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Make error message clearer on fail.
[Samba.git] / source3 / lib / util.c
blob75fd82709a881a3b98983f50d708ef88093e9036
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_password(const struct user_auth_info *auth_info)
312 {
313 if (!auth_info->password) {
314 return "";
315 }
316 return auth_info->password;
317 }
318
319 void set_cmdline_auth_info_password(struct user_auth_info *auth_info,
320 const char *password)
321 {
322 TALLOC_FREE(auth_info->password);
323 if (password == NULL) {
324 password = "";
325 }
326 auth_info->password = talloc_strdup(auth_info, password);
327 if (!auth_info->password) {
328 exit(ENOMEM);
329 }
330 auth_info->got_pass = true;
331 }
332
333 bool set_cmdline_auth_info_signing_state(struct user_auth_info *auth_info,
334 const char *arg)
335 {
336 auth_info->signing_state = -1;
337 if (strequal(arg, "off") || strequal(arg, "no") ||
338 strequal(arg, "false")) {
339 auth_info->signing_state = false;
340 } else if (strequal(arg, "on") || strequal(arg, "yes") ||
341 strequal(arg, "true") || strequal(arg, "auto")) {
342 auth_info->signing_state = true;
343 } else if (strequal(arg, "force") || strequal(arg, "required") ||
344 strequal(arg, "forced")) {
345 auth_info->signing_state = Required;
346 } else {
347 return false;
348 }
349 return true;
350 }
351
352 int get_cmdline_auth_info_signing_state(const struct user_auth_info *auth_info)
353 {
354 return auth_info->signing_state;
355 }
356
357 void set_cmdline_auth_info_use_kerberos(struct user_auth_info *auth_info,
358 bool b)
359 {
360 auth_info->use_kerberos = b;
361 }
362
363 bool get_cmdline_auth_info_use_kerberos(const struct user_auth_info *auth_info)
364 {
365 return auth_info->use_kerberos;
366 }
367
368 void set_cmdline_auth_info_fallback_after_kerberos(struct user_auth_info *auth_info,
369 bool b)
370 {
371 auth_info->fallback_after_kerberos = b;
372 }
373
374 bool get_cmdline_auth_info_fallback_after_kerberos(const struct user_auth_info *auth_info)
375 {
376 return auth_info->fallback_after_kerberos;
377 }
378
379 /* This should only be used by lib/popt_common.c JRA */
380 void set_cmdline_auth_info_use_krb5_ticket(struct user_auth_info *auth_info)
381 {
382 auth_info->use_kerberos = true;
383 auth_info->got_pass = true;
384 }
385
386 /* This should only be used by lib/popt_common.c JRA */
387 void set_cmdline_auth_info_smb_encrypt(struct user_auth_info *auth_info)
388 {
389 auth_info->smb_encrypt = true;
390 }
391
392 void set_cmdline_auth_info_use_machine_account(struct user_auth_info *auth_info)
393 {
394 auth_info->use_machine_account = true;
395 }
396
397 bool get_cmdline_auth_info_got_pass(const struct user_auth_info *auth_info)
398 {
399 return auth_info->got_pass;
400 }
401
402 bool get_cmdline_auth_info_smb_encrypt(const struct user_auth_info *auth_info)
403 {
404 return auth_info->smb_encrypt;
405 }
406
407 bool get_cmdline_auth_info_use_machine_account(const struct user_auth_info *auth_info)
408 {
409 return auth_info->use_machine_account;
410 }
411
412 struct user_auth_info *get_cmdline_auth_info_copy(TALLOC_CTX *mem_ctx,
413 const struct user_auth_info *src)
414 {
415 struct user_auth_info *result;
416
417 result = user_auth_info_init(mem_ctx);
418 if (result == NULL) {
419 return NULL;
420 }
421
422 *result = *src;
423
424 result->username = talloc_strdup(
425 result, get_cmdline_auth_info_username(src));
426 result->password = talloc_strdup(
427 result, get_cmdline_auth_info_password(src));
428 if ((result->username == NULL) || (result->password == NULL)) {
429 TALLOC_FREE(result);
430 return NULL;
431 }
432
433 return result;
434 }
435
436 bool set_cmdline_auth_info_machine_account_creds(struct user_auth_info *auth_info)
437 {
438 char *pass = NULL;
439 char *account = NULL;
440
441 if (!get_cmdline_auth_info_use_machine_account(auth_info)) {
442 return false;
443 }
444
445 if (!secrets_init()) {
446 d_printf("ERROR: Unable to open secrets database\n");
447 return false;
448 }
449
450 if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
451 return false;
452 }
453
454 pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
455 if (!pass) {
456 d_printf("ERROR: Unable to fetch machine password for "
457 "%s in domain %s\n",
458 account, lp_workgroup());
459 SAFE_FREE(account);
460 return false;
461 }
462
463 set_cmdline_auth_info_username(auth_info, account);
464 set_cmdline_auth_info_password(auth_info, pass);
465
466 SAFE_FREE(account);
467 SAFE_FREE(pass);
468
469 return true;
470 }
471
472 /****************************************************************************
473 Ensure we have a password if one not given.
474 ****************************************************************************/
475
476 void set_cmdline_auth_info_getpass(struct user_auth_info *auth_info)
477 {
478 char *label = NULL;
479 char *pass;
480 TALLOC_CTX *frame;
481
482 if (get_cmdline_auth_info_got_pass(auth_info) ||
483 get_cmdline_auth_info_use_kerberos(auth_info)) {
484 /* Already got one... */
485 return;
486 }
487
488 frame = talloc_stackframe();
489 label = talloc_asprintf(frame, "Enter %s's password: ",
490 get_cmdline_auth_info_username(auth_info));
491 pass = getpass(label);
492 if (pass) {
493 set_cmdline_auth_info_password(auth_info, pass);
494 }
495 TALLOC_FREE(frame);
496 }
497
498 /****************************************************************************
499 Add a gid to an array of gids if it's not already there.
500 ****************************************************************************/
501
502 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
503 gid_t **gids, size_t *num_gids)
504 {
505 int i;
506
507 if ((*num_gids != 0) && (*gids == NULL)) {
508 /*
509 * A former call to this routine has failed to allocate memory
510 */
511 return False;
512 }
513
514 for (i=0; i<*num_gids; i++) {
515 if ((*gids)[i] == gid) {
516 return True;
517 }
518 }
519
520 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
521 if (*gids == NULL) {
522 *num_gids = 0;
523 return False;
524 }
525
526 (*gids)[*num_gids] = gid;
527 *num_gids += 1;
528 return True;
529 }
530
531 /*******************************************************************
532 Check if a file exists - call vfs_file_exist for samba files.
533 ********************************************************************/
534
535 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf)
536 {
537 SMB_STRUCT_STAT st;
538 if (!sbuf)
539 sbuf = &st;
540
541 if (sys_stat(fname,sbuf) != 0)
542 return(False);
543
544 return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
545 }
546
547 /*******************************************************************
548 Check if a unix domain socket exists - call vfs_file_exist for samba files.
549 ********************************************************************/
550
551 bool socket_exist(const char *fname)
552 {
553 SMB_STRUCT_STAT st;
554 if (sys_stat(fname,&st) != 0)
555 return(False);
556
557 return S_ISSOCK(st.st_mode);
558 }
559
560 /*******************************************************************
561 Check if a directory exists.
562 ********************************************************************/
563
564 bool directory_exist_stat(char *dname,SMB_STRUCT_STAT *st)
565 {
566 SMB_STRUCT_STAT st2;
567 bool ret;
568
569 if (!st)
570 st = &st2;
571
572 if (sys_stat(dname,st) != 0)
573 return(False);
574
575 ret = S_ISDIR(st->st_mode);
576 if(!ret)
577 errno = ENOTDIR;
578 return ret;
579 }
580
581 /*******************************************************************
582 Returns the size in bytes of the named given the stat struct.
583 ********************************************************************/
584
585 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
586 {
587 return sbuf->st_size;
588 }
589
590 /*******************************************************************
591 Returns the size in bytes of the named file.
592 ********************************************************************/
593
594 SMB_OFF_T get_file_size(char *file_name)
595 {
596 SMB_STRUCT_STAT buf;
597 buf.st_size = 0;
598 if(sys_stat(file_name,&buf) != 0)
599 return (SMB_OFF_T)-1;
600 return get_file_size_stat(&buf);
601 }
602
603 /*******************************************************************
604 Return a string representing an attribute for a file.
605 ********************************************************************/
606
607 char *attrib_string(uint16 mode)
608 {
609 fstring attrstr;
610
611 attrstr[0] = 0;
612
613 if (mode & aVOLID) fstrcat(attrstr,"V");
614 if (mode & aDIR) fstrcat(attrstr,"D");
615 if (mode & aARCH) fstrcat(attrstr,"A");
616 if (mode & aHIDDEN) fstrcat(attrstr,"H");
617 if (mode & aSYSTEM) fstrcat(attrstr,"S");
618 if (mode & aRONLY) fstrcat(attrstr,"R");
619
620 return talloc_strdup(talloc_tos(), attrstr);
