From fa7f378bf627ddcfd7a93a000149e4d8c3810bf5 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Tue, 30 Apr 2019 01:24:16 +0200 Subject: Initial commit Signed-off-by: David Oberhollenzer --- .gitignore | 21 ++ LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++ Makefile.am | 12 + autogen.sh | 3 + configure.ac | 57 ++++ include/fstree.h | 78 +++++ include/squashfs.h | 177 +++++++++++ lib/Makemodule.am | 5 + lib/fstree/fstree.c | 200 +++++++++++++ lib/fstree/fstree_from_file.c | 436 +++++++++++++++++++++++++++ lib/fstree/fstree_sort.c | 76 +++++ m4/compiler.m4 | 40 +++ mkfs/Makemodule.am | 5 + mkfs/mksquashfs.c | 70 +++++ mkfs/options.c | 295 ++++++++++++++++++ mkfs/options.h | 20 ++ 16 files changed, 2169 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 Makefile.am create mode 100755 autogen.sh create mode 100644 configure.ac create mode 100644 include/fstree.h create mode 100644 include/squashfs.h create mode 100644 lib/Makemodule.am create mode 100644 lib/fstree/fstree.c create mode 100644 lib/fstree/fstree_from_file.c create mode 100644 lib/fstree/fstree_sort.c create mode 100644 m4/compiler.m4 create mode 100644 mkfs/Makemodule.am create mode 100644 mkfs/mksquashfs.c create mode 100644 mkfs/options.c create mode 100644 mkfs/options.h diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d10a7fe --- /dev/null +++ b/.gitignore @@ -0,0 +1,21 @@ +.deps +.dirstamp +.gdb_history +Makefile +Makefile.in +aclocal.m4 +autom4te.cache +compile +config.h.in +config.log +config.status +configure +depcomp +install-sh +missing +stamp-h1 +config.h +*.o +*.a +*~ +mksquashfs diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. 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 +them 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 prevent others from denying you +these rights or asking you to surrender the rights. Therefore, you have +certain responsibilities if you distribute copies of the software, or if +you modify it: responsibilities to respect the freedom of others. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must pass on to the recipients the same +freedoms that you received. 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. + + Developers that use the GNU GPL protect your rights with two steps: +(1) assert copyright on the software, and (2) offer you this License +giving you legal permission to copy, distribute and/or modify it. + + For the developers' and authors' protection, the GPL clearly explains +that there is no warranty for this free software. For both users' and +authors' sake, the GPL requires that modified versions be marked as +changed, so that their problems will not be attributed erroneously to +authors of previous versions. + + Some devices are designed to deny users access to install or run +modified versions of the software inside them, although the manufacturer +can do so. This is fundamentally incompatible with the aim of +protecting users' freedom to change the software. The systematic +pattern of such abuse occurs in the area of products for individuals to +use, which is precisely where it is most unacceptable. Therefore, we +have designed this version of the GPL to prohibit the practice for those +products. If such problems arise substantially in other domains, we +stand ready to extend this provision to those domains in future versions +of the GPL, as needed to protect the freedom of users. + + Finally, every program is threatened constantly by software patents. +States should not allow patents to restrict development and use of +software on general-purpose computers, but in those that do, we wish to +avoid the special danger that patents applied to a free program could +make it effectively proprietary. To prevent this, the GPL assures that +patents cannot be used to render the program non-free. + + The precise terms and conditions for copying, distribution and +modification follow. + + TERMS AND CONDITIONS + + 0. Definitions. + + "This License" refers to version 3 of the GNU General Public License. + + "Copyright" also means copyright-like laws that apply to other kinds of +works, such as semiconductor masks. + + "The Program" refers to any copyrightable work licensed under this +License. Each licensee is addressed as "you". "Licensees" and +"recipients" may be individuals or organizations. + + To "modify" a work means to copy from or adapt all or part of the work +in a fashion requiring copyright permission, other than the making of an +exact copy. The resulting work is called a "modified version" of the +earlier work or a work "based on" the earlier work. + + A "covered work" means either the unmodified Program or a work based +on the Program. + + To "propagate" a work means to do anything with it that, without +permission, would make you directly or secondarily liable for +infringement under applicable copyright law, except executing it on a +computer or modifying a private copy. Propagation includes copying, +distribution (with or without modification), making available to the +public, and in some countries other activities as well. + + To "convey" a work means any kind of propagation that enables other +parties to make or receive copies. Mere interaction with a user through +a computer network, with no transfer of a copy, is not conveying. + + An interactive user interface displays "Appropriate Legal Notices" +to the extent that it includes a convenient and prominently visible +feature that (1) displays an appropriate copyright notice, and (2) +tells the user that there is no warranty for the work (except to the +extent that warranties are provided), that licensees may convey the +work under this License, and how to view a copy of this License. If +the interface presents a list of user commands or options, such as a +menu, a prominent item in the list meets this criterion. + + 1. Source Code. + + The "source code" for a work means the preferred form of the work +for making modifications to it. "Object code" means any non-source +form of a work. + + A "Standard Interface" means an interface that either is an official +standard defined by a recognized standards body, or, in the case of +interfaces specified for a particular programming language, one that +is widely used among developers working in that language. + + The "System Libraries" of an executable work include anything, other +than the work as a whole, that (a) is included in the normal form of +packaging a Major Component, but which is not part of that Major +Component, and (b) serves only to enable use of the work with that +Major Component, or to implement a Standard Interface for which an +implementation is available to the public in source code form. A +"Major Component", in this context, means a major essential component +(kernel, window system, and so on) of the specific operating system +(if any) on which the executable work runs, or a compiler used to +produce the work, or an object code interpreter used to run it. + + The "Corresponding Source" for a work in object code form means all +the source code needed to generate, install, and (for an executable +work) run the object code and to modify the work, including scripts to +control those activities. However, it does not include the work's +System Libraries, or general-purpose tools or generally available free +programs which are used unmodified in performing those activities but +which are not part of the work. For example, Corresponding Source +includes interface definition files associated with source files for +the work, and the source code for shared libraries and dynamically +linked subprograms that the work is specifically designed to require, +such as by intimate data communication or control flow between those +subprograms and other parts of the work. + + The Corresponding Source need not include anything that users +can regenerate automatically from other parts of the Corresponding +Source. + + The Corresponding Source for