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rar2fs.c
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rar2fs.c
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/*
Copyright (C) 2009 Hans Beckerus (hans.beckerus#AT#gmail.com)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
This program take use of the freeware "Unrar C++ Library" (libunrar)
by Alexander Roshal and some extensions to it.
Unrar source may be used in any software to handle RAR archives
without limitations free of charge, but cannot be used to re-create
the RAR compression algorithm, which is proprietary. Distribution
of modified Unrar source in separate form or as a part of other
software is permitted, provided that it is clearly stated in
the documentation and source comments that the code may not be used
to develop a RAR (WinRAR) compatible archiver.
*/
#include <platform.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/select.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <libgen.h>
#include <fuse.h>
#include <fcntl.h>
#include <getopt.h>
#include <syslog.h>
#include <wchar.h>
#ifdef HAVE_LOCALE_H
# include <locale.h>
#endif
#ifdef HAVE_MMAP
# include <sys/mman.h>
#endif
#include <limits.h>
#include <pthread.h>
#include <ctype.h>
#ifdef HAVE_SCHED_H
# include <sched.h>
#endif
#ifdef HAVE_SYS_XATTR_H
# include <sys/xattr.h>
#endif
#ifdef HAVE_SYS_SYSMACROS_H
# include <sys/sysmacros.h>
#endif
#ifdef HAVE_ICONV
#include <iconv.h>
#endif
#include <assert.h>
#include "version.h"
#include "debug.h"
#include "index.h"
#include "dllwrapper.h"
#include "filecache.h"
#include "dircache.h"
#include "iobuffer.h"
#include "optdb.h"
#include "sighandler.h"
#include "dirlist.h"
#include "rarconfig.h"
#define MOUNT_FOLDER 0
#define MOUNT_ARCHIVE 1
#define RD_IDLE 0
#define RD_WAKEUP 1
#define RD_SYNC_NOREAD 2
#define RD_SYNC_READ 3
#define RD_READ_ASYNC 4
struct volume_handle {
FILE *fp;
off_t pos;
};
struct io_context {
FILE* fp;
off_t pos;
struct iob *buf;
pid_t pid;
unsigned int seq;
short vno;
short vno_max;
struct filecache_entry *entry_p;
struct volume_handle *volh;
pthread_t thread;
pthread_mutex_t rd_req_mutex;
pthread_cond_t rd_req_cond;
int rd_req;
/* debug */
#ifdef DEBUG_READ
FILE *dbg_fp;
#endif
};
struct io_handle {
int type;
#define IO_TYPE_NRM 0
#define IO_TYPE_RAR 1
#define IO_TYPE_RAW 2
#define IO_TYPE_ISO 3
#define IO_TYPE_INFO 4
#define IO_TYPE_DIR 5
union {
struct io_context *context; /* type = IO_TYPE_RAR/IO_TYPE_RAW */
int fd; /* type = IO_TYPE_NRM/IO_TYPE_ISO */
DIR *dp; /* type = IO_TYPE_DIR */
void *buf_p; /* type = IO_TYPE_INFO */
uintptr_t bits;
} u;
struct filecache_entry *entry_p; /* type = IO_TYPE_ISO */
char *path; /* type = all */
};
#define FH_ZERO(fh) ((fh) = 0)
#define FH_ISSET(fh) (fh)
#define FH_SETCONTEXT(fh, v) (FH_TOIO(fh)->u.context = (v))
#define FH_SETFD(fh, v) (FH_TOIO(fh)->u.fd = (v))
#define FH_SETDP(fh, v) (FH_TOIO(fh)->u.dp = (v))
#define FH_SETBUF(fh, v) (FH_TOIO(fh)->u.buf_p = (v))
#define FH_SETIO(fh, v) ((fh) = (uintptr_t)(v))
#define FH_SETENTRY(fh, v) (FH_TOIO(fh)->entry_p = (v))
#define FH_SETPATH(fh, v) (FH_TOIO(fh)->path = (v))
#define FH_SETTYPE(fh, v) (FH_TOIO(fh)->type = (v))
#define FH_TOCONTEXT(fh) (FH_TOIO(fh)->u.context)
#define FH_TOFD(fh) (FH_TOIO(fh)->u.fd)
#define FH_TODP(fh) (FH_TOIO(fh)->u.dp)
