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s4-winsrepl: don't put in attributes with no elements
[Samba/cd1.git] / source3 / lib / util.c
blobb066a0d3464c6da5b3c569b746ee7f6517956fb0
1 /*
2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2007
6 Copyright (C) Simo Sorce 2001
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8 Copyright (C) James Peach 2006
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25
26 extern char *global_clobber_region_function;
27 extern unsigned int global_clobber_region_line;
28
29 /* Max allowable allococation - 256mb - 0x10000000 */
30 #define MAX_ALLOC_SIZE (1024*1024*256)
31
32 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
33 #ifdef WITH_NISPLUS_HOME
34 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
35 /*
36 * The following lines are needed due to buggy include files
37 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
38 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
39 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
40 * an enum in /usr/include/rpcsvc/nis.h.
41 */
42
43 #if defined(GROUP)
44 #undef GROUP
45 #endif
46
47 #if defined(GROUP_OBJ)
48 #undef GROUP_OBJ
49 #endif
50
51 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
52
53 #include <rpcsvc/nis.h>
54
55 #endif /* WITH_NISPLUS_HOME */
56 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
57
58 enum protocol_types Protocol = PROTOCOL_COREPLUS;
59
60 static enum remote_arch_types ra_type = RA_UNKNOWN;
61
62 /***********************************************************************
63 Definitions for all names.
64 ***********************************************************************/
65
66 static char *smb_myname;
67 static char *smb_myworkgroup;
68 static char *smb_scope;
69 static int smb_num_netbios_names;
70 static char **smb_my_netbios_names;
71
72 /***********************************************************************
73 Allocate and set myname. Ensure upper case.
74 ***********************************************************************/
75
76 bool set_global_myname(const char *myname)
77 {
78 SAFE_FREE(smb_myname);
79 smb_myname = SMB_STRDUP(myname);
80 if (!smb_myname)
81 return False;
82 strupper_m(smb_myname);
83 return True;
84 }
85
86 const char *global_myname(void)
87 {
88 return smb_myname;
89 }
90
91 /***********************************************************************
92 Allocate and set myworkgroup. Ensure upper case.
93 ***********************************************************************/
94
95 bool set_global_myworkgroup(const char *myworkgroup)
96 {
97 SAFE_FREE(smb_myworkgroup);
98 smb_myworkgroup = SMB_STRDUP(myworkgroup);
99 if (!smb_myworkgroup)
100 return False;
101 strupper_m(smb_myworkgroup);
102 return True;
103 }
104
105 const char *lp_workgroup(void)
106 {
107 return smb_myworkgroup;
108 }
109
110 /***********************************************************************
111 Allocate and set scope. Ensure upper case.
112 ***********************************************************************/
113
114 bool set_global_scope(const char *scope)
115 {
116 SAFE_FREE(smb_scope);
117 smb_scope = SMB_STRDUP(scope);
118 if (!smb_scope)
119 return False;
120 strupper_m(smb_scope);
121 return True;
122 }
123
124 /*********************************************************************
125 Ensure scope is never null string.
126 *********************************************************************/
127
128 const char *global_scope(void)
129 {
130 if (!smb_scope)
131 set_global_scope("");
132 return smb_scope;
133 }
134
135 static void free_netbios_names_array(void)
136 {
137 int i;
138
139 for (i = 0; i < smb_num_netbios_names; i++)
140 SAFE_FREE(smb_my_netbios_names[i]);
141
142 SAFE_FREE(smb_my_netbios_names);
143 smb_num_netbios_names = 0;
144 }
145
146 static bool allocate_my_netbios_names_array(size_t number)
147 {
148 free_netbios_names_array();
149
150 smb_num_netbios_names = number + 1;
151 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
152
153 if (!smb_my_netbios_names)
154 return False;
155
156 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
157 return True;
158 }
159
160 static bool set_my_netbios_names(const char *name, int i)
161 {
162 SAFE_FREE(smb_my_netbios_names[i]);
163
164 smb_my_netbios_names[i] = SMB_STRDUP(name);
165 if (!smb_my_netbios_names[i])
166 return False;
167 strupper_m(smb_my_netbios_names[i]);
168 return True;
169 }
170
171 /***********************************************************************
172 Free memory allocated to global objects
173 ***********************************************************************/
174
175 void gfree_names(void)
176 {
177 SAFE_FREE( smb_myname );
178 SAFE_FREE( smb_myworkgroup );
179 SAFE_FREE( smb_scope );
180 free_netbios_names_array();
181 free_local_machine_name();
182 }
183
184 void gfree_all( void )
185 {
186 gfree_names();
187 gfree_loadparm();
188 gfree_case_tables();
189 gfree_charcnv();
190 gfree_interfaces();
191 gfree_debugsyms();
192 }
193
194 const char *my_netbios_names(int i)
195 {
196 return smb_my_netbios_names[i];
197 }
198
199 bool set_netbios_aliases(const char **str_array)
200 {
201 size_t namecount;
202
203 /* Work out the max number of netbios aliases that we have */
204 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
205 ;
206
207 if ( global_myname() && *global_myname())
208 namecount++;
209
210 /* Allocate space for the netbios aliases */
211 if (!allocate_my_netbios_names_array(namecount))
212 return False;
213
214 /* Use the global_myname string first */
215 namecount=0;
216 if ( global_myname() && *global_myname()) {
217 set_my_netbios_names( global_myname(), namecount );
218 namecount++;
219 }
220
221 if (str_array) {
222 size_t i;
223 for ( i = 0; str_array[i] != NULL; i++) {
224 size_t n;
225 bool duplicate = False;
226
227 /* Look for duplicates */
228 for( n=0; n<namecount; n++ ) {
229 if( strequal( str_array[i], my_netbios_names(n) ) ) {
230 duplicate = True;
231 break;
232 }
233 }
234 if (!duplicate) {
235 if (!set_my_netbios_names(str_array[i], namecount))
236 return False;
237 namecount++;
238 }
239 }
240 }
241 return True;
242 }
243
244 /****************************************************************************
245 Common name initialization code.
246 ****************************************************************************/
247
248 bool init_names(void)
249 {
250 int n;
251
252 if (global_myname() == NULL || *global_myname() == '\0') {
253 if (!set_global_myname(myhostname())) {
254 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
255 return False;
256 }
257 }
258
259 if (!set_netbios_aliases(lp_netbios_aliases())) {
260 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
261 return False;
262 }
263
264 set_local_machine_name(global_myname(),false);
265
266 DEBUG( 5, ("Netbios name list:-\n") );
267 for( n=0; my_netbios_names(n); n++ ) {
268 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
269 n, my_netbios_names(n) ) );
270 }
271
272 return( True );
273 }
274
275 /**************************************************************************n
276 Code to cope with username/password auth options from the commandline.
277 Used mainly in client tools.
278 ****************************************************************************/
279
280 struct user_auth_info *user_auth_info_init(TALLOC_CTX *mem_ctx)
281 {
282 struct user_auth_info *result;
283
284 result = TALLOC_ZERO_P(mem_ctx, struct user_auth_info);
285 if (result == NULL) {
286 return NULL;
287 }
288
289 result->signing_state = Undefined;
290 return result;
291 }
292
293 const char *get_cmdline_auth_info_username(const struct user_auth_info *auth_info)
294 {
295 if (!auth_info->username) {
296 return "";
297 }
298 return auth_info->username;
299 }
300
301 void set_cmdline_auth_info_username(struct user_auth_info *auth_info,
302 const char *username)
303 {
304 TALLOC_FREE(auth_info->username);
305 auth_info->username = talloc_strdup(auth_info, username);
306 if (!auth_info->username) {
307 exit(ENOMEM);
308 }
309 }
310
311 const char *get_cmdline_auth_info_domain(const struct user_auth_info *auth_info)
312 {
313 if (!auth_info->domain) {
314 return "";
315 }
316 return auth_info->domain;
317 }
318
319 void set_cmdline_auth_info_domain(struct user_auth_info *auth_info,
320 const char *domain)
321 {
322 TALLOC_FREE(auth_info->domain);
323 auth_info->domain = talloc_strdup(auth_info, domain);
324 if (!auth_info->domain) {
325 exit(ENOMEM);
326 }
327 }
328
329 const char *get_cmdline_auth_info_password(const struct user_auth_info *auth_info)
330 {
331 if (!auth_info->password) {
332 return "";
333 }
334 return auth_info->password;
335 }
336
337 void set_cmdline_auth_info_password(struct user_auth_info *auth_info,
338 const char *password)
339 {
340 TALLOC_FREE(auth_info->password);
341 if (password == NULL) {
342 password = "";
343 }
344 auth_info->password = talloc_strdup(auth_info, password);
345 if (!auth_info->password) {
346 exit(ENOMEM);
347 }
348 auth_info->got_pass = true;
349 }
350
351 bool set_cmdline_auth_info_signing_state(struct user_auth_info *auth_info,
352 const char *arg)
353 {
354 auth_info->signing_state = -1;
355 if (strequal(arg, "off") || strequal(arg, "no") ||
356 strequal(arg, "false")) {
357 auth_info->signing_state = false;
358 } else if (strequal(arg, "on") || strequal(arg, "yes") ||
359 strequal(arg, "true") || strequal(arg, "auto")) {
360 auth_info->signing_state = true;
361 } else if (strequal(arg, "force") || strequal(arg, "required") ||
362 strequal(arg, "forced")) {
363 auth_info->signing_state = Required;
364 } else {
365 return false;
366 }
367 return true;
368 }
369
370 int get_cmdline_auth_info_signing_state(const struct user_auth_info *auth_info)
371 {
372 return auth_info->signing_state;
373 }
374
375 void set_cmdline_auth_info_use_kerberos(struct user_auth_info *auth_info,
376 bool b)
377 {
378 auth_info->use_kerberos = b;
379 }
380
381 bool get_cmdline_auth_info_use_kerberos(const struct user_auth_info *auth_info)
382 {
383 return auth_info->use_kerberos;
384 }
385
386 void set_cmdline_auth_info_fallback_after_kerberos(struct user_auth_info *auth_info,
387 bool b)
388 {
389 auth_info->fallback_after_kerberos = b;
390 }
391
