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1/*
2 * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights
7 * Reserved. This file contains Original Code and/or Modifications of
8 * Original Code as defined in and that are subject to the Apple Public
9 * Source License Version 2.0 (the "License"). You may not use this file
10 * except in compliance with the License. Please obtain a copy of the
11 * License at http://www.apple.com/publicsource and read it before using
12 * this file.
13 *
14 * The Original Code and all software distributed under the License are
15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
19 * License for the specific language governing rights and limitations
20 * under the License.
21 *
22 * @APPLE_LICENSE_HEADER_END@
23 */
24/*
25 * Copyright 1993 NeXT, Inc.
26 * All rights reserved.
27 */
28
29#include "bootstruct.h"
30#include "libsaio.h"
31#include "boot.h"
32#include "xml.h"
33
34extern char *Language;
35extern char *LoadableFamilies;
36
37bool sysConfigValid;
38
39/*
40 * Compare a string to a key with quoted characters
41 */
42static inline int
43keyncmp(const char *str, const char *key, int n)
44{
45 int c;
46 while (n--) {
47c = *key++;
48if (c == '\\') {
49 switch(c = *key++) {
50 case 'n':
51c = '\n';
52break;
53 case 'r':
54c = '\r';
55break;
56 case 't':
57c = '\t';
58break;
59 default:
60break;
61 }
62} else if (c == '\"') {
63 /* Premature end of key */
64 return 1;
65}
66if (c != *str++) {
67 return 1;
68}
69 }
70 return 0;
71}
72
73#if UNUSED
74
75static void eatThru(char val, const char **table_p)
76{
77register const char *table = *table_p;
78register bool found = false;
79
80while (*table && !found)
81{
82if (*table == '\\') table += 2;
83else
84{
85if (*table == val) found = true;
86table++;
87}
88}
89*table_p = table;
90}
91
92/* Remove key and its associated value from the table. */
93
94bool
95removeKeyFromTable(const char *key, char *table)
96{
97 register int len;
98 register char *tab;
99 char *buf;
100
101 len = strlen(key);
102 tab = (char *)table;
103 buf = (char *)malloc(len + 3);
104
105 sprintf(buf, "\"%s\"", key);
106 len = strlen(buf);
107
108 while(*tab) {
109 if(strncmp(buf, tab, len) == 0) {
110 char c;
111
112 while((c = *(tab + len)) != ';') {
113 if(c == 0) {
114 len = -1;
115 goto out;
116 }
117 len++;
118 }
119 len++;
120 if(*(tab + len) == '\n') len++;
121 goto out;
122 }
123 tab++;
124 }
125 len = -1;
126out:
127 free(buf);
128
129 if(len == -1) return false;
130
131 while((*tab = *(tab + len))) {
132 tab++;
133 }
134
135 return true;
136}
137
138char *
139newStringFromList(
140 char **list,
141 int *size
142)
143{
144 char *begin = *list, *end;
145 char *newstr;
146 int newsize = *size;
147 int bufsize;
148
149 while (*begin && newsize && isspace(*begin)) {
150begin++;
151newsize--;
152 }
153 end = begin;
154 while (*end && newsize && !isspace(*end)) {
155end++;
156newsize--;
157 }
158 if (begin == end)
159return 0;
160 bufsize = end - begin + 1;
161 newstr = malloc(bufsize);
162 strlcpy(newstr, begin, bufsize);
163 *list = end;
164 *size = newsize;
165 return newstr;
166}
167
168#endif
169
170/*
171 * compress == compress escaped characters to one character
172 */
173int stringLength(const char *table, int compress)
174{
175int ret = 0;
176
177while (*table)
178{
179if (*table == '\\')
180{
181table += 2;
182ret += 1 + (compress ? 0 : 1);
183}
184else
185{
186if (*table == '\"') return ret;
187ret++;
188table++;
189}
190}
191return ret;
192}
193
194
195bool getValueForConfigTableKey(config_file_t *config, const char *key, const char **val, int *size)
196{
197if (config->dictionary != 0 ) {
198// Look up key in XML dictionary
199TagPtr value;
200value = XMLGetProperty(config->dictionary, key);
201if (value != 0) {
202if (value->type != kTagTypeString) {
203error("Non-string tag '%s' found in config file\n",
204 key);
205return false;
206}
207*val = value->string;
208*size = strlen(value->string);
209return true;
210}
211} else {
212
213// Legacy plist-style table
214
215}
216
217return false;
218}
219
220#if UNUSED
221
222/*
223 * Returns a new malloc'ed string if one is found
224 * in the string table matching 'key'. Also translates
225 * \n escapes in the string.