#define FH_TOBUF(fh) (FH_TOIO(fh)->u.buf_p)
#define FH_TOENTRY(fh) (FH_TOIO(fh)->entry_p)
#define FH_TOPATH(fh) (FH_TOIO(fh)->path)
#define FH_TOIO(fh) ((struct io_handle*)(uintptr_t)(fh))
/* Special DIR pointer for root folder in a file system loop. */
#define FS_LOOP_ROOT_DP ((DIR *)~0U)
#ifdef HAVE_ICONV
static iconv_t icd;
#endif
static long page_size_ = 0;
static int mount_type;
static struct dir_entry_list arch_list_root; /* internal list root */
static struct dir_entry_list *arch_list = &arch_list_root;
static pthread_attr_t thread_attr;
static unsigned int rar2_ticks;
static int fs_terminated = 0;
static int fs_loop = 0;
static char *fs_loop_mp_root = NULL;
static char *fs_loop_mp_base = NULL;
static size_t fs_loop_mp_base_len = 0;
static struct stat fs_loop_mp_stat;
static int64_t blkdev_size = -1;
static mode_t umask_ = 0022;
#define P_ALIGN_(a) (((a)+page_size_)&~(page_size_-1))
static int extract_rar(char *arch, const char *file, void *arg);
static int get_vformat(const char *s, int t, int *l, int *p);
static int CALLBACK list_callback_noswitch(UINT, LPARAM UserData, LPARAM, LPARAM);
static int CALLBACK list_callback(UINT, LPARAM UserData, LPARAM, LPARAM);
struct eof_cb_arg {
off_t toff;
off_t coff;
size_t size;
int fd;
char *arch;
};
struct extract_cb_arg {
char *arch;
void *arg;
};
static int extract_index(const char *, const struct filecache_entry *, off_t);
static int preload_index(struct iob *, const char *);
#if RARVER_MAJOR > 4
static const char *file_cmd[] = {
"#info",
NULL
};
#endif
#define IS_UNIX_MODE_(l) \
((l)->UnpVer >= 50 \
? (l)->HostOS == HOST_UNIX \
: (l)->HostOS == HOST_UNIX || (l)->HostOS == HOST_BEOS)
#define IS_RAR_DIR(l) \
((l)->UnpVer >= 20 \
? ((l)->Flags&RHDF_DIRECTORY) \
: (IS_UNIX_MODE_(l) \
? (l)->FileAttr & S_IFDIR \
: (l)->FileAttr & 0x10))
#define GET_RAR_MODE(l) \
(IS_UNIX_MODE_(l) \
? (l)->FileAttr \
: IS_RAR_DIR(l) \
? (S_IFDIR|(0777&~umask_)) \
: (S_IFREG|(0666&~umask_)))
#define GET_RAR_SZ(l) \
(IS_RAR_DIR(l) ? 4096 : (((l)->UnpSizeHigh * 0x100000000ULL) | \
(l)->UnpSize))
#define GET_RAR_PACK_SZ(l) \
(IS_RAR_DIR(l) ? 4096 : (((l)->PackSizeHigh * 0x100000000ULL) | \
(l)->PackSize))
/*!
*****************************************************************************
*
****************************************************************************/
static int get_save_eof(char *rar)
{
if (rar) {
char *s = OPT_STR(OPT_KEY_SRC, 0);
int save_eof;
if (strstr(rar, s))
rar += strlen(s);
save_eof = rarconfig_getprop(int, rar, RAR_SAVE_EOF_PROP);
if (save_eof >= 0)
return save_eof;
save_eof = rarconfig_getprop(int, basename(rar),
RAR_SAVE_EOF_PROP);
if (save_eof >= 0)
return save_eof;
}
return OPT_SET(OPT_KEY_SAVE_EOF) ? 1 : 0;
}
/*!
*****************************************************************************
*
****************************************************************************/
static const char *get_alias(const char *rar, const char *file)
{
if (rar) {
char *file_abs;
char *rar_safe;
char *s = OPT_STR(OPT_KEY_SRC, 0);
const char *alias;
ABS_MP(file_abs, "/", file);
if (strstr(rar, s))
rar += strlen(s);
alias = rarconfig_getalias(rar, file_abs);
if (alias)
return alias + 1;
rar_safe = strdup(rar);
alias = rarconfig_getalias(basename(rar_safe), file_abs);
free(rar_safe);
if (alias)
return alias + 1;
}
return file;
}
/*!
