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arch.c
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arch.c
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/* $NetBSD: arch.c,v 1.62 2010/11/27 16:00:09 christos Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. 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.
*/
/*
* 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.
*/
#ifndef MAKE_NATIVE
static char rcsid[] = "$NetBSD: arch.c,v 1.62 2010/11/27 16:00:09 christos Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)arch.c 8.2 (Berkeley) 1/2/94";
#else
__RCSID("$NetBSD: arch.c,v 1.62 2010/11/27 16:00:09 christos Exp $");
#endif
#endif /* not lint */
#endif
/*-
* arch.c --
* Functions to manipulate libraries, archives and their members.
*
* Once again, cacheing/hashing comes into play in the manipulation
* of archives. The first time an archive is referenced, all of its members'
* headers are read and hashed and the archive closed again. All hashed
* archives are kept on a list which is searched each time an archive member
* is referenced.
*
* The interface to this module is:
* Arch_ParseArchive Given an archive specification, return a list
* of GNode's, one for each member in the spec.
* FAILURE is returned if the specification is
* invalid for some reason.
*
* Arch_Touch Alter the modification time of the archive
* member described by the given node to be
* the current time.
*
* Arch_TouchLib Update the modification time of the library
* described by the given node. This is special
* because it also updates the modification time
* of the library's table of contents.
*
* Arch_MTime Find the modification time of a member of
* an archive *in the archive*. The time is also
* placed in the member's GNode. Returns the
* modification time.
*
* Arch_MemTime Find the modification time of a member of
* an archive. Called when the member doesn't
* already exist. Looks in the archive for the
* modification time. Returns the modification
* time.
*
* Arch_FindLib Search for a library along a path. The
* library name in the GNode should be in
* -l<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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/param.h>
#include <ctype.h>
#ifdef HAVE_AR_H
#include <ar.h>
#else
struct ar_hdr {
char ar_name[16]; /* name */
char ar_date[12]; /* modification time */
char ar_uid[6]; /* user id */
char ar_gid[6]; /* group id */
char ar_mode[8]; /* octal file permissions */
char ar_size[10]; /* size in bytes */
#ifndef ARFMAG
#define ARFMAG "`\n"
#endif
char ar_fmag[2]; /* consistency check */
};
#endif
#if defined(HAVE_RANLIB_H) && !(defined(__ELF__) || defined(NO_RANLIB))
#include <ranlib.h>
#endif
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#include "make.h"
#include "hash.h"
#include "dir.h"
#ifdef TARGET_MACHINE
#undef MAKE_MACHINE
#define MAKE_MACHINE TARGET_MACHINE
#endif
#ifdef TARGET_MACHINE_ARCH
#undef MAKE_MACHINE_ARCH
#define MAKE_MACHINE_ARCH TARGET_MACHINE_ARCH
#endif
static Lst archives; /* Lst of archives we've already examined */
typedef struct Arch {
char *name; /* Name of archive */
Hash_Table members; /* All the members of the archive described
* by <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(const void *, const void *);
#ifdef CLEANUP
static void ArchFree(void *);
#endif
static struct ar_hdr *ArchStatMember(char *, char *, Boolean);
static FILE *ArchFindMember(char *, char *, struct ar_hdr *, const char *);
#if defined(__svr4__) || defined(__SVR4) || defined(__ELF__)
#define SVR4ARCHIVES
static int ArchSVR4Entry(Arch *, char *, size_t, FILE *);
#endif
#if defined(_AIX)
# define AR_NAME _ar_name.ar_name
# define AR_FMAG _ar_name.ar_fmag
# define SARMAG SAIAMAG
# define ARMAG AIAMAG
# define ARFMAG AIAFMAG
#endif
#ifndef AR_NAME
# define AR_NAME ar_name
#endif
#ifndef AR_DATE
# define AR_DATE ar_date
#endif
#ifndef AR_SIZE
# define AR_SIZE ar_size
#endif
#ifndef AR_FMAG
# define AR_FMAG ar_fmag
#endif
#ifndef ARMAG
# define ARMAG "!<arch>\n"
#endif
#ifndef SARMAG
# define SARMAG 8
#endif
#define AR_MAX_NAME_LEN (sizeof(arh.AR_NAME)-1)
#ifdef CLEANUP
/*-
*-----------------------------------------------------------------------
* ArchFree --
* Free memory used by an archive
*
* Results:
* None.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static void
ArchFree(void *ap)
{
Arch *a = (Arch *)ap;
Hash_Search search;
Hash_Entry *entry;
/* Free memory from hash entries */
for (entry = Hash_EnumFirst(&a->members, &search);
entry != NULL;
entry = Hash_EnumNext(&search))
free(Hash_GetValue(entry));
free(a->name);
if (a->fnametab)
free(a->fnametab);
Hash_DeleteTable(&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.
