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GNU GENERAL PUBLIC LICENSE
|
||||||
|
Version 2, June 1991
|
||||||
|
|
||||||
|
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
|
||||||
|
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
Everyone is permitted to copy and distribute verbatim copies
|
||||||
|
of this license document, but changing it is not allowed.
|
||||||
|
|
||||||
|
Preamble
|
||||||
|
|
||||||
|
The licenses for most software are designed to take away your
|
||||||
|
freedom to share and change it. By contrast, the GNU General Public
|
||||||
|
License is intended to guarantee your freedom to share and change free
|
||||||
|
software--to make sure the software is free for all its users. This
|
||||||
|
General Public License applies to most of the Free Software
|
||||||
|
Foundation's software and to any other program whose authors commit to
|
||||||
|
using it. (Some other Free Software Foundation software is covered by
|
||||||
|
the GNU Library General Public License instead.) You can apply it to
|
||||||
|
your programs, too.
|
||||||
|
|
||||||
|
When we speak of free software, we are referring to freedom, not
|
||||||
|
price. Our General Public Licenses are designed to make sure that you
|
||||||
|
have the freedom to distribute copies of free software (and charge for
|
||||||
|
this service if you wish), that you receive source code or can get it
|
||||||
|
if you want it, that you can change the software or use pieces of it
|
||||||
|
in new free programs; and that you know you can do these things.
|
||||||
|
|
||||||
|
To protect your rights, we need to make restrictions that forbid
|
||||||
|
anyone to deny you these rights or to ask you to surrender the rights.
|
||||||
|
These restrictions translate to certain responsibilities for you if you
|
||||||
|
distribute copies of the software, or if you modify it.
|
||||||
|
|
||||||
|
For example, if you distribute copies of such a program, whether
|
||||||
|
gratis or for a fee, you must give the recipients all the rights that
|
||||||
|
you have. You must make sure that they, too, receive or can get the
|
||||||
|
source code. And you must show them these terms so they know their
|
||||||
|
rights.
|
||||||
|
|
||||||
|
We protect your rights with two steps: (1) copyright the software, and
|
||||||
|
(2) offer you this license which gives you legal permission to copy,
|
||||||
|
distribute and/or modify the software.
|
||||||
|
|
||||||
|
Also, for each author's protection and ours, we want to make certain
|
||||||
|
that everyone understands that there is no warranty for this free
|
||||||
|
software. If the software is modified by someone else and passed on, we
|
||||||
|
want its recipients to know that what they have is not the original, so
|
||||||
|
that any problems introduced by others will not reflect on the original
|
||||||
|
authors' reputations.
|
||||||
|
|
||||||
|
Finally, any free program is threatened constantly by software
|
||||||
|
patents. We wish to avoid the danger that redistributors of a free
|
||||||
|
program will individually obtain patent licenses, in effect making the
|
||||||
|
program proprietary. To prevent this, we have made it clear that any
|
||||||
|
patent must be licensed for everyone's free use or not licensed at all.
|
||||||
|
|
||||||
|
The precise terms and conditions for copying, distribution and
|
||||||
|
modification follow.
|
||||||
|
|
||||||
|
GNU GENERAL PUBLIC LICENSE
|
||||||
|
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
|
||||||
|
|
||||||
|
0. This License applies to any program or other work which contains
|
||||||
|
a notice placed by the copyright holder saying it may be distributed
|
||||||
|
under the terms of this General Public License. The "Program", below,
|
||||||
|
refers to any such program or work, and a "work based on the Program"
|
||||||
|
means either the Program or any derivative work under copyright law:
|
||||||
|
that is to say, a work containing the Program or a portion of it,
|
||||||
|
either verbatim or with modifications and/or translated into another
|
||||||
|
language. (Hereinafter, translation is included without limitation in
|
||||||
|
the term "modification".) Each licensee is addressed as "you".
|
||||||
|
|
||||||
|
Activities other than copying, distribution and modification are not
|
||||||
|
covered by this License; they are outside its scope. The act of
|
||||||
|
running the Program is not restricted, and the output from the Program
|
||||||
|
is covered only if its contents constitute a work based on the
|
||||||
|
Program (independent of having been made by running the Program).
|
||||||
|
Whether that is true depends on what the Program does.
|
||||||
|
|
||||||
|
1. You may copy and distribute verbatim copies of the Program's
|
||||||
|
source code as you receive it, in any medium, provided that you
|
||||||
|
conspicuously and appropriately publish on each copy an appropriate
|
||||||
|
copyright notice and disclaimer of warranty; keep intact all the
|
||||||
|
notices that refer to this License and to the absence of any warranty;
|
||||||
|
and give any other recipients of the Program a copy of this License
|
||||||
|
along with the Program.
|
||||||
|
|
||||||
|
You may charge a fee for the physical act of transferring a copy, and
|
||||||
|
you may at your option offer warranty protection in exchange for a fee.
|
||||||
|
|
||||||
|
2. You may modify your copy or copies of the Program or any portion
|
||||||
|
of it, thus forming a work based on the Program, and copy and
|
||||||
|
distribute such modifications or work under the terms of Section 1
|
||||||
|
above, provided that you also meet all of these conditions:
|
||||||
|
|
||||||
|
a) You must cause the modified files to carry prominent notices
|
||||||
|
stating that you changed the files and the date of any change.
|
||||||
|
|
||||||
|
b) You must cause any work that you distribute or publish, that in
|
||||||
|
whole or in part contains or is derived from the Program or any
|
||||||
|
part thereof, to be licensed as a whole at no charge to all third
|
||||||
|
parties under the terms of this License.
|
||||||
|
|
||||||
|
c) If the modified program normally reads commands interactively
|
||||||
|
when run, you must cause it, when started running for such
|
||||||
|
interactive use in the most ordinary way, to print or display an
|
||||||
|
announcement including an appropriate copyright notice and a
|
||||||
|
notice that there is no warranty (or else, saying that you provide
|
||||||
|
a warranty) and that users may redistribute the program under
|
||||||
|
these conditions, and telling the user how to view a copy of this
|
||||||
|
License. (Exception: if the Program itself is interactive but
|
||||||
|
does not normally print such an announcement, your work based on
|
||||||
|
the Program is not required to print an announcement.)
|
||||||
|
|
||||||
|
These requirements apply to the modified work as a whole. If
|
||||||
|
identifiable sections of that work are not derived from the Program,
|
||||||
|
and can be reasonably considered independent and separate works in
|
||||||
|
themselves, then this License, and its terms, do not apply to those
|
||||||
|
sections when you distribute them as separate works. But when you
|
||||||
|
distribute the same sections as part of a whole which is a work based
|
||||||
|
on the Program, the distribution of the whole must be on the terms of
|
||||||
|
this License, whose permissions for other licensees extend to the
|
||||||
|
entire whole, and thus to each and every part regardless of who wrote it.
|
||||||
|
|
||||||
|
Thus, it is not the intent of this section to claim rights or contest
|
||||||
|
your rights to work written entirely by you; rather, the intent is to
|
||||||
|
exercise the right to control the distribution of derivative or
|
||||||
|
collective works based on the Program.
|
||||||
|
|
||||||
|
In addition, mere aggregation of another work not based on the Program
|
||||||
|
with the Program (or with a work based on the Program) on a volume of
|
||||||
|
a storage or distribution medium does not bring the other work under
|
||||||
|
the scope of this License.
