Greg Wooledge <wool...@eeg.ccf.org> writes: > On Tue, Apr 21, 2020 at 08:38:41PM -0400, Dale R. Worley wrote: >> The "unbuffered pipe" symbol ">|>" causes Bash to set in the >> environment of the "grep" process a variable "STDOUT_UNBUFFERED" with >> a value that contains the dev and ino values for the pipe which the >> "grep" process sees as fd 1. > > Which libc implements this?
None does yet, obviously. That's why I provided a patch for it. >> References >> >> 14 Sep 1999 >> https://marc.info/?l=glibc-bug&m=98313957306295&w=4 >> "[REMINDER] stdio buffer flushing control environment variable" > > The next message in the thread is from Ulrich Drepper, saying: > > I will not implement this since it's completely up to the application > to do this. One knows in advance when this is necessary. If there is > a problem with the current code to select when line-buffering is used > (we use as everybody else isatty) then one can talk about this. I > think it is correct, though. That's true, but I don't hink he's looking at it properly. It was also from 20 years ago. Dale
