3 * The Regents of the University of California. All rights reserved.
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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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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 1.16 2007/10/02 12:57:00 hasso 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/sensors.h>
48 #include <sys/param.h>
50 #include <machine/inttypes.h>
60 static int aflag, bflag, dflag, eflag, Nflag, nflag, oflag, xflag;
62 static int oidfmt(int *, size_t, char *, u_int *);
63 static void parse(const char *);
64 static int show_var(int *, size_t);
65 static int sysctl_all(int *, size_t);
66 static void set_T_dev_t(const char *, void **, size_t *);
67 static int set_IK(const char *, int *);
73 fprintf(stderr, "%s\n%s\n",
74 "usage: sysctl [-bdeNnox] variable[=value] ...",
75 " sysctl [-bdeNnox] -a");
80 main(int argc, char **argv)
86 while ((ch = getopt(argc, argv, "AabdeNnowxX")) != -1) {
133 if (aflag && argc == 0)
134 exit(sysctl_all(0, 0));
143 * Parse a name into a MIB entry.
144 * Lookup and print out the MIB entry if it exists.
145 * Set a new value if requested.
148 parse(const char *string)
154 unsigned int uintval;
156 unsigned long ulongval;
160 int mib[CTL_MAXNAME];
161 char *cp, fmt[BUFSIZ];
163 char *name_allocated = NULL;
166 if ((cp = strchr(string, '=')) != NULL) {
167 if ((name_allocated = malloc(cp - string + 1)) == NULL)
168 err(1, "malloc failed");
169 strlcpy(name_allocated, string, cp - string + 1);
170 name = name_allocated;
172 while (isspace(*++cp))
176 newsize = strlen(cp);
182 if (sysctlnametomib(name, mib, &len) < 0) {
183 if (errno == ENOENT) {
184 errx(1, "unknown oid '%s'", name);
186 err(1, "sysctlnametomib(\"%s\")", name);
190 if (oidfmt(mib, len, fmt, &kind))
191 err(1, "couldn't find format of oid '%s'", name);
193 if (newval == NULL) {
194 if ((kind & CTLTYPE) == CTLTYPE_NODE) {
195 sysctl_all(mib, len);
197 i = show_var(mib, len);
202 if ((kind & CTLTYPE) == CTLTYPE_NODE)
203 errx(1, "oid '%s' isn't a leaf node", name);
205 if (!(kind&CTLFLAG_WR))
206 errx(1, "oid '%s' is read only", name);
208 switch (kind & CTLTYPE) {
210 if (!strcmp(fmt, "IK") == 0) {
211 if (!set_IK(newval, &intval))
212 errx(1, "invalid value '%s'",
215 intval = (int) strtol(newval, NULL, 0);
217 newsize = sizeof(intval);
220 uintval = (int) strtoul(newval, NULL, 0);
222 newsize = sizeof uintval;
225 longval = strtol(newval, NULL, 0);
227 newsize = sizeof longval;
230 ulongval = strtoul(newval, NULL, 0);
232 newsize = sizeof ulongval;
237 quadval = strtoq(newval, NULL, 0);
239 newsize = sizeof(quadval);
242 uquadval = strtouq(newval, NULL, 0);
244 newsize = sizeof(quadval);
247 if (strcmp(fmt, "T,dev_t") == 0 ||
248 strcmp(fmt, "T,udev_t") == 0
250 set_T_dev_t((char*)newval, &newval,
256 errx(1, "oid '%s' is type %d,"
257 " cannot set that", name,
261 i = show_var(mib, len);
262 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
267 errx(1, "%s: value is not available",
270 errx(1, "%s: specification is incomplete",
273 errx(1, "%s: type is unknown to this program",
284 j = show_var(mib, len);
290 if (name_allocated != NULL)
291 free(name_allocated);
294 /* These functions will dump out various interesting structures. */
297 S_clockinfo(int l2, void *p)
299 struct clockinfo *ci = (struct clockinfo*)p;
300 if (l2 != sizeof(*ci))
301 err(1, "S_clockinfo %d != %zu", l2, sizeof(*ci));
302 printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
303 ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
308 S_loadavg(int l2, void *p)
310 struct loadavg *tv = (struct loadavg*)p;
312 if (l2 != sizeof(*tv))
313 err(1, "S_loadavg %d != %zu", l2, sizeof(*tv));
315 printf("{ %.2f %.2f %.2f }",
316 (double)tv->ldavg[0]/(double)tv->fscale,
317 (double)tv->ldavg[1]/(double)tv->fscale,
318 (double)tv->ldavg[2]/(double)tv->fscale);
323 S_timespec(int l2, void *p)
325 struct timespec *ts = (struct timespec*)p;
329 if (l2 != sizeof(*ts))
330 err(1, "S_timespec %d != %zu", l2, sizeof(*ts));
331 printf("{ sec = %ld, nsec = %ld } ",
332 ts->tv_sec, ts->tv_nsec);
334 p1 = strdup(ctime(&tv_sec));
335 for (p2=p1; *p2 ; p2++)
343 S_timeval(int l2, void *p)
345 struct timeval *tv = (struct timeval*)p;
349 if (l2 != sizeof(*tv))
350 err(1, "S_timeval %d != %zu", l2, sizeof(*tv));
351 printf("{ sec = %ld, usec = %ld } ",
352 tv->tv_sec, tv->tv_usec);
354 p1 = strdup(ctime(&tv_sec));
355 for (p2=p1; *p2 ; p2++)
363 S_sensor(int l2, void *p)
365 struct sensor *s = (struct sensor *)p;
367 if (l2 != sizeof(*s)) {
368 warnx("S_sensor %d != %zu", l2, sizeof(*s));
372 if (s->flags & SENSOR_FINVALID) {
374 * XXX: with this flag, the node should be entirely ignored,
375 * but as the magic-based sysctl(8) is not too flexible, we
376 * simply have to print out that the sensor is invalid.
