[unix-history] / usr / src / usr.sbin / sysctl / sysctl.c

/*
 * Copyright (c) 1993 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1993 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)sysctl.c	5.10 (Berkeley) %G%";
#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 <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 <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;
struct ctlname debugname[CTL_DEBUG_MAXID];
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, CTL_DEBUG_MAXID },		/* CTL_DEBUG */
	{ hwname, HW_MAXID },		/* CTL_HW */
	{ 0, 0 },			/* CTL_MACHDEP */
	{ username, USER_MAXID },	/* CTL_USER_NAMES */
};

int	Aflag, aflag, nflag, wflag;

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) {
		debuginit();
		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 isclockrate = 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;
	if (indx == CTL_DEBUG)
		debuginit();
	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:
			isclockrate = 1;
			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);
			if (len >= 0)
				break;
			return;
		}
		if (flags == 0)
			return;
		fprintf(stderr, "Use netstat to view %s information\n", string);
		return;

	case CTL_DEBUG:
		mib[2] = CTL_DEBUG_VALUE;
		len = 3;
		break;

	case CTL_FS:
	case CTL_MACHDEP:
	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 (isclockrate) {
		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;
	}
	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;
	}
}

/*
 * Initialize the set of debugging names
 */
debuginit()
{
	int mib[3], size, loc, i;

	if (secondlevel[CTL_DEBUG].list != 0)
		return;
	secondlevel[CTL_DEBUG].list = debugname;
	mib[0] = CTL_DEBUG;
	mib[2] = CTL_DEBUG_NAME;
	for (loc = 0, i = 0; i < CTL_DEBUG_MAXID; i++) {
		mib[1] = i;
		size = BUFSIZ - loc;
		if (sysctl(mib, 3, &names[loc], &size, NULL, 0) == -1)
			continue;
		debugname[i].ctl_name = &names[loc];
		debugname[i].ctl_type = CTLTYPE_INT;
		loc += size;
	}
}

struct ctlname inetname[] = CTL_IPPROTO_NAMES;
struct ctlname ipname[] = IPCTL_NAMES;
struct ctlname icmpname[] = ICMPCTL_NAMES;
struct ctlname udpname[] = UDPCTL_NAMES;
struct list inetlist = { inetname, IPPROTO_MAXID };
struct list inetvars[] = {
	{ ipname, IPCTL_MAXID },	/* ip */
	{ icmpname, ICMPCTL_MAXID },	/* icmp */
	{ 0, 0 },			/* igmp */
	{ 0, 0 },			/* ggmp */
	{ 0, 0 },
	{ 0, 0 },
	{ 0, 0 },			/* 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
 */
sysctl_inet(string, bufpp, mib, flags, typep)
	char *string;
	char **bufpp;
	int mib[];
	int flags;
	int *typep;
{
	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);
}
Commit	Line	Data
33a39b1e KM	1	/*
	2	* Copyright (c) 1993 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* %sccs.include.redist.c%
	6	*/
	7
	8	#ifndef lint
	9	char copyright[] =
	10	"@(#) Copyright (c) 1993 The Regents of the University of California.\n\
	11	All rights reserved.\n";
	12	#endif /* not lint */
	13
	14	#ifndef lint
759ce31c	15	static char sccsid[] = "@(#)sysctl.c 5.10 (Berkeley) %G%";
33a39b1e KM	16	#endif /* not lint */
33a39b1e KM	17
3a9dd945	18	#include <sys/param.h>
629efb73	19	#include <sys/gmon.h>
33a39b1e KM	20	#include <sys/stat.h>
	21	#include <sys/sysctl.h>
