File: [local] / src / usr.bin / make / arch.c (download)
Revision 1.65, Sun Sep 16 11:29:34 2007 UTC (16 years, 8 months ago) by espie
Branch: MAIN
Changes since 1.64: +2 -15 lines
reuse free_hash
|
/* $OpenPackages$ */
/* $OpenBSD: arch.c,v 1.65 2007/09/16 11:29:34 espie Exp $ */
/* $NetBSD: arch.c,v 1.17 1996/11/06 17:58:59 christos Exp $ */
/*
* Copyright (c) 1999,2000 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. 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.
*/
/*
* 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 in a hash (archives) which is searched each time
* an archive member is referenced.
*
*/
#include <sys/param.h>
#include <ar.h>
#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <limits.h>
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ohash.h"
#include "config.h"
#include "defines.h"
#include "dir.h"
#include "direxpand.h"
#include "arch.h"
#include "var.h"
#include "targ.h"
#include "memory.h"
#include "gnode.h"
#include "timestamp.h"
#include "lst.h"
#ifndef PATH_MAX
# ifdef MAXPATHLEN
# define PATH_MAX (MAXPATHLEN+1)
# else
# define PATH_MAX 1024
# endif
#endif
#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(struct ar_hdr *, const char *);
static TIMESTAMP mtime_of_member(struct arch_member *);
static long field2long(const char *, size_t);
static Arch *read_archive(const char *, const char *);
#ifdef CLEANUP
static void ArchFree(Arch *);
#endif
static TIMESTAMP ArchMTimeMember(const char *, const char *, bool);
static FILE *ArchFindMember(const char *, const char *, struct ar_hdr *, const char *);
static void ArchTouch(const char *, const char *);
#if defined(__svr4__) || defined(__SVR4) || \
(defined(__OpenBSD__) && defined(__ELF__))
#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(struct SVR4namelist *, const char *, size_t, FILE *);
#endif
static struct arch_member *
new_arch_member(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. */
ts_set_out_of_date(n->mtime);
return n;
}
static TIMESTAMP
mtime_of_member(struct arch_member *m)
{
if (is_out_of_date(m->mtime))
ts_set_from_time_t((time_t) strtol(m->date, NULL, 10),
m->mtime);
return m->mtime;
}
#ifdef CLEANUP
static void
ArchFree(Arch *a)
{
/* Free memory from hash entries */
free_hash(&a->members);
free(a);
}
#endif
/* Side-effects: Some nodes may be created. */
bool
Arch_ParseArchive(char **linePtr, /* Pointer to start of specification */
Lst nodeLst, /* Lst on which to place the nodes */
SymTable *ctxt) /* Context in which to expand variables */
{
char *cp; /* Pointer into line */
GNode *gn; /* New node */
char *libName; /* Library-part of specification */
char *memberName; /* Member-part of specification */
char nameBuf[MAKE_BSIZE]; /* temporary place for node name */
char saveChar; /* Ending delimiter of member-name */
bool subLibName; /* true if libName should have/had
* variable substitution performed on it */
libName = *linePtr;
subLibName = false;
for (cp = libName; *cp != '(' && *cp != '\0';) {
if (*cp == '$') {
if (!Var_ParseSkip(&cp, ctxt))
return false;
subLibName = true;
} else
cp++;
}
*cp++ = '\0';
if (subLibName)
libName = Var_Subst(libName, ctxt, true);
for (;;) {
/* First skip to the start of the member's name, mark that
* place and skip to the end of it (either white-space or
* a close paren). */
bool doSubst = false; /* true if need to substitute in
* memberName */
while (isspace(*cp))
cp++;
memberName = cp;
while (*cp != '\0' && *cp != ')' && !isspace(*cp)) {
if (*cp == '$') {
if (!Var_ParseSkip(&cp, ctxt))
return false;
doSubst = 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 false;
}
/* If we didn't move anywhere, we must be done. */
if (cp == memberName)
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 *oldMemberName = memberName;
size_t length;
memberName = Var_Subst(memberName, 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. */
length = strlen(memberName)+strlen(libName)+3;
buf = sacrifice = emalloc(length);
snprintf(buf, length, "%s(%s)", libName, memberName);
if (strchr(memberName, '$') &&
strcmp(memberName, oldMemberName) == 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 false;
} else {
gn->type |= OP_ARCHV;
Lst_AtEnd(nodeLst, gn);
}
} else if (!Arch_ParseArchive(&sacrifice, nodeLst,
ctxt)) {
/* Error in nested call -- free buffer and
* return false ourselves. */
free(buf);
return false;
}
/* Free buffer and continue with our work. */
free(buf);
} else if (Dir_HasWildcards(memberName)) {
LIST members;
char *member;
Lst_Init(&members);
Dir_Expand(memberName, dirSearchPath, &members);
while ((member = (char *)Lst_DeQueue(&members))
!= NULL) {
snprintf(nameBuf, MAKE_BSIZE, "%s(%s)",
libName, member);
free(member);
gn = Targ_FindNode(nameBuf, TARG_CREATE);
