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freebsd-skq/usr.bin/make/arch.c
Peter Wemm 53faa0dade Revert $FreeBSD$ to $Id$
1997-02-22 19:29:21 +00:00

1235 lines
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/*
* 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.
*
* $Id$
*/
#ifndef lint
static char sccsid[] = "@(#)arch.c 8.2 (Berkeley) 1/2/94";
#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.
*
* Arch_End Cleanup this module.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/param.h>
#include <ctype.h>
#include <ar.h>
#include <utime.h>
#include <stdio.h>
#include <stdlib.h>
#include "make.h"
#include "hash.h"
#include "dir.h"
#include "config.h"
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 <name, struct ar_hdr *> key/value pairs */
char *fnametab; /* Extended name table strings */
size_t fnamesize; /* Size of the string table */
} Arch;
static int ArchFindArchive __P((ClientData, ClientData));
static void ArchFree __P((ClientData));
static struct ar_hdr *ArchStatMember __P((char *, char *, Boolean));
static FILE *ArchFindMember __P((char *, char *, struct ar_hdr *, char *));
#if defined(__svr4__) || defined(__SVR4)
#define SVR4ARCHIVES
static int ArchSVR4Entry __P((Arch *, char *, size_t, FILE *));
#endif
/*-
*-----------------------------------------------------------------------
* 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);
}
/*-
*-----------------------------------------------------------------------
* 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[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 == '$') {
/*
* Variable spec, so call the Var module to parse the puppy
* so we can safely advance beyond it...
*/
int length;
Boolean freeIt;
char *result;
result=Var_Parse(cp, ctxt, TRUE, &length, &freeIt);
if (result == var_Error) {
return(FAILURE);
} else {
subLibName = TRUE;
}
if (freeIt) {
free(result);
}
cp += length-1;
}
}
*cp++ = '\0';
if (subLibName) {
libName = Var_Subst(NULL, libName, ctxt, TRUE);
}
for (;;) {
/*
* First skip to the start of the member's name, mark that
* place and skip to the end of it (either white-space or
* a close paren).
*/
Boolean doSubst = FALSE; /* TRUE if need to substitute in memName */
while (*cp != '\0' && *cp != ')' && isspace (*cp)) {
cp++;
}
memName = cp;
while (*cp != '\0' && *cp != ')' && !isspace (*cp)) {
if (*cp == '$') {
/*
* Variable spec, so call the Var module to parse the puppy
* so we can safely advance beyond it...
*/
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;
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.
*/
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 == 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;
Dir_Expand(memName, dirSearchPath, members);
while (!Lst_IsEmpty(members)) {
member = (char *)Lst_DeQueue(members);
sprintf(nameBuf, "%s(%s)", libName, member);
free(member);
gn = Targ_FindNode (nameBuf, TARG_CREATE);
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);
}
}
Lst_Destroy(members, NOFREE);
} else {
sprintf(nameBuf, "%s(%s)", libName, memName);
gn = Targ_FindNode (nameBuf, TARG_CREATE);
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 (*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/<namelen>, with name as the
* first <namelen> 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, 1);
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, 1);
}
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 "/<offset>", 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 %d entries\n", 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 %d\n",
name, 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), 1);
return (arch);
}
} else
#ifdef AR_EFMT1
/*
* BSD 4.4 extended AR format: #1/<namelen>, with name as the
* first <namelen> 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, 1);
return (arch);
}
fseek (arch, -elen, 1);
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, 1);
}
}
/*
* 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 (TARGET, gn, &p2),
&arh, "r+");
if (p1)
free(p1);
if (p2)
free(p2);
sprintf(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+");
sprintf(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, &times);
}
#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.
*
*-----------------------------------------------------------------------
*/
int
Arch_MTime (gn)
GNode *gn; /* Node describing archive member */
{
struct ar_hdr *arhPtr; /* Header of desired member */
int modTime; /* Modification time as an integer */
char *p1, *p2;
arhPtr = ArchStatMember (Var_Value (ARCHIVE, gn, &p1),
Var_Value (TARGET, gn, &p2),
TRUE);
if (p1)
free(p1);
if (p2)
free(p2);
if (arhPtr != (struct ar_hdr *) NULL) {
modTime = (int) 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.
*
*-----------------------------------------------------------------------
*/
int
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->make &&
strncmp(nameStart, 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.
*/
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 */
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
Var_Set (TARGET, gn->name, gn);
#else
Var_Set (TARGET, gn->path == (char *) 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 */
{
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 {
#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 ()
{
Lst_Destroy(archives, ArchFree);
}
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