*
* Input:
* linePtr Pointer to start of specification
* nodeLst Lst on which to place the nodes
* ctxt Context in which to expand variables
*
* Results:
* SUCCESS if it was a valid specification. The linePtr is updated
* to point to the first non-space after the archive spec. The
* nodes for the members are placed on the given list.
*
* Side Effects:
* Some nodes may be created. The given list is extended.
*
*-----------------------------------------------------------------------
*/
ReturnStatus
Arch_ParseArchive(char **linePtr, Lst nodeLst, GNode *ctxt)
{
char *cp; /* Pointer into line */
GNode *gn; /* New node */
char *libName; /* Library-part of specification */
char *memName; /* Member-part of specification */
char *nameBuf; /* temporary place for node name */
char saveChar; /* Ending delimiter of member-name */
Boolean subLibName; /* TRUE if libName should have/had
* variable substitution performed on it */
libName = *linePtr;
subLibName = FALSE;
for (cp = libName; *cp != '(' && *cp != '\0'; cp++) {
if (*cp == '$') {
/*
* Variable spec, so call the Var module to parse the puppy
* so we can safely advance beyond it...
*/
int length;
void *freeIt;
char *result;
result = Var_Parse(cp, ctxt, TRUE, &length, &freeIt);
if (freeIt)
free(freeIt);
if (result == var_Error) {
return(FAILURE);
} else {
subLibName = TRUE;
}
cp += length-1;
}
}
*cp++ = '\0';
if (subLibName) {
libName = Var_Subst(NULL, libName, ctxt, TRUE);
}
for (;;) {
/*
* First skip to the start of the member's name, mark that
* place and skip to the end of it (either white-space or
* a close paren).
*/
Boolean doSubst = FALSE; /* TRUE if need to substitute in memName */
while (*cp != '\0' && *cp != ')' && isspace ((unsigned char)*cp)) {
cp++;
}
memName = cp;
while (*cp != '\0' && *cp != ')' && !isspace ((unsigned char)*cp)) {
if (*cp == '$') {
/*
* Variable spec, so call the Var module to parse the puppy
* so we can safely advance beyond it...
*/
int length;
void *freeIt;
char *result;
result = Var_Parse(cp, ctxt, TRUE, &length, &freeIt);
if (freeIt)
free(freeIt);
if (result == var_Error) {
return(FAILURE);
} else {
doSubst = TRUE;
}
cp += length;
} else {
cp++;
}
}
/*
* If the specification ends without a closing parenthesis,
* chances are there's something wrong (like a missing backslash),
* so it's better to return failure than allow such things to happen
*/
if (*cp == '\0') {
printf("No closing parenthesis in archive specification\n");
return (FAILURE);
}
/*
* If we didn't move anywhere, we must be done
*/
if (cp == memName) {
break;
}
saveChar = *cp;
*cp = '\0';
/*
* XXX: This should be taken care of intelligently by
* SuffExpandChildren, both for the archive and the member portions.
*/
/*
* If member contains variables, try and substitute for them.
* This will slow down archive specs with dynamic sources, of course,
* since we'll be (non-)substituting them three times, but them's
* the breaks -- we need to do this since SuffExpandChildren calls
* us, otherwise we could assume the thing would be taken care of
* later.
*/
if (doSubst) {
char *buf;
char *sacrifice;
char *oldMemName = memName;
size_t sz;
memName = Var_Subst(NULL, memName, ctxt, TRUE);
/*
* Now form an archive spec and recurse to deal with nested
* variables and multi-word variable values.... The results
* are just placed at the end of the nodeLst we're returning.
