3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved.
34 * @(#)from: sysctl.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/sbin/sysctl/sysctl.c,v 1.25.2.11 2003/05/01 22:48:08 trhodes Exp $
36 * $DragonFly: src/sbin/sysctl/sysctl.c,v 1.13 2006/09/21 16:16:07 dillon Exp $
40 #include <sys/diskslice.h> /* used for bootdev parsing */
41 #include <sys/reboot.h> /* used for bootdev parsing */
43 #include <sys/types.h>
45 #include <sys/sysctl.h>
46 #include <sys/resource.h>
47 #include <sys/param.h>
49 #include <machine/inttypes.h>
59 static int aflag, bflag, dflag, eflag, Nflag, nflag, oflag, xflag;
61 static int oidfmt(int *, size_t, char *, u_int *);
62 static void parse(const char *);
63 static int show_var(int *, size_t);
64 static int sysctl_all(int *, size_t);
65 static void set_T_dev_t(const char *, void **, int *);
71 fprintf(stderr, "%s\n%s\n",
72 "usage: sysctl [-bdeNnox] variable[=value] ...",
73 " sysctl [-bdeNnox] -a");
78 main(int argc, char **argv)
84 while ((ch = getopt(argc, argv, "AabdeNnowxX")) != -1) {
131 if (aflag && argc == 0)
132 exit(sysctl_all(0, 0));
141 * Parse a name into a MIB entry.
142 * Lookup and print out the MIB entry if it exists.
143 * Set a new value if requested.
146 parse(const char *string)
152 unsigned int uintval;
154 unsigned long ulongval;
158 int mib[CTL_MAXNAME];
159 char *cp, fmt[BUFSIZ];
161 char *name_allocated = NULL;
164 if ((cp = strchr(string, '=')) != NULL) {
165 if ((name_allocated = malloc(cp - string + 1)) == NULL)
166 err(1, "malloc failed");
167 strlcpy(name_allocated, string, cp - string + 1);
168 name = name_allocated;
170 while (isspace(*++cp))
174 newsize = strlen(cp);
180 if (sysctlnametomib(name, mib, &len) < 0) {
181 if (errno == ENOENT) {
182 errx(1, "unknown oid '%s'", name);
184 err(1, "sysctlnametomib(\"%s\")", name);
188 if (oidfmt(mib, len, fmt, &kind))
189 err(1, "couldn't find format of oid '%s'", name);
191 if (newval == NULL) {
192 if ((kind & CTLTYPE) == CTLTYPE_NODE) {
193 sysctl_all(mib, len);
195 i = show_var(mib, len);
200 if ((kind & CTLTYPE) == CTLTYPE_NODE)
201 errx(1, "oid '%s' isn't a leaf node", name);
203 if (!(kind&CTLFLAG_WR))
204 errx(1, "oid '%s' is read only", name);
206 switch (kind & CTLTYPE) {
208 intval = (int) strtol(newval, NULL, 0);
210 newsize = sizeof(intval);
213 uintval = (int) strtoul(newval, NULL, 0);
215 newsize = sizeof uintval;
218 longval = strtol(newval, NULL, 0);
220 newsize = sizeof longval;
223 ulongval = strtoul(newval, NULL, 0);
225 newsize = sizeof ulongval;
230 quadval = strtoq(newval, NULL, 0);
232 newsize = sizeof(quadval);
235 uquadval = strtouq(newval, NULL, 0);
237 newsize = sizeof(quadval);
240 if (strcmp(fmt, "T,dev_t") == 0 ||
241 strcmp(fmt, "T,udev_t") == 0
243 set_T_dev_t((char*)newval, &newval,
249 errx(1, "oid '%s' is type %d,"
250 " cannot set that", name,
254 i = show_var(mib, len);
255 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
260 errx(1, "%s: value is not available",
263 errx(1, "%s: specification is incomplete",
266 errx(1, "%s: type is unknown to this program",
277 j = show_var(mib, len);
283 if (name_allocated != NULL)
284 free(name_allocated);
287 /* These functions will dump out various interesting structures. */
290 S_clockinfo(int l2, void *p)
292 struct clockinfo *ci = (struct clockinfo*)p;
293 if (l2 != sizeof(*ci))
294 err(1, "S_clockinfo %d != %d", l2, sizeof(*ci));
295 printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
296 ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
301 S_loadavg(int l2, void *p)
303 struct loadavg *tv = (struct loadavg*)p;
305 if (l2 != sizeof(*tv))
306 err(1, "S_loadavg %d != %d", l2, sizeof(*tv));
308 printf("{ %.2f %.2f %.2f }",
309 (double)tv->ldavg[0]/(double)tv->fscale,
310 (double)tv->ldavg[1]/(double)tv->fscale,
311 (double)tv->ldavg[2]/(double)tv->fscale);
316 S_timeval(int l2, void *p)
318 struct timeval *tv = (struct timeval*)p;
322 if (l2 != sizeof(*tv))
323 err(1, "S_timeval %d != %d", l2, sizeof(*tv));
324 printf("{ sec = %ld, usec = %ld } ",
325 tv->tv_sec, tv->tv_usec);
327 p1 = strdup(ctime(&tv_sec));
328 for (p2=p1; *p2 ; p2++)
336 T_dev_t(int l2, void *p)
338 dev_t *d = (dev_t *)p;
339 if (l2 != sizeof(*d))
340 err(1, "T_dev_T %d != %d", l2, sizeof(*d));
341 if ((int)(*d) != -1) {
342 if (minor(*d) > 255 || minor(*d) < 0)
343 printf("{ major = %d, minor = 0x%x }",
344 major(*d), minor(*d));
346 printf("{ major = %d, minor = %d }",
347 major(*d), minor(*d));
353 set_T_dev_t(const char *path, void **val, int *size)
355 static struct stat statb;
357 if (strcmp(path, "none") && strcmp(path, "off")) {
358 int rc = stat (path, &statb);
360 err(1, "cannot stat %s", path);
363 if (!S_ISCHR(statb.st_mode)) {
364 errx(1, "must specify a device special file.");
367 statb.st_rdev = NODEV;
369 *val = (char*) &statb.st_rdev;
370 *size = sizeof statb.st_rdev;
374 * These functions uses a presently undocumented interface to the kernel
375 * to walk the tree and get the type so it can print the value.
