/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* No user fns here. Pesch 15apr92. */
#include <_ansi.h>
#include <reent.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <sys/lock.h>
#include "local.h"
#ifdef _REENT_SMALL
const struct __sFILE_fake __sf_fake_stdin =
{_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL};
const struct __sFILE_fake __sf_fake_stdout =
{_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL};
const struct __sFILE_fake __sf_fake_stderr =
{_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL};
#endif
static _VOID
_DEFUN(std, (ptr, flags, file, data),
FILE *ptr _AND
int flags _AND
int file _AND
struct _reent *data)
{
ptr->_p = 0;
ptr->_r = 0;
ptr->_w = 0;
ptr->_flags = flags;
ptr->_flags2 = 0;
ptr->_file = file;
ptr->_bf._base = 0;
ptr->_bf._size = 0;
ptr->_lbfsize = 0;
memset (&ptr
->_mbstate
, 0, sizeof (_mbstate_t
)); ptr->_cookie = ptr;
ptr->_read = __sread;
#ifndef __LARGE64_FILES
ptr->_write = __swrite;
#else /* __LARGE64_FILES */
ptr->_write = __swrite64;
ptr->_seek64 = __sseek64;
ptr->_flags |= __SL64;
#endif /* __LARGE64_FILES */
ptr->_seek = __sseek;
ptr->_close = __sclose;
#if !defined(__SINGLE_THREAD__) && !defined(_REENT_SMALL)
__lock_init_recursive (ptr->_lock);
/*
* #else
* lock is already initialized in __sfp
*/
#endif
#ifdef __SCLE
if (__stextmode (ptr->_file))
ptr->_flags |= __SCLE;
#endif
}
struct _glue *
_DEFUN(__sfmoreglue, (d, n),
struct _reent *d _AND
register int n)
{
struct _glue *g;
FILE *p;
g = (struct _glue *) _malloc_r (d, sizeof (*g) + n * sizeof (FILE));
if (g == NULL)
return NULL;
p = (FILE *) (g + 1);
g->_next = NULL;
g->_niobs = n;
g->_iobs = p;
memset (p
, 0, n
* sizeof (FILE
)); return g;
}
/*
* Find a free FILE for fopen et al.
*/
FILE *
_DEFUN(__sfp, (d),
struct _reent *d)
{
FILE *fp;
int n;
struct _glue *g;
__sfp_lock_acquire ();
if (!_GLOBAL_REENT->__sdidinit)
__sinit (_GLOBAL_REENT);
for (g = &_GLOBAL_REENT->__sglue;; g = g->_next)
{
for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)
if (fp->_flags == 0)
goto found;
if (g->_next == NULL &&
(g->_next = __sfmoreglue (d, NDYNAMIC)) == NULL)
break;
}
__sfp_lock_release ();
d->_errno = ENOMEM;
return NULL;
found:
fp->_file = -1; /* no file */
fp->_flags = 1; /* reserve this slot; caller sets real flags */
fp->_flags2 = 0;
#ifndef __SINGLE_THREAD__
__lock_init_recursive (fp->_lock);
#endif
__sfp_lock_release ();
fp->_p = NULL; /* no current pointer */
fp->_w = 0; /* nothing to read or write */
fp->_r = 0;
fp->_bf._base = NULL; /* no buffer */
fp->_bf._size = 0;
fp->_lbfsize = 0; /* not line buffered */
memset (&fp
->_mbstate
, 0, sizeof (_mbstate_t
)); /* fp->_cookie = <any>; */ /* caller sets cookie, _read/_write etc */
fp->_ub._base = NULL; /* no ungetc buffer */
fp->_ub._size = 0;
fp->_lb._base = NULL; /* no line buffer */
fp->_lb._size = 0;
return fp;
}
/*
* exit() calls _cleanup() through *__cleanup, set whenever we
* open or buffer a file. This chicanery is done so that programs
* that do not use stdio need not link it all in.
*
* The name `_cleanup' is, alas, fairly well known outside stdio.
*/
_VOID
_DEFUN(_cleanup_r, (ptr),
struct _reent *ptr)
{
_CAST_VOID _fwalk
(ptr
, fclose); /* _CAST_VOID _fwalk (ptr, fflush); */ /* `cheating' */
}
#ifndef _REENT_ONLY
_VOID
_DEFUN_VOID(_cleanup)
{
_cleanup_r (_GLOBAL_REENT);
}
#endif
/*
* __sinit() is called whenever stdio's internal variables must be set up.
*/
_VOID
_DEFUN(__sinit, (s),
struct _reent *s)
{
__sinit_lock_acquire ();
if (s->__sdidinit)
{
__sinit_lock_release ();
return;
}
/* make sure we clean up on exit */
s->__cleanup = _cleanup_r; /* conservative */
s->__sdidinit = 1;
s->__sglue._next = NULL;
#ifndef _REENT_SMALL
s->__sglue._niobs = 3;
s->__sglue._iobs = &s->__sf[0];
#else
s->__sglue._niobs = 0;
s->__sglue._iobs = NULL;
s->_stdin = __sfp(s);
s->_stdout = __sfp(s);
s->_stderr = __sfp(s);
#endif
std (s->_stdin, __SRD, 0, s);
/* On platforms that have true file system I/O, we can verify
whether stdout is an interactive terminal or not, as part of
__smakebuf on first use of the stream. For all other platforms,
we will default to line buffered mode here. Technically, POSIX
requires both stdin and stdout to be line-buffered, but tradition
leaves stdin alone on systems without fcntl. */
#ifdef HAVE_FCNTL
std (s->_stdout, __SWR, 1, s);
#else
std (s->_stdout, __SWR | __SLBF, 1, s);
#endif
/* POSIX requires stderr to be opened for reading and writing, even
when the underlying fd 2 is write-only. */
std (s->_stderr, __SRW | __SNBF, 2, s);
__sinit_lock_release ();
}
#ifndef __SINGLE_THREAD__
__LOCK_INIT_RECURSIVE(static, __sfp_lock);
__LOCK_INIT_RECURSIVE(static, __sinit_lock);
_VOID
_DEFUN_VOID(__sfp_lock_acquire)
{
__lock_acquire_recursive (__sfp_lock);
}
_VOID
_DEFUN_VOID(__sfp_lock_release)
{
__lock_release_recursive (__sfp_lock);
}
_VOID
_DEFUN_VOID(__sinit_lock_acquire)
{
__lock_acquire_recursive (__sinit_lock);
}
_VOID
_DEFUN_VOID(__sinit_lock_release)
{
__lock_release_recursive (__sinit_lock);
}
/* Walkable file locking routine. */
static int
_DEFUN(__fp_lock, (ptr),
FILE * ptr)
{
_flockfile (ptr);
return 0;
}
/* Walkable file unlocking routine. */
static int
_DEFUN(__fp_unlock, (ptr),
FILE * ptr)
{
_funlockfile (ptr);
return 0;
}
_VOID
_DEFUN_VOID(__fp_lock_all)
{
__sfp_lock_acquire ();
_CAST_VOID _fwalk (_REENT, __fp_lock);
}
_VOID
_DEFUN_VOID(__fp_unlock_all)
{
_CAST_VOID _fwalk (_REENT, __fp_unlock);
__sfp_lock_release ();
}
#endif