392 bool get_cmdline_auth_info_fallback_after_kerberos(const struct user_auth_info *auth_info)
393 {
394 return auth_info->fallback_after_kerberos;
395 }
396
397 /* This should only be used by lib/popt_common.c JRA */
398 void set_cmdline_auth_info_use_krb5_ticket(struct user_auth_info *auth_info)
399 {
400 auth_info->use_kerberos = true;
401 auth_info->got_pass = true;
402 }
403
404 /* This should only be used by lib/popt_common.c JRA */
405 void set_cmdline_auth_info_smb_encrypt(struct user_auth_info *auth_info)
406 {
407 auth_info->smb_encrypt = true;
408 }
409
410 void set_cmdline_auth_info_use_machine_account(struct user_auth_info *auth_info)
411 {
412 auth_info->use_machine_account = true;
413 }
414
415 bool get_cmdline_auth_info_got_pass(const struct user_auth_info *auth_info)
416 {
417 return auth_info->got_pass;
418 }
419
420 bool get_cmdline_auth_info_smb_encrypt(const struct user_auth_info *auth_info)
421 {
422 return auth_info->smb_encrypt;
423 }
424
425 bool get_cmdline_auth_info_use_machine_account(const struct user_auth_info *auth_info)
426 {
427 return auth_info->use_machine_account;
428 }
429
430 struct user_auth_info *get_cmdline_auth_info_copy(TALLOC_CTX *mem_ctx,
431 const struct user_auth_info *src)
432 {
433 struct user_auth_info *result;
434
435 result = user_auth_info_init(mem_ctx);
436 if (result == NULL) {
437 return NULL;
438 }
439
440 *result = *src;
441
442 result->username = talloc_strdup(
443 result, get_cmdline_auth_info_username(src));
444 result->password = talloc_strdup(
445 result, get_cmdline_auth_info_password(src));
446 if ((result->username == NULL) || (result->password == NULL)) {
447 TALLOC_FREE(result);
448 return NULL;
449 }
450
451 return result;
452 }
453
454 bool set_cmdline_auth_info_machine_account_creds(struct user_auth_info *auth_info)
455 {
456 char *pass = NULL;
457 char *account = NULL;
458
459 if (!get_cmdline_auth_info_use_machine_account(auth_info)) {
460 return false;
461 }
462
463 if (!secrets_init()) {
464 d_printf("ERROR: Unable to open secrets database\n");
465 return false;
466 }
467
468 if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
469 return false;
470 }
471
472 pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
473 if (!pass) {
474 d_printf("ERROR: Unable to fetch machine password for "
475 "%s in domain %s\n",
476 account, lp_workgroup());
477 SAFE_FREE(account);
478 return false;
479 }
480
481 set_cmdline_auth_info_username(auth_info, account);
482 set_cmdline_auth_info_password(auth_info, pass);
483
484 SAFE_FREE(account);
485 SAFE_FREE(pass);
486
487 return true;
488 }
489
490 /****************************************************************************
491 Ensure we have a password if one not given.
492 ****************************************************************************/
493
494 void set_cmdline_auth_info_getpass(struct user_auth_info *auth_info)
495 {
496 char *label = NULL;
497 char *pass;
498 TALLOC_CTX *frame;
499
500 if (get_cmdline_auth_info_got_pass(auth_info) ||
501 get_cmdline_auth_info_use_kerberos(auth_info)) {
502 /* Already got one... */
503 return;
504 }
505
506 frame = talloc_stackframe();
507 label = talloc_asprintf(frame, "Enter %s's password: ",
508 get_cmdline_auth_info_username(auth_info));
509 pass = getpass(label);
510 if (pass) {
511 set_cmdline_auth_info_password(auth_info, pass);
512 }
513 TALLOC_FREE(frame);
514 }
515
516 /*******************************************************************
517 Check if a file exists - call vfs_file_exist for samba files.
518 ********************************************************************/
519
520 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf)
521 {
522 SMB_STRUCT_STAT st;
523 if (!sbuf)
524 sbuf = &st;
525
526 if (sys_stat(fname,sbuf) != 0)
527 return(False);
528
529 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
530 }
531
532 /*******************************************************************
533 Check if a unix domain socket exists - call vfs_file_exist for samba files.
534 ********************************************************************/
535
536 bool socket_exist(const char *fname)
537 {
538 SMB_STRUCT_STAT st;
539 if (sys_stat(fname,&st) != 0)
540 return(False);
541
542 return S_ISSOCK(st.st_ex_mode);
543 }
544
545 /*******************************************************************
546 Check if a directory exists.
547 ********************************************************************/
548
549 bool directory_exist_stat(char *dname,SMB_STRUCT_STAT *st)
550 {
551 SMB_STRUCT_STAT st2;
552 bool ret;
553
554 if (!st)
555 st = &st2;
556
557 if (sys_stat(dname,st) != 0)
558 return(False);
559
560 ret = S_ISDIR(st->st_ex_mode);
561 if(!ret)
562 errno = ENOTDIR;
563 return ret;
564 }
565
566 /*******************************************************************
567 Returns the size in bytes of the named given the stat struct.
568 ********************************************************************/
569
570 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
571 {
572 return sbuf->st_ex_size;
573 }
574
575 /*******************************************************************
576 Returns the size in bytes of the named file.
577 ********************************************************************/
578
579 SMB_OFF_T get_file_size(char *file_name)
580 {
581 SMB_STRUCT_STAT buf;
582 buf.st_ex_size = 0;
583 if(sys_stat(file_name,&buf) != 0)
584 return (SMB_OFF_T)-1;
585 return get_file_size_stat(&buf);
586 }
587
588 /*******************************************************************
589 Return a string representing an attribute for a file.
590 ********************************************************************/
591
592 char *attrib_string(uint16 mode)
593 {
594 fstring attrstr;
595
596 attrstr[0] = 0;
597
598 if (mode & aVOLID) fstrcat(attrstr,"V");
599 if (mode & aDIR) fstrcat(attrstr,"D");
600 if (mode & aARCH) fstrcat(attrstr,"A");
601 if (mode & aHIDDEN) fstrcat(attrstr,"H");
602 if (mode & aSYSTEM) fstrcat(attrstr,"S");
603 if (mode & aRONLY) fstrcat(attrstr,"R");
604
605 return talloc_strdup(talloc_tos(), attrstr);
606 }
607
608 /*******************************************************************
609 Show a smb message structure.
610 ********************************************************************/
611
612 void show_msg(char *buf)
613 {
614 int i;
615 int bcc=0;
616
617 if (!DEBUGLVL(5))
618 return;
619
620 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
621 smb_len(buf),
622 (int)CVAL(buf,smb_com),
623 (int)CVAL(buf,smb_rcls),
624 (int)CVAL(buf,smb_reh),
625 (int)SVAL(buf,smb_err),
626 (int)CVAL(buf,smb_flg),
627 (int)SVAL(buf,smb_flg2)));
628 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
629 (int)SVAL(buf,smb_tid),
630 (int)SVAL(buf,smb_pid),
631 (int)SVAL(buf,smb_uid),
632 (int)SVAL(buf,smb_mid)));
633 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
634
635 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
636 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
637 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
638
639 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
640
641 DEBUGADD(5,("smb_bcc=%d\n",bcc));
642
643 if (DEBUGLEVEL < 10)
644 return;
645
646 if (DEBUGLEVEL < 50)
647 bcc = MIN(bcc, 512);
648
649 dump_data(10, (uint8 *)smb_buf(buf), bcc);
650 }
651
652 /*******************************************************************
653 Set the length and marker of an encrypted smb packet.
654 ********************************************************************/
655
656 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
657 {
658 _smb_setlen(buf,len);
659
660 SCVAL(buf,4,0xFF);
661 SCVAL(buf,5,'E');
662 SSVAL(buf,6,enc_ctx_num);
663 }
664
665 /*******************************************************************
666 Set the length and marker of an smb packet.
667 ********************************************************************/
668
669 void smb_setlen(char *buf,int len)
670 {
671 _smb_setlen(buf,len);
672
673 SCVAL(buf,4,0xFF);
674 SCVAL(buf,5,'S');
675 SCVAL(buf,6,'M');
676 SCVAL(buf,7,'B');
677 }
678
679 /*******************************************************************
680 Setup only the byte count for a smb message.
681 ********************************************************************/
682
683 int set_message_bcc(char *buf,int num_bytes)
684 {
685 int num_words = CVAL(buf,smb_wct);
686 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
687 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
688 return (smb_size + num_words*2 + num_bytes);
689 }
690
691 /*******************************************************************
692 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
693 Return the bytes added
694 ********************************************************************/
695
696 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
697 {
698 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
699 uint8 *tmp;
700
701 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
702 DEBUG(0, ("talloc failed\n"));
703 return -1;
704 }
705 *outbuf = tmp;
706
707 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
708 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
709 return blob.length;
710 }
711
712 /*******************************************************************
713 Reduce a file name, removing .. elements.
714 ********************************************************************/
715
716 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
717 {
718 char *p = NULL;
719 char *str = NULL;
720
721 DEBUG(3,("dos_clean_name [%s]\n",s));
722
723 /* remove any double slashes */
724 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
725 if (!str) {
726 return NULL;
727 }
728
729 /* Remove leading .\\ characters */
730 if(strncmp(str, ".\\", 2) == 0) {
731 trim_string(str, ".\\", NULL);
732 if(*str == 0) {
733 str = talloc_strdup(ctx, ".\\");
734 if (!str) {
735 return NULL;
736 }
737 }
738 }
739
740 while ((p = strstr_m(str,"\\..\\")) != NULL) {
741 char *s1;
742
743 *p = 0;
744 s1 = p+3;
745
746 if ((p=strrchr_m(str,'\\')) != NULL) {
747 *p = 0;
748 } else {
749 *str = 0;
750 }
751 str = talloc_asprintf(ctx,
752 "%s%s",
753 str,
754 s1);
755 if (!str) {
756 return NULL;
757 }
758 }
759
760 trim_string(str,NULL,"\\..");