226 */
227char *newStringForStringTableKey(
228char *table,
229char *key,
230config_file_t *config
231)
232{
233 const char *val;
234 char *newstr, *p;
235 int size;
236
237 if (getValueForConfigTableKey(config, key, &val, &size)) {
238newstr = (char *)malloc(size+1);
239for (p = newstr; size; size--, p++, val++) {
240 if ((*p = *val) == '\\') {
241switch (*++val) {
242case 'r':
243 *p = '\r';
244 break;
245case 'n':
246 *p = '\n';
247 break;
248case 't':
249 *p = '\t';
250 break;
251default:
252 *p = *val;
253 break;
254}
255size--;
256 }
257}
258*p = '\0';
259return newstr;
260 } else {
261return 0;
262 }
263}
264
265#endif
266
267char *
268newStringForKey(char *key, config_file_t *config)
269{
270 const char *val;
271 char *newstr;
272 int size;
273
274 if (getValueForKey(key, &val, &size, config) && size) {
275newstr = (char *)malloc(size + 1);
276strlcpy(newstr, val, size + 1);
277return newstr;
278 } else {
279return 0;
280 }
281}
282
283/* parse a command line
284 * in the form: [<argument> ...] [<option>=<value> ...]
285 * both <option> and <value> must be either composed of
286 * non-whitespace characters, or enclosed in quotes.
287 */
288
289static const char *getToken(const char *line, const char **begin, int *len)
290{
291 if (*line == '\"') {
292*begin = ++line;
293while (*line && *line != '\"')
294 line++;
295*len = line++ - *begin;
296 } else {
297*begin = line;
298while (*line && !isspace(*line) && *line != '=')
299 line++;
300*len = line - *begin;
301 }
302 return line;
303}
304
305bool getValueForBootKey(const char *line, const char *match, const char **matchval, int *len)
306{
307 const char *key, *value;
308 int key_len, value_len;
309 bool retval = false;
310
311 while (*line) {
312/* look for keyword or argument */
313while (isspace(*line)) line++;
314
315/* now look for '=' or whitespace */
316line = getToken(line, &key, &key_len);
317/* line now points to '=' or space */
318if (*line && !isspace(*line)) {
319 line = getToken(++line, &value, &value_len);
320} else {
321 value = line;
322 value_len = 0;
323}
324if ((strlen(match) == key_len)
325 && strncmp(match, key, key_len) == 0) {
326// create a new string
327char* newstr = malloc(value_len + 1);
328strncpy(newstr, value, value_len);
329newstr[value_len] = 0;
330
331 *matchval = newstr;
332 *len = value_len;
333 retval = true;
334 /* Continue to look for this key; last one wins. */
335}
336 }
337
338
339 return retval;
340}
341
342/* Return NULL if no option has been successfully retrieved, or the string otherwise */
343const char * getStringForKey(const char * key, config_file_t *config)
344{
345 static const char* value =0;
346 int len=0;
347 if(!getValueForKey(key, &value, &len, config)) value = 0;
348 return value;
349}
350
351
352/* Returns TRUE if a value was found, FALSE otherwise.
