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/*
* Copyright (c) 1997-1998 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Simple object adapter implementing trivial oskit_file_t
* objects based on oskit_ttydev_t device objects.
*/
#include <oskit/fs/soa.h>
#include <oskit/fs/file.h>
#include <oskit/dev/dev.h>
#include <oskit/dev/tty.h>
#include <oskit/io/ttystream.h>
#include <assert.h>
#include <errno.h>
#include <malloc.h>
#include <fcntl.h>
#include <string.h>
#ifndef VERBOSITY
#define VERBOSITY 100
#endif
#if VERBOSITY > 20
#define DMARK printf(__FILE__ ":%d: " __FUNCTION__ "\n", __LINE__)
#else
#define DMARK ((void)0) /* no-op */
#endif
/*
* Structure describing a file adapter object for a device.
*/
struct ttyfile {
oskit_file_t filei;
oskit_u32_t count;
oskit_ttydev_t *dev;
};
static OSKIT_COMDECL
ttyfile_query(oskit_file_t *ff, const oskit_iid_t *iid, void **out_ihandle)
{
struct ttyfile *f = (struct ttyfile *)ff;
assert(f->count);
if (memcmp(iid, &oskit_iunknown_iid, sizeof(*iid)) == 0 ||
memcmp(iid, &oskit_file_iid, sizeof(*iid)) == 0) {
*out_ihandle = f;
++f->count;
return 0;
}
*out_ihandle = NULL;
return OSKIT_E_NOINTERFACE;
}
static OSKIT_COMDECL_U
ttyfile_addref(oskit_file_t *ff)
{
struct ttyfile *f = (struct ttyfile *)ff;
assert (f->count);
return ++f->count;
}
static OSKIT_COMDECL_U
ttyfile_release(oskit_file_t *ff)
{
struct ttyfile *f = (struct ttyfile *)ff;
assert(f->count);
if (--f->count)
return f->count;
oskit_ttydev_release(f->dev);
sfree(f, sizeof *f);
return 0;
}
/*** Operations inherited from oskit_posixio_t ***/
static OSKIT_COMDECL
ttyfile_stat(oskit_file_t *file, struct oskit_stat *st)
{
struct ttyfile *f = (void *) file;
memset(st, 0, sizeof *st);
st->ino = (oskit_ino_t) f->dev;
st->mode = OSKIT_S_IFCHR | OSKIT_S_IRWXG | OSKIT_S_IRWXU | OSKIT_S_IRWXO;
return 0;
}
static OSKIT_COMDECL
no_setstat(oskit_file_t *f, oskit_u32_t mask, const struct oskit_stat *stats)
{
return OSKIT_E_NOTIMPL;
}
static OSKIT_COMDECL
no_pathconf(oskit_file_t *f, oskit_s32_t option, oskit_s32_t *out_val)
{
return OSKIT_E_NOTIMPL;
}
static OSKIT_COMDECL
ttyfile_sync(oskit_file_t *f, oskit_bool_t wait)
{
return 0; /* Data is sunk as far as it goes. */
}
static OSKIT_COMDECL
ttyfile_datasync(oskit_file_t *f, oskit_bool_t wait)
{
return 0; /* Data is sunk as far as it goes. */
}
static OSKIT_COMDECL
ttyfile_access(oskit_file_t *f, oskit_amode_t mask)
{
/* Sure, access me big boy. */
return 0;
}
static OSKIT_COMDECL
no_readlink(oskit_file_t *f, char *buf, oskit_u32_t len,
oskit_u32_t *out_actual)
{
return OSKIT_E_NOTIMPL;
}
static OSKIT_COMDECL
ttyfile_open(oskit_file_t *file, oskit_oflags_t flags,
struct oskit_openfile **out_openfile)
{
struct ttyfile *f = (void *) file;
oskit_ttystream_t *ts;
oskit_error_t rc;
rc = oskit_ttydev_open(f->dev, flags, &ts);
if (rc)
return rc;
rc = oskit_soa_openfile_from_stream(&f->filei, (oskit_stream_t *) ts,
flags, out_openfile);
oskit_ttystream_release(ts);
return rc;
}
static OSKIT_COMDECL
ttyfile_getfs(oskit_file_t *f, struct oskit_filesystem **out_fs)
{
return OSKIT_E_NOTIMPL; /* XXX implement? */
}
static struct oskit_file_ops ttyfile_ops = {
ttyfile_query,
ttyfile_addref,
ttyfile_release,
ttyfile_stat,
no_setstat,
no_pathconf,
ttyfile_sync,
ttyfile_datasync,
ttyfile_access,
no_readlink,
ttyfile_open,
ttyfile_getfs
};
OSKIT_COMDECL
oskit_soa_file_from_tty(oskit_ttydev_t *ttydev, oskit_file_t **out_file)
{
struct ttyfile *new;
new = smalloc(sizeof *new);
if (! new)
return OSKIT_ENOMEM;
new->filei.ops = &ttyfile_ops;
new->count = 1;
new->dev = ttydev;
oskit_ttydev_addref(ttydev);
*out_file = &new->filei;
return 0;
}
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