761 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
762 }
763
764 /*******************************************************************
765 Reduce a file name, removing .. elements.
766 ********************************************************************/
767
768 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
769 {
770 char *p = NULL;
771 char *str = NULL;
772
773 DEBUG(3,("unix_clean_name [%s]\n",s));
774
775 /* remove any double slashes */
776 str = talloc_all_string_sub(ctx, s, "//","/");
777 if (!str) {
778 return NULL;
779 }
780
781 /* Remove leading ./ characters */
782 if(strncmp(str, "./", 2) == 0) {
783 trim_string(str, "./", NULL);
784 if(*str == 0) {
785 str = talloc_strdup(ctx, "./");
786 if (!str) {
787 return NULL;
788 }
789 }
790 }
791
792 while ((p = strstr_m(str,"/../")) != NULL) {
793 char *s1;
794
795 *p = 0;
796 s1 = p+3;
797
798 if ((p=strrchr_m(str,'/')) != NULL) {
799 *p = 0;
800 } else {
801 *str = 0;
802 }
803 str = talloc_asprintf(ctx,
804 "%s%s",
805 str,
806 s1);
807 if (!str) {
808 return NULL;
809 }
810 }
811
812 trim_string(str,NULL,"/..");
813 return talloc_all_string_sub(ctx, str, "/./", "/");
814 }
815
816 char *clean_name(TALLOC_CTX *ctx, const char *s)
817 {
818 char *str = dos_clean_name(ctx, s);
819 if (!str) {
820 return NULL;
821 }
822 return unix_clean_name(ctx, str);
823 }
824
825 /*******************************************************************
826 Write data into an fd at a given offset. Ignore seek errors.
827 ********************************************************************/
828
829 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
830 {
831 size_t total=0;
832 ssize_t ret;
833
834 if (pos == (SMB_OFF_T)-1) {
835 return write_data(fd, buffer, N);
836 }
837 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
838 while (total < N) {
839 ret = sys_pwrite(fd,buffer + total,N - total, pos);
840 if (ret == -1 && errno == ESPIPE) {
841 return write_data(fd, buffer + total,N - total);
842 }
843 if (ret == -1) {
844 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
845 return -1;
846 }
847 if (ret == 0) {
848 return total;
849 }
850 total += ret;
851 pos += ret;
852 }
853 return (ssize_t)total;
854 #else
855 /* Use lseek and write_data. */
856 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
857 if (errno != ESPIPE) {
858 return -1;
859 }
860 }
861 return write_data(fd, buffer, N);
862 #endif
863 }
864
865 /*******************************************************************
866 Sleep for a specified number of milliseconds.
867 ********************************************************************/
868
869 void smb_msleep(unsigned int t)
870 {
871 #if defined(HAVE_NANOSLEEP)
872 struct timespec tval;
873 int ret;
874
875 tval.tv_sec = t/1000;
876 tval.tv_nsec = 1000000*(t%1000);
877
878 do {
879 errno = 0;
880 ret = nanosleep(&tval, &tval);
881 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
882 #else
883 unsigned int tdiff=0;
884 struct timeval tval,t1,t2;
885 fd_set fds;
886
887 GetTimeOfDay(&t1);
888 t2 = t1;
889
890 while (tdiff < t) {
891 tval.tv_sec = (t-tdiff)/1000;
892 tval.tv_usec = 1000*((t-tdiff)%1000);
893
894 /* Never wait for more than 1 sec. */
895 if (tval.tv_sec > 1) {
896 tval.tv_sec = 1;
897 tval.tv_usec = 0;
898 }
899
900 FD_ZERO(&fds);
901 errno = 0;
902 sys_select_intr(0,&fds,NULL,NULL,&tval);
903
904 GetTimeOfDay(&t2);
905 if (t2.tv_sec < t1.tv_sec) {
906 /* Someone adjusted time... */
907 t1 = t2;
908 }
909
910 tdiff = TvalDiff(&t1,&t2);
911 }
912 #endif
913 }
914
915 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
916 struct event_context *ev_ctx,
917 bool parent_longlived)
918 {
919 NTSTATUS status = NT_STATUS_OK;
920
921 /* Reset the state of the random
922 * number generation system, so
923 * children do not get the same random
924 * numbers as each other */
925 set_need_random_reseed();
926
927 /* tdb needs special fork handling */
928 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
929 DEBUG(0,("tdb_reopen_all failed.\n"));
930 status = NT_STATUS_OPEN_FAILED;
931 goto done;
932 }
933
934 if (ev_ctx) {
935 event_context_reinit(ev_ctx);
936 }
937
938 if (msg_ctx) {
939 /*
940 * For clustering, we need to re-init our ctdbd connection after the
941 * fork
942 */
943 status = messaging_reinit(msg_ctx);
944 if (!NT_STATUS_IS_OK(status)) {
945 DEBUG(0,("messaging_reinit() failed: %s\n",
946 nt_errstr(status)));
947 }
948 }
949 done:
950 return status;
951 }
952
953 /****************************************************************************
954 Put up a yes/no prompt.
955 ****************************************************************************/
956
957 bool yesno(const char *p)
958 {
959 char ans[20];
960 printf("%s",p);
961
962 if (!fgets(ans,sizeof(ans)-1,stdin))
963 return(False);
964
965 if (*ans == 'y' || *ans == 'Y')
966 return(True);
967
968 return(False);
969 }
970
971 #if defined(PARANOID_MALLOC_CHECKER)
972
973 /****************************************************************************
974 Internal malloc wrapper. Externally visible.
975 ****************************************************************************/
976
977 void *malloc_(size_t size)
978 {
979 if (size == 0) {
980 return NULL;
981 }
982 #undef malloc
983 return malloc(size);
984 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
985 }
986
987 /****************************************************************************
988 Internal calloc wrapper. Not externally visible.
989 ****************************************************************************/
990
991 static void *calloc_(size_t count, size_t size)
992 {
993 if (size == 0 || count == 0) {
994 return NULL;
995 }
996 #undef calloc
997 return calloc(count, size);
998 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
999 }
1000
1001 /****************************************************************************
1002 Internal realloc wrapper. Not externally visible.
1003 ****************************************************************************/
1004
1005 static void *realloc_(void *ptr, size_t size)
1006 {
1007 #undef realloc
1008 return realloc(ptr, size);
1009 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
1010 }
1011
1012 #endif /* PARANOID_MALLOC_CHECKER */
1013
1014 /****************************************************************************
1015 Type-safe memalign
1016 ****************************************************************************/
1017
1018 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1019 {
1020 if (count >= MAX_ALLOC_SIZE/el_size) {
1021 return NULL;
1022 }
1023
1024 return sys_memalign(align, el_size*count);
1025 }
1026
1027 /****************************************************************************
1028 Type-safe calloc.
1029 ****************************************************************************/
1030
1031 void *calloc_array(size_t size, size_t nmemb)
1032 {
1033 if (nmemb >= MAX_ALLOC_SIZE/size) {
1034 return NULL;
1035 }
1036 if (size == 0 || nmemb == 0) {
1037 return NULL;
1038 }
1039 #if defined(PARANOID_MALLOC_CHECKER)
1040 return calloc_(nmemb, size);
1041 #else
1042 return calloc(nmemb, size);
1043 #endif
1044 }
1045
1046 /****************************************************************************
1047 Expand a pointer to be a particular size.
1048 Note that this version of Realloc has an extra parameter that decides
1049 whether to free the passed in storage on allocation failure or if the
1050 new size is zero.
1051
1052 This is designed for use in the typical idiom of :
1053
1054 p = SMB_REALLOC(p, size)
1055 if (!p) {
1056 return error;
1057 }
1058
1059 and not to have to keep track of the old 'p' contents to free later, nor
1060 to worry if the size parameter was zero. In the case where NULL is returned
1061 we guarentee that p has been freed.
1062
1063 If free later semantics are desired, then pass 'free_old_on_error' as False which
1064 guarentees that the old contents are not freed on error, even if size == 0. To use
1065 this idiom use :
1066
1067 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1068 if (!tmp) {
1069 SAFE_FREE(p);
1070 return error;
1071 } else {
1072 p = tmp;
1073 }
1074
1075 Changes were instigated by Coverity error checking. JRA.
1076 ****************************************************************************/
1077
1078 void *Realloc(void *p, size_t size, bool free_old_on_error)
1079 {
1080 void *ret=NULL;
1081
1082 if (size == 0) {
1083 if (free_old_on_error) {
1084 SAFE_FREE(p);
1085 }
1086 DEBUG(2,("Realloc asked for 0 bytes\n"));
1087 return NULL;
1088 }
1089
1090 #if defined(PARANOID_MALLOC_CHECKER)
1091 if (!p) {
1092 ret = (void *)malloc_(size);
1093 } else {
1094 ret = (void *)realloc_(p,size);
1095 }
1096 #else
1097 if (!p) {
1098 ret = (void *)malloc(size);
1099 } else {
1100 ret = (void *)realloc(p,size);
1101 }
1102 #endif
1103
1104 if (!ret) {
1105 if (free_old_on_error && p) {
1106 SAFE_FREE(p);
1107 }
1108 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1109 }
1110
1111 return(ret);
1112 }
1113
1114 /****************************************************************************
1115 (Hopefully) efficient array append.
