Annotation of prex-old/usr/lib/posix/process/getpriority.c, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 2007, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #include <prex/prex.h>
31: #include <prex/posix.h>
32: #include <server/proc.h>
33: #include <sys/resource.h>
34:
35: #include <stddef.h>
36: #include <unistd.h>
37: #include <errno.h>
38:
39: int
40: getpriority(int which, int who)
41: {
42: int prio;
43:
44: switch (which) {
45: case PRIO_PROCESS:
46: case PRIO_PGRP:
47: if (who != 0) {
48: errno = EPERM;
49: return -1;
50: }
51: break;
52: case PRIO_USER:
53: if (who != 1) {
54: errno = EPERM;
55: return -1;
56: }
57: break;
58: default:
59: errno = EINVAL;
60: return -1;
61: }
62: thread_getprio(thread_self(), &prio);
63:
64: prio -= CONFIG_USER_PRIO;
65:
66: if (prio < PRIO_MIN)
67: prio = PRIO_MIN;
68: if (prio > PRIO_MAX)
69: prio = PRIO_MAX;
70:
71: return prio;
72: }
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