sysctl.c revision 306316 
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
31static 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
38static char sccsid[] = "@(#)from: sysctl.c	8.1 (Berkeley) 6/6/93";
39#endif
40static const char rcsid[] =
41  "$FreeBSD: stable/11/sbin/sysctl/sysctl.c 306316 2016-09-25 17:57:52Z kib $";
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#ifdef __amd64__
52#include <sys/efi.h>
53#include <machine/metadata.h>
54#endif
55
56#if defined(__amd64__) || defined(__i386__)
57#include <machine/pc/bios.h>
58#endif
59
60#include <assert.h>
61#include <ctype.h>
62#include <err.h>
63#include <errno.h>
64#include <inttypes.h>
65#include <locale.h>
66#include <stdio.h>
67#include <stdlib.h>
68#include <string.h>
69#include <sysexits.h>
70#include <unistd.h>
71
72static const char *conffile;
73
74static int	aflag, bflag, Bflag, dflag, eflag, hflag, iflag;
75static int	Nflag, nflag, oflag, qflag, tflag, Tflag, Wflag, xflag;
76
77static int	oidfmt(int *, int, char *, u_int *);
78static int	parsefile(const char *);
79static int	parse(const char *, int);
80static int	show_var(int *, int);
81static int	sysctl_all(int *oid, int len);
82static int	name2oid(const char *, int *);
83
84static int	strIKtoi(const char *, char **, const char *);
85
86static int ctl_sign[CTLTYPE+1] = {
87	[CTLTYPE_INT] = 1,
88	[CTLTYPE_LONG] = 1,
89	[CTLTYPE_S8] = 1,
90	[CTLTYPE_S16] = 1,
91	[CTLTYPE_S32] = 1,
92	[CTLTYPE_S64] = 1,
93};
94
95static int ctl_size[CTLTYPE+1] = {
96	[CTLTYPE_INT] = sizeof(int),
97	[CTLTYPE_UINT] = sizeof(u_int),
98	[CTLTYPE_LONG] = sizeof(long),
99	[CTLTYPE_ULONG] = sizeof(u_long),
100	[CTLTYPE_S8] = sizeof(int8_t),
101	[CTLTYPE_S16] = sizeof(int16_t),
102	[CTLTYPE_S32] = sizeof(int32_t),
103	[CTLTYPE_S64] = sizeof(int64_t),
104	[CTLTYPE_U8] = sizeof(uint8_t),
105	[CTLTYPE_U16] = sizeof(uint16_t),
106	[CTLTYPE_U32] = sizeof(uint32_t),
107	[CTLTYPE_U64] = sizeof(uint64_t),
108};
109
110static const char *ctl_typename[CTLTYPE+1] = {
111	[CTLTYPE_INT] = "integer",
112	[CTLTYPE_UINT] = "unsigned integer",
113	[CTLTYPE_LONG] = "long integer",
114	[CTLTYPE_ULONG] = "unsigned long",
115	[CTLTYPE_U8] = "uint8_t",
116	[CTLTYPE_U16] = "uint16_t",
117	[CTLTYPE_U32] = "uint16_t",
118	[CTLTYPE_U64] = "uint64_t",
119	[CTLTYPE_S8] = "int8_t",
120	[CTLTYPE_S16] = "int16_t",
121	[CTLTYPE_S32] = "int32_t",
122	[CTLTYPE_S64] = "int64_t",
123	[CTLTYPE_NODE] = "node",
124	[CTLTYPE_STRING] = "string",
125	[CTLTYPE_OPAQUE] = "opaque",
126};
127
128static void
129usage(void)
130{
131
132	(void)fprintf(stderr, "%s\n%s\n",
133	    "usage: sysctl [-bdehiNnoqTtWx] [ -B <bufsize> ] [-f filename] name[=value] ...",
134	    "       sysctl [-bdehNnoqTtWx] [ -B <bufsize> ] -a");
135	exit(1);
136}
137
138int
139main(int argc, char **argv)
140{
141	int ch;
142	int warncount = 0;
143
144	setlocale(LC_NUMERIC, "");
145	setbuf(stdout,0);
146	setbuf(stderr,0);
147
148	while ((ch = getopt(argc, argv, "AabB:def:hiNnoqtTwWxX")) != -1) {
149		switch (ch) {
150		case 'A':
151			/* compatibility */
152			aflag = oflag = 1;
153			break;
154		case 'a':
155			aflag = 1;
156			break;
157		case 'b':
158			bflag = 1;
159			break;
160		case 'B':
161			Bflag = strtol(optarg, NULL, 0);
162			break;
163		case 'd':
164			dflag = 1;
165			break;
166		case 'e':
167			eflag = 1;
168			break;
169		case 'f':
170			conffile = optarg;
171			break;
172		case 'h':
173			hflag = 1;
174			break;
175		case 'i':
176			iflag = 1;
