1 /****************************************************************************
2 * *
3 * GNAT RUN-TIME COMPONENTS *
4 * *
5 * C S T R E A M S *
6 * *
7 * Auxiliary C functions for Interfaces.C.Streams *
8 * *
9 * Copyright (C) 1992-2012, Free Software Foundation, Inc. *
10 * *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 3, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. *
17 * *
18 * As a special exception under Section 7 of GPL version 3, you are granted *
19 * additional permissions described in the GCC Runtime Library Exception, *
20 * version 3.1, as published by the Free Software Foundation. *
21 * *
22 * You should have received a copy of the GNU General Public License and *
23 * a copy of the GCC Runtime Library Exception along with this program; *
24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
25 * <http://www.gnu.org/licenses/>. *
26 * *
27 * GNAT was originally developed by the GNAT team at New York University. *
28 * Extensive contributions were provided by Ada Core Technologies Inc. *
29 * *
30 ****************************************************************************/
31
32 /* Routines required for implementing routines in Interfaces.C.Streams. */
33
34 #ifdef __vxworks
35 #include "vxWorks.h"
36 #endif
37
38 #ifdef IN_RTS
39 #include "tconfig.h"
40 #include "tsystem.h"
41 #include <sys/stat.h>
42 #else
43 #include "config.h"
44 #include "system.h"
45 #endif
46
47 #include "adaint.h"
48
49 #ifdef __cplusplus
50 extern "C" {
51 #endif
52
53 #ifdef VMS
54 #include <unixlib.h>
55 #endif
56
57 #ifdef linux
58 /* Don't use macros on GNU/Linux since they cause incompatible changes between
59 glibc 2.0 and 2.1 */
60
61 #ifdef stderr
62 # undef stderr
63 #endif
64 #ifdef stdin
65 # undef stdin
66 #endif
67 #ifdef stdout
68 # undef stdout
69 #endif
70
71 #endif
72
73 /* Don't use macros versions of this functions on VxWorks since they cause
74 imcompatible changes in some VxWorks versions */
75 #ifdef __vxworks
76 #undef getchar
77 #undef putchar
78 #undef feof
79 #undef ferror
80 #undef fileno
81 #endif
82
83 /* The _IONBF value in MINGW32 stdio.h is wrong. */
84 #if defined (WINNT) || defined (_WINNT)
85 #if OLD_MINGW
86 #undef _IONBF
87 #define _IONBF 0004
88 #endif
89 #endif
90
91 int
__gnat_feof(FILE * stream)92 __gnat_feof (FILE *stream)
93 {
94 return (feof (stream));
95 }
96
97 int
__gnat_ferror(FILE * stream)98 __gnat_ferror (FILE *stream)
99 {
100 return (ferror (stream));
101 }
102
103 int
__gnat_fileno(FILE * stream)104 __gnat_fileno (FILE *stream)
105 {
106 return (fileno (stream));
107 }
108
109 int
__gnat_is_regular_file_fd(int fd)110 __gnat_is_regular_file_fd (int fd)
111 {
112 int ret;
113 GNAT_STRUCT_STAT statbuf;
114
115 ret = GNAT_FSTAT (fd, &statbuf);
116 return (!ret && S_ISREG (statbuf.st_mode));
117 }
118
119 /* on some systems, the constants for seek are not defined, if so, then
120 provide the conventional definitions */
121
122 #ifndef SEEK_SET
123 #define SEEK_SET 0 /* Set file pointer to offset */
124 #define SEEK_CUR 1 /* Set file pointer to its current value plus offset */
125 #define SEEK_END 2 /* Set file pointer to the size of the file plus offset */
126 #endif
127
128 /* if L_tmpnam is not set, use a large number that should be safe */
129 #ifndef L_tmpnam
130 #define L_tmpnam 256
131 #endif
132
133 int __gnat_constant_eof = EOF;
134 int __gnat_constant_iofbf = _IOFBF;
135 int __gnat_constant_iolbf = _IOLBF;
136 int __gnat_constant_ionbf = _IONBF;
137 int __gnat_constant_l_tmpnam = L_tmpnam;
138 int __gnat_constant_seek_cur = SEEK_CUR;
139 int __gnat_constant_seek_end = SEEK_END;
140 int __gnat_constant_seek_set = SEEK_SET;
141
142 FILE *
__gnat_constant_stderr(void)143 __gnat_constant_stderr (void)
144 {
145 return stderr;
146 }
147
148 FILE *
__gnat_constant_stdin(void)149 __gnat_constant_stdin (void)
150 {
151 return stdin;
152 }
153
154 FILE *
__gnat_constant_stdout(void)155 __gnat_constant_stdout (void)
156 {
157 return stdout;
158 }
159
160 char *
__gnat_full_name(char * nam,char * buffer)161 __gnat_full_name (char *nam, char *buffer)
162 {
163 #ifdef RTSS
164 /* RTSS applications have no current-directory notion, so RTSS file I/O
165 requests must use fully qualified path names, such as:
166 c:\temp\MyFile.txt (for a file system object)
167 \\.\MyDevice0 (for a device object)
168 */
169 if (nam[1] == ':' || nam[0] == '\\')
170 strcpy (buffer, nam);
171 else
172 buffer[0] = '\0';
173
174 #elif defined (__MINGW32__)
175 /* If this is a device file return it as is;
176 under Windows NT a device file ends with ":". */
177 if (nam[strlen (nam) - 1] == ':')
178 strcpy (buffer, nam);
179 else
180 {
181 char *p;
182
183 _fullpath (buffer, nam, __gnat_max_path_len);
184
185 for (p = buffer; *p; p++)
186 if (*p == '/')
187 *p = '\\';
188 }
189
190 #elif defined (__FreeBSD__)
191
192 /* Use realpath function which resolves links and references to . and ..
