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4a5121b5 | 1 | /* Utility to update paths from internal to external forms. |
f6f23ad2 AM |
2 | Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 |
3 | Free Software Foundation, Inc. | |
4a5121b5 | 4 | |
1322177d | 5 | This file is part of GCC. |
4a5121b5 | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU Library General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or (at | |
10 | your option) any later version. | |
4a5121b5 JL |
11 | |
12 | GCC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Library General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Library General Public | |
18 | License along with GCC; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* This file contains routines to update a path, both to canonicalize | |
23 | the directory format and to handle any prefix translation. | |
24 | ||
25 | This file must be compiled with -DPREFIX= to specify the "prefix" | |
26 | value used by configure. If a filename does not begin with this | |
27 | prefix, it will not be affected other than by directory canonicalization. | |
28 | ||
29 | Each caller of 'update_path' may specify both a filename and | |
30 | a translation prefix and consist of the name of the package that contains | |
31 | the file ("@GCC", "@BINUTIL", "@GNU", etc). | |
32 | ||
33 | If the prefix is not specified, the filename will only undergo | |
34 | directory canonicalization. | |
35 | ||
36 | If it is specified, the string given by PREFIX will be replaced | |
37 | by the specified prefix (with a '@' in front unless the prefix begins | |
38 | with a '$') and further translation will be done as follows | |
39 | until none of the two conditions below are met: | |
40 | ||
41 | 1) If the filename begins with '@', the string between the '@' and | |
42 | the end of the name or the first '/' or directory separator will | |
43 | be considered a "key" and looked up as follows: | |
44 | ||
45 | -- If this is a Win32 OS, then the Registry will be examined for | |
6a4d6760 | 46 | an entry of "key" in |
4a5121b5 | 47 | |
f4ab28e3 | 48 | HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\<KEY> |
4a5121b5 | 49 | |
f4ab28e3 MK |
50 | if found, that value will be used. <KEY> defaults to GCC version |
51 | string, but can be overridden at configuration time. | |
4a5121b5 JL |
52 | |
53 | -- If not found (or not a Win32 OS), the environment variable | |
54 | key_ROOT (the value of "key" concatenated with the constant "_ROOT") | |
55 | is tried. If that fails, then PREFIX (see above) is used. | |
56 | ||
57 | 2) If the filename begins with a '$', the rest of the string up | |
58 | to the end or the first '/' or directory separator will be used | |
59 | as an environment variable, whose value will be returned. | |
60 | ||
61 | Once all this is done, any '/' will be converted to DIR_SEPARATOR, | |
6a4d6760 | 62 | if they are different. |
4a5121b5 JL |
63 | |
64 | NOTE: using resolve_keyed_path under Win32 requires linking with | |
65 | advapi32.dll. */ | |
66 | ||
67 | ||
68 | #include "config.h" | |
670ee920 | 69 | #include "system.h" |
4977bab6 ZW |
70 | #include "coretypes.h" |
71 | #include "tm.h" | |
f4ab28e3 | 72 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
4a5121b5 JL |
73 | #include <windows.h> |
74 | #endif | |
460ee112 | 75 | #include "prefix.h" |
4a5121b5 | 76 | |
460ee112 | 77 | static const char *std_prefix = PREFIX; |
6ed4bb9a | 78 | |
13536812 | 79 | static const char *get_key_value PARAMS ((char *)); |
51c04256 | 80 | static char *translate_name PARAMS ((char *)); |
13536812 | 81 | static char *save_string PARAMS ((const char *, int)); |
51c04256 | 82 | static void tr PARAMS ((char *, int, int)); |
4a5121b5 | 83 | |
f4ab28e3 | 84 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
13536812 | 85 | static char *lookup_key PARAMS ((char *)); |
4a5121b5 JL |
86 | static HKEY reg_key = (HKEY) INVALID_HANDLE_VALUE; |
87 | #endif | |
88 | ||
4a5121b5 JL |
89 | /* Given KEY, as above, return its value. */ |
90 | ||
460ee112 | 91 | static const char * |
4a5121b5 JL |
92 | get_key_value (key) |
