Annotation of prex-old/usr/lib/posix/process/setpriority.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: /*
40: * setpriority - set priority for process or process group.
41: *
42: * Note: support only for current process.
43: */
44: int
45: setpriority(int which, int who, int prio)
46: {
47: int err, val;
48:
49: switch (which) {
50: case PRIO_PROCESS:
51: case PRIO_PGRP:
52: if (who != 0) {
53: errno = EPERM;
54: return -1;
55: }
56: break;
57: case PRIO_USER:
58: if (who != 1) {
59: errno = EPERM;
60: return -1;
61: }
62: break;
63: default:
64: errno = EINVAL;
65: return -1;
66: }
67:
68: if (prio < PRIO_MIN)
69: prio = PRIO_MIN;
70: if (prio > PRIO_MAX)
71: prio = PRIO_MAX;
72:
73: val = CONFIG_USER_PRIO + prio;
74:
75: err = thread_setprio(thread_self(), val);
76: if (err)
77: errno = err;
78: return -1;
79: }
CVSweb