Rev 4872 | Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4349 | Serge | 1 | /* |
2 | * Copyright (c) 1990 The Regents of the University of California. |
||
3 | * All rights reserved. |
||
4 | * |
||
5 | * Redistribution and use in source and binary forms are permitted |
||
6 | * provided that the above copyright notice and this paragraph are |
||
7 | * duplicated in all such forms and that any documentation, |
||
8 | * advertising materials, and other materials related to such |
||
9 | * distribution and use acknowledge that the software was developed |
||
10 | * by the University of California, Berkeley. The name of the |
||
11 | * University may not be used to endorse or promote products derived |
||
12 | * from this software without specific prior written permission. |
||
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
||
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
||
15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
||
16 | */ |
||
17 | /* No user fns here. Pesch 15apr92. */ |
||
18 | |||
19 | #include <_ansi.h> |
||
20 | #include |
||
21 | #include |
||
22 | #include |
||
23 | #include |
||
24 | #include |
||
25 | #include |
||
26 | #include |
||
27 | #include "local.h" |
||
28 | |||
29 | #ifdef _REENT_SMALL |
||
30 | const struct __sFILE_fake __sf_fake_stdin = |
||
31 | {_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL}; |
||
32 | const struct __sFILE_fake __sf_fake_stdout = |
||
33 | {_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL}; |
||
34 | const struct __sFILE_fake __sf_fake_stderr = |
||
35 | {_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL}; |
||
36 | #endif |
||
37 | |||
38 | static _VOID |
||
39 | _DEFUN(std, (ptr, flags, file, data), |
||
40 | FILE *ptr _AND |
||
41 | int flags _AND |
||
42 | int file _AND |
||
43 | struct _reent *data) |
||
44 | { |
||
45 | ptr->_p = 0; |
||
46 | ptr->_r = 0; |
||
47 | ptr->_w = 0; |
||
48 | ptr->_flags = flags; |
||
49 | ptr->_flags2 = 0; |
||
50 | ptr->_file = file; |
||
51 | ptr->_bf._base = 0; |
||
52 | ptr->_bf._size = 0; |
||
53 | ptr->_lbfsize = 0; |
||
54 | memset (&ptr->_mbstate, 0, sizeof (_mbstate_t)); |
||
55 | ptr->_cookie = ptr; |
||
56 | ptr->_read = __sread; |
||
57 | #ifndef __LARGE64_FILES |
||
58 | ptr->_write = __swrite; |
||
59 | #else /* __LARGE64_FILES */ |
||
60 | ptr->_write = __swrite64; |
||
61 | ptr->_seek64 = __sseek64; |
||
62 | ptr->_flags |= __SL64; |
||
63 | #endif /* __LARGE64_FILES */ |
||
64 | ptr->_seek = __sseek; |
||
65 | ptr->_close = __sclose; |
||
66 | #if !defined(__SINGLE_THREAD__) && !defined(_REENT_SMALL) |
||
67 | __lock_init_recursive (ptr->_lock); |
||
68 | /* |
||
69 | * #else |
||
70 | * lock is already initialized in __sfp |
||
71 | */ |
||
72 | #endif |
||
73 | |||
74 | #ifdef __SCLE |
||
75 | if (__stextmode (ptr->_file)) |
||
76 | ptr->_flags |= __SCLE; |
||
77 | #endif |
||
78 | } |
||
79 | |||
80 | struct _glue * |
||
81 | _DEFUN(__sfmoreglue, (d, n), |
||
82 | struct _reent *d _AND |
||
83 | register int n) |
||
84 | { |
||
85 | struct _glue *g; |
||