a work in source code form is that +same work. + + 2. Basic Permissions. + + All rights granted under this License are granted for the term of +copyright on the Program, and are irrevocable provided the stated +conditions are met. This License explicitly affirms your unlimited +permission to run the unmodified Program. The output from running a +covered work is covered by this License only if the output, given its +content, constitutes a covered work. This License acknowledges your +rights of fair use or other equivalent, as provided by copyright law. + + You may make, run and propagate covered works that you do not +convey, without conditions so long as your license otherwise remains +in force. You may convey covered works to others for the sole purpose +of having them make modifications exclusively for you, or provide you +with facilities for running those works, provided that you comply with +the terms of this License in conveying all material for which you do +not control copyright. Those thus making or running the covered works +for you must do so exclusively on your behalf, under your direction +and control, on terms that prohibit them from making any copies of +your copyrighted material outside their relationship with you. + + Conveying under any other circumstances is permitted solely under +the conditions stated below. Sublicensing is not allowed; section 10 +makes it unnecessary. + + 3. Protecting Users' Legal Rights From Anti-Circumvention Law. + + No covered work shall be deemed part of an effective technological +measure under any applicable law fulfilling obligations under article +11 of the WIPO copyright treaty adopted on 20 December 1996, or +similar laws prohibiting or restricting circumvention of such +measures. + + When you convey a covered work, you waive any legal power to forbid +circumvention of technological measures to the extent such circumvention +is effected by exercising rights under this License with respect to +the covered work, and you disclaim any intention to limit operation or +modification of the work as a means of enforcing, against the work's +users, your or third parties' legal rights to forbid circumvention of +technological measures. + + 4. Conveying Verbatim Copies. + + You may convey 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; +keep intact all notices stating that this License and any +non-permissive terms added in accord with section 7 apply to the code; +keep intact all notices of the absence of any warranty; and give all +recipients a copy of this License along with the Program. + + You may charge any price or no price for each copy that you convey, +and you may offer support or warranty protection for a fee. + + 5. Conveying Modified Source Versions. + + You may convey a work based on the Program, or the modifications to +produce it from the Program, in the form of source code under the +terms of section 4, provided that you also meet all of these conditions: + + a) The work must carry prominent notices stating that you modified + it, and giving a relevant date. + + b) The work must carry prominent notices stating that it is + released under this License and any conditions added under section + 7. This requirement modifies the requirement in section 4 to + "keep intact all notices". + + c) You must license the entire work, as a whole, under this + License to anyone who comes into possession of a copy. This + License will therefore apply, along with any applicable section 7 + additional terms, to the whole of the work, and all its parts, + regardless of how they are packaged. This License gives no + permission to license the work in any other way, but it does not + invalidate such permission if you have separately received it. + + d) If the work has interactive user interfaces, each must display + Appropriate Legal Notices; however, if the Program has interactive + interfaces that do not display Appropriate Legal Notices, your + work need not make them do so. + + A compilation of a covered work with other separate and independent +works, which are not by their nature extensions of the covered work, +and which are not combined with it such as to form a larger program, +in or on a volume of a storage or distribution medium, is called an +"aggregate" if the compilation and its resulting copyright are not +used to limit the access or legal rights of the compilation's users +beyond what the individual works permit. Inclusion of a covered work +in an aggregate does not cause this License to apply to the other +parts of the aggregate. + + 6. Conveying Non-Source Forms. + + You may convey a covered work in object code form under the terms +of sections 4 and 5, provided that you also convey the +machine-readable Corresponding Source under the terms of this License, +in one of these ways: + + a) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by the + Corresponding Source fixed on a durable physical medium + customarily used for software interchange. + + b) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by a + written offer, valid for at least three years and valid for as + long as you offer spare parts or customer support for that product + model, to give anyone who possesses the object code either (1) a + copy of the Corresponding Source for all the software in the + product that is covered by this License, on a durable physical + medium customarily used for software interchange, for a price no + more than your reasonable cost of physically performing this + conveying of source, or (2) access to copy the + Corresponding Source from a network server at no charge. + + c) Convey individual copies of the object code with a copy of the + written offer to provide the Corresponding Source. This + alternative is allowed only occasionally and noncommercially, and + only if you received the object code with such an offer, in accord + with subsection 6b. + + d) Convey the object code by offering access from a designated + place (gratis or for a charge), and offer equivalent access to the + Corresponding Source in the same way through the same place at no + further charge. You need not require recipients to copy the + Corresponding Source along with the object code. If the place to + copy the object code is a network server, the Corresponding Source + may be on a different server (operated by you or a third party) + that supports equivalent copying facilities, provided you maintain + clear directions next to the object code saying where to find the + Corresponding Source. Regardless of what server hosts the + Corresponding Source, you remain obligated to ensure that it is + available for as long as needed to satisfy these requirements. + + e) Convey the object code using peer-to-peer transmission, provided + you inform other peers where the object code and Corresponding + Source of the work are being offered to the general public at no + charge under subsection 6d. + + A separable portion of the object code, whose source code is excluded +from the Corresponding Source as a System Library, need not be +included in conveying the object code work. + + A "User Product" is either (1) a "consumer product", which means any +tangible personal property which is normally used for personal, family, +or household purposes, or (2) anything designed or sold for incorporation +into a dwelling. In determining whether a product is a consumer product, +doubtful cases shall be resolved in favor of coverage. For a particular +product received by a particular user, "normally used" refers to a +typical or common use of that class of product, regardless of the status +of the particular user or of the way in which the particular user +actually uses, or expects or is expected to use, the product. A product +is a consumer product regardless of whether the product has substantial +commercial, industrial or non-consumer uses, unless such uses represent +the only significant mode of use