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freebsd-dev/usr.sbin/sysctl/sysctl.c

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/*
* Copyright (c) 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "From: @(#)sysctl.c 8.1 (Berkeley) 6/6/93"; */
static const char rcsid[] =
"$Id: sysctl.c,v 1.7 1995/06/11 19:32:58 rgrimes Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/gmon.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <vm/vm_param.h>
#include <machine/cpu.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp_var.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/igmp_var.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct ctlname topname[] = CTL_NAMES;
struct ctlname kernname[] = CTL_KERN_NAMES;
struct ctlname vmname[] = CTL_VM_NAMES;
struct ctlname netname[] = CTL_NET_NAMES;
struct ctlname hwname[] = CTL_HW_NAMES;
struct ctlname username[] = CTL_USER_NAMES;
#ifdef CTL_MACHDEP_NAMES
struct ctlname machdepname[] = CTL_MACHDEP_NAMES;
#endif
char names[BUFSIZ];
struct list {
struct ctlname *list;
int size;
};
struct list toplist = { topname, CTL_MAXID };
struct list secondlevel[] = {
{ 0, 0 }, /* CTL_UNSPEC */
{ kernname, KERN_MAXID }, /* CTL_KERN */
{ vmname, VM_MAXID }, /* CTL_VM */
{ 0, 0 }, /* CTL_FS */
{ netname, NET_MAXID }, /* CTL_NET */
{ 0, 0 }, /* CTL_DEBUG */
{ hwname, HW_MAXID }, /* CTL_HW */
#ifdef CTL_MACHDEP_NAMES
{ machdepname, CPU_MAXID }, /* CTL_MACHDEP */
#else
{ 0, 0 }, /* CTL_MACHDEP */
#endif
{ username, USER_MAXID }, /* CTL_USER_NAMES */
};
int Aflag, aflag, nflag, wflag;
/*
* Variables requiring special processing.
*/
#define CLOCK 0x00000001
#define BOOTTIME 0x00000002
#define CONSDEV 0x00000004
#define DUMPDEV 0x00000008
int
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
int ch, lvl1;
while ((ch = getopt(argc, argv, "Aanw")) != EOF) {
switch (ch) {
case 'A':
Aflag = 1;
break;
case 'a':
aflag = 1;
break;
case 'n':
nflag = 1;
break;
case 'w':
wflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (Aflag || aflag) {
for (lvl1 = 1; lvl1 < CTL_MAXID; lvl1++)
listall(topname[lvl1].ctl_name, &secondlevel[lvl1]);
exit(0);
}
if (argc == 0)
usage();
while (argc-- > 0)
parse(*argv, 1);
exit(0);
}
/*
* List all variables known to the system.
*/
listall(prefix, lp)
char *prefix;
struct list *lp;
{
int lvl2;
char *cp, name[BUFSIZ];
if (lp->list == 0)
return;
strcpy(name, prefix);
cp = &name[strlen(name)];
*cp++ = '.';
for (lvl2 = 0; lvl2 < lp->size; lvl2++) {
if (lp->list[lvl2].ctl_name == 0)
continue;
strcpy(cp, lp->list[lvl2].ctl_name);
parse(name, Aflag);
}
}
/*
* Parse a name into a MIB entry.
* Lookup and print out the MIB entry if it exists.
* Set a new value if requested.