|
||||||
|
|
||||||
|
3. You may copy and distribute the Program (or a work based on it,
|
||||||
|
under Section 2) in object code or executable form under the terms of
|
||||||
|
Sections 1 and 2 above provided that you also do one of the following:
|
||||||
|
|
||||||
|
a) Accompany it with the complete corresponding machine-readable
|
||||||
|
source code, which must be distributed under the terms of Sections
|
||||||
|
1 and 2 above on a medium customarily used for software interchange; or,
|
||||||
|
|
||||||
|
b) Accompany it with a written offer, valid for at least three
|
||||||
|
years, to give any third party, for a charge no more than your
|
||||||
|
cost of physically performing source distribution, a complete
|
||||||
|
machine-readable copy of the corresponding source code, to be
|
||||||
|
distributed under the terms of Sections 1 and 2 above on a medium
|
||||||
|
customarily used for software interchange; or,
|
||||||
|
|
||||||
|
c) Accompany it with the information you received as to the offer
|
||||||
|
to distribute corresponding source code. (This alternative is
|
||||||
|
allowed only for noncommercial distribution and only if you
|
||||||
|
received the program in object code or executable form with such
|
||||||
|
an offer, in accord with Subsection b above.)
|
||||||
|
|
||||||
|
The source code for a work means the preferred form of the work for
|
||||||
|
making modifications to it. For an executable work, complete source
|
||||||
|
code means all the source code for all modules it contains, plus any
|
||||||
|
associated interface definition files, plus the scripts used to
|
||||||
|
control compilation and installation of the executable. However, as a
|
||||||
|
special exception, the source code distributed need not include
|
||||||
|
anything that is normally distributed (in either source or binary
|
||||||
|
form) with the major components (compiler, kernel, and so on) of the
|
||||||
|
operating system on which the executable runs, unless that component
|
||||||
|
itself accompanies the executable.
|
||||||
|
|
||||||
|
If distribution of executable or object code is made by offering
|
||||||
|
access to copy from a designated place, then offering equivalent
|
||||||
|
access to copy the source code from the same place counts as
|
||||||
|
distribution of the source code, even though third parties are not
|
||||||
|
compelled to copy the source along with the object code.
|
||||||
|
|
||||||
|
4. You may not copy, modify, sublicense, or distribute the Program
|
||||||
|
except as expressly provided under this License. Any attempt
|
||||||
|
otherwise to copy, modify, sublicense or distribute the Program is
|
||||||
|
void, and will automatically terminate your rights under this License.
|
||||||
|
However, parties who have received copies, or rights, from you under
|
||||||
|
this License will not have their licenses terminated so long as such
|
||||||
|
parties remain in full compliance.
|
||||||
|
|
||||||
|
5. You are not required to accept this License, since you have not
|
||||||
|
signed it. However, nothing else grants you permission to modify or
|
||||||
|
distribute the Program or its derivative works. These actions are
|
||||||
|
prohibited by law if you do not accept this License. Therefore, by
|
||||||
|
modifying or distributing the Program (or any work based on the
|
||||||
|
Program), you indicate your acceptance of this License to do so, and
|
||||||
|
all its terms and conditions for copying, distributing or modifying
|
||||||
|
the Program or works based on it.
|
||||||
|
|
||||||
|
6. Each time you redistribute the Program (or any work based on the
|
||||||
|
Program), the recipient automatically receives a license from the
|
||||||
|
original licensor to copy, distribute or modify the Program subject to
|
||||||
|
these terms and conditions. You may not impose any further
|
||||||
|
restrictions on the recipients' exercise of the rights granted herein.
|
||||||
|
You are not responsible for enforcing compliance by third parties to
|
||||||
|
this License.
|
||||||
|
|
||||||
|
7. If, as a consequence of a court judgment or allegation of patent
|
||||||
|
infringement or for any other reason (not limited to patent issues),
|
||||||
|
conditions are imposed on you (whether by court order, agreement or
|
||||||
|
otherwise) that contradict the conditions of this License, they do not
|
||||||
|
excuse you from the conditions of this License. If you cannot
|
||||||
|
distribute so as to satisfy simultaneously your obligations under this
|
||||||
|
License and any other pertinent obligations, then as a consequence you
|
||||||
|
may not distribute the Program at all. For example, if a patent
|
||||||
|
license would not permit royalty-free redistribution of the Program by
|
||||||
|
all those who receive copies directly or indirectly through you, then
|
||||||
|
the only way you could satisfy both it and this License would be to
|
||||||
|
refrain entirely from distribution of the Program.
|
||||||
|
|
||||||
|
If any portion of this section is held invalid or unenforceable under
|
||||||
|
any particular circumstance, the balance of the section is intended to
|
||||||
|
apply and the section as a whole is intended to apply in other
|
||||||
|
circumstances.
|
||||||
|
|
||||||
|
It is not the purpose of this section to induce you to infringe any
|
||||||
|
patents or other property right claims or to contest validity of any
|
||||||
|
such claims; this section has the sole purpose of protecting the
|
||||||
|
integrity of the free software distribution system, which is
|
||||||
|
implemented by public license practices. Many people have made
|
||||||
|
generous contributions to the wide range of software distributed
|
||||||
|
through that system in reliance on consistent application of that
|
||||||
|
system; it is up to the author/donor to decide if he or she is willing
|
||||||
|
to distribute software through any other system and a licensee cannot
|
||||||
|
impose that choice.
|
||||||
|
|
||||||
|
This section is intended to make thoroughly clear what is believed to
|
||||||
|
be a consequence of the rest of this License.
|
||||||
|
|
||||||
|
8. If the distribution and/or use of the Program is restricted in
|
||||||
|
certain countries either by patents or by copyrighted interfaces, the
|
||||||
|
original copyright holder who places the Program under this License
|
||||||
|
may add an explicit geographical distribution limitation excluding
|
||||||
|
those countries, so that distribution is permitted only in or among
|
||||||
|
countries not thus excluded. In such case, this License incorporates
|
||||||
|
the limitation as if written in the body of this License.
|
||||||
|
|
||||||
|
9. The Free Software Foundation may publish revised and/or new versions
|
||||||
|
of the General Public License from time to time. Such new versions will
|
||||||
|
be similar in spirit to the present version, but may differ in detail to
|
||||||
|
address new problems or concerns.
|
||||||
|
|
||||||
|
Each version is given a distinguishing version number. If the Program
|
||||||
|
specifies a version number of this License which applies to it and "any
|
||||||
|
later version", you have the option of following the terms and conditions
|
||||||
|
either of that version or of any later version published by the Free
|
||||||
|
Software Foundation. If the Program does not specify a version number of
|
||||||
|
this License, you may choose any version ever published by the Free Software
|
||||||
|
Foundation.
|
||||||
|
|
||||||
|
10. If you wish to incorporate parts of the Program into other free
|
||||||
|
programs whose distribution conditions are different, write to the author
|
||||||
|
to ask for permission. For software which is copyrighted by the Free
|
||||||
|
Software Foundation, write to the Free Software Foundation; we sometimes
|
||||||
|
make exceptions for this. Our decision will be guided by the two goals
|
||||||
|
of preserving the free status of all derivatives of our free software and
|
||||||
|
of promoting the sharing and reuse of software generally.