of the product. + + "Installation Information" for a User Product means any methods, +procedures, authorization keys, or other information required to install +and execute modified versions of a covered work in that User Product from +a modified version of its Corresponding Source. The information must +suffice to ensure that the continued functioning of the modified object +code is in no case prevented or interfered with solely because +modification has been made. + + If you convey an object code work under this section in, or with, or +specifically for use in, a User Product, and the conveying occurs as +part of a transaction in which the right of possession and use of the +User Product is transferred to the recipient in perpetuity or for a +fixed term (regardless of how the transaction is characterized), the +Corresponding Source conveyed under this section must be accompanied +by the Installation Information. But this requirement does not apply +if neither you nor any third party retains the ability to install +modified object code on the User Product (for example, the work has +been installed in ROM). + + The requirement to provide Installation Information does not include a +requirement to continue to provide support service, warranty, or updates +for a work that has been modified or installed by the recipient, or for +the User Product in which it has been modified or installed. Access to a +network may be denied when the modification itself materially and +adversely affects the operation of the network or violates the rules and +protocols for communication across the network. + + Corresponding Source conveyed, and Installation Information provided, +in accord with this section must be in a format that is publicly +documented (and with an implementation available to the public in +source code form), and must require no special password or key for +unpacking, reading or copying. + + 7. Additional Terms. + + "Additional permissions" are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. +Additional permissions that are applicable to the entire Program shall +be treated as though they were included in this License, to the extent +that they are valid under applicable law. If additional permissions +apply only to part of the Program, that part may be used separately +under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + + When you convey a copy of a covered work, you may at your option +remove any additional permissions from that copy, or from any part of +it. (Additional permissions may be written to require their own +removal in certain cases when you modify the work.) You may place +additional permissions on material, added by you to a covered work, +for which you have or can give appropriate copyright permission. + + Notwithstanding any other provision of this License, for material you +add to a covered work, you may (if authorized by the copyright holders of +that material) supplement the terms of this License with terms: + + a) Disclaiming warranty or limiting liability differently from the + terms of sections 15 and 16 of this License; or + + b) Requiring preservation of specified reasonable legal notices or + author attributions in that material or in the Appropriate Legal + Notices displayed by works containing it; or + + c) Prohibiting misrepresentation of the origin of that material, or + requiring that modified versions of such material be marked in + reasonable ways as different from the original version; or + + d) Limiting the use for publicity purposes of names of licensors or + authors of the material; or + + e) Declining to grant rights under trademark law for use of some + trade names, trademarks, or service marks; or + + f) Requiring indemnification of licensors and authors of that + material by anyone who conveys the material (or modified versions of + it) with contractual assumptions of liability to the recipient, for + any liability that these contractual assumptions directly impose on + those licensors and authors. + + All other non-permissive additional terms are considered "further +restrictions" within the meaning of section 10. If the Program as you +received it, or any part of it, contains a notice stating that it is +governed by this License along with a term that is a further +restriction, you may remove that term. If a license document contains +a further restriction but permits relicensing or conveying under this +License, you may add to a covered work material governed by the terms +of that license document, provided that the further restriction does +not survive such relicensing or conveying. + + If you add terms to a covered work in accord with this section, you +must place, in the relevant source files, a statement of the +additional terms that apply to those files, or a notice indicating +where to find the applicable terms. + + Additional terms, permissive or non-permissive, may be stated in the +form of a separately written license, or stated as exceptions; +the above requirements apply either way. + + 8. Termination. + + You may not propagate or modify a covered work except as expressly +provided under this License. Any attempt otherwise to propagate or +modify it is void, and will automatically terminate your rights under +this License (including any patent licenses granted under the third +paragraph of section 11). + + However, if you cease all violation of this License, then your +license from a particular copyright holder is reinstated (a) +provisionally, unless and until the copyright holder explicitly and +finally terminates your license, and (b) permanently, if the copyright +holder fails to notify you of the violation by some reasonable means +prior to 60 days after the cessation. + + Moreover, your license from a particular copyright holder is +reinstated permanently if the copyright holder notifies you of the +violation by some reasonable means, this is the first time you have +received notice of violation of this License (for any work) from that +copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + + Termination of your rights under this section does not terminate the +licenses of parties who have received copies or rights from you under +this License. If your rights have been terminated and not permanently +reinstated, you do not qualify to receive new licenses for the same +material under section 10. + + 9. Acceptance Not Required for Having Copies. + + You are not required to accept this License in order to receive or +run a copy of the Program. Ancillary propagation of a covered work +occurring solely as a consequence of using peer-to-peer transmission +to receive a copy likewise does not require acceptance. However, +nothing other than this License grants you permission to propagate or +modify any covered work. These actions infringe copyright if you do +not accept this License. Therefore, by modifying or propagating a +covered work, you indicate your acceptance of this License to do so. + + 10. Automatic Licensing of Downstream Recipients. + + Each time you convey a covered work, the recipient automatically +receives a license from the original licensors, to run, modify and +propagate that work, subject to this License. You are not responsible +for enforcing compliance by third parties with this License. + + An "entity transaction" is a transaction transferring control of an +organization, or substantially all assets of one, or subdividing an +organization, or merging organizations. If propagation of a covered +work results from an entity transaction, each party to that +transaction who receives a copy of the work also receives whatever +licenses to the work the party's predecessor in interest had or could +give under the previous paragraph, plus a right to possession of the +Corresponding Source of the work from the predecessor in interest, if +the predecessor has it or can get it with reasonable efforts. + + You may not impose any