Subj : massive confusion on file locks
To   : candycane
From : Digital Man
Date : Thu Aug 10 2023 09:30 am

  Re: massive confusion on file locks
  By: candycane to All on Thu Aug 10 2023 12:01 pm

 > Hi!
 > Does anyone have any good recourses to learning how to make file locks in c?

File locks aren't really a "c" thing, but there is a POSIX standard and then there's the detailed differences in implementation on *BSD versus Linux versus Windows. For an example cross-platform abstraction/wrapper of different file and recording locking methods in C, see https://gitlab.synchro.net/main/sbbs/-/blob/master/src/xpdev/filewrap.c

 > I've been trying to research it but there's not many recourses out there
 > weirdly. I'm also very confused on the difference between flock(2) and fcntl
 > locks.

If you want to lock an *entire* file, use flock(). If you want to lock just a *region* of a file, use fcntl().
-- 
                                            digital man (rob)

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