#16099: expose st_blksize field from fstat syscall ----------------------------------------+--------------------------------- Reporter: flip101 | Owner: (none) Type: feature request | Status: new Priority: low | Milestone: Component: libraries/unix | Version: 8.6.3 Keywords: | Operating System: POSIX Architecture: Unknown/Multiple | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: ----------------------------------------+--------------------------------- The libc manual talks about buffer sizes. https://www.gnu.org/software/libc/manual/html_node/Controlling- Buffering.html They advise: Actually, you can get an even better value to use for the buffer size by means of the fstat system call: it is found in the st_blksize field of the file attributes. See Attribute Meanings. It's just that the st_blksize field it stepped over in the haskell definition of it: https://github.com/haskell/unix/blob/8d188ed8067af17dfcc2cd6cbbfda7294ba17e1... Which goes directly from filesize to accesstime See also https://linux.die.net/man/2/fstat Would be nice to expose the additional fields as well -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16099 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler