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Handling of files of unknown size is currently limited. They can't be

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used e.g. for initrd or modules. Moreover gzip handling of not
	easily seekable files is buggy. Disable unknown file size for now. May
	be inefficient but works.

	* grub-core/io/gzio.c (test_header): Always retrieve the file size.
	* grub-core/io/xzio.c (grub_xzio_open): Likewise.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-12-26 21:15:31 +01:00
parent 5c408d0f50
commit 0b2db94300
3 changed files with 24 additions and 14 deletions
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25
grub-core/io/gzio.c
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@ -212,19 +212,18 @@ test_header (grub_file_t file)
gzio->data_offset = grub_file_tell (gzio->file);
grub_file_seek (gzio->file, grub_file_size (gzio->file) - 4);
if (grub_file_seekable (gzio->file))
{
if (grub_file_read (gzio->file, &orig_len, 4) != 4)
{
grub_error (GRUB_ERR_BAD_FILE_TYPE, "unsupported gzip format");
return 0;
}
}
/* FIXME: this does not handle files whose original size is over 4GB.
But how can we know the real original size? */
file->size = grub_le_to_cpu32 (orig_len);
/* FIXME: don't do this on not easily seekable files. */
{
grub_file_seek (gzio->file, grub_file_size (gzio->file) - 4);
if (grub_file_read (gzio->file, &orig_len, 4) != 4)
{
grub_error (GRUB_ERR_BAD_FILE_TYPE, "unsupported gzip format");
return 0;
}
/* FIXME: this does not handle files whose original size is over 4GB.
But how can we know the real original size? */
file->size = grub_le_to_cpu32 (orig_len);
}
initialize_tables (file);