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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of holding the state internally, move it outside and let the
user pass it in. This allows processing multiple directories and going
back and forth between them, while also simplifying the dir reader
internals.
The sqfs_dir_reader_get_inode function can also be made more generic
to accept a reference instead of being fully state dependent.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Modify gensquashfs to pack data using an istream wrapper, similar
to tar2sqfs. To implement the no-tail-pack option, we need the file
size, so we simply open a raw handle first, and query it (using
libsquashfs API) and then create the stream wrapper. For the output
side, we create a block-processor ostream wrapper and splice it.
Since gensquashfs is the only, remaining user of the pack-a-file
functon, we can then remove it from libcommon.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Rename the open function to sqfs_file_open, use an argument for the
return pointer and pass back and error number on failure. Also add
an inermediate function to open an sqfs_file_t using a handle, similar
to the stream API. The get_file_size function is moved to the native
wrappers and some of the implementation is cleaned up a little.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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To the sqfs_data_reader_t is added, an sqfs_istream_t implementation
that internally reads through the data reader. The uses of the
data_reader_dump function are removed and the function is subsequently
removed from libcommon.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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There are several ad-hoc int/uint parsers scattered around the code,
add a single helper function for that task and replace the multiple
instances. A simple white-box test case is added for the utility
function.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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It is mainly a very thin wrapper on top of the block processor so far.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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On Unix like OSes, this saves/restores errno, on Windows both errno
and GetLastError state are saved/restored.
This should make it simpler to preserve that across function calls.
Additionally, while tracking down uses of GetLastError, some places
where the error code was printed out directly where replaced with
instances of w32_perror.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Report an error number from the implementations, change the users to
forward that error number (which also means libtar write header/link
now returns an error code) and all subsequent binaries to use
sqfs_perror() instead of relying on the function to print an error
internally.
Also, make sure to preserve errno/GetLastError() in the implementations
and print out a stringified error in sqfs_perror() if the error code
indicates an I/O error.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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istream_t becomes sqfs_istream_t and ostream_t becomes sqfs_ostream_t
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of a separate append-sparse function, simply accept NULL
as an input for append. For both Unix and Win32, a fallback needs
to be implemented. For XFRM, we can just memset the input buffer
to zero, same for the libsquashfs data writer.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Using depth-first search, we collect some crude statistics about
directory tree types (e.g. regular files, directories, device special
files and so on) and print them out after serializing the tree.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of adding special sentinel modes, simply treat hard links as
special case of symlinks, setting a flag to indicate that it is a
hard link and another flag to indicate that it has been resolved.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The single boolean created_implicitly can be replaced with a general
purpose flag field. The "children" pointer can then be hoisted directly
into the data union of tree_node_t.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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On Windows, long is a 32 bit integer, so we cannot check if the long
value is greater than UINT32_MAX. Instead, check if strtol sets errno.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The idea of the block align feature was to allow micro-managing that
some files are forcefully aligned to 1k/4k ("device block") boundaries,
hoping to improve access time at the cost of data density. The feature
was not exposed in the tools for a long time and eventuall added to the
sort file. Measurement and experimentation showed, that it in fact
worsened the read performance on a test system with an old micro SD
card as the bottle neck.
The feature is removed, and if needed, can be brought back simply by
wrapping/sub-classing the default block writer, if need be..
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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