/* $NetBSD: arch.c,v 1.33 2001/06/12 23:36:17 sjg Exp $ */ /* * 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. */ #ifdef MAKE_BOOTSTRAP static char rcsid[] = "$NetBSD: arch.c,v 1.33 2001/06/12 23:36:17 sjg Exp $"; #else #include #ifndef lint #if 0 static char sccsid[] = "@(#)arch.c 8.2 (Berkeley) 1/2/94"; #else __RCSID("$NetBSD: arch.c,v 1.33 2001/06/12 23:36:17 sjg Exp $"); #endif #endif /* not lint */ #endif /*- * 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*. The time is also * placed in the member's GNode. Returns the * modification time. * * Arch_MemTime 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 "make.h" #include "hash.h" #include "dir.h" #include "config.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 static Lst archives; /* Lst of archives we've already examined */ typedef struct Arch { char *name; /* Name of archive */ Hash_Table members; /* All the members of the archive described * by key/value pairs */ char *fnametab; /* Extended name table strings */ size_t fnamesize; /* Size of the string table */ } Arch; static int ArchFindArchive __P((ClientData, ClientData)); #ifdef CLEANUP static void ArchFree __P((ClientData)); #endif static struct ar_hdr *ArchStatMember __P((char *, char *, Boolean)); static FILE *ArchFindMember __P((char *, char *, struct ar_hdr *, char *)); #if defined(__svr4__) || defined(__SVR4) || defined(__ELF__) #define SVR4ARCHIVES static int ArchSVR4Entry __P((Arch *, char *, size_t, FILE *)); #endif #ifdef CLEANUP /*- *----------------------------------------------------------------------- * ArchFree -- * Free memory used by an archive * * Results: * None. * * Side Effects: * None. * *----------------------------------------------------------------------- */ static void ArchFree(ap) ClientData ap; { Arch *a = (Arch *) ap; Hash_Search search; Hash_Entry *entry; /* Free memory from hash entries */ for (entry = Hash_EnumFirst(&a->members, &search); entry != (Hash_Entry *)NULL; entry = Hash_EnumNext(&search)) free((Address) Hash_GetValue (entry)); free(a->name); if (a->fnametab) free(a->fnametab); Hash_DeleteTable(&a->members); free((Address) 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 */ GNode *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; /* 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... */ int 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(NULL, 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 ((unsigned char)*cp)) { cp++; } memName = cp; while (*cp != '\0' && *cp != ')' && !isspace ((unsigned char)*cp)) { if (*cp == '$') { /* * Variable spec, so call the Var module to parse the puppy * so we can safely advance beyond it... */ int length; Boolean freeIt; char *result; result=Var_Parse(cp, ctxt, TRUE, &length, &freeIt); if (result == var_Error) { return(FAILURE); } else { doSubst = TRUE; } if (freeIt) { free(result); } cp += length; } else { cp++; } } /* * If the specification ends without a closing parenthesis, * chances are there's something wrong (like a missing backslash), * so it's better to return failure than allow such things to happen */ if (*cp == '\0') { printf("No closing parenthesis in archive specification\n"); return (FAILURE); } /* * If we didn't move anywhere, we must be done */ if (cp == memName) { break; } saveChar = *cp; *cp = '\0'; /* * XXX: This should be taken care of intelligently by * SuffExpandChildren, both for the archive and the member portions. */ /* * If member contains variables, try and substitute for them. * This will slow down archive specs with dynamic sources, of course, * since we'll be (non-)substituting them three times, but them's * the breaks -- we need to do this since SuffExpandChildren calls * us, otherwise we could assume the thing would be taken care of * later. */ if (doSubst) { char *buf; char *sacrifice; char *oldMemName = memName; size_t sz; memName = Var_Subst(NULL, memName, ctxt, TRUE); /* * Now form an archive spec and recurse to deal with nested * variables and multi-word variable values.... The results * are just placed at the end of the nodeLst we're returning. */ sz = strlen(memName)+strlen(libName)+3; buf = sacrifice = emalloc(sz); snprintf(buf, sz, "%s(%s)", libName, memName); if (strchr(memName, '$') && 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 == NILGNODE) { free(buf); return(FAILURE); } else { gn->type |= OP_ARCHV; (void)Lst_AtEnd(nodeLst, (ClientData)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)) { Lst members = Lst_Init(FALSE); char *member; size_t sz = MAXPATHLEN, nsz; nameBuf = emalloc(sz); Dir_Expand(memName, dirSearchPath, members); while (!Lst_IsEmpty(members)) { member = (char *)Lst_DeQueue(members); nsz = strlen(libName) + strlen(member) + 3; if (sz > nsz) nameBuf = erealloc(nameBuf, sz = nsz * 2); snprintf(nameBuf, sz, "%s(%s)", libName, member); free(member); gn = Targ_FindNode (nameBuf, TARG_CREATE); if (gn == NILGNODE) { free(nameBuf); 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; (void) Lst_AtEnd (nodeLst, (ClientData)gn); } } Lst_Destroy(members, NOFREE); free(nameBuf); } else { size_t sz = strlen(libName) + strlen(memName) + 3; nameBuf = emalloc(sz); snprintf(nameBuf, sz, "%s(%s)", libName, memName); gn = Targ_FindNode (nameBuf, TARG_CREATE); free(nameBuf); if (gn == NILGNODE) { 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; (void) Lst_AtEnd (nodeLst, (ClientData)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 ((unsigned char)*cp)); *linePtr = cp; return (SUCCESS); } /*- *----------------------------------------------------------------------- * ArchFindArchive -- * See if the given archive is the one we are looking for. Called * From ArchStatMember and ArchFindMember via Lst_Find. * * Results: * 0 if it is, non-zero if it isn't. * * Side Effects: * None. * *----------------------------------------------------------------------- */ static int ArchFindArchive (ar, archName) ClientData ar; /* Current list element */ ClientData archName; /* Name we want */ { return (strcmp ((char *) archName, ((Arch *) ar)->name)); } /*- *----------------------------------------------------------------------- * ArchStatMember -- * Locate a member of an archive, given the path of the archive and * the path of the desired member. * * Results: * A pointer to the current struct ar_hdr structure for the member. Note * That no position is returned, so this is not useful for touching * archive members. This is mostly because we have no assurances that * The archive will remain constant after we read all the headers, so * there's not much point in remembering the position... * * Side Effects: * *----------------------------------------------------------------------- */ static struct ar_hdr * ArchStatMember (archive, member, hash) char *archive; /* Path to the archive */ 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 */ int size; /* Size of archive member */ char *cp; /* Useful character pointer */ char magic[SARMAG]; LstNode ln; /* Lst member containing archive descriptor */ Arch *ar; /* Archive descriptor */ Hash_Entry *he; /* Entry containing member's description */ struct ar_hdr arh; /* archive-member header for reading archive */ char memName[MAXPATHLEN+1]; /* Current member name while hashing. */ /* * 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 != (char *) NULL) { member = cp + 1; } ln = Lst_Find (archives, (ClientData) archive, ArchFindArchive); if (ln != NILLNODE) { ar = (Arch *) Lst_Datum (ln); he = Hash_FindEntry (&ar->members, member); if (he != (Hash_Entry *) NULL) { return ((struct ar_hdr *) Hash_GetValue (he)); } else { /* Try truncated name */ char copy[AR_MAX_NAME_LEN+1]; int len = strlen (member); if (len > AR_MAX_NAME_LEN) { len = AR_MAX_NAME_LEN; strncpy(copy, member, AR_MAX_NAME_LEN); copy[AR_MAX_NAME_LEN] = '\0'; } if ((he = Hash_FindEntry (&ar->members, copy)) != NULL) return ((struct ar_hdr *) Hash_GetValue (he)); return ((struct ar_hdr *) NULL); } } if (!hash) { /* * Caller doesn't want the thing hashed, just use ArchFindMember * to read the header for the member out and close down the stream * again. Since the archive is not to be hashed, we assume there's * no need to allocate extra room for the header we're returning, * so just declare it static. */ static struct ar_hdr sarh; arch = ArchFindMember(archive, member, &sarh, "r"); if (arch == (FILE *)NULL) { return ((struct ar_hdr *)NULL); } else { fclose(arch); return (&sarh); } } /* * We don't have this archive on the list yet, so we want to find out * everything that's in it and cache it so we can get at it quickly. */ arch = fopen (archive, "r"); if (arch == (FILE *) NULL) { return ((struct ar_hdr *) NULL); } /* * We use the ARMAG string to make sure this is an archive we * can handle... */ if ((fread (magic, SARMAG, 1, arch) != 1) || (strncmp (magic, ARMAG, SARMAG) != 0)) { fclose (arch); return ((struct ar_hdr *) NULL); } ar = (Arch *)emalloc (sizeof (Arch)); ar->name = estrdup (archive); ar->fnametab = NULL; ar->fnamesize = 0; Hash_InitTable (&ar->members, -1); memName[AR_MAX_NAME_LEN] = '\0'; while (fread ((char *)&arh, sizeof (struct ar_hdr), 1, arch) == 1) { if (strncmp ( arh.ar_fmag, ARFMAG, sizeof (arh.ar_fmag)) != 0) { /* * The header is bogus, so the archive is bad * and there's no way we can recover... */ goto badarch; } else { /* * We need to advance the stream's pointer to the start of the * next header. Files are padded with newlines to an even-byte * boundary, so we need to extract the size of the file from the * 'size' field of the header and round it up during the seek. */ arh.ar_size[sizeof(arh.ar_size)-1] = '\0'; size = (int) strtol(arh.ar_size, NULL, 10); (void) strncpy (memName, arh.ar_name, sizeof(arh.ar_name)); for (cp = &memName[AR_MAX_NAME_LEN]; *cp == ' '; cp--) { continue; } cp[1] = '\0'; #ifdef SVR4ARCHIVES /* * svr4 names are slash terminated. Also svr4 extended AR format. */ if (memName[0] == '/') { /* * svr4 magic mode; handle it */ switch (ArchSVR4Entry(ar, memName, size, arch)) { case -1: /* Invalid data */ goto badarch; case 0: /* List of files entry */ continue; default: /* Got the entry */ break; } } 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 (strncmp(memName, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 && isdigit(memName[sizeof(AR_EFMT1) - 1])) { unsigned int elen = atoi(&memName[sizeof(AR_EFMT1)-1]); if (elen > MAXPATHLEN) goto badarch; if (fread (memName, elen, 1, arch) != 1) goto badarch; memName[elen] = '\0'; fseek (arch, -elen, SEEK_CUR); if (DEBUG(ARCH) || DEBUG(MAKE)) { printf("ArchStat: Extended format entry for %s\n", memName); } } #endif he = Hash_CreateEntry (&ar->members, memName, (Boolean *)NULL); Hash_SetValue (he, (ClientData)emalloc (sizeof (struct ar_hdr))); memcpy ((Address)Hash_GetValue (he), (Address)&arh, sizeof (struct ar_hdr)); } fseek (arch, (size + 1) & ~1, SEEK_CUR); } fclose (arch); (void) Lst_AtEnd (archives, (ClientData) ar); /* * Now that the archive has been read and cached, we can look into * the hash table to find the desired member's header. */ he = Hash_FindEntry (&ar->members, member); if (he != (Hash_Entry *) NULL) { return ((struct ar_hdr *) Hash_GetValue (he)); } else { return ((struct ar_hdr *) NULL); } badarch: fclose (arch); Hash_DeleteTable (&ar->members); if (ar->fnametab) free(ar->fnametab); free ((Address)ar); return ((struct ar_hdr *) NULL); } #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: * -1: Bad data in archive * 0: A table was loaded from the file * 1: Name was successfully substituted from table * 2: Name was not successfully substituted from table * * Side Effects: * If a table is read, the file pointer is moved to the next archive * member * *----------------------------------------------------------------------- */ static int ArchSVR4Entry(ar, name, size, arch) Arch *ar; char *name; size_t size; FILE *arch; { #define ARLONGNAMES1 "//" #define ARLONGNAMES2 "/ARFILENAMES" size_t entry; char *ptr, *eptr; if (strncmp(name, ARLONGNAMES1, sizeof(ARLONGNAMES1) - 1) == 0 || strncmp(name, ARLONGNAMES2, sizeof(ARLONGNAMES2) - 1) == 0) { if (ar->fnametab != NULL) { if (DEBUG(ARCH)) { printf("Attempted to redefine an SVR4 name table\n"); } return -1; } /* * This is a table of archive names, so we build one for * ourselves */ ar->fnametab = emalloc(size); ar->fnamesize = size; if (fread(ar->fnametab, size, 1, arch) != 1) { if (DEBUG(ARCH)) { printf("Reading an SVR4 name table failed\n"); } return -1; } eptr = ar->fnametab + size; for (entry = 0, ptr = ar->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 0; } if (name[1] == ' ' || name[1] == '\0') return 2; entry = (size_t) strtol(&name[1], &eptr, 0); if ((*eptr != ' ' && *eptr != '\0') || eptr == &name[1]) { if (DEBUG(ARCH)) { printf("Could not parse SVR4 name %s\n", name); } return 2; } if (entry >= ar->fnamesize) { if (DEBUG(ARCH)) { printf("SVR4 entry offset %s is greater than %lu\n", name, (u_long)ar->fnamesize); } return 2; } if (DEBUG(ARCH)) { printf("Replaced %s with %s\n", name, &ar->fnametab[entry]); } (void) strncpy(name, &ar->fnametab[entry], MAXPATHLEN); name[MAXPATHLEN] = '\0'; return 1; } #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: * An FILE *, opened for reading and writing, positioned at the * start of the member's struct ar_hdr, or NULL if the member was * nonexistent. The current struct ar_hdr for member. * * Side Effects: * The passed struct ar_hdr structure is filled in. * *----------------------------------------------------------------------- */ static FILE * ArchFindMember (archive, member, arhPtr, mode) char *archive; /* Path to the archive */ 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 */ char *mode; /* The mode for opening the stream */ { FILE * arch; /* Stream to archive */ int size; /* Size of archive member */ char *cp; /* Useful character pointer */ char magic[SARMAG]; int len, tlen; arch = fopen (archive, mode); if (arch == (FILE *) NULL) { return ((FILE *) NULL); } /* * We use the ARMAG string to make sure this is an archive we * can handle... */ if ((fread (magic, SARMAG, 1, arch) != 1) || (strncmp (magic, ARMAG, SARMAG) != 0)) { fclose (arch); return ((FILE *) 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 != (char *) NULL) { member = cp + 1; } len = tlen = strlen (member); if (len > sizeof (arhPtr->ar_name)) { tlen = sizeof (arhPtr->ar_name); } while (fread ((char *)arhPtr, sizeof (struct ar_hdr), 1, arch) == 1) { if (strncmp(arhPtr->ar_fmag, ARFMAG, sizeof (arhPtr->ar_fmag) ) != 0) { /* * The header is bogus, so the archive is bad * and there's no way we can recover... */ fclose (arch); return ((FILE *) NULL); } else if (strncmp (member, arhPtr->ar_name, tlen) == 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. */ if (tlen != sizeof(arhPtr->ar_name) && arhPtr->ar_name[tlen] != ' '){ goto skip; } else { /* * To make life easier, we reposition the file at the start * of the header we just read before we return the stream. * In a more general situation, it might be better to leave * the file at the actual member, rather than its header, but * not here... */ fseek (arch, -sizeof(struct ar_hdr), SEEK_CUR); return (arch); } } else #ifdef AR_EFMT1 /* * BSD 4.4 extended AR format: #1/, with name as the * first bytes of the file */ if (strncmp(arhPtr->ar_name, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 && isdigit(arhPtr->ar_name[sizeof(AR_EFMT1) - 1])) { unsigned int elen = atoi(&arhPtr->ar_name[sizeof(AR_EFMT1)-1]); char ename[MAXPATHLEN]; if (elen > MAXPATHLEN) { fclose (arch); return NULL; } if (fread (ename, elen, 1, arch) != 1) { fclose (arch); return NULL; } ename[elen] = '\0'; if (DEBUG(ARCH) || DEBUG(MAKE)) { printf("ArchFind: Extended format entry for %s\n", ename); } if (strncmp(ename, member, len) == 0) { /* Found as extended name */ fseek (arch, -sizeof(struct ar_hdr) - elen, SEEK_CUR); return (arch); } fseek (arch, -elen, SEEK_CUR); goto skip; } else #endif { skip: /* * This isn't the member we're after, so we need to advance the * stream's pointer to the start of the next header. Files are * padded with newlines to an even-byte boundary, so we need to * extract the size of the file from the 'size' field of the * header and round it up during the seek. */ arhPtr->ar_size[sizeof(arhPtr->ar_size)-1] = '\0'; size = (int) strtol(arhPtr->ar_size, NULL, 10); fseek (arch, (size + 1) & ~1, SEEK_CUR); } } /* * We've looked everywhere, but the member is not to be found. Close the * archive and return NULL -- an error. */ fclose (arch); return ((FILE *) NULL); } /*- *----------------------------------------------------------------------- * Arch_Touch -- * Touch a member of an archive. * * Results: * The 'time' field of the member's header is updated. * * 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 (gn) GNode *gn; /* Node of member to touch */ { FILE * arch; /* Stream open to archive, positioned properly */ struct ar_hdr arh; /* Current header describing member */ char *p1, *p2; arch = ArchFindMember(Var_Value (ARCHIVE, gn, &p1), Var_Value (MEMBER, gn, &p2), &arh, "r+"); if (p1) free(p1); if (p2) free(p2); snprintf(arh.ar_date, sizeof(arh.ar_date), "%-12ld", (long) now); if (arch != (FILE *) NULL) { (void)fwrite ((char *)&arh, sizeof (struct ar_hdr), 1, arch); fclose (arch); } } /*- *----------------------------------------------------------------------- * Arch_TouchLib -- * Given a node which represents a library, touch the thing, making * sure that the table of contents also is touched. * * Results: * None. * * Side Effects: * Both 