1116 ****************************************************************************/
1117
1118 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1119 void *element, void *_array, uint32 *num_elements,
1120 ssize_t *array_size)
1121 {
1122 void **array = (void **)_array;
1123
1124 if (*array_size < 0) {
1125 return;
1126 }
1127
1128 if (*array == NULL) {
1129 if (*array_size == 0) {
1130 *array_size = 128;
1131 }
1132
1133 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1134 goto error;
1135 }
1136
1137 *array = TALLOC(mem_ctx, element_size * (*array_size));
1138 if (*array == NULL) {
1139 goto error;
1140 }
1141 }
1142
1143 if (*num_elements == *array_size) {
1144 *array_size *= 2;
1145
1146 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1147 goto error;
1148 }
1149
1150 *array = TALLOC_REALLOC(mem_ctx, *array,
1151 element_size * (*array_size));
1152
1153 if (*array == NULL) {
1154 goto error;
1155 }
1156 }
1157
1158 memcpy((char *)(*array) + element_size*(*num_elements),
1159 element, element_size);
1160 *num_elements += 1;
1161
1162 return;
1163
1164 error:
1165 *num_elements = 0;
1166 *array_size = -1;
1167 }
1168
1169 /****************************************************************************
1170 Get my own domain name, or "" if we have none.
1171 ****************************************************************************/
1172
1173 char *get_mydnsdomname(TALLOC_CTX *ctx)
1174 {
1175 const char *domname;
1176 char *p;
1177
1178 domname = get_mydnsfullname();
1179 if (!domname) {
1180 return NULL;
1181 }
1182
1183 p = strchr_m(domname, '.');
1184 if (p) {
1185 p++;
1186 return talloc_strdup(ctx, p);
1187 } else {
1188 return talloc_strdup(ctx, "");
1189 }
1190 }
1191
1192 /****************************************************************************
1193 Interpret a protocol description string, with a default.
1194 ****************************************************************************/
1195
1196 int interpret_protocol(const char *str,int def)
1197 {
1198 if (strequal(str,"NT1"))
1199 return(PROTOCOL_NT1);
1200 if (strequal(str,"LANMAN2"))
1201 return(PROTOCOL_LANMAN2);
1202 if (strequal(str,"LANMAN1"))
1203 return(PROTOCOL_LANMAN1);
1204 if (strequal(str,"CORE"))
1205 return(PROTOCOL_CORE);
1206 if (strequal(str,"COREPLUS"))
1207 return(PROTOCOL_COREPLUS);
1208 if (strequal(str,"CORE+"))
1209 return(PROTOCOL_COREPLUS);
1210
1211 DEBUG(0,("Unrecognised protocol level %s\n",str));
1212
1213 return(def);
1214 }
1215
1216
1217 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1218 /******************************************************************
1219 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1220 Based on a fix from <Thomas.Hepper@icem.de>.
1221 Returns a malloc'ed string.
1222 *******************************************************************/
1223
1224 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1225 {
1226 if (*str == '-') {
1227 const char *p = str;
1228 while(*p && !isspace(*p))
1229 p++;
1230 while(*p && isspace(*p))
1231 p++;
1232 if(*p) {
1233 return talloc_strdup(ctx, p);
1234 }
1235 }
1236 return NULL;
1237 }
1238
1239 /*******************************************************************
1240 Patch from jkf@soton.ac.uk
1241 Split Luke's automount_server into YP lookup and string splitter
1242 so can easily implement automount_path().
1243 Returns a malloc'ed string.
1244 *******************************************************************/
1245
1246 #ifdef WITH_NISPLUS_HOME
1247 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1248 {
1249 char *value = NULL;
1250
1251 char *nis_map = (char *)lp_nis_home_map_name();
1252
1253 char buffer[NIS_MAXATTRVAL + 1];
1254 nis_result *result;
1255 nis_object *object;
1256 entry_obj *entry;
1257
1258 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1259 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1260
1261 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1262 if (result->status != NIS_SUCCESS) {
1263 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1264 } else {
1265 object = result->objects.objects_val;
1266 if (object->zo_data.zo_type == ENTRY_OBJ) {
1267 entry = &object->zo_data.objdata_u.en_data;
1268 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1269 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1270
1271 value = talloc_strdup(ctx,
1272 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1273 if (!value) {
1274 nis_freeresult(result);
1275 return NULL;
1276 }
1277 value = talloc_string_sub(ctx,
1278 value,
1279 "&",
1280 user_name);
1281 }
1282 }
1283 }
1284 nis_freeresult(result);
1285
1286 if (value) {
1287 value = strip_mount_options(ctx, value);
1288 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1289 user_name, value));
1290 }
1291 return value;
1292 }
1293 #else /* WITH_NISPLUS_HOME */
1294
1295 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1296 {
1297 char *value = NULL;
1298
1299 int nis_error; /* returned by yp all functions */
1300 char *nis_result; /* yp_match inits this */
1301 int nis_result_len; /* and set this */
1302 char *nis_domain; /* yp_get_default_domain inits this */
1303 char *nis_map = (char *)lp_nis_home_map_name();
1304
1305 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1306 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1307 return NULL;
1308 }
1309
1310 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1311
1312 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1313 strlen(user_name), &nis_result,
1314 &nis_result_len)) == 0) {
1315 value = talloc_strdup(ctx, nis_result);
1316 if (!value) {
1317 return NULL;
1318 }
1319 value = strip_mount_options(ctx, value);
1320 } else if(nis_error == YPERR_KEY) {
1321 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1322 user_name, nis_map));
1323 DEBUG(3, ("using defaults for server and home directory\n"));
1324 } else {
1325 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1326 yperr_string(nis_error), user_name, nis_map));
1327 }
1328
1329 if (value) {
1330 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1331 }
1332 return value;
1333 }
1334 #endif /* WITH_NISPLUS_HOME */
1335 #endif
1336
1337 /****************************************************************************
1338 Check if a process exists. Does this work on all unixes?
1339 ****************************************************************************/
1340
1341 bool process_exists(const struct server_id pid)
1342 {
1343 if (procid_is_me(&pid)) {
1344 return True;
1345 }
1346
1347 if (procid_is_local(&pid)) {
1348 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1349 }
1350
1351 #ifdef CLUSTER_SUPPORT
1352 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1353 pid.pid);
1354 #else
1355 return False;
1356 #endif
1357 }
1358
1359 /*******************************************************************
1360 Convert a uid into a user name.
1361 ********************************************************************/
1362
1363 const char *uidtoname(uid_t uid)
1364 {
1365 TALLOC_CTX *ctx = talloc_tos();
1366 char *name = NULL;
1367 struct passwd *pass = NULL;
1368
1369 pass = getpwuid_alloc(ctx,uid);
1370 if (pass) {
1371 name = talloc_strdup(ctx,pass->pw_name);
1372 TALLOC_FREE(pass);
1373 } else {
1374 name = talloc_asprintf(ctx,
1375 "%ld",
1376 (long int)uid);
1377 }
1378 return name;
1379 }
1380
1381 /*******************************************************************
1382 Convert a gid into a group name.
1383 ********************************************************************/
1384
1385 char *gidtoname(gid_t gid)
1386 {
1387 struct group *grp;
1388
1389 grp = getgrgid(gid);
1390 if (grp) {
1391 return talloc_strdup(talloc_tos(), grp->gr_name);
1392 }
1393 else {
1394 return talloc_asprintf(talloc_tos(),
1395 "%d",
1396 (int)gid);
1397 }
1398 }
1399
1400 /*******************************************************************
1401 Convert a user name into a uid.
1402 ********************************************************************/
1403
1404 uid_t nametouid(const char *name)
1405 {
1406 struct passwd *pass;
1407 char *p;
1408 uid_t u;
1409
1410 pass = getpwnam_alloc(talloc_autofree_context(), name);
1411 if (pass) {
1412 u = pass->pw_uid;
1413 TALLOC_FREE(pass);
1414 return u;
1415 }
1416
1417 u = (uid_t)strtol(name, &p, 0);
1418 if ((p != name) && (*p == '\0'))
1419 return u;
1420
1421 return (uid_t)-1;
1422 }
1423
1424 /*******************************************************************
1425 Convert a name to a gid_t if possible. Return -1 if not a group.
1426 ********************************************************************/
1427
1428 gid_t nametogid(const char *name)
1429 {
1430 struct group *grp;
1431 char *p;
1432 gid_t g;
1433
1434 g = (gid_t)strtol(name, &p, 0);
1435 if ((p != name) && (*p == '\0'))
1436 return g;
1437
1438 grp = sys_getgrnam(name);
1439 if (grp)
1440 return(grp->gr_gid);
1441 return (gid_t)-1;
1442 }
1443
1444 /*******************************************************************
1445 Something really nasty happened - panic !
1446 ********************************************************************/
1447
1448 void smb_panic(const char *const why)
1449 {
1450 char *cmd;
1451 int result;
1452
1453 #ifdef DEVELOPER
1454 {
1455
1456 if (global_clobber_region_function) {
1457 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1458 global_clobber_region_function,
1459 global_clobber_region_line));
1460 }
1461 }
1462 #endif
1463
1464 DEBUG(0,("PANIC (pid %llu): %s\n",
1465 (unsigned long long)sys_getpid(), why));
1466 log_stack_trace();
1467
1468 cmd = lp_panic_action();
1469 if (cmd && *cmd) {
1470 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1471 result = system(cmd);
1472
1473 if (result == -1)
1474 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1475 strerror(errno)));
1476 else
1477 DEBUG(0, ("smb_panic(): action returned status %d\n",
1478 WEXITSTATUS(result)));
1479 }
1480
1481 dump_core();
1482 }
1483
1484 /*******************************************************************
1485 Print a backtrace of the stack to the debug log. This function
1486 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1487 exit shortly after calling it.
1488 ********************************************************************/
1489
1490 #ifdef HAVE_LIBUNWIND_H
1491 #include <libunwind.h>
1492 #endif
1493
1494 #ifdef HAVE_EXECINFO_H
1495 #include <execinfo.h>
1496 #endif
1497
1498 #ifdef HAVE_LIBEXC_H
1499 #include <libexc.h>
1500 #endif
1501
1502 void log_stack_trace(void)
1503 {
1504 #ifdef HAVE_LIBUNWIND
1505 /* Try to use libunwind before any other technique since on ia64
1506 * libunwind correctly walks the stack in more circumstances than
1507 * backtrace.
