diff options
Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_read_disk_windows.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_read_disk_windows.c | 2547 |
1 files changed, 2547 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_read_disk_windows.c b/src/libs/3rdparty/libarchive/archive_read_disk_windows.c new file mode 100644 index 000000000..f92a78a21 --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_read_disk_windows.c @@ -0,0 +1,2547 @@ +/*- + * Copyright (c) 2003-2009 Tim Kientzle + * Copyright (c) 2010-2012 Michihiro NAKAJIMA + * All rights reserved. + * + * 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 + * in this position and unchanged. + * 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 AUTHOR(S) ``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 AUTHOR(S) 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. + */ +#include "archive_platform.h" +__FBSDID("$FreeBSD$"); + +#if defined(_WIN32) && !defined(__CYGWIN__) + +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#include <winioctl.h> + +#include "archive.h" +#include "archive_string.h" +#include "archive_entry.h" +#include "archive_private.h" +#include "archive_read_disk_private.h" + +#ifndef O_BINARY +#define O_BINARY 0 +#endif +#ifndef IO_REPARSE_TAG_SYMLINK +/* Old SDKs do not provide IO_REPARSE_TAG_SYMLINK */ +#define IO_REPARSE_TAG_SYMLINK 0xA000000CL +#endif + +/*- + * This is a new directory-walking system that addresses a number + * of problems I've had with fts(3). In particular, it has no + * pathname-length limits (other than the size of 'int'), handles + * deep logical traversals, uses considerably less memory, and has + * an opaque interface (easier to modify in the future). + * + * Internally, it keeps a single list of "tree_entry" items that + * represent filesystem objects that require further attention. + * Non-directories are not kept in memory: they are pulled from + * readdir(), returned to the client, then freed as soon as possible. + * Any directory entry to be traversed gets pushed onto the stack. + * + * There is surprisingly little information that needs to be kept for + * each item on the stack. Just the name, depth (represented here as the + * string length of the parent directory's pathname), and some markers + * indicating how to get back to the parent (via chdir("..") for a + * regular dir or via fchdir(2) for a symlink). + */ + +struct restore_time { + const wchar_t *full_path; + FILETIME lastWriteTime; + FILETIME lastAccessTime; + mode_t filetype; +}; + +struct tree_entry { + int depth; + struct tree_entry *next; + struct tree_entry *parent; + size_t full_path_dir_length; + struct archive_wstring name; + struct archive_wstring full_path; + size_t dirname_length; + int64_t dev; + int64_t ino; + int flags; + int filesystem_id; + /* How to restore time of a directory. */ + struct restore_time restore_time; +}; + +struct filesystem { + int64_t dev; + int synthetic; + int remote; + DWORD bytesPerSector; +}; + +/* Definitions for tree_entry.flags bitmap. */ +#define isDir 1 /* This entry is a regular directory. */ +#define isDirLink 2 /* This entry is a symbolic link to a directory. */ +#define needsFirstVisit 4 /* This is an initial entry. */ +#define needsDescent 8 /* This entry needs to be previsited. */ +#define needsOpen 16 /* This is a directory that needs to be opened. */ +#define needsAscent 32 /* This entry needs to be postvisited. */ + +/* + * On Windows, "first visit" is handled as a pattern to be handed to + * _findfirst(). This is consistent with Windows conventions that + * file patterns are handled within the application. On Posix, + * "first visit" is just returned to the client. + */ + +#define MAX_OVERLAPPED 8 +#define READ_BUFFER_SIZE (1024 * 64) /* Default to 64KB per https://technet.microsoft.com/en-us/library/cc938632.aspx */ +#define DIRECT_IO 0/* Disabled */ +#define ASYNC_IO 1/* Enabled */ + +/* + * Local data for this package. + */ +struct tree { + struct tree_entry *stack; + struct tree_entry *current; + HANDLE d; + WIN32_FIND_DATAW _findData; + WIN32_FIND_DATAW *findData; + int flags; + int visit_type; + /* Error code from last failed operation. */ + int tree_errno; + + /* A full path with "\\?\" prefix. */ + struct archive_wstring full_path; + size_t full_path_dir_length; + /* Dynamically-sized buffer for holding path */ + struct archive_wstring path; + + /* Last path element */ + const wchar_t *basename; + /* Leading dir length */ + size_t dirname_length; + + int depth; + + BY_HANDLE_FILE_INFORMATION lst; + BY_HANDLE_FILE_INFORMATION st; + int descend; + /* How to restore time of a file. */ + struct restore_time restore_time; + + struct entry_sparse { + int64_t length; + int64_t offset; + } *sparse_list, *current_sparse; + int sparse_count; + int sparse_list_size; + + char initial_symlink_mode; + char symlink_mode; + struct filesystem *current_filesystem; + struct filesystem *filesystem_table; + int initial_filesystem_id; + int current_filesystem_id; + int max_filesystem_id; + int allocated_filesystem; + + HANDLE entry_fh; + int entry_eof; + int64_t entry_remaining_bytes; + int64_t entry_total; + + int ol_idx_doing; + int ol_idx_done; + int ol_num_doing; + int ol_num_done; + int64_t ol_remaining_bytes; + int64_t ol_total; + struct la_overlapped { + OVERLAPPED ol; + struct archive * _a; + unsigned char *buff; + size_t buff_size; + int64_t offset; + size_t bytes_expected; + size_t bytes_transferred; + } ol[MAX_OVERLAPPED]; + int direct_io; + int async_io; +}; + +#define bhfi_dev(bhfi) ((bhfi)->dwVolumeSerialNumber) +/* Treat FileIndex as i-node. We should remove a sequence number + * which is high-16-bits of nFileIndexHigh. */ +#define bhfi_ino(bhfi) \ + ((((int64_t)((bhfi)->nFileIndexHigh & 0x0000FFFFUL)) << 32) \ + + (bhfi)->nFileIndexLow) + +/* Definitions for tree.flags bitmap. */ +#define hasStat 16 /* The st entry is valid. */ +#define hasLstat 32 /* The lst entry is valid. */ +#define needsRestoreTimes 128 + +static int +tree_dir_next_windows(struct tree *t, const wchar_t *pattern); + +/* Initiate/terminate a tree traversal. */ +static struct tree *tree_open(const wchar_t *, int, int); +static struct tree *tree_reopen(struct tree *, const wchar_t *, int); +static void tree_close(struct tree *); +static void tree_free(struct tree *); +static void tree_push(struct tree *, const wchar_t *, const wchar_t *, + int, int64_t, int64_t, struct restore_time *); + +/* + * tree_next() returns Zero if there is no next entry, non-zero if + * there is. Note that directories are visited three times. + * Directories are always visited first as part of enumerating their + * parent; that is a "regular" visit. If tree_descend() is invoked at + * that time, the directory is added to a work list and will + * subsequently be visited two more times: once just after descending + * into the directory ("postdescent") and again just after ascending + * back to the parent ("postascent"). + * + * TREE_ERROR_DIR is returned if the descent failed (because the + * directory couldn't be opened, for instance). This is returned + * instead of TREE_POSTDESCENT/TREE_POSTASCENT. TREE_ERROR_DIR is not a + * fatal error, but it does imply that the relevant subtree won't be + * visited. TREE_ERROR_FATAL is returned for an error that left the + * traversal completely hosed. Right now, this is only returned for + * chdir() failures during ascent. + */ +#define TREE_REGULAR 1 +#define TREE_POSTDESCENT 2 +#define TREE_POSTASCENT 3 +#define TREE_ERROR_DIR -1 +#define TREE_ERROR_FATAL -2 + +static int tree_next(struct tree *); + +/* + * Return information about the current entry. + */ + +/* + * The current full pathname, length of the full pathname, and a name + * that can be used to access the file. Because tree does use chdir + * extensively, the access path is almost never the same as the full + * current path. + * + */ +static const wchar_t *tree_current_path(struct tree *); +static const wchar_t *tree_current_access_path(struct tree *); + +/* + * Request the lstat() or stat() data for the current path. Since the + * tree package needs to do some of this anyway, and caches the + * results, you should take advantage of it here if you need it rather + * than make a redundant stat() or lstat() call of your own. + */ +static const BY_HANDLE_FILE_INFORMATION *tree_current_stat(struct tree *); +static const BY_HANDLE_FILE_INFORMATION *tree_current_lstat(struct tree *); + +/* The following functions use tricks to avoid a certain number of + * stat()/lstat() calls. */ +/* "is_physical_dir" is equivalent to