Date: Fri, 20 Mar 2020 20:10:02 +0530 From: Arpan Palit <babupalit@gmail.com> To: freebsd-hackers@freebsd.org, freebsd-questions@freebsd.org, freebsd-drivers@freebsd.org Subject: How to access a user space file from kernel space in FreeBSD. Message-ID: <CAF3txfi1mNcmQEFDfOx01AA2aWza1Fteb7fisC%2BtWVQccoV77Q@mail.gmail.com>
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Hi all, I am working on (kernel)driver ioctl implementation for file read/write, where I need to know what are API's which can expose to read,write and close user space file from kernel space. In general I need to know the answer for the below questions. i). How to open a user space file from driver(kernel space) ? ii). How to create a new user space file from driver(kernel space) ? iii). How to get file parameters like size of the file ? iv). How to read/write the files from the driver(kernel space) ? Thanks & Regards, Arpan Palit
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