Refactor remaining mount_* commands to use the common pathadj()
function for resolving paths.

Make pathadj() no longer warn about symlinks. Symlinks in /dev are
regularly used in several places like LVM . The warning was also
only visible when calling a mount_* command directly as mount(8)
itself would resolve the path witout warning before passing it to
a mount_* command.

Use __dead

Default to -o linux. This prevents programs from not working just
because the -o linux flag was not supplied, i.e. it is the sensible
default. People who absolutely do not want the extra files in
their /proc for whatever aesthetic reason (it's not like they
consume any resources) can do -o nolinux.

branches: 1.22.2; 1.22.4;
Remove the \n and tabs from the __COPYRIGHT() strings.
(Tweak some to use a consistent format.)

branches: 1.21.12; 1.21.16;
Make all mount(2) return value error checks against -1. Some file
systems just checked != 0, breaking MNT_GETARGS. Others worked with < 0,
but make them check against -1 too for consistency. And sprinkle some
stylish line wrapping where appropriate.

Add additional 'sizeof args' parameter to mount(2).

use MOPT_NULL

Always check the results of getmntopts() and free them.

Kill __P(), use ANSI function declarations; WARNS=3.

Fix PR#3617 and PR#3205: call realpath to convert mount points and paths to
device nodes into absolute paths before using them.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22308, verified by myself.

use <> rather than "" for #include mntopts.h

MNT_GETARGS support

Add handling of -o linux.

make the code includable into other programs:
* make static all symbols which do not need to be exported
* rename main() to mount_FOO()
* new main() now just calls mount_FOO(), main() is only compiled in if
MOUNT_NOMAIN is not defined
* a_gid(), a_uid() and a_mask() were put into ../mount/fattr.[ch], local
versions removed

branches: 1.10.8;
Regularize error reporting of mount_* commands for failure of mount(2)
to the form:

mount_xxx: dev on dir: reason for failure

branches: 1.9.4;
resolve conflicts from lite-2 merge

* update for WARNS=1
* getopt returns -1 not EOF
* fix .Nm usage

Add const qualifier to mopts table

convert to new RCS Id conventions; reduce my headache

Update from 4.4-Lite, with local changes.

update from jsp; no man page yet, so torch the old one (for now)

should not default to read-only mount.

Man page added.

branches: 1.1.1;
mount program for proc filesystem.