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GPL v3 - Does freely distributed software that includes GPL licensed code also require sharing source?


How does one combine differently licensed code in one open source program?Using GPL code in an application that is offered to a single client as source codeWhen changing the format of a work licensed under CC BY-ND, may I change the number of files?Re-assigning copyright on GPL licensed software - does the assigner still have a copy?Open Source projects with encryption keysWhat does “distribute with full source code” mean in GPL?Can I put a copyright on my website and make the code private when the source code is partially copied from an open source GNU GPL V3 projectEmbedding GPL code in proprietary softwareHow to update GPL licensed software distributed to a customer without providing the source code on each update?Does “the GPL doesn't cover the ouput of a program” also apply if the output is source code?













1















The Arkansas Division of Land Surveys shares all of their documents as pdfs with password protection, and they have a little viewer app that has the password built in:



https://surveyor.arkansas.gov/plat-viewer/



The viewer is based on Sumatra PDF, a GPL v3 open source pdf viewer. Does the Division of Land Surveys also have to share the source code that they modified to create their viewer?










share|improve this question







New contributor




user15741 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
























    1















    The Arkansas Division of Land Surveys shares all of their documents as pdfs with password protection, and they have a little viewer app that has the password built in:



    https://surveyor.arkansas.gov/plat-viewer/



    The viewer is based on Sumatra PDF, a GPL v3 open source pdf viewer. Does the Division of Land Surveys also have to share the source code that they modified to create their viewer?










    share|improve this question







    New contributor




    user15741 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      1












      1








      1








      The Arkansas Division of Land Surveys shares all of their documents as pdfs with password protection, and they have a little viewer app that has the password built in:



      https://surveyor.arkansas.gov/plat-viewer/



      The viewer is based on Sumatra PDF, a GPL v3 open source pdf viewer. Does the Division of Land Surveys also have to share the source code that they modified to create their viewer?










      share|improve this question







      New contributor




      user15741 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      The Arkansas Division of Land Surveys shares all of their documents as pdfs with password protection, and they have a little viewer app that has the password built in:



      https://surveyor.arkansas.gov/plat-viewer/



      The viewer is based on Sumatra PDF, a GPL v3 open source pdf viewer. Does the Division of Land Surveys also have to share the source code that they modified to create their viewer?







      gpl-3 distribution source-code






      share|improve this question







      New contributor




      user15741 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      user15741 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question






      New contributor




      user15741 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked 6 hours ago









      user15741user15741

      1083




      1083




      New contributor




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      New contributor





      user15741 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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          1 Answer
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          active

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          3














          As the plat viewer is based upon a GPL licensed project, clause 6 of the GPL license requires that the source code must be made available:




          1. 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:



          [...]



          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.




          In short, if the program can be downloaded over the internet, the same must be provided for the source code.



          As long as the source code is not available, the plat viewer is in violation of the GPL license. The only people/organizations that can take legal action on this are the copyright holders of SumatraPDF that is used as basis for the plat viewer.






          share|improve this answer






















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            1 Answer
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            active

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            active

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            active

            oldest

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            3














            As the plat viewer is based upon a GPL licensed project, clause 6 of the GPL license requires that the source code must be made available:




            1. 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:



            [...]



            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.




            In short, if the program can be downloaded over the internet, the same must be provided for the source code.



            As long as the source code is not available, the plat viewer is in violation of the GPL license. The only people/organizations that can take legal action on this are the copyright holders of SumatraPDF that is used as basis for the plat viewer.






            share|improve this answer



























              3














              As the plat viewer is based upon a GPL licensed project, clause 6 of the GPL license requires that the source code must be made available:




              1. 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:



              [...]



              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.




              In short, if the program can be downloaded over the internet, the same must be provided for the source code.



              As long as the source code is not available, the plat viewer is in violation of the GPL license. The only people/organizations that can take legal action on this are the copyright holders of SumatraPDF that is used as basis for the plat viewer.






              share|improve this answer

























                3












                3








                3







                As the plat viewer is based upon a GPL licensed project, clause 6 of the GPL license requires that the source code must be made available:




                1. 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:



                [...]



                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.




                In short, if the program can be downloaded over the internet, the same must be provided for the source code.



                As long as the source code is not available, the plat viewer is in violation of the GPL license. The only people/organizations that can take legal action on this are the copyright holders of SumatraPDF that is used as basis for the plat viewer.






                share|improve this answer













                As the plat viewer is based upon a GPL licensed project, clause 6 of the GPL license requires that the source code must be made available:




                1. 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:



                [...]



                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.




                In short, if the program can be downloaded over the internet, the same must be provided for the source code.



                As long as the source code is not available, the plat viewer is in violation of the GPL license. The only people/organizations that can take legal action on this are the copyright holders of SumatraPDF that is used as basis for the plat viewer.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 4 hours ago









                Bart van Ingen SchenauBart van Ingen Schenau

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