xref: /freebsd/sbin/sysctl/sysctl.c (revision d2ce15bd43b3a1dcce08eecbff8d5d359946d972)
1 /*
2  * Copyright (c) 1993
3  *	The Regents of the University of California.  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  * 4. Neither the name of the University nor the names of its 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 REGENTS 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 REGENTS 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 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1993\n\
33 	The Regents of the University of California.  All rights reserved.\n";
34 #endif /* not lint */
35 
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)from: sysctl.c	8.1 (Berkeley) 6/6/93";
39 #endif
40 static const char rcsid[] =
41   "$FreeBSD$";
42 #endif /* not lint */
43 
44 #include <sys/param.h>
45 #include <sys/time.h>
46 #include <sys/resource.h>
47 #include <sys/stat.h>
48 #include <sys/sysctl.h>
49 #include <sys/vmmeter.h>
50 
51 #include <ctype.h>
52 #include <err.h>
53 #include <errno.h>
54 #include <inttypes.h>
55 #include <locale.h>
56 #include <stdio.h>
57 #include <stdlib.h>
58 #include <string.h>
59 #include <sysexits.h>
60 #include <unistd.h>
61 
62 static const char *conffile;
63 
64 static int	aflag, bflag, dflag, eflag, hflag, iflag;
65 static int	Nflag, nflag, oflag, qflag, Tflag, Wflag, xflag;
66 
67 static int	oidfmt(int *, int, char *, u_int *);
68 static int	parsefile(const char *);
69 static int	parse(const char *, int);
70 static int	show_var(int *, int);
71 static int	sysctl_all(int *oid, int len);
72 static int	name2oid(char *, int *);
73 
74 static int	set_IK(const char *, int *);
75 
76 static void
77 usage(void)
78 {
79 
80 	(void)fprintf(stderr, "%s\n%s\n",
81 	    "usage: sysctl [-bdehiNnoqTWx] [-f filename] name[=value] ...",
82 	    "       sysctl [-bdehNnoqTWx] -a");
83 	exit(1);
84 }
85 
86 int
87 main(int argc, char **argv)
88 {
89 	int ch;
90 	int warncount = 0;
91 
92 	setlocale(LC_NUMERIC, "");
93 	setbuf(stdout,0);
94 	setbuf(stderr,0);
95 
96 	while ((ch = getopt(argc, argv, "Aabdef:hiNnoqTwWxX")) != -1) {
97 		switch (ch) {
98 		case 'A':
99 			/* compatibility */
100 			aflag = oflag = 1;
101 			break;
102 		case 'a':
103 			aflag = 1;
104 			break;
105 		case 'b':
106 			bflag = 1;
107 			break;
108 		case 'd':
109 			dflag = 1;
110 			break;
111 		case 'e':
112 			eflag = 1;
113 			break;
114 		case 'f':
115 			conffile = optarg;
116 			break;
117 		case 'h':
118 			hflag = 1;
119 			break;
120 		case 'i':
121 			iflag = 1;
122 			break;
123 		case 'N':
124 			Nflag = 1;
125 			break;
126 		case 'n':
127 			nflag = 1;
128 			break;
129 		case 'o':
130 			oflag = 1;
131 			break;
132 		case 'q':
133 			qflag = 1;
134 			break;
135 		case 'T':
136 			Tflag = 1;
137 			break;
138 		case 'w':
139 			/* compatibility */
140 			/* ignored */
141 			break;
142 		case 'W':
143 			Wflag = 1;
144 			break;
145 		case 'X':
146 			/* compatibility */
147 			aflag = xflag = 1;
148 			break;
149 		case 'x':
150 			xflag = 1;
151 			break;
152 		default:
153 			usage();
154 		}
155 	}
156 	argc -= optind;
157 	argv += optind;
158 
159 	if (Nflag && nflag)
160 		usage();
161 	if (aflag && argc == 0)
162 		exit(sysctl_all(0, 0));
163 	if (argc == 0 && conffile == NULL)
164 		usage();
165 
166 	warncount = 0;
167 	if (conffile != NULL)
168 		warncount += parsefile(conffile);
169 
170 	while (argc-- > 0)
171 		warncount += parse(*argv++, 0);
172 
173 	return (warncount);
174 }
175 
176 /*
177  * Parse a name into a MIB entry.
