3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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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
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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 1.12 2005/04/23 19:57:35 joerg 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 set_T_dev_t ((char*)newval, &newval, &newsize);
246 errx(1, "oid '%s' is type %d,"
247 " cannot set that", name,
251 i = show_var(mib, len);
252 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
257 errx(1, "%s: value is not available",
260 errx(1, "%s: specification is incomplete",
263 errx(1, "%s: type is unknown to this program",
274 j = show_var(mib, len);
280 if (name_allocated != NULL)
281 free(name_allocated);
284 /* These functions will dump out various interesting structures. */
287 S_clockinfo(int l2, void *p)
289 struct clockinfo *ci = (struct clockinfo*)p;
290 if (l2 != sizeof(*ci))
291 err(1, "S_clockinfo %d != %d", l2, sizeof(*ci));
292 printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
293 ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
298 S_loadavg(int l2, void *p)
300 struct loadavg *tv = (struct loadavg*)p;
302 if (l2 != sizeof(*tv))
303 err(1, "S_loadavg %d != %d", l2, sizeof(*tv));
305 printf("{ %.2f %.2f %.2f }",
306 (double)tv->ldavg[0]/(double)tv->fscale,
307 (double)tv->ldavg[1]/(double)tv->fscale,
308 (double)tv->ldavg[2]/(double)tv->fscale);
313 S_timeval(int l2, void *p)
315 struct timeval *tv = (struct timeval*)p;
319 if (l2 != sizeof(*tv))
320 err(1, "S_timeval %d != %d", l2, sizeof(*tv));
321 printf("{ sec = %ld, usec = %ld } ",
322 tv->tv_sec, tv->tv_usec);
324 p1 = strdup(ctime(&tv_sec));
325 for (p2=p1; *p2 ; p2++)
333 T_dev_t(int l2, void *p)
335 dev_t *d = (dev_t *)p;
336 if (l2 != sizeof(*d))
337 err(1, "T_dev_T %d != %d", l2, sizeof(*d));
338 if ((int)(*d) != -1) {
339 if (minor(*d) > 255 || minor(*d) < 0)
340 printf("{ major = %d, minor = 0x%x }",
341 major(*d), minor(*d));
343 printf("{ major = %d, minor = %d }",
344 major(*d), minor(*d));
350 set_T_dev_t(const char *path, void **val, int *size)
352 static struct stat statb;
354 if (strcmp(path, "none") && strcmp(path, "off")) {
355 int rc = stat (path, &statb);
357 err(1, "cannot stat %s", path);
360 if (!S_ISCHR(statb.st_mode)) {
361 errx(1, "must specify a device special file.");
364 statb.st_rdev = NODEV;
366 *val = (char*) &statb.st_rdev;
367 *size = sizeof statb.st_rdev;
371 * These functions uses a presently undocumented interface to the kernel
372 * to walk the tree and get the type so it can print the value.
373 * This interface is under work and consideration, and should probably
374 * be killed with a big axe by the first person who can find the time.
375 * (be aware though, that the proper interface isn't as obvious as it
376 * may seem, there are various conflicting requirements.
380 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
382 int qoid[CTL_MAXNAME+2];
389 memcpy(qoid + 2, oid, len * sizeof(int));
392 i = sysctl(qoid, len + 2, buf, &j, 0, 0);
394 err(1, "sysctl fmt %d %d %d", i, j, errno);
397 *kind = *(u_int *)buf;
400 strcpy(fmt, (char *)(buf + sizeof(u_int)));
406 * Code to map a bootdev major number into a suitable device name.
