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/*
* Portability wrapper around the kafs API.
*
* This header includes kafs.h if it's available, prototypes k_hasafs,
* k_setpag, and k_unlog replacements (generally provided by the kafs
* replacement library) imlemented in terms of our system call layer or
* lsetpag if it is available and libkafs isn't, and as a last resort provides
* a k_hasafs function that always fails and k_setpag and k_unlog functions
* that always succeed.
*
* It also defines the HAVE_KAFS macro to 1 if some AFS support was available,
* in case programs that use it want to handle the case of no AFS support
* differently (such as in help output).
*
* The canonical version of this file is maintained in the rra-c-util package,
* which can be found at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
*
* Written by Russ Allbery <eagle@eyrie.org>
* Copyright 2006, 2007, 2008, 2010, 2013
* The Board of Trustees of the Leland Stanford Junior University
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef PORTABLE_KAFS_H
#define PORTABLE_KAFS_H 1
#include <config.h>
#ifdef HAVE_KRB5
# include <portable/krb5.h>
#endif
#include <portable/macros.h>
#include <errno.h>
#ifdef HAVE_SYS_IOCCOM_H
# include <sys/ioccom.h>
#endif
#include <sys/ioctl.h>
BEGIN_DECLS
/* Assume we have some AFS support available and #undef below if not. */
#define HAVE_KAFS 1
/* We have a libkafs or libkopenafs library. */
#if HAVE_K_HASAFS
# if HAVE_KAFS_H
# include <kafs.h>
# elif HAVE_KOPENAFS_H
# include <kopenafs.h>
# else
struct ViceIoctl {
void *in, *out;
short in_size;
short out_size;
};
int k_hasafs(void);
int k_pioctl(char *, struct ViceIoctl *, void *, int);
int k_setpag(void);
int k_unlog(void);
# endif
# ifdef HAVE_K_HASPAG
# if !defined(HAVE_KAFS_H) && !defined(HAVE_KOPENAFS_H)
int k_haspag(void);
# endif
# else
int k_haspag(void) __attribute__((__visibility__("hidden")));
# endif
/* We're linking directly to the OpenAFS libraries. */
#elif HAVE_LSETPAG
# if HAVE_AFS_AFSSYSCALLS_H
# include <afs/afssyscalls.h>
# else
int lsetpag(void);
int lpioctl(char *, int, void *, int);
# endif
# define k_hasafs() (1)
# define k_pioctl(p, c, a, f) lpioctl((p), (c), (a), (f))
# define k_setpag() lsetpag()
# define k_unlog() (errno = ENOSYS, -1)
int k_haspag(void) __attribute__((__visibility__("hidden")));
/* We're using our local kafs replacement. */
#elif HAVE_KAFS_REPLACEMENT
# define HAVE_K_PIOCTL 1
struct ViceIoctl {
void *in, *out;
short in_size;
short out_size;
};
/* Default to a hidden visibility for all portability functions. */
#pragma GCC visibility push(hidden)
int k_hasafs(void);
int k_haspag(void);
int k_pioctl(char *, int, struct ViceIoctl *, int);
int k_setpag(void);
int k_unlog(void);
/* Undo default visibility change. */
#pragma GCC visibility pop
/* We have no kafs implementation available. */
#else
# undef HAVE_KAFS
# define k_hasafs() (0)
# define k_haspag() (0)
# define k_pioctl(p, c, a, f) (errno = ENOSYS, -1)
# define k_setpag() (errno = ENOSYS, -1)
# define k_unlog() (errno = ENOSYS, -1)
#endif
END_DECLS
#endif /* PORTABLE_KAFS_H */
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