Add proper const keywords to sysctl(3) parameters.

The `name' and `newp' arguments can be marked const, because the buffers
they refer to are never changed. While there, perform some other
cleanups:

- Remove K&R from sysctl.c.
- Implement sysctlbyname() using sysctlnametomib() to prevent
  duplication of an undocumented kernel interface.
- Fix some whitespace nits.

It seems the prototypes are now in sync with NetBSD as well.

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/libc/gen/sysctlnametomib.c b/lib/libc/gen/sysctlnametomib.c
index 1515784..afca95d 100644
--- a/lib/libc/gen/sysctlnametomib.c
+++ b/lib/libc/gen/sysctlnametomib.c
@@ -48,8 +48,8 @@ sysctlnametomib(const char *name, int *mibp, size_t *sizep)
 	oid[0] = 0;
 	oid[1] = 3;
 
-	*sizep *= sizeof (int);
-	error = sysctl(oid, 2, mibp, sizep, (void *)name, strlen(name));
-	*sizep /= sizeof (int);
+	*sizep *= sizeof(int);
+	error = sysctl(oid, 2, mibp, sizep, name, strlen(name));
+	*sizep /= sizeof(int);
 	return (error);
 }