86 | FILE *p; |
||
87 | |||
88 | g = (struct _glue *) _malloc_r (d, sizeof (*g) + n * sizeof (FILE)); |
||
89 | if (g == NULL) |
||
90 | return NULL; |
||
91 | p = (FILE *) (g + 1); |
||
92 | g->_next = NULL; |
||
93 | g->_niobs = n; |
||
94 | g->_iobs = p; |
||
95 | memset (p, 0, n * sizeof (FILE)); |
||
96 | return g; |
||
97 | } |
||
98 | |||
99 | /* |
||
100 | * Find a free FILE for fopen et al. |
||
101 | */ |
||
102 | |||
103 | FILE * |
||
104 | _DEFUN(__sfp, (d), |
||
105 | struct _reent *d) |
||
106 | { |
||
107 | FILE *fp; |
||
108 | int n; |
||
109 | struct _glue *g; |
||
110 | |||
111 | __sfp_lock_acquire (); |
||
112 | |||
113 | if (!_GLOBAL_REENT->__sdidinit) |
||
114 | __sinit (_GLOBAL_REENT); |
||
115 | for (g = &_GLOBAL_REENT->__sglue;; g = g->_next) |
||
116 | { |
||
117 | for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++) |
||
118 | if (fp->_flags == 0) |
||
119 | goto found; |
||
120 | if (g->_next == NULL && |
||
121 | (g->_next = __sfmoreglue (d, NDYNAMIC)) == NULL) |
||
122 | break; |
||
123 | } |
||
124 | __sfp_lock_release (); |
||
125 | d->_errno = ENOMEM; |
||
126 | return NULL; |
||
127 | |||
128 | found: |
||
129 | fp->_file = -1; /* no file */ |
||
130 | fp->_flags = 1; /* reserve this slot; caller sets real flags */ |
||
131 | fp->_flags2 = 0; |
||
132 | #ifndef __SINGLE_THREAD__ |
||
133 | __lock_init_recursive (fp->_lock); |
||
134 | #endif |
||
135 | __sfp_lock_release (); |
||
136 | |||
137 | fp->_p = NULL; /* no current pointer */ |
||
138 | fp->_w = 0; /* nothing to read or write */ |
||
139 | fp->_r = 0; |
||
140 | fp->_bf._base = NULL; /* no buffer */ |
||
141 | fp->_bf._size = 0; |
||
142 | fp->_lbfsize = 0; /* not line buffered */ |
||
143 | memset (&fp->_mbstate, 0, sizeof (_mbstate_t)); |
||
144 | /* fp->_cookie = |
||
145 | fp->_ub._base = NULL; /* no ungetc buffer */ |
||
146 | fp->_ub._size = 0; |
||
147 | fp->_lb._base = NULL; /* no line buffer */ |
||
148 | fp->_lb._size = 0; |
||
149 | |||
150 | return fp; |
||
151 | } |
||
152 | |||
153 | /* |
||
154 | * exit() calls _cleanup() through *__cleanup, set whenever we |
||
155 | * open or buffer a file. This chicanery is done so that programs |
||
156 | * that do not use stdio need not link it all in. |
||
157 | * |
||
158 | * The name `_cleanup' is, alas, fairly well known outside stdio. |
||
159 | */ |
||
160 | |||
161 | _VOID |
||
162 | _DEFUN(_cleanup_r, (ptr), |
||
163 | struct _reent *ptr) |
||
164 | { |
||
165 | _CAST_VOID _fwalk(ptr, fclose); |
||
166 | /* _CAST_VOID _fwalk (ptr, fflush); */ /* `cheating' */ |
||
167 | } |
||
168 | |||
169 | #ifndef _REENT_ONLY |
||
170 | _VOID |
||
171 | _DEFUN_VOID(_cleanup) |
||
172 | { |
||
173 | _cleanup_r (_GLOBAL_REENT); |
||
174 | } |
||
175 | #endif |
||
176 | |||
177 | /* |
||
178 | * __sinit() is called whenever stdio's internal variables must be set up. |
||
179 | */ |
||
180 | |||
181 | _VOID |
||
182 | _DEFUN(__sinit, (s), |
||
183 | struct _reent *s) |
||
184 | { |
||
185 | __sinit_lock_acquire (); |
||
186 | |||
187 | if (s->__sdidinit) |
||
188 | { |
||