*****************************************************************************
*
****************************************************************************/
static int get_seek_length(char *rar)
{
if (rar) {
char *s = OPT_STR(OPT_KEY_SRC, 0);
int seek_len;
if (strstr(rar, s))
rar += strlen(s);
seek_len = rarconfig_getprop(int, rar, RAR_SEEK_LENGTH_PROP);
if (seek_len >= 0)
return seek_len;
seek_len = rarconfig_getprop(int, basename(rar),
RAR_SEEK_LENGTH_PROP);
if (seek_len >= 0)
return seek_len;
}
return OPT_INT(OPT_KEY_SEEK_LENGTH, 0);
}
/*!
*****************************************************************************
*
****************************************************************************/
static void __dircache_invalidate_for_file(const char *path)
{
char *safe_path = strdup(path);
pthread_mutex_lock(&dir_access_mutex);
dircache_invalidate(dirname(safe_path));
pthread_mutex_unlock(&dir_access_mutex);
free(safe_path);
}
/*!
*****************************************************************************
*
****************************************************************************/
#ifdef HAVE_VISIBILITY_ATTRIB
__attribute__((visibility("hidden")))
#endif
void __handle_sigusr1()
{
printd(3, "Invalidating path cache\n");
pthread_mutex_lock(&file_access_mutex);
filecache_invalidate(NULL);
pthread_mutex_unlock(&file_access_mutex);
pthread_mutex_lock(&dir_access_mutex);
dircache_invalidate(NULL);
pthread_mutex_unlock(&dir_access_mutex);
}
/*!
*****************************************************************************
*
****************************************************************************/
#ifdef HAVE_VISIBILITY_ATTRIB
__attribute__((visibility("hidden")))
#endif
void __handle_sighup()
{
if (mount_type == MOUNT_FOLDER) {
rarconfig_destroy();
rarconfig_init(OPT_STR(OPT_KEY_SRC, 0),
OPT_STR(OPT_KEY_CONFIG, 0));
}
}
/*!
*****************************************************************************
*
****************************************************************************/
static int __wait_thread(struct io_context *op)
{
pthread_mutex_lock(&op->rd_req_mutex);
while (op->rd_req) /* sync */
pthread_cond_wait(&op->rd_req_cond, &op->rd_req_mutex);
pthread_mutex_unlock(&op->rd_req_mutex);
return 0;
}
/*!
*****************************************************************************
*
****************************************************************************/
static int __wake_thread(struct io_context *op, int req)
{
pthread_mutex_lock(&op->rd_req_mutex);
while (op->rd_req) /* sync */
pthread_cond_wait(&op->rd_req_cond, &op->rd_req_mutex);
op->rd_req = req;
pthread_cond_signal(&op->rd_req_cond);
pthread_mutex_unlock(&op->rd_req_mutex);
return 0;
}
/*!
*****************************************************************************
*
****************************************************************************/
static inline int is_rxx_vol(const char *name)
{
size_t len = strlen(name);
if (name[len - 4] == '.' &&
(name[len - 3] >= 'r' || name[len - 3] >= 'R') &&
isdigit(name[len - 2]) && isdigit(name[len - 1])) {
/* This seems to be a classic .rNN rar volume file.
* Let the rar header be the final judge. */
return 1;
}
return 0;
}
/*!
*****************************************************************************
*
****************************************************************************/
static inline int is_nnn_vol(const char *name)
{
size_t len = strlen(name);
if (name[len - 4] == '.' &&
isdigit(name[len - 3]) && isdigit(name[len - 2]) &&
isdigit(name[len - 1])) {
/* This seems to be a .NNN rar volume file.
