1 /**
2  * \file
3  *
4  * Runtime and assembly configuration file support routines.
5  *
6  * Author: Paolo Molaro (lupus@ximian.com)
7  *
8  * Copyright 2002-2003 Ximian, Inc (http://www.ximian.com)
9  * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
10  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
11  */
12 #include "config.h"
13 #include <glib.h>
14 #include <string.h>
15 
16 #include "mono/metadata/assembly.h"
17 #include "mono/metadata/loader.h"
18 #include "mono/metadata/mono-config.h"
19 #include "mono/metadata/metadata-internals.h"
20 #include "mono/metadata/object-internals.h"
21 #include "mono/utils/mono-logger-internals.h"
22 
23 #if defined(TARGET_PS3)
24 #define CONFIG_OS "CellOS"
25 #elif defined(__linux__)
26 #define CONFIG_OS "linux"
27 #elif defined(__APPLE__)
28 #define CONFIG_OS "osx"
29 #elif defined(sun)
30 #define CONFIG_OS "solaris"
31 #elif defined(__FreeBSD__)
32 #define CONFIG_OS "freebsd"
33 #elif defined(__NetBSD__)
34 #define CONFIG_OS "netbsd"
35 #elif defined(__OpenBSD__)
36 #define CONFIG_OS "openbsd"
37 #elif defined(__WIN32__) || defined(TARGET_WIN32)
38 #define CONFIG_OS "windows"
39 #elif defined(_IBMR2)
40 #define CONFIG_OS "aix"
41 #elif defined(__hpux)
42 #define CONFIG_OS "hpux"
43 #elif defined(__HAIKU__)
44 #define CONFIG_OS "haiku"
45 #elif defined (TARGET_WASM)
46 #define CONFIG_OS "wasm"
47 #else
48 #warning Unknown operating system
49 #define CONFIG_OS "unknownOS"
50 #endif
51 
52 #ifndef CONFIG_CPU
53 #if defined(__i386__) || defined(TARGET_X86)
54 #define CONFIG_CPU "x86"
55 #define CONFIG_WORDSIZE "32"
56 #elif defined(__x86_64__) || defined(TARGET_AMD64)
57 #define CONFIG_CPU "x86-64"
58 #define CONFIG_WORDSIZE "64"
59 #elif defined(sparc) || defined(__sparc__)
60 #define CONFIG_CPU "sparc"
61 #define CONFIG_WORDSIZE "32"
62 #elif defined(__ppc64__) || defined(__powerpc64__) || defined(TARGET_POWERPC)
63 #define CONFIG_WORDSIZE "64"
64 #ifdef __mono_ppc_ilp32__
65 #   define CONFIG_CPU "ppc64ilp32"
66 #else
67 #   define CONFIG_CPU "ppc64"
68 #endif
69 #elif defined(__ppc__) || defined(__powerpc__)
70 #define CONFIG_CPU "ppc"
71 #define CONFIG_WORDSIZE "32"
72 #elif defined(__s390x__)
73 #define CONFIG_CPU "s390x"
74 #define CONFIG_WORDSIZE "64"
75 #elif defined(__s390__)
76 #define CONFIG_CPU "s390"
77 #define CONFIG_WORDSIZE "32"
78 #elif defined(__arm__)
79 #define CONFIG_CPU "arm"
80 #define CONFIG_WORDSIZE "32"
81 #elif defined(__aarch64__)
82 #define CONFIG_CPU "armv8"
83 #define CONFIG_WORDSIZE "64"
84 #elif defined(mips) || defined(__mips) || defined(_mips)
85 #define CONFIG_CPU "mips"
86 #define CONFIG_WORDSIZE "32"
87 #elif defined(TARGET_WASM)
88 #define CONFIG_CPU "wasm"
89 #define CONFIG_WORDSIZE "32"
90 #else
91 #error Unknown CPU
92 #define CONFIG_CPU "unknownCPU"
93 #endif
94 #endif
95 
96 /**
97  * mono_config_get_os:
98  *
99  * Returns the operating system that Mono is running on, as used for dllmap entries.
100  */
101 const char *
mono_config_get_os(void)102 mono_config_get_os (void)
103 {
104 	return CONFIG_OS;
105 }
106 
107 /**
108  * mono_config_get_cpu:
109  *
110  * Returns the architecture that Mono is running on, as used for dllmap entries.