621 }
622
623 /*******************************************************************
624 Show a smb message structure.
625 ********************************************************************/
626
627 void show_msg(char *buf)
628 {
629 int i;
630 int bcc=0;
631
632 if (!DEBUGLVL(5))
633 return;
634
635 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
636 smb_len(buf),
637 (int)CVAL(buf,smb_com),
638 (int)CVAL(buf,smb_rcls),
639 (int)CVAL(buf,smb_reh),
640 (int)SVAL(buf,smb_err),
641 (int)CVAL(buf,smb_flg),
642 (int)SVAL(buf,smb_flg2)));
643 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
644 (int)SVAL(buf,smb_tid),
645 (int)SVAL(buf,smb_pid),
646 (int)SVAL(buf,smb_uid),
647 (int)SVAL(buf,smb_mid)));
648 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
649
650 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
651 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
652 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
653
654 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
655
656 DEBUGADD(5,("smb_bcc=%d\n",bcc));
657
658 if (DEBUGLEVEL < 10)
659 return;
660
661 if (DEBUGLEVEL < 50)
662 bcc = MIN(bcc, 512);
663
664 dump_data(10, (uint8 *)smb_buf(buf), bcc);
665 }
666
667 /*******************************************************************
668 Set the length and marker of an encrypted smb packet.
669 ********************************************************************/
670
671 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
672 {
673 _smb_setlen(buf,len);
674
675 SCVAL(buf,4,0xFF);
676 SCVAL(buf,5,'E');
677 SSVAL(buf,6,enc_ctx_num);
678 }
679
680 /*******************************************************************
681 Set the length and marker of an smb packet.
682 ********************************************************************/
683
684 void smb_setlen(char *buf,int len)
685 {
686 _smb_setlen(buf,len);
687
688 SCVAL(buf,4,0xFF);
689 SCVAL(buf,5,'S');
690 SCVAL(buf,6,'M');
691 SCVAL(buf,7,'B');
692 }
693
694 /*******************************************************************
695 Setup only the byte count for a smb message.
696 ********************************************************************/
697
698 int set_message_bcc(char *buf,int num_bytes)
699 {
700 int num_words = CVAL(buf,smb_wct);
701 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
702 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
703 return (smb_size + num_words*2 + num_bytes);
704 }
705
706 /*******************************************************************
707 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
708 Return the bytes added
709 ********************************************************************/
710
711 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
712 {
713 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
714 uint8 *tmp;
715
716 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
717 DEBUG(0, ("talloc failed\n"));
718 return -1;
719 }
720 *outbuf = tmp;
721
722 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
723 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
724 return blob.length;
725 }
726
727 /*******************************************************************
728 Reduce a file name, removing .. elements.
729 ********************************************************************/
730
731 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
732 {
733 char *p = NULL;
734 char *str = NULL;
735
736 DEBUG(3,("dos_clean_name [%s]\n",s));
737
738 /* remove any double slashes */
739 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
740 if (!str) {
741 return NULL;
742 }
743
744 /* Remove leading .\\ characters */
745 if(strncmp(str, ".\\", 2) == 0) {
746 trim_string(str, ".\\", NULL);
747 if(*str == 0) {
748 str = talloc_strdup(ctx, ".\\");
749 if (!str) {
750 return NULL;
751 }
752 }
753 }
754
755 while ((p = strstr_m(str,"\\..\\")) != NULL) {
756 char *s1;
757
758 *p = 0;
759 s1 = p+3;
760
761 if ((p=strrchr_m(str,'\\')) != NULL) {
762 *p = 0;
763 } else {
764 *str = 0;
765 }
766 str = talloc_asprintf(ctx,
767 "%s%s",
768 str,
769 s1);
770 if (!str) {
771 return NULL;
772 }
773 }
774
775 trim_string(str,NULL,"\\..");
776 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
777 }
778
779 /*******************************************************************
780 Reduce a file name, removing .. elements.
781 ********************************************************************/
782
783 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
784 {
785 char *p = NULL;
786 char *str = NULL;
787
788 DEBUG(3,("unix_clean_name [%s]\n",s));
789
790 /* remove any double slashes */
791 str = talloc_all_string_sub(ctx, s, "//","/");
792 if (!str) {
793 return NULL;
794 }
795
796 /* Remove leading ./ characters */
797 if(strncmp(str, "./", 2) == 0) {
798 trim_string(str, "./", NULL);
799 if(*str == 0) {
800 str = talloc_strdup(ctx, "./");
801 if (!str) {
802 return NULL;
803 }
804 }
805 }
806
807 while ((p = strstr_m(str,"/../")) != NULL) {
808 char *s1;
809
810 *p = 0;
811 s1 = p+3;
812
813 if ((p=strrchr_m(str,'/')) != NULL) {
814 *p = 0;
815 } else {
816 *str = 0;
817 }
818 str = talloc_asprintf(ctx,
819 "%s%s",
820 str,
821 s1);
822 if (!str) {
823 return NULL;
824 }
825 }
826
827 trim_string(str,NULL,"/..");
828 return talloc_all_string_sub(ctx, str, "/./", "/");
829 }
830
831 char *clean_name(TALLOC_CTX *ctx, const char *s)
832 {
833 char *str = dos_clean_name(ctx, s);
834 if (!str) {
835 return NULL;
836 }
837 return unix_clean_name(ctx, str);
838 }
839
840 /*******************************************************************
841 Write data into an fd at a given offset. Ignore seek errors.
842 ********************************************************************/
843
844 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
845 {
846 size_t total=0;
847 ssize_t ret;
848
849 if (pos == (SMB_OFF_T)-1) {
850 return write_data(fd, buffer, N);
851 }
852 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
853 while (total < N) {
854 ret = sys_pwrite(fd,buffer + total,N - total, pos);
855 if (ret == -1 && errno == ESPIPE) {
856 return write_data(fd, buffer + total,N - total);
857 }
858 if (ret == -1) {
859 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
860 return -1;
861 }
862 if (ret == 0) {
863 return total;
864 }
865 total += ret;
866 pos += ret;
867 }
868 return (ssize_t)total;
869 #else
870 /* Use lseek and write_data. */
871 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
872 if (errno != ESPIPE) {
873 return -1;
874 }
875 }
876 return write_data(fd, buffer, N);
877 #endif
878 }
879
880 /*******************************************************************
881 Sleep for a specified number of milliseconds.
882 ********************************************************************/
883
884 void smb_msleep(unsigned int t)
885 {
886 #if defined(HAVE_NANOSLEEP)
887 struct timespec tval;
888 int ret;
889
890 tval.tv_sec = t/1000;
891 tval.tv_nsec = 1000000*(t%1000);
892
893 do {
894 errno = 0;
895 ret = nanosleep(&tval, &tval);
896 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
897 #else
898 unsigned int tdiff=0;
899 struct timeval tval,t1,t2;
900 fd_set fds;
901
902 GetTimeOfDay(&t1);
903 t2 = t1;
904
905 while (tdiff < t) {
906 tval.tv_sec = (t-tdiff)/1000;
907 tval.tv_usec = 1000*((t-tdiff)%1000);
908
909 /* Never wait for more than 1 sec. */
910 if (tval.tv_sec > 1) {
911 tval.tv_sec = 1;
912 tval.tv_usec = 0;
913 }
914
915 FD_ZERO(&fds);
916 errno = 0;
917 sys_select_intr(0,&fds,NULL,NULL,&tval);
918
919 GetTimeOfDay(&t2);
920 if (t2.tv_sec < t1.tv_sec) {
921 /* Someone adjusted time... */
922 t1 = t2;
923 }
924
925 tdiff = TvalDiff(&t1,&t2);
926 }
927 #endif
928 }
929
930 bool reinit_after_fork(struct messaging_context *msg_ctx,
931 struct event_context *ev_ctx,
932 bool parent_longlived)
933 {
934 NTSTATUS status;
935
936 /* Reset the state of the random
937 * number generation system, so
938 * children do not get the same random
939 * numbers as each other */
940 set_need_random_reseed();
941
942 /* tdb needs special fork handling */
943 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
944 DEBUG(0,("tdb_reopen_all failed.\n"));
945 return false;
946 }
947
948 if (ev_ctx) {
949 event_context_reinit(ev_ctx);
950 }
951
952 if (msg_ctx) {
953 /*
954 * For clustering, we need to re-init our ctdbd connection after the
955 * fork
956 */
957 status = messaging_reinit(msg_ctx);
958 if (!NT_STATUS_IS_OK(status)) {
959 DEBUG(0,("messaging_reinit() failed: %s\n",
960 nt_errstr(status)));
961 return false;
962 }
963 }
964
965 return true;
966 }
967
968 /****************************************************************************
969 Put up a yes/no prompt.
970 ****************************************************************************/
971
972 bool yesno(const char *p)
973 {
974 char ans[20];
975 printf("%s",p);
976
977 if (!fgets(ans,sizeof(ans)-1,stdin))
978 return(False);
979
980 if (*ans == 'y' || *ans == 'Y')
981 return(True);
982
983 return(False);
984 }
985
986 #if defined(PARANOID_MALLOC_CHECKER)
987
988 /****************************************************************************
989 Internal malloc wrapper. Externally visible.
990 ****************************************************************************/
991
992 void *malloc_(size_t size)
993 {
994 if (size == 0) {
995 return NULL;
996 }
997 #undef malloc
998 return malloc(size);
999 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
1000 }
1001
1002 /****************************************************************************
1003 Internal calloc wrapper. Not externally visible.
1004 ****************************************************************************/
1005
1006 static void *calloc_(size_t count, size_t size)
1007 {
1008 if (size == 0 || count == 0) {
1009 return NULL;
1010 }
1011 #undef calloc
1012 return calloc(count, size);
1013 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
1014 }
1015
1016 /****************************************************************************
1017 Internal realloc wrapper. Not externally visible.
1018 ****************************************************************************/
1019
1020 static void *realloc_(void *ptr, size_t size)
1021 {
1022 #undef realloc
1023 return realloc(ptr, size);
1024 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
1025 }
1026
1027 #endif /* PARANOID_MALLOC_CHECKER */
1028
1029 /****************************************************************************
1030 Type-safe memalign
1031 ****************************************************************************/
1032
1033 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1034 {
1035 if (count >= MAX_ALLOC_SIZE/el_size) {
1036 return NULL;
1037 }
1038
1039 return sys_memalign(align, el_size*count);
1040 }
1041
1042 /****************************************************************************
1043 Type-safe calloc.
1044 ****************************************************************************/
1045
1046 void *calloc_array(size_t size, size_t nmemb)
1047 {
1048 if (nmemb >= MAX_ALLOC_SIZE/size) {
1049 return NULL;
1050 }
1051 if (size == 0 || nmemb == 0) {
1052 return NULL;
1053 }
1054 #if defined(PARANOID_MALLOC_CHECKER)
1055 return calloc_(nmemb, size);
1056 #else
1057 return calloc(nmemb, size);
1058 #endif
1059 }
1060
1061 /****************************************************************************
1062 Expand a pointer to be a particular size.
1063 Note that this version of Realloc has an extra parameter that decides
1064 whether to free the passed in storage on allocation failure or if the
1065 new size is zero.