177			break;
178		case 'N':
179			Nflag = 1;
180			break;
181		case 'n':
182			nflag = 1;
183			break;
184		case 'o':
185			oflag = 1;
186			break;
187		case 'q':
188			qflag = 1;
189			break;
190		case 't':
191			tflag = 1;
192			break;
193		case 'T':
194			Tflag = 1;
195			break;
196		case 'w':
197			/* compatibility */
198			/* ignored */
199			break;
200		case 'W':
201			Wflag = 1;
202			break;
203		case 'X':
204			/* compatibility */
205			aflag = xflag = 1;
206			break;
207		case 'x':
208			xflag = 1;
209			break;
210		default:
211			usage();
212		}
213	}
214	argc -= optind;
215	argv += optind;
216
217	if (Nflag && nflag)
218		usage();
219	if (aflag && argc == 0)
220		exit(sysctl_all(0, 0));
221	if (argc == 0 && conffile == NULL)
222		usage();
223
224	warncount = 0;
225	if (conffile != NULL)
226		warncount += parsefile(conffile);
227
228	while (argc-- > 0)
229		warncount += parse(*argv++, 0);
230
231	return (warncount);
232}
233
234/*
235 * Parse a name into a MIB entry.
236 * Lookup and print out the MIB entry if it exists.
237 * Set a new value if requested.
238 */
239static int
240parse(const char *string, int lineno)
241{
242	int len, i, j;
243	const void *newval;
244	const char *newvalstr = NULL;
245	int8_t i8val;
246	uint8_t u8val;
247	int16_t i16val;
248	uint16_t u16val;
249	int32_t i32val;
250	uint32_t u32val;
251	int intval;
252	unsigned int uintval;
253	long longval;
254	unsigned long ulongval;
255	size_t newsize = Bflag;
256	int64_t i64val;
257	uint64_t u64val;
258	int mib[CTL_MAXNAME];
259	char *cp, *bufp, buf[BUFSIZ], *endptr = NULL, fmt[BUFSIZ], line[BUFSIZ];
260	u_int kind;
261
262	if (lineno)
263		snprintf(line, sizeof(line), " at line %d", lineno);
264	else
265		line[0] = '\0';
266
267	cp = buf;
268	if (snprintf(buf, BUFSIZ, "%s", string) >= BUFSIZ) {
269		warnx("oid too long: '%s'%s", string, line);
270		return (1);
271	}
272	bufp = strsep(&cp, "=:");
273	if (cp != NULL) {
274		/* Tflag just lists tunables, do not allow assignment */
275		if (Tflag || Wflag) {
276			warnx("Can't set variables when using -T or -W");
277			usage();
278		}
279		while (isspace(*cp))
280			cp++;
281		/* Strip a pair of " or ' if any. */
282		switch (*cp) {
283		case '\"':
284		case '\'':
285			if (cp[strlen(cp) - 1] == *cp)
286				cp[strlen(cp) - 1] = '\0';
287			cp++;
288		}
289		newvalstr = cp;
290		newsize = strlen(cp);
291	}
292	/* Trim spaces */
293	cp = bufp + strlen(bufp) - 1;
294	while (cp >= bufp && isspace((int)*cp)) {
295		*cp = '\0';
296		cp--;
297	}
298	len = name2oid(bufp, mib);
299
300	if (len < 0) {
301		if (iflag)
302			return (0);
303		if (qflag)
304			return (1);
305		else {
306			if (errno == ENOENT) {
307				warnx("unknown oid '%s'%s", bufp, line);
308			} else {
309				warn("unknown oid '%s'%s", bufp, line);
310			}
311			return (1);
312		}
313	}
314
315	if (oidfmt(mib, len, fmt, &kind)) {
316		warn("couldn't find format of oid '%s'%s", bufp, line);
317		if (iflag)
318			return (1);
319		else
320			exit(1);
321	}
322
323	if (newvalstr == NULL || dflag) {
324		if ((kind & CTLTYPE) == CTLTYPE_NODE) {
325			if (dflag) {
326				i = show_var(mib, len);
327				if (!i && !bflag)
328					putchar('\n');
329			}
330			sysctl_all(mib, len);
331		} else {
332			i = show_var(mib, len);
333			if (!i && !bflag)
334				putchar('\n');
335		}
336	} else {
337		if ((kind & CTLTYPE) == CTLTYPE_NODE) {
338			warnx("oid '%s' isn't a leaf node%s", bufp, line);
339			return (1);
340		}
341
