Many older pages use a handle_error() macro to do simple
error handling from system and library function calls.
Switch these pages to do similar.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Rework the text that refers to sched_setscheduler(2) for
a description of the permissions required to change
the scheduling policy and priority.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Michael Kerrisk