lib/libc/gen/sysctlbyname.c

   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  * $FreeBSD: head/lib/libc/gen/sysctlbyname.c 244153 2012-12-12 15:27:33Z pjd $
  10  *
  11  */
  12 #include <sys/types.h>
  13 #include <sys/sysctl.h>
  14
  15 int
  16 sysctlbyname(const char *name, void *oldp, size_t *oldlenp,
  17     const void *newp, size_t newlen)
  18 {
  19         int real_oid[CTL_MAXNAME+2];
  20         size_t oidlen;
  21
  22         oidlen = sizeof(real_oid) / sizeof(int);
  23         if (sysctlnametomib(name, real_oid, &oidlen) < 0)
  24                 return (-1);
  25         return (sysctl(real_oid, oidlen, oldp, oldlenp, newp, newlen));
  26 }