342		if (!(kind & CTLFLAG_WR)) {
343			if (kind & CTLFLAG_TUN) {
344				warnx("oid '%s' is a read only tunable%s", bufp, line);
345				warnx("Tunable values are set in /boot/loader.conf");
346			} else
347				warnx("oid '%s' is read only%s", bufp, line);
348			return (1);
349		}
350
351		switch (kind & CTLTYPE) {
352		case CTLTYPE_INT:
353		case CTLTYPE_UINT:
354		case CTLTYPE_LONG:
355		case CTLTYPE_ULONG:
356		case CTLTYPE_S8:
357		case CTLTYPE_S16:
358		case CTLTYPE_S32:
359		case CTLTYPE_S64:
360		case CTLTYPE_U8:
361		case CTLTYPE_U16:
362		case CTLTYPE_U32:
363		case CTLTYPE_U64:
364			if (strlen(newvalstr) == 0) {
365				warnx("empty numeric value");
366				return (1);
367			}
368			/* FALLTHROUGH */
369		case CTLTYPE_STRING:
370			break;
371		default:
372			warnx("oid '%s' is type %d,"
373				" cannot set that%s", bufp,
374				kind & CTLTYPE, line);
375			return (1);
376		}
377
378		errno = 0;
379
380		switch (kind & CTLTYPE) {
381			case CTLTYPE_INT:
382				if (strncmp(fmt, "IK", 2) == 0)
383					intval = strIKtoi(newvalstr, &endptr, fmt);
384				else
385					intval = (int)strtol(newvalstr, &endptr,
386					    0);
387				newval = &intval;
388				newsize = sizeof(intval);
389				break;
390			case CTLTYPE_UINT:
391				uintval = (int) strtoul(newvalstr, &endptr, 0);
392				newval = &uintval;
393				newsize = sizeof(uintval);
394				break;
395			case CTLTYPE_LONG:
396				longval = strtol(newvalstr, &endptr, 0);
397				newval = &longval;
398				newsize = sizeof(longval);
399				break;
400			case CTLTYPE_ULONG:
401				ulongval = strtoul(newvalstr, &endptr, 0);
402				newval = &ulongval;
403				newsize = sizeof(ulongval);
404				break;
405			case CTLTYPE_STRING:
406				newval = newvalstr;
407				break;
408			case CTLTYPE_S8:
409				i8val = (int8_t)strtol(newvalstr, &endptr, 0);
410				newval = &i8val;
411				newsize = sizeof(i8val);
412				break;
413			case CTLTYPE_S16:
414				i16val = (int16_t)strtol(newvalstr, &endptr,
415				    0);
416				newval = &i16val;
417				newsize = sizeof(i16val);
418				break;
419			case CTLTYPE_S32:
420				i32val = (int32_t)strtol(newvalstr, &endptr,
421				    0);
422				newval = &i32val;
423				newsize = sizeof(i32val);
424				break;
425			case CTLTYPE_S64:
426				i64val = strtoimax(newvalstr, &endptr, 0);
427				newval = &i64val;
428				newsize = sizeof(i64val);
429				break;
430			case CTLTYPE_U8:
431				u8val = (uint8_t)strtoul(newvalstr, &endptr, 0);
432				newval = &u8val;
433				newsize = sizeof(u8val);
434				break;
435			case CTLTYPE_U16:
436				u16val = (uint16_t)strtoul(newvalstr, &endptr,
437				    0);
438				newval = &u16val;
439				newsize = sizeof(u16val);
440				break;
441			case CTLTYPE_U32:
442				u32val = (uint32_t)strtoul(newvalstr, &endptr,
443				    0);
444				newval = &u32val;
445				newsize = sizeof(u32val);
446				break;
447			case CTLTYPE_U64:
448				u64val = strtoumax(newvalstr, &endptr, 0);
449				newval = &u64val;
450				newsize = sizeof(u64val);
451				break;
452			default:
453				/* NOTREACHED */
454				abort();
455		}
456
457		if (errno != 0 || endptr == newvalstr ||
458		    (endptr != NULL && *endptr != '\0')) {
459			warnx("invalid %s '%s'%s", ctl_typename[kind & CTLTYPE],
460			    newvalstr, line);
461			return (1);
462		}
463
464		i = show_var(mib, len);
465		if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
466			if (!i && !bflag)
467				putchar('\n');
468			switch (errno) {
469			case EOPNOTSUPP:
