github.com/Arquivotheca.AIX-4.1.3
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Files
413
Arquivotheca.AIX-4.1.3/bldenv/make/arch.c
seta75D d6fe8fe829 Init
2021-10-11 22:19:34 -03:00

796 lines
24 KiB
C
Raw Permalink Blame History

/*
* COMPONENT_NAME: BLDPROCESS
*
* FUNCTIONS: ArchFindArchive
* ArchFindMember
* ArchStatMember
* Arch_FindLib
* Arch_Init
* Arch_LibOODate
* Arch_MTime
* Arch_MemMTime
* Arch_ParseArchive
* Arch_Touch
* Arch_TouchLib
*
* ORIGINS: 27,71
*
* This module contains IBM CONFIDENTIAL code. -- (IBM
* Confidential Restricted when combined with the aggregated
* modules for this product)
* SOURCE MATERIALS
*
* (C) COPYRIGHT International Business Machines Corp. 1994
* All Rights Reserved
* US Government Users Restricted Rights - Use, duplication or
* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
*/
/*
* @OSF_FREE_COPYRIGHT@
* COPYRIGHT NOTICE
* Copyright (c) 1992, 1991, 1990
* Open Software Foundation, Inc.
*
* Permission is hereby granted to use, copy, modify and freely distribute
* the software in this file and its documentation for any purpose without
* fee, provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation. Further, provided that the name of Open
* Software Foundation, Inc. ("OSF") not be used in advertising or
* publicity pertaining to distribution of the software without prior
* written permission from OSF. OSF makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
/*
* HISTORY
* $Log: arch.c,v $
* Revision 1.3.2.3 1992/12/03 19:04:50 damon
* ODE 2.2 CR 346. Expanded copyright
* [1992/12/03 18:34:46 damon]
*
* Revision 1.3.2.2 1992/09/24 19:23:05 gm
* CR286: Major improvements to make internals.
* [1992/09/24 17:53:11 gm]
*
* Revision 1.3 1991/12/17 20:59:05 devrcs
* Ported to hp300_hpux
* [1991/12/17 14:30:57 damon]
*
* Revision 1.2 1991/12/05 20:41:56 devrcs
* Bug fix to use correct time for oodate archive members.
* [91/05/04 09:55:09 gm]
*
* Changes for Reno make
* [91/03/22 15:41:06 mckeen]
*
* $EndLog$
*/
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
* Copyright (c) 1988, 1989 by Adam de Boor
* 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 are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char rcsid[] = "@(#)arch.c 5.7 (Berkeley) 12/28/90";
#endif /* not lint */
/*-
* 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<name> format.
*
* Arch_LibOODate Special function to decide if a library node
* is out-of-date.
*
* Arch_Init Initialize this module.
*/
#ifndef lint
static char sccsid[] = "@(#)29 1.4 src/bldenv/make/arch.c, bldprocess, bos412, GOLDA411a 1/19/94 16:26:07";
#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <ctype.h>
#include <ar.h>
#include <stdio.h>
#include <utime.h>
#include "make.h"
#include "hash.h"
static Lst archives; /* Lst of archives we've already examined */
typedef struct Arch {
string_t name; /* Name of archive */
Hash_Table members; /* All the members of the archive described
* by <name, struct ar_hdr *> key/value pairs */
} Arch;
FILE *ArchFindMember(string_t, string_t, struct ar_hdr *, const char *);
/*-
*-----------------------------------------------------------------------
* 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 (
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 */
string_t arch, memb;
libName = *linePtr;
for (cp = libName; *cp != '(' && *cp != '\0'; cp++) {
if (*cp == '$') {
/*
* Variable spec, so call the Var module to parse the puppy
* so we can safely advance beyond it...
*/
cp = Var_Skip(cp, ctxt, TRUE);
cp--;
}
}
*cp++ = '\0';
while (1) {
/*
* First skip to the start of the member's name, mark that
* place and skip to the end of it (either white-space or
* a close paren).
*/
while (*cp != '\0' && *cp != ')' && isspace (*cp)) {
cp++;
}
memName = cp;
while (*cp != '\0' && *cp != ')' && !isspace (*cp)) {
if (*cp == '$') {
/*
* Variable spec, so call the Var module to parse the puppy
* so we can safely advance beyond it...
*/
cp = Var_Skip(cp, ctxt, 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 (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.
*/
nameBuf = emalloc(strlen(libName)+strlen(memName)+3);
sprintf(nameBuf, "%s(%s)", libName, memName);
gn = Targ_FindNode (string_create(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.
*/
arch = string_create(libName);
memb = string_create(memName);
gn->type |= OP_ARCHV;
string_archmemb(gn->name, arch, memb);
string_deref(arch);
string_deref(memb);
(void) Lst_AtEnd (nodeLst, (ClientData)gn);
}
*cp = saveChar;
}
/*
* 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 == ' ' || *cp == '\t');
*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(
ClientData ar, /* Current list element */
ClientData archName) /* Name we want */
{
return (((Arch *)ar)->name != (string_t)archName);
}
/*-
*-----------------------------------------------------------------------
* 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:
*
*-----------------------------------------------------------------------
*/
struct ar_hdr *
ArchStatMember (
string_t archive, /* Path to the archive */
string_t 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. */
{
FILE * arch; /* Stream to archive */
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 */
string_t memName; /* Current member name while hashing */
void *hdrInfo; /* machine dependent header info */
int status; /* status from reading archive member */
/*
* 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...
