On 23/01/2026 19:00, Pádraig Brady wrote:
On 23/01/2026 18:40, Vincent Lefevre wrote:
The nproc output is affected by the OMP_NUM_THREADS and OMP_THREAD_LIMIT
environment variables (except with the --all option). This is completely
unintuitive:
* The short description of nproc ("print the number of processing
units available" / "Print the number of available processors")
does not even mention threading, for a good reason as it is not
necessarily related to multithreading:
* For instance, one may want to run several processes in parallel,
each being set to single-threaded by using OMP_NUM_THREADS=1.
So the --help text (which also corresponds to the nproc(1) man page)
should mention the the effect of these environment variables.
We do mention this in the full manual,
but yes I agree we should add it to the summary --help and man page.
The existing text in the info manual is succinct enough,
so I'll use that.
Pushed this change at:
https://github.com/coreutils/coreutils/commit/1361ade5c
Marking this as done.
cheers,
Padraig