*/
parse(string, flags)
char *string;
int flags;
{
int indx, type, state, size, len;
int special = 0;
void *newval = 0;
int intval, newsize = 0;
quad_t quadval;
struct list *lp;
int mib[CTL_MAXNAME];
char *cp, *bufp, buf[BUFSIZ], strval[BUFSIZ];
bufp = buf;
snprintf(buf, BUFSIZ, "%s", string);
if ((cp = strchr(string, '=')) != NULL) {
if (!wflag) {
fprintf(stderr, "Must specify -w to set variables\n");
exit(2);
}
*strchr(buf, '=') = '\0';
*cp++ = '\0';
while (isspace(*cp))
cp++;
newval = cp;
newsize = strlen(cp);
}
if ((indx = findname(string, "top", &bufp, &toplist)) == -1)
return;
mib[0] = indx;
lp = &secondlevel[indx];
if (lp->list == 0) {
fprintf(stderr, "%s: class is not implemented\n",
topname[indx]);
return;
}
if (bufp == NULL) {
listall(topname[indx].ctl_name, lp);
return;
}
if ((indx = findname(string, "second", &bufp, lp)) == -1)
return;
mib[1] = indx;
type = lp->list[indx].ctl_type;
len = 2;
switch (mib[0]) {
case CTL_KERN:
switch (mib[1]) {
case KERN_PROF:
mib[2] = GPROF_STATE;
size = sizeof state;
if (sysctl(mib, 3, &state, &size, NULL, 0) < 0) {
if (flags == 0)
return;
if (!nflag)
fprintf(stdout, "%s: ", string);
fprintf(stderr,
"kernel is not compiled for profiling\n");
return;
}
if (!nflag)
fprintf(stdout, "%s: %s\n", string,
state == GMON_PROF_OFF ? "off" : "running");
return;
case KERN_VNODE:
case KERN_FILE:
if (flags == 0)
return;
fprintf(stderr,
"Use pstat to view %s information\n", string);
return;
case KERN_PROC:
if (flags == 0)
return;
fprintf(stderr,
"Use ps to view %s information\n", string);
return;
case KERN_CLOCKRATE:
special |= CLOCK;
break;
case KERN_BOOTTIME:
special |= BOOTTIME;
break;
case KERN_DUMPDEV:
special |= DUMPDEV;
break;
}
break;
case CTL_HW:
break;
case CTL_VM:
if (mib[1] == VM_LOADAVG) {
double loads[3];
getloadavg(loads, 3);
if (!nflag)
fprintf(stdout, "%s: ", string);
fprintf(stdout, "%.2f %.2f %.2f\n",
loads[0], loads[1], loads[2]);
return;
}
if (flags == 0)
return;
fprintf(stderr,
"Use vmstat or systat to view %s information\n", string);
return;
case CTL_NET:
if (mib[1] == PF_INET) {
len = sysctl_inet(string, &bufp, mib, flags, &type,
&special);
if (len >= 0)
break;
return;
}
if (flags == 0)
return;
fprintf(stderr, "Use netstat to view %s information\n", string);
return;
case CTL_MACHDEP:
#ifdef CPU_CONSDEV
if (mib[1] == CPU_CONSDEV)
special |= CONSDEV;
#endif
break;
case CTL_FS:
case CTL_USER:
break;
default:
fprintf(stderr, "Illegal top level value: %d\n", mib[0]);
return;
}
if (bufp) {
fprintf(stderr, "name %s in %s is unknown\n", bufp, string);
return;
}
if (newsize > 0) {
switch (type) {
case CTLTYPE_INT:
intval = atoi(newval);
newval = &intval;
newsize = sizeof intval;
break;
case CTLTYPE_QUAD:
sscanf(newval, "%qd", &quadval);
newval = &quadval;
newsize = sizeof quadval;
break;
}
}
size = BUFSIZ;
if (sysctl(mib, len, buf, &size, newsize ? newval : 0, newsize) == -1) {
if (flags == 0)
return;
switch (errno) {
case EOPNOTSUPP:
fprintf(stderr, "%s: value is not available\n", string);
return;
case ENOTDIR:
fprintf(stderr, "%s: specification is incomplete\n",
string);
return;
case ENOMEM:
fprintf(stderr, "%s: type is unknown to this program\n",
string);
return;
default:
perror(string);
return;
}
}
if (special & CLOCK) {
struct clockinfo *clkp = (struct clockinfo *)buf;
if (!nflag)
fprintf(stdout, "%s: ", string);
fprintf(stdout,
"hz = %d, tick = %d, profhz = %d, stathz = %d\n",
clkp->hz, clkp->tick, clkp->profhz, clkp->stathz);
return;
}
if (special & BOOTTIME) {
struct timeval *btp = (struct timeval *)buf;
if (!nflag)
fprintf(stdout, "%s = %s", string,
ctime(&btp->tv_sec));
else