111  */
112 const char *
mono_config_get_cpu(void)113 mono_config_get_cpu (void)
114 {
115 	return CONFIG_CPU;
116 }
117 
118 /**
119  * mono_config_get_wordsize:
120  *
121  * Returns the word size that Mono is running on, as used for dllmap entries.
122  */
123 const char *
mono_config_get_wordsize(void)124 mono_config_get_wordsize (void)
125 {
126 	return CONFIG_WORDSIZE;
127 }
128 
129 static void start_element (GMarkupParseContext *context,
130                            const gchar         *element_name,
131 			   const gchar        **attribute_names,
132 			   const gchar        **attribute_values,
133 			   gpointer             user_data,
134 			   GError             **error);
135 
136 static void end_element   (GMarkupParseContext *context,
137                            const gchar         *element_name,
138 			   gpointer             user_data,
139 			   GError             **error);
140 
141 static void parse_text    (GMarkupParseContext *context,
142                            const gchar         *text,
143 			   gsize                text_len,
144 			   gpointer             user_data,
145 			   GError             **error);
146 
147 static void passthrough   (GMarkupParseContext *context,
148                            const gchar         *text,
149 			   gsize                text_len,
150 			   gpointer             user_data,
151 			   GError             **error);
152 
153 static void parse_error   (GMarkupParseContext *context,
154                            GError              *error,
155 			   gpointer             user_data);
156 
157 static const GMarkupParser
158 mono_parser = {
159 	start_element,
160 	end_element,
161 	parse_text,
162 	passthrough,
163 	parse_error
164 };
165 
166 static GHashTable *config_handlers;
167 
168 static char *mono_cfg_dir = NULL;
169 
170 /* when this interface is stable, export it. */
171 typedef struct MonoParseHandler MonoParseHandler;
172 
173 struct MonoParseHandler {
174 	const char *element_name;
175 	void*(*init)   (MonoImage *assembly);
176 	void (*start)  (gpointer user_data, const gchar *name,
177 	                const gchar **attributes,
178 		        const gchar **values);
179 	void (*text)   (gpointer user_data, const char *text, gsize test_len);
180 	void (*end)    (gpointer user_data, const char *name);
181 	void (*finish) (gpointer user_data);
182 };
183 
184 typedef struct {
185 	MonoAssemblyBindingInfo *info;
186 	void (*info_parsed)(MonoAssemblyBindingInfo *info, void *user_data);
187 	void *user_data;
188 } ParserUserData;
189 
190 typedef struct {
191 	MonoParseHandler *current;
192 	void *user_data;
193 	MonoImage *assembly;
194 	int inited;
195 } ParseState;
196 
start_element(GMarkupParseContext * context,const gchar * element_name,const gchar ** attribute_names,const gchar ** attribute_values,gpointer user_data,GError ** error)197 static void start_element (GMarkupParseContext *context,
198                            const gchar         *element_name,
199 			   const gchar        **attribute_names,
200 			   const gchar        **attribute_values,
201 			   gpointer             user_data,
202 			   GError             **error)
203 {
204 	ParseState *state = (ParseState *)user_data;
205 	if (!state->current) {
206 		state->current = (MonoParseHandler *)g_hash_table_lookup (config_handlers, element_name);
207 		if (state->current && state->current->init)
208 			state->user_data = state->current->init (state->assembly);
209 	}
210 	if (state->current && state->current->start)
211 		state->current->start (state->user_data, element_name, attribute_names, attribute_values);
212 }
213 
end_element(GMarkupParseContext * context,const gchar * element_name,gpointer user_data,GError ** error)214 static void end_element   (GMarkupParseContext *context,
215                            const gchar         *element_name,
216 			   gpointer             user_data,
217 			   GError             **error)
218 {
219 	ParseState *state = (ParseState *)user_data;
220 	if (state->current) {
221 		if (state->current->end)
222 			state->current->end (state->user_data, element_name);
223 		if (strcmp (state->current->element_name, element_name) == 0) {
224 			if (state->current->finish)
225 				state->current->finish (state->user_data);
226 			state->current = NULL;
227 			state->user_data = NULL;
228 		}
229 	}
230 }
231 
parse_text(GMarkupParseContext * context,const gchar * text,gsize text_len,gpointer user_data,GError ** error)232 static void parse_text    (GMarkupParseContext *context,
233                            const gchar         *text,
234 			   gsize                text_len,
235 			   gpointer             user_data,
236 			   GError             **error)
237 {
238 	ParseState *state = (ParseState *)user_data;
239 	if (state->current && state->current->text)
240 		state->current->text (state->user_data, text, text_len);
241 }
242 
passthrough(GMarkupParseContext * context,const gchar * text,gsize text_len,gpointer user_data,GError ** error)243 static void passthrough   (GMarkupParseContext *context,
244                            const gchar         *text,
245 			   gsize                text_len,
246 			   gpointer             user_data,
247 			   GError             **error)
248 {
249 	/* do nothing */
250 }
251 
parse_error(GMarkupParseContext * context,GError * error,gpointer user_data)252 static void parse_error   (GMarkupParseContext *context,
253                            GError              *error,
254 			   gpointer             user_data)
255 {
256 	ParseState *state = (ParseState *)user_data;
257 	const gchar *msg;
258 	const gchar *filename;
259 
260 	filename = state && state->user_data ? (gchar *) state->user_data : "<unknown>";
261 	msg = error && error->message ? error->message : "";
262 	g_warning ("Error parsing %s: %s", filename, msg);
263 }
264 
265 static int
arch_matches(const char * arch,const char * value)266 arch_matches (const char* arch, const char *value)
267 {
268 	char **splitted, **p;
269 	int found = FALSE;
270 	if (value [0] == '!')