193 on those Unix systems that support it. Note that GNU/Linux provides it but
194 cannot handle more than 5 symbolic links in a full name, so we use the
195 getcwd approach instead. */
196 realpath (nam, buffer);
197
198 #elif defined (VMS)
199 strncpy (buffer, __gnat_to_canonical_file_spec (nam), __gnat_max_path_len);
200
201 if (buffer[0] == '/' || strchr (buffer, '!')) /* '!' means decnet node */
202 strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
203 else
204 {
205 char *nambuffer = alloca (__gnat_max_path_len);
206
207 strncpy (nambuffer, buffer, __gnat_max_path_len);
208 strncpy
209 (buffer, getcwd (buffer, __gnat_max_path_len, 0), __gnat_max_path_len);
210 strncat (buffer, "/", __gnat_max_path_len);
211 strncat (buffer, nambuffer, __gnat_max_path_len);
212 strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
213 }
214
215 #elif defined (__vxworks)
216
217 /* On VxWorks systems, an absolute path can be represented (depending on
218 the host platform) as either /dir/file, or device:/dir/file, or
219 device:drive_letter:/dir/file. Use the __gnat_is_absolute_path
220 to verify it. */
221
222 int length;
223
224 if (__gnat_is_absolute_path (nam, strlen (nam)))
225 strcpy (buffer, nam);
226
227 else
228 {
229 length = __gnat_max_path_len;
230 __gnat_get_current_dir (buffer, &length);
231 strncat (buffer, nam, __gnat_max_path_len - length - 1);
232 }
233
234 #else
235 if (nam[0] != '/')
236 {
237 char *p = getcwd (buffer, __gnat_max_path_len);
238
239 if (p == 0)
240 {
241 buffer[0] = '\0';
242 return 0;
243 }
244
245
246 /* If the name returned is an absolute path, it is safe to append '/'
247 to the path and concatenate the name of the file. */
248 if (buffer[0] == '/')
249 strcat (buffer, "/");
250
251 strcat (buffer, nam);
252 }
253 else
254 strcpy (buffer, nam);
255 #endif
256
257 return buffer;
258 }
259
260 #ifdef _WIN64
261 /* On Windows 64 we want to use the fseek/fteel supporting large files. This
262 issue is due to the fact that a long on Win64 is still a 32 bits value */
263 __int64
__gnat_ftell64(FILE * stream)264 __gnat_ftell64 (FILE *stream)
265 {
266 return _ftelli64 (stream);
267 }
268
269 int
__gnat_fseek64(FILE * stream,__int64 offset,int origin)270 __gnat_fseek64 (FILE *stream, __int64 offset, int origin)
271 {
272 return _fseeki64 (stream, offset, origin);
273 }
274
275 #else
276 long
__gnat_ftell64(FILE * stream)277 __gnat_ftell64 (FILE *stream)
278 {
279 return ftell (stream);
280 }
281
282 int
__gnat_fseek64(FILE * stream,long offset,int origin)283 __gnat_fseek64 (FILE *stream, long offset, int origin)
284 {
285 return fseek (stream, offset, origin);
286 }
287 #endif
288
289 #ifdef __cplusplus
290 }
291 #endif
292