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=item setpriority WHICH,WHO,PRIORITY
X<setpriority> X<priority> X<nice> X<renice>

Sets the current priority for a process, a process group, or a user.
(See L<setpriority(2)>.)  Raises an exception when used on a machine
that doesn't implement L<setpriority(2)>.

C<WHICH> can be any of C<PRIO_PROCESS>, C<PRIO_PGRP> or C<PRIO_USER>
imported from L<POSIX/RESOURCE CONSTANTS>.

Portability issues: L<perlport/setpriority>.

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