470				warnx("%s: value is not available%s",
471					string, line);
472				return (1);
473			case ENOTDIR:
474				warnx("%s: specification is incomplete%s",
475					string, line);
476				return (1);
477			case ENOMEM:
478				warnx("%s: type is unknown to this program%s",
479					string, line);
480				return (1);
481			default:
482				warn("%s%s", string, line);
483				return (1);
484			}
485		}
486		if (!bflag)
487			printf(" -> ");
488		i = nflag;
489		nflag = 1;
490		j = show_var(mib, len);
491		if (!j && !bflag)
492			putchar('\n');
493		nflag = i;
494	}
495
496	return (0);
497}
498
499static int
500parsefile(const char *filename)
501{
502	FILE *file;
503	char line[BUFSIZ], *p, *pq, *pdq;
504	int warncount = 0, lineno = 0;
505
506	file = fopen(filename, "r");
507	if (file == NULL)
508		err(EX_NOINPUT, "%s", filename);
509	while (fgets(line, sizeof(line), file) != NULL) {
510		lineno++;
511		p = line;
512		pq = strchr(line, '\'');
513		pdq = strchr(line, '\"');
514		/* Replace the first # with \0. */
515		while((p = strchr(p, '#')) != NULL) {
516			if (pq != NULL && p > pq) {
517				if ((p = strchr(pq+1, '\'')) != NULL)
518					*(++p) = '\0';
519				break;
520			} else if (pdq != NULL && p > pdq) {
521				if ((p = strchr(pdq+1, '\"')) != NULL)
522					*(++p) = '\0';
523				break;
524			} else if (p == line || *(p-1) != '\\') {
525				*p = '\0';
526				break;
527			}
528			p++;
529		}
530		/* Trim spaces */
531		p = line + strlen(line) - 1;
532		while (p >= line && isspace((int)*p)) {
533			*p = '\0';
534			p--;
535		}
536		p = line;
537		while (isspace((int)*p))
538			p++;
539		if (*p == '\0')
540			continue;
541		else
542			warncount += parse(p, lineno);
543	}
544	fclose(file);
545
546	return (warncount);
547}
548
549/* These functions will dump out various interesting structures. */
550
551static int
552S_clockinfo(size_t l2, void *p)
553{
554	struct clockinfo *ci = (struct clockinfo*)p;
555
556	if (l2 != sizeof(*ci)) {
557		warnx("S_clockinfo %zu != %zu", l2, sizeof(*ci));
558		return (1);
559	}
560	printf(hflag ? "{ hz = %'d, tick = %'d, profhz = %'d, stathz = %'d }" :
561		"{ hz = %d, tick = %d, profhz = %d, stathz = %d }",
562		ci->hz, ci->tick, ci->profhz, ci->stathz);
563	return (0);
564}
565
566static int
567S_loadavg(size_t l2, void *p)
568{
569	struct loadavg *tv = (struct loadavg*)p;
570
571	if (l2 != sizeof(*tv)) {
572		warnx("S_loadavg %zu != %zu", l2, sizeof(*tv));
573		return (1);
574	}
575	printf(hflag ? "{ %'.2f %'.2f %'.2f }" : "{ %.2f %.2f %.2f }",
576		(double)tv->ldavg[0]/(double)tv->fscale,
577		(double)tv->ldavg[1]/(double)tv->fscale,
578		(double)tv->ldavg[2]/(double)tv->fscale);
579	return (0);
580}
581
582static int
583S_timeval(size_t l2, void *p)
584{
585	struct timeval *tv = (struct timeval*)p;
586	time_t tv_sec;
587	char *p1, *p2;
588
589	if (l2 != sizeof(*tv)) {
590		warnx("S_timeval %zu != %zu", l2, sizeof(*tv));
591		return (1);
592	}
593	printf(hflag ? "{ sec = %'jd, usec = %'ld } " :
594		"{ sec = %jd, usec = %ld } ",
595		(intmax_t)tv->tv_sec, tv->tv_usec);
596	tv_sec = tv->tv_sec;
597	p1 = strdup(ctime(&tv_sec));
598	for (p2=p1; *p2 ; p2++)
599		if (*p2 == '\n')
600			*p2 = '\0';
601	fputs(p1, stdout);
602	free(p1);
603	return (0);
604}
605
606static int
607S_vmtotal(size_t l2, void *p)
608{
609	struct vmtotal *v = (struct vmtotal *)p;
610	int pageKilo = getpagesize() / 1024;
611
612	if (l2 != sizeof(*v)) {
613		warnx("S_vmtotal %zu != %zu", l2, sizeof(*v));
614		return (1);
