I think Todd is right, and this doesn't need to change. Todd C. Miller <mill...@openbsd.org> wrote:
> On Sun, 12 Dec 2021 19:15:51 -0600, Scott Cheloha wrote: > > > cat(1) sizes its I/O buffer according to the st_blksize of the first > > file it processes. We don't do this very often in the tree. I'm not > > sure if we should trust st_blksize. > > It sizes the buffer based on st_blksize of stdout, not the input > file. Since st_blksize is the "optimal" blocksize for that device. > Since cat only has a single output, the output buffer only needs > to be sized once. > > > It would be simpler to just choose a value that works in practice and > > always use it. > > I prefer it the way it is now. By using st_blksize you get the > proper block size regardless of whether output is to a pipe, a file > or a tty. I didn't suggest this for tee since it supports multiple > output files. > > - todd >