|
||||||
|
|
||||||
|
NO WARRANTY
|
||||||
|
|
||||||
|
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
|
||||||
|
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
|
||||||
|
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
|
||||||
|
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
|
||||||
|
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||||
|
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
|
||||||
|
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
|
||||||
|
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
|
||||||
|
REPAIR OR CORRECTION.
|
||||||
|
|
||||||
|
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||||
|
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
|
||||||
|
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
|
||||||
|
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
|
||||||
|
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
|
||||||
|
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
|
||||||
|
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
|
||||||
|
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
|
||||||
|
POSSIBILITY OF SUCH DAMAGES.
|
||||||
|
|
||||||
|
END OF TERMS AND CONDITIONS
|
||||||
|
|
||||||
|
How to Apply These Terms to Your New Programs
|
||||||
|
|
||||||
|
If you develop a new program, and you want it to be of the greatest
|
||||||
|
possible use to the public, the best way to achieve this is to make it
|
||||||
|
free software which everyone can redistribute and change under these terms.
|
||||||
|
|
||||||
|
To do so, attach the following notices to the program. It is safest
|
||||||
|
to attach them to the start of each source file to most effectively
|
||||||
|
convey the exclusion of warranty; and each file should have at least
|
||||||
|
the "copyright" line and a pointer to where the full notice is found.
|
||||||
|
|
||||||
|
<one line to give the program's name and a brief idea of what it does.>
|
||||||
|
Copyright (C) <year> <name of author>
|
||||||
|
|
||||||
|
This program is free software; you can redistribute it and/or modify
|
||||||
|
it under the terms of the GNU General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 of the License, or
|
||||||
|
(at your option) any later version.
|
||||||
|
|
||||||
|
This program is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
GNU General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with this program; if not, write to the Free Software
|
||||||
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
|
||||||
|
|
||||||
|
Also add information on how to contact you by electronic and paper mail.
|
||||||
|
|
||||||
|
If the program is interactive, make it output a short notice like this
|
||||||
|
when it starts in an interactive mode:
|
||||||
|
|
||||||
|
Gnomovision version 69, Copyright (C) year name of author
|
||||||
|
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||||
|
This is free software, and you are welcome to redistribute it
|
||||||
|
under certain conditions; type `show c' for details.
|
||||||
|
|
||||||
|
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||||
|
parts of the General Public License. Of course, the commands you use may
|
||||||
|
be called something other than `show w' and `show c'; they could even be
|
||||||
|
mouse-clicks or menu items--whatever suits your program.
|
||||||
|
|
||||||
|
You should also get your employer (if you work as a programmer) or your
|
||||||
|
school, if any, to sign a "copyright disclaimer" for the program, if
|
||||||
|
necessary. Here is a sample; alter the names:
|
||||||
|
|
||||||
|
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
||||||
|
`Gnomovision' (which makes passes at compilers) written by James Hacker.
|
||||||
|
|
||||||
|
<signature of Ty Coon>, 1 April 1989
|
||||||
|
Ty Coon, President of Vice
|
||||||
|
|
||||||
|
This General Public License does not permit incorporating your program into
|
||||||
|
proprietary programs. If your program is a subroutine library, you may
|
||||||
|
consider it more useful to permit linking proprietary applications with the
|
||||||
|
library. If this is what you want to do, use the GNU Library General
|
||||||
|
Public License instead of this License.
|
||||||
|
|
||||||
|
----------------------------------------------------------------------
|
||||||
|
|
||||||
|
GNU LIBRARY GENERAL PUBLIC LICENSE
|
||||||
|
Version 2, June 1991
|
||||||
|
|
||||||
|
Copyright (C) 1991 Free Software Foundation, Inc.
|
||||||
|
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
Everyone is permitted to copy and distribute verbatim copies
|
||||||
|
of this license document, but changing it is not allowed.
|
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||||||
|
the only way you could satisfy both it and this License would be to
|
||||||
|
refrain entirely from distribution of the Library.
|
||||||
|
|
||||||
|
If any portion of this section is held invalid or unenforceable under any
|
||||||
|
particular circumstance, the balance of the section is intended to apply,
|
||||||
|
and the section as a whole is intended to apply in other circumstances.
|
||||||
|
|
||||||
|
It is not the purpose of this section to induce you to infringe any
|
||||||
|
patents or other property right claims or to contest validity of any
|
||||||
|
such claims; this section has the sole purpose of protecting the
|
||||||
|
integrity of the free software distribution system which is
|
||||||
|
implemented by public license practices. Many people have made
|
||||||
|
generous contributions to the wide range of software distributed
|
||||||
|
through that system in reliance on consistent application of that
|
||||||
|
system; it is up to the author/donor to decide if he or she is willing
|
||||||
|
to distribute software through any other system and a licensee cannot
|
||||||
|
impose that choice.
|
||||||
|
|
||||||
|
This section is intended to make thoroughly clear what is believed to
|
||||||
|
be a consequence of the rest of this License.
|
||||||
|
|
||||||
|
12. If the distribution and/or use of the Library is restricted in
|
||||||
|
certain countries either by patents or by copyrighted interfaces, the
|
||||||
|
original copyright holder who places the Library under this License may add
|
||||||
|
an explicit geographical distribution limitation excluding those countries,
|
||||||
|
so that distribution is permitted only in or among countries not thus
|
||||||
|
excluded. In such case, this License incorporates the limitation as if
|
||||||
|
written in the body of this License.
|
||||||
|
|
||||||
|
13. The Free Software Foundation may publish revised and/or new
|
||||||
|
versions of the Library General Public License from time to time.
|
||||||
|
Such new versions will be similar in spirit to the present version,
|
||||||
|
but may differ in detail to address new problems or concerns.
|
||||||
|
|
||||||
|
Each version is given a distinguishing version number. If the Library
|
||||||
|
specifies a version number of this License which applies to it and
|
||||||
|
"any later version", you have the option of following the terms and
|
||||||
|
conditions either of that version or of any later version published by
|
||||||
|
the Free Software Foundation. If the Library does not specify a
|
||||||
|
license version number, you may choose any version ever published by
|
||||||
|
the Free Software Foundation.
|
||||||
|
|
||||||
|
14. If you wish to incorporate parts of the Library into other free
|
||||||
|
programs whose distribution conditions are incompatible with these,
|
||||||
|
write to the author to ask for permission. For software which is
|
||||||
|
copyrighted by the Free Software Foundation, write to the Free
|
||||||
|
Software Foundation; we sometimes make exceptions for this. Our
|
||||||
|
decision will be guided by the two goals of preserving the free status
|
||||||
|
of all derivatives of our free software and of promoting the sharing
|
||||||
|
and reuse of software generally.
|
||||||
|
|
||||||
|
NO WARRANTY
|
||||||
|
|
||||||
|
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
||||||
|
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
||||||
|
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
||||||
|
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
|
||||||
|
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||||
|
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
||||||
|
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
|
||||||
|
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||||
|
|
||||||
|
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
||||||
|
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
||||||
|
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
||||||
|
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
|
||||||
|
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
|
||||||
|
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
|
||||||
|
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
||||||
|
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
||||||
|
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||||
|
DAMAGES.