178  * Lookup and print out the MIB entry if it exists.
179  * Set a new value if requested.
180  */
181 static int
182 parse(const char *string, int lineno)
183 {
184 	int len, i, j;
185 	void *newval = 0;
186 	int intval;
187 	unsigned int uintval;
188 	long longval;
189 	unsigned long ulongval;
190 	size_t newsize = 0;
191 	int64_t i64val;
192 	uint64_t u64val;
193 	int mib[CTL_MAXNAME];
194 	char *cp, *bufp, buf[BUFSIZ], *endptr, fmt[BUFSIZ], line[BUFSIZ];
195 	u_int kind;
196 
197 	if (lineno)
198 		snprintf(line, sizeof(line), " at line %d", lineno);
199 	else
200 		line[0] = '\0';
201 
202 	cp = buf;
203 	if (snprintf(buf, BUFSIZ, "%s", string) >= BUFSIZ) {
204 		warn("oid too long: '%s'%s", string, line);
205 		return (1);
206 	}
207 	bufp = strsep(&cp, "=:");
208 	if (cp != NULL) {
209 		/* Tflag just lists tunables, do not allow assignment */
210 		if (Tflag || Wflag) {
211 			warnx("Can't set variables when using -T or -W");
212 			usage();
213 		}
214 		while (isspace(*cp))
215 			cp++;
216 		/* Strip a pair of " or ' if any. */
217 		switch (*cp) {
218 		case '\"':
219 		case '\'':
220 			if (cp[strlen(cp) - 1] == *cp)
221 				cp[strlen(cp) - 1] = '\0';
222 			cp++;
223 		}
224 		newval = cp;
225 		newsize = strlen(cp);
226 	}
227 	len = name2oid(bufp, mib);
228 
229 	if (len < 0) {
230 		if (iflag)
231 			return (0);
232 		if (qflag)
233 			return (1);
234 		else {
235 			warn("unknown oid '%s'%s", bufp, line);
236 			return (1);
237 		}
238 	}
239 
240 	if (oidfmt(mib, len, fmt, &kind)) {
241 		warn("couldn't find format of oid '%s'%s", bufp, line);
242 		if (iflag)
243 			return (1);
244 		else
245 			exit(1);
246 	}
247 
248 	if (newval == NULL || dflag) {
249 		if ((kind & CTLTYPE) == CTLTYPE_NODE) {
250 			if (dflag) {
251 				i = show_var(mib, len);
252 				if (!i && !bflag)
253 					putchar('\n');
254 			}
255 			sysctl_all(mib, len);
256 		} else {
257 			i = show_var(mib, len);
258 			if (!i && !bflag)
259 				putchar('\n');
260 		}
261 	} else {
262 		if ((kind & CTLTYPE) == CTLTYPE_NODE) {
263 			warn("oid '%s' isn't a leaf node%s", bufp, line);
264 			return (1);
265 		}
266 
267 		if (!(kind & CTLFLAG_WR)) {
268 			if (kind & CTLFLAG_TUN) {
269 				warnx("oid '%s' is a read only tunable%s", bufp, line);
270 				warnx("Tunable values are set in /boot/loader.conf");
271 			} else
272 				warnx("oid '%s' is read only%s", bufp, line);
273 			return (1);
274 		}
275 
276 		if ((kind & CTLTYPE) == CTLTYPE_INT ||
277 		    (kind & CTLTYPE) == CTLTYPE_UINT ||
278 		    (kind & CTLTYPE) == CTLTYPE_LONG ||
279 		    (kind & CTLTYPE) == CTLTYPE_ULONG ||
280 		    (kind & CTLTYPE) == CTLTYPE_S64 ||
281 		    (kind & CTLTYPE) == CTLTYPE_U64) {
282 			if (strlen(newval) == 0) {
283 				warnx("empty numeric value");
284 				return (1);
285 			}
286 		}
287 
288 		switch (kind & CTLTYPE) {
289 			case CTLTYPE_INT:
290 				if (strcmp(fmt, "IK") == 0) {
291 					if (!set_IK(newval, &intval)) {
292 						warnx("invalid value '%s'%s",
293 						    (char *)newval, line);
294 						return (1);
295 					}
296  				} else {