1508 */
1509 unw_cursor_t cursor;
1510 unw_context_t uc;
1511 unsigned i = 0;
1512
1513 char procname[256];
1514 unw_word_t ip, sp, off;
1515
1516 procname[sizeof(procname) - 1] = '\0';
1517
1518 if (unw_getcontext(&uc) != 0) {
1519 goto libunwind_failed;
1520 }
1521
1522 if (unw_init_local(&cursor, &uc) != 0) {
1523 goto libunwind_failed;
1524 }
1525
1526 DEBUG(0, ("BACKTRACE:\n"));
1527
1528 do {
1529 ip = sp = 0;
1530 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1531 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1532
1533 switch (unw_get_proc_name(&cursor,
1534 procname, sizeof(procname) - 1, &off) ) {
1535 case 0:
1536 /* Name found. */
1537 case -UNW_ENOMEM:
1538 /* Name truncated. */
1539 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1540 i, procname, (long long)off,
1541 (long long)ip, (long long) sp));
1542 break;
1543 default:
1544 /* case -UNW_ENOINFO: */
1545 /* case -UNW_EUNSPEC: */
1546 /* No symbol name found. */
1547 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1548 i, "<unknown symbol>",
1549 (long long)ip, (long long) sp));
1550 }
1551 ++i;
1552 } while (unw_step(&cursor) > 0);
1553
1554 return;
1555
1556 libunwind_failed:
1557 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1558
1559 #elif HAVE_BACKTRACE_SYMBOLS
1560 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1561 size_t backtrace_size;
1562 char **backtrace_strings;
1563
1564 /* get the backtrace (stack frames) */
1565 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1566 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1567
1568 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1569 (unsigned long)backtrace_size));
1570
1571 if (backtrace_strings) {
1572 int i;
1573
1574 for (i = 0; i < backtrace_size; i++)
1575 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1576
1577 /* Leak the backtrace_strings, rather than risk what free() might do */
1578 }
1579
1580 #elif HAVE_LIBEXC
1581
1582 /* The IRIX libexc library provides an API for unwinding the stack. See
1583 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1584 * since we are about to abort anyway, it hardly matters.
1585 */
1586
1587 #define NAMESIZE 32 /* Arbitrary */
1588
1589 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1590 char * names[BACKTRACE_STACK_SIZE];
1591 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1592
1593 int i;
1594 int levels;
1595
1596 ZERO_ARRAY(addrs);
1597 ZERO_ARRAY(names);
1598 ZERO_ARRAY(namebuf);
1599
1600 /* We need to be root so we can open our /proc entry to walk
1601 * our stack. It also helps when we want to dump core.
1602 */
1603 become_root();
1604
1605 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1606 names[i] = namebuf + (i * NAMESIZE);
1607 }
1608
1609 levels = trace_back_stack(0, addrs, names,
1610 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1611
1612 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1613 for (i = 0; i < levels; i++) {
1614 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1615 }
1616 #undef NAMESIZE
1617
1618 #else
1619 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1620 #endif
1621 }
1622
1623 /*******************************************************************
1624 A readdir wrapper which just returns the file name.
1625 ********************************************************************/
1626
1627 const char *readdirname(SMB_STRUCT_DIR *p)
1628 {
1629 SMB_STRUCT_DIRENT *ptr;
1630 char *dname;
1631
1632 if (!p)
1633 return(NULL);
1634
1635 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1636 if (!ptr)
1637 return(NULL);
1638
1639 dname = ptr->d_name;
1640
1641 #ifdef NEXT2
1642 if (telldir(p) < 0)
1643 return(NULL);
1644 #endif
1645
1646 #ifdef HAVE_BROKEN_READDIR_NAME
1647 /* using /usr/ucb/cc is BAD */
1648 dname = dname - 2;
1649 #endif
1650
1651 return talloc_strdup(talloc_tos(), dname);
1652 }
1653
1654 /*******************************************************************
1655 Utility function used to decide if the last component
1656 of a path matches a (possibly wildcarded) entry in a namelist.
1657 ********************************************************************/
1658
1659 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1660 {
1661 const char *last_component;
1662
1663 /* if we have no list it's obviously not in the path */
1664 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1665 return False;
1666 }
1667
1668 DEBUG(8, ("is_in_path: %s\n", name));
1669
1670 /* Get the last component of the unix name. */
1671 last_component = strrchr_m(name, '/');
1672 if (!last_component) {
1673 last_component = name;
1674 } else {
1675 last_component++; /* Go past '/' */
1676 }
1677
1678 for(; namelist->name != NULL; namelist++) {
1679 if(namelist->is_wild) {
1680 if (mask_match(last_component, namelist->name, case_sensitive)) {
1681 DEBUG(8,("is_in_path: mask match succeeded\n"));
1682 return True;
1683 }
1684 } else {
1685 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1686 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1687 DEBUG(8,("is_in_path: match succeeded\n"));
1688 return True;
1689 }
1690 }
1691 }
1692 DEBUG(8,("is_in_path: match not found\n"));
1693 return False;
1694 }
1695
1696 /*******************************************************************
1697 Strip a '/' separated list into an array of
1698 name_compare_enties structures suitable for
1699 passing to is_in_path(). We do this for
1700 speed so we can pre-parse all the names in the list
1701 and don't do it for each call to is_in_path().
1702 namelist is modified here and is assumed to be
1703 a copy owned by the caller.
1704 We also check if the entry contains a wildcard to
1705 remove a potentially expensive call to mask_match
1706 if possible.
1707 ********************************************************************/
1708
1709 void set_namearray(name_compare_entry **ppname_array, const char *namelist)
1710 {
1711 char *name_end;
1712 char *nameptr = (char *)namelist;
1713 int num_entries = 0;
1714 int i;
1715
1716 (*ppname_array) = NULL;
1717
1718 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1719 return;
1720
1721 /* We need to make two passes over the string. The
1722 first to count the number of elements, the second
1723 to split it.
1724 */
1725
1726 while(*nameptr) {
1727 if ( *nameptr == '/' ) {
1728 /* cope with multiple (useless) /s) */
1729 nameptr++;
1730 continue;
1731 }
1732 /* anything left? */
1733 if ( *nameptr == '\0' )
1734 break;
1735
1736 /* find the next '/' or consume remaining */
1737 name_end = strchr_m(nameptr, '/');
1738 if (name_end == NULL)
1739 name_end = (char *)nameptr + strlen(nameptr);
1740
1741 /* next segment please */
1742 nameptr = name_end + 1;
1743 num_entries++;
1744 }
1745
1746 if(num_entries == 0)
1747 return;
1748
1749 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1750 DEBUG(0,("set_namearray: malloc fail\n"));
1751 return;
1752 }
1753
1754 /* Now copy out the names */
1755 nameptr = (char *)namelist;
1756 i = 0;
1757 while(*nameptr) {
1758 if ( *nameptr == '/' ) {
1759 /* cope with multiple (useless) /s) */
1760 nameptr++;
1761 continue;
1762 }
1763 /* anything left? */
1764 if ( *nameptr == '\0' )
1765 break;
1766
1767 /* find the next '/' or consume remaining */
1768 name_end = strchr_m(nameptr, '/');
1769 if (name_end)
1770 *name_end = '\0';
1771 else
1772 name_end = nameptr + strlen(nameptr);
1773
1774 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1775 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1776 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1777 return;
1778 }
1779
1780 /* next segment please */
1781 nameptr = name_end + 1;
1782 i++;
1783 }
1784
1785 (*ppname_array)[i].name = NULL;
1786
1787 return;
1788 }
1789
1790 /****************************************************************************
1791 Routine to free a namearray.
1792 ****************************************************************************/
1793
1794 void free_namearray(name_compare_entry *name_array)
1795 {
1796 int i;
1797
1798 if(name_array == NULL)
1799 return;
1800
1801 for(i=0; name_array[i].name!=NULL; i++)
1802 SAFE_FREE(name_array[i].name);
1803 SAFE_FREE(name_array);
1804 }
1805
1806 #undef DBGC_CLASS
1807 #define DBGC_CLASS DBGC_LOCKING
1808
1809 /****************************************************************************
1810 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1811 is dealt with in posix.c
1812 Returns True if we have information regarding this lock region (and returns
1813 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1814 ****************************************************************************/
1815
1816 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
1817 {
1818 SMB_STRUCT_FLOCK lock;
1819 int ret;
1820
1821 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1822 fd,(double)*poffset,(double)*pcount,*ptype));
1823
1824 lock.l_type = *ptype;
1825 lock.l_whence = SEEK_SET;
1826 lock.l_start = *poffset;
1827 lock.l_len = *pcount;
1828 lock.l_pid = 0;
1829
1830 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
1831
1832 if (ret == -1) {
1833 int sav = errno;
1834 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1835 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1836 errno = sav;
1837 return False;
1838 }
1839
1840 *ptype = lock.l_type;
1841 *poffset = lock.l_start;
1842 *pcount = lock.l_len;
1843 *ppid = lock.l_pid;
1844
1845 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1846 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1847 return True;
1848 }
1849
1850 #undef DBGC_CLASS
1851 #define DBGC_CLASS DBGC_ALL
1852
1853 /*******************************************************************
1854 Is the name specified one of my netbios names.
1855 Returns true if it is equal, false otherwise.
1856 ********************************************************************/
1857
1858 bool is_myname(const char *s)
1859 {
1860 int n;
1861 bool ret = False;
1862
1863 for (n=0; my_netbios_names(n); n++) {
1864 if (strequal(my_netbios_names(n), s)) {
1865 ret=True;
1866 break;
1867 }
1868 }
1869 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1870 return(ret);
1871 }
1872
1873 /*******************************************************************
1874 Is the name specified our workgroup/domain.
1875 Returns true if it is equal, false otherwise.
1876 ********************************************************************/
1877
1878 bool is_myworkgroup(const char *s)
1879 {
1880 bool ret = False;
1881
1882 if (strequal(s, lp_workgroup())) {
1883 ret=True;
1884 }
1885
1886 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1887 return(ret);
1888 }
1889
1890 /*******************************************************************
1891 we distinguish between 2K and XP by the "Native Lan Manager" string
1892 WinXP => "Windows 2002 5.1"
1893 WinXP 64bit => "Windows XP 5.2"
1894 Win2k => "Windows 2000 5.0"
1895 NT4 => "Windows NT 4.0"
1896 Win9x => "Windows 4.0"
1897 Windows 2003 doesn't set the native lan manager string but
1898 they do set the domain to "Windows 2003 5.2" (probably a bug).
