The results * are just placed at the end of the nodeLst we're returning. */ buf = sacrifice = emalloc(strlen(memName)+strlen(libName)+3); sprintf(buf, "%s(%s)", libName, memName); if (strchr(memName, '$') && strcmp(memName, oldMemName) == 0) { /* * Must contain dynamic sources, so we can't deal with it now. * Just create an ARCHV node for the thing and let * SuffExpandChildren handle it... */ gn = Targ_FindNode(buf, TARG_CREATE); if (gn == NULL) { free(buf); return(FAILURE); } else { gn->type |= OP_ARCHV; Lst_AtEnd(nodeLst, gn); } } else if (Arch_ParseArchive(&sacrifice, nodeLst, ctxt)!=SUCCESS) { /* * Error in nested call -- free buffer and return FAILURE * ourselves. */ free(buf); return(FAILURE); } /* * Free buffer and continue with our work. */ free(buf); } else if (Dir_HasWildcards(memName)) { LIST members; char *member; Lst_Init(&members); Dir_Expand(memName, &dirSearchPath, &members); while ((member = (char *)Lst_DeQueue(&members)) != NULL) { sprintf(nameBuf, "%s(%s)", libName, member); free(member); gn = Targ_FindNode(nameBuf, TARG_CREATE); if (gn == NULL) return (FAILURE); else { /* * We've found the node, but have to make sure the rest of * the world knows it's an archive member, without having * to constantly check for parentheses, so we type the * thing with the OP_ARCHV bit before we place it on the * end of the provided list. */ gn->type |= OP_ARCHV; Lst_AtEnd(nodeLst, gn); } } Lst_Destroy(&members, NOFREE); } else { sprintf(nameBuf, "%s(%s)", libName, memName); gn = Targ_FindNode (nameBuf, TARG_CREATE); if (gn == NULL) { return (FAILURE); } else { /* * We've found the node, but have to make sure the rest of the * world knows it's an archive member, without having to * constantly check for parentheses, so we type the thing with * the OP_ARCHV bit before we place it on the end of the * provided list. */ gn->type |= OP_ARCHV; Lst_AtEnd(nodeLst, gn); } } if (doSubst) { free(memName); } *cp = saveChar; } /* * If substituted libName, free it now, since we need it no longer. */ if (subLibName) { free(libName); } /* * 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 (*cp != '\0' && isspace (*cp)); *linePtr = cp; return (SUCCESS); } /* Helper function: ar fields are not null terminated. */ static long field2long(field, len) const char *field; size_t len; { static char enough[32]; assert(len < sizeof(enough)); memcpy(enough, field, len); enough[len] = '\0'; return strtol(enough, NULL, 10); } static Arch * read_archive(archive, end) const char *archive; const char *end; { FILE *arch; /* Stream to archive */ char magic[SARMAG]; Arch *ar; #ifdef SVR4ARCHIVES struct SVR4namelist list; list.fnametab = NULL; #endif /* 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, &end); ohash_init(&ar->members, 8, &members_info); for (;;) { size_t n; struct ar_hdr arh; /* Archive-member header for reading archive */ off_t size; /* Size of archive member */ char buffer[MAXPATHLEN+1]; char *memName; /* Current member name while hashing. */ char *cp; /* Useful character pointer */ memName = buffer; n = fread(&arh, 1, sizeof(struct ar_hdr), arch); /* Whole archive read ok. */ if (n == 0 && feof(arch)) { #ifdef SVR4ARCHIVES efree(list.fnametab); #endif fclose(arch); return ar; } if (n < sizeof(struct ar_hdr)) break; if (memcmp(arh.ar_fmag, ARFMAG, sizeof(arh.ar_fmag)) != 0) { /* The 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(arh.ar_size, sizeof(arh.ar_size)); (void)memcpy(memName, arh.ar_name, AR_NAME_SIZE); /* Find real end of name (strip extranous ' ') */ for (cp = memName + AR_NAME_SIZE - 1; *cp == ' ';) cp--; cp[1] = '\0'; #ifdef SVR4ARCHIVES /* SVR4 names are slash terminated. Also svr4 extended AR format. */ if (memName[0] == '/') { /* SVR4 magic mode. */ memName = ArchSVR4Entry(&list, memName, size, arch); if (memName == NULL) /* Invalid data */ break; else if (memName == 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(memName, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 && isdigit(memName[sizeof(AR_EFMT1) - 1])) { int elen = atoi(memName + sizeof(AR_EFMT1)-1); if (elen <= 0 || elen > MAXPATHLEN) break; memName = buffer; if (fread(memName, elen, 1, arch) != 1) break; memName[elen] = '\0'; if (fseek(arch, -elen, SEEK_CUR) != 0) break; if (DEBUG(ARCH) || DEBUG(MAKE)) printf("ArchStat: Extended format entry for %s\n", memName); } #endif ohash_insert(&ar->members, ohash_qlookup(&ar->members, memName), new_arch_member(&arh, memName)); } if (fseek(arch, (size + 1) & ~1, SEEK_CUR) != 0) break; } fclose(arch); ohash_delete(&ar->members); #ifdef SVR4ARCHIVES efree(list.fnametab); #endif 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. * Locate a member of an archive, given the path of the archive and * the path of the desired member. *----------------------------------------------------------------------- */ static TIMESTAMP ArchMTimeMember(archive, member, hash) const char *archive; /* Path to the archive */ const char *member; /* Name of member. If it is a path, only the * last component is used. */ Boolean hash; /* TRUE if archive should be hashed if not * already so. */ { #define AR_MAX_NAME_LEN (sizeof(arh.ar_name)-1) 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; TIMESTAMP result; 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 sarh; arch = ArchFindMember(archive, member, &sarh, "r"); if (arch != NULL) { fclose(arch); grab_date( (time_t)strtol(sarh.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 (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 occured * extended name * * Side-effect: * For a list of names, store the list in l. *----------------------------------------------------------------------- */ static char * ArchSVR4Entry(l, name, size, arch) struct SVR4namelist *l; 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 arhPtr. * *----------------------------------------------------------------------- */ static FILE * ArchFindMember(archive, member, arhPtr, mode) 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 *arhPtr; /* Pointer to header structure to be filled in */ const char *mode; /* The mode for opening the stream */ { FILE * arch; /* Stream to archive */ char *cp; /* Useful character pointer */ char magic[SARMAG]; size_t len; #ifdef SVR4ARCHIVES struct SVR4namelist list; list.fnametab = NULL; #endif 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; len = strlen(member); if (len >= AR_NAME_SIZE) len = AR_NAME_SIZE; /* Error handling is simpler than for read_archive, since we just * look for a given member. */ while (fread(arhPtr, sizeof(struct ar_hdr), 1, arch) == 1) { off_t size; /* Size of archive member */ char *memName; if (memcmp(arhPtr->ar_fmag, ARFMAG, sizeof(arhPtr->ar_fmag) ) != 0) /* The header is bogus, so the archive is bad. */ break; memName = arhPtr->ar_name; if (memcmp(member, memName, len) == 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 (len < sizeof(arhPtr->ar_name) && memName[len] == '/') len++; #endif if (len == sizeof(arhPtr->ar_name) || memName[len] == ' ') { #ifdef SVR4ARCHIVES efree(list.fnametab); #endif return arch; } } size = (off_t) field2long(arhPtr->ar_size, sizeof(arhPtr->ar_size)); #ifdef SVR4ARCHIVES /* svr4 names are slash terminated. Also svr4 extended AR format. */ if (memName[0] == '/') { /* svr4 magic mode. */ memName = ArchSVR4Entry(&list, arhPtr->ar_name, size, arch); if (memName == NULL) /* Invalid data */ break; else if (memName == svr4list) /* List of files entry */ continue; /* Got the entry. */ if (strcmp(memName, 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(memName, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 && isdigit(memName[sizeof(AR_EFMT1) - 1])) { char ename[MAXPATHLEN+1]; int elen = atoi(memName + sizeof(AR_EFMT1)-1); if (elen <= 0 || elen > MAXPATHLEN) break; if (fread(ename, elen, 1, arch) != 1) break; if (fseek(arch, -elen, SEEK_CUR) != 0) break; ename[elen] = '\0'; if (DEBUG(ARCH) || DEBUG(MAKE)) printf("ArchFind: Extended format entry for %s\n", ename); /* Found as extended name. */ if (strcmp(ename, member) == 0) { #ifdef SVR4ARCHIVES efree(list.fnametab); #endif 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(archive, member) const char *archive; /* Path to the archive */ const char *member; /* Name of member. */ { FILE *arch; struct ar_hdr arh; arch = ArchFindMember(archive, member, &arh, "r+"); if (arch != NULL) { snprintf(arh.ar_date, sizeof(arh.ar_date), "%-12ld", (long) timestamp2time_t(now)); if (fseek(arch, -sizeof(struct ar_hdr), SEEK_CUR) == 0) (void)fwrite(&arh, sizeof(struct ar_hdr), 1, arch); fclose(arch); } } /*- *----------------------------------------------------------------------- * Arch_Touch -- * Touch a member of an archive. * * Side Effects: * The 'time' field of the member's header is updated. * 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(gn) GNode *gn; /* Node of member to touch */ { ArchTouch(Varq_Value(ARCHIVE_INDEX, gn), Varq_Value(MEMBER_INDEX, gn)); } /*- *----------------------------------------------------------------------- * Arch_TouchLib -- * Given a node which represents a library, touch the thing, making * sure that the table of contents also is touched. * * Side Effects: * The modification time of the library and of the RANLIBMAG * member are set to 'now'. * *----------------------------------------------------------------------- */ void Arch_TouchLib(gn) GNode *gn; /* The node of the library to touch */ { #ifdef RANLIBMAG if (gn->path != NULL) { ArchTouch(gn->path, RANLIBMAG); set_times(gn->path); } #endif } /*- *----------------------------------------------------------------------- * Arch_MTime -- * Return the modification time of a member of an archive. * * Results: * The modification time. * * Side Effects: * The mtime field of the given node is filled in with the value * returned by the function. *----------------------------------------------------------------------- */ TIMESTAMP Arch_MTime(gn) GNode *gn; /* Node describing archive member */ { gn->mtime = ArchMTimeMember(Varq_Value(ARCHIVE_INDEX, gn), Varq_Value(MEMBER_INDEX, gn), TRUE); return gn->mtime; } /*- *----------------------------------------------------------------------- * Arch_MemMTime -- * Given a non-existent archive member's node, get its modification * time from its archived form, if it exists. * *----------------------------------------------------------------------- */ TIMESTAMP Arch_MemMTime (gn) GNode *gn; { LstNode ln; for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Adv(ln)) { GNode *pgn; char *nameStart, *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->make && nameEnd != NULL && strncmp(nameStart, gn->name, nameEnd - nameStart) == 0 && gn->name[nameEnd-nameStart] == '\0') gn->mtime = Arch_MTime(pgn); } else if (pgn->make) { /* Something which isn't a library depends on the existence of * this target, so it needs to exist. */ set_out_of_date(gn->mtime); break; } } return gn->mtime; } /*- *----------------------------------------------------------------------- * Arch_FindLib -- * Search for a library along the given search path. * * Results: * None. * * Side Effects: * The node's 'path' field is set to the found path (including the * actual file name, not -l...). If the system can handle the -L * flag when linking (or we cannot find the library), we assume that * the user has placed the .LIBRARIES variable in the final linking * command (or the linker will know where to find it) and set the * TARGET variable for this node to be the node's name. Otherwise, * we set the TARGET variable to be the full path of the library, * as returned by Dir_FindFile. * *----------------------------------------------------------------------- */ void Arch_FindLib (gn, path) GNode *gn; /* Node of library to find */ Lst path; /* Search path */ { char *libName; /* file name for archive */ libName = (char *)emalloc (strlen (gn->name) + 6 - 