297 					intval = (int)strtol(newval, &endptr,
298 					    0);
299 					if (endptr == newval || *endptr != '\0') {
300 						warnx("invalid integer '%s'%s",
301 						    (char *)newval, line);
302 						return (1);
303 					}
304 				}
305 				newval = &intval;
306 				newsize = sizeof(intval);
307 				break;
308 			case CTLTYPE_UINT:
309 				uintval = (int) strtoul(newval, &endptr, 0);
310 				if (endptr == newval || *endptr != '\0') {
311 					warnx("invalid unsigned integer '%s'%s",
312 					    (char *)newval, line);
313 					return (1);
314 				}
315 				newval = &uintval;
316 				newsize = sizeof(uintval);
317 				break;
318 			case CTLTYPE_LONG:
319 				longval = strtol(newval, &endptr, 0);
320 				if (endptr == newval || *endptr != '\0') {
321 					warnx("invalid long integer '%s'%s",
322 					    (char *)newval, line);
323 					return (1);
324 				}
325 				newval = &longval;
326 				newsize = sizeof(longval);
327 				break;
328 			case CTLTYPE_ULONG:
329 				ulongval = strtoul(newval, &endptr, 0);
330 				if (endptr == newval || *endptr != '\0') {
331 					warnx("invalid unsigned long integer"
332 					    " '%s'%s", (char *)newval, line);
333 					return (1);
334 				}
335 				newval = &ulongval;
336 				newsize = sizeof(ulongval);
337 				break;
338 			case CTLTYPE_STRING:
339 				break;
340 			case CTLTYPE_S64:
341 				i64val = strtoimax(newval, &endptr, 0);
342 				if (endptr == newval || *endptr != '\0') {
343 					warnx("invalid int64_t '%s'%s",
344 					    (char *)newval, line);
345 					return (1);
346 				}
347 				newval = &i64val;
348 				newsize = sizeof(i64val);
349 				break;
350 			case CTLTYPE_U64:
351 				u64val = strtoumax(newval, &endptr, 0);
352 				if (endptr == newval || *endptr != '\0') {
353 					warnx("invalid uint64_t '%s'%s",
354 					    (char *)newval, line);
355 					return (1);
356 				}
357 				newval = &u64val;
358 				newsize = sizeof(u64val);
359 				break;
360 			case CTLTYPE_OPAQUE:
361 				/* FALLTHROUGH */
362 			default:
363 				warnx("oid '%s' is type %d,"
364 					" cannot set that%s", bufp,
365 					kind & CTLTYPE, line);
366 				return (1);
367 		}
368 
369 		i = show_var(mib, len);
370 		if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
371 			if (!i && !bflag)
372 				putchar('\n');
373 			switch (errno) {
374 			case EOPNOTSUPP:
375 				warnx("%s: value is not available%s",
376 					string, line);
377 				return (1);
378 			case ENOTDIR:
379 				warnx("%s: specification is incomplete%s",
380 					string, line);
381 				return (1);
382 			case ENOMEM:
383 				warnx("%s: type is unknown to this program%s",
384 					string, line);
385 				return (1);
386 			default:
387 				warn("%s%s", string, line);
388 				return (1);
389 			}
390 		}
391 		if (!bflag)
392 			printf(" -> ");
393 		i = nflag;
394 		nflag = 1;
395 		j = show_var(mib, len);
396 		if (!j && !bflag)
397 			putchar('\n');
398 		nflag = i;
399 	}
400 
401 	return (0);
402 }
403 
404 static int
405 parsefile(const char *filename)
406 {
407 	FILE *file;
408 	char line[BUFSIZ], *p, *pq, *pdq;
409 	int warncount = 0, lineno = 0;
