--- memory.3	2003-05-20 15:23:25.000000000 -0700
+++ memory.3.edit	2006-07-13 09:26:29.000000000 -0700
@@ -36,42 +36,101 @@
 .Dt MEMORY 3
 .Os
 .Sh NAME
-.Nm malloc ,
-.Nm free ,
-.Nm realloc ,
-.Nm calloc ,
 .Nm alloca ,
-.Nm mmap
+.Nm calloc ,
+.Nm free ,
+.Nm malloc ,
+.Nm mmap ,
+.Nm realloc
 .Nd general memory allocation operations
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
 .In stdlib.h
 .Ft void *
-.Fn malloc "size_t size"
-.Ft void
-.Fn free "void *ptr"
+.Fo alloca
+.Fa "size_t size"
+.Fc
 .Ft void *
-.Fn realloc "void *ptr" "size_t size"
+.Fo calloc
+.Fa "size_t nelem"
+.Fa "size_t elsize"
+.Fc
+.Ft void
+.Fo free
+.Fa "void *ptr"
+.Fc
 .Ft void *
-.Fn calloc "size_t nelem" "size_t elsize"
+.Fo malloc
+.Fa "size_t size"
+.Fc
 .Ft void *
-.Fn alloca "size_t size"
-.In sys/types.h
+.Fo realloc
+.Fa "void *ptr"
+.Fa "size_t size"
+.Fc
 .In sys/mman.h
 .Ft void *
-.Fn mmap "void * addr" "size_t len" "int prot" "int flags" "int fd" "off_t offset"
+.Fo mmap
+.Fa "void * addr"
+.Fa "size_t len"
+.Fa "int prot"
+.Fa "int flags"
+.Fa "int fildes"
+.Fa "off_t off"
+.Fc
 .Sh DESCRIPTION
 These functions allocate and free memory for the calling process.
 They are described in the
 individual manual pages.
+.Sh LEGACY SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <sys/mman.h>
+.Pp
+.Ft void *
+.br
+.Fo mmap
+.Fa "void * addr"
+.Fa "size_t len"
+.Fa "int prot"
+.Fa "int flags"
+.Fa "int fildes"
+.Fa "off_t off"
+.Fc ;
+.Pp
+The include file
+.In sys/types.h
+is needed for this function.
+.Sh COMPATIBILITY
+.Fn mmap
+now returns with
+.Va errno
+set to EINVAL in places that historically succeeded.
+The rules have changed as follows:
+.Bl -bullet
+.It
+The
+.Fa flags
+parameter must specify either MAP_PRIVATE or MAP_SHARED.
+.It
+The
+.Fa size
+parameter must not be 0.
+.It
+The
+.Fa off
+parameter must be a multiple of pagesize,
+as returned by
+.Fn sysconf .
+.El
 .Sh SEE ALSO
 .Xr mmap 2 ,
 .Xr alloca 3 ,
 .Xr calloc 3 ,
 .Xr free 3 ,
 .Xr malloc 3 ,
-.Xr realloc 3
+.Xr realloc 3 ,
+.Xr compat 5
 .Sh STANDARDS
 These functions, with the exception of
 .Fn alloca