615	}
616
617	printf(
618	    "\nSystem wide totals computed every five seconds:"
619	    " (values in kilobytes)\n");
620	printf("===============================================\n");
621	printf(
622	    "Processes:\t\t(RUNQ: %hd Disk Wait: %hd Page Wait: "
623	    "%hd Sleep: %hd)\n",
624	    v->t_rq, v->t_dw, v->t_pw, v->t_sl);
625	printf(
626	    "Virtual Memory:\t\t(Total: %jdK Active: %jdK)\n",
627	    (intmax_t)v->t_vm * pageKilo, (intmax_t)v->t_avm * pageKilo);
628	printf("Real Memory:\t\t(Total: %jdK Active: %jdK)\n",
629	    (intmax_t)v->t_rm * pageKilo, (intmax_t)v->t_arm * pageKilo);
630	printf("Shared Virtual Memory:\t(Total: %jdK Active: %jdK)\n",
631	    (intmax_t)v->t_vmshr * pageKilo, (intmax_t)v->t_avmshr * pageKilo);
632	printf("Shared Real Memory:\t(Total: %jdK Active: %jdK)\n",
633	    (intmax_t)v->t_rmshr * pageKilo, (intmax_t)v->t_armshr * pageKilo);
634	printf("Free Memory:\t%jdK", (intmax_t)v->t_free * pageKilo);
635
636	return (0);
637}
638
639#ifdef __amd64__
640static int
641S_efi_map(size_t l2, void *p)
642{
643	struct efi_map_header *efihdr;
644	struct efi_md *map;
645	const char *type;
646	size_t efisz;
647	int ndesc, i;
648
649	static const char *types[] = {
650		"Reserved",
651		"LoaderCode",
652		"LoaderData",
653		"BootServicesCode",
654		"BootServicesData",
655		"RuntimeServicesCode",
656		"RuntimeServicesData",
657		"ConventionalMemory",
658		"UnusableMemory",
659		"ACPIReclaimMemory",
660		"ACPIMemoryNVS",
661		"MemoryMappedIO",
662		"MemoryMappedIOPortSpace",
663		"PalCode"
664	};
665
666	/*
667	 * Memory map data provided by UEFI via the GetMemoryMap
668	 * Boot Services API.
669	 */
670	if (l2 < sizeof(*efihdr)) {
671		warnx("S_efi_map length less than header");
672		return (1);
673	}
674	efihdr = p;
675	efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
676	map = (struct efi_md *)((uint8_t *)efihdr + efisz);
677
678	if (efihdr->descriptor_size == 0)
679		return (0);
680	if (l2 != efisz + efihdr->memory_size) {
681		warnx("S_efi_map length mismatch %zu vs %zu", l2, efisz +
682		    efihdr->memory_size);
683		return (1);
684	}
685	ndesc = efihdr->memory_size / efihdr->descriptor_size;
686
687	printf("\n%23s %12s %12s %8s %4s",
688	    "Type", "Physical", "Virtual", "#Pages", "Attr");
689
690	for (i = 0; i < ndesc; i++,
691	    map = efi_next_descriptor(map, efihdr->descriptor_size)) {
692		if (map->md_type <= EFI_MD_TYPE_PALCODE)
693			type = types[map->md_type];
694		else
695			type = "<INVALID>";
696		printf("\n%23s %012lx %12p %08lx ", type, map->md_phys,
697		    map->md_virt, map->md_pages);
698		if (map->md_attr & EFI_MD_ATTR_UC)
699			printf("UC ");
700		if (map->md_attr & EFI_MD_ATTR_WC)
701			printf("WC ");
702		if (map->md_attr & EFI_MD_ATTR_WT)
703			printf("WT ");
704		if (map->md_attr & EFI_MD_ATTR_WB)
705			printf("WB ");
706		if (map->md_attr & EFI_MD_ATTR_UCE)
707			printf("UCE ");
708		if (map->md_attr & EFI_MD_ATTR_WP)
709			printf("WP ");
710		if (map->md_attr & EFI_MD_ATTR_RP)
711			printf("RP ");
712		if (map->md_attr & EFI_MD_ATTR_XP)
713			printf("XP ");
714		if (map->md_attr & EFI_MD_ATTR_RT)
715			printf("RUNTIME");
716	}
717	return (0);
718}
719#endif
720
721#if defined(__amd64__) || defined(__i386__)
722static int
723S_bios_smap_xattr(size_t l2, void *p)
724{
725	struct bios_smap_xattr *smap, *end;
726
727	if (l2 % sizeof(*smap) != 0) {
728		warnx("S_bios_smap_xattr %zu is not a multiple of %zu", l2,
729		    sizeof(*smap));
