#include <limits.h>
#include <string.h>
+#include <unistd.h>
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+#else
+# include <stdlib.h>
+#endif
-/* WIM magic characters, translated to a single 64-bit little endian number. */
-#define WIM_MAGIC \
- cpu_to_le64(((u64)'M' << 0) | \
- ((u64)'S' << 8) | \
- ((u64)'W' << 16) | \
- ((u64)'I' << 24) | \
- ((u64)'M' << 32) | \
- ((u64)'\0' << 40) | \
- ((u64)'\0' << 48) | \
- ((u64)'\0' << 54))
-
-/* On-disk format of the WIM header. */
-struct wim_header_disk {
-
- /* Magic characters "MSWIM\0\0\0" */
- le64 magic;
-
- /* Size of the WIM header, in bytes; WIM_HEADER_DISK_SIZE expected
- * (currently the only supported value). */
- u32 hdr_size;
-
- /* Version of the WIM file; WIM_VERSION expected (currently the only
- * supported value). */
- u32 wim_version;
-
- /* Flags for the WIM file (WIM_HDR_FLAG_*) */
- u32 wim_flags;
-
- /* Uncompressed chunk size of resources in the WIM. 0 if the WIM is
- * uncompressed. If compressed, WIM_CHUNK_SIZE is expected (currently
- * the only supported value). */
- u32 chunk_size;
-
- /* Globally unique identifier for the WIM file. Basically a bunch of
- * random bytes. */
- u8 guid[WIM_GID_LEN];
-
- /* Number of this WIM part in the split WIM file, indexed from 1, or 1
- * if the WIM is not split. */
- u16 part_number;
-
- /* Total number of parts of the split WIM file, or 1 if the WIM is not
- * split. */
- u16 total_parts;
-
- /* Number of images in the WIM. */
- u32 image_count;
-
- /* Location and size of the WIM's lookup table. */
- struct resource_entry_disk lookup_table_res_entry;
-
- /* Location and size of the WIM's XML data. */
- struct resource_entry_disk xml_data_res_entry;
-
- /* Location and size of metadata resource for the bootable image of the
- * WIM, or all zeroes if no image is bootable. */
- struct resource_entry_disk boot_metadata_res_entry;
-
- /* 1-based index of the bootable image of the WIM, or 0 if no image is
- * bootable. */
- 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
- * 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;
-
- /* Unused bytes. */
- u8 unused[60];
-} _packed_attribute;
-
-/* Reads the header from a WIM file. */
+/*
+ * Reads the header from a WIM file.
+ *
+ * @wim
+ * WIM to read the header from. @wim->in_fd must be positioned at the
+ * beginning of the file.
+ *
+ * @hdr
+ * Structure to read the header into.
+ *
+ * Return values:
+ * WIMLIB_ERR_SUCCESS (0)
+ * WIMLIB_ERR_IMAGE_COUNT
+ * WIMLIB_ERR_INVALID_PART_NUMBER
+ * WIMLIB_ERR_NOT_A_WIM_FILE
+ * WIMLIB_ERR_READ
+ * WIMLIB_ERR_UNEXPECTED_END_OF_FILE
+ * WIMLIB_ERR_UNKNOWN_VERSION
+ */
int
-read_header(const tchar *filename, int in_fd, struct wim_header *hdr)
+read_wim_header(WIMStruct *wim, struct wim_header *hdr)
{
struct wim_header_disk disk_hdr _aligned_attribute(8);
+ struct filedes *in_fd = &wim->in_fd;
+ const tchar *filename = wim->filename;
+ int ret;
+ tchar *pipe_str;
+
+ wimlib_assert(in_fd->offset == 0);
+
+ if (filename == NULL) {
+ pipe_str = alloca(40);
+ tsprintf(pipe_str, T("[fd %d]"), in_fd->fd);
+ filename = pipe_str;
+ }
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)) {
