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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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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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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Move the error handling to the end of the function, make sure we
properly handle all allocation failures.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The glob function and everything associated is moved to a separate
file, the entry point exposed any the special case handling is removed
from the other callbacks in fstree_from_file.c
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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Create the directory iterator externally and pass it to fstree_from_dir.
The unit test is also removed, because the heavy lifting is now done
outside the function.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This way, we can remove the discard_node function and simplify the
scan_dir code further.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The logic was previously there to allow recursing into directories
that exist in the fstree and the scanned directory, but not create
new directories. Because the dir_tree_iterator_t supports reporting
contents but not directories (and does DFS), we can simply check if
the parent of the directory exists. Under normal DFS, it must exist,
because we created it earlier. If we are skipping the directory
entries, it only exists if it was there earlier and we can skip
entries that have a non-existant parent, retainint the old behavior.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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It is only used in the glob function, so assemble the path there and
jus tuse fstree_from_dir.
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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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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When inserting the selected entry, the next_by_type pointer is
supposed to be cleared, but the code accidentaly broke up the
next pointer, removing the element from the tree.
Fixes: e1e655b02f6c54177f9070eeb221ab95c6d4e20f
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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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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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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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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If we look at a sub directory, piece totether the full path and open
that instead. This allows us to move the directory open into the scan
function and get rid of the dirfd trickery. Also pull the recusion
step out into the parent function.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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