*/
/*
- * 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.
*
*/
#include "wimlib_internal.h"
-#include "io.h"
+#include "buffer_io.h"
+#include <limits.h>
/* First 8 bytes in every WIM file. */
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 open_flags)
+/* 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;
DEBUG("Reading WIM header.");
- bytes_read = fread(buf, 1, WIM_MAGIC_LEN, fp);
+ bytes_read = full_pread(in_fd, buf, WIM_HEADER_DISK_SIZE, 0);
- if (bytes_read != WIM_MAGIC_LEN)
- goto err;
-
- /* 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;
-
- hdr_size = le32_to_cpu(hdr_size);
-
- /* Byte 12 */
-
+ /* Byte 8 */
+ p = get_u32(p + 8, &hdr_size);
if (hdr_size != WIM_HEADER_DISK_SIZE) {
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",
p = get_u16(p, &hdr->part_number);
p = get_u16(p, &hdr->total_parts);
- if (!(open_flags & WIMLIB_OPEN_FLAG_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);
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);
/* 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;
p = put_u32(p, hdr->flags);
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);
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;
}
/*
* 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) {
};
/* 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", w->hdr.part_number);
- printf("Total Parts = %hu\n", w->hdr.total_parts);
- 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);
}
git://wimlib.net / wimlib / blobdiff