730		return (1);
731	}
732
733	end = (struct bios_smap_xattr *)((char *)p + l2);
734	for (smap = p; smap < end; smap++)
735		printf("\nSMAP type=%02x, xattr=%02x, base=%016jx, len=%016jx",
736		    smap->type, smap->xattr, (uintmax_t)smap->base,
737		    (uintmax_t)smap->length);
738	return (0);
739}
740#endif
741
742static int
743strIKtoi(const char *str, char **endptrp, const char *fmt)
744{
745	int kelv;
746	float temp;
747	size_t len;
748	const char *p;
749	int prec, i;
750
751	assert(errno == 0);
752
753	len = strlen(str);
754	/* caller already checked this */
755	assert(len > 0);
756
757	/*
758	 * A format of "IK" is in deciKelvin. A format of "IK3" is in
759	 * milliKelvin. The single digit following IK is log10 of the
760	 * multiplying factor to convert Kelvin into the untis of this sysctl,
761	 * or the dividing factor to convert the sysctl value to Kelvin. Numbers
762	 * larger than 6 will run into precision issues with 32-bit integers.
763	 * Characters that aren't ASCII digits after the 'K' are ignored. No
764	 * localization is present because this is an interface from the kernel
765	 * to this program (eg not an end-user interface), so isdigit() isn't
766	 * used here.
767	 */
768	if (fmt[2] != '\0' && fmt[2] >= '0' && fmt[2] <= '9')
769		prec = fmt[2] - '0';
770	else
771		prec = 1;
772	p = &str[len - 1];
773	if (*p == 'C' || *p == 'F' || *p == 'K') {
774		temp = strtof(str, endptrp);
775		if (*endptrp != str && *endptrp == p && errno == 0) {
776			if (*p == 'F')
777				temp = (temp - 32) * 5 / 9;
778			*endptrp = NULL;
779			if (*p != 'K')
780				temp += 273.15;
781			for (i = 0; i < prec; i++)
782				temp *= 10.0;
783			return ((int)(temp + 0.5));
784		}
785	} else {
786		/* No unit specified -> treat it as a raw number */
787		kelv = (int)strtol(str, endptrp, 10);
788		if (*endptrp != str && *endptrp == p && errno == 0) {
789			*endptrp = NULL;
790			return (kelv);
791		}
792	}
793
794	errno = ERANGE;
795	return (0);
796}
797
798/*
799 * These functions uses a presently undocumented interface to the kernel
800 * to walk the tree and get the type so it can print the value.
801 * This interface is under work and consideration, and should probably
802 * be killed with a big axe by the first person who can find the time.
803 * (be aware though, that the proper interface isn't as obvious as it
804 * may seem, there are various conflicting requirements.
805 */
806
807static int
808name2oid(const char *name, int *oidp)
809{
810	int oid[2];
811	int i;
812	size_t j;
813
814	oid[0] = 0;
815	oid[1] = 3;
816
817	j = CTL_MAXNAME * sizeof(int);
818	i = sysctl(oid, 2, oidp, &j, name, strlen(name));
819	if (i < 0)
820		return (i);
821	j /= sizeof(int);
822	return (j);
823}
824
825static int
826oidfmt(int *oid, int len, char *fmt, u_int *kind)
827{
828	int qoid[CTL_MAXNAME+2];
829	u_char buf[BUFSIZ];
830	int i;
831	size_t j;
832
833	qoid[0] = 0;
834	qoid[1] = 4;
835	memcpy(qoid + 2, oid, len * sizeof(int));
836
837	j = sizeof(buf);
838	i = sysctl(qoid, len + 2, buf, &j, 0, 0);
839	if (i)
840		err(1, "sysctl fmt %d %zu %d", i, j, errno);
841
842	if (kind)
843		*kind = *(u_int *)buf;
844
845	if (fmt)
846		strcpy(fmt, (char *)(buf + sizeof(u_int)));
847	return (0);
848}
849
850/*
851 * This formats and outputs the value of one variable
852 *
853 * Returns zero if anything was actually output.
854 * Returns one if didn't know what to do with this.
855 * Return minus one if we had errors.