1066
1067 This is designed for use in the typical idiom of :
1068
1069 p = SMB_REALLOC(p, size)
1070 if (!p) {
1071 return error;
1072 }
1073
1074 and not to have to keep track of the old 'p' contents to free later, nor
1075 to worry if the size parameter was zero. In the case where NULL is returned
1076 we guarentee that p has been freed.
1077
1078 If free later semantics are desired, then pass 'free_old_on_error' as False which
1079 guarentees that the old contents are not freed on error, even if size == 0. To use
1080 this idiom use :
1081
1082 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1083 if (!tmp) {
1084 SAFE_FREE(p);
1085 return error;
1086 } else {
1087 p = tmp;
1088 }
1089
1090 Changes were instigated by Coverity error checking. JRA.
1091 ****************************************************************************/
1092
1093 void *Realloc(void *p, size_t size, bool free_old_on_error)
1094 {
1095 void *ret=NULL;
1096
1097 if (size == 0) {
1098 if (free_old_on_error) {
1099 SAFE_FREE(p);
1100 }
1101 DEBUG(2,("Realloc asked for 0 bytes\n"));
1102 return NULL;
1103 }
1104
1105 #if defined(PARANOID_MALLOC_CHECKER)
1106 if (!p) {
1107 ret = (void *)malloc_(size);
1108 } else {
1109 ret = (void *)realloc_(p,size);
1110 }
1111 #else
1112 if (!p) {
1113 ret = (void *)malloc(size);
1114 } else {
1115 ret = (void *)realloc(p,size);
1116 }
1117 #endif
1118
1119 if (!ret) {
1120 if (free_old_on_error && p) {
1121 SAFE_FREE(p);
1122 }
1123 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1124 }
1125
1126 return(ret);
1127 }
1128
1129 /****************************************************************************
1130 (Hopefully) efficient array append.
1131 ****************************************************************************/
1132
1133 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1134 void *element, void *_array, uint32 *num_elements,
1135 ssize_t *array_size)
1136 {
1137 void **array = (void **)_array;
1138
1139 if (*array_size < 0) {
1140 return;
1141 }
1142
1143 if (*array == NULL) {
1144 if (*array_size == 0) {
1145 *array_size = 128;
1146 }
1147
1148 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1149 goto error;
1150 }
1151
1152 *array = TALLOC(mem_ctx, element_size * (*array_size));
1153 if (*array == NULL) {
1154 goto error;
1155 }
1156 }
1157
1158 if (*num_elements == *array_size) {
1159 *array_size *= 2;
1160
1161 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1162 goto error;
1163 }
1164
1165 *array = TALLOC_REALLOC(mem_ctx, *array,
1166 element_size * (*array_size));
1167
1168 if (*array == NULL) {
1169 goto error;
1170 }
1171 }
1172
1173 memcpy((char *)(*array) + element_size*(*num_elements),
1174 element, element_size);
1175 *num_elements += 1;
1176
1177 return;
1178
1179 error:
1180 *num_elements = 0;
1181 *array_size = -1;
1182 }
1183
1184 /****************************************************************************
1185 Get my own domain name, or "" if we have none.
1186 ****************************************************************************/
1187
1188 char *get_mydnsdomname(TALLOC_CTX *ctx)
1189 {
1190 const char *domname;
1191 char *p;
1192
1193 domname = get_mydnsfullname();
1194 if (!domname) {
1195 return NULL;
1196 }
1197
1198 p = strchr_m(domname, '.');
1199 if (p) {
1200 p++;
1201 return talloc_strdup(ctx, p);
1202 } else {
1203 return talloc_strdup(ctx, "");
1204 }
1205 }
1206
1207 /****************************************************************************
1208 Interpret a protocol description string, with a default.
1209 ****************************************************************************/
1210
1211 int interpret_protocol(const char *str,int def)
1212 {
1213 if (strequal(str,"NT1"))
1214 return(PROTOCOL_NT1);
1215 if (strequal(str,"LANMAN2"))
1216 return(PROTOCOL_LANMAN2);
1217 if (strequal(str,"LANMAN1"))
1218 return(PROTOCOL_LANMAN1);
1219 if (strequal(str,"CORE"))
1220 return(PROTOCOL_CORE);
1221 if (strequal(str,"COREPLUS"))
1222 return(PROTOCOL_COREPLUS);
1223 if (strequal(str,"CORE+"))
1224 return(PROTOCOL_COREPLUS);
1225
1226 DEBUG(0,("Unrecognised protocol level %s\n",str));
1227
1228 return(def);
1229 }
1230
1231
1232 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1233 /******************************************************************
1234 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1235 Based on a fix from <Thomas.Hepper@icem.de>.
1236 Returns a malloc'ed string.
1237 *******************************************************************/
1238
1239 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1240 {
1241 if (*str == '-') {
1242 const char *p = str;
1243 while(*p && !isspace(*p))
1244 p++;
1245 while(*p && isspace(*p))
1246 p++;
1247 if(*p) {
1248 return talloc_strdup(ctx, p);
1249 }
1250 }
1251 return NULL;
1252 }
1253
1254 /*******************************************************************
1255 Patch from jkf@soton.ac.uk
1256 Split Luke's automount_server into YP lookup and string splitter
1257 so can easily implement automount_path().
1258 Returns a malloc'ed string.
1259 *******************************************************************/
1260
1261 #ifdef WITH_NISPLUS_HOME
1262 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1263 {
1264 char *value = NULL;
1265
1266 char *nis_map = (char *)lp_nis_home_map_name();
1267
1268 char buffer[NIS_MAXATTRVAL + 1];
1269 nis_result *result;
1270 nis_object *object;
1271 entry_obj *entry;
1272
1273 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1274 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1275
1276 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1277 if (result->status != NIS_SUCCESS) {
1278 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1279 } else {
1280 object = result->objects.objects_val;
1281 if (object->zo_data.zo_type == ENTRY_OBJ) {
1282 entry = &object->zo_data.objdata_u.en_data;
1283 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1284 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1285
1286 value = talloc_strdup(ctx,
1287 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1288 if (!value) {
1289 nis_freeresult(result);
1290 return NULL;
1291 }
1292 value = talloc_string_sub(ctx,
1293 value,
1294 "&",
1295 user_name);
1296 }
1297 }
1298 }
1299 nis_freeresult(result);
1300
1301 if (value) {
1302 value = strip_mount_options(ctx, value);
1303 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1304 user_name, value));
1305 }
1306 return value;
1307 }
1308 #else /* WITH_NISPLUS_HOME */
1309
1310 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1311 {
1312 char *value = NULL;
1313
1314 int nis_error; /* returned by yp all functions */
1315 char *nis_result; /* yp_match inits this */
1316 int nis_result_len; /* and set this */
1317 char *nis_domain; /* yp_get_default_domain inits this */
1318 char *nis_map = (char *)lp_nis_home_map_name();
1319
1320 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1321 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1322 return NULL;
1323 }
1324
1325 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1326
1327 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1328 strlen(user_name), &nis_result,
1329 &nis_result_len)) == 0) {
1330 value = talloc_strdup(ctx, nis_result);
1331 if (!value) {
1332 return NULL;
1333 }
1334 value = strip_mount_options(ctx, value);
1335 } else if(nis_error == YPERR_KEY) {
1336 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1337 user_name, nis_map));
1338 DEBUG(3, ("using defaults for server and home directory\n"));
1339 } else {
1340 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1341 yperr_string(nis_error), user_name, nis_map));
1342 }
1343
1344 if (value) {
1345 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1346 }
1347 return value;
1348 }
1349 #endif /* WITH_NISPLUS_HOME */
1350 #endif
1351
1352 /****************************************************************************
1353 Check if a process exists. Does this work on all unixes?
1354 ****************************************************************************/
1355
1356 bool process_exists(const struct server_id pid)
1357 {
1358 if (procid_is_me(&pid)) {
1359 return True;
1360 }
1361
1362 if (procid_is_local(&pid)) {
1363 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1364 }
1365
1366 #ifdef CLUSTER_SUPPORT
1367 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1368 pid.pid);
1369 #else
1370 return False;