* Let the rar header be the final judge. */
return 1;
}
return 0;
}
#define IS_ISO(s) (!strcasecmp((s)+(strlen(s)-4), ".iso"))
#define IS_AVI(s) (!strcasecmp((s)+(strlen(s)-4), ".avi"))
#define IS_MKV(s) (!strcasecmp((s)+(strlen(s)-4), ".mkv"))
#define IS_RAR(s) (!strcasecmp((s)+(strlen(s)-4), ".rar"))
#define IS_CBR(s) (!OPT_SET(OPT_KEY_NO_EXPAND_CBR) && \
!strcasecmp((s)+(strlen(s)-4), ".cbr"))
#define IS_RXX(s) (is_rxx_vol(s))
#define IS_NNN(s) (is_nnn_vol(s))
#define VTYPE(flags) \
((flags & ROADF_NEWNUMBERING) ? 1 : 0)
/*!
*****************************************************************************
*
****************************************************************************/
#if RARVER_MAJOR > 4 || ( RARVER_MAJOR == 4 && RARVER_MINOR >= 20 )
#define prop_type_ wchar
#define prop_alloc_type_ wchar_t
#define prop_memcpy_ wmemcpy
static wchar_t *get_password(const char *file, wchar_t *buf, size_t len)
#else
#define prop_type_ char
#define prop_alloc_type_ char
#define prop_memcpy_ memcpy
static char *get_password(const char *file, char *buf, size_t len)
#endif
{
char *f[2] = {NULL, NULL};
int l[2] = {0, 0};
int i;
int lx;
char *rar;
char *tmp;
char *s;
const prop_alloc_type_ *password;
if (!file)
return NULL;
rar = strdup(file);
tmp = rar;
s = OPT_STR(OPT_KEY_SRC, 0);
if (strstr(rar, s))
rar += strlen(s);
password = rarconfig_getprop(prop_type_, rar,
RAR_PASSWORD_PROP);
if (password) {
prop_memcpy_(buf, password, len);
free(tmp);
return buf;
}
password = rarconfig_getprop(prop_type_, basename(rar),
RAR_PASSWORD_PROP);
if (password) {
prop_memcpy_(buf, password, len);
free(tmp);
return buf;
}
free(tmp);
/* In case this is a new-style volume we must try to figure
* out the file format. */
(void)get_vformat(file, 1, NULL, &l[0]);
lx = l[0];
while (lx && file[lx] != '.') --lx;
if (lx) {
l[0] = lx;
f[0] = strdup(file);
}
/* In case this is an old-style volume, or even not a volume at
* all, simply placing the index behind .rar or .rNN should be
* enough to locate the password file. */
lx = strlen(file);
if (lx > 4) {
l[1] = lx - 4;
f[1] = strdup(file);
}
for (i = 0; i < 2; i++) {
if (f[i]) {
char *F = f[i];
strcpy(F + l[i], ".pwd");
FILE *fp = fopen(F, "r");
if (!fp) {
char *tmp1 = strdup(F);
char *tmp2 = strdup(F);
F = malloc(strlen(file) + 8);
sprintf(F, "%s%s%s", dirname(tmp1),
"/.", basename(tmp2));
free(tmp1);
free(tmp2);
fp = fopen(F, "r");
free(F);
}
if (fp) {
#if RARVER_MAJOR > 4 || ( RARVER_MAJOR == 4 && RARVER_MINOR >= 20 )
buf = fgetws(buf, len, fp);
if (buf) {
wchar_t *eol = wcspbrk(buf, L"\r\n");
if (eol != NULL)
*eol = 0;
}
#else
buf = fgets(buf, len, fp);
#endif
fclose(fp);
free(f[0]);
free(f[1]);
return buf;
}
}
}
free(f[0]);
free(f[1]);
return NULL;
}
#undef prop_type_
#undef prop_alloc_type_
#undef prop_memcpy_
/*!
*****************************************************************************
*
****************************************************************************/
size_t wide_to_utf8(const wchar_t *src, char *dst, size_t dst_size)
{
--dst_size;
size_t in_size = dst_size;
ssize_t out_size = dst_size;
while (*src !=0 && --out_size >= 0) {
unsigned int c = *(src++);
if (c < 0x80) {
*(dst++) = c;
continue;
}
if (c < 0x800 && --out_size >= 0) {
*(dst++) =(0xc0 | (c >> 6));
*(dst++) =(0x80 | (c & 0x3f));
continue;
}
/* Check for surrogate pair */
if (c >= 0xd800 && c <= 0xdbff &&
*src >= 0xdc00 && *src <= 0xdfff) {
c = ((c - 0xd800) << 10) + (*src - 0xdc00) + 0x10000;
src++;
}
if (c < 0x10000 && (out_size -= 2) >= 0) {
*(dst++) = (0xe0 | (c >> 12));
*(dst++) = (0x80 | ((c >> 6) & 0x3f));
*(dst++) = (0x80 | (c & 0x3f));
} else if (c < 0x200000 && (out_size -= 3) >= 0) {
*(dst++) = (0xf0 | (c >> 18));
*(dst++) = (0x80 | ((c >> 12) & 0x3f));
*(dst++) = (0x80 | ((c >> 6) & 0x3f));
*(dst++) = (0x80 | (c & 0x3f));
}
}
*dst = 0;
return in_size - out_size;
}
/*!