353 * The boolean value of the key is stored in 'val'.
354 */
355
356bool getBoolForKey( const char *key, bool *result_val, config_file_t *config )
357{
358 const char *key_val;
359 int size;
360
361 if (getValueForKey(key, &key_val, &size, config)) {
362 if ( (size >= 1) && (key_val[0] == 'Y' || key_val[0] == 'y') ) {
363 *result_val = true;
364 } else {
365 *result_val = false;
366 }
367 return true;
368 }
369 return false;
370}
371
372bool getIntForKey( const char *key, int *value, config_file_t *config )
373{
374 const char *val;
375 int size, sum;
376 bool negative = false;
377
378 if (getValueForKey(key, &val, &size, config))
379{
380if ( size )
381{
382if (*val == '-')
383{
384negative = true;
385val++;
386size--;
387}
388
389for (sum = 0; size > 0; size--)
390{
391if (*val < '0' || *val > '9')
392return false;
393
394sum = (sum * 10) + (*val++ - '0');
395}
396
397if (negative)
398sum = -sum;
399
400*value = sum;
401return true;
402}
403}
404 return false;
405}
406
407/*
408 *
409 */
410
411bool getDimensionForKey( const char *key, unsigned int *value, config_file_t *config, unsigned int dimension_max, unsigned int object_size )
412{
413const char *val;
414
415 int size = 0;
416int sum = 0;
417
418bool negative = false;
419bool percentage = false;
420
421 if (getValueForKey(key, &val, &size, config))
422{
423if ( size )
424{
425if (*val == '-')
426{
427negative = true;
428val++;
429size--;
430}
431
432if (val[size-1] == '%')
433{
434percentage = true;
435size--;
436}
437
438// convert string to integer
439for (sum = 0; size > 0; size--)
440{
441if (*val < '0' || *val > '9')
442return false;
443
444sum = (sum * 10) + (*val++ - '0');
445}
446
447if (percentage)
448sum = ( dimension_max * sum ) / 100;
449
450// calculate offset from opposite origin
451if (negative)
452sum = ( ( dimension_max - object_size ) - sum );
453
454} else {
455
456// null value calculate center
457sum = ( dimension_max - object_size ) / 2;
458
459}
460
461*value = (uint16_t) sum;
462return true;
463}
464
465// key not found
466 return false;
467}
468
469/*
470 *get color value from plist format #RRGGBB
471 */
472
473bool getColorForKey( const char *key, unsigned int *value, config_file_t *config )
474{
475 const char *val;
476 int size;
477
478 if (getValueForKey(key, &val, &size, config))
479{
480if (*val == '#')
481{
482 val++;
483*value = strtol(val, NULL, 16);
484return true;
485 }
486 }
487 return false;
488}
489
490bool getValueForKey( const char *key, const char **val, int *size, config_file_t *config )
491{
492 const char *overrideVal;
493 int overrideSize;
494 bool override, ret;
495
496 if (getValueForBootKey(bootArgs->CommandLine, key, val, size))
497 return true;
498
499 ret = getValueForConfigTableKey(config, key, val, size);
500
501 // Try to find alternate keys in bootInfo->overrideConfig
502 // and prefer its values with the exceptions for
503 // "Kernel"="mach_kernel" and "Kernel Flags"="".
