projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 A |
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 | * | |
| e9ce8d39 | 9 | */ |
| 9385eb3d A |
10 | |
| 11 | #include <sys/cdefs.h> | |
| 12 | __FBSDID("$FreeBSD: src/lib/libc/gen/sysctlbyname.c,v 1.5 2002/02/01 00:57:29 obrien Exp $"); | |
| 13 | ||
| e9ce8d39 A |
14 | #include <sys/types.h> |
| 15 | #include <sys/sysctl.h> | |
| 16 | #include <string.h> | |
| 17 | ||
| 18 | int | |
| 19 | sysctlbyname(const char *name, void *oldp, size_t *oldlenp, void *newp, | |
| 20 | size_t newlen) | |
| 21 | { | |
| 22 | int name2oid_oid[2]; | |
| 23 | int real_oid[CTL_MAXNAME+2]; | |
| 24 | int error; | |
| 25 | size_t oidlen; | |
| 26 | ||
| 27 | name2oid_oid[0] = 0; /* This is magic & undocumented! */ | |
| 28 | name2oid_oid[1] = 3; | |
| 29 | ||
| 30 | oidlen = sizeof(real_oid); | |
| 31 | error = sysctl(name2oid_oid, 2, real_oid, &oidlen, (void *)name, | |
| 32 | strlen(name)); | |
| 33 | if (error < 0) | |
| 34 | return error; | |
| 35 | oidlen /= sizeof (int); | |
| 36 | error = sysctl(real_oid, oidlen, oldp, oldlenp, newp, newlen); | |
| 37 | return (error); | |
| 38 | } | |
| 39 |