271 		return !arch_matches (arch, value + 1);
272 	p = splitted = g_strsplit (value, ",", 0);
273 	while (*p) {
274 		if (strcmp (arch, *p) == 0) {
275 			found = TRUE;
276 			break;
277 		}
278 		p++;
279 	}
280 	g_strfreev (splitted);
281 	return found;
282 }
283 
284 typedef struct {
285 	char *dll;
286 	char *target;
287 	int ignore;
288 	MonoImage *assembly;
289 } DllInfo;
290 
291 static void*
dllmap_init(MonoImage * assembly)292 dllmap_init (MonoImage *assembly) {
293 	DllInfo *info = g_new0 (DllInfo, 1);
294 	info->assembly = assembly;
295 	return info;
296 }
297 
298 static void
dllmap_start(gpointer user_data,const gchar * element_name,const gchar ** attribute_names,const gchar ** attribute_values)299 dllmap_start (gpointer user_data,
300               const gchar         *element_name,
301               const gchar        **attribute_names,
302               const gchar        **attribute_values)
303 {
304 	int i;
305 	DllInfo *info = (DllInfo *)user_data;
306 
307 	if (strcmp (element_name, "dllmap") == 0) {
308 		g_free (info->dll);
309 		g_free (info->target);
310 		info->dll = info->target = NULL;
311 		info->ignore = FALSE;
312 		for (i = 0; attribute_names [i]; ++i) {
313 			if (strcmp (attribute_names [i], "dll") == 0)
314 				info->dll = g_strdup (attribute_values [i]);
315 			else if (strcmp (attribute_names [i], "target") == 0){
316 				char *p = strstr (attribute_values [i], "$mono_libdir");
317 				if (p != NULL){
318 					char *libdir = mono_native_getrootdir ();
319 					size_t libdir_len = strlen (libdir);
320 					char *result;
321 
322 					result = (char *)g_malloc (libdir_len-strlen("$mono_libdir")+strlen(attribute_values[i])+1);
323 					strncpy (result, attribute_values[i], p-attribute_values[i]);
324 					strcpy (result+(p-attribute_values[i]), libdir);
325 					g_free (libdir);
326 					strcat (result, p+strlen("$mono_libdir"));
327 					info->target = result;
328 				} else
329 					info->target = g_strdup (attribute_values [i]);
330 			} else if (strcmp (attribute_names [i], "os") == 0 && !arch_matches (CONFIG_OS, attribute_values [i]))
331 				info->ignore = TRUE;
332 			else if (strcmp (attribute_names [i], "cpu") == 0 && !arch_matches (CONFIG_CPU, attribute_values [i]))
333 				info->ignore = TRUE;
334 			else if (strcmp (attribute_names [i], "wordsize") == 0 && !arch_matches (CONFIG_WORDSIZE, attribute_values [i]))
335 				info->ignore = TRUE;
336 		}
337 		if (!info->ignore)
338 			mono_dllmap_insert (info->assembly, info->dll, NULL, info->target, NULL);
339 	} else if (strcmp (element_name, "dllentry") == 0) {
340 		const char *name = NULL, *target = NULL, *dll = NULL;
341 		int ignore = FALSE;
342 		for (i = 0; attribute_names [i]; ++i) {
343 			if (strcmp (attribute_names [i], "dll") == 0)
344 				dll = attribute_values [i];
345 			else if (strcmp (attribute_names [i], "target") == 0)
346 				target = attribute_values [i];
347 			else if (strcmp (attribute_names [i], "name") == 0)
348 				name = attribute_values [i];
349 			else if (strcmp (attribute_names [i], "os") == 0 && !arch_matches (CONFIG_OS, attribute_values [i]))
350 				ignore = TRUE;