/* 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);
}
} else {
snprintf(nameBuf, MAKE_BSIZE, "%s(%s)", libName,
memberName);
gn = Targ_FindNode(nameBuf, TARG_CREATE);
/* 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(memberName);
*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 (isspace(*cp));
*linePtr = cp;
return true;
}
/* Helper function: ar fields are not null terminated. */
static long
field2long(const char *field, size_t length)
{
static char enough[32];
assert(length < sizeof(enough));
memcpy(enough, field, length);
enough[length] = '\0';
return strtol(enough, NULL, 10);
}
static Arch *
read_archive(const char *archive, const char *earchive)
{
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, &earchive);
ohash_init(&ar->members, 8, &members_info);
for (;;) {
size_t n;
struct ar_hdr arHeader;
/* Archive-member header for reading archive */
off_t size; /* Size of archive member */
char buffer[PATH_MAX];
char *memberName;
/* Current member name while hashing. */
char *cp;
memberName = buffer;
n = fread(&arHeader, 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(arHeader.ar_fmag, ARFMAG, sizeof(arHeader.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(arHeader.ar_size,
sizeof(arHeader.ar_size));
(void)memcpy(memberName, arHeader.ar_name,
AR_NAME_SIZE);
/* Find real end of name (strip extranous ' ') */
for (cp = memberName + AR_NAME_SIZE - 1; *cp == ' ';)
cp--;
cp[1] = '\0';
#ifdef SVR4ARCHIVES
/* SVR4 names are slash terminated. Also svr4 extended
* AR format.
*/
if (memberName[0] == '/') {
/* SVR4 magic mode. */
memberName = ArchSVR4Entry(&list, memberName,
size, arch);
if (memberName == NULL) /* Invalid data */
break;
else if (memberName == 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(memberName, AR_EFMT1, sizeof(AR_EFMT1) - 1)
== 0 && isdigit(memberName[sizeof(AR_EFMT1) - 1])) {
int elen = atoi(memberName +
sizeof(AR_EFMT1)-1);
if (elen <= 0 || elen >= PATH_MAX)
break;
memberName = buffer;
if (fread(memberName, elen, 1, arch) != 1)
break;
memberName[elen] = '\0';
if (fseek(arch, -elen, SEEK_CUR) != 0)
break;
if (DEBUG(ARCH) || DEBUG(MAKE))
printf("ArchStat: Extended format entry for %s\n",
memberName);
}
#endif
ohash_insert(&ar->members,
ohash_qlookup(&ar->members, memberName),
new_arch_member(&arHeader, memberName));
}
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.
*-----------------------------------------------------------------------
*/
static TIMESTAMP
ArchMTimeMember(
const char *archive, /* Path to the archive */
const char *member, /* Name of member. If it is a path, only the
* last component is used. */
bool hash) /* true if archive should be hashed if not
* already so. */
{
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;
ts_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 arHeader;
arch = ArchFindMember(archive, member, &arHeader, "r");
if (arch != NULL) {
fclose(arch);
ts_set_from_time_t(
(time_t)strtol(arHeader.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 ((size_t)(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 occurred
* extended name
*
* Side-effect:
* For a list of names, store the list in l.
*-----------------------------------------------------------------------
*/
static char *
ArchSVR4Entry(struct SVR4namelist *l, const 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 arHeaderPtr.
*-----------------------------------------------------------------------
*/
static FILE *
ArchFindMember(
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 *arHeaderPtr,/* Pointer to header structure to be filled in */
const char *mode) /* mode for opening the stream */
{
FILE *arch; /* Stream to archive */
char *cp;
char magic[SARMAG];
size_t length;
#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;
length = strlen(member);
if (length >= AR_NAME_SIZE)
length = AR_NAME_SIZE;
/* Error handling is simpler than for read_archive, since we just
* look for a given member. */
while (fread(arHeaderPtr, sizeof(struct ar_hdr), 1, arch) == 1) {
off_t size; /* Size of archive member */
char *memberName;
if (memcmp(arHeaderPtr->ar_fmag, ARFMAG,
sizeof(arHeaderPtr->ar_fmag) ) != 0)
/* The header is bogus, so the archive is bad. */
break;
memberName = arHeaderPtr->ar_name;
if (memcmp(member, memberName, length) == 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 (length < sizeof(arHeaderPtr->ar_name) &&
memberName[length] == '/')
length++;
#endif
if (length == sizeof(arHeaderPtr->ar_name) ||
memberName[length] == ' ') {
#ifdef SVR4ARCHIVES
efree(list.fnametab);
#endif
return arch;
}
}
size = (off_t) field2long(arHeaderPtr->ar_size,
sizeof(arHeaderPtr->ar_size));
#ifdef SVR4ARCHIVES
/* svr4 names are slash terminated. Also svr4 extended AR
* format.
