Convert casperd(8) daemon to the libcasper.

After calling the cap_init(3) function Casper will fork from it's original
process, using pdfork(2). Forking from a process has a lot of advantages:
1. We have the same cwd as the original process.
2. The same uid, gid and groups.
3. The same MAC labels.
4. The same descriptor table.
5. The same routing table.
6. The same umask.
7. The same cpuset(1).
From now services are also in form of libraries.
We also removed libcapsicum at all and converts existing program using Casper
to new architecture.

Discussed with:		pjd, jonathan, ed, drysdale@google.com, emaste
Partially reviewed by:	drysdale@google.com, bdrewery
Approved by:		pjd (mentor)
Differential Revision:	https://reviews.freebsd.org/D4277

1 files changed, 0 insertions, 115 deletions

diff --git a/lib/libcapsicum/libcapsicum.h b/lib/libcapsicum/libcapsicum.h
deleted file mode 100644
index c7110d8..0000000
--- a/lib/libcapsicum/libcapsicum.h
+++ /dev/null
@@ -1,115 +0,0 @@
-/*-
- * Copyright (c) 2012-2013 The FreeBSD Foundation
- * All rights reserved.
- *
- * This software was developed by Pawel Jakub Dawidek under sponsorship from
- * the FreeBSD Foundation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#ifndef	_LIBCAPSICUM_H_
-#define	_LIBCAPSICUM_H_
-
-#ifndef	_NVLIST_T_DECLARED
-#define	_NVLIST_T_DECLARED
-struct nvlist;
-
-typedef struct nvlist nvlist_t;
-#endif
-
-#ifndef	_CAP_CHANNEL_T_DECLARED
-#define	_CAP_CHANNEL_T_DECLARED
-struct cap_channel;
-
-typedef struct cap_channel cap_channel_t;
-#endif
-
-/*
- * The function opens unrestricted communication channel to Casper.
- */
-cap_channel_t *cap_init(void);
-
-/*
- * The function creates cap_channel_t based on the given socket.
- */
-cap_channel_t *cap_wrap(int sock);
-
-/*
- * The function returns communication socket and frees cap_channel_t.
- */
-int	cap_unwrap(cap_channel_t *chan);
-
-/*
- * The function clones the given capability.
- */
-cap_channel_t *cap_clone(const cap_channel_t *chan);
-
-/*
- * The function closes the given capability.
- */
-void	cap_close(cap_channel_t *chan);
-
-/*
- * The function returns socket descriptor associated with the given
- * cap_channel_t for use with select(2)/kqueue(2)/etc.
- */
-int	cap_sock(const cap_channel_t *chan);
-
-/*
- * The function limits the given capability.
- * It always destroys 'limits' on return.
- */
-int	cap_limit_set(const cap_channel_t *chan, nvlist_t *limits);
-
-/*
- * The function returns current limits of the given capability.
- */
-int	cap_limit_get(const cap_channel_t *chan, nvlist_t **limitsp);
-
-#ifdef TODO
-/*
- * The function registers a service within provided Casper's capability.
- * It will run with the same privileges the process has at the time of
- * calling this function.
- */
-int	cap_service_register(cap_channel_t *chan, const char *name,
-	    cap_func_t *func);
-#endif
-
-/*
- * Function sends nvlist over the given capability.
- */
-int	cap_send_nvlist(const cap_channel_t *chan, const nvlist_t *nvl);
-/*
- * Function receives nvlist over the given capability.
- */
-nvlist_t *cap_recv_nvlist(const cap_channel_t *chan, int flags);
-/*
- * Function sends the given nvlist, destroys it and receives new nvlist in
- * response over the given capability.
- */
-nvlist_t *cap_xfer_nvlist(const cap_channel_t *chan, nvlist_t *nvl, int flags);
-
-#endif	/* !_LIBCAPSICUM_H_ */