- ERROR_WITH_ERRNO("\"%"TS"\": Error reading header", filename);
- return WIMLIB_ERR_READ;
- }
-
- if (disk_hdr.magic != WIM_MAGIC) {
- ERROR("\"%"TS"\": Invalid magic characters in header", filename);
- return WIMLIB_ERR_NOT_A_WIM_FILE;
+ ret = full_read(in_fd, &disk_hdr, sizeof(disk_hdr));
+ if (ret)
+ goto read_error;
+
+ hdr->magic = le64_to_cpu(disk_hdr.magic);
+
+ if (hdr->magic != WIM_MAGIC) {
+ if (hdr->magic == PWM_MAGIC) {
+ /* Pipable WIM: Use header at end instead, unless
+ * actually reading from a pipe. */
+ if (!in_fd->is_pipe) {
+ ret = WIMLIB_ERR_READ;
+ if (-1 == lseek(in_fd->fd, -WIM_HEADER_DISK_SIZE, SEEK_END))
+ goto read_error;
+ ret = full_read(in_fd, &disk_hdr, sizeof(disk_hdr));
+ if (ret)
+ goto read_error;
+ }
+ } else {
+ ERROR("\"%"TS"\": Invalid magic characters in header", filename);
+ return WIMLIB_ERR_NOT_A_WIM_FILE;
+ }
}
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_HEADER_SIZE;
+ return WIMLIB_ERR_INVALID_HEADER;
}
- if (le32_to_cpu(disk_hdr.wim_version) != WIM_VERSION) {
- ERROR("\"%"TS"\": The WIM header says the WIM version is %u, "
- "but wimlib only knows about version %u",
- filename, le32_to_cpu(disk_hdr.wim_version), WIM_VERSION);
+ hdr->wim_version = le32_to_cpu(disk_hdr.wim_version);
+ if (hdr->wim_version != WIM_VERSION_DEFAULT &&
+ hdr->wim_version != WIM_VERSION_PACKED_STREAMS)
+ {
+ ERROR("\"%"TS"\": Unknown WIM version: %u",
+ filename, hdr->wim_version);
return WIMLIB_ERR_UNKNOWN_VERSION;
}
hdr->flags = le32_to_cpu(disk_hdr.wim_flags);
- if (le32_to_cpu(disk_hdr.chunk_size) != WIM_CHUNK_SIZE &&
- (hdr->flags & WIM_HDR_FLAG_COMPRESSION)) {
- ERROR("\"%"TS"\": Unexpected chunk size of %u! Ask the author to "
- "implement support for other chunk sizes.",
- filename, le32_to_cpu(disk_hdr.chunk_size));
- ERROR("(Or it might just be that the WIM header is invalid.)");
- return WIMLIB_ERR_INVALID_CHUNK_SIZE;
- }
-
- memcpy(hdr->guid, disk_hdr.guid, WIM_GID_LEN);
-
+ hdr->chunk_size = le32_to_cpu(disk_hdr.chunk_size);
+ memcpy(hdr->guid, disk_hdr.guid, WIM_GUID_LEN);
hdr->part_number = le16_to_cpu(disk_hdr.part_number);
hdr->total_parts = le16_to_cpu(disk_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) {
+ if (unlikely(hdr->image_count > MAX_IMAGES)) {
ERROR("\"%"TS"\": Invalid image count (%u)",
filename, hdr->image_count);
return WIMLIB_ERR_IMAGE_COUNT;
}
- get_resource_entry(&disk_hdr.lookup_table_res_entry, &hdr->lookup_table_res_entry);
- get_resource_entry(&disk_hdr.xml_data_res_entry, &hdr->xml_res_entry);
- get_resource_entry(&disk_hdr.boot_metadata_res_entry, &hdr->boot_metadata_res_entry);
+ get_wim_reshdr(&disk_hdr.lookup_table_reshdr, &hdr->lookup_table_reshdr);
+ get_wim_reshdr(&disk_hdr.xml_data_reshdr, &hdr->xml_data_reshdr);
+ get_wim_reshdr(&disk_hdr.boot_metadata_reshdr, &hdr->boot_metadata_reshdr);
hdr->boot_idx = le32_to_cpu(disk_hdr.boot_idx);
- get_resource_entry(&disk_hdr.integrity_table_res_entry, &hdr->integrity);
+ get_wim_reshdr(&disk_hdr.integrity_table_reshdr, &hdr->integrity_table_reshdr);
return 0;
+
+read_error:
+ ERROR_WITH_ERRNO("\"%"TS"\": Error reading header", filename);
+ return ret;
}
-/*
- * Writes the header for a WIM file.