*****************************************************************************
*
****************************************************************************/
static inline size_t
wide_to_char(char *dst, const wchar_t *src, size_t size)
{
dst[0] = '\0';
#ifdef HAVE_ICONV
if (icd == (iconv_t)-1)
goto fallback;
size_t in_bytes = (wcslen(src) + 1) * sizeof(wchar_t);
size_t out_bytes = size;
char *in_buf = (char *)src;
char *out_buf = dst;
if (iconv(icd, (ICONV_CONST char **)&in_buf, &in_bytes,
&out_buf, &out_bytes) == (size_t)-1) {
if (errno == E2BIG) {
/* Make sure the buffer is terminated properly but
* otherwise keep the truncated result. */
dst[size] = '\0';
return size;
} else {
*out_buf = '\0';
perror("iconv");
}
} else {
return size - out_bytes;
}
return -1;
fallback:
#endif
if (*src) {
#ifdef HAVE_WCSTOMBS
#if 0
size_t n = wcstombs(NULL, src, 0);
if (n != (size_t)-1) {
if (size >= (n + 1))
return wcstombs(dst, src, size);
}
#endif
#endif
/* Translation failed! Use fallback to strict UTF-8. */
return wide_to_utf8(src, dst, size);
}
return -1;
}
/*!
*****************************************************************************
*
****************************************************************************/
static struct filecache_entry *path_lookup_miss(const char *path, struct stat *stbuf)
{
struct stat st;
char *root;
printd(3, "MISS %s\n", path);
if (fs_loop) {
if (!strcmp(path, fs_loop_mp_root)) {
memcpy(stbuf, &fs_loop_mp_stat, sizeof(struct stat));
return LOCAL_FS_ENTRY;
} else {
if (!strncmp(path, fs_loop_mp_base, fs_loop_mp_base_len))
return LOOP_FS_ENTRY;
}
}
ABS_ROOT(root, path);
/* Check if the missing file can be found on the local fs */
if (!lstat(root, stbuf ? stbuf : &st)) {
printd(3, "STAT retrieved for %s\n", root);
return LOCAL_FS_ENTRY;
}
/* Check if the missing file is a fake .iso */
if (OPT_SET(OPT_KEY_FAKE_ISO) && IS_ISO(root)) {
struct filecache_entry *e_p;
int i;
int obj = OPT_CNT(OPT_KEY_FAKE_ISO)
? OPT_KEY_FAKE_ISO
: OPT_KEY_IMG_TYPE;
/* Try the image file extensions one by one */
for (i = 0; i < OPT_CNT(obj); i++) {
char *tmp = (OPT_STR(obj, i));
int l = strlen(tmp ? tmp : "");
char *root1 = strdup(root);
if (l > 4)
root1 = realloc(root1, strlen(root1) + 1 + (l - 4));
strcpy(root1 + (strlen(root1) - 4), tmp ? tmp : "");
if (lstat(root1, &st)) {
free(root1);
continue;
}
e_p = filecache_alloc(path);
e_p->file_p = strdup(path);
e_p->flags.fake_iso = 1;
if (l > 4) {
e_p->file_p = realloc(
e_p->file_p,
strlen(path) + 1 + (l - 4));
}
/* back-patch *real* file name */
strncpy(e_p->file_p + (strlen(e_p->file_p) - 4),
tmp ? tmp : "", l);
*(e_p->file_p+(strlen(path)-4+l)) = 0;
memcpy(&e_p->stat, &st, sizeof(struct stat));
if (stbuf)
memcpy(stbuf, &st, sizeof(struct stat));
free(root1);
return e_p;
}
}
return NULL;
}
/*!
