forked from KolibriOS/kolibrios
295 lines
6.8 KiB
C
295 lines
6.8 KiB
C
/*
|
|
* 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
|