1899 ********************************************************************/
1900
1901 void ra_lanman_string( const char *native_lanman )
1902 {
1903 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1904 set_remote_arch( RA_WINXP );
1905 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1906 set_remote_arch( RA_WINXP64 );
1907 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1908 set_remote_arch( RA_WIN2K3 );
1909 }
1910
1911 static const char *remote_arch_str;
1912
1913 const char *get_remote_arch_str(void)
1914 {
1915 if (!remote_arch_str) {
1916 return "UNKNOWN";
1917 }
1918 return remote_arch_str;
1919 }
1920
1921 /*******************************************************************
1922 Set the horrid remote_arch string based on an enum.
1923 ********************************************************************/
1924
1925 void set_remote_arch(enum remote_arch_types type)
1926 {
1927 ra_type = type;
1928 switch( type ) {
1929 case RA_WFWG:
1930 remote_arch_str = "WfWg";
1931 break;
1932 case RA_OS2:
1933 remote_arch_str = "OS2";
1934 break;
1935 case RA_WIN95:
1936 remote_arch_str = "Win95";
1937 break;
1938 case RA_WINNT:
1939 remote_arch_str = "WinNT";
1940 break;
1941 case RA_WIN2K:
1942 remote_arch_str = "Win2K";
1943 break;
1944 case RA_WINXP:
1945 remote_arch_str = "WinXP";
1946 break;
1947 case RA_WINXP64:
1948 remote_arch_str = "WinXP64";
1949 break;
1950 case RA_WIN2K3:
1951 remote_arch_str = "Win2K3";
1952 break;
1953 case RA_VISTA:
1954 remote_arch_str = "Vista";
1955 break;
1956 case RA_SAMBA:
1957 remote_arch_str = "Samba";
1958 break;
1959 case RA_CIFSFS:
1960 remote_arch_str = "CIFSFS";
1961 break;
1962 default:
1963 ra_type = RA_UNKNOWN;
1964 remote_arch_str = "UNKNOWN";
1965 break;
1966 }
1967
1968 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1969 remote_arch_str));
1970 }
1971
1972 /*******************************************************************
1973 Get the remote_arch type.
1974 ********************************************************************/
1975
1976 enum remote_arch_types get_remote_arch(void)
1977 {
1978 return ra_type;
1979 }
1980
1981 const char *tab_depth(int level, int depth)
1982 {
1983 if( CHECK_DEBUGLVL(level) ) {
1984 dbgtext("%*s", depth*4, "");
1985 }
1986 return "";
1987 }
1988
1989 /*****************************************************************************
1990 Provide a checksum on a string
1991
1992 Input: s - the null-terminated character string for which the checksum
1993 will be calculated.
1994
1995 Output: The checksum value calculated for s.
1996 *****************************************************************************/
1997
1998 int str_checksum(const char *s)
1999 {
2000 int res = 0;
2001 int c;
2002 int i=0;
2003
2004 while(*s) {
2005 c = *s;
2006 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2007 s++;
2008 i++;
2009 }
2010 return(res);
2011 }
2012
2013 /*****************************************************************
2014 Zero a memory area then free it. Used to catch bugs faster.
2015 *****************************************************************/
2016
2017 void zero_free(void *p, size_t size)
2018 {
2019 memset(p, 0, size);
2020 SAFE_FREE(p);
2021 }
2022
2023 /*****************************************************************
2024 Set our open file limit to a requested max and return the limit.
2025 *****************************************************************/
2026
2027 int set_maxfiles(int requested_max)
2028 {
2029 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2030 struct rlimit rlp;
2031 int saved_current_limit;
2032
2033 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2034 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2035 strerror(errno) ));
2036 /* just guess... */
2037 return requested_max;
2038 }
2039
2040 /*
2041 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2042 * account for the extra fd we need
2043 * as well as the log files and standard
2044 * handles etc. Save the limit we want to set in case
2045 * we are running on an OS that doesn't support this limit (AIX)
2046 * which always returns RLIM_INFINITY for rlp.rlim_max.
2047 */
2048
2049 /* Try raising the hard (max) limit to the requested amount. */
2050
2051 #if defined(RLIM_INFINITY)
2052 if (rlp.rlim_max != RLIM_INFINITY) {
2053 int orig_max = rlp.rlim_max;
2054
2055 if ( rlp.rlim_max < requested_max )
2056 rlp.rlim_max = requested_max;
2057
2058 /* This failing is not an error - many systems (Linux) don't
2059 support our default request of 10,000 open files. JRA. */
2060
2061 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2062 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2063 (int)rlp.rlim_max, strerror(errno) ));
2064
2065 /* Set failed - restore original value from get. */
2066 rlp.rlim_max = orig_max;
2067 }
2068 }
2069 #endif
2070
2071 /* Now try setting the soft (current) limit. */
2072
2073 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2074
2075 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2076 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2077 (int)rlp.rlim_cur, strerror(errno) ));
2078 /* just guess... */
2079 return saved_current_limit;
2080 }
2081
2082 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2083 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2084 strerror(errno) ));
2085 /* just guess... */
2086 return saved_current_limit;
2087 }
2088
2089 #if defined(RLIM_INFINITY)
2090 if(rlp.rlim_cur == RLIM_INFINITY)
2091 return saved_current_limit;
2092 #endif
2093
2094 if((int)rlp.rlim_cur > saved_current_limit)
2095 return saved_current_limit;
2096
2097 return rlp.rlim_cur;
2098 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2099 /*
2100 * No way to know - just guess...
2101 */
2102 return requested_max;
2103 #endif
2104 }
2105
2106 /*****************************************************************
2107 malloc that aborts with smb_panic on fail or zero size.
2108 *****************************************************************/
2109
2110 void *smb_xmalloc_array(size_t size, unsigned int count)
2111 {
2112 void *p;
2113 if (size == 0) {
2114 smb_panic("smb_xmalloc_array: called with zero size");
2115 }
2116 if (count >= MAX_ALLOC_SIZE/size) {
2117 smb_panic("smb_xmalloc_array: alloc size too large");
2118 }
2119 if ((p = SMB_MALLOC(size*count)) == NULL) {
2120 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2121 (unsigned long)size, (unsigned long)count));
2122 smb_panic("smb_xmalloc_array: malloc failed");
2123 }
2124 return p;
2125 }
2126
2127 /*
2128 vasprintf that aborts on malloc fail
2129 */
2130
2131 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2132 {
2133 int n;
2134 va_list ap2;
2135
2136 va_copy(ap2, ap);
2137
2138 n = vasprintf(ptr, format, ap2);
2139 va_end(ap2);
2140 if (n == -1 || ! *ptr) {
2141 smb_panic("smb_xvasprintf: out of memory");
2142 }
2143 return n;
2144 }
2145
2146 /*****************************************************************
2147 Get local hostname and cache result.
2148 *****************************************************************/
2149
2150 char *myhostname(void)
2151 {
2152 static char *ret;
2153 if (ret == NULL) {
2154 /* This is cached forever so
2155 * use talloc_autofree_context() ctx. */
2156 ret = get_myname(talloc_autofree_context());
2157 }
2158 return ret;
2159 }
2160
2161 /**
2162 * @brief Returns an absolute path to a file concatenating the provided
2163 * @a rootpath and @a basename
2164 *
2165 * @param name Filename, relative to @a rootpath
2166 *
2167 * @retval Pointer to a string containing the full path.
2168 **/
2169
2170 static char *xx_path(const char *name, const char *rootpath)
2171 {
2172 char *fname = NULL;
2173
2174 fname = talloc_strdup(talloc_tos(), rootpath);
2175 if (!fname) {
2176 return NULL;
2177 }
2178 trim_string(fname,"","/");
2179
2180 if (!directory_exist(fname)) {
2181 if (!mkdir(fname,0755))
2182 DEBUG(1, ("Unable to create directory %s for file %s. "
2183 "Error was %s\n", fname, name, strerror(errno)));
2184 }
2185
2186 return talloc_asprintf(talloc_tos(),
2187 "%s/%s",
2188 fname,
2189 name);
2190 }
2191
2192 /**
2193 * @brief Returns an absolute path to a file in the Samba lock directory.
2194 *
2195 * @param name File to find, relative to LOCKDIR.
2196 *
2197 * @retval Pointer to a talloc'ed string containing the full path.
2198 **/
2199
2200 char *lock_path(const char *name)
2201 {
2202 return xx_path(name, lp_lockdir());
2203 }
2204
2205 /**
2206 * @brief Returns an absolute path to a file in the Samba pid directory.
2207 *
2208 * @param name File to find, relative to PIDDIR.
2209 *
2210 * @retval Pointer to a talloc'ed string containing the full path.
2211 **/
2212
2213 char *pid_path(const char *name)
2214 {
2215 return xx_path(name, lp_piddir());
2216 }
2217
2218 /**
2219 * @brief Returns an absolute path to a file in the Samba lib directory.
2220 *
2221 * @param name File to find, relative to LIBDIR.
2222 *
2223 * @retval Pointer to a string containing the full path.
2224 **/
2225
2226 char *lib_path(const char *name)
2227 {
2228 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2229 }
2230
2231 /**
2232 * @brief Returns an absolute path to a file in the Samba modules directory.
2233 *
2234 * @param name File to find, relative to MODULESDIR.
2235 *
2236 * @retval Pointer to a string containing the full path.
2237 **/
2238
2239 char *modules_path(const char *name)
2240 {
2241 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2242 }
2243
2244 /**
2245 * @brief Returns an absolute path to a file in the Samba data directory.
2246 *
2247 * @param name File to find, relative to CODEPAGEDIR.
2248 *
2249 * @retval Pointer to a talloc'ed string containing the full path.
2250 **/
2251
2252 char *data_path(const char *name)
2253 {
2254 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2255 }
2256
2257 /**
2258 * @brief Returns an absolute path to a file in the Samba state directory.
2259 *
2260 * @param name File to find, relative to STATEDIR.
2261 *
2262 * @retval Pointer to a talloc'ed string containing the full path.