856 */
857static int
858show_var(int *oid, int nlen)
859{
860	u_char buf[BUFSIZ], *val, *oval, *p;
861	char name[BUFSIZ], fmt[BUFSIZ];
862	const char *sep, *sep1, *prntype;
863	int qoid[CTL_MAXNAME+2];
864	uintmax_t umv;
865	intmax_t mv;
866	int i, hexlen, sign, ctltype;
867	size_t intlen;
868	size_t j, len;
869	u_int kind;
870	float base;
871	int (*func)(size_t, void *);
872	int prec;
873
874	/* Silence GCC. */
875	umv = mv = intlen = 0;
876
877	bzero(buf, BUFSIZ);
878	bzero(fmt, BUFSIZ);
879	bzero(name, BUFSIZ);
880	qoid[0] = 0;
881	memcpy(qoid + 2, oid, nlen * sizeof(int));
882
883	qoid[1] = 1;
884	j = sizeof(name);
885	i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
886	if (i || !j)
887		err(1, "sysctl name %d %zu %d", i, j, errno);
888
889	oidfmt(oid, nlen, fmt, &kind);
890	/* if Wflag then only list sysctls that are writeable and not stats. */
891	if (Wflag && ((kind & CTLFLAG_WR) == 0 || (kind & CTLFLAG_STATS) != 0))
892		return 1;
893
894	/* if Tflag then only list sysctls that are tuneables. */
895	if (Tflag && (kind & CTLFLAG_TUN) == 0)
896		return 1;
897
898	if (Nflag) {
899		printf("%s", name);
900		return (0);
901	}
902
903	if (eflag)
904		sep = "=";
905	else
906		sep = ": ";
907
908	ctltype = (kind & CTLTYPE);
909	if (tflag || dflag) {
910		if (!nflag)
911			printf("%s%s", name, sep);
912        	if (ctl_typename[ctltype] != NULL)
913            		prntype = ctl_typename[ctltype];
914        	else
915            		prntype = "unknown";
916		if (tflag && dflag)
917			printf("%s%s", prntype, sep);
918		else if (tflag) {
919			printf("%s", prntype);
920			return (0);
921		}
922		qoid[1] = 5;
923		j = sizeof(buf);
924		i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
925		printf("%s", buf);
926		return (0);
927	}
928	/* find an estimate of how much we need for this var */
929	if (Bflag)
930		j = Bflag;
931	else {
932		j = 0;
933		i = sysctl(oid, nlen, 0, &j, 0, 0);
934		j += j; /* we want to be sure :-) */
935	}
936
937	val = oval = malloc(j + 1);
938	if (val == NULL) {
939		warnx("malloc failed");
940		return (1);
941	}
942	len = j;
943	i = sysctl(oid, nlen, val, &len, 0, 0);
944	if (i != 0 || (len == 0 && ctltype != CTLTYPE_STRING)) {
945		free(oval);
946		return (1);
947	}
948
949	if (bflag) {
950		fwrite(val, 1, len, stdout);
951		free(oval);
952		return (0);
953	}
954	val[len] = '\0';
955	p = val;
956	sign = ctl_sign[ctltype];
957	intlen = ctl_size[ctltype];
958
959	switch (ctltype) {
960	case CTLTYPE_STRING:
961		if (!nflag)
962			printf("%s%s", name, sep);
963		printf("%.*s", (int)len, p);
964		free(oval);
965		return (0);
966
967	case CTLTYPE_INT:
968	case CTLTYPE_UINT:
969	case CTLTYPE_LONG:
970	case CTLTYPE_ULONG:
971	case CTLTYPE_S8:
972	case CTLTYPE_S16:
973	case CTLTYPE_S32:
974	case CTLTYPE_S64:
975	case CTLTYPE_U8:
976	case CTLTYPE_U16:
977	case CTLTYPE_U32:
978	case CTLTYPE_U64:
979		if (!nflag)
980			printf("%s%s", name, sep);
981		hexlen = 2 + (intlen * CHAR_BIT + 3) / 4;
982		sep1 = "";
983		while (len >= intlen) {
984			switch (kind & CTLTYPE) {
985			case CTLTYPE_INT:
986			case CTLTYPE_UINT:
987				umv = *(u_int *)p;
988				mv = *(int *)p;
989				break;
990			case CTLTYPE_LONG:
991			case CTLTYPE_ULONG:
992				umv = *(u_long *)p;
993				mv = *(long *)p;
994				break;
995			case CTLTYPE_S8:
996			case CTLTYPE_U8:
997				umv = *(uint8_t *)p;
998				mv = *(int8_t *)p;
999				break;
1000			case CTLTYPE_S16:
1001			case CTLTYPE_U16:
1002				umv = *(uint16_t *)p;
1003				mv = *(int16_t *)p;
1004				break;
1005			case CTLTYPE_S32:
1006			case CTLTYPE_U32:
1007				umv = *(uint32_t *)p;
1008				mv = *(int32_t *)p;
1009				break;
1010			case CTLTYPE_S64:
1011			case CTLTYPE_U64:
1012				umv = *(uint64_t *)p;
1013				mv = *(int64_t *)p;
1014				break;
1015			}
1016			fputs(sep1, stdout);
1017			if (xflag)
1018				printf("%#0*jx", hexlen, umv);
1019			else if (!sign)
1020				printf(hflag ? "%'ju" : "%ju", umv);
1021			else if (fmt[1] == 'K') {
1022				if (mv < 0)
1023					printf("%jd", mv);
1024				else {
1025					/*
1026					 * See strIKtoi for details on fmt.
