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After we've been hit by Large File Support problems several times in
the past week (which only occur on 32 bit platforms, which I don't
have), this is yet another attempt to fix the issue.
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Check ferror() instead of the fprintf() return value.
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Changed songvec_load() to song_load(). Added start and end markers
for each song. Removed the "key" line, it's redundant.
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Use a single GString buffer object in all functions loading the
database. Enlarge it automatically for long lines. This eliminates
the maximum line length for tag values. There is still an upper limit
of 512 kB to prevent denial of service, but that's reasonable I guess.
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Allocate the directory object after the "directory:" line. Assign the
mtime from the input file to this new object, instead of to the parent
directory.
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Fix a minor memory leak in the error handler.
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The old code tried to recover, but what's the point of that? If a
directory is duplicate, something is wrong with the database file.
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Renamed functions.
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This updates the copyright header to all be the same, which is
pretty much an update of where to mail request for a copy of the GPL
and the years of the MPD project. This also puts all committers under
'The Music Player Project' umbrella. These entries should go
individually in the AUTHORS file, for consistancy.
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Do error reporting with GLib's GError library in this library, too.
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Remember the modification time of each directory. This is important
for archives (which are virtual directories right now), but may also
be useful for an automatic update mechanism.
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Moved some of them to to directory_save.c, and others to database.c.
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directory_is_root() is cheaper than
isRootDirectory(directory_get_path()).
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Only include headers which are really needed. os_compat.h aimed to
make MPD easily portable, but was never actually made portable.
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Replaced myFgets() with fgets() + g_strchomp().
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Remove duplicated code from MPD.
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GLib's g_path_get_basename() is much more reliable than
mpd_basename(). The latter could be tricked into an assertion
failure.
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Don't use db_get_directory() and traverse the full path with every
directory being loaded. Just see if the current parent contains the
entry. Everything else would be invalid anyway..
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A manipulated database could trigger an assertion failure, because the
parent didn't match. Do a proper check if the new directory is within
the parent's. This uses FATAL() to bail out, so MPD still dies, but
it doesn't crash.
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No idea why it was created in directory.h, but it should be in
dirvec.h.
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Remove clutter from directory.c. Everything which saves or loads
to/from the hard disk goes to directory_save.c, and code which sends
directory information to the client is moved into directory_print.c.
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For the root directory, let's set path to an empty string. This saves
a few checks.
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CamelCase is ugly, rename the functions.
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Yet another CamelCase removal patch.
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Taming the directory.c monster, part II: move the database management
stuff to database. directory.c should only contain code which works
on directory objects.
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The function isRootDirectory() is tiny and can be converted to an
inline function. Don't allow name==NULL.
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CamelCase is ugly... rename all functions.
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Again, a data type which can be forward-declared.
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The struct can be forward-declared by other headers, which relaxes the
header dependencies.
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exploreDirectory() duplicates some code in updateDirectory(). Merge
both functions, and use directory_is_empty() to determine whether
update or explore mode should be used.
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directory_is_empty() is a tiny inline function which determine if a
directory has any child objects (sub directories or songs).
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The source directory.c mixes several libraries: directory object
management, database management and database update, resulting in a
1000+ line monster. Move the whole database update code to update.c.
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oops :x
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This makes the update code thread-safe and doesn't penalize
the playlist code by complicating it with complicated and
error-prone locks (and the associated overhead, not everybody
has a thread-implementation as good as NPTL).
The update task blocks during the delete; but the update task is
a slow task anyways so we can block w/o people caring too much.
This was also our only freeSong call site, so remove that
function.
Note that deleting entire directories is not fully thread-safe,
yet; as their traversals are not yet locked.
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Get rid of songvec_write so we can enforce proper locking
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Being consistent with most UNIX functions...
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song objects cannot exist without a path or URL
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We already know if a song is a URL or not based on whether it
has parentDir defined or not. Hopefully one day in the future
we can drop HTTP support from MPD entirely when an HTTP
filesystem comes along and we can access streams via open(2).
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Reduce the number of allocations we make, so there's less
pressure on the allocator and less overhead to keep track
of the allocations in.
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Instead of allocating a new one, just reuse an existing
one if one is found when rereading the DB. This is a small
makes the previous commit work on subdirectories
of the root music directory.
[1] "song: better handling of existing songs when rereading DB"
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Now the "update" command can be issued multiple times regardless
of whether the client is in list mode or not.
We serialize the update tasks to prevent updates from trampling
over each other and will spawn another update task
once the current one is finished updating and reaped.
Right now we cap the queue size to 32 which is probably enough (I
bet most people usually run update with no argument anyways);
but we can make it grow/shrink dynamically if needed. There'll
still be a hard-coded limit to prevent DoS attacks, though.
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Instead of relying on the shortname, just pass the song pointer
to prevent redundant lookups during deletes.
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Improving the signal to noise ratio...
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If a write failed, it's a good sign subsequent writes will fail,
too, so propgate errors all the way up the stack.
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