*/
member = string_tail(member);
ArchFixMembName(&member);
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 {
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->data, "r");
if (arch == (FILE *) NULL) {
return ((struct ar_hdr *) NULL);
}
/*
* We use the "magic" string to make sure this is an archive we
* can handle...
*/
if (!ArchReadHdr(arch, &hdrInfo)) {
fclose (arch);
return ((struct ar_hdr *) NULL);
}
ar = (Arch *)emalloc (sizeof (Arch));
ar->name = string_ref (archive);
Hash_InitTable (&ar->members, -1);
while ((status = ArchReadMember(arch, &memName, &arh, hdrInfo)) == 1) {
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));
/*
* 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.
*/
ArchToNextMember(arch, &arh, hdrInfo);
}
fclose (arch);
if (status == -1) {
Hash_DeleteTable (&ar->members);
free ((Address)ar);
return ((struct ar_hdr *) NULL);
}
(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);
}
}
/*-
*-----------------------------------------------------------------------
* 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.
*
*-----------------------------------------------------------------------
*/
FILE *
ArchFindMember (
string_t archive, /* Path to the archive */
string_t 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 */
void *hdrInfo;
int status;
string_t memName;
arch = fopen (archive->data, mode);
if (arch == (FILE *) NULL) {
return ((FILE *) NULL);
}
/*
* We use the "magic" string to make sure this is an archive we
* can handle...
*/
if (!ArchReadHdr(arch, &hdrInfo)) {
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...
*/
member = string_tail(member);
ArchFixMembName(&member);
while ((status = ArchReadMember(arch, &memName, arhPtr, hdrInfo)) == 1) {
if (member == memName) {
/*
* 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...
*/
string_deref (memName);
fseek (arch, -sizeof(struct ar_hdr), 1);
return (arch);
}
/*
* 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.
*/
string_deref (memName);
ArchToNextMember(arch, arhPtr, hdrInfo);
}
/*
* 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 (GNode *gn) /* Node of member to touch */
{
FILE * arch; /* Stream open to archive, positioned properly */
struct ar_hdr arh; /* Current header describing member */
arch = ArchFindMember(Var_StrValue(sARCHIVE, gn),
Var_StrValue(sTARGET, gn),
&arh, "r+");
sprintf(arh.ar_date, "%-12ld", 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 (GNode *gn) /* The node of the library to touch */
{
struct utimbuf times;
ArchTouchTOC(gn);
times.actime = times.modtime = now;
utime(gn->path->data, &times);
}
/*-
*-----------------------------------------------------------------------
* 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.
*
*-----------------------------------------------------------------------
*/
int
Arch_MTime (GNode *gn) /* Node describing archive member */
{
struct ar_hdr *arhPtr; /* Header of desired member */
int modTime; /* Modification time as an integer */
arhPtr = ArchStatMember (Var_StrValue (sARCHIVE, gn),
Var_StrValue (sTARGET, gn),
TRUE);
if (arhPtr != (struct ar_hdr *) NULL) {
(void)sscanf (arhPtr->ar_date, "%12d", &modTime);
} else {
modTime = 0;
}
/*
* If we have made our associated member node, then we want to
* update ourselves to correspond to his time so that our library
* will consider us out-of-date.
*/
if (gn->mtime && gn->cmtime > gn->mtime)
modTime = gn->cmtime;
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.
*
*-----------------------------------------------------------------------
*/
int
Arch_MemMTime (GNode *gn)
{
LstNode ln;
GNode *pgn;
Lst_Open (gn->parents);
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...
*/
if (pgn->make && gn->name == string_memb(pgn->name))
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.
*/
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 (
GNode *gn, /* Node of library to find */
Lst path) /* Search path */
{
char *libName; /* file name for archive */
string_t str;
libName = (char *)emalloc (strlen (gn->name->data) + 6 - 2);
sprintf(libName, "lib%s.a", &gn->name->data[2]);
str = string_create(libName);
free (libName);
gn->path = Dir_FindFile (str, path);
string_deref(str);
#ifdef LIBRARIES
Var_Set (sTARGET, gn->name, gn);
#else
Var_Set (sTARGET,
gn->path == (string_t) 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).
* Its modification time doesn't agree with the modification
* time of its RANLIBMAG member (i.e. its table of contents
* is out-of-date).
*
*
* 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 (GNode *gn) /* The library's graph node */
{
Boolean oodate;
if (OP_NOP(gn->type) && Lst_IsEmpty(gn->children)) {
oodate = FALSE;
} else if ((gn->mtime > now) || (gn->mtime < gn->cmtime)) {
oodate = TRUE;
} else {
ArchTOCTime(gn, &oodate);
}
return (oodate);
}
/*-
*-----------------------------------------------------------------------
* Arch_Init --
* Initialize things for this module.
*
* Results:
* None.
*
* Side Effects:
* The 'archives' list is initialized.
*
*-----------------------------------------------------------------------
*/
void
Arch_Init (void)
{
archives = Lst_Init();
}
Reference in New Issue View Git Blame Copy Permalink