410 
411 	file = fopen(filename, "r");
412 	if (file == NULL)
413 		err(EX_NOINPUT, "%s", filename);
414 	while (fgets(line, sizeof(line), file) != NULL) {
415 		lineno++;
416 		p = line;
417 		pq = strchr(line, '\'');
418 		pdq = strchr(line, '\"');
419 		/* Replace the first # with \0. */
420 		while((p = strchr(p, '#')) != NULL) {
421 			if (pq != NULL && p > pq) {
422 				if ((p = strchr(pq+1, '\'')) != NULL)
423 					*(++p) = '\0';
424 				break;
425 			} else if (pdq != NULL && p > pdq) {
426 				if ((p = strchr(pdq+1, '\"')) != NULL)
427 					*(++p) = '\0';
428 				break;
429 			} else if (p == line || *(p-1) != '\\') {
430 				*p = '\0';
431 				break;
432 			}
433 			p++;
434 		}
435 		/* Trim spaces */
436 		p = line + strlen(line) - 1;
437 		while (p >= line && isspace((int)*p)) {
438 			*p = '\0';
439 			p--;
440 		}
441 		p = line;
442 		while (isspace((int)*p))
443 			p++;
444 		if (*p == '\0')
445 			continue;
446 		else
447 			warncount += parse(p, lineno);
448 	}
449 	fclose(file);
450 
451 	return (warncount);
452 }
453 
454 /* These functions will dump out various interesting structures. */
455 
456 static int
457 S_clockinfo(int l2, void *p)
458 {
459 	struct clockinfo *ci = (struct clockinfo*)p;
460 
461 	if (l2 != sizeof(*ci)) {
462 		warnx("S_clockinfo %d != %zu", l2, sizeof(*ci));
463 		return (1);
464 	}
465 	printf(hflag ? "{ hz = %'d, tick = %'d, profhz = %'d, stathz = %'d }" :
466 		"{ hz = %d, tick = %d, profhz = %d, stathz = %d }",
467 		ci->hz, ci->tick, ci->profhz, ci->stathz);
468 	return (0);
469 }
470 
471 static int
472 S_loadavg(int l2, void *p)
473 {
474 	struct loadavg *tv = (struct loadavg*)p;
475 
476 	if (l2 != sizeof(*tv)) {
477 		warnx("S_loadavg %d != %zu", l2, sizeof(*tv));
478 		return (1);
479 	}
480 	printf(hflag ? "{ %'.2f %'.2f %'.2f }" : "{ %.2f %.2f %.2f }",
481 		(double)tv->ldavg[0]/(double)tv->fscale,
482 		(double)tv->ldavg[1]/(double)tv->fscale,
483 		(double)tv->ldavg[2]/(double)tv->fscale);
484 	return (0);
485 }
486 
487 static int
488 S_timeval(int l2, void *p)
489 {
490 	struct timeval *tv = (struct timeval*)p;
491 	time_t tv_sec;
492 	char *p1, *p2;
493 
494 	if (l2 != sizeof(*tv)) {
495 		warnx("S_timeval %d != %zu", l2, sizeof(*tv));
496 		return (1);
497 	}
498 	printf(hflag ? "{ sec = %'jd, usec = %'ld } " :
499 		"{ sec = %jd, usec = %ld } ",
500 		(intmax_t)tv->tv_sec, tv->tv_usec);
501 	tv_sec = tv->tv_sec;
502 	p1 = strdup(ctime(&tv_sec));
503 	for (p2=p1; *p2 ; p2++)
504 		if (*p2 == '\n')
505 			*p2 = '\0';
506 	fputs(p1, stdout);
507 	free(p1);
508 	return (0);
509 }
510 
511 static int
512 S_vmtotal(int l2, void *p)
513 {
514 	struct vmtotal *v = (struct vmtotal *)p;
515 	int pageKilo = getpagesize() / 1024;
516 
517 	if (l2 != sizeof(*v)) {
518 		warnx("S_vmtotal %d != %zu", l2, sizeof(*v));
519 		return (1);
520 	}
521 
522 	printf(
523 	    "\nSystem wide totals computed every five seconds:"
524 	    " (values in kilobytes)\n");
525 	printf("===============================================\n");
526 	printf(
527 	    "Processes:\t\t(RUNQ: %hd Disk Wait: %hd Page Wait: "