351 			else if (strcmp (attribute_names [i], "cpu") == 0 && !arch_matches (CONFIG_CPU, attribute_values [i]))
352 				ignore = TRUE;
353 			else if (strcmp (attribute_names [i], "wordsize") == 0 && !arch_matches (CONFIG_WORDSIZE, attribute_values [i]))
354 				ignore = TRUE;
355 		}
356 		if (!dll)
357 			dll = info->dll;
358 		if (!info->ignore && !ignore)
359 			mono_dllmap_insert (info->assembly, info->dll, name, dll, target);
360 	}
361 }
362 
363 static void
dllmap_finish(gpointer user_data)364 dllmap_finish (gpointer user_data)
365 {
366 	DllInfo *info = (DllInfo *)user_data;
367 
368 	g_free (info->dll);
369 	g_free (info->target);
370 	g_free (info);
371 }
372 
373 static const MonoParseHandler
374 dllmap_handler = {
375 	"dllmap",
376 	dllmap_init,
377 	dllmap_start,
378 	NULL, /* text */
379 	NULL, /* end */
380 	dllmap_finish
381 };
382 
383 static void
legacyUEP_start(gpointer user_data,const gchar * element_name,const gchar ** attribute_names,const gchar ** attribute_values)384 legacyUEP_start (gpointer user_data,
385               const gchar         *element_name,
386               const gchar        **attribute_names,
387               const gchar        **attribute_values) {
388 	if ((strcmp (element_name, "legacyUnhandledExceptionPolicy") == 0) &&
389 			(attribute_names [0] != NULL) &&
390 			(strcmp (attribute_names [0], "enabled") == 0)) {
391 		if ((strcmp (attribute_values [0], "1") == 0) ||
392 				(g_ascii_strcasecmp (attribute_values [0], "true") == 0)) {
393 			mono_runtime_unhandled_exception_policy_set (MONO_UNHANDLED_POLICY_LEGACY);
394 		}
395 	}
396 }
397 
398 static const MonoParseHandler
399 legacyUEP_handler = {
400 	"legacyUnhandledExceptionPolicy",
401 	NULL, /* init */
402 	legacyUEP_start,
403 	NULL, /* text */
404 	NULL, /* end */
405 	NULL, /* finish */
406 };
407 
408 static void
aot_cache_start(gpointer user_data,const gchar * element_name,const gchar ** attribute_names,const gchar ** attribute_values)409 aot_cache_start (gpointer user_data,
410 				 const gchar         *element_name,
411 				 const gchar        **attribute_names,
412 				 const gchar        **attribute_values)
413 {
414 	int i;
415 	MonoAotCacheConfig *config;
416 
417 	if (strcmp (element_name, "aotcache") != 0)
418 		return;
419 
420 	config = mono_get_aot_cache_config ();
421 
422 	/* Per-app configuration */
423 	for (i = 0; attribute_names [i]; ++i) {
424 		if (!strcmp (attribute_names [i], "app")) {
425 			config->apps = g_slist_prepend (config->apps, g_strdup (attribute_values [i]));
426 		}
427 	}
428 
429 	/* Global configuration */
430 	for (i = 0; attribute_names [i]; ++i) {
431 		if (!strcmp (attribute_names [i], "assemblies")) {
432 			char **parts, **ptr;
433 			char *part;
434 
435 			parts = g_strsplit (attribute_values [i], " ", -1);
436 			for (ptr = parts; ptr && *ptr; ptr ++) {
437 				part = *ptr;
438 				config->assemblies = g_slist_prepend (config->assemblies, g_strdup (part));
439 			}
440 			g_strfreev (parts);
441 		} else if (!strcmp (attribute_names [i], "options")) {
442 			config->aot_options = g_strdup (attribute_values [i]);
443 		}
444 	}
445 }
446 
447 static const MonoParseHandler
448 aot_cache_handler = {
