NetBSD-5.0.2/usr.sbin/psrset/psrset.c
/* $NetBSD: psrset.c,v 1.1 2008/06/22 13:53:59 ad Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: psrset.c,v 1.1 2008/06/22 13:53:59 ad Exp $");
#endif
#include <sys/types.h>
#include <sys/pset.h>
#include <sys/sched.h>
#include <sys/sysctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <err.h>
#include <unistd.h>
#include <ctype.h>
static void usage(void);
static int eatopt(char **);
static int cmd_a(char **, int);
static int cmd_b(char **, int);
static int cmd_c(char **, int);
static int cmd_d(char **, int);
static int cmd_e(char **, int);
static int cmd_i(char **, int);
static int cmd_p(char **, int);
static int cmd_r(char **, int);
static int cmd_u(char **, int);
static int cmd__(char **, int);
static psetid_t psid;
static int ncpu;
static cpuset_t *cpuset;
int
main(int argc, char **argv)
{
int (*cmd)(char **, int);
int off;
ncpu = sysconf(_SC_NPROCESSORS_CONF);
cpuset = cpuset_create();
if (cpuset == NULL)
err(EXIT_FAILURE, "cpuset_create");
cpuset_zero(cpuset);
if (argc == 1 || argv[1][0] != '-') {
cmd = cmd_i;
off = 1;
} else if (strncmp(argv[1], "-a", 2) == 0) {
cmd = cmd_a;
off = eatopt(argv);
} else if (strncmp(argv[1], "-b", 2) == 0) {
cmd = cmd_b;
off = eatopt(argv);
} else if (strncmp(argv[1], "-c", 2) == 0) {
cmd = cmd_c;
off = eatopt(argv);
} else if (strncmp(argv[1], "-d", 2) == 0) {
cmd = cmd_d;
off = eatopt(argv);
} else if (strncmp(argv[1], "-e", 2) == 0) {
cmd = cmd_e;
off = eatopt(argv);
} else if (strncmp(argv[1], "-i", 2) == 0) {
cmd = cmd_i;
off = eatopt(argv);
} else if (strncmp(argv[1], "-p", 2) == 0) {
cmd = cmd_p;
off = eatopt(argv);
} else if (strncmp(argv[1], "-r", 2) == 0) {
cmd = cmd_r;
off = eatopt(argv);
} else if (strncmp(argv[1], "-u", 2) == 0) {
cmd = cmd_u;
off = eatopt(argv);
} else {
cmd = cmd__;
off = 0;
}
return (*cmd)(argv + off, argc - off);
}
static int
eatopt(char **argv)
{
if (argv[1][2] != '\0') {
argv[1] += 2;
return 1;
}
return 2;
}
static int
getint(char *p)
{
char *q;
int rv;
rv = (int)strtol(p, &q, 10);
if (q == p || *q != '\0')
usage();
return rv;
}
static void
usage(void)
{
fprintf(stderr, "usage:\n"
"\tpsrset [setid ...]\n"
"\tpsrset -a setid cpuid ...\n"
"\tpsrset -b setid pid ...\n"
"\tpsrset -c [cpuid ...]\n"
"\tpsrset -d setid\n"
"\tpsrset -e setid command\n"
"\tpsrset -i [setid ...]\n"
"\tpsrset -p\n"
"\tpsrset -r cpuid ...\n"
"\tpsrset -u pid ...\n");
exit(EXIT_FAILURE);
}
static void
makecpuset(char **argv)
{
char *p, *q;
int i, j;
if (*argv == NULL) {
for (i = 0; i < ncpu; i++)
cpuset_set(i, cpuset);
return;
}
for (; *argv != NULL; argv++) {
if (!isdigit((unsigned)**argv))
usage();
i = (int)strtol(*argv, &p, 10);
if ((*p != '\0' && *p != '-') || p == *argv)
usage();
if (*p == '-') {
if (!isdigit((unsigned)p[1]))
usage();
j = (int)strtol(p + 1, &q, 10);
if (q == p || *q != '\0')
usage();
} else {
j = i;
}
if ((unsigned int)i >= ncpu) {
errx(EXIT_FAILURE, "value out of range");
}
while (i <= j)
cpuset_set(i++, cpuset);
}
}
/*
* Assign processors to set.
