X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fheader.c;h=70abf2f27dee701dcdb97c71556f135b9607df66;hp=7cd25b1158cbba214a29f030acb27e544e0f8f55;hb=4f8059f2d0a74a9922128b162d9c9343b305999c;hpb=6f7956a06fcf92a304fae93e393e8eaee34e92d5 diff --git a/src/header.c b/src/header.c index 7cd25b11..70abf2f2 100644 --- a/src/header.c +++ b/src/header.c @@ -5,83 +5,69 @@ */ /* - * Copyright (C) 2010 Carl Thijssen - * Copyright (C) 2012 Eric Biggers + * Copyright (C) 2012, 2013 Eric Biggers * * This file is part of wimlib, a library for working with WIM files. * * wimlib 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 2.1 of the License, or (at your option) + * 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. * * 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 Lesser General Public License for more + * A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * - * You should have received a copy of the GNU Lesser General Public License + * You should have received a copy of the GNU General Public License * along with wimlib; if not, see http://www.gnu.org/licenses/. */ #include "wimlib_internal.h" -#include "io.h" +#include "buffer_io.h" +#include /* First 8 bytes in every WIM file. */ -static const u8 wim_magic_chars[WIM_MAGIC_LEN] = { +static const u8 wim_magic_chars[WIM_MAGIC_LEN] = { 'M', 'S', 'W', 'I', 'M', '\0', '\0', '\0' }; -/* Reads the header for a WIM file. */ -int read_header(FILE *fp, struct wim_header *hdr, int split_ok) +/* Reads the header from a WIM file. */ +int +read_header(int in_fd, struct wim_header *hdr, int open_flags) { size_t bytes_read; u8 buf[WIM_HEADER_DISK_SIZE]; - size_t hdr_rem_size; - const u8 *p; + const void *p; u32 hdr_size; u32 wim_version; u32 chunk_size; DEBUG("Reading WIM header."); - - bytes_read = fread(buf, 1, WIM_MAGIC_LEN, fp); - if (bytes_read != WIM_MAGIC_LEN) - goto err; + bytes_read = full_pread(in_fd, buf, WIM_HEADER_DISK_SIZE, 0); - /* Byte 8 */ + if (bytes_read != WIM_HEADER_DISK_SIZE) { + ERROR_WITH_ERRNO("Error reading WIM header"); + return WIMLIB_ERR_READ; + } - if (memcmp(buf, wim_magic_chars, WIM_MAGIC_LEN) != 0) { + p = buf; + if (memcmp(p, wim_magic_chars, WIM_MAGIC_LEN)) { ERROR("Invalid magic characters in WIM header"); return WIMLIB_ERR_NOT_A_WIM_FILE; } - bytes_read = fread(&hdr_size, 1, sizeof(u32), fp); - if (bytes_read != sizeof(u32)) - goto err; - - TO_LE32(hdr_size); - - /* Byte 12 */ - + /* Byte 8 */ + p = get_u32(p + 8, &hdr_size); if (hdr_size != WIM_HEADER_DISK_SIZE) { - DEBUG("ERROR: Header is size %u (expected %u)", + ERROR("Header is %u bytes (expected %u bytes)", hdr_size, WIM_HEADER_DISK_SIZE); return WIMLIB_ERR_INVALID_HEADER_SIZE; } - /* Read the rest of the header into a buffer. */ - - hdr_rem_size = WIM_HEADER_DISK_SIZE - WIM_MAGIC_LEN - sizeof(u32); - - bytes_read = fread(buf + WIM_MAGIC_LEN + sizeof(u32), 1, - hdr_rem_size, fp); - if (bytes_read != hdr_rem_size) - goto err; - + /* Byte 12 */ p = get_u32(buf + WIM_MAGIC_LEN + sizeof(u32), &wim_version); - if (wim_version != WIM_VERSION) { ERROR("The WIM header says the WIM version is %u, but wimlib " "only knows about version %u", @@ -91,13 +77,12 @@ int read_header(FILE *fp, struct wim_header *hdr, int split_ok) p = get_u32(p, &hdr->flags); p = get_u32(p, &chunk_size); - if (chunk_size != WIM_CHUNK_SIZE && + if (chunk_size != WIM_CHUNK_SIZE && (hdr->flags & WIM_HDR_FLAG_COMPRESSION)) { ERROR("Unexpected chunk size of %u! Ask the author to " "implement support for other chunk sizes.", chunk_size); - ERROR("(Or it might just be that the WIM header is " - "invalid.)", chunk_size); + ERROR("(Or it might just be that the WIM header is invalid.)"); return WIMLIB_ERR_INVALID_CHUNK_SIZE; } @@ -105,7 +90,18 @@ int read_header(FILE *fp, struct wim_header *hdr, int split_ok) p = get_u16(p, &hdr->part_number); p = get_u16(p, &hdr->total_parts); - if (!split_ok && (hdr->part_number != 1 || hdr->total_parts != 1)) { + if (hdr->total_parts == 0 || + hdr->part_number == 0 || + hdr->part_number > hdr->total_parts) + { + ERROR("Invalid WIM part number: %hu of %hu", + hdr->part_number, hdr->total_parts); + return WIMLIB_ERR_INVALID_PART_NUMBER; + } + + if (!