🚀 go-pugleaf

rbp@investor.pgh.pa.us (Bob Peirce #305) writes:
> Also, at the risk of finding out the NeXT can do this, no Unix I have
> seen can shrink a file.  You can truncate them to zero, but as
> desirable as it would be, you can't seem to free part of a file.  On the
> surface this would seem to be a simple thing to do so maybe somebody
> does it, but I haven't seen it.

     ftruncate(fd, length)
     int fd, length;

   Description
     The truncate system call causes the file named by path or referenced by
     fd to be truncated to, at most, length bytes in size.  If the file pre-
     viously was larger than this size, the extra data is lost.  With ftrun-
     cate, the file must be open for writing.


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