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s3: Call va_end() after all va_start()/va_copy() calls.
[Samba.git] / source3 / lib / util.c
blobc0bb042d28256aa7d91b39c8700f461d4364e8dd
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 Check if a file exists - call vfs_file_exist for samba files.
500 ********************************************************************/
501
502 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf)
503 {
504 SMB_STRUCT_STAT st;
505 if (!sbuf)
506 sbuf = &st;
507
508 if (sys_stat(fname,sbuf) != 0)
509 return(False);
510
511 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
512 }
513
514 /*******************************************************************
515 Check if a unix domain socket exists - call vfs_file_exist for samba files.
516 ********************************************************************/
517
518 bool socket_exist(const char *fname)
519 {
520 SMB_STRUCT_STAT st;
521 if (sys_stat(fname,&st) != 0)
522 return(False);
523
524 return S_ISSOCK(st.st_ex_mode);
525 }
526
527 /*******************************************************************
528 Check if a directory exists.
529 ********************************************************************/
530
531 bool directory_exist_stat(char *dname,SMB_STRUCT_STAT *st)
532 {
533 SMB_STRUCT_STAT st2;
534 bool ret;
535
536 if (!st)
537 st = &st2;
538
539 if (sys_stat(dname,st) != 0)
540 return(False);
541
542 ret = S_ISDIR(st->st_ex_mode);
543 if(!ret)
544 errno = ENOTDIR;
545 return ret;
546 }
547
548 /*******************************************************************
549 Returns the size in bytes of the named given the stat struct.
550 ********************************************************************/
551
552 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
553 {
554 return sbuf->st_ex_size;
555 }
556
557 /*******************************************************************
558 Returns the size in bytes of the named file.
559 ********************************************************************/
560
561 SMB_OFF_T get_file_size(char *file_name)
562 {
563 SMB_STRUCT_STAT buf;
564 buf.st_ex_size = 0;
565 if(sys_stat(file_name,&buf) != 0)
566 return (SMB_OFF_T)-1;
567 return get_file_size_stat(&buf);
568 }
569
570 /*******************************************************************
571 Return a string representing an attribute for a file.
572 ********************************************************************/
573
574 char *attrib_string(uint16 mode)
575 {
576 fstring attrstr;
577
578 attrstr[0] = 0;
579
580 if (mode & aVOLID) fstrcat(attrstr,"V");
581 if (mode & aDIR) fstrcat(attrstr,"D");
582 if (mode & aARCH) fstrcat(attrstr,"A");
583 if (mode & aHIDDEN) fstrcat(attrstr,"H");
584 if (mode & aSYSTEM) fstrcat(attrstr,"S");
585 if (mode & aRONLY) fstrcat(attrstr,"R");
586
587 return talloc_strdup(talloc_tos(), attrstr);
588 }
589
590 /*******************************************************************
591 Show a smb message structure.
592 ********************************************************************/
593
594 void show_msg(char *buf)
595 {
596 int i;
597 int bcc=0;
598
599 if (!DEBUGLVL(5))
600 return;
601
602 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
603 smb_len(buf),
604 (int)CVAL(buf,smb_com),
605 (int)CVAL(buf,smb_rcls),
606 (int)CVAL(buf,smb_reh),
607 (int)SVAL(buf,smb_err),
608 (int)CVAL(buf,smb_flg),
609 (int)SVAL(buf,smb_flg2)));
610 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
611 (int)SVAL(buf,smb_tid),
612 (int)SVAL(buf,smb_pid),
613 (int)SVAL(buf,smb_uid),
614 (int)SVAL(buf,smb_mid)));
615 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
616
617 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
618 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
619 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
620
621 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
622
623 DEBUGADD(5,("smb_bcc=%d\n",bcc));
624
625 if (DEBUGLEVEL < 10)
626 return;
627
628 if (DEBUGLEVEL < 50)
629 bcc = MIN(bcc, 512);
630
631 dump_data(10, (uint8 *)smb_buf(buf), bcc);
632 }
633
634 /*******************************************************************
635 Set the length and marker of an encrypted smb packet.
636 ********************************************************************/
637
638 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
639 {
640 _smb_setlen(buf,len);
641
642 SCVAL(buf,4,0xFF);
643 SCVAL(buf,5,'E');
644 SSVAL(buf,6,enc_ctx_num);
645 }
646
647 /*******************************************************************
648 Set the length and marker of an smb packet.
649 ********************************************************************/
650
651 void smb_setlen(char *buf,int len)
652 {
653 _smb_setlen(buf,len);