- *
- * @hdr: A pointer to a struct wim_header structure that describes the header.
- * @out_fd: The file descriptor to the WIM file, opened for writing.
- *
- * Returns zero on success, nonzero on failure.
- */
+/* Writes the header for a WIM file at the specified offset. If the offset
+ * specified is the current one, the position is advanced by the size of the
+ * header. */
int
-write_header(const struct wim_header *hdr, int out_fd)
+write_wim_header_at_offset(const struct wim_header *hdr, struct filedes *out_fd,
+ off_t offset)
{
struct wim_header_disk disk_hdr _aligned_attribute(8);
- DEBUG("Writing WIM header.");
+ int ret;
- disk_hdr.magic = WIM_MAGIC;
+ DEBUG("Writing %sWIM header at offset %"PRIu64,
+ ((hdr->magic == PWM_MAGIC) ? "pipable " : ""),
+ offset);
+
+ disk_hdr.magic = cpu_to_le64(hdr->magic);
disk_hdr.hdr_size = cpu_to_le32(sizeof(struct wim_header_disk));
- disk_hdr.wim_version = cpu_to_le32(WIM_VERSION);
+ disk_hdr.wim_version = cpu_to_le32(hdr->wim_version);
disk_hdr.wim_flags = cpu_to_le32(hdr->flags);
- disk_hdr.chunk_size = cpu_to_le32((hdr->flags & WIM_HDR_FLAG_COMPRESSION) ?
- WIM_CHUNK_SIZE : 0);
- memcpy(disk_hdr.guid, hdr->guid, WIM_GID_LEN);
+ if (hdr->flags & WIM_HDR_FLAG_COMPRESSION)
+ disk_hdr.chunk_size = cpu_to_le32(hdr->chunk_size);
+ else
+ disk_hdr.chunk_size = 0;
+ memcpy(disk_hdr.guid, hdr->guid, WIM_GUID_LEN);
disk_hdr.part_number = cpu_to_le16(hdr->part_number);
disk_hdr.total_parts = cpu_to_le16(hdr->total_parts);
disk_hdr.image_count = cpu_to_le32(hdr->image_count);
- put_resource_entry(&hdr->lookup_table_res_entry, &disk_hdr.lookup_table_res_entry);
- put_resource_entry(&hdr->xml_res_entry, &disk_hdr.xml_data_res_entry);
- put_resource_entry(&hdr->boot_metadata_res_entry, &disk_hdr.boot_metadata_res_entry);
+ put_wim_reshdr(&hdr->lookup_table_reshdr, &disk_hdr.lookup_table_reshdr);
+ put_wim_reshdr(&hdr->xml_data_reshdr, &disk_hdr.xml_data_reshdr);
+ put_wim_reshdr(&hdr->boot_metadata_reshdr, &disk_hdr.boot_metadata_reshdr);
disk_hdr.boot_idx = cpu_to_le32(hdr->boot_idx);
- put_resource_entry(&hdr->integrity, &disk_hdr.integrity_table_res_entry);
+ put_wim_reshdr(&hdr->integrity_table_reshdr, &disk_hdr.integrity_table_reshdr);
memset(disk_hdr.unused, 0, sizeof(disk_hdr.unused));
- if (full_pwrite(out_fd, &disk_hdr, sizeof(disk_hdr), 0) != sizeof(disk_hdr)) {
+ if (offset == out_fd->offset)
+ ret = full_write(out_fd, &disk_hdr, sizeof(disk_hdr));
+ else
+ ret = full_pwrite(out_fd, &disk_hdr, sizeof(disk_hdr), offset);
+ if (ret)
ERROR_WITH_ERRNO("Failed to write WIM header");
- return WIMLIB_ERR_WRITE;
- }
- DEBUG("Done writing WIM header");
- return 0;
+ return ret;
+}
+
+/* Writes the header for a WIM file at the output file descriptor's current
+ * offset. */
+int
+write_wim_header(const struct wim_header *hdr, struct filedes *out_fd)
+{
+ return write_wim_header_at_offset(hdr, out_fd, out_fd->offset);
