usr/src/lib/libc/port/stdio/data.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
  32  * Use is subject to license terms.
  33  */
  34
  35 #pragma weak __iob = _iob
  36
  37 #include "lint.h"
  38 #include "mbstatet.h"
  39 #include "mtlib.h"
  40 #include "file64.h"
  41 #include <stdio.h>
  42 #include <thread.h>
  43 #include <synch.h>
  44 #include "stdiom.h"
  45 #include <wchar.h>
  46
  47 /*
  48  * Ptrs to start of preallocated buffers for stdin, stdout.
  49  * Some slop is allowed at the end of the buffers in case an upset in
  50  * the synchronization of _cnt and _ptr (caused by an interrupt or other
  51  * signal) is not immediately detected.
  52  */
  53
  54 Uchar _sibuf[BUFSIZ + _SMBFSZ], _sobuf[BUFSIZ + _SMBFSZ];
  55 Uchar _smbuf[_NFILE + 1][_SMBFSZ] = {0};  /* shared library compatibility */
  56
  57
  58 #define DEFAULTMBSTATE \
  59         { 0 }
  60
  61 #ifdef  _LP64
  62
  63 #if _NFILE != 20
  64 #error "_iob[] initialization impossible"
  65 #endif
  66
  67 FILE _iob[_NFILE] = {
  68         { NULL, NULL, NULL, 0, 0, _IOREAD, RECURSIVEMUTEX, DEFAULTMBSTATE },
  69         { NULL, NULL, NULL, 0, 1, _IOWRT, RECURSIVEMUTEX, DEFAULTMBSTATE },
  70         { NULL, NULL, NULL, 0, 2, _IOWRT|_IONBF, RECURSIVEMUTEX,
  71                 DEFAULTMBSTATE },
  72         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  73         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  74         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  75         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  76         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  77         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  78         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  79         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  80         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  81         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  82         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  83         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  84         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  85         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  86         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  87         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE },
  88         { NULL, NULL, NULL, 0, 0, 0, RECURSIVEMUTEX, DEFAULTMBSTATE }
  89 };
  90
  91 #else
  92
  93 #if _NFILE != 20 && _NFILE != 60
  94 #error "_iob[] initialization impossible"
  95 #endif
  96
  97 /*
  98  * FILEs not in _iob will never reference this table, so we only need _NFILE
  99  * entries.
 100  */
 101 struct xFILEdata _xftab[_NFILE] = {
 102         XFILEINITIALIZER, XFILEINITIALIZER,
 103         { 0, _smbuf[2] + _SBFSIZ, RECURSIVEMUTEX, DEFAULTMBSTATE }, /* stderr */
 104         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 105         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 106         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 107         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 108 #if _NFILE == 60
 109         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 110         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 111         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 112         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 113         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 114         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 115         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 116         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 117         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 118         XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER, XFILEINITIALIZER,
 119 #endif
 120         XFILEINITIALIZER };
 121
 122 /*
 123  * Ptrs to end of read/write buffers for first _NFILE devices.
 124  * There is an extra bufend pointer which corresponds to the dummy
 125  * file number _NFILE, which is used by sscanf and sprintf.
 126  * Our implementation makes sure it never references _realbufend/_reallock/
 127  * etc for *sscanf() and *sprintf(); such use of a shared item would not be
 128  * thread safe.
 129  */
 130 Uchar *_bufendtab[_NFILE+1] = { NULL, NULL, _smbuf[2] + _SBFSIZ, };
 131
 132 FILE _iob[_NFILE] = {
 133         { 0, NULL, NULL, _IOREAD, 0 },
 134         { 0, NULL, NULL, _IOWRT, 1 },
 135         { 0, NULL, NULL, _IOWRT|_IONBF, 2 },
 136 };
 137
 138 /*
 139  * Ptr to end of io control blocks
 140  */
 141 FILE *_lastbuf = &_iob[_NFILE];
 142
 143 #endif  /*      _LP64   */
 144
 145 /*
 146  * Standard in/out/err
 147  *
 148  * For now, they are pointers into _iob[] for backwards compatibility.
 149  */
 150 FILE *__stdinp = &_iob[0];
 151 FILE *__stdoutp = &_iob[1];
 152 FILE *__stderrp = &_iob[2];