/**************************************************************************** * libs/libc/unistd/lib_getpriority.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: getpriority * * Description: * The getpriority() function shall obtain the nice value of a process, * process group, or user. * * Input Parameters: * which - PRIO_PROCESS, PRIO_PGRP, or PRIO_USER, ignored in current * implementation. * who - Process id is interpreted relative to "which" * * Returned Value: * Upon successful completion, getpriority() shall return an integer in * the range -{NZERO} to {NZERO}-1. Otherwise, -1 shall be returned and * errno set to indicate the error. * * Assumptions: * ****************************************************************************/ int getpriority(int which, id_t who) { struct sched_param param; int ret; if (who == 0) { who = getpid(); } ret = sched_getparam(who, ¶m); if (ret < 0) { return ret; } return param.sched_priority; }