further restrictions on the exercise of the +rights granted or affirmed under this License. For example, you may +not impose a license fee, royalty, or other charge for exercise of +rights granted under this License, and you may not initiate litigation +(including a cross-claim or counterclaim in a lawsuit) alleging that +any patent claim is infringed by making, using, selling, offering for +sale, or importing the Program or any portion of it. + + 11. Patents. + + A "contributor" is a copyright holder who authorizes use under this +License of the Program or a work on which the Program is based. The +work thus licensed is called the contributor's "contributor version". + + A contributor's "essential patent claims" are all patent claims +owned or controlled by the contributor, whether already acquired or +hereafter acquired, that would be infringed by some manner, permitted +by this License, of making, using, or selling its contributor version, +but do not include claims that would be infringed only as a +consequence of further modification of the contributor version. For +purposes of this definition, "control" includes the right to grant +patent sublicenses in a manner consistent with the requirements of +this License. + + Each contributor grants you a non-exclusive, worldwide, royalty-free +patent license under the contributor's essential patent claims, to +make, use, sell, offer for sale, import and otherwise run, modify and +propagate the contents of its contributor version. + + In the following three paragraphs, a "patent license" is any express +agreement or commitment, however denominated, not to enforce a patent +(such as an express permission to practice a patent or covenant not to +sue for patent infringement). To "grant" such a patent license to a +party means to make such an agreement or commitment not to enforce a +patent against the party. + + If you convey a covered work, knowingly relying on a patent license, +and the Corresponding Source of the work is not available for anyone +to copy, free of charge and under the terms of this License, through a +publicly available network server or other readily accessible means, +then you must either (1) cause the Corresponding Source to be so +available, or (2) arrange to deprive yourself of the benefit of the +patent license for this particular work, or (3) arrange, in a manner +consistent with the requirements of this License, to extend the patent +license to downstream recipients. "Knowingly relying" means you have +actual knowledge that, but for the patent license, your conveying the +covered work in a country, or your recipient's use of the covered work +in a country, would infringe one or more identifiable patents in that +country that you have reason to believe are valid. + + If, pursuant to or in connection with a single transaction or +arrangement, you convey, or propagate by procuring conveyance of, a +covered work, and grant a patent license to some of the parties +receiving the covered work authorizing them to use, propagate, modify +or convey a specific copy of the covered work, then the patent license +you grant is automatically extended to all recipients of the covered +work and works based on it. + + A patent license is "discriminatory" if it does not include within +the scope of its coverage, prohibits the exercise of, or is +conditioned on the non-exercise of one or more of the rights that are +specifically granted under this License. You may not convey a covered +work if you are a party to an arrangement with a third party that is +in the business of distributing software, under which you make payment +to the third party based on the extent of your activity of conveying +the work, and under which the third party grants, to any of the +parties who would receive the covered work from you, a discriminatory +patent license (a) in connection with copies of the covered work +conveyed by you (or copies made from those copies), or (b) primarily +for and in connection with specific products or compilations that +contain the covered work, unless you entered into that arrangement, +or that patent license was granted, prior to 28 March 2007. + + Nothing in this License shall be construed as excluding or limiting +any implied license or other defenses to infringement that may +otherwise be available to you under applicable patent law. + + 12. No Surrender of Others' Freedom. + + If 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 convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. Use with the GNU Affero General Public License. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU Affero General Public License into a single +combined work, and to convey the resulting work. The terms of this +License will continue to apply to the part which is the covered work, +but the special requirements of the GNU Affero General Public License, +section 13, concerning interaction through a network will apply to the +combination as such. + + 14. Revised Versions of this License. + + The Free Software Foundation may publish revised and/or new versions of +the GNU 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 that a certain numbered version of the GNU General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + 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. + + 16. Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +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. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + 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 +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + 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 3 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, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program 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, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU 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 Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..1b8284b --- /dev/null +++ b/Makefile.am @@ -0,0 +1,12 @@ +ACLOCAL_AMFLAGS = -I m4 + +AM_CPPFLAGS = -I$(top_srcdir)/include -D_GNU_SOURCE +AM_CFLAGS = $(WARN_CFLAGS) + +noinst_LIBRARIES = +bin_PROGRAMS = + +EXTRA_DIST = autogen.sh LICENSE + +include lib/Makemodule.am +include mkfs/Makemodule.am diff --git a/autogen.sh b/autogen.sh new file mode 100755 index 0000000..c08fadf --- /dev/null +++ b/autogen.sh @@ -0,0 +1,3 @@ +#!/bin/sh + +autoreconf --force --install --symlink diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..18a4a81 --- /dev/null +++ b/configure.ac @@ -0,0 +1,57 @@ +AC_PREREQ([2.60]) +AC_INIT([squashfs-tools-ng], [0.1], [goliath@sigma-star.at], squashfs-tools-ng) +AC_CONFIG_MACRO_DIR([m4]) +AM_INIT_AUTOMAKE([foreign dist-xz subdir-objects]) +AM_SILENT_RULES([yes]) +AC_PROG_CC +AC_PROG_CC_C99 +AC_PROG_RANLIB +AC_PROG_INSTALL + +m4_ifndef([PKG_PROG_PKG_CONFIG], + [m4_fatal([Could not locate the pkg-config autoconf + macros. These are usually located in /usr/share/aclocal/pkg.m4. + If your macros are in a different location, try setting the + environment variable AL_OPTS="-I/other/macro/dir" before running + ./autogen.sh or autoreconf again. Make sure pkg-config is installed.])]) +PKG_PROG_PKG_CONFIG + +UL_WARN_ADD([-Wall]) +UL_WARN_ADD([-Wextra]) +UL_WARN_ADD([-Wunused]) +UL_WARN_ADD([-Wmissing-prototypes]) +UL_WARN_ADD([-Wmissing-declarations]) +UL_WARN_ADD([-Wwrite-strings]) +UL_WARN_ADD([-Wjump-misses-init]) +UL_WARN_ADD([-Wuninitialized]) +UL_WARN_ADD([-Winit-self]) +UL_WARN_ADD([-Wlogical-op]) +UL_WARN_ADD([-Wunused-but-set-parameter]) +UL_WARN_ADD([-Wunused-but-set-variable]) +UL_WARN_ADD([-Wunused-parameter]) +UL_WARN_ADD([-Wunused-result]) +UL_WARN_ADD([-Wunused-variable]) +UL_WARN_ADD([-Wduplicated-cond]) +UL_WARN_ADD([-Wduplicated-branches]) +UL_WARN_ADD([-Wrestrict]) +UL_WARN_ADD([-Wnull-dereference]) +UL_WARN_ADD([-pedantic]) + +AC_SUBST([WARN_CFLAGS]) + +##### search for dependencies ##### + +have_zlib="no" +have_lzma="no" + +PKG_CHECK_MODULES(ZLIB, [zlib], [have_zlib="yes"], []) +PKG_CHECK_MODULES(XZ, [liblzma >= 5.0.0], [have_lzma="yes"], []) + +AM_CONDITIONAL([WITH_ZLIB], [test "x$have_zlib" == "xyes"]) +AM_CONDITIONAL([WITH_LZMA], [test "x$have_lzma" == "xyes"]) + +##### generate output ##### + +AC_CONFIG_HEADERS([config.h]) + +AC_OUTPUT([Makefile]) diff --git a/include/fstree.h b/include/fstree.h new file mode 100644 index 0000000..68bbc7d --- /dev/null +++ b/include/fstree.