S_ISDIR(tree_current_lstat()->st_mode) */ +static int tree_current_is_physical_dir(struct tree *); +/* "is_physical_link" is equivalent to S_ISLNK(tree_current_lstat()->st_mode) */ +static int tree_current_is_physical_link(struct tree *); +/* Instead of archive_entry_copy_stat for BY_HANDLE_FILE_INFORMATION */ +static void tree_archive_entry_copy_bhfi(struct archive_entry *, + struct tree *, const BY_HANDLE_FILE_INFORMATION *); +/* "is_dir" is equivalent to S_ISDIR(tree_current_stat()->st_mode) */ +static int tree_current_is_dir(struct tree *); +static int update_current_filesystem(struct archive_read_disk *a, + int64_t dev); +static int setup_current_filesystem(struct archive_read_disk *); +static int tree_target_is_same_as_parent(struct tree *, + const BY_HANDLE_FILE_INFORMATION *); + +static int _archive_read_disk_open_w(struct archive *, const wchar_t *); +static int _archive_read_free(struct archive *); +static int _archive_read_close(struct archive *); +static int _archive_read_data_block(struct archive *, + const void **, size_t *, int64_t *); +static int _archive_read_next_header(struct archive *, + struct archive_entry **); +static int _archive_read_next_header2(struct archive *, + struct archive_entry *); +static const char *trivial_lookup_gname(void *, int64_t gid); +static const char *trivial_lookup_uname(void *, int64_t uid); +static int setup_sparse(struct archive_read_disk *, struct archive_entry *); +static int close_and_restore_time(HANDLE, struct tree *, + struct restore_time *); +static int setup_sparse_from_disk(struct archive_read_disk *, + struct archive_entry *, HANDLE); +static int la_linkname_from_handle(HANDLE, wchar_t **, int *); +static int la_linkname_from_pathw(const wchar_t *, wchar_t **, int *); +static void entry_symlink_from_pathw(struct archive_entry *, + const wchar_t *path); + +typedef struct _REPARSE_DATA_BUFFER { + ULONG ReparseTag; + USHORT ReparseDataLength; + USHORT Reserved; + union { + struct { + USHORT SubstituteNameOffset; + USHORT SubstituteNameLength; + USHORT PrintNameOffset; + USHORT PrintNameLength; + ULONG Flags; + WCHAR PathBuffer[1]; + } SymbolicLinkReparseBuffer; + struct { + USHORT SubstituteNameOffset; + USHORT SubstituteNameLength; + USHORT PrintNameOffset; + USHORT PrintNameLength; + WCHAR PathBuffer[1]; + } MountPointReparseBuffer; + struct { + UCHAR DataBuffer[1]; + } GenericReparseBuffer; + } DUMMYUNIONNAME; +} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER; + +/* + * Reads the target of a symbolic link + * + * Returns 0 on success and -1 on failure + * outbuf is allocated in the function + */ +static int +la_linkname_from_handle(HANDLE h, wchar_t **linkname, int *linktype) +{ + DWORD inbytes; + REPARSE_DATA_BUFFER *buf; + BY_HANDLE_FILE_INFORMATION st; + size_t len; + BOOL ret; + BYTE *indata; + wchar_t *tbuf; + + ret = GetFileInformationByHandle(h, &st); + if (ret == 0 || + (st.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) == 0) { + return (-1); + } + + indata = malloc(MAXIMUM_REPARSE_DATA_BUFFER_SIZE); + ret = DeviceIoControl(h, FSCTL_GET_REPARSE_POINT, NULL, 0, indata, + 1024, &inbytes, NULL); + if (ret == 0) { + la_dosmaperr(GetLastError()); + free(indata); + return (-1); + } + + buf = (REPARSE_DATA_BUFFER *) indata; + if (buf->ReparseTag != IO_REPARSE_TAG_SYMLINK) { + free(indata); + /* File is not a symbolic link */ + errno = EINVAL; + return (-1); + } + + len = buf->SymbolicLinkReparseBuffer.SubstituteNameLength; + if (len <= 0) { + free(indata); + return (-1); + } + + tbuf = malloc(len + 1 * sizeof(wchar_t)); + if (tbuf == NULL) { + free(indata); + return (-1); + } + + memcpy(tbuf, &((BYTE *)buf->SymbolicLinkReparseBuffer.PathBuffer) + [buf->SymbolicLinkReparseBuffer.SubstituteNameOffset], len); + free(indata); + + tbuf[len / sizeof(wchar_t)] = L'\0'; + + *linkname = tbuf; + + /* + * Translate backslashes to slashes for libarchive internal use + */ + while(*tbuf != L'\0') { + if (*tbuf == L'\\') + *tbuf = L'/'; + tbuf++; + } + + if ((st.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0) + *linktype = AE_SYMLINK_TYPE_FILE; + else + *linktype = AE_SYMLINK_TYPE_DIRECTORY; + + return (0); +} + +/* + * Returns AE_SYMLINK_TYPE_FILE, AE_SYMLINK_TYPE_DIRECTORY or -1 on error + */ +static int +la_linkname_from_pathw(const wchar_t *path, wchar_t **outbuf, int *linktype) +{ + HANDLE h; + const DWORD flag = FILE_FLAG_BACKUP_SEMANTICS | + FILE_FLAG_OPEN_REPARSE_POINT; + int ret; + +# if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + CREATEFILE2_EXTENDED_PARAMETERS createExParams; + ZeroMemory(&createExParams, sizeof(createExParams)); + createExParams.dwSize = sizeof(createExParams); + createExParams.dwFileFlags = flag; + h = CreateFile2(path, 0, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + OPEN_EXISTING, &createExParams); +#else + h = CreateFileW(path, 0, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, + OPEN_EXISTING, flag, NULL); +#endif + if (h == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + return (-1); + } + + ret = la_linkname_from_handle(h, outbuf, linktype); + CloseHandle(h); + + return (ret); +} + +static void +entry_symlink_from_pathw(struct archive_entry *entry, const wchar_t *path) +{ + wchar_t *linkname = NULL; + int ret, linktype; + + ret = la_linkname_from_pathw(path, &linkname, &linktype); + if (ret != 0) + return; + if (linktype >= 0) { + archive_entry_copy_symlink_w(entry, linkname); + archive_entry_set_symlink_type(entry, linktype); + } + free(linkname); + + return; +} + +static const struct archive_vtable +archive_read_disk_vtable = { + .archive_free = _archive_read_free, + .archive_close = _archive_read_close, + .archive_read_data_block = _archive_read_data_block, + .archive_read_next_header = _archive_read_next_header, + .archive_read_next_header2 = _archive_read_next_header2, +}; + +const char * +archive_read_disk_gname(struct archive *_a, la_int64_t gid) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + if (ARCHIVE_OK != __archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_gname")) + return (NULL); + if (a->lookup_gname == NULL) + return (NULL); + return ((*a->lookup_gname)(a->lookup_gname_data, gid)); +} + +const char * +archive_read_disk_uname(struct archive *_a, la_int64_t uid) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + if (ARCHIVE_OK != __archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_uname")) + return (NULL); + if (a->lookup_uname == NULL) + return (NULL); + return ((*a->lookup_uname)(a->lookup_uname_data, uid)); +} + +int +archive_read_disk_set_gname_lookup(struct archive *_a, + void *private_data, + const char * (*lookup_gname)(void *private, la_int64_t gid), + void (*cleanup_gname)(void *private)) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + archive_check_magic(&a->archive, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_set_gname_lookup"); + + if (a->cleanup_gname != NULL && a->lookup_gname_data != NULL) + (a->cleanup_gname)(a->lookup_gname_data); + + a->lookup_gname = lookup_gname; + a->cleanup_gname = cleanup_gname; + a->lookup_gname_data = private_data; + return (ARCHIVE_OK); +} + +int +archive_read_disk_set_uname_lookup(struct archive *_a, + void *private_data, + const char * (*lookup_uname)(void *private, int64_t uid), + void (*cleanup_uname)(void *private)) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + archive_check_magic(&a->archive, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_set_uname_lookup"); + + if (a->cleanup_uname != NULL && a->lookup_uname_data != NULL) + (a->cleanup_uname)(a->lookup_uname_data); + + a->lookup_uname = lookup_uname; + a->cleanup_uname = cleanup_uname; + a->lookup_uname_data = private_data; + return (ARCHIVE_OK); +} + +/* + * Create a new archive_read_disk object and initialize it with global state. + */ +struct archive * +archive_read_disk_new(void) +{ + struct archive_read_disk *a; + + a = (struct archive_read_disk *)calloc(1, sizeof(*a)); + if (a == NULL) + return (NULL); + a->archive.magic = ARCHIVE_READ_DISK_MAGIC; + a->archive.state = ARCHIVE_STATE_NEW; + a->archive.vtable = &archive_read_disk_vtable; + a->entry = archive_entry_new2(&a->archive); + a->lookup_uname = trivial_lookup_uname; + a->lookup_gname = trivial_lookup_gname; + a->flags = ARCHIVE_READDISK_MAC_COPYFILE; + return (&a->archive); +} + +static int +_archive_read_free(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + int r; + + if (_a == NULL) + return (ARCHIVE_OK); + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_read_free"); + + if (a->archive.state != ARCHIVE_STATE_CLOSED) + r = _archive_read_close(&a->archive); + else + r = ARCHIVE_OK; + + tree_free(a->tree); + if (a->cleanup_gname != NULL && a->lookup_gname_data != NULL) + (a->cleanup_gname)(a->lookup_gname_data); + if (a->cleanup_uname != NULL && a->lookup_uname_data != NULL) + (a->cleanup_uname)(a->lookup_uname_data); + archive_string_free(&a->archive.error_string); + archive_entry_free(a->entry); + a->archive.magic = 0; + free(a); + return (r); +} + +static int +_archive_read_close(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_read_close"); + + if (a->archive.state != ARCHIVE_STATE_FATAL) + a->archive.state = ARCHIVE_STATE_CLOSED; + + tree_close(a->tree); + + return (ARCHIVE_OK); +} + +static void +setup_symlink_mode(struct archive_read_disk *a, char symlink_mode, + int follow_symlinks) +{ + a->symlink_mode = symlink_mode; + a->follow_symlinks = follow_symlinks; + if (a->tree != NULL) { + a->tree->initial_symlink_mode = a->symlink_mode; + a->tree->symlink_mode = a->symlink_mode; + } +} + +int +archive_read_disk_set_symlink_logical(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_set_symlink_logical"); + setup_symlink_mode(a, 'L', 1); + return (ARCHIVE_OK); +} + +int +archive_read_disk_set_symlink_physical(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_set_symlink_physical"); + setup_symlink_mode(a, 'P', 0); + return (ARCHIVE_OK); +} + +int +archive_read_disk_set_symlink_hybrid(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_set_symlink_hybrid"); + setup_symlink_mode(a, 'H', 1);/* Follow symlinks initially. */ + return (ARCHIVE_OK); +} + +int +archive_read_disk_set_atime_restored(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_restore_atime"); + a->flags |= ARCHIVE_READDISK_RESTORE_ATIME; + if (a->tree != NULL) + a->tree->flags |= needsRestoreTimes; + return (ARCHIVE_OK); +} + +int +archive_read_disk_set_behavior(struct archive *_a, int flags) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + int r = ARCHIVE_OK; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_honor_nodump"); + + a->flags = flags; + + if (flags & ARCHIVE_READDISK_RESTORE_ATIME) + r = archive_read_disk_set_atime_restored(_a); + else { + if (a->tree != NULL) + a->tree->flags &= ~needsRestoreTimes; + } + return (r); +} + +/* + * Trivial implementations of gname/uname lookup functions. + * These are normally overridden by the client, but these stub + * versions ensure that we always have something that works. + */ +static const char * +trivial_lookup_gname(void *private_data, int64_t gid) +{ + (void)private_data; /* UNUSED */ + (void)gid; /* UNUSED */ + return (NULL); +} + +static const char * +trivial_lookup_uname(void *private_data, int64_t uid) +{ + (void)private_data; /* UNUSED */ + (void)uid; /* UNUSED */ + return (NULL); +} + +static int64_t +align_num_per_sector(struct tree *t, int64_t size) +{ + int64_t surplus; + + size += t->current_filesystem->bytesPerSector -1; + surplus = size % t->current_filesystem->bytesPerSector; + size -= surplus; + return (size); +} + +static int +start_next_async_read(struct archive_read_disk *a, struct tree *t) +{ + struct la_overlapped *olp; + DWORD buffbytes, rbytes; + + if (t->ol_remaining_bytes == 0) + return (ARCHIVE_EOF); + + olp = &(t->ol[t->ol_idx_doing]); + t->ol_idx_doing = (t->ol_idx_doing + 1) % MAX_OVERLAPPED; + + /* Allocate read buffer. */ + if (olp->buff == NULL) { + void *p; + size_t s = (size_t)align_num_per_sector(t, READ_BUFFER_SIZE); + p = VirtualAlloc(NULL, s, MEM_COMMIT, PAGE_READWRITE); + if (p == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Couldn't allocate memory"); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + olp->buff = p; + olp->buff_size = s; + olp->_a = &a->archive; + olp->ol.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL); + if (olp->ol.hEvent == NULL) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "CreateEvent failed"); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + } else + ResetEvent(olp->ol.hEvent); + + buffbytes = (DWORD)olp->buff_size; + if (buffbytes > t->current_sparse->length) + buffbytes = (DWORD)t->current_sparse->length; + + /* Skip hole. */ + if (t->current_sparse->offset > t->ol_total) { + t->ol_remaining_bytes -= + t->current_sparse->offset - t->ol_total; + } + + olp->offset = t->current_sparse->offset; + olp->ol.Offset = (DWORD)(olp->offset & 0xffffffff); + olp->ol.OffsetHigh = (DWORD)(olp->offset >> 32); + + if (t->ol_remaining_bytes > buffbytes) { + olp->bytes_expected = buffbytes; + t->ol_remaining_bytes -= buffbytes; + } else { + olp->bytes_expected = (size_t)t->ol_remaining_bytes; + t->ol_remaining_bytes = 0; + } + olp->bytes_transferred = 0; + t->current_sparse->offset += buffbytes; + t->current_sparse->length -= buffbytes; + t->ol_total = t->current_sparse->offset; + if (t->current_sparse->length == 0 && t->ol_remaining_bytes > 0) + t->current_sparse++; + + if (!ReadFile(t->entry_fh, olp->buff, buffbytes, &rbytes, &(olp->ol))) { + DWORD lasterr; + + lasterr = GetLastError(); + if (lasterr == ERROR_HANDLE_EOF) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Reading file truncated"); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } else if (lasterr != ERROR_IO_PENDING) { + if (lasterr == ERROR_NO_DATA) + errno = EAGAIN; + else if (lasterr == ERROR_ACCESS_DENIED) + errno = EBADF; + else + la_dosmaperr(lasterr); + archive_set_error(&a->archive, errno, "Read error"); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + } else + olp->bytes_transferred = rbytes; + t->ol_num_doing++; + + return (t->ol_remaining_bytes == 0)? ARCHIVE_EOF: ARCHIVE_OK; +} + +static void +cancel_async(struct tree *t) +{ + if (t->ol_num_doing != t->ol_num_done) { + CancelIo(t->entry_fh); + t->ol_num_doing = t->ol_num_done = 0; + } +} + +static int +_archive_read_data_block(struct archive *_a, const void **buff, + size_t *size, int64_t *offset) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + struct tree *t = a->tree; + struct la_overlapped *olp; + DWORD bytes_transferred; + int r = ARCHIVE_FATAL; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA, + "archive_read_data_block"); + + if (t->entry_eof || t->entry_remaining_bytes <= 0) { + r = ARCHIVE_EOF; + goto abort_read_data; + } + + /* + * Make a request to read the file in asynchronous. + */ + if (t->ol_num_doing == 0) { + do { + r = start_next_async_read(a, t); + if (r == ARCHIVE_FATAL) + goto abort_read_data; + if (!t->async_io) + break; + } while (r == ARCHIVE_OK && t->ol_num_doing < MAX_OVERLAPPED); + } else { + if ((r = start_next_async_read(a, t)) == ARCHIVE_FATAL) + goto abort_read_data; + } + + olp = &(t->ol[t->ol_idx_done]); + t->ol_idx_done = (t->ol_idx_done + 1) % MAX_OVERLAPPED; + if (olp->bytes_transferred) + bytes_transferred = (DWORD)olp->bytes_transferred; + else if (!GetOverlappedResult(t->entry_fh, &(olp->ol), + &bytes_transferred, TRUE)) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "GetOverlappedResult failed"); + a->archive.state = ARCHIVE_STATE_FATAL; + r = ARCHIVE_FATAL; + goto abort_read_data; + } + t->ol_num_done++; + + if (bytes_transferred == 0 || + olp->bytes_expected != bytes_transferred) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Reading file truncated"); + a->archive.state = ARCHIVE_STATE_FATAL; + r = ARCHIVE_FATAL; + goto abort_read_data; + } + + *buff = olp->buff; + *size = bytes_transferred; + *offset = olp->offset; + if (olp->offset > t->entry_total) + t->entry_remaining_bytes -= olp->offset - t->entry_total; + t->entry_total = olp->offset + *size; + t->entry_remaining_bytes -= *size; + if (t->entry_remaining_bytes == 0) { + /* Close the current file descriptor */ + close_and_restore_time(t->entry_fh, t, &t->restore_time); + t->entry_fh = INVALID_HANDLE_VALUE; + t->entry_eof = 1; + } + return (ARCHIVE_OK); + +abort_read_data: + *buff = NULL; + *size = 0; + *offset = t->entry_total; + if (t->entry_fh != INVALID_HANDLE_VALUE) { + cancel_async(t); + /* Close the current file descriptor */ + close_and_restore_time(t->entry_fh, t, &t->restore_time); + t->entry_fh = INVALID_HANDLE_VALUE; + } + return (r); +} + +static int +next_entry(struct archive_read_disk *a, struct tree *t, + struct archive_entry *entry) +{ + const BY_HANDLE_FILE_INFORMATION *st; + const BY_HANDLE_FILE_INFORMATION *lst; + const char*name; + int descend, r; + + st = NULL; + lst = NULL; + t->descend = 0; + do { + switch (tree_next(t)) { + case TREE_ERROR_FATAL: + archive_set_error(&a->archive, t->tree_errno, + "%ls: Unable to continue traversing directory tree", + tree_current_path(t)); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + case TREE_ERROR_DIR: + archive_set_error(&a->archive, t->tree_errno, + "%ls: Couldn't visit directory", + tree_current_path(t)); + return (ARCHIVE_FAILED); + case 0: + return (ARCHIVE_EOF); + case TREE_POSTDESCENT: + case TREE_POSTASCENT: + break; + case TREE_REGULAR: + lst = tree_current_lstat(t); + if (lst == NULL) { + archive_set_error(&a->archive, t->tree_errno, + "%ls: Cannot stat", + tree_current_path(t)); + return (ARCHIVE_FAILED); + } + break; + } + } while (lst == NULL); + + archive_entry_copy_pathname_w(entry, tree_current_path(t)); + + /* + * Perform path matching. + */ + if (a->matching) { + r = archive_match_path_excluded(a->matching, entry); + if (r < 0) { + archive_set_error(&(a->archive), errno, + "Failed : %s", archive_error_string(a->matching)); + return (r); + } + if (r) { + if (a->excluded_cb_func) + a->excluded_cb_func(&(a->archive), + a->excluded_cb_data, entry); + return (ARCHIVE_RETRY); + } + } + + /* + * Distinguish 'L'/'P'/'H' symlink following. + */ + switch(t->symlink_mode) { + case 'H': + /* 'H': After the first item, rest like 'P'. */ + t->symlink_mode = 'P'; + /* 'H': First item (from command line) like 'L'. */ + /* FALLTHROUGH */ + case 'L': + /* 'L': Do descend through a symlink to dir. */ + descend = tree_current_is_dir(t); + /* 'L': Follow symlinks to files. */ + a->symlink_mode = 'L'; + a->follow_symlinks = 1; + /* 'L': Archive symlinks as targets, if we can. */ + st = tree_current_stat(t); + if (st != NULL && !tree_target_is_same_as_parent(t, st)) + break; + /* If stat fails, we have a broken symlink; + * in that case, don't follow the link. */ + /* FALLTHROUGH */ + default: + /* 'P': Don't descend through a symlink to dir. */ + descend = tree_current_is_physical_dir(t); + /* 'P': Don't follow symlinks to files. */ + a->symlink_mode = 'P'; + a->follow_symlinks = 0; + /* 'P': Archive symlinks as symlinks. */ + st = lst; + break; + } + + if (update_current_filesystem(a, bhfi_dev(st)) != ARCHIVE_OK) { + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + if (t->initial_filesystem_id == -1) + t->initial_filesystem_id = t->current_filesystem_id; + if (a->flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) { + if (t->initial_filesystem_id != t->current_filesystem_id) + return (ARCHIVE_RETRY); + } + t->descend = descend; + + tree_archive_entry_copy_bhfi(entry, t, st); + + /* Save the times to be restored. This must be in before + * calling archive_read_disk_descend() or any chance of it, + * especially, invoking a callback. */ + t->restore_time.lastWriteTime = st->ftLastWriteTime; + t->restore_time.lastAccessTime = st->ftLastAccessTime; + t->restore_time.filetype = archive_entry_filetype(entry); + + /* + * Perform time matching. + */ + if (a->matching) { + r = archive_match_time_excluded(a->matching, entry); + if (r < 0) { + archive_set_error(&(a->archive), errno, + "Failed : %s", archive_error_string(a->matching)); + return (r); + } + if (r) { + if (a->excluded_cb_func) + a->excluded_cb_func(&(a->archive), + a->excluded_cb_data, entry); + return (ARCHIVE_RETRY); + } + } + + /* Lookup uname/gname */ + name = archive_read_disk_uname(&(a->archive), archive_entry_uid(entry)); + if (name != NULL) + archive_entry_copy_uname(entry, name); + name = archive_read_disk_gname(&(a->archive), archive_entry_gid(entry)); + if (name != NULL) + archive_entry_copy_gname(entry, name); + + /* + * Perform owner matching. + */ + if (a->matching) { + r = archive_match_owner_excluded(a->matching, entry); + if (r < 0) { + archive_set_error(&(a->archive), errno, + "Failed : %s", archive_error_string(a->matching)); + return (r); + } + if (r) { + if (a->excluded_cb_func) + a->excluded_cb_func(&(a->archive), + a->excluded_cb_data, entry); + return (ARCHIVE_RETRY); + } + } + + /* + * File attributes + */ + if ((a->flags & ARCHIVE_READDISK_NO_FFLAGS) == 0) { + const int supported_attrs = + FILE_ATTRIBUTE_READONLY | + FILE_ATTRIBUTE_HIDDEN | + FILE_ATTRIBUTE_SYSTEM; + DWORD file_attrs = st->dwFileAttributes & supported_attrs; + if (file_attrs != 0) + archive_entry_set_fflags(entry, file_attrs, 0); + } + + /* + * Invoke a meta data filter callback. + */ + if (a->metadata_filter_func) { + if (!a->metadata_filter_func(&(a->archive), + a->metadata_filter_data, entry)) + return (ARCHIVE_RETRY); + } + + archive_entry_copy_sourcepath_w(entry, tree_current_access_path(t)); + + r = ARCHIVE_OK; + if (archive_entry_filetype(entry) == AE_IFREG && + archive_entry_size(entry) > 0) { + DWORD flags = FILE_FLAG_BACKUP_SEMANTICS; +#if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + CREATEFILE2_EXTENDED_PARAMETERS createExParams; +#endif + if (t->async_io) + flags |= FILE_FLAG_OVERLAPPED; + if (t->direct_io) + flags |= FILE_FLAG_NO_BUFFERING; + else + flags |= FILE_FLAG_SEQUENTIAL_SCAN; +#if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + ZeroMemory(&createExParams, sizeof(createExParams)); + createExParams.dwSize = sizeof(createExParams); + createExParams.dwFileFlags = flags; + t->entry_fh = CreateFile2(tree_current_access_path(t), + GENERIC_READ, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + OPEN_EXISTING, &createExParams); +#else + t->entry_fh = CreateFileW(tree_current_access_path(t), + GENERIC_READ, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + NULL, OPEN_EXISTING, flags, NULL); +#endif + if (t->entry_fh == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "Couldn't open %ls", tree_current_path(a->tree)); + return (ARCHIVE_FAILED); + } + + /* Find sparse data from the disk. */ + if ((a->flags & ARCHIVE_READDISK_NO_SPARSE) == 0) { + if (archive_entry_hardlink(entry) == NULL && + (st->dwFileAttributes & FILE_ATTRIBUTE_SPARSE_FILE) != 0) + r = setup_sparse_from_disk(a, entry, t->entry_fh); + } + } + return (r); +} + +static int +_archive_read_next_header(struct archive *_a, struct archive_entry **entryp) +{ + int ret; + struct archive_read_disk *a = (struct archive_read_disk *)_a; + *entryp = NULL; + ret = _archive_read_next_header2(_a, a->entry); + *entryp = a->entry; + return ret; +} + +static int +_archive_read_next_header2(struct archive *_a, struct archive_entry *entry) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + struct tree *t; + int r; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, + "archive_read_next_header2"); + + t = a->tree; + if (t->entry_fh != INVALID_HANDLE_VALUE) { + cancel_async(t); + close_and_restore_time(t->entry_fh, t, &t->restore_time); + t->entry_fh = INVALID_HANDLE_VALUE; + } + + archive_entry_clear(entry); + + while ((r = next_entry(a, t, entry)) == ARCHIVE_RETRY) + archive_entry_clear(entry); + + /* + * EOF and FATAL are persistent at this layer. By + * modifying the state, we guarantee that future calls to + * read a header or read data will fail. + */ + switch (r) { + case ARCHIVE_EOF: + a->archive.state = ARCHIVE_STATE_EOF; + break; + case ARCHIVE_OK: + case ARCHIVE_WARN: + t->entry_total = 0; + if (archive_entry_filetype(entry) == AE_IFREG) { + t->entry_remaining_bytes = archive_entry_size(entry); + t->entry_eof = (t->entry_remaining_bytes == 0)? 1: 0; + if (!t->entry_eof && + setup_sparse(a, entry) != ARCHIVE_OK) + return (ARCHIVE_FATAL); + } else { + t->entry_remaining_bytes = 0; + t->entry_eof = 1; + } + t->ol_idx_doing = t->ol_idx_done = 0; + t->ol_num_doing = t->ol_num_done = 0; + t->ol_remaining_bytes = t->entry_remaining_bytes; + t->ol_total = 0; + a->archive.state = ARCHIVE_STATE_DATA; + break; + case ARCHIVE_RETRY: + break; + case ARCHIVE_FATAL: + a->archive.state = ARCHIVE_STATE_FATAL; + break; + } + + __archive_reset_read_data(&a->archive); + return (r); +} + +static int +setup_sparse(struct archive_read_disk *a, struct archive_entry *entry) +{ + struct tree *t = a->tree; + int64_t aligned, length, offset; + int i; + + t->sparse_count = archive_entry_sparse_reset(entry); + if (t->sparse_count+1 > t->sparse_list_size) { + free(t->sparse_list); + t->sparse_list_size = t->sparse_count + 1; + t->sparse_list = malloc(sizeof(t->sparse_list[0]) * + t->sparse_list_size); + if (t->sparse_list == NULL) { + t->sparse_list_size = 0; + archive_set_error(&a->archive, ENOMEM, + "Can't allocate data"); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + } + /* + * Get sparse list and make sure those offsets and lengths are + * aligned by a sector size. + */ + for (i = 0; i < t->sparse_count; i++) { + archive_entry_sparse_next(entry, &offset, &length); + aligned = align_num_per_sector(t, offset); + if (aligned != offset) { + aligned -= t->current_filesystem->bytesPerSector; + length += offset - aligned; + } + t->sparse_list[i].offset = aligned; + aligned = align_num_per_sector(t, length); + t->sparse_list[i].length = aligned; + } + + aligned = align_num_per_sector(t, archive_entry_size(entry)); + if (i == 0) { + t->sparse_list[i].offset = 0; + t->sparse_list[i].length = aligned; + } else { + int j, last = i; + + t->sparse_list[i].offset = aligned; + t->sparse_list[i].length = 0; + for (i = 0; i < last; i++) { + if ((t->sparse_list[i].offset + + t->sparse_list[i].length) <= + t->sparse_list[i+1].offset) + continue; + /* + * Now sparse_list[i+1] is overlapped by sparse_list[i]. + * Merge those two. + */ + length = t->sparse_list[i+1].offset - + t->sparse_list[i].offset; + t->sparse_list[i+1].offset = t->sparse_list[i].offset; + t->sparse_list[i+1].length += length; + /* Remove sparse_list[i]. */ + for (j = i; j < last; j++) { + t->sparse_list[j].offset = + t->sparse_list[j+1].offset; + t->sparse_list[j].length = + t->sparse_list[j+1].length; + } + last--; + } + } + t->current_sparse = t->sparse_list; + + return (ARCHIVE_OK); +} + +int +archive_read_disk_set_matching(struct archive *_a, struct archive *_ma, + void (*_excluded_func)(struct archive *, void *, struct archive_entry *), + void *_client_data) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_ANY, "archive_read_disk_set_matching"); + a->matching = _ma; + a->excluded_cb_func = _excluded_func; + a->excluded_cb_data = _client_data; + return (ARCHIVE_OK); +} + +int +archive_read_disk_set_metadata_filter_callback(struct archive *_a, + int (*_metadata_filter_func)(struct archive *, void *, + struct archive_entry *), void *_client_data) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_ANY, + "archive_read_disk_set_metadata_filter_callback"); + + a->metadata_filter_func = _metadata_filter_func; + a->metadata_filter_data = _client_data; + return (ARCHIVE_OK); +} + +int +archive_read_disk_can_descend(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + struct tree *t = a->tree; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, + "archive_read_disk_can_descend"); + + return (t->visit_type == TREE_REGULAR && t->descend); +} + +/* + * Called by the client to mark the directory just returned from + * tree_next() as needing to be visited. + */ +int +archive_read_disk_descend(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + struct tree *t = a->tree; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, + "archive_read_disk_descend"); + + if (!archive_read_disk_can_descend(_a)) + return (ARCHIVE_OK); + + if (tree_current_is_physical_dir(t)) { + tree_push(t, t->basename, t->full_path.s, + t->current_filesystem_id, + bhfi_dev(&(t->lst)), bhfi_ino(&(t->lst)), + &t->restore_time); + t->stack->flags |= isDir; + } else if (tree_current_is_dir(t)) { + tree_push(t, t->basename, t->full_path.s, + t->current_filesystem_id, + bhfi_dev(&(t->st)), bhfi_ino(&(t->st)), + &t->restore_time); + t->stack->flags |= isDirLink; + } + t->descend = 0; + return (ARCHIVE_OK); +} + +int +archive_read_disk_open(struct archive *_a, const char *pathname) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + struct archive_wstring wpath; + int ret; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_NEW | ARCHIVE_STATE_CLOSED, + "archive_read_disk_open"); + archive_clear_error(&a->archive); + + /* Make a wchar_t string from a char string. */ + archive_string_init(&wpath); + if (archive_wstring_append_from_mbs(&wpath, pathname, + strlen(pathname)) != 0) { + if (errno == ENOMEM) + archive_set_error(&a->archive, ENOMEM, + "Can't allocate memory"); + else + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Can't convert a path to a wchar_t string"); + a->archive.state = ARCHIVE_STATE_FATAL; + ret = ARCHIVE_FATAL; + } else + ret = _archive_read_disk_open_w(_a, wpath.s); + + archive_wstring_free(&wpath); + return (ret); +} + +int +archive_read_disk_open_w(struct archive *_a, const wchar_t *pathname) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, + ARCHIVE_STATE_NEW | ARCHIVE_STATE_CLOSED, + "archive_read_disk_open_w"); + archive_clear_error(&a->archive); + + return (_archive_read_disk_open_w(_a, pathname)); +} + +static int +_archive_read_disk_open_w(struct archive *_a, const wchar_t *pathname) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + + if (a->tree != NULL) + a->tree = tree_reopen(a->tree, pathname, + a->flags & ARCHIVE_READDISK_RESTORE_ATIME); + else + a->tree = tree_open(pathname, a->symlink_mode, + a->flags & ARCHIVE_READDISK_RESTORE_ATIME); + if (a->tree == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate directory traversal data"); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + a->archive.state = ARCHIVE_STATE_HEADER; + + return (ARCHIVE_OK); +} + +/* + * Return a current filesystem ID which is index of the filesystem entry + * you've visited through archive_read_disk. + */ +int +archive_read_disk_current_filesystem(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA, + "archive_read_disk_current_filesystem"); + + return (a->tree->current_filesystem_id); +} + +static int +update_current_filesystem(struct archive_read_disk *a, int64_t dev) +{ + struct tree *t = a->tree; + int i, fid; + + if (t->current_filesystem != NULL && + t->current_filesystem->dev == dev) + return (ARCHIVE_OK); + + for (i = 0; i < t->max_filesystem_id; i++) { + if (t->filesystem_table[i].dev == dev) { + /* There is the filesystem ID we've already generated. */ + t->current_filesystem_id = i; + t->current_filesystem = &(t->filesystem_table[i]); + return (ARCHIVE_OK); + } + } + + /* + * There is a new filesystem, we generate a new ID for. + */ + fid = t->max_filesystem_id++; + if (t->max_filesystem_id > t->allocated_filesystem) { + size_t s; + void *p; + + s = t->max_filesystem_id * 2; + p = realloc(t->filesystem_table, + s * sizeof(*t->filesystem_table)); + if (p == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Can't allocate tar data"); + return (ARCHIVE_FATAL); + } + t->filesystem_table = (struct filesystem *)p; + t->allocated_filesystem = (int)s; + } + t->current_filesystem_id = fid; + t->current_filesystem = &(t->filesystem_table[fid]); + t->current_filesystem->dev = dev; + + return (setup_current_filesystem(a)); +} + +/* + * Returns 1 if current filesystem is generated filesystem, 0 if it is not + * or -1 if it is unknown. + */ +int +archive_read_disk_current_filesystem_is_synthetic(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA, + "archive_read_disk_current_filesystem"); + + return (a->tree->current_filesystem->synthetic); +} + +/* + * Returns 1 if current filesystem is remote filesystem, 0 if it is not + * or -1 if it is unknown. + */ +int +archive_read_disk_current_filesystem_is_remote(struct archive *_a) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + + archive_check_magic(_a, ARCHIVE_READ_DISK_MAGIC, ARCHIVE_STATE_DATA, + "archive_read_disk_current_filesystem"); + + return (a->tree->current_filesystem->remote); +} + +/* + * If symlink is broken, statfs or statvfs will fail. + * Use its directory path instead. + */ +static wchar_t * +safe_path_for_statfs(struct tree *t) +{ + const wchar_t *path; + wchar_t *cp, *p = NULL; + + path = tree_current_access_path(t); + if (tree_current_stat(t) == NULL) { + p = _wcsdup(path); + cp = wcsrchr(p, '/'); + if (cp != NULL && wcslen(cp) >= 2) { + cp[1] = '.'; + cp[2] = '\0'; + path = p; + } + } else + p = _wcsdup(path); + return (p); +} + +/* + * Get conditions of synthetic and remote on Windows + */ +static int +setup_current_filesystem(struct archive_read_disk *a) +{ + struct tree *t = a->tree; + wchar_t vol[256]; + wchar_t *path; + + t->current_filesystem->synthetic = -1;/* Not supported */ + path = safe_path_for_statfs(t); + if (!GetVolumePathNameW(path, vol, sizeof(vol)/sizeof(vol[0]))) { + free(path); + t->current_filesystem->remote = -1; + t->current_filesystem->bytesPerSector = 0; + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "GetVolumePathName failed: %d", (int)GetLastError()); + return (ARCHIVE_FAILED); + } + free(path); + switch (GetDriveTypeW(vol)) { + case DRIVE_UNKNOWN: + case DRIVE_NO_ROOT_DIR: + t->current_filesystem->remote = -1; + break; + case DRIVE_REMOTE: + t->current_filesystem->remote = 1; + break; + default: + t->current_filesystem->remote = 0; + break; + } + + if (!GetDiskFreeSpaceW(vol, NULL, + &(t->current_filesystem->bytesPerSector), NULL, NULL)) { + t->current_filesystem->bytesPerSector = 0; + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "GetDiskFreeSpace failed: %d", (int)GetLastError()); + return (ARCHIVE_FAILED); + } + + return (ARCHIVE_OK); +} + +static int +close_and_restore_time(HANDLE h, struct tree *t, struct restore_time *rt) +{ + HANDLE handle; + int r = 0; +#if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + CREATEFILE2_EXTENDED_PARAMETERS createExParams; +#endif + + if (h == INVALID_HANDLE_VALUE && AE_IFLNK == rt->filetype) + return (0); + + /* Close a file descriptor. + * It will not be used for SetFileTime() because it has been opened + * by a read only mode. + */ + if (h != INVALID_HANDLE_VALUE) + CloseHandle(h); + if ((t->flags & needsRestoreTimes) == 0) + return (r); + +#if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + ZeroMemory(&createExParams, sizeof(createExParams)); + createExParams.dwSize = sizeof(createExParams); + createExParams.dwFileFlags = FILE_FLAG_BACKUP_SEMANTICS; + handle = CreateFile2(rt->full_path, FILE_WRITE_ATTRIBUTES, + 0, OPEN_EXISTING, &createExParams); +#else + handle = CreateFileW(rt->full_path, FILE_WRITE_ATTRIBUTES, + 0, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); +#endif + if (handle == INVALID_HANDLE_VALUE) { + errno = EINVAL; + return (-1); + } + + if (SetFileTime(handle, NULL, &rt->lastAccessTime, + &rt->lastWriteTime) == 0) { + errno = EINVAL; + r = -1; + } else + r = 0; + CloseHandle(handle); + return (r); +} + +/* + * Add a directory path to the current stack. + */ +static void +tree_push(struct tree *t, const wchar_t *path, const wchar_t *full_path, + int filesystem_id, int64_t dev, int64_t ino, struct restore_time *rt) +{ + struct tree_entry *te; + + te = calloc(1, sizeof(*te)); + te->next = t->stack; + te->parent = t->current; + if (te->parent) + te->depth = te->parent->depth + 1; + t->stack = te; + archive_string_init(&te->name); + archive_wstrcpy(&te->name, path); + archive_string_init(&te->full_path); + archive_wstrcpy(&te->full_path, full_path); + te->flags = needsDescent | needsOpen | needsAscent; + te->filesystem_id = filesystem_id; + te->dev = dev; + te->ino = ino; + te->dirname_length = t->dirname_length; + te->full_path_dir_length = t->full_path_dir_length; + te->restore_time.full_path = te->full_path.s; + if (rt != NULL) { + te->restore_time.lastWriteTime = rt->lastWriteTime; + te->restore_time.lastAccessTime = rt->lastAccessTime; + te->restore_time.filetype = rt->filetype; + } +} + +/* + * Append a name to the current dir path. + */ +static void +tree_append(struct tree *t, const wchar_t *name, size_t name_length) +{ + size_t size_needed; + + t->path.s[t->dirname_length] = L'\0'; + t->path.length = t->dirname_length; + /* Strip trailing '/' from name, unless entire name is "/". */ + while (name_length > 1 && name[name_length - 1] == L'/') + name_length--; + + /* Resize pathname buffer as needed. */ + size_needed = name_length + t->dirname_length + 2; + archive_wstring_ensure(&t->path, size_needed); + /* Add a separating '/' if it's needed. */ + if (t->dirname_length > 0 && + t->path.s[archive_strlen(&t->path)-1] != L'/') + archive_wstrappend_wchar(&t->path, L'/'); + t->basename = t->path.s + archive_strlen(&t->path); + archive_wstrncat(&t->path, name, name_length); + t->restore_time.full_path = t->basename; + if (t->full_path_dir_length > 0) { + t->full_path.s[t->full_path_dir_length] = L'\0'; + t->full_path.length = t->full_path_dir_length; + size_needed = name_length + t->full_path_dir_length + 2; + archive_wstring_ensure(&t->full_path, size_needed); + /* Add a separating '\' if it's needed. */ + if (t->full_path.s[archive_strlen(&t->full_path)-1] != L'\\') + archive_wstrappend_wchar(&t->full_path, L'\\'); + archive_wstrncat(&t->full_path, name, name_length); + t->restore_time.full_path = t->full_path.s; + } +} + +/* + * Open a directory tree for traversal. + */ +static struct tree * +tree_open(const wchar_t *path, int symlink_mode, int restore_time) +{ + struct tree *t; + + t = calloc(1, sizeof(*t)); + archive_string_init(&(t->full_path)); + archive_string_init(&t->path); + archive_wstring_ensure(&t->path, 15); + t->initial_symlink_mode = symlink_mode; + return (tree_reopen(t, path, restore_time)); +} + +static struct tree * +tree_reopen(struct tree *t, const wchar_t *path, int restore_time) +{ + struct archive_wstring ws; + wchar_t *pathname, *p, *base; + + t->flags = (restore_time != 0)?needsRestoreTimes:0; + t->visit_type = 0; + t->tree_errno = 0; + t->full_path_dir_length = 0; + t->dirname_length = 0; + t->depth = 0; + t->descend = 0; + t->current = NULL; + t->d = INVALID_HANDLE_VALUE; + t->symlink_mode = t->initial_symlink_mode; + archive_string_empty(&(t->full_path)); + archive_string_empty(&t->path); + t->entry_fh = INVALID_HANDLE_VALUE; + t->entry_eof = 0; + t->entry_remaining_bytes = 0; + t->initial_filesystem_id = -1; + + /* Get wchar_t strings from char strings. */ + archive_string_init(&ws); + archive_wstrcpy(&ws, path); + pathname = ws.s; + /* Get a full-path-name. */ + p = __la_win_permissive_name_w(pathname); + if (p == NULL) + goto failed; + archive_wstrcpy(&(t->full_path), p); + free(p); + + /* Convert path separators from '\' to '/' */ + for (p = pathname; *p != L'\0'; ++p) { + if (*p == L'\\') + *p = L'/'; + } + base = pathname; + + /* First item is set up a lot like a symlink traversal. */ + /* printf("Looking for wildcard in %s\n", path); */ + if ((base[0] == L'/' && base[1] == L'/' && + base[2] == L'?' && base[3] == L'/' && + (wcschr(base+4, L'*') || wcschr(base+4, L'?'))) || + (!(base[0] == L'/' && base[1] == L'/' && + base[2] == L'?' && base[3] == L'/') && + (wcschr(base, L'*') || wcschr(base, L'?')))) { + // It has a wildcard in it... + // Separate the last element. + p = wcsrchr(base, L'/'); + if (p != NULL) { + *p = L'\0'; + tree_append(t, base, p - base); + t->dirname_length = archive_strlen(&t->path); + base = p + 1; + } + p = wcsrchr(t->full_path.s, L'\\'); + if (p != NULL) { + *p = L'\0'; + t->full_path.length = wcslen(t->full_path.s); + t->full_path_dir_length = archive_strlen(&t->full_path); + } + } + tree_push(t, base, t->full_path.s, 0, 0, 0, NULL); + archive_wstring_free(&ws); + t->stack->flags = needsFirstVisit; + /* + * Debug flag for Direct IO(No buffering) or Async IO. + * Those dependent on environment variable switches + * will be removed until next release. + */ + { + const char *e; + if ((e = getenv("LIBARCHIVE_DIRECT_IO")) != NULL) { + if (e[0] == '0') + t->direct_io = 0; + else + t->direct_io = 1; + fprintf(stderr, "LIBARCHIVE_DIRECT_IO=%s\n", + (t->direct_io)?"Enabled":"Disabled"); + } else + t->direct_io = DIRECT_IO; + if ((e = getenv("LIBARCHIVE_ASYNC_IO")) != NULL) { + if (e[0] == '0') + t->async_io = 0; + else + t->async_io = 1; + fprintf(stderr, "LIBARCHIVE_ASYNC_IO=%s\n", + (t->async_io)?"Enabled":"Disabled"); + } else + t->async_io = ASYNC_IO; + } + return (t); +failed: + archive_wstring_free(&ws); + tree_free(t); + return (NULL); +} + +static int +tree_descent(struct tree *t) +{ + t->dirname_length = archive_strlen(&t->path); + t->full_path_dir_length = archive_strlen(&t->full_path); + t->depth++; + return (0); +} + +/* + * We've finished a directory; ascend back to the parent. + */ +static int +tree_ascend(struct tree *t) +{ + struct tree_entry *te; + + te = t->stack; + t->depth--; + close_and_restore_time(INVALID_HANDLE_VALUE, t, &te->restore_time); + return (0); +} + +/* + * Pop the working stack. + */ +static void +tree_pop(struct tree *t) +{ + struct tree_entry *te; + + t->full_path.s[t->full_path_dir_length] = L'\0'; + t->full_path.length = t->full_path_dir_length; + t->path.s[t->dirname_length] = L'\0'; + t->path.length = t->dirname_length; + if (t->stack == t->current && t->current != NULL) + t->current = t->current->parent; + te = t->stack; + t->stack = te->next; + t->dirname_length = te->dirname_length; + t->basename = t->path.s + t->dirname_length; + t->full_path_dir_length = te->full_path_dir_length; + while (t->basename[0] == L'/') + t->basename++; + archive_wstring_free(&te->name); + archive_wstring_free(&te->full_path); + free(te); +} + +/* + * Get the next item in the tree traversal. + */ +static int +tree_next(struct tree *t) +{ + int r; + + while (t->stack != NULL) { + /* If there's an open dir, get the next entry from there. */ + if (t->d != INVALID_HANDLE_VALUE) { + r = tree_dir_next_windows(t, NULL); + if (r == 0) + continue; + return (r); + } + + if (t->stack->flags & needsFirstVisit) { + wchar_t *d = t->stack->name.s; + t->stack->flags &= ~needsFirstVisit; + if (!