1371 #endif
1372 }
1373
1374 /*******************************************************************
1375 Convert a uid into a user name.
1376 ********************************************************************/
1377
1378 const char *uidtoname(uid_t uid)
1379 {
1380 TALLOC_CTX *ctx = talloc_tos();
1381 char *name = NULL;
1382 struct passwd *pass = NULL;
1383
1384 pass = getpwuid_alloc(ctx,uid);
1385 if (pass) {
1386 name = talloc_strdup(ctx,pass->pw_name);
1387 TALLOC_FREE(pass);
1388 } else {
1389 name = talloc_asprintf(ctx,
1390 "%ld",
1391 (long int)uid);
1392 }
1393 return name;
1394 }
1395
1396 /*******************************************************************
1397 Convert a gid into a group name.
1398 ********************************************************************/
1399
1400 char *gidtoname(gid_t gid)
1401 {
1402 struct group *grp;
1403
1404 grp = getgrgid(gid);
1405 if (grp) {
1406 return talloc_strdup(talloc_tos(), grp->gr_name);
1407 }
1408 else {
1409 return talloc_asprintf(talloc_tos(),
1410 "%d",
1411 (int)gid);
1412 }
1413 }
1414
1415 /*******************************************************************
1416 Convert a user name into a uid.
1417 ********************************************************************/
1418
1419 uid_t nametouid(const char *name)
1420 {
1421 struct passwd *pass;
1422 char *p;
1423 uid_t u;
1424
1425 pass = getpwnam_alloc(talloc_autofree_context(), name);
1426 if (pass) {
1427 u = pass->pw_uid;
1428 TALLOC_FREE(pass);
1429 return u;
1430 }
1431
1432 u = (uid_t)strtol(name, &p, 0);
1433 if ((p != name) && (*p == '\0'))
1434 return u;
1435
1436 return (uid_t)-1;
1437 }
1438
1439 /*******************************************************************
1440 Convert a name to a gid_t if possible. Return -1 if not a group.
1441 ********************************************************************/
1442
1443 gid_t nametogid(const char *name)
1444 {
1445 struct group *grp;
1446 char *p;
1447 gid_t g;
1448
1449 g = (gid_t)strtol(name, &p, 0);
1450 if ((p != name) && (*p == '\0'))
1451 return g;
1452
1453 grp = sys_getgrnam(name);
1454 if (grp)
1455 return(grp->gr_gid);
1456 return (gid_t)-1;
1457 }
1458
1459 /*******************************************************************
1460 Something really nasty happened - panic !
1461 ********************************************************************/
1462
1463 void smb_panic(const char *const why)
1464 {
1465 char *cmd;
1466 int result;
1467
1468 #ifdef DEVELOPER
1469 {
1470
1471 if (global_clobber_region_function) {
1472 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1473 global_clobber_region_function,
1474 global_clobber_region_line));
1475 }
1476 }
1477 #endif
1478
1479 DEBUG(0,("PANIC (pid %llu): %s\n",
1480 (unsigned long long)sys_getpid(), why));
1481 log_stack_trace();
1482
1483 cmd = lp_panic_action();
1484 if (cmd && *cmd) {
1485 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1486 result = system(cmd);
1487
1488 if (result == -1)
1489 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1490 strerror(errno)));
1491 else
1492 DEBUG(0, ("smb_panic(): action returned status %d\n",
1493 WEXITSTATUS(result)));
1494 }
1495
1496 dump_core();
1497 }
1498
1499 /*******************************************************************
1500 Print a backtrace of the stack to the debug log. This function
1501 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1502 exit shortly after calling it.
1503 ********************************************************************/
1504
1505 #ifdef HAVE_LIBUNWIND_H
1506 #include <libunwind.h>
1507 #endif
1508
1509 #ifdef HAVE_EXECINFO_H
1510 #include <execinfo.h>
1511 #endif
1512
1513 #ifdef HAVE_LIBEXC_H
1514 #include <libexc.h>
1515 #endif
1516
1517 void log_stack_trace(void)
1518 {
1519 #ifdef HAVE_LIBUNWIND
1520 /* Try to use libunwind before any other technique since on ia64
1521 * libunwind correctly walks the stack in more circumstances than
1522 * backtrace.
1523 */
1524 unw_cursor_t cursor;
1525 unw_context_t uc;
1526 unsigned i = 0;
1527
1528 char procname[256];
1529 unw_word_t ip, sp, off;
1530
1531 procname[sizeof(procname) - 1] = '\0';
1532
1533 if (unw_getcontext(&uc) != 0) {
1534 goto libunwind_failed;
1535 }
1536
1537 if (unw_init_local(&cursor, &uc) != 0) {
1538 goto libunwind_failed;
1539 }
1540
1541 DEBUG(0, ("BACKTRACE:\n"));
1542
1543 do {
1544 ip = sp = 0;
1545 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1546 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1547
1548 switch (unw_get_proc_name(&cursor,
1549 procname, sizeof(procname) - 1, &off) ) {
1550 case 0:
1551 /* Name found. */
1552 case -UNW_ENOMEM:
1553 /* Name truncated. */
1554 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1555 i, procname, (long long)off,
1556 (long long)ip, (long long) sp));
1557 break;
1558 default:
1559 /* case -UNW_ENOINFO: */
1560 /* case -UNW_EUNSPEC: */
1561 /* No symbol name found. */
1562 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1563 i, "<unknown symbol>",
1564 (long long)ip, (long long) sp));
1565 }
1566 ++i;
1567 } while (unw_step(&cursor) > 0);
1568
1569 return;
1570
1571 libunwind_failed:
1572 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1573
1574 #elif HAVE_BACKTRACE_SYMBOLS
1575 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1576 size_t backtrace_size;
1577 char **backtrace_strings;
1578
1579 /* get the backtrace (stack frames) */
1580 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1581 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1582
1583 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1584 (unsigned long)backtrace_size));
1585
1586 if (backtrace_strings) {
1587 int i;
1588
1589 for (i = 0; i < backtrace_size; i++)
1590 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1591
1592 /* Leak the backtrace_strings, rather than risk what free() might do */
1593 }
1594
1595 #elif HAVE_LIBEXC
1596
1597 /* The IRIX libexc library provides an API for unwinding the stack. See
1598 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1599 * since we are about to abort anyway, it hardly matters.
1600 */
1601
1602 #define NAMESIZE 32 /* Arbitrary */
1603
1604 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1605 char * names[BACKTRACE_STACK_SIZE];
1606 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1607
1608 int i;
1609 int levels;
1610
1611 ZERO_ARRAY(addrs);
1612 ZERO_ARRAY(names);
1613 ZERO_ARRAY(namebuf);
1614
1615 /* We need to be root so we can open our /proc entry to walk
1616 * our stack. It also helps when we want to dump core.
1617 */
1618 become_root();
1619
1620 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1621 names[i] = namebuf + (i * NAMESIZE);
1622 }
1623
1624 levels = trace_back_stack(0, addrs, names,
1625 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1626
1627 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1628 for (i = 0; i < levels; i++) {
1629 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1630 }
1631 #undef NAMESIZE
1632
1633 #else
1634 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1635 #endif
1636 }
1637
1638 /*******************************************************************
1639 A readdir wrapper which just returns the file name.
1640 ********************************************************************/
1641
1642 const char *readdirname(SMB_STRUCT_DIR *p)
1643 {
1644 SMB_STRUCT_DIRENT *ptr;
1645 char *dname;
1646
1647 if (!p)
1648 return(NULL);
1649
1650 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1651 if (!ptr)
1652 return(NULL);
1653
1654 dname = ptr->d_name;
1655
1656 #ifdef NEXT2
1657 if (telldir(p) < 0)
1658 return(NULL);
1659 #endif
1660
1661 #ifdef HAVE_BROKEN_READDIR_NAME
1662 /* using /usr/ucb/cc is BAD */
1663 dname = dname - 2;
1664 #endif
1665
1666 return talloc_strdup(talloc_tos(), dname);
1667 }
1668
1669 /*******************************************************************
1670 Utility function used to decide if the last component
1671 of a path matches a (possibly wildcarded) entry in a namelist.
1672 ********************************************************************/
1673
1674 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1675 {
1676 const char *last_component;
1677
1678 /* if we have no list it's obviously not in the path */
1679 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1680 return False;
1681 }
1682
1683 DEBUG(8, ("is_in_path: %s\n", name));
1684
1685 /* Get the last component of the unix name. */
1686 last_component = strrchr_m(name, '/');
1687 if (!last_component) {
1688 last_component = name;
1689 } else {
1690 last_component++; /* Go past '/' */
1691 }
1692
1693 for(; namelist->name != NULL; namelist++) {
1694 if(namelist->is_wild) {
1695 if (mask_match(last_component, namelist->name, case_sensitive)) {
1696 DEBUG(8,("is_in_path: mask match succeeded\n"));
1697 return True;
1698 }
1699 } else {
1700 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1701 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1702 DEBUG(8,("is_in_path: match succeeded\n"));
1703 return True;
1704 }
1705 }
1706 }
1707 DEBUG(8,("is_in_path: match not found\n"));
1708 return False;
1709 }
1710
1711 /*******************************************************************
1712 Strip a '/' separated list into an array of
1713 name_compare_enties structures suitable for
1714 passing to is_in_path(). We do this for
1715 speed so we can pre-parse all the names in the list
1716 and don't do it for each call to is_in_path().
1717 namelist is modified here and is assumed to be
1718 a copy owned by the caller.
1719 We also check if the entry contains a wildcard to
1720 remove a potentially expensive call to mask_match
1721 if possible.