	22	#include <sys/socket.h>
	23	#include <vm/vm_param.h>
3a9dd945	24
129fa670 KM	25	#include <netinet/in.h>
	26	#include <netinet/in_systm.h>
	27	#include <netinet/ip.h>
	28	#include <netinet/ip_icmp.h>
	29	#include <netinet/icmp_var.h>
5082da2b KM	30	#include <netinet/ip_var.h>
	31	#include <netinet/udp.h>
	32	#include <netinet/udp_var.h>
3a9dd945	33
33a39b1e	34	#include <errno.h>
3a9dd945	35	#include <stdio.h>
33a39b1e KM	36	#include <stdlib.h>
33a39b1e KM	37	#include <string.h>
33a39b1e	38
129fa670 KM	39	struct ctlname topname[] = CTL_NAMES;
	40	struct ctlname kernname[] = CTL_KERN_NAMES;
	41	struct ctlname vmname[] = CTL_VM_NAMES;
	42	struct ctlname netname[] = CTL_NET_NAMES;
	43	struct ctlname hwname[] = CTL_HW_NAMES;
759ce31c	44	struct ctlname username[] = CTL_USER_NAMES;
1fdacbde KM	45	struct ctlname debugname[CTL_DEBUG_MAXID];
1fdacbde KM	46	char names[BUFSIZ];
33a39b1e KM	47
33a39b1e KM	48	struct list {
129fa670	49	struct ctlname *list;
33a39b1e	50	int size;
129fa670 KM	51	};
	52	struct list toplist = { topname, CTL_MAXID };
	53	struct list secondlevel[] = {
33a39b1e KM	54	{ 0, 0 }, /* CTL_UNSPEC */
	55	{ kernname, KERN_MAXID }, /* CTL_KERN */
	56	{ vmname, VM_MAXID }, /* CTL_VM */
	57	{ 0, 0 }, /* CTL_FS */
	58	{ netname, NET_MAXID }, /* CTL_NET */
1fdacbde	59	{ 0, CTL_DEBUG_MAXID }, /* CTL_DEBUG */
33a39b1e KM	60	{ hwname, HW_MAXID }, /* CTL_HW */
33a39b1e KM	61	{ 0, 0 }, /* CTL_MACHDEP */
759ce31c	62	{ username, USER_MAXID }, /* CTL_USER_NAMES */
33a39b1e KM	63	};
33a39b1e KM	64
18ca9a3c	65	int Aflag, aflag, nflag, wflag;
33a39b1e KM	66
	67	int
	68	main(argc, argv)
	69	int argc;
	70	char *argv[];
	71	{
	72	extern char *optarg;
	73	extern int optind;
18ca9a3c	74	int ch, lvl1;
33a39b1e	75
18ca9a3c	76	while ((ch = getopt(argc, argv, "Aanw")) != EOF) {
33a39b1e KM	77	switch (ch) {
	78
	79	case 'A':
	80	Aflag = 1;
	81	break;
	82
	83	case 'a':
	84	aflag = 1;
	85	break;
	86
18ca9a3c KM	87	case 'n':
	88	nflag = 1;
	89	break;
	90
33a39b1e KM	91	case 'w':
	92	wflag = 1;
	93	break;
	94
	95	default:
	96	usage();
	97	}
	98	}
	99	argc -= optind;
	100	argv += optind;
	101
	102	if (Aflag \|\| aflag) {
1fdacbde	103	debuginit();
18ca9a3c	104	for (lvl1 = 1; lvl1 < CTL_MAXID; lvl1++)
129fa670	105	listall(topname[lvl1].ctl_name, &secondlevel[lvl1]);
33a39b1e KM	106	exit(0);
	107	}
	108	if (argc == 0)
	109	usage();
	110	while (argc-- > 0)
	111	parse(*argv, 1);
	112	exit(0);
	113	}
	114
	115	/*
	116	* List all variables known to the system.
	117	*/
129fa670 KM	118	listall(prefix, lp)
129fa670 KM	119	char *prefix;
33a39b1e	120	struct list *lp;
129fa670	121	{
18ca9a3c	122	int lvl2;
33a39b1e KM	123	char *cp, name[BUFSIZ];
33a39b1e KM	124
18ca9a3c KM	125	if (lp->list == 0)
18ca9a3c KM	126	return;
129fa670	127	strcpy(name, prefix);
18ca9a3c KM	128	cp = &name[strlen(name)];
18ca9a3c KM	129	*cp++ = '.';
129fa670 KM	130	for (lvl2 = 0; lvl2 < lp->size; lvl2++) {
	131	if (lp->list[lvl2].ctl_name == 0)
	132	continue;
	133	strcpy(cp, lp->list[lvl2].ctl_name);
18ca9a3c	134	parse(name, Aflag);
33a39b1e KM	135	}
	136	}
	137
	138	/*
	139	* Parse a name into a MIB entry.
	140	* Lookup and print out the MIB entry if it exists.
	141	* Set a new value if requested.
	142	*/
	143	parse(string, flags)
	144	char *string;
	145	int flags;
	146	{
629efb73	147	int indx, type, state, size, len;
33a39b1e KM	148	int isclockrate = 0;
	149	void *newval = 0;
	150	int intval, newsize = 0;
129fa670 KM	151	quad_t quadval;
129fa670 KM	152	struct list *lp;
33a39b1e KM	153	int mib[CTL_MAXNAME];
	154	char cp, bufp, buf[BUFSIZ], strval[BUFSIZ];
	155
	156	bufp = buf;
	157	snprintf(buf, BUFSIZ, "%s", string);
	158	if ((cp = strchr(string, '=')) != NULL) {
	159	if (!wflag) {
	160	fprintf(stderr, "Must specify -w to set variables\n");
	161	exit(2);
	162	}
	163	*strchr(buf, '=') = '\0';
	164	*cp++ = '\0';
	165	while (isspace(*cp))
	166	cp++;
129fa670 KM	167	newval = cp;
129fa670 KM	168	newsize = strlen(cp);
33a39b1e	169	}
129fa670	170	if ((indx = findname(string, "top", &bufp, &toplist)) == -1)
33a39b1e KM	171	return;
33a39b1e KM	172	mib[0] = indx;
1fdacbde KM	173	if (indx == CTL_DEBUG)
1fdacbde KM	174	debuginit();
33a39b1e KM	175	lp = &secondlevel[indx];
	176	if (lp->list == 0) {
	177	fprintf(stderr, "%s: class is not implemented\n",
	178	topname[indx]);
	179	return;
	180	}
18ca9a3c	181	if (bufp == NULL) {
129fa670	182	listall(topname[indx].ctl_name, lp);
18ca9a3c KM	183	return;
18ca9a3c KM	184	}
33a39b1e KM	185	if ((indx = findname(string, "second", &bufp, lp)) == -1)
	186	return;
	187	mib[1] = indx;
129fa670 KM	188	type = lp->list[indx].ctl_type;
129fa670 KM	189	len = 2;
33a39b1e KM	190	switch (mib[0]) {
	191
	192	case CTL_KERN:
	193	switch (mib[1]) {
629efb73 KM	194	case KERN_PROF:
	195	mib[2] = GPROF_STATE;
	196	size = sizeof state;
	197	if (sysctl(mib, 3, &state, &size, NULL, 0) < 0) {
	198	if (flags == 0)
	199	return;
	200	if (!nflag)
	201	fprintf(stdout, "%s: ", string);
	202	fprintf(stderr,
	203	"kernel is not compiled for profiling\n");
	204	return;
	205	}
	206	if (!nflag)
	207	fprintf(stdout, "%s: %s\n", string,
	208	state == GMON_PROF_OFF ? "off" : "running");
	209	return;
33a39b1e KM	210	case KERN_VNODE:
	211	case KERN_FILE:
	212	if (flags == 0)
	213	return;
	214	fprintf(stderr,
	215	"Use pstat to view %s information\n", string);
	216	return;
	217	case KERN_PROC:
	218	if (flags == 0)
	219	return;
	220	fprintf(stderr,
	221	"Use ps to view %s information\n", string);
	222	return;
	223	case KERN_CLOCKRATE:
	224	isclockrate = 1;
	225	break;
	226	}
	227	break;
	228
	229	case CTL_HW:
	230	break;
	231
	232	case CTL_VM:
	233	if (mib[1] == VM_LOADAVG) {
	234	double loads[3];
	235
	236	getloadavg(loads, 3);
18ca9a3c KM	237	if (!nflag)
	238	fprintf(stdout, "%s: ", string);
	239	fprintf(stdout, "%.2f %.2f %.2f\n",
33a39b1e KM	240	loads[0], loads[1], loads[2]);
	241	return;
	242	}
	243	if (flags == 0)
	244	return;
	245	fprintf(stderr,
	246	"Use vmstat or systat to view %s information\n", string);
	247	return;
	248
	249	case CTL_NET:
129fa670 KM	250	if (mib[1] == PF_INET) {
	251	len = sysctl_inet(string, &bufp, mib, flags, &type);
	252	if (len >= 0)
	253	break;
	254	return;
	255	}
33a39b1e KM	256	if (flags == 0)
	257	return;
	258	fprintf(stderr, "Use netstat to view %s information\n", string);
	259	return;
	260
33a39b1e	261	case CTL_DEBUG:
1fdacbde KM	262	mib[2] = CTL_DEBUG_VALUE;
	263	len = 3;
	264	break;
	265
	266	case CTL_FS:
33a39b1e	267	case CTL_MACHDEP:
759ce31c	268	case CTL_USER:
33a39b1e KM	269	break;
	270
	271	default:
	272	fprintf(stderr, "Illegal top level value: %d\n", mib[0]);
	273	return;
	274
	275	}
129fa670 KM	276	if (bufp) {
	277	fprintf(stderr, "name %s in %s is unknown\n", *bufp, string);
	278	return;
	279	}
	280	if (newsize > 0) {
	281	switch (type) {
	282	case CTLTYPE_INT:
	283	intval = atoi(newval);
	284	newval = &intval;
	285	newsize = sizeof intval;
	286	break;
33a39b1e	287
129fa670 KM	288	case CTLTYPE_QUAD:
	289	sscanf(newval, "%qd", &quadval);
	290	newval = &quadval;
	291	newsize = sizeof quadval;
	292	break;
	293	}
	294	}
33a39b1e	295	size = BUFSIZ;
129fa670	296	if (sysctl(mib, len, buf, &size, newsize ? newval : 0, newsize) == -1) {
33a39b1e KM	297	if (flags == 0)
	298	return;
	299	switch (errno) {
	300	case EOPNOTSUPP:
	301	fprintf(stderr, "%s: value is not available\n", string);
	302	return;
	303	case ENOTDIR:
	304	fprintf(stderr, "%s: specification is incomplete\n",
	305	string);
	306	return;
	307	case ENOMEM:
	308	fprintf(stderr, "%s: type is unknown to this program\n",
	309	string);
	310	return;
	311	default:
	312	perror(string);
	313	return;
	314	}
	315	}
	316	if (isclockrate) {
	317	struct clockinfo clkp = (struct clockinfo )buf;
	318
18ca9a3c KM	319	if (!nflag)
18ca9a3c KM	320	fprintf(stdout, "%s: ", string);
33a39b1e	321	fprintf(stdout,
18ca9a3c KM	322	"hz = %d, tick = %d, profhz = %d, stathz = %d\n",
18ca9a3c KM	323	clkp->hz, clkp->tick, clkp->profhz, clkp->stathz);
33a39b1e KM	324	return;
33a39b1e KM	325	}
129fa670 KM	326	switch (type) {
129fa670 KM	327	case CTLTYPE_INT:
18ca9a3c KM	328	if (newsize == 0) {
	329	if (!nflag)
	330	fprintf(stdout, "%s = ", string);
	331	fprintf(stdout, "%d\n", (int )buf);
	332	} else {
	333	if (!nflag)
	334	fprintf(stdout, "%s: %d -> ", string,
	335	(int )buf);
	336	fprintf(stdout, "%d\n", (int )newval);
	337	}
129fa670 KM	338	return;
	339
	340	case CTLTYPE_STRING:
18ca9a3c KM	341	if (newsize == 0) {
	342	if (!nflag)
	343	fprintf(stdout, "%s = ", string);
	344	fprintf(stdout, "%s\n", buf);
	345	} else {
	346	if (!nflag)
	347	fprintf(stdout, "%s: %s -> ", string, buf);
	348	fprintf(stdout, "%s\n", newval);
	349	}
129fa670 KM	350	return;
	351
	352	case CTLTYPE_QUAD:
	353	if (newsize == 0) {
	354	if (!nflag)
	355	fprintf(stdout, "%s = ", string);
	356	fprintf(stdout, "%qd\n", (quad_t )buf);
	357	} else {
	358	if (!nflag)
	359	fprintf(stdout, "%s: %qd -> ", string,
	360	(quad_t )buf);
	361	fprintf(stdout, "%qd\n", (quad_t )newval);
	362	}
	363	return;
	364
	365	case CTLTYPE_STRUCT:
	366	fprintf(stderr, "%s: unknown structure returned\n",
	367	string);
	368	return;
	369
	370	default:
	371	case CTLTYPE_NODE:
	372	fprintf(stderr, "%s: unknown type returned\n",
	373	string);
	374	return;
	375	}
	376	}
	377
1fdacbde KM	378	/*
	379	* Initialize the set of debugging names
	380	*/
	381	debuginit()
	382	{
	383	int mib[3], size, loc, i;
	384
	385	if (secondlevel[CTL_DEBUG].list != 0)
	386	return;
	387	secondlevel[CTL_DEBUG].list = debugname;