2263 **/
2264
2265 char *state_path(const char *name)
2266 {
2267 return xx_path(name, lp_statedir());
2268 }
2269
2270 /**
2271 * @brief Returns an absolute path to a file in the Samba cache directory.
2272 *
2273 * @param name File to find, relative to CACHEDIR.
2274 *
2275 * @retval Pointer to a talloc'ed string containing the full path.
2276 **/
2277
2278 char *cache_path(const char *name)
2279 {
2280 return xx_path(name, lp_cachedir());
2281 }
2282
2283 /**
2284 * @brief Returns the platform specific shared library extension.
2285 *
2286 * @retval Pointer to a const char * containing the extension.
2287 **/
2288
2289 const char *shlib_ext(void)
2290 {
2291 return get_dyn_SHLIBEXT();
2292 }
2293
2294 /*******************************************************************
2295 Given a filename - get its directory name
2296 ********************************************************************/
2297
2298 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
2299 const char **name)
2300 {
2301 char *p;
2302 ptrdiff_t len;
2303
2304 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2305
2306 if (p == NULL) {
2307 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2308 return False;
2309 }
2310 if (name) {
2311 *name = dir;
2312 }
2313 return True;
2314 }
2315
2316 len = p-dir;
2317
2318 if (!(*parent = (char *)TALLOC_MEMDUP(mem_ctx, dir, len+1))) {
2319 return False;
2320 }
2321 (*parent)[len] = '\0';
2322
2323 if (name) {
2324 *name = p+1;
2325 }
2326 return True;
2327 }
2328
2329 /*******************************************************************
2330 Determine if a pattern contains any Microsoft wildcard characters.
2331 *******************************************************************/
2332
2333 bool ms_has_wild(const char *s)
2334 {
2335 char c;
2336
2337 if (lp_posix_pathnames()) {
2338 /* With posix pathnames no characters are wild. */
2339 return False;
2340 }
2341
2342 while ((c = *s++)) {
2343 switch (c) {
2344 case '*':
2345 case '?':
2346 case '<':
2347 case '>':
2348 case '"':
2349 return True;
2350 }
2351 }
2352 return False;
2353 }
2354
2355 bool ms_has_wild_w(const smb_ucs2_t *s)
2356 {
2357 smb_ucs2_t c;
2358 if (!s) return False;
2359 while ((c = *s++)) {
2360 switch (c) {
2361 case UCS2_CHAR('*'):
2362 case UCS2_CHAR('?'):
2363 case UCS2_CHAR('<'):
2364 case UCS2_CHAR('>'):
2365 case UCS2_CHAR('"'):
2366 return True;
2367 }
2368 }
2369 return False;
2370 }
2371
2372 /*******************************************************************
2373 A wrapper that handles case sensitivity and the special handling
2374 of the ".." name.
2375 *******************************************************************/
2376
2377 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2378 {
2379 if (strcmp(string,"..") == 0)
2380 string = ".";
2381 if (strcmp(pattern,".") == 0)
2382 return False;
2383
2384 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2385 }
2386
2387 /*******************************************************************
2388 A wrapper that handles case sensitivity and the special handling
2389 of the ".." name. Varient that is only called by old search code which requires
2390 pattern translation.
2391 *******************************************************************/
2392
2393 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2394 {
2395 if (strcmp(string,"..") == 0)
2396 string = ".";
2397 if (strcmp(pattern,".") == 0)
2398 return False;
2399
2400 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2401 }
2402
2403 /*******************************************************************
2404 A wrapper that handles a list of patters and calls mask_match()
2405 on each. Returns True if any of the patterns match.
2406 *******************************************************************/
2407
2408 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2409 {
2410 while (listLen-- > 0) {
2411 if (mask_match(string, *list++, is_case_sensitive))
2412 return True;
2413 }
2414 return False;
2415 }
2416
2417 /*********************************************************
2418 Recursive routine that is called by unix_wild_match.
2419 *********************************************************/
2420
2421 static bool unix_do_match(const char *regexp, const char *str)
2422 {
2423 const char *p;
2424
2425 for( p = regexp; *p && *str; ) {
2426
2427 switch(*p) {
2428 case '?':
2429 str++;
2430 p++;
2431 break;
2432
2433 case '*':
2434
2435 /*
2436 * Look for a character matching
2437 * the one after the '*'.
2438 */
2439 p++;
2440 if(!*p)
2441 return true; /* Automatic match */
2442 while(*str) {
2443
2444 while(*str && (*p != *str))
2445 str++;
2446
2447 /*
2448 * Patch from weidel@multichart.de. In the case of the regexp
2449 * '*XX*' we want to ensure there are at least 2 'X' characters
2450 * in the string after the '*' for a match to be made.
2451 */
2452
2453 {
2454 int matchcount=0;
2455
2456 /*
2457 * Eat all the characters that match, but count how many there were.
2458 */
2459
2460 while(*str && (*p == *str)) {
2461 str++;
2462 matchcount++;
2463 }
2464
2465 /*
2466 * Now check that if the regexp had n identical characters that
2467 * matchcount had at least that many matches.
2468 */
2469
2470 while ( *(p+1) && (*(p+1) == *p)) {
2471 p++;
2472 matchcount--;
2473 }
2474
2475 if ( matchcount <= 0 )
2476 return false;
2477 }
2478
2479 str--; /* We've eaten the match char after the '*' */
2480
2481 if(unix_do_match(p, str))
2482 return true;
2483
2484 if(!*str)
2485 return false;
2486 else
2487 str++;
2488 }
2489 return false;
2490
2491 default:
2492 if(*str != *p)
2493 return false;
2494 str++;
2495 p++;
2496 break;
2497 }
2498 }
2499
2500 if(!*p && !*str)
2501 return true;
2502
2503 if (!*p && str[0] == '.' && str[1] == 0)
2504 return true;
2505
2506 if (!*str && *p == '?') {
2507 while (*p == '?')
2508 p++;
2509 return(!*p);
2510 }
2511
2512 if(!*str && (*p == '*' && p[1] == '\0'))
2513 return true;
2514
2515 return false;
2516 }
2517
2518 /*******************************************************************
2519 Simple case insensitive interface to a UNIX wildcard matcher.
2520 Returns True if match, False if not.
2521 *******************************************************************/
2522
2523 bool unix_wild_match(const char *pattern, const char *string)
2524 {
2525 TALLOC_CTX *ctx = talloc_stackframe();
2526 char *p2;
2527 char *s2;
2528 char *p;
2529 bool ret = false;
2530
2531 p2 = talloc_strdup(ctx,pattern);
2532 s2 = talloc_strdup(ctx,string);
2533 if (!p2 || !s2) {
2534 TALLOC_FREE(ctx);
2535 return false;
2536 }
2537 strlower_m(p2);
2538 strlower_m(s2);
2539
2540 /* Remove any *? and ** from the pattern as they are meaningless */
2541 for(p = p2; *p; p++) {
2542 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2543 memmove(&p[1], &p[2], strlen(&p[2])+1);
2544 }
2545 }
2546
2547 if (strequal(p2,"*")) {
2548 TALLOC_FREE(ctx);
2549 return true;
2550 }
2551
2552 ret = unix_do_match(p2, s2);
2553 TALLOC_FREE(ctx);
2554 return ret;