*****************************************************************************
*
****************************************************************************/
static struct filecache_entry *path_lookup(const char *path, struct stat *stbuf)
{
struct filecache_entry *e_p = filecache_get(path);
struct filecache_entry *e2_p = e_p;
if (e_p && !e_p->flags.fake_iso && !e_p->flags.unresolved) {
if (stbuf)
memcpy(stbuf, &e_p->stat, sizeof(struct stat));
return e_p;
}
if (!e_p && mount_type == MOUNT_ARCHIVE && strcmp(path, "/"))
return NULL;
/* Do not remember fake .ISO entries between eg. getattr() calls */
if (e_p && e_p->flags.fake_iso)
filecache_invalidate(path);
e_p = path_lookup_miss(path, stbuf);
if (!e_p) {
if (e2_p && e2_p->flags.unresolved) {
pthread_mutex_lock(&dir_access_mutex);
dircache_invalidate(path);
pthread_mutex_unlock(&dir_access_mutex);
e2_p->flags.unresolved = 0;
if (stbuf)
memcpy(stbuf, &e2_p->stat, sizeof(struct stat));
return e2_p;
}
}
return e_p;
}
/*!
*****************************************************************************
*
****************************************************************************/
static int __stop_child(pid_t pid)
{
pid_t wpid;
int status = 0;
killpg(pid, SIGKILL);
/* Sync */
do {
wpid = waitpid(pid, &status, WNOHANG | WUNTRACED);
if (wpid == -1) {
/*
* POSIX.1-2001 specifies that if the disposition of
* SIGCHLD is set to SIG_IGN or the SA_NOCLDWAIT flag
* is set for SIGCHLD (see sigaction(2)), then
* children that terminate do not become zombies and
* a call to wait() or waitpid() will block until all
* children have terminated, and then fail with errno
* set to ECHILD.
*/
if (errno != ECHILD)
perror("waitpid");
return 0;
}
} while (!wpid || (!WIFEXITED(status) && !WIFSIGNALED(status)));
if (WIFEXITED(status))
return WEXITSTATUS(status);
return 0;
}
/*!
*****************************************************************************
*
****************************************************************************/
static FILE *popen_(const struct filecache_entry *entry_p, pid_t *cpid)
{
int fd = -1;
int pfd[2] = {-1,};
pid_t pid;
if (pipe(pfd) == -1) {
perror("pipe");
goto error;
}
pid = fork();
if (pid == 0) {
int ret;
setpgid(getpid(), 0);
close(pfd[0]); /* Close unused read end */
ret = extract_rar(entry_p->rar_p,
entry_p->file_p,
(void *)(uintptr_t) pfd[1]);
close(pfd[1]);
_exit(ret);
} else if (pid < 0) {
/* The fork failed. */
goto error;
}
/* This is the parent process. */
close(pfd[1]); /* Close unused write end */
*cpid = pid;
return fdopen(pfd[0], "r");
error:
if (fd >= 0)
close(fd);
if (pfd[0] >= 0)
close(pfd[0]);
if (pfd[1] >= 0)
close(pfd[1]);
return NULL;
}
/*!
*****************************************************************************
*
****************************************************************************/
static int pclose_(FILE *fp, pid_t pid)
{
fclose(fp);
return __stop_child(pid);
}
/* Size of file in first volume number in which it exists */
#define VOL_FIRST_SZ (op->entry_p->vsize_first)
/*
* Size of file in the following volume numbers (if situated in more than one).
* Compared to VOL_FIRST_SZ this is a qualified guess value only and it is
* not uncommon that it actually becomes equal to VOL_FIRST_SZ.
* For reference VOL_NEXT_SZ is basically the end of file data offset in
* first volume file reduced by the size of applicable headers and meta
* data. For the last volume file this value is more than likely bogus.
* This does not matter since the total file size is still reported
* correctly and anything trying to read it should stop once reaching EOF.
* The read function will infact verify that this is always the case and
* throw an error if trying to read beyond EOF. The important thing here
* is that the volumes files other than the first and last match this value.
*/
#define VOL_NEXT_SZ (op->entry_p->vsize_next)
/* Size of file data (including headers) in first volume number */
#define VOL_REAL_SZ(x) \
((x)?op->entry_p->vsize_real_next:op->entry_p->vsize_real_first)
/*!