}
/* Update just the wim_flags field. */
int
-write_header_flags(u32 hdr_flags, int out_fd)
+write_wim_header_flags(u32 hdr_flags, struct filedes *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;
- }
+ return full_pwrite(out_fd, &flags, sizeof(flags),
+ offsetof(struct wim_header_disk, wim_flags));
}
-/* Update just the part_number and total_parts fields. */
int
-write_header_part_data(u16 part_number, u16 total_parts, int out_fd)
+set_wim_hdr_cflags(int ctype, struct wim_header *hdr)
{
- 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 {
+ hdr->flags &= ~(WIM_HDR_FLAG_COMPRESSION |
+ WIM_HDR_FLAG_COMPRESS_LZX |
+ WIM_HDR_FLAG_COMPRESS_RESERVED |
+ WIM_HDR_FLAG_COMPRESS_XPRESS |
+ WIM_HDR_FLAG_COMPRESS_LZMS |
+ WIM_HDR_FLAG_COMPRESS_XPRESS_2);
+ switch (ctype) {
+
+ case WIMLIB_COMPRESSION_TYPE_NONE:
+ return 0;
+
+ case WIMLIB_COMPRESSION_TYPE_LZX:
+ hdr->flags |= WIM_HDR_FLAG_COMPRESSION | WIM_HDR_FLAG_COMPRESS_LZX;
return 0;
+
+ case WIMLIB_COMPRESSION_TYPE_XPRESS:
+ hdr->flags |= WIM_HDR_FLAG_COMPRESSION | WIM_HDR_FLAG_COMPRESS_XPRESS;
+ return 0;
+
+ case WIMLIB_COMPRESSION_TYPE_LZMS:
+ hdr->flags |= WIM_HDR_FLAG_COMPRESSION | WIM_HDR_FLAG_COMPRESS_LZMS;
+ return 0;
+
+ default:
+ return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
}
}
* Initializes the header for a WIM file.
*/
int
-init_header(struct wim_header *hdr, int ctype)
+init_wim_header(struct wim_header *hdr, int ctype, u32 chunk_size)
{
memset(hdr, 0, sizeof(struct wim_header));
- switch (ctype) {
- case WIMLIB_COMPRESSION_TYPE_NONE:
- hdr->flags = 0;
- break;
- case WIMLIB_COMPRESSION_TYPE_LZX:
- hdr->flags = WIM_HDR_FLAG_COMPRESSION |
- WIM_HDR_FLAG_COMPRESS_LZX;
- break;
- case WIMLIB_COMPRESSION_TYPE_XPRESS:
- hdr->flags = WIM_HDR_FLAG_COMPRESSION |
- WIM_HDR_FLAG_COMPRESS_XPRESS;
- break;
- default:
+ hdr->magic = WIM_MAGIC;
+
+ if (ctype == WIMLIB_COMPRESSION_TYPE_LZMS)
+ hdr->wim_version = WIM_VERSION_PACKED_STREAMS;
+ else
+ hdr->wim_version = WIM_VERSION_DEFAULT;
+ if (set_wim_hdr_cflags(ctype, hdr)) {
ERROR("Invalid compression type specified (%d)", ctype);
return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
}
+ hdr->chunk_size = chunk_size;
hdr->total_parts = 1;
hdr->part_number = 1;
randomize_byte_array(hdr->guid, sizeof(hdr->guid));
const char *name;
};
struct hdr_flag hdr_flags[] = {
- {WIM_HDR_FLAG_RESERVED, "RESERVED"},
+ {WIM_HDR_FLAG_RESERVED, "RESERVED"},
{WIM_HDR_FLAG_COMPRESSION, "COMPRESSION"},
{WIM_HDR_FLAG_READONLY, "READONLY"},
{WIM_HDR_FLAG_SPANNED, "SPANNED"},
{WIM_HDR_FLAG_COMPRESS_RESERVED,"COMPRESS_RESERVED"},
{WIM_HDR_FLAG_COMPRESS_LZX, "COMPRESS_LZX"},
{WIM_HDR_FLAG_COMPRESS_XPRESS, "COMPRESS_XPRESS"},
+ {WIM_HDR_FLAG_COMPRESS_LZMS, "COMPRESS_LZMS"},
+ {WIM_HDR_FLAG_COMPRESS_XPRESS_2,"COMPRESS_XPRESS_2"},
};
-/* Prints information from the header of the WIM file associated with @wim. */