	388	mib[0] = CTL_DEBUG;
	389	mib[2] = CTL_DEBUG_NAME;
	390	for (loc = 0, i = 0; i < CTL_DEBUG_MAXID; i++) {
	391	mib[1] = i;
	392	size = BUFSIZ - loc;
	393	if (sysctl(mib, 3, &names[loc], &size, NULL, 0) == -1)
	394	continue;
	395	debugname[i].ctl_name = &names[loc];
	396	debugname[i].ctl_type = CTLTYPE_INT;
	397	loc += size;
	398	}
	399	}
	400
129fa670 KM	401	struct ctlname inetname[] = CTL_IPPROTO_NAMES;
	402	struct ctlname ipname[] = IPCTL_NAMES;
	403	struct ctlname icmpname[] = ICMPCTL_NAMES;
5082da2b	404	struct ctlname udpname[] = UDPCTL_NAMES;
129fa670 KM	405	struct list inetlist = { inetname, IPPROTO_MAXID };
129fa670 KM	406	struct list inetvars[] = {
5082da2b KM	407	{ ipname, IPCTL_MAXID }, /* ip */
	408	{ icmpname, ICMPCTL_MAXID }, /* icmp */
	409	{ 0, 0 }, /* igmp */
	410	{ 0, 0 }, /* ggmp */
	411	{ 0, 0 },
	412	{ 0, 0 },
	413	{ 0, 0 }, /* tcp */
	414	{ 0, 0 },
	415	{ 0, 0 }, /* egp */
	416	{ 0, 0 },
	417	{ 0, 0 },
	418	{ 0, 0 },
	419	{ 0, 0 }, /* pup */
	420	{ 0, 0 },
	421	{ 0, 0 },
	422	{ 0, 0 },
	423	{ 0, 0 },
	424	{ udpname, UDPCTL_MAXID }, /* udp */
129fa670 KM	425	};
	426
	427	/*
	428	* handle internet requests
	429	*/
	430	sysctl_inet(string, bufpp, mib, flags, typep)
	431	char *string;
	432	char **bufpp;
	433	int mib[];
	434	int flags;
	435	int *typep;
	436	{
	437	struct list *lp;
	438	int indx;
	439
	440	if (*bufpp == NULL) {
	441	listall(string, &inetlist);
	442	return (-1);
	443	}
	444	if ((indx = findname(string, "third", bufpp, &inetlist)) == -1)
	445	return (-1);
	446	mib[2] = indx;
5082da2b	447	if (indx <= IPPROTO_UDP && inetvars[indx].list != NULL)
129fa670 KM	448	lp = &inetvars[indx];
	449	else if (!flags)
	450	return (-1);
	451	else {
	452	fprintf(stderr, "%s: no variables defined for this protocol\n",
	453	string);
	454	return (-1);
	455	}
	456	if (*bufpp == NULL) {
	457	listall(string, lp);
	458	return (-1);
	459	}
	460	if ((indx = findname(string, "fourth", bufpp, lp)) == -1)
	461	return (-1);
	462	mib[3] = indx;
	463	*typep = lp->list[indx].ctl_type;
	464	return (4);
33a39b1e KM	465	}
	466
	467	/*
	468	* Scan a list of names searching for a particular name.
	469	*/
	470	findname(string, level, bufp, namelist)
	471	char *string;
	472	char *level;
	473	char **bufp;
	474	struct list *namelist;
	475	{
	476	char *name;
	477	int i;
	478
	479	if (namelist->list == 0 \|\| (name = strsep(bufp, ".")) == NULL) {
	480	fprintf(stderr, "%s: incomplete specification\n", string);
	481	return (-1);
	482	}
	483	for (i = 0; i < namelist->size; i++)
cdbdb4d7 CT	484	if (namelist->list[i].ctl_name != NULL &&
cdbdb4d7 CT	485	strcmp(name, namelist->list[i].ctl_name) == 0)
33a39b1e KM	486	break;
	487	if (i == namelist->size) {
	488	fprintf(stderr, "%s level name %s in %s is invalid\n",
	489	level, name, string);
	490	return (-1);
	491	}
	492	return (i);
	493	}
	494
	495	usage()
	496	{
	497
31ac5c9a KM	498	(void)fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n\t%s\n",
	499	"sysctl [-n] variable ...", "sysctl [-n] -w variable=value ...",
	500	"sysctl [-n] -a", "sysctl [-n] -A");
33a39b1e KM	501	exit(1);
33a39b1e KM	502	}