* the only supported value). */
u32 chunk_size;
- /* Globally unique identifier for the WIM file. Basically bunch of
+ /* Globally unique identifier for the WIM file. Basically a bunch of
* random bytes. */
u8 guid[WIM_GID_LEN];
u32 boot_idx;
/* Location and size of the WIM's integrity table, or all zeroes if the
- * WIM has no integrity table. */
-
- /* Note the integrity_table_res_entry here is 4-byte aligned even though
+ * WIM has no integrity table.
+ *
+ * Note the integrity_table_res_entry here is 4-byte aligned even though
* it would ordinarily be 8-byte aligned--- hence, the _packed_attribute
* on the `struct wim_header_disk' is essential. */
struct resource_entry_disk integrity_table_res_entry;
/* Reads the header from a WIM file. */
int
-read_header(const tchar *filename, int in_fd,
- struct wim_header *hdr, int open_flags)
+read_header(const tchar *filename, int in_fd, struct wim_header *hdr)
{
struct wim_header_disk disk_hdr _aligned_attribute(8);
+ BUILD_BUG_ON(sizeof(struct wim_header_disk) != WIM_HEADER_DISK_SIZE);
+
DEBUG("Reading WIM header from \"%"TS"\"", filename);
if (full_pread(in_fd, &disk_hdr, sizeof(disk_hdr), 0) != sizeof(disk_hdr)) {
return WIMLIB_ERR_NOT_A_WIM_FILE;
}
- BUILD_BUG_ON(sizeof(struct wim_header_disk) != WIM_HEADER_DISK_SIZE);
if (le32_to_cpu(disk_hdr.hdr_size) != sizeof(struct wim_header_disk)) {
ERROR("\"%"TS"\": Header size is invalid (%u bytes)",
filename, le32_to_cpu(disk_hdr.hdr_size));
return WIMLIB_ERR_INVALID_PART_NUMBER;
}
- if (!(open_flags & WIMLIB_OPEN_FLAG_SPLIT_OK) && hdr->total_parts != 1)
- {
- ERROR("\"%"TS"\": This WIM is part %u of a %u-part WIM",
- filename, hdr->part_number, hdr->total_parts);
- return WIMLIB_ERR_SPLIT_UNSUPPORTED;
- }
-
hdr->image_count = le32_to_cpu(disk_hdr.image_count);
DEBUG("part_number = %u, total_parts = %u, image_count = %u",
return 0;
}
+/* Update just the wim_flags field. */
+int
+write_header_flags(u32 hdr_flags, int out_fd)
+{
+ le32 flags = cpu_to_le32(hdr_flags);
+ if (full_pwrite(out_fd, &flags, sizeof(flags),
+ offsetof(struct wim_header_disk, wim_flags)) != sizeof(flags))
+ {
+ return WIMLIB_ERR_WRITE;
+ } else {
+ return 0;
+ }
+
+}
+
+/* Update just the part_number and total_parts fields. */
+int
+write_header_part_data(u16 part_number, u16 total_parts, int out_fd)
+{
+ le16 part_data[2] = {
+ cpu_to_le16(part_number),
+ cpu_to_le16(total_parts),
+ };
+ if (full_pwrite(out_fd, &part_data, sizeof(part_data),
+ offsetof(struct wim_header_disk, part_number)) != sizeof(part_data))
+ {
+ return WIMLIB_ERR_WRITE;
+ } else {
+ return 0;
+ }
+}
+
/*
* Initializes the header for a WIM file.
*/
{WIM_HDR_FLAG_COMPRESS_XPRESS, "COMPRESS_XPRESS"},
};
-/* Prints information from the header of the WIM file associated with @w. */
+/* Prints information from the header of the WIM file associated with @wim. */
WIMLIBAPI void
-wimlib_print_header(const WIMStruct *w)
+wimlib_print_header(const WIMStruct *wim)
{
- const struct wim_header *hdr = &w->hdr;
+ const struct wim_header *hdr = &wim->hdr;
tprintf(T("Magic Characters = MSWIM\\000\\000\\000\n"));
tprintf(T("Header Size = %u\n"), WIM_HEADER_DISK_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("Part Number = %hu\n"), wim->hdr.part_number);
+ tprintf(T("Total Parts = %hu\n"), wim->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);