376 * This interface is under work and consideration, and should probably
377 * be killed with a big axe by the first person who can find the time.
378 * (be aware though, that the proper interface isn't as obvious as it
379 * may seem, there are various conflicting requirements.
383 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
385 int qoid[CTL_MAXNAME+2];
392 memcpy(qoid + 2, oid, len * sizeof(int));
395 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
397 err(1, "sysctl fmt %d %d %d", i, j, errno);
400 *kind = *(u_int *)buf;
403 strcpy(fmt, (char *)(buf + sizeof(u_int)));
409 * Code to map a bootdev major number into a suitable device name.
410 * Major numbers are mapped into names as in boot2.c
421 { -1, NULL } /* terminator */
425 machdep_bootdev(u_long value)
427 int majdev, unit, slice, part;
430 if ((value & B_MAGICMASK) != B_DEVMAGIC) {
431 printf("invalid (0x%08lx)", value);
434 majdev = B_TYPE(value);
435 unit = B_UNIT(value);
436 slice = B_SLICE(value);
437 part = B_PARTITION(value);
438 if (majdev == 2) { /* floppy, as known to the boot block... */
439 printf("/dev/fd%d", unit);
442 for (p = maj2name; p->name != NULL && p->majdev != majdev ; p++) ;
443 if (p->name != NULL) { /* found */
444 if (slice == WHOLE_DISK_SLICE)
445 printf("/dev/%s%d%c", p->name, unit, part);
447 printf("/dev/%s%ds%d%c",
448 p->name, unit, slice - BASE_SLICE + 1, part + 'a');
450 printf("unknown (major %d unit %d slice %d part %d)",
451 majdev, unit, slice, part);
457 * This formats and outputs the value of one variable
459 * Returns zero if anything was actually output.
460 * Returns one if didn't know what to do with this.
461 * Return minus one if we had errors.
465 show_var(int *oid, size_t nlen)
467 u_char buf[BUFSIZ], *val, *p, *nul;
468 char name[BUFSIZ], *fmt;
469 const char *sep, *spacer;
470 int qoid[CTL_MAXNAME+2];
474 int (*func)(int, void *);
477 memcpy(qoid + 2, oid, nlen * sizeof(int));
481 i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
483 err(1, "sysctl name %d %d %d", i, j, errno);
495 if (dflag) { /* just print description */
498 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
500 printf("%s%s", name, sep);
504 /* find an estimate of how much we need for this var */
506 i = sysctl(oid, nlen, 0, &j, 0, 0);
507 j += j; /* we want to be sure :-) */
511 i = sysctl(oid, nlen, val, &len, 0, 0);
516 fwrite(val, 1, len, stdout);
522 oidfmt(oid, nlen, fmt, &kind);
527 printf("%s%s", name, sep);
528 nul = memchr(p, '\0', len);
529 fwrite(p, nul == NULL ? len : nul - p, 1, stdout);
534 printf("%s%s", name, sep);
537 while (len >= sizeof(int)) {
539 printf("%s%u", spacer, *(unsigned int *)p);
541 printf("%s%d", spacer, *(int *)p);
550 printf("%s%s", name, sep);
553 if (!strcmp(name, "machdep.guessed_bootdev"))
554 return machdep_bootdev(*(unsigned long *)p);
557 while (len >= sizeof(long)) {
559 printf("%s%lu", spacer, *(unsigned long *)p);
561 printf("%s%ld", spacer, *(long *)p);
570 printf("%s%s", name, sep);
571 printf("%p", *(void **)p);
576 printf("%s%s", name, sep);
579 while (len >= sizeof(quad_t)) {
581 printf("%s%qu", spacer, *(u_quad_t *)p);
583 printf("%s%qd", spacer, *(quad_t *)p);
585 len -= sizeof(int64_t);
586 p += sizeof(int64_t);
592 if (!oflag && !xflag) {
594 if (strcmp(fmt, "S,clockinfo") == 0)
596 else if (strcmp(fmt, "S,timeval") == 0)
598 else if (strcmp(fmt, "S,loadavg") == 0)
600 else if (strcmp(fmt, "T,dev_t") == 0)
602 else if (strcmp(fmt, "T,udev_t") == 0)
608 printf("%s%s", name, sep);
609 return ((*func)(len, p));
614 if (!oflag && !xflag)
617 printf("%s%s", name, sep);
618 printf("Format:%s Length:%d Dump:0x", fmt, len);
619 while (len-- && (xflag || p < val + 16))
620 printf("%02x", *p++);
621 if (!xflag && len > 16)
629 sysctl_all(int *oid, size_t len)
631 int name1[22], name2[22];
639 memcpy(name1+2, oid, len * sizeof(int));
647 retval = sysctl(name1, l1, name2, &l2, 0, 0);
652 err(1, "sysctl(getnext) %d %d", retval, l2);
660 for (i = 0; i < len; i++)
661 if (name2[i] != oid[i])
664 retval = show_var(name2, l2);
665 if (retval == 0 && !bflag)
668 memcpy(name1+2, name2, l2 * sizeof(int));