*/
sz = strlen(memName)+strlen(libName)+3;
buf = sacrifice = bmake_malloc(sz);
snprintf(buf, sz, "%s(%s)", libName, memName);
if (strchr(memName, '$') && strcmp(memName, oldMemName) == 0) {
/*
* Must contain dynamic sources, so we can't deal with it now.
* Just create an ARCHV node for the thing and let
* SuffExpandChildren handle it...
*/
gn = Targ_FindNode(buf, TARG_CREATE);
if (gn == NULL) {
free(buf);
return(FAILURE);
} else {
gn->type |= OP_ARCHV;
(void)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)) {
Lst members = Lst_Init(FALSE);
char *member;
size_t sz = MAXPATHLEN, nsz;
nameBuf = bmake_malloc(sz);
Dir_Expand(memName, dirSearchPath, members);
while (!Lst_IsEmpty(members)) {
member = (char *)Lst_DeQueue(members);
nsz = strlen(libName) + strlen(member) + 3;
if (sz > nsz)
nameBuf = bmake_realloc(nameBuf, sz = nsz * 2);
snprintf(nameBuf, sz, "%s(%s)", libName, member);
free(member);
gn = Targ_FindNode(nameBuf, TARG_CREATE);
if (gn == NULL) {
free(nameBuf);
return (FAILURE);
} else {
/*
* We've found the node, but have to make sure the rest of
* the world knows it's an archive member, without having
* to constantly check for parentheses, so we type the
* thing with the OP_ARCHV bit before we place it on the
* end of the provided list.
*/
gn->type |= OP_ARCHV;
(void)Lst_AtEnd(nodeLst, gn);
}
}
Lst_Destroy(members, NULL);
free(nameBuf);
} else {
size_t sz = strlen(libName) + strlen(memName) + 3;
nameBuf = bmake_malloc(sz);
snprintf(nameBuf, sz, "%s(%s)", libName, memName);
gn = Targ_FindNode(nameBuf, TARG_CREATE);
free(nameBuf);
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;
(void)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 ((unsigned char)*cp));
*linePtr = cp;
return (SUCCESS);
}
/*-
*-----------------------------------------------------------------------
* ArchFindArchive --
* See if the given archive is the one we are looking for. Called
* From ArchStatMember and ArchFindMember via Lst_Find.
*
* Input:
* ar Current list element
* archName Name we want
*
* Results:
* 0 if it is, non-zero if it isn't.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static int
ArchFindArchive(const void *ar, const void *archName)
{
return (strcmp(archName, ((const Arch *)ar)->name));
}
/*-
*-----------------------------------------------------------------------
* ArchStatMember --
* Locate a member of an archive, given the path of the archive and
* the path of the desired member.
*
* Input:
* archive Path to the archive
* member Name of member. If it is a path, only the last
* component is used.
* hash TRUE if archive should be hashed if not already so.