|
||||||
|
|
||||||
|
END OF TERMS AND CONDITIONS
|
||||||
|
|
||||||
|
How to Apply These Terms to Your New Libraries
|
||||||
|
|
||||||
|
If you develop a new library, and you want it to be of the greatest
|
||||||
|
possible use to the public, we recommend making it free software that
|
||||||
|
everyone can redistribute and change. You can do so by permitting
|
||||||
|
redistribution under these terms (or, alternatively, under the terms of the
|
||||||
|
ordinary General Public License).
|
||||||
|
|
||||||
|
To apply these terms, attach the following notices to the library. It is
|
||||||
|
safest to attach them to the start of each source file to most effectively
|
||||||
|
convey the exclusion of warranty; and each file should have at least the
|
||||||
|
"copyright" line and a pointer to where the full notice is found.
|
||||||
|
|
||||||
|
<one line to give the library's name and a brief idea of what it does.>
|
||||||
|
Copyright (C) <year> <name of author>
|
||||||
|
|
||||||
|
This library is free software; you can redistribute it and/or
|
||||||
|
modify it under the terms of the GNU Library General Public
|
||||||
|
License as published by the Free Software Foundation; either
|
||||||
|
version 2 of the License, or (at your option) any later version.
|
||||||
|
|
||||||
|
This library is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
Library General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU Library General Public
|
||||||
|
License along with this library; if not, write to the Free Software
|
||||||
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
|
||||||
|
Also add information on how to contact you by electronic and paper mail.
|
||||||
|
|
||||||
|
You should also get your employer (if you work as a programmer) or your
|
||||||
|
school, if any, to sign a "copyright disclaimer" for the library, if
|
||||||
|
necessary. Here is a sample; alter the names:
|
||||||
|
|
||||||
|
Yoyodyne, Inc., hereby disclaims all copyright interest in the
|
||||||
|
library `Frob' (a library for tweaking knobs) written by James Random Hacker.
|
||||||
|
|
||||||
|
<signature of Ty Coon>, 1 April 1990
|
||||||
|
Ty Coon, President of Vice
|
||||||
|
|
||||||
|
That's all there is to it!
|
|
@ -0,0 +1,84 @@
|
||||||
|
# Makefile
|
||||||
|
|
||||||
|
### Compatibility checks
|
||||||
|
|
||||||
|
LIBEXT2FS_INCLUDE_ROOT := /usr/include/ext2fs
|
||||||
|
|
||||||
|
test_file := $(LIBEXT2FS_INCLUDE_ROOT)/ext2fs.h
|
||||||
|
test_result := $(shell grep ext2fs_dirent_name_len $(test_file) | wc -l)
|
||||||
|
ifneq ($(test_result),0)
|
||||||
|
LIBEXT2_CFLAGS += -DHAVE_EXT2FS_DIRENT_NAME_LEN
|
||||||
|
endif
|
||||||
|
|
||||||
|
test_file := $(LIBEXT2FS_INCLUDE_ROOT)/ext2_io.h
|
||||||
|
test_result := $(shell grep cache_readahead $(test_file) | wc -l)
|
||||||
|
ifneq ($(test_result),0)
|
||||||
|
LIBEXT2_CFLAGS += -DHAVE_EXT2FS_CACHE_READAHEAD
|
||||||
|
endif
|
||||||
|
|
||||||
|
test_file := $(LIBEXT2FS_INCLUDE_ROOT)/ext2_io.h
|
||||||
|
test_result := $(shell grep zeroout $(test_file) | wc -l)
|
||||||
|
ifneq ($(test_result),0)
|
||||||
|
LIBEXT2_CFLAGS += -DHAVE_EXT2FS_ZEROOUT
|
||||||
|
endif
|
||||||
|
|
||||||
|
### Tools and flags
|
||||||
|
|
||||||
|
CC := gcc
|
||||||
|
CFLAGS := -g -Wall $(LIBEXT2_CFLAGS)
|
||||||
|
|
||||||
|
CXX := g++
|
||||||
|
CXXFLAGS := $(CFLAGS)
|
||||||
|
|
||||||
|
LD := g++
|
||||||
|
LDFLAGS := -g
|
||||||
|
|
||||||
|
STATIC_LIBS :=
|
||||||
|
SHARED_LIBS := -lfuse -lext2fs -lz
|
||||||
|
|
||||||
|
DESTDIR ?= /usr/local
|
||||||
|
BINDIR ?= $(DESTDIR)/bin
|
||||||
|
|
||||||
|
### Rules
|
||||||
|
|
||||||
|
MODULE := gzextfs
|
||||||
|
|
||||||
|
SRC_FILES := \
|
||||||
|
gzextio.cxx \
|
||||||
|
gzextfs.cxx
|
||||||
|
|
||||||
|
all: $(MODULE)
|
||||||
|
.PHONY: all
|
||||||
|
|
||||||
|
obj_dir := .obj
|
||||||
|
|
||||||
|
c_sources := $(filter %.c,$(SRC_FILES))
|
||||||
|
c_objects := $(addprefix $(obj_dir)/,$(c_sources:.c=.o))
|
||||||
|
|
||||||
|
cxx_sources := $(filter %.cxx,$(SRC_FILES))
|
||||||
|
cxx_objects := $(addprefix $(obj_dir)/,$(cxx_sources:.cxx=.o))
|
||||||
|
|
||||||
|
module_objects := $(c_objects) $(cxx_objects)
|
||||||
|
|
||||||
|
ifeq (,$(filter clean,$(MAKECMDGOALS)))
|
||||||
|
-include $(obj_dir)/*.d
|
||||||
|
endif
|
||||||
|
|
||||||
|
$(MODULE): $(module_objects)
|
||||||
|
$(LD) $(LDFLAGS) -o $@ $^ $(STATIC_LIBS) $(SHARED_LIBS)
|
||||||
|
|
||||||
|
$(obj_dir)/%.o: %.c
|
||||||
|
@mkdir -p $(@D)
|
||||||
|
$(CC) $(CFLAGS) -MD -MP -MF $(@D)/$(@F:.o=.d) -c -o $@ $<
|
||||||
|
|
||||||
|
$(obj_dir)/%.o: %.cxx
|
||||||
|
@mkdir -p $(@D)
|
||||||
|
$(CXX) $(CXXFLAGS) -MD -MP -MF $(@D)/$(@F:.o=.d) -c -o $@ $<
|
||||||
|
|
||||||
|
.PHONY: clean
|
||||||
|
clean:
|
||||||
|
rm -rf $(obj_dir) $(MODULE)
|
||||||
|
|
||||||
|
.PHONY: install
|
||||||
|
install: $(MODULE)
|
||||||
|
install -m 0755 $(MODULE) $(BINDIR)
|
|
@ -0,0 +1,18 @@
|
||||||
|
This is the gzextfs package. It is a FUSE filesystem implementation
|
||||||
|
which is able to mount a gzip compressed ext2/3/4 image.
|
||||||
|
|
||||||
|
Installation instructions:
|
||||||
|
|
||||||
|
make
|
||||||
|
make install
|
||||||
|
|
||||||
|
Usage instructions:
|
||||||
|
|
||||||
|
gzextfs --filename=image.gz /mnt
|
||||||
|
|
||||||
|
The official source code repository for gzextfs can be found at:
|
||||||
|
|
||||||
|
https://github.com/tdm/gzextfs
|
||||||
|
|
||||||
|
Copyright (C) Tom Marshall <tdm.code@gmail.com>
|
||||||
|
Licensed under the GNU Public License version 2.
