X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fresource.c;h=13c1581fc866ff48e51fef709ef75887c0109c3c;hp=b5db14527bdcb8cbd9bce60a728596ca1baba692;hb=f72c1acba54c28c27e6902c3078f7a715934223b;hpb=b24275706ca80ffd423fbb91557199f7289191ac diff --git a/src/resource.c b/src/resource.c index b5db1452..13c1581f 100644 --- a/src/resource.c +++ b/src/resource.c @@ -7,27 +7,26 @@ /* * Copyright (C) 2012, 2013 Eric Biggers * - * This file is part of wimlib, a library for working with WIM files. + * This file is free software; you can redistribute it and/or modify it under + * the terms of the GNU Lesser General Public License as published by the Free + * Software Foundation; either version 3 of the License, or (at your option) any + * later version. * - * wimlib 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 file 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 Lesser General Public License for more + * details. * - * wimlib 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 - * wimlib; if not, see http://www.gnu.org/licenses/. + * You should have received a copy of the GNU Lesser General Public License + * along with this file; if not, see http://www.gnu.org/licenses/. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif -#include "wimlib.h" #include "wimlib/assert.h" +#include "wimlib/bitops.h" #include "wimlib/endianness.h" #include "wimlib/error.h" #include "wimlib/file_io.h" @@ -37,7 +36,7 @@ #include "wimlib/wim.h" #ifdef __WIN32__ -/* for read_win32_file_prefix(), read_win32_encrypted_file_prefix() */ +/* for read_winnt_file_prefix(), read_win32_encrypted_file_prefix() */ # include "wimlib/win32.h" #endif @@ -169,9 +168,9 @@ read_compressed_wim_resource(const struct wim_resource_spec * const rspec, struct filedes * const in_fd = &rspec->wim->in_fd; /* Determine if we're reading a pipable resource from a pipe or not. */ - const bool is_pipe_read = !filedes_is_seekable(in_fd); + const bool is_pipe_read = (rspec->is_pipable && !filedes_is_seekable(in_fd)); - /* Determine if the chunk table is in an altenate format. */ + /* Determine if the chunk table is in an alternate format. */ const bool alt_chunk_table = (rspec->flags & WIM_RESHDR_FLAG_PACKED_STREAMS) && !is_pipe_read; @@ -193,6 +192,7 @@ read_compressed_wim_resource(const struct wim_resource_spec * const rspec, "expected power-of-2 chunk size (got %"PRIu32")", chunk_size); ret = WIMLIB_ERR_INVALID_CHUNK_SIZE; + errno = EINVAL; goto out_free_memory; } @@ -205,13 +205,16 @@ read_compressed_wim_resource(const struct wim_resource_spec * const rspec, rspec->wim->decompressor_ctype = WIMLIB_COMPRESSION_TYPE_NONE; rspec->wim->decompressor = NULL; } else { - ret = wimlib_create_decompressor(ctype, chunk_size, NULL, + ret = wimlib_create_decompressor(ctype, chunk_size, &decompressor); - if (ret) + if (ret) { + if (ret != WIMLIB_ERR_NOMEM) + errno = EINVAL; goto out_free_memory; + } } - const u32 chunk_order = bsr32(chunk_size); + const u32 chunk_order = fls32(chunk_size); /* Calculate the total number of chunks the resource is divided into. */ const u64 num_chunks = (rspec->uncompressed_size + chunk_size - 1) >> chunk_order; @@ -323,8 +326,8 @@ read_compressed_wim_resource(const struct wim_resource_spec * const rspec, /* Now fill in chunk_offsets from the entries we have read in * chunk_tab_data. We break aliasing rules here to avoid having * to allocate yet another array. */ - typedef le64 __attribute__((may_alias)) aliased_le64_t; - typedef le32 __attribute__((may_alias)) aliased_le32_t; + typedef le64 _may_alias_attribute aliased_le64_t; + typedef le32 _may_alias_attribute aliased_le32_t; u64 * chunk_offsets_p = chunk_offsets; if (alt_chunk_table) { @@ -758,7 +761,6 @@ read_wim_stream_prefix(const struct wim_lookup_table_entry *lte, u64 size, cb, cb_ctx); } -#ifndef __WIN32__ /* This function handles reading stream data that is located in an external * file, such as a file that has been added to the WIM image through execution * of a wimlib_add_command. @@ -779,7 +781,7 @@ read_file_on_disk_prefix(const struct wim_lookup_table_entry *lte, u64 size, DEBUG("Reading %"PRIu64" bytes from \"%"TS"\"", size, lte->file_on_disk); - raw_fd = open(lte->file_on_disk, O_BINARY | O_RDONLY); + raw_fd = topen(lte->file_on_disk, O_BINARY | O_RDONLY); if (raw_fd < 0) { ERROR_WITH_ERRNO("Can't open \"%"TS"\"", lte->file_on_disk); return WIMLIB_ERR_OPEN; @@ -789,7 +791,34 @@ read_file_on_disk_prefix(const struct wim_lookup_table_entry *lte, u64 size, filedes_close(&fd); return ret; } -#endif /* !