diff options
Diffstat (limited to 'archivers/libarchive/files/libarchive/archive_read_disk_windows.c')
| -rw-r--r-- | archivers/libarchive/files/libarchive/archive_read_disk_windows.c | 180 |
1 files changed, 178 insertions, 2 deletions
diff --git a/archivers/libarchive/files/libarchive/archive_read_disk_windows.c b/archivers/libarchive/files/libarchive/archive_read_disk_windows.c index d82048de299..4a5421f8f30 100644 --- a/archivers/libarchive/files/libarchive/archive_read_disk_windows.c +++ b/archivers/libarchive/files/libarchive/archive_read_disk_windows.c @@ -299,8 +299,155 @@ 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; + + h = CreateFileW(path, 0, FILE_SHARE_READ, NULL, OPEN_EXISTING, flag, + NULL); + 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 struct archive_vtable * archive_read_disk_vtable(void) @@ -900,6 +1047,19 @@ next_entry(struct archive_read_disk *a, struct tree *t, } /* + * 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) { @@ -1838,9 +1998,10 @@ entry_copy_bhfi(struct archive_entry *entry, const wchar_t *path, mode |= S_IWUSR | S_IWGRP | S_IWOTH; if ((bhfi->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) && findData != NULL && - findData->dwReserved0 == IO_REPARSE_TAG_SYMLINK) + findData->dwReserved0 == IO_REPARSE_TAG_SYMLINK) { mode |= S_IFLNK; - else if (bhfi->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + 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; @@ -2139,6 +2300,8 @@ archive_read_disk_entry_from_file(struct archive *_a, 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; } @@ -2151,6 +2314,19 @@ archive_read_disk_entry_from_file(struct archive *_a, 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 |