1722 ********************************************************************/
1723
1724 void set_namearray(name_compare_entry **ppname_array, const char *namelist)
1725 {
1726 char *name_end;
1727 const char *nameptr = namelist;
1728 int num_entries = 0;
1729 int i;
1730
1731 (*ppname_array) = NULL;
1732
1733 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1734 return;
1735
1736 /* We need to make two passes over the string. The
1737 first to count the number of elements, the second
1738 to split it.
1739 */
1740
1741 while(*nameptr) {
1742 if ( *nameptr == '/' ) {
1743 /* cope with multiple (useless) /s) */
1744 nameptr++;
1745 continue;
1746 }
1747 /* find the next / */
1748 name_end = strchr_m(nameptr, '/');
1749
1750 /* oops - the last check for a / didn't find one. */
1751 if (name_end == NULL)
1752 break;
1753
1754 /* next segment please */
1755 nameptr = name_end + 1;
1756 num_entries++;
1757 }
1758
1759 if(num_entries == 0)
1760 return;
1761
1762 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1763 DEBUG(0,("set_namearray: malloc fail\n"));
1764 return;
1765 }
1766
1767 /* Now copy out the names */
1768 nameptr = namelist;
1769 i = 0;
1770 while(*nameptr) {
1771 if ( *nameptr == '/' ) {
1772 /* cope with multiple (useless) /s) */
1773 nameptr++;
1774 continue;
1775 }
1776 /* find the next / */
1777 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1778 *name_end = 0;
1779
1780 /* oops - the last check for a / didn't find one. */
1781 if(name_end == NULL)
1782 break;
1783
1784 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1785 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1786 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1787 return;
1788 }
1789
1790 /* next segment please */
1791 nameptr = name_end + 1;
1792 i++;
1793 }
1794
1795 (*ppname_array)[i].name = NULL;
1796
1797 return;
1798 }
1799
1800 /****************************************************************************
1801 Routine to free a namearray.
1802 ****************************************************************************/
1803
1804 void free_namearray(name_compare_entry *name_array)
1805 {
1806 int i;
1807
1808 if(name_array == NULL)
1809 return;
1810
1811 for(i=0; name_array[i].name!=NULL; i++)
1812 SAFE_FREE(name_array[i].name);
1813 SAFE_FREE(name_array);
1814 }
1815
1816 #undef DBGC_CLASS
1817 #define DBGC_CLASS DBGC_LOCKING
1818
1819 /****************************************************************************
1820 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1821 is dealt with in posix.c
1822 Returns True if we have information regarding this lock region (and returns
1823 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1824 ****************************************************************************/
1825
1826 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
1827 {
1828 SMB_STRUCT_FLOCK lock;
1829 int ret;
1830
1831 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1832 fd,(double)*poffset,(double)*pcount,*ptype));
1833
1834 lock.l_type = *ptype;
1835 lock.l_whence = SEEK_SET;
1836 lock.l_start = *poffset;
1837 lock.l_len = *pcount;
1838 lock.l_pid = 0;
1839
1840 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
1841
1842 if (ret == -1) {
1843 int sav = errno;
1844 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1845 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1846 errno = sav;
1847 return False;
1848 }
1849
1850 *ptype = lock.l_type;
1851 *poffset = lock.l_start;
1852 *pcount = lock.l_len;
1853 *ppid = lock.l_pid;
1854
1855 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1856 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1857 return True;
1858 }
1859
1860 #undef DBGC_CLASS
1861 #define DBGC_CLASS DBGC_ALL
1862
1863 /*******************************************************************
1864 Is the name specified one of my netbios names.
1865 Returns true if it is equal, false otherwise.
1866 ********************************************************************/
1867
1868 bool is_myname(const char *s)
1869 {
1870 int n;
1871 bool ret = False;
1872
1873 for (n=0; my_netbios_names(n); n++) {
1874 if (strequal(my_netbios_names(n), s)) {
1875 ret=True;
1876 break;
1877 }
1878 }
1879 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1880 return(ret);
1881 }
1882
1883 /*******************************************************************
1884 Is the name specified our workgroup/domain.
1885 Returns true if it is equal, false otherwise.
1886 ********************************************************************/
1887
1888 bool is_myworkgroup(const char *s)
1889 {
1890 bool ret = False;
1891
1892 if (strequal(s, lp_workgroup())) {
1893 ret=True;
1894 }
1895
1896 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1897 return(ret);
1898 }
1899
1900 /*******************************************************************
1901 we distinguish between 2K and XP by the "Native Lan Manager" string
1902 WinXP => "Windows 2002 5.1"
1903 WinXP 64bit => "Windows XP 5.2"
1904 Win2k => "Windows 2000 5.0"
1905 NT4 => "Windows NT 4.0"
1906 Win9x => "Windows 4.0"
1907 Windows 2003 doesn't set the native lan manager string but
1908 they do set the domain to "Windows 2003 5.2" (probably a bug).
1909 ********************************************************************/
1910
1911 void ra_lanman_string( const char *native_lanman )
1912 {
1913 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1914 set_remote_arch( RA_WINXP );
1915 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1916 set_remote_arch( RA_WINXP64 );
1917 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1918 set_remote_arch( RA_WIN2K3 );
1919 }
1920
1921 static const char *remote_arch_str;
1922
1923 const char *get_remote_arch_str(void)
1924 {
1925 if (!remote_arch_str) {
1926 return "UNKNOWN";
1927 }
1928 return remote_arch_str;
1929 }
1930
1931 /*******************************************************************
1932 Set the horrid remote_arch string based on an enum.
1933 ********************************************************************/
1934
1935 void set_remote_arch(enum remote_arch_types type)
1936 {
1937 ra_type = type;
1938 switch( type ) {
1939 case RA_WFWG:
1940 remote_arch_str = "WfWg";
1941 break;
1942 case RA_OS2:
1943 remote_arch_str = "OS2";
1944 break;
1945 case RA_WIN95:
1946 remote_arch_str = "Win95";
1947 break;
1948 case RA_WINNT:
1949 remote_arch_str = "WinNT";
1950 break;
1951 case RA_WIN2K:
1952 remote_arch_str = "Win2K";
1953 break;
1954 case RA_WINXP:
1955 remote_arch_str = "WinXP";
1956 break;
1957 case RA_WINXP64:
1958 remote_arch_str = "WinXP64";
1959 break;
1960 case RA_WIN2K3:
1961 remote_arch_str = "Win2K3";
1962 break;
1963 case RA_VISTA:
1964 remote_arch_str = "Vista";
1965 break;
1966 case RA_SAMBA:
1967 remote_arch_str = "Samba";
1968 break;
1969 case RA_CIFSFS:
1970 remote_arch_str = "CIFSFS";
1971 break;
1972 default:
1973 ra_type = RA_UNKNOWN;
1974 remote_arch_str = "UNKNOWN";
1975 break;
1976 }
1977
1978 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1979 remote_arch_str));
1980 }
1981
1982 /*******************************************************************
1983 Get the remote_arch type.
1984 ********************************************************************/
1985
1986 enum remote_arch_types get_remote_arch(void)
1987 {
1988 return ra_type;
1989 }
1990
1991 const char *tab_depth(int level, int depth)
1992 {
1993 if( CHECK_DEBUGLVL(level) ) {
1994 dbgtext("%*s", depth*4, "");
1995 }
1996 return "";
1997 }
1998
1999 /*****************************************************************************
2000 Provide a checksum on a string
2001
2002 Input: s - the null-terminated character string for which the checksum
2003 will be calculated.
2004
2005 Output: The checksum value calculated for s.
2006 *****************************************************************************/
2007
2008 int str_checksum(const char *s)
2009 {
2010 int res = 0;
2011 int c;
2012 int i=0;
2013
2014 while(*s) {
2015 c = *s;
2016 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2017 s++;
2018 i++;
2019 }
2020 return(res);
2021 }
2022
2023 /*****************************************************************
2024 Zero a memory area then free it. Used to catch bugs faster.
2025 *****************************************************************/
2026
2027 void zero_free(void *p, size_t size)
2028 {
2029 memset(p, 0, size);
2030 SAFE_FREE(p);
2031 }
2032
2033 /*****************************************************************
2034 Set our open file limit to a requested max and return the limit.
2035 *****************************************************************/
2036
2037 int set_maxfiles(int requested_max)
2038 {
2039 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2040 struct rlimit rlp;
2041 int saved_current_limit;
2042
2043 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2044 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2045 strerror(errno) ));
2046 /* just guess... */
2047 return requested_max;
2048 }
2049
2050 /*
2051 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2052 * account for the extra fd we need
2053 * as well as the log files and standard
2054 * handles etc. Save the limit we want to set in case
2055 * we are running on an OS that doesn't support this limit (AIX)
2056 * which always returns RLIM_INFINITY for rlp.rlim_max.
2057 */
2058
2059 /* Try raising the hard (max) limit to the requested amount. */
2060
2061 #if defined(RLIM_INFINITY)
2062 if (rlp.rlim_max != RLIM_INFINITY) {
2063 int orig_max = rlp.rlim_max;
2064
2065 if ( rlp.rlim_max < requested_max )
2066 rlp.rlim_max = requested_max;
2067
2068 /* This failing is not an error - many systems (Linux) don't
2069 support our default request of 10,000 open files. JRA. */
2070
2071 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2072 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2073 (int)rlp.rlim_max, strerror(errno) ));
2074
2075 /* Set failed - restore original value from get. */
2076 rlp.rlim_max = orig_max;
2077 }
2078 }
2079 #endif
2080
2081 /* Now try setting the soft (current) limit. */
2082
2083 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2084
2085 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2086 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2087 (int)rlp.rlim_cur, strerror(errno) ));
2088 /* just guess... */
2089 return saved_current_limit;
2090 }
2091
2092 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2093 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2094 strerror(errno) ));
2095 /* just guess... */
2096 return saved_current_limit;
2097 }
2098
2099 #if defined(RLIM_INFINITY)
2100 if(rlp.rlim_cur == RLIM_INFINITY)
2101 return saved_current_limit;
2102 #endif
2103
2104 if((int)rlp.rlim_cur > saved_current_limit)
2105 return saved_current_limit;
2106
2107 return rlp.rlim_cur;
2108 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2109 /*
2110 * No way to know - just guess...