*****************************************************************************
*
****************************************************************************/
static char *get_vname(int t, const char *str, int vol, int len, int pos)
{
ENTER_("%s vol=%d, len=%d, pos=%d", str, vol, len, pos);
char *s = strdup(str);
if (t) {
char f[16];
char f1[16];
sprintf(f1, "%%0%dd", len);
sprintf(f, f1, vol);
strncpy(&s[pos], f, len);
} else {
char f[16];
int lower = s[pos - 1] >= 'r';
if (vol == 0) {
sprintf(f, "%s", (lower ? "ar" : "AR"));
} else if (vol <= 100) {
sprintf(f, "%02d", (vol - 1));
} else { /* Possible, but unlikely */
sprintf(f, "%c%02d", (lower ? 'r' : 'R') + (vol - 1) / 100,
(vol - 1) % 100);
--pos;
++len;
}
strncpy(&s[pos], f, len);
}
return s;
}
/*!
*****************************************************************************
*
****************************************************************************/
static int get_vformat(const char *s, int t, int *l, int *p)
{
int len = 0;
int pos = 0;
int vol = 0;
const size_t SLEN = strlen(s);
if (t) {
const char *c = s + SLEN - 1;
while (!isdigit(*c) && c > s)
c--;
const char *num = c;
while (isdigit(*num) && num > s)
num--;
while (num > s && *num != '.') {
if (isdigit(*num)) {
char *dot = strchr(s, '.');
if (dot != NULL && dot < num)
c = num;
break;
}
num--;
}
while (c != s) {
if (isdigit(*c)) {
--c;
++len;
} else {
break;
}
}
if (c != s)
vol = strtoul(c + 1, NULL, 10);
else
vol = 0;
pos = c - s + 1;
} else {
int dot = 0;
len = SLEN - 1;
while (dot < 1 && len >= 0) {
if (s[len--] == '.')
++dot;
}
if (len >= 0) {
pos = len + 1;
len = SLEN - pos;
if (len == 4) {
pos += 2;
len -= 2;
if ((s[pos - 1] == 'r' || s[pos - 1] == 'R') &&
(s[pos ] == 'a' || s[pos ] == 'A') &&
(s[pos + 1] == 'r' || s[pos + 1] == 'R')) {
vol = 0;
} else {
int lower = s[pos - 1] >= 'r';
errno = 0;
vol = strtoul(&s[pos], NULL, 10) + 1 +
/* Possible, but unlikely */
(100 * (s[pos - 1] - (lower ? 'r' : 'R')));
vol = errno ? 0 : vol;
}
}
}
}
if (l) *l = len;
if (p) *p = pos;
return vol;
}
/*!
*****************************************************************************
*
****************************************************************************/
static int __check_vol_header(const char *arch)
{
HANDLE h;
RAROpenArchiveDataEx d;
struct RARHeaderDataEx header;
memset(&d, 0, sizeof(RAROpenArchiveDataEx));
d.ArcName = (char *)arch; /* Horrible cast! But hey... it is the API! */
d.OpenMode = RAR_OM_LIST_INCSPLIT;
d.Callback = list_callback_noswitch;
d.UserData = (LPARAM)arch;
h = RAROpenArchiveEx(&d);
/* Check for fault */
if (d.OpenResult) {
if (h)
RARCloseArchive(h);
return -1;
}
if (d.Flags & ROADF_ENCHEADERS) {
RARCloseArchive(h);
d.Callback = list_callback;
h = RAROpenArchiveEx(&d);
}
if (d.Flags & ROADF_VOLUME) {
if (!(d.Flags & ROADF_FIRSTVOLUME)) {
RARCloseArchive(h);
return -1;
}
}
if (RARReadHeaderEx(h, &header)) {
RARCloseArchive(h);
return -1;
}
RARCloseArchive(h);
return 0;
}
/*!
*****************************************************************************
*
****************************************************************************/
static int __RARVolNameToFirstName(char *s, int vtype)
{
char *s_copy = strdup(s);
RARVolNameToFirstName(s, vtype);
if (!IS_RAR(s) && !IS_NNN(s)) {
free(s_copy);