449 	"aotcache",
450 	NULL, /* init */
451 	aot_cache_start,
452 	NULL, /* text */
453 	NULL, /* end */
454 	NULL, /* finish */
455 };
456 
457 static int inited = 0;
458 
459 static void
mono_config_init(void)460 mono_config_init (void)
461 {
462 	inited = 1;
463 	config_handlers = g_hash_table_new (g_str_hash, g_str_equal);
464 	g_hash_table_insert (config_handlers, (gpointer) dllmap_handler.element_name, (gpointer) &dllmap_handler);
465 	g_hash_table_insert (config_handlers, (gpointer) legacyUEP_handler.element_name, (gpointer) &legacyUEP_handler);
466 	g_hash_table_insert (config_handlers, (gpointer) aot_cache_handler.element_name, (gpointer) &aot_cache_handler);
467 }
468 
469 /**
470  * mono_config_cleanup:
471  */
472 void
mono_config_cleanup(void)473 mono_config_cleanup (void)
474 {
475 	if (config_handlers)
476 		g_hash_table_destroy (config_handlers);
477 	g_free (mono_cfg_dir);
478 }
479 
480 /* FIXME: error handling */
481 
482 static void
mono_config_parse_xml_with_context(ParseState * state,const char * text,gsize len)483 mono_config_parse_xml_with_context (ParseState *state, const char *text, gsize len)
484 {
485 	GMarkupParseContext *context;
486 
487 	if (!inited)
488 		mono_config_init ();
489 
490 	context = g_markup_parse_context_new (&mono_parser, (GMarkupParseFlags)0, state, NULL);
491 	if (g_markup_parse_context_parse (context, text, len, NULL)) {
492 		g_markup_parse_context_end_parse (context, NULL);
493 	}
494 	g_markup_parse_context_free (context);
495 }
496 
497 /* If assembly is NULL, parse in the global context */
498 static int
mono_config_parse_file_with_context(ParseState * state,const char * filename)499 mono_config_parse_file_with_context (ParseState *state, const char *filename)
500 {
501 	gchar *text;
502 	gsize len;
503 	gint offset;
504 
505 	mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_CONFIG,
506 			"Config attempting to parse: '%s'.", filename);
507 
508 	if (!g_file_get_contents (filename, &text, &len, NULL))
509 		return 0;
510 
511 	offset = 0;
512 	if (len > 3 && text [0] == '\xef' && text [1] == (gchar) '\xbb' && text [2] == '\xbf')
513 		offset = 3; /* Skip UTF-8 BOM */
514 	if (state->user_data == NULL)
515 		state->user_data = (gpointer) filename;
516 	mono_config_parse_xml_with_context (state, text + offset, len - offset);
517 	g_free (text);
518 	return 1;
519 }
520 
521 /**
522  * mono_config_parse_memory:
523  * \param buffer a pointer to an string XML representation of the configuration
524  * Parses the configuration from a buffer
525  */
526 void
mono_config_parse_memory(const char * buffer)527 mono_config_parse_memory (const char *buffer)
528 {
529 	ParseState state = {NULL};
530 
531 	state.user_data = (gpointer) "<buffer>";
532 	mono_config_parse_xml_with_context (&state, buffer, strlen (buffer));
533 }
534 
535 static void
mono_config_parse_file(const char * filename)536 mono_config_parse_file (const char *filename)
537 {
538 	ParseState state = {NULL};
539 	state.user_data = (gpointer) filename;
540 	mono_config_parse_file_with_context (&state, filename);
541 }
542 
543 /*
544  * use the equivalent lookup code from the GAC when available.