2111 */
2112 return requested_max;
2113 #endif
2114 }
2115
2116 /*****************************************************************
2117 Possibly replace mkstemp if it is broken.
2118 *****************************************************************/
2119
2120 int smb_mkstemp(char *name_template)
2121 {
2122 #if HAVE_SECURE_MKSTEMP
2123 return mkstemp(name_template);
2124 #else
2125 /* have a reasonable go at emulating it. Hope that
2126 the system mktemp() isn't completly hopeless */
2127 char *p = mktemp(name_template);
2128 if (!p)
2129 return -1;
2130 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2131 #endif
2132 }
2133
2134 /*****************************************************************
2135 malloc that aborts with smb_panic on fail or zero size.
2136 *****************************************************************/
2137
2138 void *smb_xmalloc_array(size_t size, unsigned int count)
2139 {
2140 void *p;
2141 if (size == 0) {
2142 smb_panic("smb_xmalloc_array: called with zero size");
2143 }
2144 if (count >= MAX_ALLOC_SIZE/size) {
2145 smb_panic("smb_xmalloc_array: alloc size too large");
2146 }
2147 if ((p = SMB_MALLOC(size*count)) == NULL) {
2148 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2149 (unsigned long)size, (unsigned long)count));
2150 smb_panic("smb_xmalloc_array: malloc failed");
2151 }
2152 return p;
2153 }
2154
2155 /*
2156 vasprintf that aborts on malloc fail
2157 */
2158
2159 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2160 {
2161 int n;
2162 va_list ap2;
2163
2164 va_copy(ap2, ap);
2165
2166 n = vasprintf(ptr, format, ap2);
2167 if (n == -1 || ! *ptr) {
2168 smb_panic("smb_xvasprintf: out of memory");
2169 }
2170 va_end(ap2);
2171 return n;
2172 }
2173
2174 /*****************************************************************
2175 Get local hostname and cache result.
2176 *****************************************************************/
2177
2178 char *myhostname(void)
2179 {
2180 static char *ret;
2181 if (ret == NULL) {
2182 /* This is cached forever so
2183 * use talloc_autofree_context() ctx. */
2184 ret = get_myname(talloc_autofree_context());
2185 }
2186 return ret;
2187 }
2188
2189 /**
2190 * @brief Returns an absolute path to a file concatenating the provided
2191 * @a rootpath and @a basename
2192 *
2193 * @param name Filename, relative to @a rootpath
2194 *
2195 * @retval Pointer to a string containing the full path.
2196 **/
2197
2198 static char *xx_path(const char *name, const char *rootpath)
2199 {
2200 char *fname = NULL;
2201
2202 fname = talloc_strdup(talloc_tos(), rootpath);
2203 if (!fname) {
2204 return NULL;
2205 }
2206 trim_string(fname,"","/");
2207
2208 if (!directory_exist(fname)) {
2209 if (!mkdir(fname,0755))
2210 DEBUG(1, ("Unable to create directory %s for file %s. "
2211 "Error was %s\n", fname, name, strerror(errno)));
2212 }
2213
2214 return talloc_asprintf(talloc_tos(),
2215 "%s/%s",
2216 fname,
2217 name);
2218 }
2219
2220 /**
2221 * @brief Returns an absolute path to a file in the Samba lock directory.
2222 *
2223 * @param name File to find, relative to LOCKDIR.
2224 *
2225 * @retval Pointer to a talloc'ed string containing the full path.
2226 **/
2227
2228 char *lock_path(const char *name)
2229 {
2230 return xx_path(name, lp_lockdir());
2231 }
2232
2233 /**
2234 * @brief Returns an absolute path to a file in the Samba pid directory.
2235 *
2236 * @param name File to find, relative to PIDDIR.
2237 *
2238 * @retval Pointer to a talloc'ed string containing the full path.
2239 **/
2240
2241 char *pid_path(const char *name)
2242 {
2243 return xx_path(name, lp_piddir());
2244 }
2245
2246 /**
2247 * @brief Returns an absolute path to a file in the Samba lib directory.
2248 *
2249 * @param name File to find, relative to LIBDIR.
2250 *
2251 * @retval Pointer to a string containing the full path.
2252 **/
2253
2254 char *lib_path(const char *name)
2255 {
2256 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2257 }
2258
2259 /**
2260 * @brief Returns an absolute path to a file in the Samba modules directory.
2261 *
2262 * @param name File to find, relative to MODULESDIR.
2263 *
2264 * @retval Pointer to a string containing the full path.
2265 **/
2266
2267 char *modules_path(const char *name)
2268 {
2269 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2270 }
2271
2272 /**
2273 * @brief Returns an absolute path to a file in the Samba data directory.
2274 *
2275 * @param name File to find, relative to CODEPAGEDIR.
2276 *
2277 * @retval Pointer to a talloc'ed string containing the full path.
2278 **/
2279
2280 char *data_path(const char *name)
2281 {
2282 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2283 }
2284
2285 /**
2286 * @brief Returns an absolute path to a file in the Samba state directory.
2287 *
2288 * @param name File to find, relative to STATEDIR.
2289 *
2290 * @retval Pointer to a talloc'ed string containing the full path.
2291 **/
2292
2293 char *state_path(const char *name)
2294 {
2295 return xx_path(name, lp_statedir());
2296 }
2297
2298 /**
2299 * @brief Returns an absolute path to a file in the Samba cache directory.
2300 *
2301 * @param name File to find, relative to CACHEDIR.
2302 *
2303 * @retval Pointer to a talloc'ed string containing the full path.
2304 **/
2305
2306 char *cache_path(const char *name)
2307 {
2308 return xx_path(name, lp_cachedir());
2309 }
2310
2311 /**
2312 * @brief Returns the platform specific shared library extension.
2313 *
2314 * @retval Pointer to a const char * containing the extension.
2315 **/
2316
2317 const char *shlib_ext(void)
2318 {
2319 return get_dyn_SHLIBEXT();
2320 }
2321
2322 /*******************************************************************
2323 Given a filename - get its directory name
2324 ********************************************************************/
2325
2326 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
2327 const char **name)
2328 {
2329 char *p;
2330 ptrdiff_t len;
2331
2332 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2333
2334 if (p == NULL) {
2335 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2336 return False;
2337 }
2338 if (name) {
2339 *name = "";
2340 }
2341 return True;
2342 }
2343
2344 len = p-dir;
2345
2346 if (!(*parent = (char *)TALLOC_MEMDUP(mem_ctx, dir, len+1))) {
2347 return False;
2348 }
2349 (*parent)[len] = '\0';
2350
2351 if (name) {
2352 *name = p+1;
2353 }
2354 return True;
2355 }
2356
2357 /*******************************************************************
2358 Determine if a pattern contains any Microsoft wildcard characters.
2359 *******************************************************************/
2360
2361 bool ms_has_wild(const char *s)
2362 {
2363 char c;
2364
2365 if (lp_posix_pathnames()) {
2366 /* With posix pathnames no characters are wild. */
2367 return False;
2368 }
2369
2370 while ((c = *s++)) {
2371 switch (c) {
2372 case '*':
2373 case '?':
2374 case '<':
2375 case '>':
2376 case '"':
2377 return True;
2378 }
2379 }
2380 return False;
2381 }
2382
2383 bool ms_has_wild_w(const smb_ucs2_t *s)
2384 {
2385 smb_ucs2_t c;
2386 if (!s) return False;
2387 while ((c = *s++)) {
2388 switch (c) {
2389 case UCS2_CHAR('*'):
2390 case UCS2_CHAR('?'):
2391 case UCS2_CHAR('<'):
2392 case UCS2_CHAR('>'):
2393 case UCS2_CHAR('"'):
2394 return True;
2395 }
2396 }
2397 return False;
2398 }
2399
2400 /*******************************************************************
2401 A wrapper that handles case sensitivity and the special handling
2402 of the ".." name.
2403 *******************************************************************/
2404
2405 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2406 {
2407 if (strcmp(string,"..") == 0)
2408 string = ".";
2409 if (strcmp(pattern,".") == 0)
2410 return False;
2411
2412 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2413 }
2414
2415 /*******************************************************************
2416 A wrapper that handles case sensitivity and the special handling
2417 of the ".." name. Varient that is only called by old search code which requires
2418 pattern translation.
2419 *******************************************************************/
2420
2421 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2422 {
2423 if (strcmp(string,"..") == 0)
2424 string = ".";
2425 if (strcmp(pattern,".") == 0)
2426 return False;
2427
2428 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2429 }
2430
2431 /*******************************************************************
2432 A wrapper that handles a list of patters and calls mask_match()
2433 on each. Returns True if any of the patterns match.
