boost::filesystem and writing to Windows programdata structure
Hi, I've an application that has been working fine under Windows 7, but I'm now fixing up for running on later Windows versions. I've been hitting unhandled exceptions when writing to c:\programdata\(my company)\(my app name)\ and understand that this is due to the permissions for such folders being more restrictive on Windows 8, 8.1 and 10. My research seems to indicate that I can modify my installer to set up my folders with appropriate permissions at install-time, but I'd prefer to use boost::filesystem to check folder/file permissions then change them at run-time, if necessary using appropriate csidl values. Can anybody offer any advice, please? Best wishes. Tim Burgess
If the application doesn't have write permission for a folder at run-time, why do you expect that it has the permission to change the permission on the folder? (Modifying the DACL of an object is also a separate permission.) ________________________________ From: Boost-users <boost-users-bounces@lists.boost.org> on behalf of Tim Burgess via Boost-users <boost-users@lists.boost.org> Sent: Thursday, October 12, 2017 11:14:26 AM To: 'boost-users list' Cc: Tim Burgess Subject: [Boost-users] boost::filesystem and writing to Windows programdata structure Hi, I’ve an application that has been working fine under Windows 7, but I’m now fixing up for running on later Windows versions. I’ve been hitting unhandled exceptions when writing to c:\programdata\(my company)\(my app name)\ and understand that this is due to the permissions for such folders being more restrictive on Windows 8, 8.1 and 10. My research seems to indicate that I can modify my installer to set up my folders with appropriate permissions at install-time, but I’d prefer to use boost::filesystem to check folder/file permissions then change them at run-time, if necessary using appropriate csidl values. Can anybody offer any advice, please? Best wishes. Tim Burgess
On 12.10.2017 11:20, Stian Zeljko Vrba via Boost-users wrote:
If the application doesn't have write permission for a folder at run-time, why do you expect that it has the permission to change the permission on the folder? (Modifying the DACL of an object is also a separate permission.)
It kinda could have, I suppose, still automatically changing permissions on folder to facilitate requested write/create/modify would go very much against my expectations. As for the original question, creating appropriate folder structure with installer would imo be a proper way to go. Cheers, Leon
------------------------------------------------------------------------ *From:* Boost-users <boost-users-bounces@lists.boost.org> on behalf of Tim Burgess via Boost-users <boost-users@lists.boost.org> *Sent:* Thursday, October 12, 2017 11:14:26 AM *To:* 'boost-users list' *Cc:* Tim Burgess *Subject:* [Boost-users] boost::filesystem and writing to Windows programdata structure
Hi,
I’ve an application that has been working fine under Windows 7, but I’m now fixing up for running on later Windows versions. I’ve been hitting unhandled exceptions when writing to c:\programdata\(my company)\(my app name)\ and understand that this is due to the permissions for such folders being more restrictive on Windows 8, 8.1 and 10.
My research seems to indicate that I can modify my installer to set up my folders with appropriate permissions at install-time, but I’d prefer to use boost::filesystem to check folder/file permissions then change them at run-time, if necessary using appropriate csidl values.
Can anybody offer any advice, please?
Best wishes.
Tim Burgess
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org https://lists.boost.org/mailman/listinfo.cgi/boost-users
Leon, Thanks for the comments. It's been a useful learning experience anyway - I'm a good deal wiser and only a little older and that's always a winner:) Best wishes. Tim Burgess From: Boost-users [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Leon Mlakar via Boost-users Sent: 12 October 2017 12:51 To: Stian Zeljko Vrba via Boost-users <boost-users@lists.boost.org> Cc: Leon Mlakar <leon@digiverse.si> Subject: Re: [Boost-users] boost::filesystem and writing to Windows programdata structure On 12.10.2017 11:20, Stian Zeljko Vrba via Boost-users wrote: If the application doesn't have write permission for a folder at run-time, why do you expect that it has the permission to change the permission on the folder? (Modifying the DACL of an object is also a separate permission.) It kinda could have, I suppose, still automatically changing permissions on folder to facilitate requested write/create/modify would go very much against my expectations. As for the original question, creating appropriate folder structure with installer would imo be a proper way to go. Cheers, Leon _____ From: Boost-users <mailto:boost-users-bounces@lists.boost.org> <boost-users-bounces@lists.boost.org> on behalf of Tim Burgess via Boost-users <mailto:boost-users@lists.boost.org> <boost-users@lists.boost.org> Sent: Thursday, October 12, 2017 11:14:26 AM To: 'boost-users list' Cc: Tim Burgess Subject: [Boost-users] boost::filesystem and writing to Windows programdata structure Hi, I've an application that has been working fine under Windows 7, but I'm now fixing up for running on later Windows versions. I've been hitting unhandled exceptions when writing to c:\programdata\(my company)\(my app name)\ and understand that this is due to the permissions for such folders being more restrictive on Windows 8, 8.1 and 10. My research seems to indicate that I can modify my installer to set up my folders with appropriate permissions at install-time, but I'd prefer to use boost::filesystem to check folder/file permissions then change them at run-time, if necessary using appropriate csidl values. Can anybody offer any advice, please? Best wishes. Tim Burgess _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org <mailto:Boost-users@lists.boost.org> https://lists.boost.org/mailman/listinfo.cgi/boost-users
My research seems to indicate that I can modify my installer to set up my folders with appropriate permissions at install-time, but I’d prefer to use boost::filesystem to check folder/file permissions then change them at run-time, if necessary using appropriate csidl values.
Filesystem only supports the POSIX access permissions model when running on POSIX. It does not support ACLs, nor permissions at all on Windows. Niall -- ned Productions Limited Consulting http://www.nedproductions.biz/ http://ie.linkedin.com/in/nialldouglas/
Niall, OK, that is the final nail in the app-based fix idea. Thanks for the information. Best wishes. Tim Burgess -----Original Message----- From: Boost-users [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Niall Douglas via Boost-users Sent: 12 October 2017 13:25 To: boost-users@lists.boost.org Cc: Niall Douglas <s_sourceforge@nedprod.com> Subject: Re: [Boost-users] boost::filesystem and writing to Windows programdata structure
My research seems to indicate that I can modify my installer to set up my folders with appropriate permissions at install-time, but I’d prefer to use boost::filesystem to check folder/file permissions then change them at run-time, if necessary using appropriate csidl values.
Filesystem only supports the POSIX access permissions model when running on POSIX. It does not support ACLs, nor permissions at all on Windows. Niall -- ned Productions Limited Consulting http://www.nedproductions.biz/ http://ie.linkedin.com/in/nialldouglas/ _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org https://lists.boost.org/mailman/listinfo.cgi/boost-users
participants (2)
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Leon Mlakar -
Niall Douglas -
Stian Zeljko Vrba -
Tim Burgess