Hi Clemens!

[..]
 CA> as far as os/2 is concerned and afaik you can only access whole files.
 
 DosSetFileLocks allows a process to lock and unlock a range in a file. The
time during which a file range is locked should be short. 

...
 
 Some file system drivers (FSDs) may not support atomic lock operations.
Versions of the operating system prior to OS/2* Version 2.00 do not support
atomic lock operations. 

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cu/2 |atrick

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