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#ifndef FSTREE_H +#define FSTREE_H + +#include +#include +#include +#include +#include + +typedef struct tree_node_t tree_node_t; +typedef struct file_info_t file_info_t; +typedef struct dir_info_t dir_info_t; +typedef struct fstree_t fstree_t; + +struct file_info_t { + char *input_file; + file_info_t *frag_next; + uint64_t size; + uint64_t startblock; + uint32_t fragment; + uint32_t fragment_offset; + uint32_t blocksizes[]; +}; + +struct dir_info_t { + tree_node_t *children; + uint64_t size; + uint64_t start_block; + uint32_t block_offset; + bool created_implicitly; +}; + +struct tree_node_t { + tree_node_t *next; + char *name; + uint32_t uid; + uint32_t gid; + uint16_t mode; + + union { + dir_info_t *dir; + file_info_t *file; + char *slink_target; + uint64_t devno; + } data; + + uint8_t payload[]; +}; + +struct fstree_t { + uint32_t default_uid; + uint32_t default_gid; + uint32_t default_mode; + uint32_t default_mtime; + size_t block_size; + + tree_node_t *root; +}; + +int fstree_init(fstree_t *fs, size_t block_size, uint32_t mtime, + uint16_t default_mode, uint32_t default_uid, + uint32_t default_gid); + +void fstree_cleanup(fstree_t *fs); + +tree_node_t *fstree_add(fstree_t *fs, const char *path, uint16_t mode, + uint32_t uid, uint32_t gid, size_t extra_len); + +tree_node_t *fstree_add_file(fstree_t *fs, const char *path, uint16_t mode, + uint32_t uid, uint32_t gid, uint64_t filesz, + const char *input); + +int fstree_from_file(fstree_t *fs, const char *filename); + +void fstree_sort(fstree_t *fs); + +#endif /* FSTREE_H */ diff --git a/include/squashfs.h b/include/squashfs.h new file mode 100644 index 0000000..68f9fce --- /dev/null +++ b/include/squashfs.h @@ -0,0 +1,177 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#ifndef SQUASHFS_H +#define SQUASHFS_H + +#include + +#define SQFS_MAGIC 0x73717368 +#define SQFS_VERSION_MAJOR 4 +#define SQFS_VERSION_MINOR 0 +#define SQFS_META_BLOCK_SIZE 8192 +#define SQFS_DEFAULT_BLOCK_SIZE 131072 +#define SQFS_DEVBLK_SIZE 4096 +#define SQFS_MAX_DIR_ENT 256 + +typedef struct { + uint32_t magic; + uint32_t inode_count; + uint32_t modification_time; + uint32_t block_size; + uint32_t fragment_entry_count; + uint16_t compression_id; + uint16_t block_log; + uint16_t flags; + uint16_t id_count; + uint16_t version_major; + uint16_t version_minor; + uint64_t root_inode_ref; + uint64_t bytes_used; + uint64_t id_table_start; + uint64_t xattr_id_table_start; + uint64_t inode_table_start; + uint64_t directory_table_start; + uint64_t fragment_table_start; + uint64_t export_table_start; +} __attribute__((packed)) sqfs_super_t; + +typedef struct { + uint64_t start_offset; + uint32_t size; + uint32_t pad0; +} sqfs_fragment_t; + +typedef struct { + uint16_t type; + uint16_t mode; + uint16_t uid_idx; + uint16_t gid_idx; + uint32_t mod_time; + uint32_t inode_number; +} sqfs_inode_t; + +typedef struct { + uint32_t nlink; + uint32_t devno; +} sqfs_inode_dev_t; + +typedef struct { + uint32_t nlink; + uint32_t devno; + uint32_t xattr_idx; +} sqfs_inode_dev_ext_t; + +typedef struct { + uint32_t nlink; + uint32_t target_size; + uint8_t target[]; +} sqfs_inode_slink_t; + +typedef struct { + uint32_t blocks_start; + uint32_t fragment_index; + uint32_t fragment_offset; + uint32_t file_size; + uint32_t block_sizes[]; +} sqfs_inode_file_t; + +typedef struct { + uint64_t blocks_start; + uint64_t file_size; + uint64_t sparse; + uint32_t nlink; + uint32_t fragment_idx; + uint32_t fragment_offset; + uint32_t xattr_idx; + uint32_t block_sizes[]; +} sqfs_inode_file_ext_t; + +typedef struct { + uint32_t start_block; + uint32_t nlink; + uint16_t size; + uint16_t offset; + uint32_t parent_inode; +} sqfs_inode_dir_t; + +typedef struct { + uint32_t nlink; + uint32_t size; + uint32_t start_block; + uint32_t parent_inode; + uint16_t inodex_count; + uint16_t offset; + uint32_t xattr_idx; +} sqfs_inode_dir_ext_t; + +typedef union { + sqfs_inode_t inode; + + union { + sqfs_inode_dev_t dev; + sqfs_inode_dev_ext_t dev_ext; + sqfs_inode_slink_t slink; + sqfs_inode_file_t file; + sqfs_inode_file_ext_t file_ext; + sqfs_inode_dir_t dir; + sqfs_inode_dir_ext_t dir_ext; + } data; +} sqfs_inode_generic_t; + +typedef struct { + uint32_t count; + uint32_t start_block; + uint32_t inode_number; +} sqfs_dir_header_t; + +typedef struct { + uint16_t offset; + uint16_t inode_number; + uint16_t type; + uint16_t size; + uint8_t name[]; +} sqfs_dir_entry_t; + +typedef enum { + SQFS_COMP_GZIP = 1, + SQFS_COMP_LZMA = 2, + SQFS_COMP_LZO = 3, + SQFS_COMP_XZ = 4, + SQFS_COMP_LZ4 = 5, + SQFS_COMP_ZSTD = 6, + + SQFS_COMP_MIN = 1, + SQFS_COMP_MAX = 6, +} E_SQFS_COMPRESSOR; + +typedef enum { + SQFS_FLAG_UNCOMPRESSED_INODES = 0x0001, + SQFS_FLAG_UNCOMPRESSED_DATA = 0x0002, + SQFS_FLAG_UNCOMPRESSED_FRAGMENTS = 0x0008, + SQFS_FLAG_NO_FRAGMENTS = 0x0010, + SQFS_FLAG_ALWAYS_FRAGMENTS = 0x0020, + SQFS_FLAG_DUPLICATES = 0x0040, + SQFS_FLAG_EXPORTABLE = 0x0080, + SQFS_FLAG_UNCOMPRESSED_XATTRS = 0x0100, + SQFS_FLAG_NO_XATTRS = 0x0200, + SQFS_FLAG_COMPRESSOR_OPTIONS = 0x0400, + SQFS_FLAG_UNCOMPRESSED_IDS = 0x0800, +} E_SQFS_SUPER_FLAGS; + +typedef enum { + SQFS_INODE_DIR = 1, + SQFS_INODE_FILE = 2, + SQFS_INODE_SLINK = 3, + SQFS_INODE_BDEV = 4, + SQFS_INODE_CDEV = 5, + SQFS_INODE_FIFO = 6, + SQFS_INODE_SOCKET = 7, + SQFS_INODE_EXT_DIR = 8, + SQFS_INODE_EXT_FILE = 9, + SQFS_INODE_EXT_SLINK = 10, + SQFS_INODE_EXT_BDEV = 11, + SQFS_INODE_EXT_CDEV = 12, + SQFS_INODE_EXT_FIFO = 13, + SQFS_INODE_EXT_SOCKET = 14, +} E_SQFS_INODE_TYPE; + +#endif /* SQUASHFS_H */ diff --git a/lib/Makemodule.am b/lib/Makemodule.am new file mode 100644 index 0000000..18ec8c4 --- /dev/null +++ b/lib/Makemodule.am @@ -0,0 +1,5 @@ +libfstree_a_SOURCES = lib/fstree/fstree.c lib/fstree/fstree_from_file.c +libfstree_a_SOURCES += lib/fstree/fstree_sort.c +libfstree_a_SOURCES += include/fstree.h + +noinst_LIBRARIES += libfstree.a diff --git a/lib/fstree/fstree.c b/lib/fstree/fstree.c new file mode 100644 index 0000000..2722b4a --- /dev/null +++ b/lib/fstree/fstree.c @@ -0,0 +1,200 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#include "fstree.h" + +#include +#include +#include +#include + +static tree_node_t *mknode(tree_node_t *parent, const char *name, + size_t name_len, size_t extra_len, + uint16_t mode, uint32_t uid, uint32_t gid) +{ + size_t size = sizeof(tree_node_t) + extra_len; + tree_node_t *n; + + switch (mode & S_IFMT) { + case S_IFDIR: + size += sizeof(*n->data.dir); + break; + case S_IFREG: + size += sizeof(*n->data.file); + break; + } + + n = calloc(1, size + name_len + 1); + if (n == NULL) + return NULL; + + if (parent != NULL) { + n->next = parent->data.dir->children; + parent->data.dir->children = n; + } + + n->uid = uid; + n->gid = gid; + n->mode = mode; + + switch (mode & S_IFMT) { + case S_IFDIR: + n->data.dir = (dir_info_t *)n->payload; + break; + case S_IFREG: + n->data.file = (file_info_t *)n->payload; + break; + case S_IFLNK: + n->data.slink_target = (char *)n->payload; + break; + } + + n->name = (char *)n + size; + memcpy(n->name, name, name_len); + return n; +} + +static void free_recursive(tree_node_t *n) +{ + tree_node_t *it; + + if (S_ISDIR(n->mode)) { + while (n->data.dir->children != NULL) { + it = n->data.dir->children; + n->data.dir->children = it->next; + + free_recursive(it); + } + } + + free(n); +} + +static tree_node_t *child_by_name(tree_node_t *root, const char *name, + size_t len) +{ + tree_node_t *n = root->data.dir->children; + + while (n != NULL) { + if (strncmp(n->name, name, len) == 0 && n->name[len] == '\0') + break; + + n = n->next; + } + + return n; +} + +static tree_node_t *get_parent_node(fstree_t *fs, tree_node_t *root, + const char *path) +{ + const char *end; + tree_node_t *n; + + for (;;) { + if (!S_ISDIR(root->mode)) { + errno = ENOTDIR; + return NULL; + } + + end = strchr(path, '/'); + if (end == NULL) + break; + + n = child_by_name(root, path, end - path); + + if (n == NULL) { + n = mknode(root, path, end - path, 0, + S_IFDIR | fs->default_mode, + fs->default_uid, fs->default_gid); + if (n == NULL) + return NULL; + + n->data.dir->created_implicitly = true; + } + + root = n; + path = end + 1; + } + + return root; +} + +tree_node_t *fstree_add(fstree_t *fs, const char *path, uint16_t mode, + uint32_t uid, uint32_t gid, size_t extra_len) +{ + tree_node_t *child, *parent; + const char *name; + + name = strrchr(path, '/'); + name = (name == NULL ? path : (name + 1)); + + parent = get_parent_node(fs, fs->root, path); + if (parent == NULL) + return NULL; + + child = child_by_name(parent, name, strlen(name)); + if (child != NULL) { + if (S_ISDIR(child->mode) && S_ISDIR(mode) && + child->data.dir->created_implicitly) { + child->data.dir->created_implicitly = false; + return child; + } + + errno = EEXIST; + return NULL; + } + + return mknode(parent, name, strlen(name), extra_len, mode, uid, gid); +} + +tree_node_t *fstree_add_file(fstree_t *fs, const char *path, uint16_t mode, + uint32_t uid, uint32_t gid, uint64_t filesz, + const char *input) +{ + tree_node_t *node; + size_t count, extra; + char *ptr; + + count = filesz / fs->block_size; + extra = sizeof(uint32_t) * count + strlen(input) + 1; + + mode &= 07777; + node = fstree_add(fs, path, S_IFREG | mode, uid, gid, extra); + + if (node != NULL) { + ptr = (char *)(node->data.file->blocksizes + count); + strcpy(ptr, input); + + node->data.file->input_file = ptr; + node->data.file->size = filesz; + } + return node; +} + +int fstree_init(fstree_t *fs, size_t block_size, uint32_t mtime, + uint16_t default_mode, uint32_t default_uid, + uint32_t default_gid) +{ + memset(fs, 0, sizeof(*fs)); + + fs->default_uid = default_uid; + fs->default_gid = default_gid; + fs->default_mode = default_mode & 07777; + fs->default_mtime = mtime; + fs->block_size = block_size; + + fs->root = mknode(NULL, "", 0, 0, S_IFDIR | fs->default_mode, + default_uid, default_gid); + + if (fs->root == NULL) { + perror("initializing file system tree"); + return -1; + } + + return 0; +} + +void fstree_cleanup(fstree_t *fs) +{ + free_recursive(fs->root); + memset(fs, 0, sizeof(*fs)); +} diff --git a/lib/fstree/fstree_from_file.c b/lib/fstree/fstree_from_file.c new file mode 100644 index 0000000..66d71a2 --- /dev/null +++ b/lib/fstree/fstree_from_file.c @@ -0,0 +1,436 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#include "fstree.h" + +#include +#include +#include +#include +#include +#include +#include +#include + +static int add_dir(fstree_t *fs, const char *filename, size_t line_num, + const char *path, uint16_t mode, uint32_t uid, + uint32_t gid, const char *extra) +{ + if (extra != NULL && *extra != '\0') { + fprintf(stderr, "%s: %zu: WARNING: ignoring extra arguments\n", + filename, line_num); + } + + if (fstree_add(fs, path, S_IFDIR | mode, uid, gid, 0) == NULL) { + fprintf(stderr, "%s: %zu: mkdir -p %s: %s\n", + filename, line_num, path, strerror(errno)); + return -1; + } + + return 0; +} + +static int add_slink(fstree_t *fs, const char *filename, size_t line_num, + const char *path, uint16_t mode, uint32_t uid, + uint32_t gid, const char *extra) +{ + tree_node_t *node; + (void)mode; + + if (extra == NULL || *extra == '\0') { + fprintf(stderr, "%s: %zu: missing symlink target\n", + filename, line_num); + return -1; + } + + node = fstree_add(fs, path, S_IFLNK | 0777, uid, gid, + strlen(extra) + 1); + + if (node == NULL) { + fprintf(stderr, "%s: %zu: ln -s %s %s\n", + filename, line_num, extra, path); + return -1; + } + + strcpy(node->data.slink_target, extra); + return 0; +} + +static int add_device(fstree_t *fs, const char *filename, size_t line_num, + const char *path, uint16_t mode, uint32_t uid, + uint32_t gid, const char *extra) +{ + unsigned int maj = 0, min = 0; + tree_node_t *node; + + if (extra == NULL || *extra == '\0') { + fprintf(stderr, "%s: %zu: missing device type\n", + filename, line_num); + return -1; + } + + if ((*extra == 'c' || *extra == 'C') && isspace(extra[1])) { + mode |= S_IFCHR; + } else if ((*extra == 'b' || *extra == 'B') && isspace(extra[1])) { + mode |= S_IFBLK; + } else { + fprintf(stderr, "%s: %zu: unsupported device type", + filename, line_num); + return -1; + } + + ++extra; + while (isspace(*extra)) + ++extra; + + if (!isdigit(*extra)) + goto fail_devno; + + while (isdigit(*extra)) + maj = maj * 10 + *(extra++) - '0'; + + if (*(extra++) != ':') + goto fail_devno; + + if (!isdigit(*extra)) + goto fail_devno; + + while (isdigit(*extra)) + min = min * 10 + *(extra++) - '0'; + + while (isspace(*extra)) + ++extra; + + if (*extra != '\0') { + fprintf(stderr, "%s: %zu: WARNING: ignoring extra arguments\n", + filename, line_num); + } + + node = fstree_add(fs, path, mode, uid, gid, 0); + if (node == NULL) { + fprintf(stderr, "%s: %zu: mknod %s %c %u %u: %s\n", + filename, line_num, path, S_ISCHR(mode) ? 'c' : 'b', + maj, min, strerror(errno)); + return -1; + } + + node->data.devno = makedev(maj, min); + return 0; +fail_devno: + fprintf(stderr, "%s: %zu: error in device number format\n", + filename, line_num); + return -1; +} + +static int add_pipe(fstree_t *fs, const char *filename, size_t line_num, + const char *path, uint16_t mode, uint32_t uid, + uint32_t gid, const char *extra) +{ + if (extra != NULL && *extra != '\0') { + fprintf(stderr, "%s: %zu: WARNING: ignoring extra arguments\n", + filename, line_num); + } + + if (fstree_add(fs, path, S_IFIFO | mode, uid, gid, 0) == NULL) { + fprintf(stderr, "%s: %zu: mkfifo %s: %s\n", + filename, line_num, path, strerror(errno)); + return -1; + } + + return 0; +} + +static int add_socket(fstree_t *fs, const char *filename, size_t line_num, + const char *path, uint16_t mode, uint32_t uid, + uint32_t gid, const char *extra) +{ + if (extra != NULL && *extra != '\0') { + fprintf(stderr, "%s: %zu: WARNING: ignoring extra arguments\n", + filename, line_num); + } + + if (fstree_add(fs, path, S_IFSOCK | mode, uid, gid, 0) == NULL) { + fprintf(stderr, "%s: %zu: creating Unix socket %s: %s\n", + filename, line_num, path, strerror(errno)); + return -1; + } + + return 0; +} + +static int add_file(fstree_t *fs, const char *filename, size_t line_num, + const char *path, uint16_t mode, uint32_t uid, + uint32_t gid, const char *extra) +{ + char *infile = NULL; + tree_node_t *node; + const char *ptr; + struct stat sb; + int ret; + + ptr = strrchr(filename, '/'); + + if (extra == NULL || *extra == '\0') { + if (ptr == NULL) { + extra = path; + } else { + ret = asprintf(&infile, "%.*s/%s", + (int)(filename - ptr), filename, path); + if (ret < 0) + goto fail_asprintf; + } + } else if (*extra != '/' && ptr != NULL) { + ret = asprintf(&infile, "%.