528 	    "%hd Sleep: %hd)\n",
529 	    v->t_rq, v->t_dw, v->t_pw, v->t_sl);
530 	printf(
531 	    "Virtual Memory:\t\t(Total: %dK Active: %dK)\n",
532 	    v->t_vm * pageKilo, v->t_avm * pageKilo);
533 	printf("Real Memory:\t\t(Total: %dK Active: %dK)\n",
534 	    v->t_rm * pageKilo, v->t_arm * pageKilo);
535 	printf("Shared Virtual Memory:\t(Total: %dK Active: %dK)\n",
536 	    v->t_vmshr * pageKilo, v->t_avmshr * pageKilo);
537 	printf("Shared Real Memory:\t(Total: %dK Active: %dK)\n",
538 	    v->t_rmshr * pageKilo, v->t_armshr * pageKilo);
539 	printf("Free Memory:\t%dK\n", v->t_free * pageKilo);
540 
541 	return (0);
542 }
543 
544 static int
545 set_IK(const char *str, int *val)
546 {
547 	float temp;
548 	int len, kelv;
549 	const char *p;
550 	char *endptr;
551 
552 	if ((len = strlen(str)) == 0)
553 		return (0);
554 	p = &str[len - 1];
555 	if (*p == 'C' || *p == 'F') {
556 		temp = strtof(str, &endptr);
557 		if (endptr == str || endptr != p)
558 			return (0);
559 		if (*p == 'F')
560 			temp = (temp - 32) * 5 / 9;
561 		kelv = temp * 10 + 2732;
562 	} else {
563 		kelv = (int)strtol(str, &endptr, 10);
564 		if (endptr == str || *endptr != '\0')
565 			return (0);
566 	}
567 	*val = kelv;
568 	return (1);
569 }
570 
571 /*
572  * These functions uses a presently undocumented interface to the kernel
573  * to walk the tree and get the type so it can print the value.
574  * This interface is under work and consideration, and should probably
575  * be killed with a big axe by the first person who can find the time.
576  * (be aware though, that the proper interface isn't as obvious as it
577  * may seem, there are various conflicting requirements.
578  */
579 
580 static int
581 name2oid(char *name, int *oidp)
582 {
583 	int oid[2];
584 	int i;
585 	size_t j;
586 
587 	oid[0] = 0;
588 	oid[1] = 3;
589 
590 	j = CTL_MAXNAME * sizeof(int);
591 	i = sysctl(oid, 2, oidp, &j, name, strlen(name));
592 	if (i < 0)
593 		return (i);
594 	j /= sizeof(int);
595 	return (j);
596 }
597 
598 static int
599 oidfmt(int *oid, int len, char *fmt, u_int *kind)
600 {
601 	int qoid[CTL_MAXNAME+2];
602 	u_char buf[BUFSIZ];
603 	int i;
604 	size_t j;
605 
606 	qoid[0] = 0;
607 	qoid[1] = 4;
608 	memcpy(qoid + 2, oid, len * sizeof(int));
609 
610 	j = sizeof(buf);
611 	i = sysctl(qoid, len + 2, buf, &j, 0, 0);
612 	if (i)
613 		err(1, "sysctl fmt %d %zu %d", i, j, errno);
614 
615 	if (kind)
616 		*kind = *(u_int *)buf;
617 
618 	if (fmt)
619 		strcpy(fmt, (char *)(buf + sizeof(u_int)));
620 	return (0);
621 }
622 
623 static int ctl_sign[CTLTYPE+1] = {
624 	[CTLTYPE_INT] = 1,
625 	[CTLTYPE_LONG] = 1,
626 	[CTLTYPE_S64] = 1,
627 };
628 
629 static int ctl_size[CTLTYPE+1] = {
630 	[CTLTYPE_INT] = sizeof(int),
631 	[CTLTYPE_UINT] = sizeof(u_int),
632 	[CTLTYPE_LONG] = sizeof(long),
633 	[CTLTYPE_ULONG] = sizeof(u_long),
634 	[CTLTYPE_S64] = sizeof(int64_t),
635 	[CTLTYPE_U64] = sizeof(int64_t),
636 };
637 
638 /*
639  * This formats and outputs the value of one variable
640  *
641  * Returns zero if anything was actually output.