|
|
@ -0,0 +1,8 @@
|
||||||
|
#ifndef GZEXTDEF_H
|
||||||
|
#define GZEXTDEF_H
|
||||||
|
|
||||||
|
#define _FILE_OFFSET_BITS 64
|
||||||
|
|
||||||
|
#define FUSE_USE_VERSION 26
|
||||||
|
|
||||||
|
#endif
|
|
@ -0,0 +1,521 @@
|
||||||
|
/* gsextfs.cxx */
|
||||||
|
|
||||||
|
#include "gzextdef.h"
|
||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <limits.h>
|
||||||
|
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <sys/types.h>
|
||||||
|
|
||||||
|
#include <fuse/fuse.h>
|
||||||
|
|
||||||
|
extern "C" {
|
||||||
|
#include <ext2fs/ext2_err.h>
|
||||||
|
#include <ext2fs/ext2fs.h>
|
||||||
|
}
|
||||||
|
#ifndef HAVE_EXT2FS_DIRENT_NAME_LEN
|
||||||
|
static inline int
|
||||||
|
ext2fs_dirent_name_len(const struct ext2_dir_entry *entry)
|
||||||
|
{
|
||||||
|
return entry->name_len & 0xff;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include "gzextio.h"
|
||||||
|
|
||||||
|
#include <string>
|
||||||
|
#include <list>
|
||||||
|
#include <map>
|
||||||
|
|
||||||
|
using namespace std;
|
||||||
|
|
||||||
|
typedef list<string> stringlist;
|
||||||
|
|
||||||
|
typedef map<string, ext2_ino_t> pathcache;
|
||||||
|
typedef map<ext2_ino_t, ext2_inode> inodecache;
|
||||||
|
typedef map<ext2_ino_t, stringlist> dircache;
|
||||||
|
|
||||||
|
struct file_state {
|
||||||
|
pthread_mutex_t lock;
|
||||||
|
};
|
||||||
|
typedef map<ext2_file_t, file_state*> filemap;
|
||||||
|
|
||||||
|
static struct options {
|
||||||
|
const char* filename;
|
||||||
|
int show_help;
|
||||||
|
} options;
|
||||||
|
|
||||||
|
struct gzfs_priv {
|
||||||
|
char* filename;
|
||||||
|
ext2_filsys fs;
|
||||||
|
|
||||||
|
pthread_mutex_t path_lock;
|
||||||
|
pathcache path_cache;
|
||||||
|
pthread_mutex_t inode_lock;
|
||||||
|
inodecache inode_cache;
|
||||||
|
pthread_mutex_t dir_lock;
|
||||||
|
dircache dir_cache;
|
||||||
|
|
||||||
|
pthread_mutex_t file_lock;
|
||||||
|
filemap file_table;
|
||||||
|
};
|
||||||
|
#define GZFS_PRIV(p) ((struct gzfs_priv*)(p->private_data))
|
||||||
|
|
||||||
|
/*** ext2 helpers ***/
|
||||||
|
|
||||||
|
static bool
|
||||||
|
lookup_path(struct gzfs_priv* priv, const char* pathname, ext2_ino_t& inum)
|
||||||
|
{
|
||||||
|
const char* p;
|
||||||
|
const char* q;
|
||||||
|
ext2_ino_t dir;
|
||||||
|
ext2_ino_t subdir;
|
||||||
|
|
||||||
|
if (!*pathname) {
|
||||||
|
inum = EXT2_ROOT_INO;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
pthread_mutex_lock(&priv->path_lock);
|
||||||
|
|
||||||
|
pathcache::iterator itr = priv->path_cache.find(pathname);
|
||||||
|
if (itr != priv->path_cache.end()) {
|
||||||
|
inum = itr->second;
|
||||||
|
pthread_mutex_unlock(&priv->path_lock);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
dir = EXT2_ROOT_INO;
|
||||||
|
|
||||||
|
p = pathname;
|
||||||
|
q = strchr(p, '/');
|
||||||
|
while (q) {
|
||||||
|
if (ext2fs_lookup(priv->fs, dir, p, q - p, NULL, &subdir) != 0) {
|
||||||
|
pthread_mutex_unlock(&priv->path_lock);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
dir = subdir;
|
||||||
|
p = q + 1;
|
||||||
|
q = strchr(p, '/');
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ext2fs_lookup(priv->fs, dir, p, strlen(p), NULL, &inum) != 0) {
|
||||||
|
pthread_mutex_unlock(&priv->path_lock);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
priv->path_cache[pathname] = inum;
|
||||||
|
|
||||||
|
pthread_mutex_unlock(&priv->path_lock);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool
|
||||||
|
lookup_inode(struct gzfs_priv* priv, ext2_ino_t inum, ext2_inode& inode)
|
||||||
|
{
|
||||||
|
pthread_mutex_lock(&priv->inode_lock);
|
||||||
|
|
||||||
|
inodecache::iterator itr = priv->inode_cache.find(inum);
|
||||||
|
if (itr != priv->inode_cache.end()) {
|
||||||
|
inode = itr->second;
|
||||||
|
pthread_mutex_unlock(&priv->inode_lock);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ext2fs_read_inode(priv->fs, inum, &inode) != 0) {
|
||||||
|
pthread_mutex_unlock(&priv->inode_lock);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
priv->inode_cache[inum] = inode;
|
||||||
|
|
||||||
|
pthread_mutex_unlock(&priv->inode_lock);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
dir_iterator(struct ext2_dir_entry* dirent, int offset,
|
||||||
|
int blocksize, char* buf, void* priv)
|
||||||
|
{
|
||||||
|
stringlist* filenames = (stringlist*)priv;
|
||||||
|
|
||||||
|
filenames->push_back(string(dirent->name, ext2fs_dirent_name_len(dirent)));
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool
|
||||||
|
lookup_dir(struct gzfs_priv* priv, ext2_ino_t inum, stringlist& filenames)
|
||||||
|
{
|
||||||
|
pthread_mutex_lock(&priv->dir_lock);
|
||||||
|
|
||||||
|
dircache::iterator itr = priv->dir_cache.find(inum);
|
||||||
|
if (itr != priv->dir_cache.end()) {
|
||||||
|
filenames = itr->second;
|
||||||
|
pthread_mutex_unlock(&priv->dir_lock);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ext2fs_dir_iterate(priv->fs, inum, 0, NULL, dir_iterator, &filenames) != 0) {
|
||||||
|
pthread_mutex_unlock(&priv->dir_lock);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
priv->dir_cache[inum] = filenames;
|
||||||
|
|
||||||
|
pthread_mutex_unlock(&priv->dir_lock);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*** FUSE operations ***/
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_getattr(const char* path, struct stat* st)
|
||||||
|
{
|
||||||
|
struct gzfs_priv* priv = GZFS_PRIV(fuse_get_context());
|
||||||
|
ext2_ino_t inum;
|
||||||
|
struct ext2_inode inode;
|
||||||
|
|
||||||
|
if (*path != '/') {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!lookup_path(priv, path + 1, inum)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!lookup_inode(priv, inum, inode)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
st->st_ino = inum;
|
||||||
|
st->st_mode = inode.i_mode;
|
||||||
|
st->st_nlink = inode.i_links_count;
|
||||||
|
st->st_uid = inode.i_uid;
|
||||||
|
st->st_gid = inode.i_gid;
|
||||||