382 if (s->flags & SENSOR_FUNKNOWN)
388 (s->value - 273150000) / 1000000.0);
391 printf("%jd RPM", (intmax_t)s->value);
393 case SENSOR_VOLTS_DC:
394 printf("%.2f VDC", s->value / 1000000.0);
397 printf("%.2f A", s->value / 1000000.0);
399 case SENSOR_WATTHOUR:
400 printf("%.2f Wh", s->value / 1000000.0);
403 printf("%.2f Ah", s->value / 1000000.0);
405 case SENSOR_INDICATOR:
406 printf("%s", s->value ? "On" : "Off");
409 printf("%jd", (intmax_t)s->value);
412 printf("%.2f%%", s->value / 1000.0);
415 printf("%.2f lx", s->value / 1000000.0);
422 case SENSOR_DRIVE_EMPTY:
425 case SENSOR_DRIVE_READY:
428 case SENSOR_DRIVE_POWERUP:
429 name = "powering up";
431 case SENSOR_DRIVE_ONLINE:
434 case SENSOR_DRIVE_IDLE:
437 case SENSOR_DRIVE_ACTIVE:
440 case SENSOR_DRIVE_REBUILD:
443 case SENSOR_DRIVE_POWERDOWN:
444 name = "powering down";
446 case SENSOR_DRIVE_FAIL:
449 case SENSOR_DRIVE_PFAIL:
459 case SENSOR_TIMEDELTA:
460 printf("%.6f secs", s->value / 1000000000.0);
467 if (s->desc[0] != '\0')
468 printf(" (%s)", s->desc);
471 case SENSOR_S_UNSPEC:
480 printf(", CRITICAL");
482 case SENSOR_S_UNKNOWN:
488 time_t t = s->tv.tv_sec;
493 printf(", %s.%03ld", ct, s->tv.tv_usec / 1000);
500 T_dev_t(int l2, void *p)
502 dev_t *d = (dev_t *)p;
503 if (l2 != sizeof(*d))
504 err(1, "T_dev_T %d != %zu", l2, sizeof(*d));
505 if ((int)(*d) != -1) {
506 if (minor(*d) > 255 || minor(*d) < 0)
507 printf("{ major = %d, minor = 0x%x }",
508 major(*d), minor(*d));
510 printf("{ major = %d, minor = %d }",
511 major(*d), minor(*d));
517 set_T_dev_t(const char *path, void **val, size_t *size)
519 static struct stat statb;
521 if (strcmp(path, "none") && strcmp(path, "off")) {
522 int rc = stat (path, &statb);
524 err(1, "cannot stat %s", path);
527 if (!S_ISCHR(statb.st_mode)) {
528 errx(1, "must specify a device special file.");
531 statb.st_rdev = NODEV;
533 *val = (char*) &statb.st_rdev;
534 *size = sizeof statb.st_rdev;
538 set_IK(const char *str, int *val)
545 if ((len = strlen(str)) == 0)
548 if (*p == 'C' || *p == 'F') {
549 temp = strtof(str, &endptr);
550 if (endptr == str || endptr != p)
553 temp = (temp - 32) * 5 / 9;
554 kelv = temp * 10 + 2732;
556 kelv = (int)strtol(str, &endptr, 10);
557 if (endptr == str || *endptr != '\0')
565 * These functions uses a presently undocumented interface to the kernel
566 * to walk the tree and get the type so it can print the value.
567 * This interface is under work and consideration, and should probably
568 * be killed with a big axe by the first person who can find the time.
569 * (be aware though, that the proper interface isn't as obvious as it
570 * may seem, there are various conflicting requirements.
574 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
576 int qoid[CTL_MAXNAME+2];
583 memcpy(qoid + 2, oid, len * sizeof(int));
586 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
588 err(1, "sysctl fmt %d %zu %d", i, j, errno);
591 *kind = *(u_int *)buf;
594 strcpy(fmt, (char *)(buf + sizeof(u_int)));
600 * Code to map a bootdev major number into a suitable device name.