504
505 if (config->canOverride)
506 {
507 if (getValueForConfigTableKey(&bootInfo->chameleonConfig, key, &overrideVal, &overrideSize))
508 {
509 override = true;
510
511 // NOTE: Values are defined by apple as being in com.apple.Boot.plist
512 // kHelperRootUUIDKey, kKernelArchKey, kMKextCacheKey, kKernelCacheKey, kKernelNameKey, kKernelFlagsKey
513 if (ret && (strcmp(key, kKernelNameKey) == 0) && (overrideSize == 0))
514 override = false;
515
516 if (ret && (strcmp(key, kKernelFlagsKey) == 0) && (overrideSize == 0))
517 override = false;
518
519 if (override)
520 {
521 *val = overrideVal;
522 *size = overrideSize;
523 return true;
524 }
525 }
526 }
527
528 return ret;
529}
530
531
532#if UNUSED
533void
534printSystemConfig(char *p1)
535{
536 char *p2 = p1, tmp;
537
538 while (*p1 != '\0') {
539while (*p2 != '\0' && *p2 != '\n') p2++;
540tmp = *p2;
541*p2 = '\0';
542printf("%s\n", p1);
543*p2 = tmp;
544if (tmp == '\0') break;
545p1 = ++p2;
546 }
547}
548#endif
549
550//==========================================================================
551// ParseXMLFile
552// Modifies the input buffer.
553// Expects to see one dictionary in the XML file.
554// Puts the first dictionary it finds in the
555// tag pointer and returns 0, or returns -1 if not found
556// (and does not modify dict pointer).
557// Prints an error message if there is a parsing error.
558//
559int ParseXMLFile( char * buffer, TagPtr * dict )
560{
561 long length, pos;
562 TagPtr tag;
563 pos = 0;
564 char *configBuffer;
565
566 configBuffer = malloc(strlen(buffer)+1);
567 strcpy(configBuffer, buffer);
568
569 while (1)
570 {
571 length = XMLParseNextTag(configBuffer + pos, &tag);
572 if (length == -1) break;
573
574 pos += length;
575
576 if (tag == 0) continue;
577 if (tag->type == kTagTypeDict) break;
578
579 XMLFreeTag(tag);
580 }
581 free(configBuffer);
582 if (length < 0) {
583 error ("Error parsing plist file\n");
584 return -1;
585 }
586 *dict = tag;
587 return 0;
588}
589
590/* loadConfigFile
591 *
592 * Returns 0 - successful.
593 * -1 - unsuccesful.
594 */
595int loadConfigFile (const char *configFile, config_file_t *config)
596{
597int fd, count;
598
599if ((fd = open_bvdev("bt(0,0)", configFile, 0)) < 0) {
600return -1;
601}
602// read file
603count = read(fd, config->plist, IO_CONFIG_DATA_SIZE);
604close(fd);
605
606// build xml dictionary
607ParseXMLFile(config->plist, &config->dictionary);
608return 0;
609}
610
611
612/* loadSystemConfig
613 *
614 * Returns 0 - successful.
615 * -1 - unsuccesful.
616 */
617int loadSystemConfig(config_file_t *config)
618{
619char *dirspec[] = {
620"/Library/Preferences/SystemConfiguration/com.apple.Boot.plist",
621};
622
623int i, fd, count, ret=-1;
624
625for(i = 0; i< sizeof(dirspec)/sizeof(dirspec[0]); i++)
626{
627if ((fd = open(dirspec[i], 0)) >= 0)
628{
629// read file
630count = read(fd, config->plist, IO_CONFIG_DATA_SIZE);
631close(fd);
632
633// build xml dictionary
634ParseXMLFile(config->plist, &config->dictionary);
635sysConfigValid = true;
636ret=0;
637
638// enable canOverride flag
639config->canOverride = true;
640
641break;
642}
643}
644if(ret == -1) ret = loadHelperConfig(config);
645return ret;
646}
647
648/* loadChameleonConfig
649 *
650 * Returns 0 - successful.
651 * -1 - unsuccesful.
652 */
653int loadChameleonConfig(config_file_t *config)
654{
655char *dirspec[] = {
656"rd(0,0)/Extra/org.chameleon.Boot.plist",
657"/Extra/org.chameleon.Boot.plist",
658"bt(0,0)/Extra/org.chameleon.Boot.plist",
659
660"rd(0,0)/Extra/com.apple.Boot.plist", /* DEPRECIATED */
661"/Extra/com.apple.Boot.plist", /* DEPRECIATED */
662"bt(0,0)/Extra/com.apple.Boot.plist", /* DEPRECIATED */
663};
664
665int i, fd, count, ret=-1;
666
667for(i = 0; i< sizeof(dirspec)/sizeof(dirspec[0]); i++)
668{
669if ((fd = open(dirspec[i], 0)) >= 0)
670{
671 // Check for depreciated file names and annoy the user about it.