|
st->st_size = inode.i_size;
|
||||||
|
st->st_blksize = 4096 /* XXX */;
|
||||||
|
st->st_blocks = inode.i_blocks;
|
||||||
|
st->st_atime = inode.i_atime;
|
||||||
|
st->st_mtime = inode.i_mtime;
|
||||||
|
st->st_ctime = inode.i_ctime;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_readlink(const char* path, char* buf, size_t size)
|
||||||
|
{
|
||||||
|
struct gzfs_priv* priv = GZFS_PRIV(fuse_get_context());
|
||||||
|
ext2_ino_t inum;
|
||||||
|
struct ext2_inode inode;
|
||||||
|
|
||||||
|
if (*path != '/') {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!lookup_path(priv, path+1, inum)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!lookup_inode(priv, inum, inode)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* XXX: The below needs tested thoroughly. */
|
||||||
|
char linkbuf[PATH_MAX + 1];
|
||||||
|
size_t linksize;
|
||||||
|
if (ext2fs_inode_has_valid_blocks(&inode)) {
|
||||||
|
ext2_file_t file;
|
||||||
|
unsigned int nread;
|
||||||
|
if (ext2fs_file_open(priv->fs, inum, 0, &file) != 0) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
if (ext2fs_file_read(file, linkbuf, sizeof(linkbuf), &nread) != 0) {
|
||||||
|
ext2fs_file_close(file);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
linksize = nread;
|
||||||
|
ext2fs_file_close(file);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
memcpy(linkbuf, (const char*)inode.i_block, sizeof(inode.i_block));
|
||||||
|
linksize = sizeof(inode.i_block);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (size > linksize) {
|
||||||
|
size = linksize;
|
||||||
|
}
|
||||||
|
memcpy(buf, linkbuf, size);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_open(const char* path, struct fuse_file_info* ffi)
|
||||||
|
{
|
||||||
|
struct gzfs_priv* priv = GZFS_PRIV(fuse_get_context());
|
||||||
|
ext2_ino_t inum;
|
||||||
|
ext2_file_t file;
|
||||||
|
|
||||||
|
if (*path != '/') {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!lookup_path(priv, path + 1, inum)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ext2fs_file_open(priv->fs, inum, 0, &file) != 0) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
file_state* state = new file_state;
|
||||||
|
pthread_mutex_init(&state->lock, NULL);
|
||||||
|
|
||||||
|
pthread_mutex_lock(&priv->file_lock);
|
||||||
|
priv->file_table[file] = state;
|
||||||
|
pthread_mutex_unlock(&priv->file_lock);
|
||||||
|
|
||||||
|
ffi->fh = (uint64_t)file;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_read(const char* path, char* buf, size_t size, off_t off, struct fuse_file_info* ffi)
|
||||||
|
{
|
||||||
|
struct gzfs_priv* priv = GZFS_PRIV(fuse_get_context());
|
||||||
|
__u64 pos;
|
||||||
|
unsigned int nread;
|
||||||
|
ext2_file_t file = (ext2_file_t)ffi->fh;
|
||||||
|
|
||||||
|
pthread_mutex_lock(&priv->file_lock);
|
||||||
|
file_state* state = priv->file_table.find(file)->second;
|
||||||
|
pthread_mutex_unlock(&priv->file_lock);
|
||||||
|
|
||||||
|
pthread_mutex_lock(&state->lock);
|
||||||
|
|
||||||
|
if (ext2fs_file_llseek(file, off, SEEK_SET, &pos) != 0) {
|
||||||
|
pthread_mutex_unlock(&state->lock);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ext2fs_file_read(file, buf, size, &nread) != 0) {
|
||||||
|
pthread_mutex_unlock(&state->lock);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
pthread_mutex_unlock(&state->lock);
|
||||||
|
|
||||||
|
return nread;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_statfs(const char* param1, struct statvfs* param2)
|
||||||
|
{
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_flush(const char* param1, struct fuse_file_info* ffi)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_release(const char* param1, struct fuse_file_info* ffi)
|
||||||
|
{
|
||||||
|
struct gzfs_priv* priv = GZFS_PRIV(fuse_get_context());
|
||||||
|
ext2_file_t file = (ext2_file_t)ffi->fh;
|
||||||
|
|
||||||
|
pthread_mutex_lock(&priv->file_lock);
|
||||||
|
filemap::iterator itr = priv->file_table.find(file);
|
||||||
|
file_state* state = itr->second;
|
||||||
|
priv->file_table.erase(itr);
|
||||||
|
pthread_mutex_unlock(&priv->file_lock);
|
||||||
|
|
||||||
|
pthread_mutex_destroy(&state->lock);
|
||||||
|
delete state;
|
||||||
|
|
||||||
|
ext2fs_file_close(file);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzfs_readdir(const char* path, void* buf, fuse_fill_dir_t filler, off_t off, struct fuse_file_info* ffi)
|
||||||
|
{
|
||||||
|
struct gzfs_priv* priv = GZFS_PRIV(fuse_get_context());
|
||||||
|
ext2_ino_t inum;
|
||||||
|
|
||||||
|
if (*path != '/') {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!lookup_path(priv, path+1, inum)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
stringlist filenames;
|
||||||
|
if (!lookup_dir(priv, inum, filenames)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
stringlist::iterator itr;
|
||||||
|
for (itr = filenames.begin(); itr != filenames.end(); ++itr) {
|
||||||
|
const string& name = *itr;
|
||||||
|
if (filler(buf, name.c_str(), NULL, 0) != 0) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void*
|
||||||
|
gzfs_init(struct fuse_conn_info *conn)
|
||||||
|
{
|
||||||
|
errcode_t rc;
|
||||||
|
|
||||||
|
struct gzfs_priv* priv = new gzfs_priv;
|
||||||
|
|
||||||
|
priv->filename = strdup(options.filename);
|
||||||
|
pthread_mutex_init(&priv->path_lock, NULL);
|
||||||
|
pthread_mutex_init(&priv->inode_lock, NULL);
|
||||||
|
pthread_mutex_init(&priv->dir_lock, NULL);
|
||||||
|
pthread_mutex_init(&priv->file_lock, NULL);
|
||||||
|
|
||||||
|
rc = ext2fs_open(priv->filename,
|
||||||
|
0 /* flags */,
|
||||||
|
0 /* superblock */,
|
||||||
|
4096 /* block_size */,
|
||||||
|
const_cast<io_manager>(gzext_io_manager),
|
||||||
|
&priv->fs);
|
||||||
|
if (rc != 0) {
|
||||||
|
fprintf(stderr, "Failed to open ext2 filesystem on %s\n", priv->filename);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
return priv;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
