File: [local] / src / usr.bin / make / arch.c (download)
Revision 1.43, Fri Mar 2 16:57:26 2001 UTC (23 years, 2 months ago) by espie
Branch: MAIN
CVS Tags: OPENBSD_2_9_BASE, OPENBSD_2_9
Changes since 1.42: +25 -25 lines
Use the ohash_* that's now in libc.
|
/* $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<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 <stddef.h>
#include <ctype.h>
#include <ar.h>
#include <assert.h>
#include <utime.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#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/<namelen>, with name as the
* first <namelen> 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 "/<offset>", 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/<namelen>, with name as the
* first <namelen> 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[] = "!<arch>\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;
}
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