stand: lua: break out a few more dirent types in lfs

These are non-standard and specific to the version used in loader. We
have some desire to recognize symlinks to avoid filtering out kernel
symli

stand: lua: break out a few more dirent types in lfs

These are non-standard and specific to the version used in loader. We
have some desire to recognize symlinks to avoid filtering out kernel
symlinks in the autodetection bits when they would be perfectly fine to
`load`.

This won't be usable right away, so any impending use will need to be
careful to account for nil.

Reported by: leres

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flua: kick out the remaining builtin modules

Bootstrap flua has some magic now to handle modules by building them in
and discovering them via linker sets. This is slightly cleaner than
always build

flua: kick out the remaining builtin modules

Bootstrap flua has some magic now to handle modules by building them in
and discovering them via linker sets. This is slightly cleaner than
always building them in and baking them into loadedlibs for both
bootstrap and system flua.

Adjust the stand build now that these three libs have their own new
homes.

Reviewed by: bapt, emaste
Differential Revision: https://reviews.freebsd.org/D51891

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Revert "flua: kick out the remaining builtin modules"

This reverts commit 80ada959004c4386880e47b11618f8abfc2d80e1, because
bootstrap flua is about to get backed out.

flua: kick out the remaining builtin modules

Bootstrap flua has some magic now to handle modules by building them in
and discovering them via linker sets. This is slightly cleaner than
always build

flua: kick out the remaining builtin modules

Bootstrap flua has some magic now to handle modules by building them in
and discovering them via linker sets. This is slightly cleaner than
always building them in and baking them into loadedlibs for both
bootstrap and system flua.

Adjust the stand build now that these three libs have their own new
homes.

Reviewed by: bapt, emaste
Differential Revision: https://reviews.freebsd.org/D51891

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Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

stand: lua: enhance lfs.dir() to speed up kernels_autodetect

This eliminates a lot of stat() calls that happen when lualoader renders the
menu with the default settings, and greatly speeds up render

stand: lua: enhance lfs.dir() to speed up kernels_autodetect

This eliminates a lot of stat() calls that happen when lualoader renders the
menu with the default settings, and greatly speeds up rendering on my
laptop.

ftype is nil if loader/loader.efi hasn't been updated yet, falling back to
lfs.attributes() to test.

This is technically incompatible with lfs, but not in a particularly
terrible way.

Reviewed-by: cem
MFC-after: 4 days
Differential Revision: https://reviews.freebsd.org/D27542

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Add flua to the base system, install to /usr/libexec

FreeBSDlua ("flua") is a FreeBSD-private lua, flavored with whatever
extensions we need for base system operations. We currently support a subset

Add flua to the base system, install to /usr/libexec

FreeBSDlua ("flua") is a FreeBSD-private lua, flavored with whatever
extensions we need for base system operations. We currently support a subset
of lfs and lposix that are used in the rewrite of makesyscall.sh into lua,
added in r354786.

flua is intentionally written such that one can install standard lua and
some set of lua modules from ports and achieve the same effect.

linit_flua is a copy of linit.c from contrib/lua with lfs and lposix added
in. This is similar to what we do in stand/. linit.c has been renamed to
make it clear that this has flua-specific bits.

luaconf has been slightly obfuscated to make extensions more difficult. Part
of the problem is that flua is already hard enough to use as a bootstrap
tool because it's not in PATH- attempting to do extension loading would
require a special bootstrap version of flua with paths changed to protect
the innocent.

src.lua.mk has been added to make it easy for in-tree stuff to find flua,
whether it's bootstrap-flua or relying on PATH frobbing by Makefile.inc1.

Reviewed by: brooks, emaste (both earlier version), imp
Differential Revision: https://reviews.freebsd.org/D21893

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Lua lfs.attributes: Provide a more consistent error return

In the remaining error case, return a 3-tuple consistent with the other
error return case.

Document how to invoke lfs.attributes() and det

Lua lfs.attributes: Provide a more consistent error return

In the remaining error case, return a 3-tuple consistent with the other
error return case.

Document how to invoke lfs.attributes() and detect/decode error return in
example comments.

Reviewed by: kevans
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14451

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Lua loader: Add barebones "lfs" module

Add a Lua FileSystem module, an emulation of a subset of the permissively
licensed (MIT) Lua library of the same name[0], to our loader's Lua
environment.

[0]

Lua loader: Add barebones "lfs" module

Add a Lua FileSystem module, an emulation of a subset of the permissively
licensed (MIT) Lua library of the same name[0], to our loader's Lua
environment.

[0]: https://github.com/keplerproject/luafilesystem/

Reviewed by: kevans
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14418

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