2); sprintf(libName, "lib%s.a", &gn->name[2]); gn->path = Dir_FindFile (libName, path); free (libName); #ifdef LIBRARIES Varq_Set(TARGET_INDEX, gn->name, gn); #else Varq_Set(TARGET_INDEX, gn->path == NULL ? gn->name : gn->path, gn); #endif /* LIBRARIES */ } /*- *----------------------------------------------------------------------- * Arch_LibOODate -- * Decide if a node with the OP_LIB attribute is out-of-date. Called * from Make_OODate to make its life easier. * * There are several ways for a library to be out-of-date that are * not available to ordinary files. In addition, there are ways * that are open to regular files that are not available to * libraries. A library that is only used as a source is never * considered out-of-date by itself. This does not preclude the * library's modification time from making its parent be out-of-date. * A library will be considered out-of-date for any of these reasons, * given that it is a target on a dependency line somewhere: * Its modification time is less than that of one of its * sources (gn->mtime < gn->cmtime). * Its modification time is greater than the time at which the * make began (i.e. it's been modified in the course * of the make, probably by archiving). * The modification time of one of its sources is greater than * the one of its RANLIBMAG member (i.e. its table of contents * is out-of-date). We don't compare of the archive time * vs. TOC time because they can be too close. In my * opinion we should not bother with the TOC at all since * this is used by 'ar' rules that affect the data contents * of the archive, not by ranlib rules, which affect the * TOC. * * Results: * TRUE if the library is out-of-date. FALSE otherwise. * * Side Effects: * The library will be hashed if it hasn't been already. * *----------------------------------------------------------------------- */ Boolean Arch_LibOODate (gn) GNode *gn; /* The library's graph node */ { TIMESTAMP modTimeTOC; /* mod time of __.SYMDEF */ if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->children)) return FALSE; if (is_before(now, gn->mtime) || is_before(gn->mtime, gn->cmtime) || is_out_of_date(gn->mtime)) return TRUE; #ifdef RANLIBMAG /* non existent libraries are always out-of-date. */ if (gn->path == NULL) return TRUE; modTimeTOC = ArchMTimeMember(gn->path, RANLIBMAG, FALSE); if (!is_out_of_date(modTimeTOC)) { if (DEBUG(ARCH) || DEBUG(MAKE)) printf("%s modified %s...", RANLIBMAG, Targ_FmtTime(modTimeTOC)); return is_before(modTimeTOC, gn->cmtime); } /* A library w/o a table of contents is out-of-date */ if (DEBUG(ARCH) || DEBUG(MAKE)) printf("No t.o.c...."); return TRUE; #else return FALSE; #endif } /*- *----------------------------------------------------------------------- * Arch_Init -- * Initialize things for this module. * * Side Effects: * The 'archives' hash is initialized. *----------------------------------------------------------------------- */ void Arch_Init() { ohash_init(&archives, 4, &arch_info); } /*- *----------------------------------------------------------------------- * Arch_End -- * Cleanup things for this module. * * Side Effects: * The 'archives' hash is freed *----------------------------------------------------------------------- */ void Arch_End () { #ifdef CLEANUP Arch *e; unsigned int i; for (e = ohash_first(&archives, &i); e != NULL; e = ohash_next(&archives, &i)) ArchFree(e); ohash_delete(&archives); #endif } /*- *----------------------------------------------------------------------- * Arch_IsLib -- * Check if the node is a library * * Results: * True or False. * * Side Effects: * None. * *----------------------------------------------------------------------- */ int Arch_IsLib(gn) GNode *gn; { static const char armag[] = "!\n"; char buf[sizeof(armag)-1]; int fd; if ((fd = open(gn->path, O_RDONLY)) == -1) return FALSE; if (read(fd, buf, sizeof(buf)) != sizeof(buf)) { (void) close(fd); return FALSE; } (void) close(fd); return memcmp(buf, armag, sizeof(buf)) == 0; }