Libc-498.tar.gz

[apple/libc.git] / gen / sysctlbyname-fbsd.c

diff --git a/gen/sysctlbyname-fbsd.c b/gen/sysctlbyname-fbsd.c
new file mode 100644 (file)
index 0000000..e949a5c
--- /dev/null
+++ b/gen/sysctlbyname-fbsd.c
@@ -0,0 +1,39 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
+ * ----------------------------------------------------------------------------
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/gen/sysctlbyname.c,v 1.5 2002/02/01 00:57:29 obrien Exp $");
+
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <string.h>
+
+int
+sysctlbyname(const char *name, void *oldp, size_t *oldlenp, void *newp,
+            size_t newlen)
+{
+       int name2oid_oid[2];
+       int real_oid[CTL_MAXNAME+2];
+       int error;
+       size_t oidlen;
+
+       name2oid_oid[0] = 0;    /* This is magic & undocumented! */
+       name2oid_oid[1] = 3;
+
+       oidlen = sizeof(real_oid);
+       error = sysctl(name2oid_oid, 2, real_oid, &oidlen, (void *)name,
+                      strlen(name));
+       if (error < 0) 
+               return error;
+       oidlen /= sizeof (int);
+       error = sysctl(real_oid, oidlen, oldp, oldlenp, newp, newlen);
+       return (error);
+}
+