(open_flags & WIMLIB_OPEN_FLAG_SPLIT_OK) && + hdr->total_parts != 1) + { ERROR("This WIM is part %u of a %u-part WIM", hdr->part_number, hdr->total_parts); return WIMLIB_ERR_SPLIT_UNSUPPORTED; @@ -116,6 +112,11 @@ int read_header(FILE *fp, struct wim_header *hdr, int split_ok) DEBUG("part_number = %u, total_parts = %u, image_count = %u", hdr->part_number, hdr->total_parts, hdr->image_count); + if (hdr->image_count >= INT_MAX) { + ERROR("Invalid image count (%u)", hdr->image_count); + return WIMLIB_ERR_IMAGE_COUNT; + } + /* Byte 48 */ p = get_resource_entry(p, &hdr->lookup_table_res_entry); @@ -137,24 +138,18 @@ int read_header(FILE *fp, struct wim_header *hdr, int split_ok) /* Byte 208 */ return 0; - -err: - if (feof(fp)) - ERROR("Unexpected EOF while reading WIM header"); - else - ERROR_WITH_ERRNO("Error reading WIM header"); - return WIMLIB_ERR_READ; } -/* +/* * Writes the header for a WIM file. * * @hdr: A pointer to a struct wim_header structure that describes the header. - * @out: The FILE* for the output file, positioned at the appropriate - * place (the beginning of the file). - * @return: Zero on success, nonzero on failure. + * @out_fd: The file descriptor to the WIM file, opened for writing. + * + * Returns zero on success, nonzero on failure. */ -int write_header(const struct wim_header *hdr, FILE *out_fp) +int +write_header(const struct wim_header *hdr, int out_fd) { u8 buf[WIM_HEADER_DISK_SIZE]; u8 *p; @@ -164,14 +159,14 @@ int write_header(const struct wim_header *hdr, FILE *out_fp) p = put_u32(p, WIM_HEADER_DISK_SIZE); p = put_u32(p, WIM_VERSION); p = put_u32(p, hdr->flags); - p = put_u32(p, (hdr->flags & WIM_HDR_FLAG_COMPRESSION) ? + p = put_u32(p, (hdr->flags & WIM_HDR_FLAG_COMPRESSION) ? WIM_CHUNK_SIZE : 0); - /* byte 24 */ + /* Byte 24 */ p = put_bytes(p, WIM_GID_LEN, hdr->guid); p = put_u16(p, hdr->part_number); - /* byte 40 */ + /* Byte 40 */ p = put_u16(p, hdr->total_parts); p = put_u32(p, hdr->image_count); @@ -180,30 +175,34 @@ int write_header(const struct wim_header *hdr, FILE *out_fp) p = put_resource_entry(p, &hdr->boot_metadata_res_entry); p = put_u32(p, hdr->boot_idx); p = put_resource_entry(p, &hdr->integrity); - memset(p, 0, WIM_UNUSED_LEN); - if (fwrite(buf, 1, sizeof(buf), out_fp) != sizeof(buf)) { + p = put_zeroes(p, WIM_UNUSED_LEN); + wimlib_assert(p - buf == sizeof(buf)); + + if (full_pwrite(out_fd, buf, sizeof(buf), 0) != sizeof(buf)) { ERROR_WITH_ERRNO("Failed to write WIM header"); return WIMLIB_ERR_WRITE; } + DEBUG("Done writing WIM header"); return 0; } /* * Initializes the header for a WIM file. */ -int init_header(struct wim_header *hdr, int ctype) +int +init_header(struct wim_header *hdr, int ctype) { memset(hdr, 0, sizeof(struct wim_header)); switch (ctype) { - case WIM_COMPRESSION_TYPE_NONE: + case WIMLIB_COMPRESSION_TYPE_NONE: hdr->flags = 0; break; - case WIM_COMPRESSION_TYPE_LZX: - hdr->flags = WIM_HDR_FLAG_COMPRESSION | + case WIMLIB_COMPRESSION_TYPE_LZX: + hdr->flags = WIM_HDR_FLAG_COMPRESSION | WIM_HDR_FLAG_COMPRESS_LZX; break; - case WIM_COMPRESSION_TYPE_XPRESS: - hdr->flags = WIM_HDR_FLAG_COMPRESSION | + case WIMLIB_COMPRESSION_TYPE_XPRESS: + hdr->flags = WIM_HDR_FLAG_COMPRESSION | WIM_HDR_FLAG_COMPRESS_XPRESS; break; default: @@ -235,58 +234,58 @@ struct hdr_flag hdr_flags[] = { }; /* Prints information from the header of the WIM file associated with @w. */ -WIMLIBAPI void