2434 *******************************************************************/
2435
2436 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2437 {
2438 while (listLen-- > 0) {
2439 if (mask_match(string, *list++, is_case_sensitive))
2440 return True;
2441 }
2442 return False;
2443 }
2444
2445 /*********************************************************
2446 Recursive routine that is called by unix_wild_match.
2447 *********************************************************/
2448
2449 static bool unix_do_match(const char *regexp, const char *str)
2450 {
2451 const char *p;
2452
2453 for( p = regexp; *p && *str; ) {
2454
2455 switch(*p) {
2456 case '?':
2457 str++;
2458 p++;
2459 break;
2460
2461 case '*':
2462
2463 /*
2464 * Look for a character matching
2465 * the one after the '*'.
2466 */
2467 p++;
2468 if(!*p)
2469 return true; /* Automatic match */
2470 while(*str) {
2471
2472 while(*str && (*p != *str))
2473 str++;
2474
2475 /*
2476 * Patch from weidel@multichart.de. In the case of the regexp
2477 * '*XX*' we want to ensure there are at least 2 'X' characters
2478 * in the string after the '*' for a match to be made.
2479 */
2480
2481 {
2482 int matchcount=0;
2483
2484 /*
2485 * Eat all the characters that match, but count how many there were.
2486 */
2487
2488 while(*str && (*p == *str)) {
2489 str++;
2490 matchcount++;
2491 }
2492
2493 /*
2494 * Now check that if the regexp had n identical characters that
2495 * matchcount had at least that many matches.
2496 */
2497
2498 while ( *(p+1) && (*(p+1) == *p)) {
2499 p++;
2500 matchcount--;
2501 }
2502
2503 if ( matchcount <= 0 )
2504 return false;
2505 }
2506
2507 str--; /* We've eaten the match char after the '*' */
2508
2509 if(unix_do_match(p, str))
2510 return true;
2511
2512 if(!*str)
2513 return false;
2514 else
2515 str++;
2516 }
2517 return false;
2518
2519 default:
2520 if(*str != *p)
2521 return false;
2522 str++;
2523 p++;
2524 break;
2525 }
2526 }
2527
2528 if(!*p && !*str)
2529 return true;
2530
2531 if (!*p && str[0] == '.' && str[1] == 0)
2532 return true;
2533
2534 if (!*str && *p == '?') {
2535 while (*p == '?')
2536 p++;
2537 return(!*p);
2538 }
2539
2540 if(!*str && (*p == '*' && p[1] == '\0'))
2541 return true;
2542
2543 return false;
2544 }
2545
2546 /*******************************************************************
2547 Simple case insensitive interface to a UNIX wildcard matcher.
2548 Returns True if match, False if not.
2549 *******************************************************************/
2550
2551 bool unix_wild_match(const char *pattern, const char *string)
2552 {
2553 TALLOC_CTX *ctx = talloc_stackframe();
2554 char *p2;
2555 char *s2;
2556 char *p;
2557 bool ret = false;
2558
2559 p2 = talloc_strdup(ctx,pattern);
2560 s2 = talloc_strdup(ctx,string);
2561 if (!p2 || !s2) {
2562 TALLOC_FREE(ctx);
2563 return false;
2564 }
2565 strlower_m(p2);
2566 strlower_m(s2);
2567
2568 /* Remove any *? and ** from the pattern as they are meaningless */
2569 for(p = p2; *p; p++) {
2570 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2571 memmove(&p[1], &p[2], strlen(&p[2])+1);
2572 }
2573 }
2574
2575 if (strequal(p2,"*")) {
2576 TALLOC_FREE(ctx);
2577 return true;
2578 }
2579
2580 ret = unix_do_match(p2, s2);
2581 TALLOC_FREE(ctx);
2582 return ret;
2583 }
2584
2585 /**********************************************************************
2586 Converts a name to a fully qualified domain name.
2587 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2588 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2589 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2590 ***********************************************************************/
2591
2592 bool name_to_fqdn(fstring fqdn, const char *name)
2593 {
2594 char *full = NULL;
2595 struct hostent *hp = gethostbyname(name);
2596
2597 if (!hp || !hp->h_name || !*hp->h_name) {
2598 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2599 fstrcpy(fqdn, name);
2600 return false;
2601 }
2602
2603 /* Find out if the fqdn is returned as an alias
2604 * to cope with /etc/hosts files where the first
2605 * name is not the fqdn but the short name */
2606 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2607 int i;
2608 for (i = 0; hp->h_aliases[i]; i++) {
2609 if (strchr_m(hp->h_aliases[i], '.')) {
2610 full = hp->h_aliases[i];
2611 break;
2612 }
2613 }
2614 }
2615 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2616 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2617 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2618 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2619 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2620 full = hp->h_name;
2621 }
2622 if (!full) {
2623 full = hp->h_name;
2624 }
2625
2626 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2627 fstrcpy(fqdn, full);
2628 return true;
2629 }
2630
2631 /**********************************************************************
2632 Append a DATA_BLOB to a talloc'ed object
2633 ***********************************************************************/
2634
2635 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
2636 {
2637 size_t old_size = 0;
2638 char *result;
2639
2640 if (blob.length == 0) {
2641 return buf;
2642 }
2643
2644 if (buf != NULL) {
2645 old_size = talloc_get_size(buf);
2646 }
2647
2648 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
2649 if (result == NULL) {
2650 return NULL;
2651 }
2652
2653 memcpy(result + old_size, blob.data, blob.length);
2654 return result;
2655 }
2656
2657 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2658 {
2659 switch (share_access & ~FILE_SHARE_DELETE) {
2660 case FILE_SHARE_NONE:
2661 return DENY_ALL;
2662 case FILE_SHARE_READ:
2663 return DENY_WRITE;
2664 case FILE_SHARE_WRITE:
2665 return DENY_READ;
2666 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2667 return DENY_NONE;
2668 }
2669 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2670 return DENY_DOS;
2671 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2672 return DENY_FCB;
2673 }
2674
2675 return (uint32)-1;
2676 }
2677
2678 pid_t procid_to_pid(const struct server_id *proc)
2679 {
2680 return proc->pid;
2681 }
2682
2683 static uint32 my_vnn = NONCLUSTER_VNN;
2684
2685 void set_my_vnn(uint32 vnn)
2686 {
2687 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
2688 my_vnn = vnn;
2689 }
2690
2691 uint32 get_my_vnn(void)
2692 {
2693 return my_vnn;
2694 }
2695
2696 struct server_id pid_to_procid(pid_t pid)
2697 {
2698 struct server_id result;
2699 result.pid = pid;
2700 #ifdef CLUSTER_SUPPORT
2701 result.vnn = my_vnn;
2702 #endif
2703 return result;
2704 }
2705
2706 struct server_id procid_self(void)
2707 {
2708 return pid_to_procid(sys_getpid());
2709 }
2710
2711 struct server_id server_id_self(void)
2712 {
2713 return procid_self();
2714 }
2715
2716 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
2717 {
2718 if (p1->pid != p2->pid)
2719 return False;
2720 #ifdef CLUSTER_SUPPORT
2721 if (p1->vnn != p2->vnn)
2722 return False;
2723 #endif
2724 return True;
2725 }
2726
2727 bool cluster_id_equal(const struct server_id *id1,
2728 const struct server_id *id2)
2729 {
2730 return procid_equal(id1, id2);
2731 }
2732
2733 bool procid_is_me(const struct server_id *pid)
2734 {
2735 if (pid->pid != sys_getpid())
2736 return False;
2737 #ifdef CLUSTER_SUPPORT
2738 if (pid->vnn != my_vnn)
2739 return False;
2740 #endif
2741 return True;
2742 }
2743
2744 struct server_id interpret_pid(const char *pid_string)
2745 {
2746 #ifdef CLUSTER_SUPPORT
2747 unsigned int vnn, pid;
2748 struct server_id result;
2749 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
2750 result.vnn = vnn;
2751 result.pid = pid;
2752 }
2753 else if (sscanf(pid_string, "%u", &pid) == 1) {
2754 result.vnn = get_my_vnn();
2755 result.pid = pid;
2756 }
2757 else {
2758 result.vnn = NONCLUSTER_VNN;
2759 result.pid = -1;
2760 }
2761 return result;
2762 #else
2763 return pid_to_procid(atoi(pid_string));
2764 #endif
2765 }
2766
2767 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
2768 {
2769 #ifdef CLUSTER_SUPPORT
2770 if (pid->vnn == NONCLUSTER_VNN) {
2771 return talloc_asprintf(mem_ctx,
2772 "%d",
2773 (int)pid->pid);
2774 }
2775 else {
2776 return talloc_asprintf(mem_ctx,
2777 "%u:%d",
2778 (unsigned)pid->vnn,
2779 (int)pid->pid);
2780 }
2781 #else
2782 return talloc_asprintf(mem_ctx,
2783 "%d",
2784 (int)pid->pid);
2785 #endif
2786 }
2787
2788 char *procid_str_static(const struct server_id *pid)
2789 {
2790 return procid_str(talloc_tos(), pid);
2791 }
2792
2793 bool procid_valid(const struct server_id *pid)
2794 {
2795 return (pid->pid != -1);
2796 }
2797
2798 bool procid_is_local(const struct server_id *pid)
2799 {
2800 #ifdef CLUSTER_SUPPORT
2801 return pid->vnn == my_vnn;
2802 #else
2803 return True;
2804 #endif
2805 }
2806
2807 int this_is_smp(void)
2808 {
2809 #if defined(HAVE_SYSCONF)
2810
2811 #if defined(SYSCONF_SC_NPROC_ONLN)
2812 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
2813 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
2814 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
2815 #else
2816 return 0;
2817 #endif
2818
2819 #else
2820 return 0;
2821 #endif
2822 }
2823
2824 /****************************************************************
2825 Check if offset/length fit into bufsize. Should probably be
2826 merged with is_offset_safe, but this would require a rewrite
2827 of lanman.c. Later :-)
2828 ****************************************************************/
2829
2830 bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
2831 {
2832 if ((offset + length < offset) || (offset + length < length)) {
2833 /* wrap */
2834 return true;
2835 }
2836 if ((offset > bufsize) || (offset + length > bufsize)) {
2837 /* overflow */
2838 return true;
2839 }
2840 return false;
2841 }
2842
2843 /****************************************************************
2844 Check if an offset into a buffer is safe.
2845 If this returns True it's safe to indirect into the byte at
2846 pointer ptr+off.