642  * Returns one if didn't know what to do with this.
643  * Return minus one if we had errors.
644  */
645 static int
646 show_var(int *oid, int nlen)
647 {
648 	u_char buf[BUFSIZ], *val, *oval, *p;
649 	char name[BUFSIZ], fmt[BUFSIZ];
650 	const char *sep, *sep1;
651 	int qoid[CTL_MAXNAME+2];
652 	uintmax_t umv;
653 	intmax_t mv;
654 	int i, hexlen, sign, ctltype;
655 	size_t intlen;
656 	size_t j, len;
657 	u_int kind;
658 	int (*func)(int, void *);
659 
660 	/* Silence GCC. */
661 	umv = mv = intlen = 0;
662 
663 	bzero(buf, BUFSIZ);
664 	bzero(fmt, BUFSIZ);
665 	bzero(name, BUFSIZ);
666 	qoid[0] = 0;
667 	memcpy(qoid + 2, oid, nlen * sizeof(int));
668 
669 	qoid[1] = 1;
670 	j = sizeof(name);
671 	i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
672 	if (i || !j)
673 		err(1, "sysctl name %d %zu %d", i, j, errno);
674 
675 	oidfmt(oid, nlen, fmt, &kind);
676 	/* if Wflag then only list sysctls that are writeable and not stats. */
677 	if (Wflag && ((kind & CTLFLAG_WR) == 0 || (kind & CTLFLAG_STATS) != 0))
678 		return 1;
679 
680 	/* if Tflag then only list sysctls that are tuneables. */
681 	if (Tflag && (kind & CTLFLAG_TUN) == 0)
682 		return 1;
683 
684 	if (Nflag) {
685 		printf("%s", name);
686 		return (0);
687 	}
688 
689 	if (eflag)
690 		sep = "=";
691 	else
692 		sep = ": ";
693 
694 	if (dflag) {	/* just print description */
695 		qoid[1] = 5;
696 		j = sizeof(buf);
697 		i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
698 		if (!nflag)
699 			printf("%s%s", name, sep);
700 		printf("%s", buf);
701 		return (0);
702 	}
703 	/* find an estimate of how much we need for this var */
704 	j = 0;
705 	i = sysctl(oid, nlen, 0, &j, 0, 0);
706 	j += j; /* we want to be sure :-) */
707 
708 	val = oval = malloc(j + 1);
709 	if (val == NULL) {
710 		warnx("malloc failed");
711 		return (1);
712 	}
713 	len = j;
714 	i = sysctl(oid, nlen, val, &len, 0, 0);
715 	if (i || !len) {
716 		free(oval);
717 		return (1);
718 	}
719 
720 	if (bflag) {
721 		fwrite(val, 1, len, stdout);
722 		free(oval);
723 		return (0);
724 	}
725 	val[len] = '\0';
726 	p = val;
727 	ctltype = (kind & CTLTYPE);
728 	sign = ctl_sign[ctltype];
729 	intlen = ctl_size[ctltype];
730 
731 	switch (ctltype) {
732 	case CTLTYPE_STRING:
733 		if (!nflag)
734 			printf("%s%s", name, sep);
735 		printf("%.*s", (int)len, p);
736 		free(oval);
737 		return (0);
738 
739 	case CTLTYPE_INT:
740 	case CTLTYPE_UINT:
741 	case CTLTYPE_LONG:
742 	case CTLTYPE_ULONG:
743 	case CTLTYPE_S64:
744 	case CTLTYPE_U64:
745 		if (!nflag)
746 			printf("%s%s", name, sep);
747 		hexlen = 2 + (intlen * CHAR_BIT + 3) / 4;
748 		sep1 = "";
749 		while (len >= intlen) {