(d[0] == L'/' && d[1] == L'/' && + d[2] == L'?' && d[3] == L'/') && + (wcschr(d, L'*') || wcschr(d, L'?'))) { + r = tree_dir_next_windows(t, d); + if (r == 0) + continue; + return (r); + } else { + HANDLE h = FindFirstFileW(t->stack->full_path.s, &t->_findData); + if (h == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + t->tree_errno = errno; + t->visit_type = TREE_ERROR_DIR; + return (t->visit_type); + } + t->findData = &t->_findData; + FindClose(h); + } + /* Top stack item needs a regular visit. */ + t->current = t->stack; + tree_append(t, t->stack->name.s, + archive_strlen(&(t->stack->name))); + //t->dirname_length = t->path_length; + //tree_pop(t); + t->stack->flags &= ~needsFirstVisit; + return (t->visit_type = TREE_REGULAR); + } else if (t->stack->flags & needsDescent) { + /* Top stack item is dir to descend into. */ + t->current = t->stack; + tree_append(t, t->stack->name.s, + archive_strlen(&(t->stack->name))); + t->stack->flags &= ~needsDescent; + r = tree_descent(t); + if (r != 0) { + tree_pop(t); + t->visit_type = r; + } else + t->visit_type = TREE_POSTDESCENT; + return (t->visit_type); + } else if (t->stack->flags & needsOpen) { + t->stack->flags &= ~needsOpen; + r = tree_dir_next_windows(t, L"*"); + if (r == 0) + continue; + return (r); + } else if (t->stack->flags & needsAscent) { + /* Top stack item is dir and we're done with it. */ + r = tree_ascend(t); + tree_pop(t); + t->visit_type = r != 0 ? r : TREE_POSTASCENT; + return (t->visit_type); + } else { + /* Top item on stack is dead. */ + tree_pop(t); + t->flags &= ~hasLstat; + t->flags &= ~hasStat; + } + } + return (t->visit_type = 0); +} + +static int +tree_dir_next_windows(struct tree *t, const wchar_t *pattern) +{ + const wchar_t *name; + size_t namelen; + int r; + + for (;;) { + if (pattern != NULL) { + struct archive_wstring pt; + + archive_string_init(&pt); + archive_wstring_ensure(&pt, + archive_strlen(&(t->full_path)) + + 2 + wcslen(pattern)); + archive_wstring_copy(&pt, &(t->full_path)); + archive_wstrappend_wchar(&pt, L'\\'); + archive_wstrcat(&pt, pattern); + t->d = FindFirstFileW(pt.s, &t->_findData); + archive_wstring_free(&pt); + if (t->d == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + t->tree_errno = errno; + r = tree_ascend(t); /* Undo "chdir" */ + tree_pop(t); + t->visit_type = r != 0 ? r : TREE_ERROR_DIR; + return (t->visit_type); + } + t->findData = &t->_findData; + pattern = NULL; + } else if (!FindNextFileW(t->d, &t->_findData)) { + FindClose(t->d); + t->d = INVALID_HANDLE_VALUE; + t->findData = NULL; + return (0); + } + name = t->findData->cFileName; + namelen = wcslen(name); + t->flags &= ~hasLstat; + t->flags &= ~hasStat; + if (name[0] == L'.' && name[1] == L'\0') + continue; + if (name[0] == L'.' && name[1] == L'.' && name[2] == L'\0') + continue; + tree_append(t, name, namelen); + return (t->visit_type = TREE_REGULAR); + } +} + +#define EPOC_TIME ARCHIVE_LITERAL_ULL(116444736000000000) +static void +fileTimeToUtc(const FILETIME *filetime, time_t *t, long *ns) +{ + ULARGE_INTEGER utc; + + utc.HighPart = filetime->dwHighDateTime; + utc.LowPart = filetime->dwLowDateTime; + if (utc.QuadPart >= EPOC_TIME) { + utc.QuadPart -= EPOC_TIME; + /* milli seconds base */ + *t = (time_t)(utc.QuadPart / 10000000); + /* nano seconds base */ + *ns = (long)(utc.QuadPart % 10000000) * 100; + } else { + *t = 0; + *ns = 0; + } +} + +static void +entry_copy_bhfi(struct archive_entry *entry, const wchar_t *path, + const WIN32_FIND_DATAW *findData, + const BY_HANDLE_FILE_INFORMATION *bhfi) +{ + time_t secs; + long nsecs; + mode_t mode; + + fileTimeToUtc(&bhfi->ftLastAccessTime, &secs, &nsecs); + archive_entry_set_atime(entry, secs, nsecs); + fileTimeToUtc(&bhfi->ftLastWriteTime, &secs, &nsecs); + archive_entry_set_mtime(entry, secs, nsecs); + fileTimeToUtc(&bhfi->ftCreationTime, &secs, &nsecs); + archive_entry_set_birthtime(entry, secs, nsecs); + archive_entry_set_ctime(entry, secs, nsecs); + archive_entry_set_dev(entry, bhfi_dev(bhfi)); + archive_entry_set_ino64(entry, bhfi_ino(bhfi)); + if (bhfi->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + archive_entry_set_nlink(entry, bhfi->nNumberOfLinks + 1); + else + archive_entry_set_nlink(entry, bhfi->nNumberOfLinks); + archive_entry_set_size(entry, + (((int64_t)bhfi->nFileSizeHigh) << 32) + + bhfi->nFileSizeLow); + archive_entry_set_uid(entry, 0); + archive_entry_set_gid(entry, 0); + archive_entry_set_rdev(entry, 0); + + mode = S_IRUSR | S_IRGRP | S_IROTH; + if ((bhfi->dwFileAttributes & FILE_ATTRIBUTE_READONLY) == 0) + mode |= S_IWUSR | S_IWGRP | S_IWOTH; + if ((bhfi->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) && + findData != NULL && + findData->dwReserved0 == IO_REPARSE_TAG_SYMLINK) { + mode |= S_IFLNK; + entry_symlink_from_pathw(entry, path); + } else if (bhfi->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH; + else { + const wchar_t *p; + + mode |= S_IFREG; + p = wcsrchr(path, L'.'); + if (p != NULL && wcslen(p) == 4) { + switch (p[1]) { + case L'B': case L'b': + if ((p[2] == L'A' || p[2] == L'a' ) && + (p[3] == L'T' || p[3] == L't' )) + mode |= S_IXUSR | S_IXGRP | S_IXOTH; + break; + case L'C': case L'c': + if (((p[2] == L'M' || p[2] == L'm' ) && + (p[3] == L'D' || p[3] == L'd' ))) + mode |= S_IXUSR | S_IXGRP | S_IXOTH; + break; + case L'E': case L'e': + if ((p[2] == L'X' || p[2] == L'x' ) && + (p[3] == L'E' || p[3] == L'e' )) + mode |= S_IXUSR | S_IXGRP | S_IXOTH; + break; + default: + break; + } + } + } + archive_entry_set_mode(entry, mode); +} + +static void +tree_archive_entry_copy_bhfi(struct archive_entry *entry, struct tree *t, + const BY_HANDLE_FILE_INFORMATION *bhfi) +{ + entry_copy_bhfi(entry, tree_current_path(t), t->findData, bhfi); +} + +static int +tree_current_file_information(struct tree *t, BY_HANDLE_FILE_INFORMATION *st, + int sim_lstat) +{ + HANDLE h; + int r; + DWORD flag = FILE_FLAG_BACKUP_SEMANTICS; +# if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + CREATEFILE2_EXTENDED_PARAMETERS createExParams; +#endif + + if (sim_lstat && tree_current_is_physical_link(t)) + flag |= FILE_FLAG_OPEN_REPARSE_POINT; +# if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + ZeroMemory(&createExParams, sizeof(createExParams)); + createExParams.dwSize = sizeof(createExParams); + createExParams.dwFileFlags = flag; + h = CreateFile2(tree_current_access_path(t), 0, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + OPEN_EXISTING, &createExParams); +#else + h = CreateFileW(tree_current_access_path(t), 0, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, + OPEN_EXISTING, flag, NULL); +#endif + if (h == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + t->tree_errno = errno; + return (0); + } + r = GetFileInformationByHandle(h, st); + CloseHandle(h); + return (r); +} + +/* + * Get the stat() data for the entry just returned from tree_next(). + */ +static const BY_HANDLE_FILE_INFORMATION * +tree_current_stat(struct tree *t) +{ + if (!(t->flags & hasStat)) { + if (!tree_current_file_information(t, &t->st, 0)) + return NULL; + t->flags |= hasStat; + } + return (&t->st); +} + +/* + * Get the lstat() data for the entry just returned from tree_next(). + */ +static const BY_HANDLE_FILE_INFORMATION * +tree_current_lstat(struct tree *t) +{ + if (!(t->flags & hasLstat)) { + if (!tree_current_file_information(t, &t->lst, 1)) + return NULL; + t->flags |= hasLstat; + } + return (&t->lst); +} + +/* + * Test whether current entry is a dir or link to a dir. + */ +static int +tree_current_is_dir(struct tree *t) +{ + if (t->findData) + return (t->findData->dwFileAttributes + & FILE_ATTRIBUTE_DIRECTORY); + return (0); +} + +/* + * Test whether current entry is a physical directory. Usually, we + * already have at least one of stat() or lstat() in memory, so we + * use tricks to try to avoid an extra trip to the disk. + */ +static int +tree_current_is_physical_dir(struct tree *t) +{ + if (tree_current_is_physical_link(t)) + return (0); + return (tree_current_is_dir(t)); +} + +/* + * Test whether current entry is a symbolic link. + */ +static int +tree_current_is_physical_link(struct tree *t) +{ + if (t->findData) + return ((t->findData->dwFileAttributes + & FILE_ATTRIBUTE_REPARSE_POINT) && + (t->findData->dwReserved0 + == IO_REPARSE_TAG_SYMLINK)); + return (0); +} + +/* + * Test whether the same file has been in the tree as its parent. + */ +static int +tree_target_is_same_as_parent(struct tree *t, + const BY_HANDLE_FILE_INFORMATION *st) +{ + struct tree_entry *te; + int64_t dev = bhfi_dev(st); + int64_t ino = bhfi_ino(st); + + for (te = t->current->parent; te != NULL; te = te->parent) { + if (te->dev == dev && te->ino == ino) + return (1); + } + return (0); +} + +/* + * Return the access path for the entry just returned from tree_next(). + */ +static const wchar_t * +tree_current_access_path(struct tree *t) +{ + return (t->full_path.s); +} + +/* + * Return the full path for the entry just returned from tree_next(). + */ +static const wchar_t * +tree_current_path(struct tree *t) +{ + return (t->path.s); +} + +/* + * Terminate the traversal. + */ +static void +tree_close(struct tree *t) +{ + + if (t == NULL) + return; + if (t->entry_fh != INVALID_HANDLE_VALUE) { + cancel_async(t); + close_and_restore_time(t->entry_fh, t, &t->restore_time); + t->entry_fh = INVALID_HANDLE_VALUE; + } + /* Close the handle of FindFirstFileW */ + if (t->d != INVALID_HANDLE_VALUE) { + FindClose(t->d); + t->d = INVALID_HANDLE_VALUE; + t->findData = NULL; + } + /* Release anything remaining in the stack. */ + while (t->stack != NULL) + tree_pop(t); +} + +/* + * Release any resources. + */ +static void +tree_free(struct tree *t) +{ + int i; + + if (t == NULL) + return; + archive_wstring_free(&t->path); + archive_wstring_free(&t->full_path); + free(t->sparse_list); + free(t->filesystem_table); + for (i = 0; i < MAX_OVERLAPPED; i++) { + if (t->ol[i].buff) + VirtualFree(t->ol[i].buff, 0, MEM_RELEASE); + CloseHandle(t->ol[i].ol.hEvent); + } + free(t); +} + + +/* + * Populate the archive_entry with metadata from the disk. + */ +int +archive_read_disk_entry_from_file(struct archive *_a, + struct archive_entry *entry, int fd, const struct stat *st) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + const wchar_t *path; + const wchar_t *wname; + const char *name; + HANDLE h; + BY_HANDLE_FILE_INFORMATION bhfi; + DWORD fileAttributes = 0; + int r; + + archive_clear_error(_a); + wname = archive_entry_sourcepath_w(entry); + if (wname == NULL) + wname = archive_entry_pathname_w(entry); + if (wname == NULL) { + archive_set_error(&a->archive, EINVAL, + "Can't get a wide character version of the path"); + return (ARCHIVE_FAILED); + } + path = __la_win_permissive_name_w(wname); + + if (st == NULL) { + /* + * Get metadata through GetFileInformationByHandle(). + */ + if (fd >= 0) { + h = (HANDLE)_get_osfhandle(fd); + r = GetFileInformationByHandle(h, &bhfi); + if (r == 0) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "Can't GetFileInformationByHandle"); + return (ARCHIVE_FAILED); + } + entry_copy_bhfi(entry, path, NULL, &bhfi); + } else { + WIN32_FIND_DATAW findData; + DWORD flag, desiredAccess; +# if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + CREATEFILE2_EXTENDED_PARAMETERS createExParams; +#endif + + h = FindFirstFileW(path, &findData); + if (h == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "Can't FindFirstFileW"); + return (ARCHIVE_FAILED); + } + FindClose(h); + + flag = FILE_FLAG_BACKUP_SEMANTICS; + if (!a->follow_symlinks && + (findData.dwFileAttributes + & FILE_ATTRIBUTE_REPARSE_POINT) && + (findData.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) { + flag |= FILE_FLAG_OPEN_REPARSE_POINT; + desiredAccess = 0; + } else if (findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { + desiredAccess = 0; + } else + desiredAccess = GENERIC_READ; + +# if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + ZeroMemory(&createExParams, sizeof(createExParams)); + createExParams.dwSize = sizeof(createExParams); + createExParams.dwFileFlags = flag; + h = CreateFile2(path, desiredAccess, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + OPEN_EXISTING, &createExParams); +#else + h = CreateFileW(path, desiredAccess, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, + OPEN_EXISTING, flag, NULL); +#endif + if (h == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "Can't CreateFileW"); + return (ARCHIVE_FAILED); + } + r = GetFileInformationByHandle(h, &bhfi); + if (r == 0) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "Can't GetFileInformationByHandle"); + CloseHandle(h); + return (ARCHIVE_FAILED); + } + entry_copy_bhfi(entry, path, &findData, &bhfi); + } + fileAttributes = bhfi.dwFileAttributes; + } else { + archive_entry_copy_stat(entry, st); + if (st->st_mode & S_IFLNK) + entry_symlink_from_pathw(entry, path); + h = INVALID_HANDLE_VALUE; + } + + /* Lookup uname/gname */ + name = archive_read_disk_uname(_a, archive_entry_uid(entry)); + if (name != NULL) + archive_entry_copy_uname(entry, name); + name = archive_read_disk_gname(_a, archive_entry_gid(entry)); + if (name != NULL) + archive_entry_copy_gname(entry, name); + + /* + * File attributes + */ + if ((a->flags & ARCHIVE_READDISK_NO_FFLAGS) == 0) { + const int supported_attrs = + FILE_ATTRIBUTE_READONLY | + FILE_ATTRIBUTE_HIDDEN | + FILE_ATTRIBUTE_SYSTEM; + DWORD file_attrs = fileAttributes & supported_attrs; + if (file_attrs != 0) + archive_entry_set_fflags(entry, file_attrs, 0); + } + + /* + * Can this file be sparse file ? + */ + if (archive_entry_filetype(entry) != AE_IFREG + || archive_entry_size(entry) <= 0 + || archive_entry_hardlink(entry) != NULL) { + if (h != INVALID_HANDLE_VALUE && fd < 0) + CloseHandle(h); + return (ARCHIVE_OK); + } + + if (h == INVALID_HANDLE_VALUE) { + if (fd >= 0) { + h = (HANDLE)_get_osfhandle(fd); + } else { +# if _WIN32_WINNT >= 0x0602 /* _WIN32_WINNT_WIN8 */ + CREATEFILE2_EXTENDED_PARAMETERS createExParams; + ZeroMemory(&createExParams, sizeof(createExParams)); + createExParams.dwSize = sizeof(createExParams); + createExParams.dwFileFlags = FILE_FLAG_BACKUP_SEMANTICS; + h = CreateFile2(path, GENERIC_READ, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + OPEN_EXISTING, &createExParams); +#else + h = CreateFileW(path, GENERIC_READ, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, + OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); +#endif + if (h == INVALID_HANDLE_VALUE) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "Can't CreateFileW"); + return (ARCHIVE_FAILED); + } + } + r = GetFileInformationByHandle(h, &bhfi); + if (r == 0) { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "Can't GetFileInformationByHandle"); + if (h != INVALID_HANDLE_VALUE && fd < 0) + CloseHandle(h); + return (ARCHIVE_FAILED); + } + fileAttributes = bhfi.dwFileAttributes; + } + + /* Sparse file must be set a mark, FILE_ATTRIBUTE_SPARSE_FILE */ + if ((fileAttributes & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { + if (fd < 0) + CloseHandle(h); + return (ARCHIVE_OK); + } + + if ((a->flags & ARCHIVE_READDISK_NO_SPARSE) == 0) { + r = setup_sparse_from_disk(a, entry, h); + if (fd < 0) + CloseHandle(h); + } + + return (r); +} + +/* + * Windows sparse interface. + */ +#if defined(__MINGW32__) && !defined(FSCTL_QUERY_ALLOCATED_RANGES) +#define FSCTL_QUERY_ALLOCATED_RANGES 0x940CF +typedef struct { + LARGE_INTEGER FileOffset; + LARGE_INTEGER Length; +} FILE_ALLOCATED_RANGE_BUFFER; +#endif + +static int +setup_sparse_from_disk(struct archive_read_disk *a, + struct archive_entry *entry, HANDLE handle) +{ + FILE_ALLOCATED_RANGE_BUFFER range, *outranges = NULL; + size_t outranges_size; + int64_t entry_size = archive_entry_size(entry); + int exit_sts = ARCHIVE_OK; + + range.FileOffset.QuadPart = 0; + range.Length.QuadPart = entry_size; + outranges_size = 2048; + outranges = (FILE_ALLOCATED_RANGE_BUFFER *)malloc(outranges_size); + if (outranges == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Couldn't allocate memory"); + exit_sts = ARCHIVE_FATAL; + goto exit_setup_sparse; + } + + for (;;) { + DWORD retbytes; + BOOL ret; + + for (;;) { + ret = DeviceIoControl(handle, + FSCTL_QUERY_ALLOCATED_RANGES, + &range, sizeof(range), outranges, + (DWORD)outranges_size, &retbytes, NULL); + if (ret == 0 && GetLastError() == ERROR_MORE_DATA) { + free(outranges); + outranges_size *= 2; + outranges = (FILE_ALLOCATED_RANGE_BUFFER *) + malloc(outranges_size); + if (outranges == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Couldn't allocate memory"); + exit_sts = ARCHIVE_FATAL; + goto exit_setup_sparse; + } + continue; + } else + break; + } + if (ret != 0) { + if (retbytes > 0) { + DWORD i, n; + + n = retbytes / sizeof(outranges[0]); + if (n == 1 && + outranges[0].FileOffset.QuadPart == 0 && + outranges[0].Length.QuadPart == entry_size) + break;/* This is not sparse. */ + for (i = 0; i < n; i++) + archive_entry_sparse_add_entry(entry, + outranges[i].FileOffset.QuadPart, + outranges[i].Length.QuadPart); + range.FileOffset.QuadPart = + outranges[n-1].FileOffset.QuadPart + + outranges[n-1].Length.QuadPart; + range.Length.QuadPart = + entry_size - range.FileOffset.QuadPart; + if (range.Length.QuadPart > 0) + continue; + } else { + /* The entire file is a hole. Add one data block of size 0 at the end. */ + archive_entry_sparse_add_entry(entry, + entry_size, + 0); + } + break; + } else { + la_dosmaperr(GetLastError()); + archive_set_error(&a->archive, errno, + "DeviceIoControl Failed: %lu", GetLastError()); + exit_sts = ARCHIVE_FAILED; + goto exit_setup_sparse; + } + } +exit_setup_sparse: + free(outranges); + + return (exit_sts); +} + +#endif |