*
* 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(char *archive, char *member, Boolean hash)
{
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 != NULL) {
member = cp + 1;
}
ln = Lst_Find(archives, archive, ArchFindArchive);
if (ln != NULL) {
ar = (Arch *)Lst_Datum(ln);
he = Hash_FindEntry(&ar->members, member);
if (he != NULL) {
return ((struct ar_hdr *)Hash_GetValue(he));
} else {
/* Try truncated name */
char copy[AR_MAX_NAME_LEN+1];
size_t 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 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 == NULL) {
return 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 == NULL) {
return 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 NULL;
}
ar = bmake_malloc(sizeof(Arch));
ar->name = bmake_strdup(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((unsigned char)memName[sizeof(AR_EFMT1) - 1])) {
unsigned int elen = atoi(&memName[sizeof(AR_EFMT1)-1]);
if (elen > MAXPATHLEN)
goto badarch;
if (fread(memName, elen, 1, arch) != 1)
goto badarch;
memName[elen] = '\0';
fseek(arch, -elen, SEEK_CUR);
if (DEBUG(ARCH) || DEBUG(MAKE)) {
fprintf(debug_file, "ArchStat: Extended format entry for %s\n", memName);
}
}
#endif
he = Hash_CreateEntry(&ar->members, memName, NULL);
Hash_SetValue(he, bmake_malloc(sizeof(struct ar_hdr)));
memcpy(Hash_GetValue(he), &arh, sizeof(struct ar_hdr));
}
fseek(arch, (size + 1) & ~1, SEEK_CUR);
}
fclose(arch);
(void)Lst_AtEnd(archives, 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 != NULL) {
return ((struct ar_hdr *)Hash_GetValue(he));
} else {
return NULL;
}
badarch:
fclose(arch);
Hash_DeleteTable(&ar->members);
if (ar->fnametab)
free(ar->fnametab);
free(ar);
return 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(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)) {
fprintf(debug_file, "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 = bmake_malloc(size);
ar->fnamesize = size;
if (fread(ar->fnametab, size, 1, arch) != 1) {
if (DEBUG(ARCH)) {
fprintf(debug_file, "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)) {
fprintf(debug_file, "Found svr4 archive name table with %lu entries\n",
(u_long)entry);
}
return 0;
}
if (name[1] == ' ' || name[1] == '\0')
return 2;
entry = (size_t)strtol(&name[1], &eptr, 0);
if ((*eptr != ' ' && *eptr != '\0') || eptr == &name[1]) {
if (DEBUG(ARCH)) {
fprintf(debug_file, "Could not parse SVR4 name %s\n", name);
}
return 2;
}
if (entry >= ar->fnamesize) {
if (DEBUG(ARCH)) {
fprintf(debug_file, "SVR4 entry offset %s is greater than %lu\n",
name, (u_long)ar->fnamesize);
}
return 2;
}
if (DEBUG(ARCH)) {
fprintf(debug_file, "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".
*
* Input:
* archive Path to the archive
* member Name of member. If it is a path, only the last
* component is used.
* arhPtr Pointer to header structure to be filled in
* mode The mode for opening the stream
*
* 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(char *archive, char *member, struct ar_hdr *arhPtr,
const char *mode)
{
FILE * arch; /* Stream to archive */
int size; /* Size of archive member */
char *cp; /* Useful character pointer */
char magic[SARMAG];
size_t len, tlen;
arch = fopen(archive, mode);
if (arch == NULL) {
return 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 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 = 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 NULL;
} else if (strncmp(member, arhPtr->AR_NAME, tlen) == 0) {
/*
* If the member's name doesn't take up the entire 'name' field,
* we have to be careful of matching prefixes. Names are space-
* padded to the right, so if the character in 'name' at the end
* of the matched string is anything but a space, this isn't the
* member we sought.
*/
if (tlen != sizeof(arhPtr->AR_NAME) && arhPtr->AR_NAME[tlen] != ' '){
goto skip;
} else {
/*
* To make life easier, we reposition the file at the start
* of the header we just read before we return the stream.
* In a more general situation, it might be better to leave
* the file at the actual member, rather than its header, but
* not here...
*/
fseek(arch, -sizeof(struct ar_hdr), SEEK_CUR);
return (arch);
}
} else
#ifdef AR_EFMT1
/*
* BSD 4.4 extended AR format: #1/<namelen>, with name as the
* first <namelen> bytes of the file
*/
if (strncmp(arhPtr->AR_NAME, AR_EFMT1,
sizeof(AR_EFMT1) - 1) == 0 &&
isdigit((unsigned char)arhPtr->AR_NAME[sizeof(AR_EFMT1) - 1])) {
unsigned int elen = atoi(&arhPtr->AR_NAME[sizeof(AR_EFMT1)-1]);
char ename[MAXPATHLEN + 1];
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)) {
fprintf(debug_file, "ArchFind: Extended format entry for %s\n", ename);
}
if (strncmp(ename, member, len) == 0) {
/* Found as extended name */
fseek(arch, -sizeof(struct ar_hdr) - elen, SEEK_CUR);
return (arch);
}
fseek(arch, -elen, SEEK_CUR);
goto skip;
} else
#endif
{
skip:
/*
* This isn't the member we're after, so we need to advance the