1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1986 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate /* from UCB 4.1 83/05/30 */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate #include <sys/time.h>
31*0Sstevel@tonic-gate #include <sys/resource.h>
32*0Sstevel@tonic-gate #include <errno.h>
33*0Sstevel@tonic-gate
34*0Sstevel@tonic-gate /*
35*0Sstevel@tonic-gate * Backwards compatible nice.
36*0Sstevel@tonic-gate */
37*0Sstevel@tonic-gate int
nice(incr)38*0Sstevel@tonic-gate nice(incr)
39*0Sstevel@tonic-gate int incr;
40*0Sstevel@tonic-gate {
41*0Sstevel@tonic-gate register int prio;
42*0Sstevel@tonic-gate int serrno;
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate /* put in brain-damaged upper range checking */
45*0Sstevel@tonic-gate if ((incr > 40) && (geteuid() != 0)) {
46*0Sstevel@tonic-gate errno = EPERM;
47*0Sstevel@tonic-gate return (-1);
48*0Sstevel@tonic-gate }
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate serrno = errno;
51*0Sstevel@tonic-gate errno = 0;
52*0Sstevel@tonic-gate prio = getpriority(PRIO_PROCESS, 0);
53*0Sstevel@tonic-gate if (prio == -1 && errno)
54*0Sstevel@tonic-gate return (-1);
55*0Sstevel@tonic-gate prio += incr;
56*0Sstevel@tonic-gate if (prio < -20)
57*0Sstevel@tonic-gate prio = -20;
58*0Sstevel@tonic-gate else if (prio > 19)
59*0Sstevel@tonic-gate prio = 19;
60*0Sstevel@tonic-gate if (setpriority(PRIO_PROCESS, 0, prio) == -1) {
61*0Sstevel@tonic-gate /*
62*0Sstevel@tonic-gate * 4.3BSD stupidly returns EACCES on an attempt by a
63*0Sstevel@tonic-gate * non-super-user process to lower a priority; map
64*0Sstevel@tonic-gate * it to EPERM.
65*0Sstevel@tonic-gate */
66*0Sstevel@tonic-gate if (errno == EACCES)
67*0Sstevel@tonic-gate errno = EPERM;
68*0Sstevel@tonic-gate return (-1);
69*0Sstevel@tonic-gate }
70*0Sstevel@tonic-gate errno = serrno;
71*0Sstevel@tonic-gate return (prio);
72*0Sstevel@tonic-gate }
73