1027					 */
1028					prec = 1;
1029					if (fmt[2] != '\0')
1030						prec = fmt[2] - '0';
1031					base = 1.0;
1032					for (int i = 0; i < prec; i++)
1033						base *= 10.0;
1034					printf("%.*fC", prec,
1035					    (float)mv / base - 273.15);
1036				}
1037			} else
1038				printf(hflag ? "%'jd" : "%jd", mv);
1039			sep1 = " ";
1040			len -= intlen;
1041			p += intlen;
1042		}
1043		free(oval);
1044		return (0);
1045
1046	case CTLTYPE_OPAQUE:
1047		i = 0;
1048		if (strcmp(fmt, "S,clockinfo") == 0)
1049			func = S_clockinfo;
1050		else if (strcmp(fmt, "S,timeval") == 0)
1051			func = S_timeval;
1052		else if (strcmp(fmt, "S,loadavg") == 0)
1053			func = S_loadavg;
1054		else if (strcmp(fmt, "S,vmtotal") == 0)
1055			func = S_vmtotal;
1056#ifdef __amd64__
1057		else if (strcmp(fmt, "S,efi_map_header") == 0)
1058			func = S_efi_map;
1059#endif
1060#if defined(__amd64__) || defined(__i386__)
1061		else if (strcmp(fmt, "S,bios_smap_xattr") == 0)
1062			func = S_bios_smap_xattr;
1063#endif
1064		else
1065			func = NULL;
1066		if (func) {
1067			if (!nflag)
1068				printf("%s%s", name, sep);
1069			i = (*func)(len, p);
1070			free(oval);
1071			return (i);
1072		}
1073		/* FALLTHROUGH */
1074	default:
1075		if (!oflag && !xflag) {
1076			free(oval);
1077			return (1);
1078		}
1079		if (!nflag)
1080			printf("%s%s", name, sep);
1081		printf("Format:%s Length:%zu Dump:0x", fmt, len);
1082		while (len-- && (xflag || p < val + 16))
1083			printf("%02x", *p++);
1084		if (!xflag && len > 16)
1085			printf("...");
1086		free(oval);
1087		return (0);
1088	}
1089	free(oval);
1090	return (1);
1091}
1092
1093static int
1094sysctl_all(int *oid, int len)
1095{
1096	int name1[22], name2[22];
1097	int i, j;
1098	size_t l1, l2;
1099
1100	name1[0] = 0;
1101	name1[1] = 2;
1102	l1 = 2;
1103	if (len) {
1104		memcpy(name1+2, oid, len * sizeof(int));
1105		l1 += len;
1106	} else {
1107		name1[2] = 1;
1108		l1++;
1109	}
1110	for (;;) {
1111		l2 = sizeof(name2);
1112		j = sysctl(name1, l1, name2, &l2, 0, 0);
1113		if (j < 0) {
1114			if (errno == ENOENT)
1115				return (0);
1116			else
1117				err(1, "sysctl(getnext) %d %zu", j, l2);
1118		}
1119
1120		l2 /= sizeof(int);
1121
1122		if (len < 0 || l2 < (unsigned int)len)
1123			return (0);
1124
1125		for (i = 0; i < len; i++)
1126			if (name2[i] != oid[i])
1127				return (0);
1128
1129		i = show_var(name2, l2);
1130		if (!i && !bflag)
1131			putchar('\n');
1132
1133		memcpy(name1+2, name2, l2 * sizeof(int));
1134		l1 = 2 + l2;
1135	}
1136}
1137