93 | char *key; | |
94 | { | |
460ee112 | 95 | const char *prefix = 0; |
6ed4bb9a | 96 | char *temp = 0; |
4a5121b5 | 97 | |
f4ab28e3 | 98 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
4a5121b5 JL |
99 | prefix = lookup_key (key); |
100 | #endif | |
101 | ||
102 | if (prefix == 0) | |
d4f2852f | 103 | prefix = getenv (temp = concat (key, "_ROOT", NULL)); |
4a5121b5 JL |
104 | |
105 | if (prefix == 0) | |
6ed4bb9a MM |
106 | prefix = std_prefix; |
107 | ||
108 | if (temp) | |
109 | free (temp); | |
4a5121b5 JL |
110 | |
111 | return prefix; | |
112 | } | |
113 | ||
4a5121b5 JL |
114 | /* Return a copy of a string that has been placed in the heap. */ |
115 | ||
116 | static char * | |
117 | save_string (s, len) | |
460ee112 KG |
118 | const char *s; |
119 | int len; | |
4a5121b5 | 120 | { |
b3694847 | 121 | char *result = xmalloc (len + 1); |
4a5121b5 | 122 | |
4e135bdd | 123 | memcpy (result, s, len); |
4a5121b5 JL |
124 | result[len] = 0; |
125 | return result; | |
126 | } | |
127 | ||
f4ab28e3 | 128 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
4a5121b5 JL |
129 | |
130 | /* Look up "key" in the registry, as above. */ | |
131 | ||
132 | static char * | |
133 | lookup_key (key) | |
134 | char *key; | |
135 | { | |
136 | char *dst; | |
137 | DWORD size; | |
138 | DWORD type; | |
139 | LONG res; | |
140 | ||
141 | if (reg_key == (HKEY) INVALID_HANDLE_VALUE) | |
142 | { | |
143 | res = RegOpenKeyExA (HKEY_LOCAL_MACHINE, "SOFTWARE", 0, | |
144 | KEY_READ, ®_key); | |
145 | ||
146 | if (res == ERROR_SUCCESS) | |
147 | res = RegOpenKeyExA (reg_key, "Free Software Foundation", 0, | |
148 | KEY_READ, ®_key); | |
149 | ||
f4ab28e3 MK |
150 | if (res == ERROR_SUCCESS) |
151 | res = RegOpenKeyExA (reg_key, WIN32_REGISTRY_KEY, 0, | |
152 | KEY_READ, ®_key); | |
153 | ||
4a5121b5 | 154 | if (res != ERROR_SUCCESS) |
6a4d6760 KH |
155 | { |
156 | reg_key = (HKEY) INVALID_HANDLE_VALUE; | |
157 | return 0; | |
158 | } | |
4a5121b5 JL |
159 | } |
160 | ||
161 | size = 32; | |
3ea6b476 | 162 | dst = (char *) xmalloc (size); |
4a5121b5 JL |
163 | |
164 | res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size); | |
165 | if (res == ERROR_MORE_DATA && type == REG_SZ) | |
166 | { | |
3ea6b476 | 167 | dst = (char *) xrealloc (dst, size); |
4a5121b5 JL |
168 | res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size); |
169 | } | |
170 | ||
171 | if (type != REG_SZ || res != ERROR_SUCCESS) | |
172 | { | |
173 | free (dst); | |
174 | dst = 0; | |
175 | } | |
176 | ||
177 | return dst; | |
178 | } | |
179 | #endif | |
180 | ||
51c04256 NB |
181 | /* If NAME, a malloc-ed string, starts with a '@' or '$', apply the |
182 | translation rules above and return a newly malloc-ed name. | |
183 | Otherwise, return the given name. */ | |
4a5121b5 | 184 | |
51c04256 | 185 | static char * |
4a5121b5 | 186 | translate_name (name) |
51c04256 | 187 | char *name; |
4a5121b5 | 188 | { |
51c04256 NB |
189 | char code; |
190 | char *key, *old_name; | |
191 | const char *prefix; | |
4a5121b5 JL |
192 | int keylen; |
193 | ||
51c04256 NB |
194 | for (;;) |
195 | { | |
196 | code = name[0]; | |
197 | if (code != '@' && code != '$') | |
198 | break; | |
199 | ||
200 | for (keylen = 0; | |
201 | (name[keylen + 1] != 0 && !IS_DIR_SEPARATOR (name[keylen + 1])); | |
202 | keylen++) | |
203 | ; | |
204 | ||
205 | key = (char *) alloca (keylen + 1); | |
206 | strncpy (key, &name[1], keylen); | |
207 | key[keylen] = 0; | |
208 | ||
209 | if (code == '@') | |
210 | { | |
211 | prefix = get_key_value (key); | |
212 | if (prefix == 0) | |
213 | prefix = std_prefix; | |
214 | } | |
215 | else | |
216 | prefix = getenv (key); | |
4a5121b5 | 217 | |
51c04256 NB |
218 | if (prefix == 0) |
219 | prefix = PREFIX; | |
4a5121b5 | 220 | |
51c04256 NB |
221 | /* We used to strip trailing DIR_SEPARATORs here, but that can |
222 | sometimes yield a result with no separator when one was coded | |
223 | and intended by the user, causing two path components to run | |
224 | together. */ | |
4a5121b5 | 225 | |
51c04256 NB |
226 | old_name = name; |
227 | name = concat (prefix, &name[keylen + 1], NULL); | |
