device is opened by default).
Don't open the file w/o adding a /dev/ prefix unless the file has
a '/' in it.  This prevents problems where someone says "disklabel
sd0" with a file called "sd0" in the cwd.
The OPENDEV_DRCT flag has been deprecated as it is the the default
behavior and always has been.
Add checks for >= MAXPATHLEN and return ENAMETOOLONG in that case.

errors specified by the library routine malloc(3)).

- s/MESSAGES/DIAGNOSTICS/, and put message descriptions in a nice list.
- Talk more about how using malloc() in signal handlers is bad.

Markus Friedl.

commit, as we want our documentation to be as consistently formatted as
possible (it's getting there :-)).

appropriate mdoc macros to handle these cases.

least, this is the impression I get from looking at a lot of Perl docs.

calloc(), and realloc().  Idea from NetBSD.

(K&R-style type promotions are evil),

their own malloc() implementation.

didn't do so for us.  By default, malloc() zeros out the space it
allocates but the programmer cannot rely on this as it is implementation-
specific (and configurable via /etc/malloc.conf)