2555 }
2556
2557 /**********************************************************************
2558 Converts a name to a fully qualified domain name.
2559 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2560 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2561 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2562 ***********************************************************************/
2563
2564 bool name_to_fqdn(fstring fqdn, const char *name)
2565 {
2566 char *full = NULL;
2567 struct hostent *hp = gethostbyname(name);
2568
2569 if (!hp || !hp->h_name || !*hp->h_name) {
2570 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2571 fstrcpy(fqdn, name);
2572 return false;
2573 }
2574
2575 /* Find out if the fqdn is returned as an alias
2576 * to cope with /etc/hosts files where the first
2577 * name is not the fqdn but the short name */
2578 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2579 int i;
2580 for (i = 0; hp->h_aliases[i]; i++) {
2581 if (strchr_m(hp->h_aliases[i], '.')) {
2582 full = hp->h_aliases[i];
2583 break;
2584 }
2585 }
2586 }
2587 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2588 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2589 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2590 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2591 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2592 full = hp->h_name;
2593 }
2594 if (!full) {
2595 full = hp->h_name;
2596 }
2597
2598 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2599 fstrcpy(fqdn, full);
2600 return true;
2601 }
2602
2603 /**********************************************************************
2604 Append a DATA_BLOB to a talloc'ed object
2605 ***********************************************************************/
2606
2607 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
2608 {
2609 size_t old_size = 0;
2610 char *result;
2611
2612 if (blob.length == 0) {
2613 return buf;
2614 }
2615
2616 if (buf != NULL) {
2617 old_size = talloc_get_size(buf);
2618 }
2619
2620 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
2621 if (result == NULL) {
2622 return NULL;
2623 }
2624
2625 memcpy(result + old_size, blob.data, blob.length);
2626 return result;
2627 }
2628
2629 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2630 {
2631 switch (share_access & ~FILE_SHARE_DELETE) {
2632 case FILE_SHARE_NONE:
2633 return DENY_ALL;
2634 case FILE_SHARE_READ:
2635 return DENY_WRITE;
2636 case FILE_SHARE_WRITE:
2637 return DENY_READ;
2638 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2639 return DENY_NONE;
2640 }
2641 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2642 return DENY_DOS;
2643 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2644 return DENY_FCB;
2645 }
2646
2647 return (uint32)-1;
2648 }
2649
2650 pid_t procid_to_pid(const struct server_id *proc)
2651 {
2652 return proc->pid;
2653 }
2654
2655 static uint32 my_vnn = NONCLUSTER_VNN;
2656
2657 void set_my_vnn(uint32 vnn)
2658 {
2659 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
2660 my_vnn = vnn;
2661 }
2662
2663 uint32 get_my_vnn(void)
2664 {
2665 return my_vnn;
2666 }
2667
2668 struct server_id pid_to_procid(pid_t pid)
2669 {
2670 struct server_id result;
2671 result.pid = pid;
2672 #ifdef CLUSTER_SUPPORT
2673 result.vnn = my_vnn;
2674 #endif
2675 return result;
2676 }
2677
2678 struct server_id procid_self(void)
2679 {
2680 return pid_to_procid(sys_getpid());
2681 }
2682
2683 struct server_id server_id_self(void)
2684 {
2685 return procid_self();
2686 }
2687
2688 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
2689 {
2690 if (p1->pid != p2->pid)
2691 return False;
2692 #ifdef CLUSTER_SUPPORT
2693 if (p1->vnn != p2->vnn)
2694 return False;
2695 #endif
2696 return True;
2697 }
2698
2699 bool cluster_id_equal(const struct server_id *id1,
2700 const struct server_id *id2)
2701 {
2702 return procid_equal(id1, id2);
2703 }
2704
2705 bool procid_is_me(const struct server_id *pid)
2706 {
2707 if (pid->pid != sys_getpid())
2708 return False;
2709 #ifdef CLUSTER_SUPPORT
2710 if (pid->vnn != my_vnn)
2711 return False;
2712 #endif
2713 return True;
2714 }
2715
2716 struct server_id interpret_pid(const char *pid_string)
2717 {
2718 struct server_id result;
2719 int pid;
2720 #ifdef CLUSTER_SUPPORT
2721 unsigned int vnn;
2722 if (sscanf(pid_string, "%u:%d", &vnn, &pid) == 2) {
2723 result.vnn = vnn;
2724 result.pid = pid;
2725 }
2726 else if (sscanf(pid_string, "%d", &pid) == 1) {
2727 result.vnn = get_my_vnn();
2728 result.pid = pid;
2729 }
2730 else {
2731 result.vnn = NONCLUSTER_VNN;
2732 result.pid = -1;
2733 }
2734 #else
2735 if (sscanf(pid_string, "%d", &pid) != 1) {
2736 result.pid = -1;
2737 } else {
2738 result.pid = pid;
2739 }
2740 #endif
2741 /* Assigning to result.pid may have overflowed
2742 Map negative pid to -1: i.e. error */
2743 if (result.pid < 0) {
2744 result.pid = -1;
2745 }
2746 return result;
2747 }
2748
2749 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
2750 {
2751 #ifdef CLUSTER_SUPPORT
2752 if (pid->vnn == NONCLUSTER_VNN) {
2753 return talloc_asprintf(mem_ctx,
2754 "%d",
2755 (int)pid->pid);
2756 }
2757 else {
2758 return talloc_asprintf(mem_ctx,
2759 "%u:%d",
2760 (unsigned)pid->vnn,
2761 (int)pid->pid);
2762 }
2763 #else
2764 return talloc_asprintf(mem_ctx,
2765 "%d",
2766 (int)pid->pid);
2767 #endif
2768 }
2769
2770 char *procid_str_static(const struct server_id *pid)
2771 {
2772 return procid_str(talloc_tos(), pid);
2773 }
2774
2775 bool procid_valid(const struct server_id *pid)
2776 {
2777 return (pid->pid != -1);
2778 }
2779
2780 bool procid_is_local(const struct server_id *pid)
2781 {
2782 #ifdef CLUSTER_SUPPORT
2783 return pid->vnn == my_vnn;
2784 #else
2785 return True;
2786 #endif
2787 }
2788
2789 int this_is_smp(void)
2790 {
2791 #if defined(HAVE_SYSCONF)
2792
2793 #if defined(SYSCONF_SC_NPROC_ONLN)
2794 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
2795 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
2796 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
2797 #else
2798 return 0;
2799 #endif
2800
2801 #else
2802 return 0;
2803 #endif
2804 }
2805
2806 /****************************************************************
2807 Check if offset/length fit into bufsize. Should probably be
2808 merged with is_offset_safe, but this would require a rewrite
2809 of lanman.c. Later :-)
2810 ****************************************************************/
2811
2812 bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
2813 {
2814 if ((offset + length < offset) || (offset + length < length)) {
2815 /* wrap */
2816 return true;
2817 }
2818 if ((offset > bufsize) || (offset + length > bufsize)) {
2819 /* overflow */
2820 return true;
2821 }
2822 return false;
2823 }
2824
2825 /****************************************************************
2826 Check if an offset into a buffer is safe.
2827 If this returns True it's safe to indirect into the byte at
2828 pointer ptr+off.
2829 ****************************************************************/
2830
2831 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2832 {
2833 const char *end_base = buf_base + buf_len;
2834 char *end_ptr = ptr + off;
2835
2836 if (!buf_base || !ptr) {
2837 return False;
2838 }
2839
2840 if (end_base < buf_base || end_ptr < ptr) {
2841 return False; /* wrap. */
2842 }
2843
2844 if (end_ptr < end_base) {
2845 return True;
2846 }
2847 return False;
2848 }
2849
2850 /****************************************************************
2851 Return a safe pointer into a buffer, or NULL.
2852 ****************************************************************/
2853
2854 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2855 {
2856 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2857 ptr + off : NULL;
2858 }
2859
2860 /****************************************************************
2861 Return a safe pointer into a string within a buffer, or NULL.
2862 ****************************************************************/
2863
2864 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2865 {
2866 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2867 return NULL;
2868 }
2869 /* Check if a valid string exists at this offset. */
2870 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2871 return NULL;
2872 }
2873 return ptr + off;
2874 }
2875
2876 /****************************************************************
2877 Return an SVAL at a pointer, or failval if beyond the end.
2878 ****************************************************************/
2879
2880 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2881 {
2882 /*
2883 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2884 * NOT ptr[2].
2885 */
2886 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2887 return failval;
2888 }
2889 return SVAL(ptr,off);
2890 }
2891
2892 /****************************************************************
2893 Return an IVAL at a pointer, or failval if beyond the end.
2894 ****************************************************************/
2895
2896 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2897 {
2898 /*
2899 * Note we use off+3 here, not off+4 as IVAL accesses
2900 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2901 */
2902 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2903 return failval;
2904 }
2905 return IVAL(ptr,off);
2906 }
2907
2908 /****************************************************************
2909 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2910 call (they take care of winbind separator and other winbind specific settings).
2911 ****************************************************************/
2912
2913 void split_domain_user(TALLOC_CTX *mem_ctx,
2914 const char *full_name,
2915 char **domain,
2916 char **user)
2917 {
2918 const char *p = NULL;
2919
2920 p = strchr_m(full_name, '\\');
2921
2922 if (p != NULL) {
2923 *domain = talloc_strndup(mem_ctx, full_name,
2924 PTR_DIFF(p, full_name));
2925 *user = talloc_strdup(mem_ctx, p+1);
2926 } else {
2927 *domain = talloc_strdup(mem_ctx, "");
2928 *user = talloc_strdup(mem_ctx, full_name);
2929 }
2930 }
2931
2932 #if 0
2933
2934 Disable these now we have checked all code paths and ensured
2935 NULL returns on zero request. JRA.
2936
2937 /****************************************************************
2938 talloc wrapper functions that guarentee a null pointer return
2939 if size == 0.
2940 ****************************************************************/
2941
2942 #ifndef MAX_TALLOC_SIZE
2943 #define MAX_TALLOC_SIZE 0x10000000
2944 #endif
2945
2946 /*
2947 * talloc and zero memory.
2948 * - returns NULL if size is zero.
2949 */
2950
2951 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
2952 {
2953 void *p;
2954
2955 if (size == 0) {
2956 return NULL;
2957 }
2958
2959 p = talloc_named_const(ctx, size, name);
2960
2961 if (p) {
2962 memset(p, '\0', size);
2963 }
2964
2965 return p;
2966 }
2967
2968 /*
2969 * memdup with a talloc.
2970 * - returns NULL if size is zero.
2971 */
2972
2973 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
2974 {
2975 void *newp;
2976
2977 if (size == 0) {
2978 return NULL;
2979 }
2980
2981 newp = talloc_named_const(t, size, name);
2982 if (newp) {
2983 memcpy(newp, p, size);
2984 }
2985
2986 return newp;
2987 }
2988
2989 /*
2990 * alloc an array, checking for integer overflow in the array size.
2991 * - returns NULL if count or el_size are zero.
2992 */
2993
2994 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2995 {
2996 if (count >= MAX_TALLOC_SIZE/el_size) {
2997 return NULL;
2998 }
2999
3000 if (el_size == 0 || count == 0) {
3001 return NULL;
3002 }
3003
3004 return talloc_named_const(ctx, el_size * count, name);
3005 }
3006
3007 /*
3008 * alloc an zero array, checking for integer overflow in the array size
3009 * - returns NULL if count or el_size are zero.
3010 */
3011
3012 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3013 {
3014 if (count >= MAX_TALLOC_SIZE/el_size) {
3015 return NULL;
3016 }
3017
3018 if (el_size == 0 || count == 0) {
3019 return NULL;
3020 }
3021
3022 return _talloc_zero(ctx, el_size * count, name);
3023 }
3024
3025 /*
3026 * Talloc wrapper that returns NULL if size == 0.
3027 */
3028 void *talloc_zeronull(const void *context, size_t size, const char *name)
3029 {
3030 if (size == 0) {
3031 return NULL;
3032 }
3033 return talloc_named_const(context, size, name);
3034 }
3035 #endif
3036
3037 bool is_valid_policy_hnd(const struct policy_handle *hnd)
3038 {
3039 struct policy_handle tmp;
3040 ZERO_STRUCT(tmp);
3041 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
3042 }
3043
3044 bool policy_hnd_equal(const struct policy_handle *hnd1,
3045 const struct policy_handle *hnd2)
3046 {
3047 if (!hnd1 || !hnd2) {
3048 return false;
3049 }
3050
3051 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
3052 }
3053
3054 /****************************************************************
3055 strip off leading '\\' from a hostname
3056 ****************************************************************/
3057
3058 const char *strip_hostname(const char *s)
3059 {
3060 if (!s) {
3061 return NULL;
3062 }
3063
3064 if (strlen_m(s) < 3) {
3065 return s;
3066 }
3067
3068 if (s[0] == '\\') s++;
3069 if (s[0] == '\\') s++;
3070
3071 return s;
3072 }
Crístian's Samba branch