gzfs_destroy(void* param)
|
||||||
|
{
|
||||||
|
struct gzfs_priv* priv = GZFS_PRIV(fuse_get_context());
|
||||||
|
|
||||||
|
ext2fs_close(priv->fs);
|
||||||
|
|
||||||
|
delete priv;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct fuse_operations gzfs_oper = {
|
||||||
|
.getattr = gzfs_getattr,
|
||||||
|
.readlink = gzfs_readlink,
|
||||||
|
.getdir = NULL,
|
||||||
|
.mknod = NULL,
|
||||||
|
.mkdir = NULL,
|
||||||
|
.unlink = NULL,
|
||||||
|
.rmdir = NULL,
|
||||||
|
.symlink = NULL,
|
||||||
|
.rename = NULL,
|
||||||
|
.link = NULL,
|
||||||
|
.chmod = NULL,
|
||||||
|
.chown = NULL,
|
||||||
|
.truncate = NULL,
|
||||||
|
.utime = NULL,
|
||||||
|
.open = gzfs_open,
|
||||||
|
.read = gzfs_read,
|
||||||
|
.write = NULL,
|
||||||
|
.statfs = gzfs_statfs,
|
||||||
|
.flush = gzfs_flush,
|
||||||
|
.release = gzfs_release,
|
||||||
|
.fsync = NULL,
|
||||||
|
.setxattr = NULL,
|
||||||
|
.getxattr = NULL,
|
||||||
|
.listxattr = NULL,
|
||||||
|
.removexattr = NULL,
|
||||||
|
.opendir = NULL,
|
||||||
|
.readdir = gzfs_readdir,
|
||||||
|
.releasedir = NULL,
|
||||||
|
.fsyncdir = NULL,
|
||||||
|
.init = gzfs_init,
|
||||||
|
.destroy = gzfs_destroy,
|
||||||
|
.access = NULL,
|
||||||
|
.create = NULL,
|
||||||
|
.ftruncate = NULL,
|
||||||
|
.fgetattr = NULL,
|
||||||
|
.lock = NULL,
|
||||||
|
.utimens = NULL,
|
||||||
|
.bmap = NULL,
|
||||||
|
.flag_nullpath_ok = 0,
|
||||||
|
.flag_nopath = 0,
|
||||||
|
.flag_utime_omit_ok = 0,
|
||||||
|
.flag_reserved = 0,
|
||||||
|
.ioctl = NULL,
|
||||||
|
.poll = NULL,
|
||||||
|
.write_buf = NULL,
|
||||||
|
.read_buf = NULL,
|
||||||
|
.flock = NULL,
|
||||||
|
.fallocate = NULL,
|
||||||
|
};
|
||||||
|
|
||||||
|
#define OPTION(t,p) \
|
||||||
|
{ t, offsetof(struct options, p), 1 }
|
||||||
|
|
||||||
|
static const struct fuse_opt option_spec[] = {
|
||||||
|
OPTION("--filename=%s", filename),
|
||||||
|
OPTION("-h", show_help),
|
||||||
|
OPTION("--help", show_help),
|
||||||
|
FUSE_OPT_END
|
||||||
|
};
|
||||||
|
|
||||||
|
static void
|
||||||
|
usage(const char* argv0)
|
||||||
|
{
|
||||||
|
fprintf(stderr, "Usage: %s --filename=<image.gz> ... <mount>\n", argv0);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
main(int argc, char** argv)
|
||||||
|
{
|
||||||
|
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
|
||||||
|
|
||||||
|
if ((getuid() == 0) || (geteuid() == 0)) {
|
||||||
|
fprintf(stderr, "Refusing to run as root.\n");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (fuse_opt_parse(&args, &options, option_spec, NULL) == -1) {
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (options.show_help) {
|
||||||
|
usage(argv[0]);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!options.filename) {
|
||||||
|
usage(argv[0]);
|
||||||
|
}
|
||||||
|
char* real_filename = NULL;
|
||||||
|
if (options.filename[0] == '/') {
|
||||||
|
real_filename = strdup(options.filename);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
real_filename = (char*)malloc(PATH_MAX + 1);
|
||||||
|
if (realpath(options.filename, real_filename) == NULL) {
|
||||||
|
fprintf(stderr, "Failed to resolve %s\n", options.filename);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
options.filename = real_filename;
|
||||||
|
}
|
||||||
|
|
||||||
|
return fuse_main(args.argc, args.argv, &gzfs_oper, NULL);
|
||||||
|
}
|
|
@ -0,0 +1,283 @@
|
||||||
|
/* gzextio.cxx */
|
||||||
|
|
||||||
|
#include "gzextdef.h"
|
||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <errno.h>
|
||||||
|
|
||||||
|
#include <pthread.h>
|
||||||
|
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <zlib.h>
|
||||||
|
#include <com_err.h>
|
||||||
|
#include <ext2fs/ext2_err.h>
|
||||||
|
#include <ext2fs/ext2_io.h>
|
||||||
|
|
||||||
|
#include "gzextio.h"
|
||||||
|
|
||||||
|
#include <string>
|
||||||
|
#include <vector>
|
||||||
|
#include <map>
|
||||||
|
|
||||||
|
using namespace std;
|
||||||
|
|
||||||
|
typedef map<unsigned long,unsigned char*> blockcache;
|
||||||
|
typedef vector<unsigned long> blockhistory;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Cache roughly 1gb of block data:
|
||||||
|
* 64kb * 16k = 1gb
|
||||||
|
*/
|
||||||
|
#define GZ_CACHE_BLOCKSIZE (1024*1024)
|
||||||
|
#define GZ_CACHE_SIZE (1024)
|
||||||
|
|
||||||
|
struct gz_cache_entry {
|
||||||
|
unsigned long block;
|
||||||
|
unsigned char data[GZ_CACHE_BLOCKSIZE];
|
||||||
|
};
|
||||||
|
|
||||||
|
struct gzio_priv {
|
||||||
|
uint64_t offset;
|
||||||
|
pthread_mutex_t lock;
|
||||||
|
gzFile file;
|
||||||
|
blockcache cache;
|
||||||
|
size_t index;
|
||||||
|
blockhistory history;
|
||||||
|
};
|
||||||
|
#define GZIO_PRIV(p) ((struct gzio_priv*)(p->private_data))
|
||||||
|
|
||||||
|
static unsigned char*
|
||||||
|
fetch_block(struct gzio_priv* priv, unsigned long block)
|
||||||
|
{
|
||||||
|
blockcache::iterator itr = priv->cache.find(block);
|
||||||
|
if (itr != priv->cache.end()) {
|
||||||
|
return itr->second;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (gzseek(priv->file, block * GZ_CACHE_BLOCKSIZE, SEEK_SET) == -1) {
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
unsigned char* data = new unsigned char[GZ_CACHE_BLOCKSIZE];
|
||||||
|
if (gzread(priv->file, data, GZ_CACHE_BLOCKSIZE) != GZ_CACHE_BLOCKSIZE) {
|
||||||
|
delete[] data;
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (priv->cache.size() == GZ_CACHE_SIZE) {
|
||||||
|
unsigned long evict = priv->history[priv->index];
|
||||||
|
itr = priv->cache.find(evict);
|
||||||
|
delete[] itr->second;
|
||||||
|
priv->cache.erase(itr);
|
||||||
|
}
|
||||||
|
|
||||||
|
priv->cache[block] = data;
|
||||||
|
priv->history[priv->index] = block;
|
||||||
|
priv->index = (priv->index + 1) % GZ_CACHE_SIZE;
|
||||||
|
|
||||||
|
return data;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gzio_do_read(struct gzio_priv* priv, void* buf, uint64_t off, uint64_t len)
|
||||||
|
{
|
||||||
|
pthread_mutex_lock(&priv->lock);