545  * Depending on state, this should give something like:
546  * 	aname/version-pubtoken/
547  * 	aname/version/
548  * 	aname
549  */
550 static char*
get_assembly_filename(MonoImage * image,int state)551 get_assembly_filename (MonoImage *image, int state)
552 {
553 	switch (state) {
554 	case 0:
555 		return g_strdup (mono_image_get_name (image));
556 	default:
557 		return NULL;
558 	}
559 }
560 
561 typedef struct _BundledConfig BundledConfig;
562 
563 struct _BundledConfig {
564 	BundledConfig *next;
565 	const char* aname;
566 	const char* config_xml;
567 };
568 
569 static BundledConfig *bundled_configs = NULL;
570 
571 static const char *bundled_machine_config = NULL;
572 
573 /**
574  * mono_register_config_for_assembly:
575  */
576 void
mono_register_config_for_assembly(const char * assembly_name,const char * config_xml)577 mono_register_config_for_assembly (const char* assembly_name, const char* config_xml)
578 {
579 	BundledConfig *bconfig;
580 
581 	bconfig = g_new0 (BundledConfig, 1);
582 	bconfig->aname = assembly_name;
583 	bconfig->config_xml = config_xml;
584 	bconfig->next = bundled_configs;
585 	bundled_configs = bconfig;
586 }
587 
588 /**
589  * mono_config_string_for_assembly_file:
590  */
591 const char *
mono_config_string_for_assembly_file(const char * filename)592 mono_config_string_for_assembly_file (const char *filename)
593 {
594 	BundledConfig *bconfig;
595 
596 	for (bconfig = bundled_configs; bconfig; bconfig = bconfig->next) {
597 		if (bconfig->aname && strcmp (bconfig->aname, filename) == 0)
598 			return bconfig->config_xml;
599 	}
600 	return NULL;
601 }
602 
603 /**
604  * mono_config_for_assembly:
605  */
606 void
mono_config_for_assembly(MonoImage * assembly)607 mono_config_for_assembly (MonoImage *assembly)
608 {
609 	ParseState state = {NULL};
610 	int got_it = 0, i;
611 	char *aname, *cfg, *cfg_name;
612 	const char *bundled_config;
613 
614 	state.assembly = assembly;
615 
616 	bundled_config = mono_config_string_for_assembly_file (assembly->module_name);
617 	if (bundled_config) {
618 		state.user_data = (gpointer) "<bundled>";
619 		mono_config_parse_xml_with_context (&state, bundled_config, strlen (bundled_config));
620 	}
621 
622 	cfg_name = g_strdup_printf ("%s.config", mono_image_get_filename (assembly));
623 	mono_config_parse_file_with_context (&state, cfg_name);
624 	g_free (cfg_name);
625 
626 	cfg_name = g_strdup_printf ("%s.config", mono_image_get_name (assembly));
627 
628 	for (i = 0; (aname = get_assembly_filename (assembly, i)) != NULL; ++i) {
629 		cfg = g_build_filename (mono_get_config_dir (), "mono", "assemblies", aname, cfg_name, NULL);
630 		got_it += mono_config_parse_file_with_context (&state, cfg);
631 		g_free (cfg);
632 
633 #ifdef TARGET_WIN32
634 		const char *home = g_get_home_dir ();
635 		cfg = g_build_filename (home, ".mono", "assemblies", aname, cfg_name, NULL);
636 		got_it += mono_config_parse_file_with_context (&state, cfg);
637 		g_free (cfg);
638 #endif
639 		g_free (aname);
640 		if (got_it)
641 			break;
642 	}
643 	g_free (cfg_name);
644 }
645 
646 /**
647  * mono_config_parse:
648  * \param filename the filename to load the configuration variables from.
649  * Pass a NULL filename to parse the default config files
650  * (or the file in the \c MONO_CONFIG env var).
651  */
652 void
mono_config_parse(const char * filename)653 mono_config_parse (const char *filename) {
654 	const char *home;
655 	char *mono_cfg;
656 #ifndef TARGET_WIN32
657 	char *user_cfg;
658 #endif
659 
660 	if (filename) {
661 		mono_config_parse_file (filename);
662 		return;
663 	}
664 
665 	// FIXME: leak, do we store any references to home
666 	char *env_home = g_getenv ("MONO_CONFIG");
667 	if (env_home) {
668 		mono_config_parse_file (env_home);
669 		return;
670 	}
671 
672 	mono_cfg = g_build_filename (mono_get_config_dir (), "mono", "config", NULL);
673 	mono_config_parse_file (mono_cfg);
674 	g_free (mono_cfg);
675 
676 #if !defined(TARGET_WIN32)
677 	home = g_get_home_dir ();
678 	user_cfg = g_strconcat (home, G_DIR_SEPARATOR_S, ".mono/config", NULL);
679 	mono_config_parse_file (user_cfg);
680 	g_free (user_cfg);