672 if(strstr(dirspec[i], "com.apple.Boot.plist"))
673 {
674 printf("%s is depreciated.\n", dirspec[i]);
675 dirspec[i][strlen(dirspec[i]) - strlen("com.apple.Boot.plist")] = 0;
676 printf("Please use the file %sorg.chameleon.Boot.plist instead.\n", dirspec[i]);
677 pause();
678 }
679// read file
680count = read(fd, config->plist, IO_CONFIG_DATA_SIZE);
681close(fd);
682
683// build xml dictionary
684ParseXMLFile(config->plist, &config->dictionary);
685sysConfigValid = true;
686ret=0;
687break;
688}
689}
690return ret;
691}
692
693/* loadHelperConfig
694 *
695 * Returns 0 - successful.
696 * -1 - unsuccesful.
697 */
698int loadHelperConfig(config_file_t *config)
699{
700char *dirspec[] = {
701"/com.apple.boot.P/Library/Preferences/SystemConfiguration/com.apple.Boot.plist",
702"/com.apple.boot.R/Library/Preferences/SystemConfiguration/com.apple.Boot.plist",
703"/com.apple.boot.S/Library/Preferences/SystemConfiguration/com.apple.Boot.plist"
704};
705
706int i, fd, count, ret=-1;
707
708for(i = 0; i< sizeof(dirspec)/sizeof(dirspec[0]); i++)
709{
710if ((fd = open(dirspec[i], 0)) >= 0)
711{
712// read file
713count = read(fd, config->plist, IO_CONFIG_DATA_SIZE);
714close(fd);
715
716// build xml dictionary
717ParseXMLFile(config->plist, &config->dictionary);
718sysConfigValid = true;
719ret=0;
720break;
721}
722}
723return ret;
724}
725
726char * newString(const char * oldString)
727{
728 if ( oldString )
729 return strcpy(malloc(strlen(oldString)+1), oldString);
730 else
731 return NULL;
732}
733
734/*
735 * Extracts the next argument from the command line, double quotes are allowed here.
736 */
737char * getNextArg(char ** argPtr, char * val)
738{
739 char * ptr = *argPtr;
740 const char * strStart;
741 int len = 0;
742 bool isQuoted = false;
743
744 *val = '\0';
745
746 // Scan for the next non-whitespace character.
747 while ( *ptr && (*ptr == ' ' || *ptr == '=') )
748 {
749 ptr++;
750 }
751
752 strStart = ptr;
753
754 // Skip the leading double quote character.
755 if (*ptr == '\"')
756 {
757 isQuoted = true;
758 ptr++;
759 strStart++;
760 }
761
762 // Scan for the argument terminator character.
763 // This can be either a NULL character - in case we reach the end of the string,
764 // a double quote in case of quoted argument,
765 // or a whitespace character (' ' or '=') for non-quoted argument.
766 while (*ptr && !( (isQuoted && (*ptr == '\"')) ||
767 (!isQuoted && (*ptr == ' ' || *ptr == '=')) )
768 )
769 {
770 ptr++;
771 }
772
773 len = ptr - strStart;
774
775 // Skip the closing double quote character and adjust
776 // the starting pointer for the next getNextArg call.
777 if (*ptr && isQuoted && *ptr == '\"')
778 ptr++;
779
780 // Copy the extracted argument to val.
781 strncat(val, strStart, len);
782
783 // Set command line pointer.
784 *argPtr = ptr;
785
786 return ptr;
787}
788

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