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463 lines
10 KiB
C
463 lines
10 KiB
C
/*
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)from: sysctl.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$Id: sysctl.c,v 1.15 1997/10/20 12:53:54 charnier Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/resource.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int Aflag, aflag, nflag, wflag, Xflag, bflag;
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static int oidfmt(int *, int, char *, u_int *);
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static void parse(char *);
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static int show_var(int *, int);
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static int sysctl_all (int *oid, int len);
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static int name2oid(char *, int *);
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static void
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usage(void)
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{
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(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
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"usage: sysctl [-bnX] variable ...",
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" sysctl [-bnX] -w variable=value ...",
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" sysctl [-bnX] -a",
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" sysctl [-bnX] -A");
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exit(1);
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}
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int
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main(int argc, char **argv)
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{
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int ch;
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setbuf(stdout,0);
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setbuf(stderr,0);
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while ((ch = getopt(argc, argv, "AabnwX")) != -1) {
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switch (ch) {
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case 'A': Aflag = 1; break;
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case 'a': aflag = 1; break;
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case 'b': bflag = 1; break;
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case 'n': nflag = 1; break;
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case 'w': wflag = 1; break;
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case 'X': Xflag = Aflag = 1; break;
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default: usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (Aflag || aflag)
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exit (sysctl_all(0, 0));
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if (argc == 0)
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usage();
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while (argc-- > 0)
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parse(*argv++);
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exit(0);
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}
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/*
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* Parse a name into a MIB entry.
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* Lookup and print out the MIB entry if it exists.
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* Set a new value if requested.
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*/
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static void
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parse(char *string)
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{
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int len, i, j;
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void *newval = 0;
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int intval, newsize = 0;
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quad_t quadval;
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int mib[CTL_MAXNAME];
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char *cp, *bufp, buf[BUFSIZ];
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u_int kind;
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bufp = buf;
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snprintf(buf, BUFSIZ, "%s", string);
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if ((cp = strchr(string, '=')) != NULL) {
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if (!wflag)
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errx(2, "must specify -w to set variables");
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*strchr(buf, '=') = '\0';
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*cp++ = '\0';
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while (isspace(*cp))
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cp++;
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newval = cp;
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newsize = strlen(cp);
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} else {
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if (wflag)
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usage();
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}
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len = name2oid(bufp, mib);
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if (len < 0)
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errx(1, "unknown oid '%s'", bufp);
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if (oidfmt(mib, len, 0, &kind))
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err(1, "couldn't find format of oid '%s'", bufp);
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if (!wflag) {
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if ((kind & CTLTYPE) == CTLTYPE_NODE) {
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sysctl_all(mib, len);
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} else {
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i = show_var(mib, len);
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if (!i && !bflag)
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putchar('\n');
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}
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} else {
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if ((kind & CTLTYPE) == CTLTYPE_NODE)
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errx(1, "oid '%s' isn't a leaf node", bufp);
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if (!(kind&CTLFLAG_WR))
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errx(1, "oid '%s' is read only", bufp);
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switch (kind & CTLTYPE) {
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case CTLTYPE_INT:
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intval = atoi(newval);
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newval = &intval;
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newsize = sizeof intval;
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break;
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break;
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case CTLTYPE_STRING:
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break;
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case CTLTYPE_QUAD:
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break;
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sscanf(newval, "%qd", &quadval);
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newval = &quadval;
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newsize = sizeof quadval;
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break;
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default:
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errx(1, "oid '%s' is type %d,"
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" cannot set that", bufp,
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kind & CTLTYPE);
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}
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i = show_var(mib, len);
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if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
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if (!i && !bflag)
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putchar('\n');
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switch (errno) {
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case EOPNOTSUPP:
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errx(1, "%s: value is not available",
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string);
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case ENOTDIR:
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errx(1, "%s: specification is incomplete",
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string);
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case ENOMEM:
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errx(1, "%s: type is unknown to this program",
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string);
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default:
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warn("%s", string);
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return;
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}
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}
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if (!bflag)
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printf(" -> ");
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i = nflag;
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nflag = 1;
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j = show_var(mib, len);
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if (!j && !bflag)
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putchar('\n');
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nflag = i;
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}
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}
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/* These functions will dump out various interesting structures. */
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static int
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S_clockinfo(int l2, void *p)
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{
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struct clockinfo *ci = (struct clockinfo*)p;
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if (l2 != sizeof *ci)
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err(1, "S_clockinfo %d != %d", l2, sizeof *ci);
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printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
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ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
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return (0);
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}
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static int
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S_loadavg(int l2, void *p)
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{
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struct loadavg *tv = (struct loadavg*)p;
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if (l2 != sizeof *tv)
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err(1, "S_loadavg %d != %d", l2, sizeof *tv);
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printf("{ %.2f %.2f %.2f }",
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(double)tv->ldavg[0]/(double)tv->fscale,
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(double)tv->ldavg[1]/(double)tv->fscale,
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(double)tv->ldavg[2]/(double)tv->fscale);
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return (0);
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}
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static int
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S_timeval(int l2, void *p)
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{
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struct timeval *tv = (struct timeval*)p;
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char *p1, *p2;
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if (l2 != sizeof *tv)
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err(1, "S_timeval %d != %d", l2, sizeof *tv);
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printf("{ sec = %ld, usec = %ld } ",
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tv->tv_sec, tv->tv_usec);
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p1 = strdup(ctime(&tv->tv_sec));
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for (p2=p1; *p2 ; p2++)
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if (*p2 == '\n')
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*p2 = '\0';
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fputs(p1, stdout);
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return (0);
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}
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static int
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T_dev_t(int l2, void *p)
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{
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dev_t *d = (dev_t *)p;
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if (l2 != sizeof *d)
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err(1, "T_dev_T %d != %d", l2, sizeof *d);
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printf("{ major = %d, minor = %d }",
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major(*d), minor(*d));
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return (0);
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}
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/*
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* These functions uses a presently undocumented interface to the kernel
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* to walk the tree and get the type so it can print the value.