681 #endif
682 }
683 
684 /**
685  * mono_set_config_dir:
686  * Invoked during startup
687  */
688 void
mono_set_config_dir(const char * dir)689 mono_set_config_dir (const char *dir)
690 {
691 	/* If this environment variable is set, overrides the directory computed */
692 	char *env_mono_cfg_dir = g_getenv ("MONO_CFG_DIR");
693 	if (env_mono_cfg_dir == NULL && dir != NULL)
694 		env_mono_cfg_dir = g_strdup (dir);
695 
696 	mono_cfg_dir = env_mono_cfg_dir;
697 }
698 
699 /**
700  * mono_get_config_dir:
701  */
702 const char*
mono_get_config_dir(void)703 mono_get_config_dir (void)
704 {
705 	if (mono_cfg_dir == NULL)
706 		mono_set_dirs (NULL, NULL);
707 
708 	return mono_cfg_dir;
709 }
710 
711 /**
712  * mono_register_machine_config:
713  */
714 void
mono_register_machine_config(const char * config_xml)715 mono_register_machine_config (const char *config_xml)
716 {
717 	bundled_machine_config = config_xml;
718 }
719 
720 /**
721  * mono_get_machine_config:
722  */
723 const char *
mono_get_machine_config(void)724 mono_get_machine_config (void)
725 {
726 	return bundled_machine_config;
727 }
728 
729 static void
assembly_binding_end(gpointer user_data,const char * element_name)730 assembly_binding_end (gpointer user_data, const char *element_name)
731 {
732 	ParserUserData *pud = (ParserUserData *)user_data;
733 
734 	if (!strcmp (element_name, "dependentAssembly")) {
735 		if (pud->info_parsed && pud->info) {
736 			pud->info_parsed (pud->info, pud->user_data);
737 			g_free (pud->info->name);
738 			g_free (pud->info->culture);
739 		}
740 	}
741 }
742 
743 static void
publisher_policy_start(gpointer user_data,const gchar * element_name,const gchar ** attribute_names,const gchar ** attribute_values)744 publisher_policy_start (gpointer user_data,
745 		const gchar *element_name,
746 		const gchar **attribute_names,
747 		const gchar **attribute_values)
748 {
749 	ParserUserData *pud;
750 	MonoAssemblyBindingInfo *info;
751 	int n;
752 
753 	pud = (ParserUserData *)user_data;
754 	info = pud->info;
755 	if (!strcmp (element_name, "dependentAssembly")) {
756 		info->name = NULL;
757 		info->culture = NULL;
758 		info->has_old_version_bottom = FALSE;
759 		info->has_old_version_top = FALSE;
760 		info->has_new_version = FALSE;
761 		info->is_valid = FALSE;
762 		memset (&info->old_version_bottom, 0, sizeof (info->old_version_bottom));
763 		memset (&info->old_version_top, 0, sizeof (info->old_version_top));
764 		memset (&info->new_version, 0, sizeof (info->new_version));
765 	} else if (!strcmp (element_name, "assemblyIdentity")) {
766 		for (n = 0; attribute_names [n]; n++) {
767 			const gchar *attribute_name = attribute_names [n];
768 
769 			if (!strcmp (attribute_name, "name"))
770 				info->name = g_strdup (attribute_values [n]);
771 			else if (!strcmp (attribute_name, "publicKeyToken")) {
772 				if (strlen (attribute_values [n]) == MONO_PUBLIC_KEY_TOKEN_LENGTH - 1)
773 					g_strlcpy ((char *) info->public_key_token, attribute_values [n], MONO_PUBLIC_KEY_TOKEN_LENGTH);
774 			} else if (!strcmp (attribute_name, "culture")) {
775 				if (!strcmp (attribute_values [n], "neutral"))
776 					info->culture = g_strdup ("");
777 				else
778 					info->culture = g_strdup (attribute_values [n]);
779 			}
780 		}
781 	} else if (!strcmp (element_name, "bindingRedirect")) {
782 		for (n = 0; attribute_names [n]; n++) {
783 			const gchar *attribute_name = attribute_names [n];
784 
785 			if (!strcmp (attribute_name, "oldVersion")) {
786 				gchar **numbers, **version, **versions;
787 				gint major, minor, build, revision;
788 
789 				/* Invalid value */
790 				if (!strcmp (attribute_values [n], ""))
791 					return;
792 
793 				versions = g_strsplit (attribute_values [n], "-", 2);
794 				version = g_strsplit (*versions, ".", 4);
795 
796 				/* We assign the values to gint vars to do the checks */
797 				numbers = version;
798 				major = *numbers ? atoi (*numbers++) : -1;
799 				minor = *numbers ? atoi (*numbers++) : -1;
800 				build = *numbers ? atoi (*numbers++) : -1;
801 				revision = *numbers ? atoi (*numbers) : -1;
802 				g_strfreev (version);
