xref: /freebsd/lib/libc/gen/sysctlbyname.c (revision 12f110aa1ad3c9d0ead55bf80f2f994b4b845ffb)
1 /*
2  * ----------------------------------------------------------------------------
3  * "THE BEER-WARE LICENSE" (Revision 42):
4  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
5  * can do whatever you want with this stuff. If we meet some day, and you think
6  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
7  * ----------------------------------------------------------------------------
8  *
9  */
10 
11 #include <sys/cdefs.h>
12 __FBSDID("$FreeBSD$");
13 
14 #include <sys/types.h>
15 #include <sys/sysctl.h>
16 
17 int
18 sysctlbyname(const char *name, void *oldp, size_t *oldlenp,
19     const void *newp, size_t newlen)
20 {
21 	int real_oid[CTL_MAXNAME+2];
22 	size_t oidlen;
23 
24 	oidlen = sizeof(real_oid) / sizeof(int);
25 	if (sysctlnametomib(name, real_oid, &oidlen) < 0)
26 		return (-1);
27 	return (sysctl(real_oid, oidlen, oldp, oldlenp, newp, newlen));
28 }
29