__WIN32__ */ + +#ifdef WITH_FUSE +static int +read_staging_file_prefix(const struct wim_lookup_table_entry *lte, u64 size, + consume_data_callback_t cb, void *cb_ctx) +{ + int raw_fd; + struct filedes fd; + int ret; + + wimlib_assert(size <= lte->size); + + DEBUG("Reading %"PRIu64" bytes from staging file \"%s\"", + size, lte->staging_file_name); + + raw_fd = openat(lte->staging_dir_fd, lte->staging_file_name, + O_RDONLY | O_NOFOLLOW); + if (raw_fd < 0) { + ERROR_WITH_ERRNO("Can't open staging file \"%s\"", + lte->staging_file_name); + return WIMLIB_ERR_OPEN; + } + filedes_init(&fd, raw_fd); + ret = read_raw_file_data(&fd, 0, size, cb, cb_ctx); + filedes_close(&fd); + return ret; +} +#endif /* This function handles the trivial case of reading stream data that is, in * fact, already located in an in-memory buffer. */ @@ -827,19 +856,16 @@ read_stream_prefix(const struct wim_lookup_table_entry *lte, u64 size, { static const read_stream_prefix_handler_t handlers[] = { [RESOURCE_IN_WIM] = read_wim_stream_prefix, - #ifdef __WIN32__ - [RESOURCE_IN_FILE_ON_DISK] = read_win32_file_prefix, - #else [RESOURCE_IN_FILE_ON_DISK] = read_file_on_disk_prefix, - #endif [RESOURCE_IN_ATTACHED_BUFFER] = read_buffer_prefix, #ifdef WITH_FUSE - [RESOURCE_IN_STAGING_FILE] = read_file_on_disk_prefix, + [RESOURCE_IN_STAGING_FILE] = read_staging_file_prefix, #endif #ifdef WITH_NTFS_3G [RESOURCE_IN_NTFS_VOLUME] = read_ntfs_file_prefix, #endif #ifdef __WIN32__ + [RESOURCE_IN_WINNT_FILE_ON_DISK] = read_winnt_file_prefix, [RESOURCE_WIN32_ENCRYPTED] = read_win32_encrypted_file_prefix, #endif }; @@ -988,10 +1014,12 @@ streamifier_cb(const void *chunk, size_t size, void *_ctx) wimlib_assert(size <= ctx->cur_stream->size - ctx->cur_stream_offset); if (ctx->cur_stream_offset == 0) { + /* Starting a new stream. */ DEBUG("Begin new stream (size=%"PRIu64").", ctx->cur_stream->size); - ret = (*ctx->cbs.begin_stream)(ctx->cur_stream, true, + + ret = (*ctx->cbs.begin_stream)(ctx->cur_stream, ctx->cbs.begin_stream_ctx); if (ret) return ret; @@ -1000,9 +1028,9 @@ streamifier_cb(const void *chunk, size_t size, void *_ctx) /* Consume the chunk. */ ret = (*ctx->cbs.consume_chunk)(chunk, size, ctx->cbs.consume_chunk_ctx); + ctx->cur_stream_offset += size; if (ret) return ret; - ctx->cur_stream_offset += size; if (ctx->cur_stream_offset == ctx->cur_stream->size) { /* Finished reading all the data for a stream. */ @@ -1037,8 +1065,7 @@ struct hasher_context { /* Callback for starting to read a stream while calculating its SHA1 message * digest. */ static int -hasher_begin_stream(struct wim_lookup_table_entry *lte, bool is_partial_res, - void *_ctx) +hasher_begin_stream(struct wim_lookup_table_entry *lte, void *_ctx) { struct hasher_context *ctx = _ctx; @@ -1047,8 +1074,7 @@ hasher_begin_stream(struct wim_lookup_table_entry *lte, bool is_partial_res, if (ctx->cbs.begin_stream == NULL) return 0; else - return (*ctx->cbs.begin_stream)(lte, is_partial_res, - ctx->cbs.begin_stream_ctx); + return (*ctx->cbs.begin_stream)(lte, ctx->cbs.begin_stream_ctx); } /* A consume_data_callback_t implementation that continues calculating the SHA1 @@ -1067,13 +1093,6 @@ hasher_consume_chunk(const void *chunk, size_t size, void *_ctx) return (*ctx->cbs.consume_chunk)(chunk, size, ctx->cbs.consume_chunk_ctx); } -static void -get_sha1_string(const u8 md[SHA1_HASH_SIZE], tchar *str) -{ - for (size_t i = 0; i < SHA1_HASH_SIZE; i++) - str += tsprintf(str, T("%02x"), md[i]); -} - /* Callback for finishing reading a stream while calculating its SHA1 message * digest. */ static int @@ -1108,8 +1127,8 @@ hasher_end_stream(struct wim_lookup_table_entry *lte, int status, void *_ctx) if (wimlib_print_errors) { tchar expected_hashstr[SHA1_HASH_SIZE * 2 + 1]; tchar actual_hashstr[SHA1_HASH_SIZE * 2 + 1]; - get_sha1_string(lte->hash, expected_hashstr); - get_sha1_string(hash, actual_hashstr); + sprint_hash(lte->hash, expected_hashstr); + sprint_hash(hash, actual_hashstr); ERROR("The stream is corrupted!\n" " (Expected SHA1=%"TS",\n" " got SHA1=%"TS")", @@ -1137,7 +1156,7 @@ read_full_stream_with_cbs(struct wim_lookup_table_entry *lte, { int ret; - ret = (*cbs->begin_stream)(lte, false, cbs->begin_stream_ctx); + ret = (*cbs->begin_stream)(lte, cbs->begin_stream_ctx); if (ret) return ret; @@ -1165,7 +1184,6 @@ read_full_stream_with_sha1(struct wim_lookup_table_entry *lte, .consume_chunk_ctx = &hasher_ctx, .end_stream = hasher_end_stream, .end_stream_ctx = &hasher_ctx, - }; return read_full_stream_with_cbs(lte, &hasher_cbs); } @@ -1409,7 +1427,7 @@ extract_stream(struct wim_lookup_table_entry *lte, u64 size, /* A consume_data_callback_t implementation that writes the chunk of data to a * file descriptor. */ -int +static int extract_chunk_to_fd(const void *chunk, size_t size, void *_fd_p) { struct filedes *fd = _fd_p;