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/* $OpenBSD: sysctl.c,v 1.5 2009/06/03 23:44:53 krw Exp $ */
/*
* Copyright (c) 2009 Theo de Raadt <deraadt@openbsd.org>
* Copyright (c) 2007 Kenneth R. Westerback <krw@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct var {
char *name;
int (*print)(struct var *);
int nmib;
int mib[3];
};
int pstring(struct var *);
int pint(struct var *);
struct var vars[] = {
{ "kern.osrelease", pstring, 2,
{ CTL_KERN, KERN_OSRELEASE }},
{ "hw.machine", pstring, 2,
{ CTL_HW, HW_MACHINE }},
{ "hw.model", pstring, 2,
{ CTL_HW, HW_MODEL }},
{ "hw.disknames", pstring, 2,
{ CTL_HW, HW_DISKNAMES }},
{ "hw.ncpufound", pint, 2,
{ CTL_HW, HW_NCPUFOUND }},
};
int nflag;
char *name;
int
pint(struct var *v)
{
int n;
size_t len = sizeof(n);
if (sysctl(v->mib, v->nmib, &n, &len, NULL, 0) != -1) {
if (nflag == 0)
printf("%s=", v->name);
printf("%d\n", n);
return (0);
}
return (1);
}
int
pstring(struct var *v)
{
struct iovec iov[2];
char *p;
size_t len;
if (sysctl(v->mib, v->nmib, NULL, &len, NULL, 0) != -1)
if ((p = malloc(len)) != NULL)
if (sysctl(v->mib, v->nmib, p, &len, NULL, 0) != -1) {
if (nflag == 0)
printf("%s=", v->name);
fwrite(p, len, 1, stdout);
printf("\n");
return (0);
}
return (1);
}
int
main(int argc, char *argv[])
{
int ch, i;
while ((ch = getopt(argc, argv, "n")) != -1) {
switch (ch) {
case 'n':
nflag = 1;
break;
default:
fprintf(stderr, "usage: sysctl [-n] name\n");
exit(1);
}
}
argc -= optind;
argv += optind;
if (argc == 0) {
for (i = 0; i < sizeof(vars)/sizeof(vars[0]); i++)
(vars[i].print)(&vars[i]);
exit(0);
}
while (argc--) {
name = *argv++;
for (i = 0; i < sizeof(vars)/sizeof(vars[0]); i++) {
if (strcmp(name, vars[i].name) == 0) {
(vars[i].print)(&vars[i]);
break;
}
}
}
exit(0);
}
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