407 * Major numbers are mapped into names as in boot2.c
418 { -1, NULL } /* terminator */
422 machdep_bootdev(u_long value)
424 int majdev, unit, slice, part;
427 if ((value & B_MAGICMASK) != B_DEVMAGIC) {
428 printf("invalid (0x%08lx)", value);
431 majdev = B_TYPE(value);
432 unit = B_UNIT(value);
433 slice = B_SLICE(value);
434 part = B_PARTITION(value);
435 if (majdev == 2) { /* floppy, as known to the boot block... */
436 printf("/dev/fd%d", unit);
439 for (p = maj2name; p->name != NULL && p->majdev != majdev ; p++) ;
440 if (p->name != NULL) { /* found */
441 if (slice == WHOLE_DISK_SLICE)
442 printf("/dev/%s%d%c", p->name, unit, part);
444 printf("/dev/%s%ds%d%c",
445 p->name, unit, slice - BASE_SLICE + 1, part + 'a');
447 printf("unknown (major %d unit %d slice %d part %d)",
448 majdev, unit, slice, part);
454 * This formats and outputs the value of one variable
456 * Returns zero if anything was actually output.
457 * Returns one if didn't know what to do with this.
458 * Return minus one if we had errors.
462 show_var(int *oid, size_t nlen)
464 u_char buf[BUFSIZ], *val, *p, *nul;
465 char name[BUFSIZ], *fmt;
466 const char *sep, *spacer;
467 int qoid[CTL_MAXNAME+2];
471 int (*func)(int, void *);
474 memcpy(qoid + 2, oid, nlen * sizeof(int));
478 i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
480 err(1, "sysctl name %d %d %d", i, j, errno);
492 if (dflag) { /* just print description */
495 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
497 printf("%s%s", name, sep);
501 /* find an estimate of how much we need for this var */
503 i = sysctl(oid, nlen, 0, &j, 0, 0);
504 j += j; /* we want to be sure :-) */
508 i = sysctl(oid, nlen, val, &len, 0, 0);
513 fwrite(val, 1, len, stdout);
519 oidfmt(oid, nlen, fmt, &kind);
524 printf("%s%s", name, sep);
525 nul = memchr(p, '\0', len);
526 fwrite(p, nul == NULL ? len : nul - p, 1, stdout);
531 printf("%s%s", name, sep);
534 while (len >= sizeof(int)) {
536 printf("%s%u", spacer, *(unsigned int *)p);
538 printf("%s%d", spacer, *(int *)p);
547 printf("%s%s", name, sep);
550 if (!strcmp(name, "machdep.guessed_bootdev"))
551 return machdep_bootdev(*(unsigned long *)p);
554 while (len >= sizeof(long)) {
556 printf("%s%lu", spacer, *(unsigned long *)p);
558 printf("%s%ld", spacer, *(long *)p);
567 printf("%s%s", name, sep);
568 printf("%p", *(void **)p);
573 printf("%s%s", name, sep);
576 while (len >= sizeof(quad_t)) {
578 printf("%s%qu", spacer, *(u_quad_t *)p);
580 printf("%s%qd", spacer, *(quad_t *)p);
582 len -= sizeof(int64_t);
583 p += sizeof(int64_t);
589 if (!oflag && !xflag) {
591 if (strcmp(fmt, "S,clockinfo") == 0)
593 else if (strcmp(fmt, "S,timeval") == 0)
595 else if (strcmp(fmt, "S,loadavg") == 0)
597 else if (strcmp(fmt, "T,dev_t") == 0)
603 printf("%s%s", name, sep);
604 return ((*func)(len, p));
609 if (!oflag && !xflag)
612 printf("%s%s", name, sep);
613 printf("Format:%s Length:%d Dump:0x", fmt, len);
614 while (len-- && (xflag || p < val + 16))
615 printf("%02x", *p++);
616 if (!xflag && len > 16)
624 sysctl_all(int *oid, size_t len)
626 int name1[22], name2[22];
634 memcpy(name1+2, oid, len * sizeof(int));
642 retval = sysctl(name1, l1, name2, &l2, 0, 0);
647 err(1, "sysctl(getnext) %d %d", retval, l2);
655 for (i = 0; i < len; i++)
656 if (name2[i] != oid[i])
659 retval = show_var(name2, l2);
660 if (retval == 0 && !bflag)
663 memcpy(name1+2, name2, l2 * sizeof(int));