601 * Major numbers are mapped into names as in boot2.c
612 { -1, NULL } /* terminator */
616 machdep_bootdev(u_long value)
618 int majdev, unit, slice, part;
621 if ((value & B_MAGICMASK) != B_DEVMAGIC) {
622 printf("invalid (0x%08lx)", value);
625 majdev = B_TYPE(value);
626 unit = B_UNIT(value);
627 slice = B_SLICE(value);
628 part = B_PARTITION(value);
629 if (majdev == 2) { /* floppy, as known to the boot block... */
630 printf("/dev/fd%d", unit);
633 for (p = maj2name; p->name != NULL && p->majdev != majdev ; p++) ;
634 if (p->name != NULL) { /* found */
635 if (slice == WHOLE_DISK_SLICE)
636 printf("/dev/%s%d%c", p->name, unit, part);
638 printf("/dev/%s%ds%d%c",
639 p->name, unit, slice - BASE_SLICE + 1, part + 'a');
641 printf("unknown (major %d unit %d slice %d part %d)",
642 majdev, unit, slice, part);
648 * This formats and outputs the value of one variable
650 * Returns zero if anything was actually output.
651 * Returns one if didn't know what to do with this.
652 * Return minus one if we had errors.
656 show_var(int *oid, size_t nlen)
658 u_char buf[BUFSIZ], *val = NULL, *p, *nul;
659 char name[BUFSIZ], *fmt;
660 const char *sep, *spacer;
661 int qoid[CTL_MAXNAME+2];
665 int (*func)(int, void *);
669 memcpy(qoid + 2, oid, nlen * sizeof(int));
673 i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
675 err(1, "sysctl name %d %zu %d", i, j, errno);
687 if (dflag) { /* just print description */
690 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
692 printf("%s%s", name, sep);
696 /* find an estimate of how much we need for this var */
698 i = sysctl(oid, nlen, 0, &j, 0, 0);
699 j += j; /* we want to be sure :-) */
706 i = sysctl(oid, nlen, val, &len, 0, 0);
713 fwrite(val, 1, len, stdout);
719 oidfmt(oid, nlen, fmt, &kind);
724 printf("%s%s", name, sep);
725 nul = memchr(p, '\0', len);
726 fwrite(p, nul == NULL ? (int)len : nul - p, 1, stdout);
731 printf("%s%s", name, sep);
734 while (len >= sizeof(int)) {
736 printf("%s%u", spacer, *(unsigned int *)p);
737 else if (*fmt == 'K' && *(int *)p >= 0)
738 printf("%s%.1fC", spacer, (*(int *)p - 2732) / 10.0);
740 printf("%s%d", spacer, *(int *)p);
749 printf("%s%s", name, sep);
752 if (!strcmp(name, "machdep.guessed_bootdev"))
753 return machdep_bootdev(*(unsigned long *)p);
756 while (len >= sizeof(long)) {
758 printf("%s%lu", spacer, *(unsigned long *)p);
760 printf("%s%ld", spacer, *(long *)p);
769 printf("%s%s", name, sep);
770 printf("%p", *(void **)p);
775 printf("%s%s", name, sep);
778 while (len >= sizeof(quad_t)) {
781 spacer, (uintmax_t)*(u_quad_t *)p);
784 spacer, (intmax_t)*(quad_t *)p);
787 len -= sizeof(int64_t);
788 p += sizeof(int64_t);
794 if (!oflag && !xflag) {
796 if (strcmp(fmt, "S,clockinfo") == 0)
798 else if (strcmp(fmt, "S,timespec") == 0)
800 else if (strcmp(fmt, "S,timeval") == 0)
802 else if (strcmp(fmt, "S,loadavg") == 0)
804 else if (strcmp(fmt, "S,sensor") == 0)
806 else if (strcmp(fmt, "T,dev_t") == 0)
808 else if (strcmp(fmt, "T,udev_t") == 0)
814 printf("%s%s", name, sep);
815 error = (*func)(len, p);
821 if (!oflag && !xflag) {
826 printf("%s%s", name, sep);
827 printf("Format:%s Length:%zu Dump:0x", fmt, len);
828 while (len-- && (xflag || p < val + 16))
829 printf("%02x", *p++);
830 if (!xflag && len > 16)
842 sysctl_all(int *oid, size_t len)
844 int name1[22], name2[22];
852 memcpy(name1+2, oid, len * sizeof(int));
860 retval = sysctl(name1, l1, name2, &l2, 0, 0);
865 err(1, "sysctl(getnext) %d %zu", retval, l2);
873 for (i = 0; i < len; i++)
874 if (name2[i] != oid[i])
877 retval = show_var(name2, l2);
878 if (retval == 0 && !bflag)
881 memcpy(name1+2, name2, l2 * sizeof(int));