*s/%s", + (int)(filename - ptr), filename, extra); + if (ret < 0) + goto fail_asprintf; + } + + if (infile != NULL) + extra = infile; + + if (stat(extra, &sb) != 0) { + fprintf(stderr, "%s: %zu: stat %s: %s\n", filename, line_num, + extra, strerror(errno)); + goto fail; + } + + node = fstree_add_file(fs, path, mode, uid, gid, sb.st_size, extra); + + if (node == NULL) { + fprintf(stderr, "%s: %zu: adding %s as %s: %s\n", + filename, line_num, extra, path, strerror(errno)); + goto fail; + } + + free(infile); + return 0; +fail: + free(infile); + return -1; +fail_asprintf: + fprintf(stderr, "%s: %zu: pasting together file path: %s\n", + filename, line_num, strerror(errno)); + return -1; +} + +static const struct { + const char *keyword; + int (*callback)(fstree_t *fs, const char *filename, size_t line_num, + const char *path, uint16_t mode, uint32_t uid, + uint32_t gid, const char *extra); +} file_list_hooks[] = { + { "dir", add_dir }, + { "slink", add_slink }, + { "nod", add_device }, + { "pipe", add_pipe }, + { "pipe", add_socket }, + { "file", add_file }, +}; + +#define NUM_HOOKS (sizeof(file_list_hooks) / sizeof(file_list_hooks[0])) + +static void trim_line(char *line) +{ + size_t i; + + for (i = 0; isspace(line[i]); ++i) + ; + + if (line[i] == '#') { + line[0] = '\0'; + return; + } + + if (i > 0) + memmove(line, line + i, strlen(line + i) + 1); + + i = strlen(line); + while (i > 0 && isspace(line[i - 1])) + --i; + + line[i] = '\0'; +} + +static int handle_line(fstree_t *fs, const char *filename, + size_t line_num, char *line) +{ + const char *path, *extra = NULL, *msg = NULL; + unsigned int mode = 0, uid = 0, gid = 0, x; + char keyword[16]; + size_t i; + + /* isolate keyword */ + for (i = 0; isalpha(line[i]); ++i) + ; + + if (i >= sizeof(keyword) || i == 0 || !isspace(line[i])) + goto fail_ent; + + memcpy(keyword, line, i); + keyword[i] = '\0'; + + while (isspace(line[i])) + ++i; + + /* isolate path */ + path = line + i; + + for (; line[i] != '\0'; ++i) { + /* TODO: escape sequences to support spaces in path */ + + if (isspace(line[i])) + break; + } + + if (!isspace(line[i])) + goto fail_ent; + + line[i++] = '\0'; + while (isspace(line[i])) + ++i; + + /* mode */ + if (!isdigit(line[i])) + goto fail_mode; + + for (; isdigit(line[i]); ++i) { + if (line[i] > '7') + goto fail_mode; + + mode = (mode << 3) | (line[i] - '0'); + + if (mode > 07777) + goto fail_mode_bits; + } + + if (!isspace(line[i])) + goto fail_ent; + + while (isspace(line[i])) + ++i; + + /* uid */ + if (!isdigit(line[i])) + goto fail_uid_gid; + + for (; isdigit(line[i]); ++i) { + x = line[i] - '0'; + + if (uid > (0xFFFFFFFF - x) / 10) + goto fail_ov; + + uid = uid * 10 + x; + } + + if (!isspace(line[i])) + goto fail_ent; + + while (isspace(line[i])) + ++i; + + /* gid */ + if (!isdigit(line[i])) + goto fail_uid_gid; + + for (; isdigit(line[i]); ++i) { + x = line[i] - '0'; + + if (gid > (0xFFFFFFFF - x) / 10) + goto fail_ov; + + gid = gid * 10 + x; + } + + /* extra */ + if (isspace(line[i])) { + while (isspace(line[i])) + ++i; + + if (line[i] != '\0') + extra = line + i; + } + + /* forward to callback */ + for (i = 0; i < NUM_HOOKS; ++i) { + if (strcmp(file_list_hooks[i].keyword, keyword) == 0) { + return file_list_hooks[i].callback(fs, filename, + line_num, path, + mode, uid, gid, + extra); + } + } + + fprintf(stderr, "%s: %zu: unknown entry type '%s'.\n", filename, + line_num, keyword); + return -1; +fail_ov: + msg = "numeric overflow"; + goto fail_ent; +fail_uid_gid: + msg = "uid & gid must be decimal numbers"; + goto out_desc; +fail_mode: + msg = "mode must be an octal number"; + goto out_desc; +fail_mode_bits: + msg = "you can only set the permission bits in the mode"; + goto out_desc; +fail_ent: + msg = "error in entry description"; + goto out_desc; +out_desc: + fprintf(stderr, "%s: %zu: %s.\n", filename, line_num, msg); + fputs("expected: []\n", + stderr); + return -1; +} + +int fstree_from_file(fstree_t *fs, const char *filename) +{ + FILE *fp = fopen(filename, "rb"); + size_t n, line_num = 0; + ssize_t ret; + char *line; + + if (fp == NULL) { + perror(filename); + return -1; + } + + for (;;) { + line = NULL; + n = 0; + errno = 0; + + ret = getline(&line, &n, fp); + ++line_num; + + if (ret < 0) { + if (errno == 0) { + free(line); + break; + } + + perror(filename); + goto fail_line; + } + + trim_line(line); + + if (line[0] == '\0') { + free(line); + continue; + } + + if (handle_line(fs, filename, line_num, line)) + goto fail_line; + + free(line); + } + + fclose(fp); + return 0; +fail_line: + free(line); + fclose(fp); + return -1; +} diff --git a/lib/fstree/fstree_sort.c b/lib/fstree/fstree_sort.c new file mode 100644 index 0000000..9f07c92 --- /dev/null +++ b/lib/fstree/fstree_sort.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#include "fstree.h" + +#include + +static tree_node_t *sort_list(tree_node_t *head) +{ + tree_node_t *it, *prev, *lhs, *rhs; + size_t i, count = 0; + + for (it = head; it != NULL; it = it->next) + ++count; + + if (count < 2) + return head; + + prev = NULL; + it = head; + + for (i = 0; i < count / 2; ++i) { + prev = it; + it = it->next; + } + + prev->next = NULL; + + lhs = sort_list(head); + rhs = sort_list(it); + + head = NULL; + prev = NULL; + + while (lhs != NULL && rhs != NULL) { + if (strcmp(lhs->name, rhs->name) <= 0) { + it = lhs; + lhs = lhs->next; + } else { + it = rhs; + rhs = rhs->next; + } + + it->next = NULL; + + if (prev != NULL) { + prev->next = it; + prev = it; + } else { + prev = head = it; + } + } + + it = (lhs != NULL ? lhs : rhs); + + if (prev != NULL) { + prev->next = it; + } else { + head = it; + } + + return head; +} + +static void sort_directory(tree_node_t *n) +{ + n->data.dir->children = sort_list(n->data.dir->children); + + for (n = n->data.dir->children; n != NULL; n = n->next) { + if (S_ISDIR(n->mode)) + sort_directory(n); + } +} + +void fstree_sort(fstree_t *fs) +{ + sort_directory(fs->root); +} diff --git a/m4/compiler.m4 b/m4/compiler.m4 new file mode 100644 index 0000000..058c73f --- /dev/null +++ b/m4/compiler.m4 @@ -0,0 +1,40 @@ +dnl Copyright (C) 2008-2011 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl From Simon Josefsson +dnl -- derivated from coreutils m4/warnings.m4 + +# UL_AS_VAR_APPEND(VAR, VALUE) +# ---------------------------- +# Provide the functionality of AS_VAR_APPEND if Autoconf does not have it. +m4_ifdef([AS_VAR_APPEND], +[m4_copy([AS_VAR_APPEND], [UL_AS_VAR_APPEND])], +[m4_define([UL_AS_VAR_APPEND], +[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) + +# UL_ADD_WARN(COMPILER_OPTION [, VARNAME]) +# ------------------------ +# Adds parameter to WARN_CFLAGS (or to $VARNAME) if the compiler supports it. +AC_DEFUN([UL_WARN_ADD], [ + m4_define([warnvarname], m4_default([$2],WARN_CFLAGS)) + AS_VAR_PUSHDEF([ul_Warn], [ul_cv_warn_$1])dnl + AC_CACHE_CHECK([whether compiler handles $1], m4_defn([ul_Warn]), [ + # store AC_LANG_WERROR status, then turn it on + save_ac_[]_AC_LANG_ABBREV[]_werror_flag="${ac_[]_AC_LANG_ABBREV[]_werror_flag}" + AC_LANG_WERROR + + ul_save_CPPFLAGS="$CPPFLAGS" + CPPFLAGS="-Werror ${CPPFLAGS} $1" + AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], + [AS_VAR_SET(ul_Warn, [yes])], + [AS_VAR_SET(ul_Warn, [no])]) + # restore AC_LANG_WERROR + ac_[]_AC_LANG_ABBREV[]_werror_flag="${save_ac_[]_AC_LANG_ABBREV[]_werror_flag}" + + CPPFLAGS="$ul_save_CPPFLAGS" + ]) + AS_VAR_IF(ul_Warn, [yes], [UL_AS_VAR_APPEND(warnvarname, [" $1"])]) +]) + diff --git a/mkfs/Makemodule.am b/mkfs/Makemodule.am new file mode 100644 index 0000000..1d062b9 --- /dev/null +++ b/mkfs/Makemodule.am @@ -0,0 +1,5 @@ +mksquashfs_SOURCES = mkfs/mksquashfs.c mkfs/options.c mkfs/options.h +mksquashfs_SOURCES += include/squashfs.h +mksquashfs_LDADD = libfstree.a + +bin_PROGRAMS += mksquashfs diff --git a/mkfs/mksquashfs.c b/mkfs/mksquashfs.c new file mode 100644 index 0000000..bc2a215 --- /dev/null +++ b/mkfs/mksquashfs.c @@ -0,0 +1,70 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#include "squashfs.h" +#include "options.h" +#include "fstree.h" + +#include +#include +#include +#include +#include +#include + +static void print_tree(int level, tree_node_t *node) +{ + tree_node_t *n; + int i; + + for (i = 1; i < level; ++i) { + fputs("| ", stdout); + } + + if (level) + fputs("+- ", stdout); + + if (S_ISDIR(node->mode)) { + fprintf(stdout, "%s/ (%u, %u, 0%o)\n", node->name, + node->uid, node->gid, node->mode & 07777); + + for (n = node->data.dir->children; n != NULL; n = n->next) { + print_tree(level + 1, n); + } + + if (node->data.dir->children != NULL) { + for (i = 0; i < level; ++i) + fputs("| ", stdout); + + if (level) + fputc('\n', stdout); + } + } else { + fprintf(stdout, "%s (%u, %u, 0%o)\n", node->name, + node->uid, node->gid, node->mode & 07777); + } +} + + +int main(int argc, char **argv) +{ + options_t opt; + fstree_t fs; + + process_command_line(&opt, argc, argv); + + if (fstree_init(&fs, opt.blksz, opt.def_mtime, opt.def_mode, + opt.def_uid, opt.def_gid)) { + return EXIT_FAILURE; + } + + if (fstree_from_file(&fs, opt.infile)) { + fstree_cleanup(&fs); + return EXIT_FAILURE; + } + + fstree_sort(&fs); + + print_tree(0, fs.root); + + fstree_cleanup(&fs); + return EXIT_SUCCESS; +} diff --git a/mkfs/options.c b/mkfs/options.c new file mode 100644 index 0000000..513e76a --- /dev/null +++ b/mkfs/options.c @@ -0,0 +1,295 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#include "squashfs.h" +#include "options.h" +#include "config.h" + +#include +#include +#include +#include +#include +#include +#include +#include + +static struct option long_opts[] = { + { "compressor", required_argument, NULL, 'c' }, + { "block-size", required_argument, NULL, 'b' }, + { "dev-block-size", required_argument, NULL, 'B' }, + { "defaults", required_argument, NULL, 'd' }, + { "force", no_argument, NULL, 'f' }, + { "version", no_argument, NULL, 'V' }, + { "help", no_argument, NULL, 'h' }, +}; + +static const char *short_opts = "c:b:B:d:fhV"; + +enum { + DEF_UID = 0, + DEF_GID, + DEF_MODE, + DEF_MTIME, +}; + +static const char *defaults[] = { + [DEF_UID] = "uid", + [DEF_GID] = "gid", + [DEF_MODE] = "mode", + [DEF_MTIME] = "mtime", + NULL +}; + +#define LICENSE_SHORT "GPLv3+" +#define LICENSE_LONG "GNU GPL version 3 or later" +#define LICENSE_URL "https://gnu.org/licenses/gpl.html" + +extern char *__progname; + +static const char *version_string = +"%s (%s) %s\n" +"Copyright (c) 2019 David Oberhollenzer\n" +"License " LICENSE_SHORT ": " LICENSE_LONG " <" LICENSE_URL ">.\n" +"This is free software: you are free to change and redistribute it.\n" +"There is NO WARRANTY, to the extent permitted by law.\n" +"\n" +"Written by David Oberhollenzer.\n"; + +static const char *help_string = +"Usage: %s [OPTIONS] \n" +"\n" +" is a file containing newline separated entries that describe\n" +"the files to be included in the squashfs image:\n" +"\n" +"# a comment\n" +"file []\n" +"dir \n" +"nod \n" +"slink \n" +"pipe \n" +"sock \n" +"\n" +" Absolute path of the entry in the image.\n" +" If given, location of the input file. Either absolute or relative\n" +" to the description file. If omitted, the image path is used,\n" +" relative to the description file.\n" +" Symlink target.\n" +" Mode/permissions of the entry.\n" +" Numeric user id.\n" +" Numeric group id.\n" +" Device type (b=block, c=character).\n" +" Major number of a device special file.\n" +" Minor number of a device special file.\n" +"\n" +"Example:\n" +"# A simple squashfs image\n" +"dir /dev 0755 0 0\n" +"nod /dev/console 0600 0 0 c 5 1\n" +"dir /root 0700 0 0\n" +"dir /sbin 0755 0 0\n" +"\n" +"# Add a file. Input is relative to this listing.\n" +"file /sbin/init 0755 0 0 ../init/sbin/init\n" +"\n" +"# Read from ./bin/bash. /bin is created implicitly with default attributes.\n" +"file /bin/bash 0755 0 0" +"\n" +"Possible options:\n" +"\n" +" --compressor, -c Select the compressor to use.\n" +" directories (defaults to 'xz').\n" +" --block-size, -b Block size to use for Squashfs image.\n" +" Defaults to %u.\n" +" --dev-block-size, -B Device block size to padd the image to.\n" +" Defaults to %u.\n" +" --defaults, -d A comma seperated list of default values for\n" +" implicitly created directories.\n" +"\n" +" Possible options:\n" +" uid= 0 if not set.\n" +" gid= 0 if not set.\n" +" mode= 0755 if not set.\n" +" mtime= 0 if not set.\n" +"\n" +" --force, -f Overwrite the output file if it exists.\n" +" --help, -h Print help text and exit.\n" +" --version, -V Print version information and exit.\n" +"\n"; + +static const char *compressors[] = { + [SQFS_COMP_GZIP] = "gzip", + [SQFS_COMP_LZMA] = "lzma", + [SQFS_COMP_LZO] = "lzo", + [SQFS_COMP_XZ] = "xz", + [SQFS_COMP_LZ4] = "lz4", + [SQFS_COMP_ZSTD] = "zstd", +}; + +static long read_number(const char *name, const char *str, long min, long max) +{ + long base = 10, result = 0; + int x; + + if (str[0] == '0') { + if (str[1] == 'x' || str[1] == 'X') { + base = 16; + str += 2; + } else { + base = 8; + } + } + + if (!isxdigit(*str)) + goto fail_num; + + while (isxdigit(*str)) { + x = *(str++); + + if (isupper(x)) { + x = x - 'A' + 10; + } else if (islower(x)) { + x = x - 'a' + 10; + } else { + x -= '0'; + } + + if (x >= base) + goto fail_num; + + if (result > (LONG_MAX - x) / base) + goto fail_ov; + + result = result * base + x; + } + + if (result < min) + goto fail_uf; + + if (result > max) + goto fail_ov; + + return result; +fail_num: + fprintf(stderr, "%s: expected numeric value > 0\n", name); + goto fail; +fail_uf: + fprintf(stderr, "%s: number to small\n", name); + goto fail; +fail_ov: + fprintf(stderr, "%s: number to large\n", name); + goto fail; +fail: + exit(EXIT_FAILURE); +} + +static void process_defaults(options_t *opt, char *subopts) +{ + char *value; + int i; + + while (*subopts != '\0') { + i = getsubopt(&subopts, (char *const *)defaults, &value); + + if (value == NULL) { + fprintf(stderr, "Missing value for option %s\n", + defaults[i]); + exit(EXIT_FAILURE); + } + + switch (i) { + case DEF_UID: + opt->def_uid = read_number("Default user ID", value, + 0, 0xFFFFFFFF); + break; + case DEF_GID: + opt->def_gid = read_number("Default group ID", value, + 0, 0xFFFFFFFF); + break; + case DEF_MODE: + opt->def_mode = read_number("Default permissions", + value, 0, 0xFFFFFFFF); + break; + case DEF_MTIME: + opt->def_mtime = read_number("Default mtime", value, + 0, 0xFFFFFFFF); + break; + default: + fprintf(stderr, "Unknown option '%s'\n", value); + exit(EXIT_FAILURE); + } + } +} + +void process_command_line(options_t *opt, int argc, char **argv) +{ + int i; + + opt->def_uid = 0; + opt->def_gid = 0; + opt->def_mode = 0755; + opt->def_mtime = 0; + opt->outmode = O_WRONLY | O_CREAT | O_EXCL; + opt->compressor = SQFS_COMP_XZ; + opt->blksz = SQFS_DEFAULT_BLOCK_SIZE; + opt->devblksz = SQFS_DEVBLK_SIZE; + opt->infile = NULL; + opt->outfile = NULL; + + for (;;) { + i = getopt_long(argc, argv, short_opts, long_opts, NULL); + if (i == -1) + break; + + switch (i) { + case 'c': + for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) { + if (strcmp(compressors[i], optarg) == 0) { + opt->compressor = i; + break; + } + } + break; + case 'b': + opt->blksz = read_number("Block size", optarg, + 1024, 0xFFFFFFFF); + break; + case 'B': + opt->devblksz = read_number("Device block size", optarg, + 4096, 0xFFFFFFFF); + break; + case 'd': + process_defaults(opt, optarg); + break; + case 'f': + opt->outmode = O_WRONLY | O_CREAT | O_TRUNC; + break; + case 'h': + printf(help_string, __progname, + SQFS_DEFAULT_BLOCK_SIZE, SQFS_DEVBLK_SIZE); + + fputs("Available compressors:\n", stdout); + + for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) + printf("\t%s\n", compressors[i]); + + exit(EXIT_SUCCESS); + case 'V': + printf(version_string, __progname, + PACKAGE_NAME, PACKAGE_VERSION); + exit(EXIT_SUCCESS); + default: + goto fail_arg; + } + } + + if ((optind + 1) >= argc) { + fputs("Missing arguments: input and output files.\n", stderr); + goto fail_arg; + } + + opt->infile = argv[optind++]; + opt->outfile = argv[optind++]; + return; +fail_arg: + fprintf(stderr, "Try `%s --help' for more information.\n", __progname); + exit(EXIT_FAILURE); +} diff --git a/mkfs/options.h b/mkfs/options.h new file mode 100644 index 0000000..dc11250 --- /dev/null +++ b/mkfs/options.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#ifndef OPTIONS_H +#define OPTIONS_H + +typedef struct { + unsigned int def_uid; + unsigned int def_gid; + unsigned int def_mode; + unsigned int def_mtime; + int outmode; + int compressor; + int blksz; + int devblksz; + const char *infile; + const char *outfile; +} options_t; + +void process_command_line(options_t *opt, int argc, char **argv); + +#endif /* OPTIONS_H */ -- cgit v1.2.3