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dependencies.
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init_archive_deb_data()
We want to filter for data.tar.* in the AR file not the TAR
file, else we get nothing.
all_control_list()
Make the 'extensions' array of control file names a global so it
can be used in unpack_package as well. Name the global
all_control_files. Don't hard code the length of
all_control_files but instead used sizeof.
unpack_package()
Only unpack the control files we are interested in (from
all_control_files). Extract the data.tar.gz into / rather than
the current directory.
dpkg_main()
Configure packages in a second pass so all the packages being
installed are unpacked before configuring.
Some purely cosmetic changes:
header
update list of differences since two of them are no longer true.
The .control file is no longer stored as a result of this patch
-- it was redundant since the info is in status. New packages
appear to be added to the end of the status file now rather than
the start.
remove_package()
Make message printing optional, so we can avoid a redundant
message when replacing/upgrading a package. When we do print
stuff then include the version number.
purge_package()
Print "Purging xxx (yyy) ..." message like the other actions.
configure_package()
Add "..." to "Setting up" message to be consistent with other
actions.
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archive_xread can be replaced with bb_full_read, and archive_copy_file
with bb_copyfd*
bb_copyfd is split into two functions bb_copyfd_size and bb_copyfd_eof,
they share a common backend.
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tar file.
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prevent overwritting existing files
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open_transformer(), common code for pipe+fork.
Function pointer for read() no longer needed.
Allow inflate to be initialised with a specified buffer size to avoid
over-reading.
Reset static variables in inflate_get_next_window to fix a bug where
only the first file in a .zip would be be extracted.
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files to compute incorrect crc and length for gzip
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Hi Glenn.
I analysed BSS size gzip applet and found may be mistake:
updcrc() checking if (crc_table_empty) but not resetted this var.
This do make slow gzip applet ;-)
--w
vodz
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support compile. Glenn, you may want to verify this.
-Erik
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Use the old fork() method of tar compression support, rather than
read_bz2....
- (*uncompress)(int in, int out) seems like a more natural interface
for compression code.
- it might improve performance by seperating the work into one cpu
bound and one io bound process.
- There is extra code required to do read_[gz|bunzip] since (*uncompress)(int in,
int out) will normally be used by the standalone compression applet.
There have been problems with this method so if you see a "Short read"
error let me know.
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by Arthur Othieno
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new code returns 0 for success.
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This hides a bug related to the new bunzip code in the tar and dpkg[-deb]
applets.
It will also reduce compile time a little as some unused files wont be
compiled.
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additional changes (primarily lots of comments) from Rob Landley.
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the busybox menuconfig triggered my "inacceptable number of spelling mistakes"
upper level, so I decided to make a patch ;-)
I also improved some wording to describe some things in a better way.
Many thanks for an incredible piece of software!
Andreas Mohr, random OSS developer
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Hello Rob,
Here's a patch to your bunzip-3.c file. Nice work btw.
One minor bug fix... checking for error return when read()ing.
Some size/performance optimizations as well. One instance of
memset() seems unnecssary. You might want to take a look.
Anyway, on my machine, decompressing linux-2.6.0-test7.tar.bz2
to /dev/null gave the following times:
bunzip-3.c bzcat (system) bunzip-3.c (patched)
real 0m24.420s 0m22.725s 0m20.701s
user 0m23.930s 0m22.170s 0m20.180s
sys 0m0.070s 0m0.080s 0m0.140s
Size of the patched version is comparable (slightly larger or
smaller depending on compiler flags).
Manuel
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The API for using partial writes, as described in my last message, sucked.
So here's a patch against my last patch that changes things so that
write_bunzip_data calls read_bunzip_data itself behind the scenes whenever
necessary. So usage is now just start_bunzip(), write_bunzip_data() until it
returns a negative number, and then the cleanup at the end of
uncompressStream.
It adds 32 bytes to the executable, but it should allow the caller (tar) to be
simplified enough to compensate. Total -Os stripped exe size now 6856 bytes.
Rob
P.S. I attached the whole C file so you don't have to keep incremental
patches straight if you don't want to. :)
P.S. In the version I'm banging on now, I've simplified the license to just
LGPL. I read the OSL a bit more closely and the patent termination clause
would have bit IBM in their counter-suit of SCO if the code in question had
been OSL instead of GPL, and I've decided I just don't want to beta-test
legal code right now.
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Need to chdir after the tar file is opened, so make common tar filename
parsing and send the file descriptor rather than filename to
writeTarFile.
Modify the verboseFlag operation to determine wether to display on
stderr or stdout at display time, simpler than doing it in tar_main.
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modes, fixes a bug extracting hardlinks to symlinks.
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The tar -x command in busybox does not restore the file mode correctly.
The reason is most probably this code in
archival/libunarachive/data_extract_all.c:
chmod(file_header->name, file_header->mode);
chown(file_header->name, file_header->uid, file_header->gid);
chown clears the set*id bits (on current versions of linux :). Flipping
the order around fixes the problem.
(tested with 1.00pre3 from cvs).
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directory.
From http://www.gnu.org/manual/tar/html_node/tar_123.html
REGTYPE
AREGTYPE
These flags represent a regular file. In order to be compatible with
older versions of tar, a typeflag value of AREGTYPE should be silently
recognized as a regular file. New archives should be created using
REGTYPE. Also, for backward compatibility, tar treats a regular file
whose name ends with a slash as a directory.
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Always preserve creation date
Disable the -p option its for modification date
Remove some cpio header debugging noise
Syncronise file listing behaviour with upstream.
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If we read the contents of compressed files within the ar archive,
e.g. control.tar.gz, then file position gets all out of whack, so
it has to be reset before reading thenext header.
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