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 FILE * arch; /* Stream open to archive */ struct ar_hdr arh; /* Header describing table of contents */ struct utimbuf times; /* Times for utime() call */ arch = ArchFindMember (gn->path, RANLIBMAG, &arh, "r+"); snprintf(arh.ar_date, sizeof(arh.ar_date), "%-12ld", (long) now); if (arch != (FILE *) NULL) { (void)fwrite ((char *)&arh, sizeof (struct ar_hdr), 1, arch); fclose (arch); times.actime = times.modtime = now; utime(gn->path, ×); } #endif } /*- *----------------------------------------------------------------------- * Arch_MTime -- * Return the modification time of a member of an archive. * * Results: * The modification time (seconds). * * Side Effects: * The mtime field of the given node is filled in with the value * returned by the function. * *----------------------------------------------------------------------- */ time_t Arch_MTime (gn) GNode *gn; /* Node describing archive member */ { struct ar_hdr *arhPtr; /* Header of desired member */ time_t modTime; /* Modification time as an integer */ char *p1, *p2; arhPtr = ArchStatMember (Var_Value (ARCHIVE, gn, &p1), Var_Value (MEMBER, gn, &p2), TRUE); if (p1) free(p1); if (p2) free(p2); if (arhPtr != (struct ar_hdr *) NULL) { modTime = (time_t) strtol(arhPtr->ar_date, NULL, 10); } else { modTime = 0; } gn->mtime = modTime; return (modTime); } /*- *----------------------------------------------------------------------- * Arch_MemMTime -- * Given a non-existent archive member's node, get its modification * time from its archived form, if it exists. * * Results: * The modification time. * * Side Effects: * The mtime field is filled in. * *----------------------------------------------------------------------- */ time_t Arch_MemMTime (gn) GNode *gn; { LstNode ln; GNode *pgn; char *nameStart, *nameEnd; if (Lst_Open (gn->parents) != SUCCESS) { gn->mtime = 0; return (0); } while ((ln = Lst_Next (gn->parents)) != NILLNODE) { 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... */ nameStart = strchr (pgn->name, '(') + 1; nameEnd = strchr (nameStart, ')'); if ((pgn->flags & REMAKE) && strncmp(nameStart, gn->name, nameEnd - nameStart) == 0) { gn->mtime = Arch_MTime(pgn); } } else if (pgn->flags & REMAKE) { /* * Something which isn't a library depends on the existence of * this target, so it needs to exist. */ gn->mtime = 0; break; } } Lst_Close (gn->parents); 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 */ size_t sz = strlen(gn->name) + 6 - 2; libName = (char *)emalloc(sz); snprintf(libName, sz, "lib%s.a", &gn->name[2]); gn->path = Dir_FindFile (libName, path); free (libName); #ifdef LIBRARIES Var_Set (TARGET, gn->name, gn, 0); #else Var_Set (TARGET, gn->path == (char *) NULL ? gn->name : gn->path, gn, 0); #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 */ { Boolean oodate; if (gn->type & OP_PHONY) { oodate = TRUE; } else if (OP_NOP(gn->type) && Lst_IsEmpty(gn->children)) { oodate = FALSE; } else if ((gn->cmtime == 0) || (gn->mtime > now) || (gn->mtime < gn->cmtime)) { oodate = TRUE; } else { #ifdef RANLIBMAG struct ar_hdr *arhPtr; /* Header for __.SYMDEF */ int modTimeTOC; /* The table-of-contents's mod time */ arhPtr = ArchStatMember (gn->path, RANLIBMAG, FALSE); if (arhPtr != (struct ar_hdr *)NULL) { modTimeTOC = (int) strtol(arhPtr->ar_date, NULL, 10); if (DEBUG(ARCH) || DEBUG(MAKE)) { printf("%s modified %s...", RANLIBMAG, Targ_FmtTime(modTimeTOC)); } oodate = (gn->cmtime > modTimeTOC); } else { /* * A library w/o a table of contents is out-of-date */ if (DEBUG(ARCH) || DEBUG(MAKE)) { printf("No t.o.c...."); } oodate = TRUE; } #else oodate = FALSE; #endif } return (oodate); } /*- *----------------------------------------------------------------------- * Arch_Init -- * Initialize things for this module. * * Results: * None. * * Side Effects: * The 'archives' list is initialized. * *----------------------------------------------------------------------- */ void Arch_Init () { archives = Lst_Init (FALSE); } /*- *----------------------------------------------------------------------- * Arch_End -- * Cleanup things for this module. * * Results: * None. * * Side Effects: * The 'archives' list is freed * *----------------------------------------------------------------------- */ void Arch_End () { #ifdef CLEANUP Lst_Destroy(archives, ArchFree); #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; }