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* This interface is under work and consideration, and should probably
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* be killed with a big axe by the first person who can find the time.
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* (be aware though, that the proper interface isn't as obvious as it
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* may seem, there are various conflicting requirements.
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*/
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static int
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name2oid(char *name, int *oidp)
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{
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int oid[2];
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int i, j;
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oid[0] = 0;
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oid[1] = 3;
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j = CTL_MAXNAME * sizeof (int);
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i = sysctl(oid, 2, oidp, &j, name, strlen(name));
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if (i < 0)
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return i;
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j /= sizeof (int);
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return (j);
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}
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static int
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oidfmt(int *oid, int len, char *fmt, u_int *kind)
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{
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int qoid[CTL_MAXNAME+2];
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u_char buf[BUFSIZ];
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int i, j;
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qoid[0] = 0;
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qoid[1] = 4;
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memcpy(qoid + 2, oid, len * sizeof(int));
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j = sizeof buf;
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i = sysctl(qoid, len + 2, buf, &j, 0, 0);
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if (i)
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err(1, "sysctl fmt %d %d %d", i, j, errno);
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if (kind)
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*kind = *(u_int *)buf;
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if (fmt)
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strcpy(fmt, (char *)(buf + sizeof(u_int)));
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return 0;
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}
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/*
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* This formats and outputs the value of one variable
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*
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* Returns zero if anything was actually output.
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* Returns one if didn't know what to do with this.
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* Return minus one if we had errors.
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*/
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static int
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show_var(int *oid, int nlen)
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{
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u_char buf[BUFSIZ], *val, *p;
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char name[BUFSIZ], *fmt;
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int qoid[CTL_MAXNAME+2];
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int i, j, len;
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u_int kind;
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int (*func)(int, void *) = 0;
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/* find an estimate of how much we need for this var */
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j = 0;
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i = sysctl(oid, nlen, 0, &j, 0, 0);
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j += j; /* we want to be sure :-) */
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val = alloca(j);
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len = j;
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i = sysctl(oid, nlen, val, &len, 0, 0);
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if (i || !len)
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return (1);
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if (bflag) {
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fwrite(val, 1, len, stdout);
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return (0);
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}
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qoid[0] = 0;
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qoid[1] = 4;
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memcpy(qoid + 2, oid, nlen * sizeof(int));
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j = sizeof buf;
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i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
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if (i || !j)
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err(1, "sysctl fmt %d %d %d", i, j, errno);
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kind = *(u_int *)buf;
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fmt = (char *)(buf + sizeof(u_int));
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qoid[1] = 1;
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j = sizeof name;
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i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
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if (i || !j)
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err(1, "sysctl name %d %d %d", i, j, errno);
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p = val;
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switch (*fmt) {
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case 'A':
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if (!nflag)
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printf("%s: ", name);
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printf("%s", p);
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return (0);
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case 'I':
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if (!nflag)
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printf("%s: ", name);
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printf("%d", *(int *)p);
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return (0);
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case 'T':
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case 'S':
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i = 0;
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if (!strcmp(fmt, "S,clockinfo")) func = S_clockinfo;
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else if (!strcmp(fmt, "S,timeval")) func = S_timeval;
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else if (!strcmp(fmt, "S,loadavg")) func = S_loadavg;
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else if (!strcmp(fmt, "T,dev_t")) func = T_dev_t;
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if (func) {
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if (!nflag)
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printf("%s: ", name);
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return ((*func)(len, p));
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}
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/* FALL THROUGH */
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default:
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if (!Aflag)
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return (1);
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if (!nflag)
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printf("%s: ", name);
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printf("Format:%s Length:%d Dump:0x", fmt, len);
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while (len--) {
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printf("%02x", *p++);
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if (Xflag || p < val+16)
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continue;
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printf("...");
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break;
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}
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return (0);
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}
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return (1);
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}
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static int
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sysctl_all (int *oid, int len)
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{
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int name1[22], name2[22];
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int i, j, l1, l2;
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name1[0] = 0;
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name1[1] = 2;
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l1 = 2;
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if (len) {
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memcpy(name1+2, oid, len*sizeof (int));
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l1 += len;
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} else {
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name1[2] = 1;
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l1++;
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}
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while (1) {
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l2 = sizeof name2;
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j = sysctl(name1, l1, name2, &l2, 0, 0);
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if (j < 0)
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if (errno == ENOENT)
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return 0;
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else
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err(1, "sysctl(getnext) %d %d", j, l2);
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l2 /= sizeof (int);
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if (l2 < len)
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return 0;
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for (i = 0; i < len; i++)
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if (name2[i] != oid[i])
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return 0;
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i = show_var(name2, l2);
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if (!i && !bflag)
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putchar('\n');
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memcpy(name1+2, name2, l2*sizeof (int));
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l1 = 2 + l2;
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}
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}
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