189 | __sinit_lock_release (); |
||
190 | return; |
||
191 | } |
||
192 | |||
193 | /* make sure we clean up on exit */ |
||
194 | s->__cleanup = _cleanup_r; /* conservative */ |
||
195 | s->__sdidinit = 1; |
||
196 | |||
197 | s->__sglue._next = NULL; |
||
198 | #ifndef _REENT_SMALL |
||
199 | s->__sglue._niobs = 3; |
||
200 | s->__sglue._iobs = &s->__sf[0]; |
||
201 | #else |
||
202 | s->__sglue._niobs = 0; |
||
203 | s->__sglue._iobs = NULL; |
||
204 | s->_stdin = __sfp(s); |
||
205 | s->_stdout = __sfp(s); |
||
206 | s->_stderr = __sfp(s); |
||
207 | #endif |
||
208 | |||
209 | std (s->_stdin, __SRD, 0, s); |
||
210 | |||
211 | /* On platforms that have true file system I/O, we can verify |
||
212 | whether stdout is an interactive terminal or not, as part of |
||
213 | __smakebuf on first use of the stream. For all other platforms, |
||
214 | we will default to line buffered mode here. Technically, POSIX |
||
215 | requires both stdin and stdout to be line-buffered, but tradition |
||
216 | leaves stdin alone on systems without fcntl. */ |
||
217 | #ifdef HAVE_FCNTL |
||
218 | std (s->_stdout, __SWR, 1, s); |
||
219 | #else |
||
220 | std (s->_stdout, __SWR | __SLBF, 1, s); |
||
221 | #endif |
||
222 | |||
223 | /* POSIX requires stderr to be opened for reading and writing, even |
||
224 | when the underlying fd 2 is write-only. */ |
||
225 | std (s->_stderr, __SRW | __SNBF, 2, s); |
||
226 | |||
227 | __sinit_lock_release (); |
||
228 | } |
||
229 | |||
230 | #ifndef __SINGLE_THREAD__ |
||
231 | |||
232 | __LOCK_INIT_RECURSIVE(static, __sfp_lock); |
||
233 | __LOCK_INIT_RECURSIVE(static, __sinit_lock); |
||
234 | |||
235 | _VOID |
||
236 | _DEFUN_VOID(__sfp_lock_acquire) |
||
237 | { |
||
238 | __lock_acquire_recursive (__sfp_lock); |
||
239 | } |
||
240 | |||
241 | _VOID |
||
242 | _DEFUN_VOID(__sfp_lock_release) |
||
243 | { |
||
244 | __lock_release_recursive (__sfp_lock); |
||
245 | } |
||
246 | |||
247 | _VOID |
||
248 | _DEFUN_VOID(__sinit_lock_acquire) |
||
249 | { |
||
250 | __lock_acquire_recursive (__sinit_lock); |
||
251 | } |
||
252 | |||
253 | _VOID |
||
254 | _DEFUN_VOID(__sinit_lock_release) |
||
255 | { |
||
256 | __lock_release_recursive (__sinit_lock); |
||
257 | } |
||
258 | |||
259 | /* Walkable file locking routine. */ |
||
260 | static int |
||
261 | _DEFUN(__fp_lock, (ptr), |
||
262 | FILE * ptr) |
||
263 | { |
||
264 | _flockfile (ptr); |
||
265 | |||
266 | return 0; |
||
267 | } |
||
268 | |||
269 | /* Walkable file unlocking routine. */ |
||
270 | static int |
||
271 | _DEFUN(__fp_unlock, (ptr), |
||
272 | FILE * ptr) |
||
273 | { |
||
274 | _funlockfile (ptr); |
||
275 | |||
276 | return 0; |
||
277 | } |
||
278 | |||
279 | _VOID |
||
280 | _DEFUN_VOID(__fp_lock_all) |
||
281 | { |
||
282 | __sfp_lock_acquire (); |
||
283 | |||
284 | _CAST_VOID _fwalk (_REENT, __fp_lock); |
||
285 | } |
||
286 | |||
287 | _VOID |
||
288 | _DEFUN_VOID(__fp_unlock_all) |
||
289 | { |
||
290 | _CAST_VOID _fwalk (_REENT, __fp_unlock); |
||
291 | |||
292 | __sfp_lock_release (); |
||
293 | } |
||
294 | #endif |