*/
if (memberName[0] == '/') {
/* svr4 magic mode. */
memberName = ArchSVR4Entry(&list,
arHeaderPtr->ar_name, size, arch);
if (memberName == NULL) /* Invalid data */
break;
else if (memberName == svr4list)
/* List of files entry */
continue;
/* Got the entry. */
if (strcmp(memberName, 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(memberName, AR_EFMT1, sizeof(AR_EFMT1) - 1) == 0 &&
isdigit(memberName[sizeof(AR_EFMT1) - 1])) {
char ename[PATH_MAX];
int elength = atoi(memberName + sizeof(AR_EFMT1)-1);
if (elength <= 0 || elength >= PATH_MAX)
break;
if (fread(ename, elength, 1, arch) != 1)
break;
if (fseek(arch, -elength, SEEK_CUR) != 0)
break;
ename[elength] = '\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(const char *archive, const char *member)
{
FILE *arch;
struct ar_hdr arHeader;
arch = ArchFindMember(archive, member, &arHeader, "r+");
if (arch != NULL) {
snprintf(arHeader.ar_date, sizeof(arHeader.ar_date), "%-12ld",
(long) timestamp2time_t(now));
if (fseek(arch, -sizeof(struct ar_hdr), SEEK_CUR) == 0)
(void)fwrite(&arHeader, sizeof(struct ar_hdr), 1, arch);
fclose(arch);
}
}
/*
* 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)
{
ArchTouch(Varq_Value(ARCHIVE_INDEX, gn), Varq_Value(MEMBER_INDEX, gn));
}
/*ARGSUSED*/
void
Arch_TouchLib(GNode *gn UNUSED)
/* ^ Non RANLIBMAG does nothing with it */
{
#ifdef RANLIBMAG
if (gn->path != NULL) {
ArchTouch(gn->path, RANLIBMAG);
set_times(gn->path);
}
#endif
}
TIMESTAMP
Arch_MTime(GNode *gn)
{
gn->mtime = ArchMTimeMember(Varq_Value(ARCHIVE_INDEX, gn),
Varq_Value(MEMBER_INDEX, gn), true);
return gn->mtime;
}
TIMESTAMP
Arch_MemMTime(GNode *gn)
{
LstNode ln;
for (ln = Lst_First(&gn->parents); ln != NULL; ln = Lst_Adv(ln)) {
GNode *pgn;
char *nameStart;
char *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. */
ts_set_out_of_date(gn->mtime);
break;
}
}
return gn->mtime;
}
/* 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, Lst path)
{
char *libName; /* file name for archive */
size_t length = strlen(gn->name) + 6 - 2;
libName = emalloc(length);
snprintf(libName, length, "lib%s.a", &gn->name[2]);
gn->path = Dir_FindFile(libName, path);
free(libName);
Varq_Set(TARGET_INDEX, gn->name, gn);
}
/*-
*-----------------------------------------------------------------------
* 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.
*-----------------------------------------------------------------------
*/
bool
Arch_LibOODate(GNode *gn)
{
#ifdef RANLIBMAG
TIMESTAMP modTimeTOC; /* mod time of __.SYMDEF */
#endif
if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->children))
return false;
if (is_strictly_before(now, gn->mtime) ||
is_strictly_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_strictly_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
}
void
Arch_Init(void)
{
ohash_init(&archives, 4, &arch_info);
}
#ifdef CLEANUP
void
Arch_End(void)
{
Arch *e;
unsigned int i;
for (e = ohash_first(&archives, &i); e != NULL;
e = ohash_next(&archives, &i))
ArchFree(e);
ohash_delete(&archives);
}
#endif
bool
Arch_IsLib(GNode *gn)
{
char buf[SARMAG];
int fd;
if (gn->path == NULL || (fd = open(gn->path, O_RDONLY)) == -1)
return false;
if (read(fd, buf, SARMAG) != SARMAG) {
(void)close(fd);
return false;
}
(void)close(fd);
return memcmp(buf, ARMAG, SARMAG) == 0;
}
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