|
||||||
|
|
||||||
|
while (len > 0) {
|
||||||
|
unsigned long block = off / GZ_CACHE_BLOCKSIZE;
|
||||||
|
unsigned char* data = fetch_block(priv, block);
|
||||||
|
if (!data) {
|
||||||
|
pthread_mutex_unlock(&priv->lock);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
uint64_t copyoff = off - (block * GZ_CACHE_BLOCKSIZE);
|
||||||
|
uint64_t copylen = GZ_CACHE_BLOCKSIZE - copyoff;
|
||||||
|
if (copylen > len) {
|
||||||
|
copylen = len;
|
||||||
|
}
|
||||||
|
memcpy(buf, data + copyoff, copylen);
|
||||||
|
off += copylen;
|
||||||
|
len -= copylen;
|
||||||
|
buf = (unsigned char*)buf + copylen;
|
||||||
|
}
|
||||||
|
|
||||||
|
pthread_mutex_unlock(&priv->lock);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_open(const char* name, int flags, io_channel* channel)
|
||||||
|
{
|
||||||
|
gzFile gzf = NULL;
|
||||||
|
io_channel io = NULL;
|
||||||
|
struct gzio_priv* priv = NULL;
|
||||||
|
|
||||||
|
gzf = gzopen(name, "rb");
|
||||||
|
if (!gzf) {
|
||||||
|
return errno;
|
||||||
|
}
|
||||||
|
|
||||||
|
io = new struct_io_channel;
|
||||||
|
memset(io, 0, sizeof(*io));
|
||||||
|
io->magic = EXT2_ET_MAGIC_IO_CHANNEL;
|
||||||
|
io->manager = const_cast<io_manager>(gzext_io_manager);
|
||||||
|
io->name = strdup(name);
|
||||||
|
io->block_size = 1024;
|
||||||
|
io->refcount = 1;
|
||||||
|
|
||||||
|
priv = new gzio_priv;
|
||||||
|
memset(priv, 0, sizeof(*priv));
|
||||||
|
pthread_mutex_init(&priv->lock, NULL);
|
||||||
|
priv->file = gzf;
|
||||||
|
priv->cache = blockcache();
|
||||||
|
priv->history = blockhistory(GZ_CACHE_SIZE);
|
||||||
|
|
||||||
|
io->private_data = priv;
|
||||||
|
|
||||||
|
*channel = io;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_close(io_channel channel)
|
||||||
|
{
|
||||||
|
struct gzio_priv* priv = GZIO_PRIV(channel);
|
||||||
|
|
||||||
|
channel->private_data = NULL;
|
||||||
|
gzclose(priv->file);
|
||||||
|
pthread_mutex_destroy(&priv->lock);
|
||||||
|
delete priv;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_set_blksize(io_channel channel, int blksize)
|
||||||
|
{
|
||||||
|
channel->block_size = blksize;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_read_blk(io_channel channel, unsigned long block, int count, void* data)
|
||||||
|
{
|
||||||
|
struct gzio_priv* priv = GZIO_PRIV(channel);
|
||||||
|
uint64_t off;
|
||||||
|
uint64_t len;
|
||||||
|
|
||||||
|
off = priv->offset + block * channel->block_size;
|
||||||
|
len = (count < 0) ? -count : count * channel->block_size;
|
||||||
|
|
||||||
|
return gzio_do_read(priv, data, off, len);
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_write_blk(io_channel channel, unsigned long block, int count, const void* data)
|
||||||
|
{
|
||||||
|
return EXT2_ET_UNIMPLEMENTED;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_flush(io_channel channel)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_write_byte(io_channel channel, unsigned long offset, int count, const void* data)
|
||||||
|
{
|
||||||
|
return EXT2_ET_UNIMPLEMENTED;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_set_option(io_channel channel, const char *option, const char *arg)
|
||||||
|
{
|
||||||
|
struct gzio_priv* priv = GZIO_PRIV(channel);
|
||||||
|
|
||||||
|
if (!strcmp(option, "offset")) {
|
||||||
|
if (!arg) {
|
||||||
|
return EXT2_ET_INVALID_ARGUMENT;
|
||||||
|
}
|
||||||
|
priv->offset = atoi(arg);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
return EXT2_ET_INVALID_ARGUMENT;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_get_stats(io_channel channel, io_stats *io_stats)
|
||||||
|
{
|
||||||
|
return EXT2_ET_UNIMPLEMENTED;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_read_blk64(io_channel channel, unsigned long long block, int count, void *data)
|
||||||
|
{
|
||||||
|
struct gzio_priv* priv = GZIO_PRIV(channel);
|
||||||
|
uint64_t off;
|
||||||
|
uint64_t len;
|
||||||
|
|
||||||
|
off = priv->offset + block * channel->block_size;
|
||||||
|
len = (count < 0) ? -count : count * channel->block_size;
|
||||||
|
|
||||||
|
return gzio_do_read(priv, data, off, len);
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_write_blk64(io_channel channel, unsigned long long block, int count, const void *data)
|
||||||
|
{
|
||||||
|
return EXT2_ET_UNIMPLEMENTED;
|
||||||
|
}
|
||||||
|
|
||||||
|
static errcode_t
|
||||||
|
gzio_discard(io_channel channel, unsigned long long block, unsigned long long count)
|
||||||
|
{
|
||||||
|
return EXT2_ET_UNIMPLEMENTED;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef HAVE_EXT2FS_CACHE_READAHEAD
|
||||||
|
static errcode_t
|
||||||
|
gzio_cache_readahead(io_channel channel, unsigned long long block, unsigned long long count)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef HAVE_EXT2FS_ZEROOUT
|
||||||
|
static errcode_t
|
||||||
|
gzio_zeroout(io_channel channel, unsigned long long block, unsigned long long count)
|
||||||
|
{
|
||||||
|
return EXT2_ET_UNIMPLEMENTED;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
static const struct struct_io_manager struct_gzext_manager = {
|
||||||
|
.magic = EXT2_ET_MAGIC_IO_MANAGER,
|
||||||
|
.name = "gzip I/O Manager",
|
||||||
|
.open = gzio_open,
|
||||||
|
.close = gzio_close,
|
||||||
|
.set_blksize = gzio_set_blksize,
|
||||||
|
.read_blk = gzio_read_blk,
|
||||||
|
.write_blk = gzio_write_blk,
|
||||||
|
.flush = gzio_flush,
|
||||||
|
.write_byte = gzio_write_byte,
|
||||||
|
.set_option = gzio_set_option,
|
||||||
|
.get_stats = gzio_get_stats,
|
||||||
|
.read_blk64 = gzio_read_blk64,
|
||||||
|
.write_blk64 = gzio_write_blk64,
|
||||||
|
.discard = gzio_discard,
|
||||||
|
#ifdef HAVE_EXT2FS_CACHE_READAHEAD
|
||||||
|
.cache_readahead = gzio_cache_readahead,
|
||||||
|
#endif
|
||||||
|
#ifdef HAVE_EXT2FS_ZEROOUT
|
||||||
|
.zeroout = gzio_zeroout,
|
||||||
|
#endif
|
||||||
|
};
|
||||||
|
|
||||||
|
const struct_io_manager* gzext_io_manager = &struct_gzext_manager;
|
Loading…
Reference in New Issue