1 | /*␊ |
2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.␊ |
7 | * ␊ |
8 | * This file contains Original Code and/or Modifications of Original Code␊ |
9 | * as defined in and that are subject to the Apple Public Source License␊ |
10 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
11 | * compliance with the License. Please obtain a copy of the License at␊ |
12 | * http://www.opensource.apple.com/apsl/ and read it before using this␊ |
13 | * file.␊ |
14 | * ␊ |
15 | * The Original Code and all software distributed under the License are␊ |
16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
20 | * Please see the License for the specific language governing rights and␊ |
21 | * limitations under the License.␊ |
22 | * ␊ |
23 | * @APPLE_LICENSE_HEADER_END@␊ |
24 | */␊ |
25 | /*␊ |
26 | * Copyright (c) 1990, 1993␊ |
27 | *␉The Regents of the University of California. All rights reserved.␊ |
28 | *␊ |
29 | * This code is derived from software contributed to Berkeley by␊ |
30 | * Chris Torek.␊ |
31 | *␊ |
32 | * Redistribution and use in source and binary forms, with or without␊ |
33 | * modification, are permitted provided that the following conditions␊ |
34 | * are met:␊ |
35 | * 1. Redistributions of source code must retain the above copyright␊ |
36 | * notice, this list of conditions and the following disclaimer.␊ |
37 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
38 | * notice, this list of conditions and the following disclaimer in the␊ |
39 | * documentation and/or other materials provided with the distribution.␊ |
40 | * 3. All advertising materials mentioning features or use of this software␊ |
41 | * must display the following acknowledgement:␊ |
42 | *␉This product includes software developed by the University of␊ |
43 | *␉California, Berkeley and its contributors.␊ |
44 | * 4. Neither the name of the University nor the names of its contributors␊ |
45 | * may be used to endorse or promote products derived from this software␊ |
46 | * without specific prior written permission.␊ |
47 | *␊ |
48 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND␊ |
49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE␊ |
52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
58 | * SUCH DAMAGE.␊ |
59 | */␊ |
60 | ␊ |
61 | ␊ |
62 | #include <sys/param.h>␊ |
63 | #include <unistd.h>␊ |
64 | #include <stdio.h>␊ |
65 | #include <errno.h>␊ |
66 | #include <stdlib.h>␊ |
67 | #include <string.h>␊ |
68 | #include "local.h"␊ |
69 | #include "glue.h"␊ |
70 | ␊ |
71 | int␉__sdidinit = 0;␊ |
72 | void␉(*__cleanup)(void);␊ |
73 | ␊ |
74 | #define␉NDYNAMIC 10␉␉/* add ten more whenever necessary */␊ |
75 | ␊ |
76 | #define␉std(flags, file) \␊ |
77 | {0,0,0,flags,file,{0},0,__sF+file,__sclose,__sread,__sseek,__swrite}␊ |
78 | /*␉ p r w flags file _bf z cookie close read seek write */␊ |
79 | ␊ |
80 | /* the usual - (stdin + stdout + stderr) */␊ |
81 | static FILE usual[FOPEN_MAX - 3];␊ |
82 | static struct glue uglue = { 0, FOPEN_MAX - 3, usual };␊ |
83 | ␊ |
84 | FILE __sF[3] = {␊ |
85 | ␉std(__SRD, STDIN_FILENO),␉␉/* stdin */␊ |
86 | ␉std(__SWR, STDOUT_FILENO),␉␉/* stdout */␊ |