2847 ****************************************************************/
2848
2849 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2850 {
2851 const char *end_base = buf_base + buf_len;
2852 char *end_ptr = ptr + off;
2853
2854 if (!buf_base || !ptr) {
2855 return False;
2856 }
2857
2858 if (end_base < buf_base || end_ptr < ptr) {
2859 return False; /* wrap. */
2860 }
2861
2862 if (end_ptr < end_base) {
2863 return True;
2864 }
2865 return False;
2866 }
2867
2868 /****************************************************************
2869 Return a safe pointer into a buffer, or NULL.
2870 ****************************************************************/
2871
2872 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2873 {
2874 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2875 ptr + off : NULL;
2876 }
2877
2878 /****************************************************************
2879 Return a safe pointer into a string within a buffer, or NULL.
2880 ****************************************************************/
2881
2882 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2883 {
2884 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2885 return NULL;
2886 }
2887 /* Check if a valid string exists at this offset. */
2888 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2889 return NULL;
2890 }
2891 return ptr + off;
2892 }
2893
2894 /****************************************************************
2895 Return an SVAL at a pointer, or failval if beyond the end.
2896 ****************************************************************/
2897
2898 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2899 {
2900 /*
2901 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2902 * NOT ptr[2].
2903 */
2904 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2905 return failval;
2906 }
2907 return SVAL(ptr,off);
2908 }
2909
2910 /****************************************************************
2911 Return an IVAL at a pointer, or failval if beyond the end.
2912 ****************************************************************/
2913
2914 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2915 {
2916 /*
2917 * Note we use off+3 here, not off+4 as IVAL accesses
2918 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2919 */
2920 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2921 return failval;
2922 }
2923 return IVAL(ptr,off);
2924 }
2925
2926 /****************************************************************
2927 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2928 call (they take care of winbind separator and other winbind specific settings).
2929 ****************************************************************/
2930
2931 void split_domain_user(TALLOC_CTX *mem_ctx,
2932 const char *full_name,
2933 char **domain,
2934 char **user)
2935 {
2936 const char *p = NULL;
2937
2938 p = strchr_m(full_name, '\\');
2939
2940 if (p != NULL) {
2941 *domain = talloc_strndup(mem_ctx, full_name,
2942 PTR_DIFF(p, full_name));
2943 *user = talloc_strdup(mem_ctx, p+1);
2944 } else {
2945 *domain = talloc_strdup(mem_ctx, "");
2946 *user = talloc_strdup(mem_ctx, full_name);
2947 }
2948 }
2949
2950 #if 0
2951
2952 Disable these now we have checked all code paths and ensured
2953 NULL returns on zero request. JRA.
2954
2955 /****************************************************************
2956 talloc wrapper functions that guarentee a null pointer return
2957 if size == 0.
2958 ****************************************************************/
2959
2960 #ifndef MAX_TALLOC_SIZE
2961 #define MAX_TALLOC_SIZE 0x10000000
2962 #endif
2963
2964 /*
2965 * talloc and zero memory.
2966 * - returns NULL if size is zero.
2967 */
2968
2969 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
2970 {
2971 void *p;
2972
2973 if (size == 0) {
2974 return NULL;
2975 }
2976
2977 p = talloc_named_const(ctx, size, name);
2978
2979 if (p) {
2980 memset(p, '\0', size);
2981 }
2982
2983 return p;
2984 }
2985
2986 /*
2987 * memdup with a talloc.
2988 * - returns NULL if size is zero.
2989 */
2990
2991 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
2992 {
2993 void *newp;
2994
2995 if (size == 0) {
2996 return NULL;
2997 }
2998
2999 newp = talloc_named_const(t, size, name);
3000 if (newp) {
3001 memcpy(newp, p, size);
3002 }
3003
3004 return newp;
3005 }
3006
3007 /*
3008 * alloc an array, checking for integer overflow in the array size.
3009 * - returns NULL if count or el_size are zero.
3010 */
3011
3012 void *_talloc_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_named_const(ctx, el_size * count, name);
3023 }
3024
3025 /*
3026 * alloc an zero array, checking for integer overflow in the array size
3027 * - returns NULL if count or el_size are zero.
3028 */
3029
3030 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3031 {
3032 if (count >= MAX_TALLOC_SIZE/el_size) {
3033 return NULL;
3034 }
3035
3036 if (el_size == 0 || count == 0) {
3037 return NULL;
3038 }
3039
3040 return _talloc_zero(ctx, el_size * count, name);
3041 }
3042
3043 /*
3044 * Talloc wrapper that returns NULL if size == 0.
3045 */
3046 void *talloc_zeronull(const void *context, size_t size, const char *name)
3047 {
3048 if (size == 0) {
3049 return NULL;
3050 }
3051 return talloc_named_const(context, size, name);
3052 }
3053 #endif
3054
3055 /* Split a path name into filename and stream name components. Canonicalise
3056 * such that an implicit $DATA token is always explicit.
3057 *
3058 * The "specification" of this function can be found in the
3059 * run_local_stream_name() function in torture.c, I've tried those
3060 * combinations against a W2k3 server.
3061 */
3062
3063 NTSTATUS split_ntfs_stream_name(TALLOC_CTX *mem_ctx, const char *fname,
3064 char **pbase, char **pstream)
3065 {
3066 char *base = NULL;
3067 char *stream = NULL;
3068 char *sname; /* stream name */
3069 const char *stype; /* stream type */
3070
3071 DEBUG(10, ("split_ntfs_stream_name called for [%s]\n", fname));
3072
3073 sname = strchr_m(fname, ':');
3074
3075 if (lp_posix_pathnames() || (sname == NULL)) {
3076 if (pbase != NULL) {
3077 base = talloc_strdup(mem_ctx, fname);
3078 NT_STATUS_HAVE_NO_MEMORY(base);
3079 }
3080 goto done;
3081 }
3082
3083 if (pbase != NULL) {
3084 base = talloc_strndup(mem_ctx, fname, PTR_DIFF(sname, fname));
3085 NT_STATUS_HAVE_NO_MEMORY(base);
3086 }
3087
3088 sname += 1;
3089
3090 stype = strchr_m(sname, ':');
3091
3092 if (stype == NULL) {
3093 sname = talloc_strdup(mem_ctx, sname);
3094 stype = "$DATA";
3095 }
3096 else {
3097 if (StrCaseCmp(stype, ":$DATA") != 0) {
3098 /*
3099 * If there is an explicit stream type, so far we only
3100 * allow $DATA. Is there anything else allowed? -- vl
3101 */
3102 DEBUG(10, ("[%s] is an invalid stream type\n", stype));
3103 TALLOC_FREE(base);
3104 return NT_STATUS_OBJECT_NAME_INVALID;
3105 }
3106 sname = talloc_strndup(mem_ctx, sname, PTR_DIFF(stype, sname));
3107 stype += 1;
3108 }
3109
3110 if (sname == NULL) {
3111 TALLOC_FREE(base);
3112 return NT_STATUS_NO_MEMORY;
3113 }
3114
3115 if (sname[0] == '\0') {
3116 /*
3117 * no stream name, so no stream
3118 */
3119 goto done;
3120 }
3121
3122 if (pstream != NULL) {
3123 stream = talloc_asprintf(mem_ctx, "%s:%s", sname, stype);
3124 if (stream == NULL) {
3125 TALLOC_FREE(sname);
3126 TALLOC_FREE(base);
3127 return NT_STATUS_NO_MEMORY;
3128 }
3129 /*
3130 * upper-case the type field
3131 */
3132 strupper_m(strchr_m(stream, ':')+1);
3133 }
3134
3135 done:
3136 if (pbase != NULL) {
3137 *pbase = base;
3138 }
3139 if (pstream != NULL) {
3140 *pstream = stream;
3141 }
3142 return NT_STATUS_OK;
3143 }
3144
3145 bool is_valid_policy_hnd(const struct policy_handle *hnd)
3146 {
3147 struct policy_handle tmp;
3148 ZERO_STRUCT(tmp);
3149 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
3150 }
3151
3152 bool policy_hnd_equal(const struct policy_handle *hnd1,
3153 const struct policy_handle *hnd2)
3154 {
3155 if (!hnd1 || !hnd2) {
3156 return false;
3157 }
3158
3159 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
3160 }
3161
3162 /****************************************************************
3163 strip off leading '\\' from a hostname
3164 ****************************************************************/
3165
3166 const char *strip_hostname(const char *s)
3167 {
3168 if (!s) {
3169 return NULL;
3170 }
3171
3172 if (strlen_m(s) < 3) {
3173 return s;
3174 }
3175
3176 if (s[0] == '\\') s++;
3177 if (s[0] == '\\') s++;
3178
3179 return s;
3180 }
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