750 			switch (kind & CTLTYPE) {
751 			case CTLTYPE_INT:
752 			case CTLTYPE_UINT:
753 				umv = *(u_int *)p;
754 				mv = *(int *)p;
755 				break;
756 			case CTLTYPE_LONG:
757 			case CTLTYPE_ULONG:
758 				umv = *(u_long *)p;
759 				mv = *(long *)p;
760 				break;
761 			case CTLTYPE_S64:
762 			case CTLTYPE_U64:
763 				umv = *(uint64_t *)p;
764 				mv = *(int64_t *)p;
765 				break;
766 			}
767 			fputs(sep1, stdout);
768 			if (xflag)
769 				printf("%#0*jx", hexlen, umv);
770 			else if (!sign)
771 				printf(hflag ? "%'ju" : "%ju", umv);
772 			else if (fmt[1] == 'K') {
773 				if (mv < 0)
774 					printf("%jd", mv);
775 				else
776 					printf("%.1fC", (mv - 2732.0) / 10);
777 			} else
778 				printf(hflag ? "%'jd" : "%jd", mv);
779 			sep1 = " ";
780 			len -= intlen;
781 			p += intlen;
782 		}
783 		free(oval);
784 		return (0);
785 
786 	case CTLTYPE_OPAQUE:
787 		i = 0;
788 		if (strcmp(fmt, "S,clockinfo") == 0)
789 			func = S_clockinfo;
790 		else if (strcmp(fmt, "S,timeval") == 0)
791 			func = S_timeval;
792 		else if (strcmp(fmt, "S,loadavg") == 0)
793 			func = S_loadavg;
794 		else if (strcmp(fmt, "S,vmtotal") == 0)
795 			func = S_vmtotal;
796 		else
797 			func = NULL;
798 		if (func) {
799 			if (!nflag)
800 				printf("%s%s", name, sep);
801 			i = (*func)(len, p);
802 			free(oval);
803 			return (i);
804 		}
805 		/* FALLTHROUGH */
806 	default:
807 		if (!oflag && !xflag) {
808 			free(oval);
809 			return (1);
810 		}
811 		if (!nflag)
812 			printf("%s%s", name, sep);
813 		printf("Format:%s Length:%zu Dump:0x", fmt, len);
814 		while (len-- && (xflag || p < val + 16))
815 			printf("%02x", *p++);
816 		if (!xflag && len > 16)
817 			printf("...");
818 		free(oval);
819 		return (0);
820 	}
821 	free(oval);
822 	return (1);
823 }
824 
825 static int
826 sysctl_all(int *oid, int len)
827 {
828 	int name1[22], name2[22];
829 	int i, j;
830 	size_t l1, l2;
831 
832 	name1[0] = 0;
833 	name1[1] = 2;
834 	l1 = 2;
835 	if (len) {
836 		memcpy(name1+2, oid, len * sizeof(int));
837 		l1 += len;
838 	} else {
839 		name1[2] = 1;
840 		l1++;
841 	}
842 	for (;;) {
843 		l2 = sizeof(name2);
844 		j = sysctl(name1, l1, name2, &l2, 0, 0);
845 		if (j < 0) {
846 			if (errno == ENOENT)
847 				return (0);
848 			else
849 				err(1, "sysctl(getnext) %d %zu", j, l2);
850 		}
851 
852 		l2 /= sizeof(int);
853 
854 		if (len < 0 || l2 < (unsigned int)len)
855 			return (0);
856 
857 		for (i = 0; i < len; i++)
858 			if (name2[i] != oid[i])
859 				return (0);
860 
861 		i = show_var(name2, l2);
862 		if (!i && !bflag)
863 			putchar('\n');
864 
865 		memcpy(name1+2, name2, l2 * sizeof(int));
866 		l1 = 2 + l2;
867 	}
868 }
869