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Since the user has to call istream_get_buffered_data afterwards anyway,
we can do the precache lazily.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This properly maps to all of our use cases and makes istream_precache
obsolete.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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As soon as we no longer have any data to read, unlock/drop the
parent iterator_t object. Also, make sure we get the buffer
count right, not all data might have been consumed yet when
precache is called. Remove the precache/read loop in the non-sparse
case, we have already established that there is data available. If
it is insufficient, the user will simply call precache again once
it's used up, which istream_get_buffered_data forwards to a precache
call in the underlying stream.
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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Instead, go through helper functions, which in a next step can be
moved inside the implementation.
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 common pattern is used in rdsquashfs and sqfs2tar, move the code
to libsquashfs.
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 structure and functions are renamed to sqfs_xattr_* instead,
an additional helper is added to accept an encoded xattr.
Documentation and unit test are added as well.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Remove redundant initializations, reduce variable scope. At exist of
the function, try to shrink the buffer to the actual size if it got
trimmed.
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 istream_get_line function is supposed to remove the line break,
inclduing CR+LF if used. The previous implementation simply checked
the buffer when the LF was found, missing the case where the CR was
alraedy added and the LF is at the beginning of the newly loaded
data.
This commit modifies the check to inspect the line itself when it
was found, and remove the CR after the fact.
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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Instead, make the buffer const, let the user adjust the pointer and
size. The offset can then be inferred in precache.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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It touches internals of the istream, particularly the buffer, but
not of the ostream. It really belongs to istream_t.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The end goal is to remove direct buffer access from the istream_t
interfaces and make that opaque. For the tar implementation, this
already safes us needless buffer copying, as we essentially allow
the user to read-through from the underlying stream.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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In several places, there are ad-hoc istream_t implementations that
read from a memory buffer to test something else stacked on top.
This commit consolidates those ad-hoc implmentations into a proper
one in libio, and uses the chance to remove external files for some
older tests that rely on file I/O instead.
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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Because the dir_entry_t also has a flag for had links, the regular
node and hard-link node interface can be unified. This simplifies
the users of libfstree (gensquashfs, tar2sqfs) since we can simply
hose the entries from an iterator directly into the tree.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The existing istream_t wrapper is mered into this one as well, we
can open the files via the iterators open_file_ro function. Unit
tests and tar2sqfs are modified accordingly.
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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Again, with a dummy implementation for Unix and Windows backends.
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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For the native versions, this is currently dummied out, always returning
an error number. The idea is to laster wrap the libtar interface around
a directory iterator, here we need that method to support the existing
use case in tar2sqfs.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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For regular iterator types, it's a no-op, for the tree iterator,
it skips the sub tree.
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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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The fstree_mknode function is only used internally, remove the
declaration from the header and internalize it. The code using it is
consolidated into fstree.c.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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A simple unit test is added that mainly checks for the behavior of
recursing into a sub-tree and only matching the children at the end,
but not reporting the parents that don't match. The behavior is
inteded to immitate the `find` command.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Piece together the prefix path and pass it to the iterator. That way,
we get the full target paths back from the iterator and can use those
directly in the callback for filtering.
We also no longer need the root node for fstree_from_dir (always tree
root) and the callback can no longer return an error state.
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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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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Limited unit testing for the flags is added, particularly the
abillity to recurse into sub-directories, but not report the
parents as individual entries.
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 concept is simple: Use the existing, platform dependent iterator
to walk a directory. If a directory entry is encountered, recurse into
it using the open_subdir handler, reconstruct the full path for any
entries discovered using the directory stack.
An additional function is added to skip a sub-hierarchy.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of printing out error messages, return an errro ID and match
the behavior with the Windows implementation. Also, don't check first
if the struct stat says it is a link, the readlinkat() system call
will fail if it isn't. Avoid confusing the deputy.
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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This is also the reason we need to lug around the original directory
path on Windows.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of dropping the path immediately, store it inside the structure.
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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Use the next_by_type pointer to create a list of all unresolved
hard links and iterate over that list for link resolution.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead of having a file_info_t next pointer, requiring an up-cast
to tree_node_t all the time, simply add a "next_by_type" pointer to
the tree node itself, which can also be used for other purposes by
other node types and removes the need for up-casting.
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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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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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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