wimlib_print_header(const WIMStruct *w) +WIMLIBAPI void +wimlib_print_header(const WIMStruct *w) { const struct wim_header *hdr = &w->hdr; - uint i; - printf("Magic Characters = MSWIM\\000\\000\\000\n"); - printf("Header Size = %u\n", WIM_HEADER_DISK_SIZE); - printf("Version = 0x%x\n", WIM_VERSION); + tprintf(T("Magic Characters = MSWIM\\000\\000\\000\n")); + tprintf(T("Header Size = %u\n"), WIM_HEADER_DISK_SIZE); + tprintf(T("Version = 0x%x\n"), WIM_VERSION); - printf("Flags = 0x%x\n", hdr->flags); - for (i = 0; i < ARRAY_LEN(hdr_flags); i++) + tprintf(T("Flags = 0x%x\n"), hdr->flags); + for (size_t i = 0; i < ARRAY_LEN(hdr_flags); i++) if (hdr_flags[i].flag & hdr->flags) - printf(" WIM_HDR_FLAG_%s is set\n", hdr_flags[i].name); - - printf("Chunk Size = %u\n", WIM_CHUNK_SIZE); - fputs ("GUID = ", stdout); - print_byte_field(hdr->guid, WIM_GID_LEN); - putchar('\n'); - printf("Part Number = %hu\n", 1); - printf("Total Parts = %hu\n", 1); - printf("Image Count = %u\n", hdr->image_count); - printf("Lookup Table Size = %"PRIu64"\n", + tprintf(T(" WIM_HDR_FLAG_%s is set\n"), hdr_flags[i].name); + + tprintf(T("Chunk Size = %u\n"), WIM_CHUNK_SIZE); + tfputs (T("GUID = "), stdout); + print_byte_field(hdr->guid, WIM_GID_LEN, stdout); + tputchar(T('\n')); + tprintf(T("Part Number = %hu\n"), w->hdr.part_number); + tprintf(T("Total Parts = %hu\n"), w->hdr.total_parts); + tprintf(T("Image Count = %u\n"), hdr->image_count); + tprintf(T("Lookup Table Size = %"PRIu64"\n"), (u64)hdr->lookup_table_res_entry.size); - printf("Lookup Table Flags = 0x%hhx\n", - hdr->lookup_table_res_entry.flags); - printf("Lookup Table Offset = %"PRIu64"\n", + tprintf(T("Lookup Table Flags = 0x%hhx\n"), + (u8)hdr->lookup_table_res_entry.flags); + tprintf(T("Lookup Table Offset = %"PRIu64"\n"), hdr->lookup_table_res_entry.offset); - printf("Lookup Table Original_size = %"PRIu64"\n", + tprintf(T("Lookup Table Original_size = %"PRIu64"\n"), hdr->lookup_table_res_entry.original_size); - printf("XML Data Size = %"PRIu64"\n", + tprintf(T("XML Data Size = %"PRIu64"\n"), (u64)hdr->xml_res_entry.size); - printf("XML Data Flags = 0x%hhx\n", - hdr->xml_res_entry.flags); - printf("XML Data Offset = %"PRIu64"\n", + tprintf(T("XML Data Flags = 0x%hhx\n"), + (u8)hdr->xml_res_entry.flags); + tprintf(T("XML Data Offset = %"PRIu64"\n"), hdr->xml_res_entry.offset); - printf("XML Data Original Size = %"PRIu64"\n", + tprintf(T("XML Data Original Size = %"PRIu64"\n"), hdr->xml_res_entry.original_size); - printf("Boot Metadata Size = %"PRIu64"\n", + tprintf(T("Boot Metadata Size = %"PRIu64"\n"), (u64)hdr->boot_metadata_res_entry.size); - printf("Boot Metadata Flags = 0x%hhx\n", - hdr->boot_metadata_res_entry.flags); - printf("Boot Metadata Offset = %"PRIu64"\n", + tprintf(T("Boot Metadata Flags = 0x%hhx\n"), + (u8)hdr->boot_metadata_res_entry.flags); + tprintf(T("Boot Metadata Offset = %"PRIu64"\n"), hdr->boot_metadata_res_entry.offset); - printf("Boot Metadata Original Size = %"PRIu64"\n", + tprintf(T("Boot Metadata Original Size = %"PRIu64"\n"), hdr->boot_metadata_res_entry.original_size); - printf("Boot Index = %u\n", hdr->boot_idx); - printf("Integrity Size = %"PRIu64"\n", - (u64)hdr->integrity.size); - printf("Integrity Flags = 0x%hhx\n", - hdr->integrity.flags); - printf("Integrity Offset = %"PRIu64"\n", - hdr->integrity.offset); - printf("Integrity Original_size = %"PRIu64"\n", - hdr->integrity.original_size); + tprintf(T("Boot Index = %u\n"), hdr->boot_idx); + tprintf(T("Integrity Size = %"PRIu64"\n"), + (u64)hdr->integrity.size); + tprintf(T("Integrity Flags = 0x%hhx\n"), + (u8)hdr->integrity.flags); + tprintf(T("Integrity Offset = %"PRIu64"\n"), + hdr->integrity.offset); + tprintf(T("Integrity Original_size = %"PRIu64"\n"), + hdr->integrity.original_size); }