Add a quick description of sysctlbyname() and link sysctl.3 to

sysctlbyname.3

1 files changed, 11 insertions, 1 deletions

diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3
index df0b4c2..d1fe3b3 100644
--- a/lib/libc/gen/sysctl.3
+++ b/lib/libc/gen/sysctl.3
@@ -35,13 +35,15 @@
 .Dt SYSCTL 3
 .Os
 .Sh NAME
-.Nm sysctl
+.Nm sysctl ,
+.Nm sysctlbyname
 .Nd get or set system information
 .Sh SYNOPSIS
 .Fd #include <sys/types.h>
 .Fd #include <sys/sysctl.h>
 .Ft int
 .Fn sysctl "int *name" "u_int namelen" "void *oldp" "size_t *oldlenp" "void *newp" "size_t newlen"
+.Fn sysctlbyname "const char *name" "void *oldp" "size_t *oldlenp" "void *newp" "size_t newlen"
 .Sh DESCRIPTION
 The
 .Fn sysctl
@@ -71,6 +73,14 @@ which is a
 .Fa namelen
 length array of integers.
 .Pp
+The
+.Fn sysctlbyname
+function accepts an ascii representation of the name and internally
+looks up the integer name vector.  Apart from that, it behaves the same
+as the standard
+.Fn sysctl
+function.
+.Pp
 The information is copied into the buffer specified by
 .Fa oldp .
 The size of the buffer is given by the location specified by