803 				if (major < 0 || minor < 0 || build < 0 || revision < 0) {
804 					g_strfreev (versions);
805 					return;
806 				}
807 
808 				info->old_version_bottom.major = major;
809 				info->old_version_bottom.minor = minor;
810 				info->old_version_bottom.build = build;
811 				info->old_version_bottom.revision = revision;
812 				info->has_old_version_bottom = TRUE;
813 
814 				if (!*(versions + 1)) {
815 					g_strfreev (versions);
816 					continue;
817 				}
818 
819 				numbers = version = g_strsplit (*(versions + 1), ".", 4);
820 				major = *numbers ? atoi (*numbers++) : -1;
821 				minor = *numbers ? atoi (*numbers++) : -1;
822 				build = *numbers ? atoi (*numbers++) : -1;
823 				revision = *numbers ? atoi (*numbers) : 1;
824 				g_strfreev (version);
825 				if (major < 0 || minor < 0 || build < 0 || revision < 0) {
826 					g_strfreev (versions);
827 					return;
828 				}
829 
830 				info->old_version_top.major = major;
831 				info->old_version_top.minor = minor;
832 				info->old_version_top.build = build;
833 				info->old_version_top.revision = revision;
834 				info->has_old_version_top = TRUE;
835 
836 				g_strfreev (versions);
837 			} else if (!strcmp (attribute_name, "newVersion")) {
838 				gchar **numbers, **version;
839 
840 				/* Invalid value */
841 				if (!strcmp (attribute_values [n], ""))
842 					return;
843 
844 				numbers = version = g_strsplit (attribute_values [n], ".", 4);
845 				info->new_version.major = *numbers ? atoi (*numbers++) : -1;
846 				info->new_version.minor = *numbers ? atoi (*numbers++) : -1;
847 				info->new_version.build = *numbers ? atoi (*numbers++) : -1;
848 				info->new_version.revision = *numbers ? atoi (*numbers) : -1;
849 				info->has_new_version = TRUE;
850 				g_strfreev (version);
851 			}
852 		}
853 	}
854 }
855 
856 static MonoParseHandler
857 publisher_policy_parser = {
858 	"", /* We don't need to use declare an xml element */
859 	NULL,
860 	publisher_policy_start,
861 	NULL,
862 	NULL,
863 	NULL
864 };
865 
866 void
mono_config_parse_publisher_policy(const gchar * filename,MonoAssemblyBindingInfo * info)867 mono_config_parse_publisher_policy (const gchar *filename, MonoAssemblyBindingInfo *info)
868 {
869 	ParserUserData user_data = {
870 		info,
871 		NULL,
872 		NULL
873 	};
874 	ParseState state = {
875 		&publisher_policy_parser, /* MonoParseHandler */
876 		&user_data, /* user_data */
877 		NULL, /* MonoImage (we don't need it right now)*/
878 		TRUE /* We are already inited */
879 	};
880 
881 	mono_config_parse_file_with_context (&state, filename);
882 }
883 
884 static MonoParseHandler
885 config_assemblybinding_parser = {
886 	"", /* We don't need to use declare an xml element */
887 	NULL,
888 	publisher_policy_start,
889 	NULL,
890 	assembly_binding_end,
891 	NULL
892 };
893 
894 void
mono_config_parse_assembly_bindings(const char * filename,int amajor,int aminor,void * user_data,void (* infocb)(MonoAssemblyBindingInfo * info,void * user_data))895 mono_config_parse_assembly_bindings (const char *filename, int amajor, int aminor, void *user_data, void (*infocb)(MonoAssemblyBindingInfo *info, void *user_data))
896 {
897 	MonoAssemblyBindingInfo info;
898 	ParserUserData pud;
899 	ParseState state;
900 
901 	info.major = amajor;
902 	info.minor = aminor;
903 
904 	pud.info = &info;
905 	pud.info_parsed = infocb;
906 	pud.user_data = user_data;
907 
908 	state.current = &config_assemblybinding_parser;  /* MonoParseHandler */
909 	state.user_data = &pud;
910 	state.assembly = NULL; /* MonoImage (we don't need it right now)*/
911 	state.inited = TRUE; /* We are already inited */
912 
913 	mono_config_parse_file_with_context (&state, filename);
914 }
915 
916 static mono_bool mono_server_mode = FALSE;
917 
918 /**
919  * mono_config_set_server_mode:
920  */
921 void
mono_config_set_server_mode(mono_bool server_mode)922 mono_config_set_server_mode (mono_bool server_mode)
923 {
924 	mono_server_mode = server_mode;
925 }
926 
927 /**
928  * mono_config_is_server_mode:
929  */
930 mono_bool
mono_config_is_server_mode(void)931 mono_config_is_server_mode (void)
932 {
933 	return mono_server_mode;
934 }
935 
936