87 | ␉std(__SWR|__SNBF, STDERR_FILENO)␉/* stderr */␊ |
88 | };␊ |
89 | struct glue __sglue = { &uglue, 3, __sF };␊ |
90 | ␊ |
91 | FILE *__stdinp = &__sF[0];␊ |
92 | FILE *__stdoutp = &__sF[1];␊ |
93 | FILE *__stderrp = &__sF[2];␊ |
94 | ␊ |
95 | static struct glue *␊ |
96 | moreglue(n)␊ |
97 | register int n;␊ |
98 | {␊ |
99 | ␉register struct glue *g;␊ |
100 | ␉register FILE *p;␊ |
101 | ␉static FILE empty;␊ |
102 | ␉␊ |
103 | ␉g = (struct glue *)malloc(sizeof(*g) + ALIGNBYTES + n * sizeof(FILE));␊ |
104 | ␉if (g == NULL)␊ |
105 | ␉␉return (NULL);␊ |
106 | ␉p = (FILE *)ALIGN(g + 1);␊ |
107 | ␉g->next = NULL;␊ |
108 | ␉g->niobs = n;␊ |
109 | ␉g->iobs = p;␊ |
110 | ␉while (--n >= 0)␊ |
111 | ␉␉*p++ = empty;␊ |
112 | ␉return (g);␊ |
113 | }␊ |
114 | ␊ |
115 | /*␊ |
116 | * Find a free FILE for fopen et al.␊ |
117 | */␊ |
118 | FILE *␊ |
119 | __sfp(int count /* only for a compatibility issue */)␊ |
120 | {␊ |
121 | ␉register FILE *fp;␊ |
122 | ␉register int n;␊ |
123 | ␉register struct glue *g;␊ |
124 | ␉␊ |
125 | ␉(void)count;␊ |
126 | ␉␊ |
127 | ␉if (!__sdidinit)␊ |
128 | ␉␉__sinit();␊ |
129 | ␉for (g = &__sglue;; g = g->next) {␊ |
130 | ␉␉for (fp = g->iobs, n = g->niobs; --n >= 0; fp++)␊ |
131 | ␉␉␉if (fp->_flags == 0)␊ |
132 | ␉␉␉␉goto found;␊ |
133 | ␉␉if (g->next == NULL && (g->next = moreglue(NDYNAMIC)) == NULL)␊ |
134 | ␉␉␉break;␊ |
135 | ␉}␊ |
136 | ␉return (NULL);␊ |
137 | found:␊ |
138 | ␉fp->_flags = 1;␉␉/* reserve this slot; caller sets real flags */␊ |
139 | ␉fp->_p = NULL;␉␉/* no current pointer */␊ |
140 | ␉fp->_w = 0;␉␉/* nothing to read or write */␊ |
141 | ␉fp->_r = 0;␊ |
142 | ␉fp->_bf._base = NULL;␉/* no buffer */␊ |
143 | ␉fp->_bf._size = 0;␊ |
144 | ␉fp->_lbfsize = 0;␉/* not line buffered */␊ |
145 | ␉fp->_file = -1;␉␉/* no file */␊ |
146 | ␉/*␉fp->_cookie = <any>; */␉/* caller sets cookie, _read/_write etc */␊ |
147 | ␉fp->_ub._base = NULL;␉/* no ungetc buffer */␊ |
148 | ␉fp->_ub._size = 0;␊ |
149 | ␉fp->_lb._base = NULL;␉/* no line buffer */␊ |
150 | ␉fp->_lb._size = 0;␊ |
151 | ␉return (fp);␊ |
152 | }␊ |
153 | ␊ |
154 | /*␊ |
155 | * Mark as free and update count as needed␊ |
156 | */␊ |
157 | __private_extern__ void␊ |
158 | __sfprelease(FILE *fp)␊ |
159 | {␊ |
160 | ␉if (fp->_counted) {␉␉␊ |
161 | ␉␉fp->_counted = 0;␊ |
162 | ␉}␊ |
163 | ␉fp->_flags = 0;␊ |
164 | }␊ |
165 | ␊ |
166 | /*␊ |
167 | * exit() calls _cleanup() through *__cleanup, set whenever we␊ |
168 | * open or buffer a file. This chicanery is done so that programs␊ |
169 | * that do not use stdio need not link it all in.␊ |
170 | *␊ |
171 | * The name `_cleanup' is, alas, fairly well known outside stdio.␊ |
172 | */␊ |
173 | ␊ |
174 | void␊ |
175 | _cleanup(void)␊ |
176 | {␊ |
177 | ␉/* (void) _fwalk(fclose); */␊ |
178 | ␉(void) _fwalk(__sflush);␉␉/* `cheating' */␊ |
179 | }␊ |
180 | ␊ |
181 | /*␊ |
182 | * __sinit() is called whenever stdio's internal variables must be set up.␊ |
183 | */␊ |
184 | void␊ |
185 | __sinit(void)␊ |
186 | {␊ |
187 | ␉if (__sdidinit == 0) {␊ |
188 | ␉␉/* make sure we clean up on exit */␊ |
189 | ␉␉__cleanup = _cleanup;␉␉/* conservative */␊ |
190 | ␉␉__sdidinit = 1;␊ |
191 | ␉}␊ |
192 | }␊ |
193 | |