fprintf(stdout, "%d\n", btp->tv_sec);
return;
}
if (special & (CONSDEV | DUMPDEV)) {
dev_t dev = *(dev_t *)buf;
if ((special & DUMPDEV) && dev == NODEV && !nflag) {
printf("%s = disabled\n", string);
return;
}
if (!nflag)
fprintf(stdout, "%s = %s\n", string,
devname(dev,
(special & CONSDEV) ? S_IFCHR : S_IFBLK));
else
fprintf(stdout, "0x%x\n", dev);
return;
}
switch (type) {
case CTLTYPE_INT:
if (newsize == 0) {
if (!nflag)
fprintf(stdout, "%s = ", string);
fprintf(stdout, "%d\n", *(int *)buf);
} else {
if (!nflag)
fprintf(stdout, "%s: %d -> ", string,
*(int *)buf);
fprintf(stdout, "%d\n", *(int *)newval);
}
return;
case CTLTYPE_STRING:
if (newsize == 0) {
if (!nflag)
fprintf(stdout, "%s = ", string);
fprintf(stdout, "%s\n", buf);
} else {
if (!nflag)
fprintf(stdout, "%s: %s -> ", string, buf);
fprintf(stdout, "%s\n", newval);
}
return;
case CTLTYPE_QUAD:
if (newsize == 0) {
if (!nflag)
fprintf(stdout, "%s = ", string);
fprintf(stdout, "%qd\n", *(quad_t *)buf);
} else {
if (!nflag)
fprintf(stdout, "%s: %qd -> ", string,
*(quad_t *)buf);
fprintf(stdout, "%qd\n", *(quad_t *)newval);
}
return;
case CTLTYPE_STRUCT:
fprintf(stderr, "%s: unknown structure returned\n",
string);
return;
default:
case CTLTYPE_NODE:
fprintf(stderr, "%s: unknown type returned\n",
string);
return;
}
}
struct ctlname inetname[] = CTL_IPPROTO_NAMES;
struct ctlname ipname[] = IPCTL_NAMES;
struct ctlname icmpname[] = ICMPCTL_NAMES;
struct ctlname udpname[] = UDPCTL_NAMES;
struct ctlname tcpname[] = TCPCTL_NAMES;
struct ctlname igmpname[] = IGMPCTL_NAMES;
struct list inetlist = { inetname, IPPROTO_MAXID };
struct list inetvars[] = {
{ ipname, IPCTL_MAXID }, /* ip */
{ icmpname, ICMPCTL_MAXID }, /* icmp */
{ igmpname, IGMPCTL_MAXID }, /* igmp */
{ 0, 0 }, /* ggp */
{ 0, 0 }, /* ipencap */
{ 0, 0 },
{ tcpname, TCPCTL_MAXID }, /* tcp */
{ 0, 0 },
{ 0, 0 }, /* egp */
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ 0, 0 }, /* pup */
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ 0, 0 },
{ udpname, UDPCTL_MAXID }, /* udp */
};
/*
* handle internet requests
*/
int
sysctl_inet(string, bufpp, mib, flags, typep, specialp)
char *string;
char **bufpp;
int mib[];
int flags;
int *typep;
int *specialp;
{
struct list *lp;
int indx;
if (*bufpp == NULL) {
listall(string, &inetlist);
return (-1);
}
if ((indx = findname(string, "third", bufpp, &inetlist)) == -1)
return (-1);
mib[2] = indx;
if (indx <= IPPROTO_UDP && inetvars[indx].list != NULL)
lp = &inetvars[indx];
else if (!flags)
return (-1);
else {
fprintf(stderr, "%s: no variables defined for this protocol\n",
string);
return (-1);
}
if (*bufpp == NULL) {
listall(string, lp);
return (-1);
}
if ((indx = findname(string, "fourth", bufpp, lp)) == -1)
return (-1);
mib[3] = indx;
*typep = lp->list[indx].ctl_type;
return (4);
}
/*
* Scan a list of names searching for a particular name.
*/
findname(string, level, bufp, namelist)
char *string;
char *level;
char **bufp;
struct list *namelist;
{
char *name;
int i;
if (namelist->list == 0 || (name = strsep(bufp, ".")) == NULL) {
fprintf(stderr, "%s: incomplete specification\n", string);
return (-1);
}
for (i = 0; i < namelist->size; i++)
if (namelist->list[i].ctl_name != NULL &&
strcmp(name, namelist->list[i].ctl_name) == 0)
break;
if (i == namelist->size) {
fprintf(stderr, "%s level name %s in %s is invalid\n",
level, name, string);
return (-1);
}
return (i);
}
usage()
{
(void)fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n\t%s\n",
"sysctl [-n] variable ...", "sysctl [-n] -w variable=value ...",
"sysctl [-n] -a", "sysctl [-n] -A");
exit(1);
}
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