*/
static int
cmd_a(char **argv, int argc)
{
int i;
if (argc < 2)
usage();
psid = getint(argv[0]);
makecpuset(argv + 1);
for (i = 0; i < ncpu; i++) {
if (!cpuset_isset(i, cpuset))
continue;
if (pset_assign(psid, i, NULL))
err(EXIT_FAILURE, "pset_assign");
}
return 0;
}
/*
* Bind LWPs within processes to set.
*/
static int
cmd_b(char **argv, int argc)
{
if (argc < 2)
usage();
psid = getint(*argv);
for (argv++; *argv != NULL; argv++) {
if (pset_bind(psid, P_PID, (idtype_t)getint(*argv), NULL))
err(EXIT_FAILURE, "pset_bind");
}
return 0;
}
/*
* Create set.
*/
static int
cmd_c(char **argv, int argc)
{
int i;
if (pset_create(&psid))
err(EXIT_FAILURE, "pset_create");
printf("%d\n", (int)psid);
if (argc != 0)
makecpuset(argv);
for (i = 0; i < ncpu; i++) {
if (!cpuset_isset(i, cpuset))
continue;
if (pset_assign(psid, i, NULL))
err(EXIT_FAILURE, "pset_assign");
}
return 0;
}
/*
* Destroy set.
*/
static int
cmd_d(char **argv, int argc)
{
if (argc != 1)
usage();
if (pset_destroy(getint(argv[0])))
err(EXIT_FAILURE, "pset_destroy");
return 0;
}
/*
* Execute command in set.
*/
static int
cmd_e(char **argv, int argc)
{
if (argc < 2)
usage();
if (pset_bind(getint(argv[0]), P_PID, getpid(), NULL))
err(EXIT_FAILURE, "pset_bind");
(void)execvp(argv[1], argv + 1);
return 1;
}
/*
* Print info about each set.
*/
static int
cmd_i(char **argv, int argc)
{
char buf[1024];
size_t len;
char *p, *q;
int i, j, k;
len = sizeof(buf);
if (sysctlbyname("kern.pset.list", buf, &len, NULL, 0) == -1)
err(EXIT_FAILURE, "kern.pset.list");
p = buf;
while ((q = strsep(&p, ",")) != NULL) {
i = (int)strtol(q, &q, 10);
if (*q != ':')
errx(EXIT_FAILURE, "bad kern.pset.list");
printf("%s processor set %d: ",
(atoi(q + 1) == 1 ? "system" : "user"), i);
for (j = 0, k = 0; j < ncpu; j++) {
if (pset_assign(PS_QUERY, j, &psid))
err(EXIT_FAILURE, "pset_assign");
if (psid == i) {
if (k++ == 0)
printf("processor(s)");
printf(" %d", j);
}
}
if (k == 0)
printf("empty");
putchar('\n');
}
return 0;
}
/*
* Print set ID for each processor.
*/
static int
cmd_p(char **argv, int argc)
{
int i;
makecpuset(argv);
for (i = 0; i < ncpu; i++) {
if (!cpuset_isset(i, cpuset))
continue;
if (pset_assign(PS_QUERY, i, &psid))
err(EXIT_FAILURE, "ioctl");
printf("processor %d: ", i);
if (psid == PS_NONE)
printf("not assigned\n");
else
printf("%d\n", (int)psid);
}
return 0;
}
/*
* Remove CPU from set and return to system.
*/
static int
cmd_r(char **argv, int argc)
{
int i;
makecpuset(argv);
for (i = 0; i < ncpu; i++) {
if (!cpuset_isset(i, cpuset))
continue;
if (pset_assign(PS_NONE, i, NULL))
err(EXIT_FAILURE, "ioctl");
}
return 0;
}
/*
* Unbind LWPs within process.
*/
static int
cmd_u(char **argv, int argc)
{
if (argc < 1)
usage();
for (; *argv != NULL; argv++) {
if (pset_bind(PS_NONE, P_PID, (idtype_t)getint(*argv), NULL))
err(EXIT_FAILURE, "pset_bind");
}
return 0;
}
/*
* Dummy.
*/
static int
cmd__(char **argv, int argc)
{
usage();
return 0;
}