1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 #include "synonyms.h" 43 44 #include <string.h> 45 #include <sys/types.h> 46 #include <sys/time.h> 47 #include <sys/resource.h> 48 #include <sys/procset.h> 49 #include <sys/priocntl.h> 50 #include <errno.h> 51 52 static idtype_t 53 prio_to_idtype(int which) 54 { 55 switch (which) { 56 57 case PRIO_PROCESS: 58 return (P_PID); 59 60 case PRIO_PGRP: 61 return (P_PGID); 62 63 case PRIO_USER: 64 return (P_UID); 65 66 case PRIO_GROUP: 67 return (P_GID); 68 69 case PRIO_SESSION: 70 return (P_SID); 71 72 case PRIO_LWP: 73 return (P_LWPID); 74 75 case PRIO_TASK: 76 return (P_TASKID); 77 78 case PRIO_PROJECT: 79 return (P_PROJID); 80 81 case PRIO_ZONE: 82 return (P_ZONEID); 83 84 case PRIO_CONTRACT: 85 return (P_CTID); 86 87 default: 88 return (-1); 89 } 90 } 91 92 static int 93 old_idtype(int which) 94 { 95 switch (which) { 96 case PRIO_PROCESS: 97 case PRIO_PGRP: 98 case PRIO_USER: 99 return (1); 100 default: 101 return (0); 102 } 103 } 104 105 int 106 getpriority(int which, id_t who) 107 { 108 id_t id; 109 idtype_t idtype; 110 pcnice_t pcnice; 111 112 if ((idtype = prio_to_idtype(which)) == -1) { 113 errno = EINVAL; 114 return (-1); 115 } 116 117 if (who < 0) { 118 if (old_idtype(which)) { 119 errno = EINVAL; 120 return (-1); 121 } else if (who != P_MYID) { 122 errno = EINVAL; 123 return (-1); 124 } 125 } 126 127 /* 128 * The POSIX standard requires that a 0 value for the who argument 129 * should specify the current process, process group, or user. 130 * For all other id types we can treat zero as normal id value. 131 */ 132 if (who == 0 && old_idtype(which)) 133 id = P_MYID; 134 else 135 id = who; 136 137 pcnice.pc_val = 0; 138 pcnice.pc_op = PC_GETNICE; 139 140 if (priocntl(idtype, id, PC_DONICE, (caddr_t)&pcnice) == -1) 141 return (-1); 142 else 143 return (pcnice.pc_val); 144 } 145 146 int 147 setpriority(int which, id_t who, int prio) 148 { 149 id_t id; 150 idtype_t idtype; 151 pcnice_t pcnice; 152 153 if ((idtype = prio_to_idtype(which)) == -1) { 154 errno = EINVAL; 155 return (-1); 156 } 157 158 if (who < 0) { 159 if (old_idtype(which)) { 160 errno = EINVAL; 161 return (-1); 162 } else if (who != P_MYID) { 163 errno = EINVAL; 164 return (-1); 165 } 166 } 167 168 if (who == 0 && old_idtype(which)) 169 id = P_MYID; 170 else 171 id = who; 172 173 if (prio > 19) 174 prio = 19; 175 else if (prio < -20) 176 prio = -20; 177 178 pcnice.pc_val = prio; 179 pcnice.pc_op = PC_SETNICE; 180 181 return (priocntl(idtype, id, PC_DONICE, (caddr_t)&pcnice)); 182 } 183