228 | free (old_name); | |
4a5121b5 | 229 | } |
e5e809f4 | 230 | |
51c04256 NB |
231 | return name; |
232 | } | |
4a5121b5 | 233 | |
51c04256 NB |
234 | /* In a NUL-terminated STRING, replace character C1 with C2 in-place. */ |
235 | static void | |
236 | tr (string, c1, c2) | |
237 | char *string; | |
238 | int c1, c2; | |
239 | { | |
240 | do | |
241 | { | |
242 | if (*string == c1) | |
243 | *string = c2; | |
244 | } | |
245 | while (*string++); | |
4a5121b5 JL |
246 | } |
247 | ||
51c04256 NB |
248 | /* Update PATH using KEY if PATH starts with PREFIX. The returned |
249 | string is always malloc-ed, and the caller is responsible for | |
250 | freeing it. */ | |
4a5121b5 | 251 | |
51c04256 | 252 | char * |
4a5121b5 | 253 | update_path (path, key) |
460ee112 KG |
254 | const char *path; |
255 | const char *key; | |
4a5121b5 | 256 | { |
f6f23ad2 | 257 | char *result, *p; |
51c04256 | 258 | |
6ed4bb9a | 259 | if (! strncmp (path, std_prefix, strlen (std_prefix)) && key != 0) |
4a5121b5 | 260 | { |
51c04256 | 261 | bool free_key = false; |
4a5121b5 | 262 | |
51c04256 NB |
263 | if (key[0] != '$') |
264 | { | |
265 | key = concat ("@", key, NULL); | |
266 | free_key = true; | |
267 | } | |
268 | ||
269 | result = concat (key, &path[strlen (std_prefix)], NULL); | |
270 | if (free_key) | |
271 | free ((char *) key); | |
272 | result = translate_name (result); | |
4a5121b5 | 273 | } |
51c04256 NB |
274 | else |
275 | result = xstrdup (path); | |
509781a4 | 276 | |
f6f23ad2 AM |
277 | #ifndef ALWAYS_STRIP_DOTDOT |
278 | #define ALWAYS_STRIP_DOTDOT 0 | |
279 | #endif | |
280 | ||
281 | p = result; | |
282 | while (1) | |
283 | { | |
284 | char *src, *dest; | |
285 | ||
286 | p = strchr (p, '.'); | |
287 | if (p == NULL) | |
288 | break; | |
f6f23ad2 | 289 | /* Look for `/../' */ |
d4348177 AM |
290 | if (p[1] == '.' |
291 | && IS_DIR_SEPARATOR (p[2]) | |
292 | && (p != result && IS_DIR_SEPARATOR (p[-1]))) | |
f6f23ad2 AM |
293 | { |
294 | *p = 0; | |
295 | if (!ALWAYS_STRIP_DOTDOT && access (result, X_OK) == 0) | |
296 | { | |
297 | *p = '.'; | |
d4348177 | 298 | break; |
f6f23ad2 AM |
299 | } |
300 | else | |
301 | { | |
302 | /* We can't access the dir, so we won't be able to | |
d4348177 AM |
303 | access dir/.. either. Strip out `dir/../'. If `dir' |
304 | turns out to be `.', strip one more path component. */ | |
305 | dest = p; | |
306 | do | |
307 | { | |
308 | --dest; | |
309 | while (dest != result && IS_DIR_SEPARATOR (*dest)) | |
310 | --dest; | |
311 | while (dest != result && !IS_DIR_SEPARATOR (dest[-1])) | |
312 | --dest; | |
313 | } | |
314 | while (dest != result && *dest == '.'); | |
315 | /* If we have something like `./..' or `/..', don't | |
316 | strip anything more. */ | |
317 | if (*dest == '.' || IS_DIR_SEPARATOR (*dest)) | |
318 | { | |
319 | *p = '.'; | |
320 | break; | |
321 | } | |
f6f23ad2 AM |
322 | src = p + 3; |
323 | while (IS_DIR_SEPARATOR (*src)) | |
324 | ++src; | |
325 | p = dest; | |
326 | while ((*dest++ = *src++) != 0) | |
327 | ; | |
328 | } | |
329 | } | |
330 | else | |
331 | ++p; | |
332 | } | |
333 | ||
93284395 | 334 | #ifdef UPDATE_PATH_HOST_CANONICALIZE |
51c04256 | 335 | /* Perform host dependent canonicalization when needed. */ |
f6f23ad2 | 336 | UPDATE_PATH_HOST_CANONICALIZE (result); |
93284395 ME |
337 | #endif |
338 | ||
509781a4 | 339 | #ifdef DIR_SEPARATOR_2 |
dc297297 | 340 | /* Convert DIR_SEPARATOR_2 to DIR_SEPARATOR. */ |
51c04256 NB |
341 | if (DIR_SEPARATOR_2 != DIR_SEPARATOR) |
342 | tr (result, DIR_SEPARATOR_2, DIR_SEPARATOR); | |
509781a4 | 343 | #endif |
51c04256 | 344 | |
509781a4 | 345 | #if defined (DIR_SEPARATOR) && !defined (DIR_SEPARATOR_2) |
4a5121b5 | 346 | if (DIR_SEPARATOR != '/') |
51c04256 | 347 | tr (result, '/', DIR_SEPARATOR); |
4a5121b5 JL |
348 | #endif |
349 | ||
51c04256 | 350 | return result; |
4a5121b5 | 351 | } |
6ed4bb9a MM |
352 | |
353 | /* Reset the standard prefix */ | |
354 | void | |
355 | set_std_prefix (prefix, len) | |
460ee112 KG |
356 | const char *prefix; |
357 | int len; | |
6ed4bb9a MM |
358 | { |
359 | std_prefix = save_string (prefix, len); | |
360 | } |