+/* API function documented in wimlib.h */
WIMLIBAPI void
wimlib_print_header(const WIMStruct *wim)
{
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);
+ tprintf(T("Version = 0x%x\n"), hdr->wim_version);
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)
tprintf(T(" WIM_HDR_FLAG_%s is set\n"), hdr_flags[i].name);
- tprintf(T("Chunk Size = %u\n"), WIM_CHUNK_SIZE);
+ tprintf(T("Chunk Size = %u\n"), hdr->chunk_size);
tfputs (T("GUID = "), stdout);
- print_byte_field(hdr->guid, WIM_GID_LEN, stdout);
+ print_byte_field(hdr->guid, WIM_GUID_LEN, stdout);
tputchar(T('\n'));
- tprintf(T("Part Number = %hu\n"), wim->hdr.part_number);
- tprintf(T("Total Parts = %hu\n"), wim->hdr.total_parts);
+ tprintf(T("Part Number = %hu\n"), hdr->part_number);
+ tprintf(T("Total Parts = %hu\n"), 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);
+ (u64)hdr->lookup_table_reshdr.size_in_wim);
tprintf(T("Lookup Table Flags = 0x%hhx\n"),
- (u8)hdr->lookup_table_res_entry.flags);
+ (u8)hdr->lookup_table_reshdr.flags);
tprintf(T("Lookup Table Offset = %"PRIu64"\n"),
- hdr->lookup_table_res_entry.offset);
+ hdr->lookup_table_reshdr.offset_in_wim);
tprintf(T("Lookup Table Original_size = %"PRIu64"\n"),
- hdr->lookup_table_res_entry.original_size);
+ hdr->lookup_table_reshdr.uncompressed_size);
tprintf(T("XML Data Size = %"PRIu64"\n"),
- (u64)hdr->xml_res_entry.size);
+ (u64)hdr->xml_data_reshdr.size_in_wim);
tprintf(T("XML Data Flags = 0x%hhx\n"),
- (u8)hdr->xml_res_entry.flags);
+ (u8)hdr->xml_data_reshdr.flags);
tprintf(T("XML Data Offset = %"PRIu64"\n"),
- hdr->xml_res_entry.offset);
+ hdr->xml_data_reshdr.offset_in_wim);
tprintf(T("XML Data Original Size = %"PRIu64"\n"),
- hdr->xml_res_entry.original_size);
+ hdr->xml_data_reshdr.uncompressed_size);
tprintf(T("Boot Metadata Size = %"PRIu64"\n"),
- (u64)hdr->boot_metadata_res_entry.size);
+ (u64)hdr->boot_metadata_reshdr.size_in_wim);
tprintf(T("Boot Metadata Flags = 0x%hhx\n"),
- (u8)hdr->boot_metadata_res_entry.flags);
+ (u8)hdr->boot_metadata_reshdr.flags);
tprintf(T("Boot Metadata Offset = %"PRIu64"\n"),
- hdr->boot_metadata_res_entry.offset);
+ hdr->boot_metadata_reshdr.offset_in_wim);
tprintf(T("Boot Metadata Original Size = %"PRIu64"\n"),
- hdr->boot_metadata_res_entry.original_size);
+ hdr->boot_metadata_reshdr.uncompressed_size);
tprintf(T("Boot Index = %u\n"), hdr->boot_idx);
tprintf(T("Integrity Size = %"PRIu64"\n"),
- (u64)hdr->integrity.size);
+ (u64)hdr->integrity_table_reshdr.size_in_wim);
tprintf(T("Integrity Flags = 0x%hhx\n"),
- (u8)hdr->integrity.flags);
+ (u8)hdr->integrity_table_reshdr.flags);
tprintf(T("Integrity Offset = %"PRIu64"\n"),
- hdr->integrity.offset);
+ hdr->integrity_table_reshdr.offset_in_wim);
tprintf(T("Integrity Original_size = %"PRIu64"\n"),
- hdr->integrity.original_size);
+ hdr->integrity_table_reshdr.uncompressed_size);
}
git://wimlib.net / wimlib / blobdiff