654
655 SCVAL(buf,4,0xFF);
656 SCVAL(buf,5,'S');
657 SCVAL(buf,6,'M');
658 SCVAL(buf,7,'B');
659 }
660
661 /*******************************************************************
662 Setup only the byte count for a smb message.
663 ********************************************************************/
664
665 int set_message_bcc(char *buf,int num_bytes)
666 {
667 int num_words = CVAL(buf,smb_wct);
668 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
669 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
670 return (smb_size + num_words*2 + num_bytes);
671 }
672
673 /*******************************************************************
674 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
675 Return the bytes added
676 ********************************************************************/
677
678 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
679 {
680 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
681 uint8 *tmp;
682
683 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
684 DEBUG(0, ("talloc failed\n"));
685 return -1;
686 }
687 *outbuf = tmp;
688
689 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
690 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
691 return blob.length;
692 }
693
694 /*******************************************************************
695 Reduce a file name, removing .. elements.
696 ********************************************************************/
697
698 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
699 {
700 char *p = NULL;
701 char *str = NULL;
702
703 DEBUG(3,("dos_clean_name [%s]\n",s));
704
705 /* remove any double slashes */
706 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
707 if (!str) {
708 return NULL;
709 }
710
711 /* Remove leading .\\ characters */
712 if(strncmp(str, ".\\", 2) == 0) {
713 trim_string(str, ".\\", NULL);
714 if(*str == 0) {
715 str = talloc_strdup(ctx, ".\\");
716 if (!str) {
717 return NULL;
718 }
719 }
720 }
721
722 while ((p = strstr_m(str,"\\..\\")) != NULL) {
723 char *s1;
724
725 *p = 0;
726 s1 = p+3;
727
728 if ((p=strrchr_m(str,'\\')) != NULL) {
729 *p = 0;
730 } else {
731 *str = 0;
732 }
733 str = talloc_asprintf(ctx,
734 "%s%s",
735 str,
736 s1);
737 if (!str) {
738 return NULL;
739 }
740 }
741
742 trim_string(str,NULL,"\\..");
743 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
744 }
745
746 /*******************************************************************
747 Reduce a file name, removing .. elements.
748 ********************************************************************/
749
750 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
751 {
752 char *p = NULL;
753 char *str = NULL;
754
755 DEBUG(3,("unix_clean_name [%s]\n",s));
756
757 /* remove any double slashes */
758 str = talloc_all_string_sub(ctx, s, "//","/");
759 if (!str) {
760 return NULL;
761 }
762
763 /* Remove leading ./ characters */
764 if(strncmp(str, "./", 2) == 0) {
765 trim_string(str, "./", NULL);
766 if(*str == 0) {
767 str = talloc_strdup(ctx, "./");
768 if (!str) {
769 return NULL;
770 }
771 }
772 }
773
774 while ((p = strstr_m(str,"/../")) != NULL) {
775 char *s1;
776
777 *p = 0;
778 s1 = p+3;
779
780 if ((p=strrchr_m(str,'/')) != NULL) {
781 *p = 0;
782 } else {
783 *str = 0;
784 }
785 str = talloc_asprintf(ctx,
786 "%s%s",
787 str,
788 s1);
789 if (!str) {
790 return NULL;
791 }
792 }
793
794 trim_string(str,NULL,"/..");
795 return talloc_all_string_sub(ctx, str, "/./", "/");
796 }
797
798 char *clean_name(TALLOC_CTX *ctx, const char *s)
799 {
800 char *str = dos_clean_name(ctx, s);
801 if (!str) {
802 return NULL;
803 }
804 return unix_clean_name(ctx, str);
805 }
806
807 /*******************************************************************
808 Write data into an fd at a given offset. Ignore seek errors.
809 ********************************************************************/
810
811 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
812 {
813 size_t total=0;
814 ssize_t ret;
815
816 if (pos == (SMB_OFF_T)-1) {
817 return write_data(fd, buffer, N);
818 }
819 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
820 while (total < N) {
821 ret = sys_pwrite(fd,buffer + total,N - total, pos);
822 if (ret == -1 && errno == ESPIPE) {
823 return write_data(fd, buffer + total,N - total);
824 }
825 if (ret == -1) {
826 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
827 return -1;
828 }
829 if (ret == 0) {
830 return total;
831 }
832 total += ret;
833 pos += ret;
834 }
835 return (ssize_t)total;
836 #else
837 /* Use lseek and write_data. */
838 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
839 if (errno != ESPIPE) {
840 return -1;
841 }
842 }
843 return write_data(fd, buffer, N);
844 #endif
845 }
846
847 /*******************************************************************
848 Sleep for a specified number of milliseconds.
849 ********************************************************************/
850
851 void smb_msleep(unsigned int t)
852 {
853 #if defined(HAVE_NANOSLEEP)
854 struct timespec tval;
855 int ret;
856
857 tval.tv_sec = t/1000;
858 tval.tv_nsec = 1000000*(t%1000);
859
860 do {
861 errno = 0;
862 ret = nanosleep(&tval, &tval);
863 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
864 #else
865 unsigned int tdiff=0;
866 struct timeval tval,t1,t2;
867 fd_set fds;
868
869 GetTimeOfDay(&t1);
870 t2 = t1;
871
872 while (tdiff < t) {
873 tval.tv_sec = (t-tdiff)/1000;
874 tval.tv_usec = 1000*((t-tdiff)%1000);
875
876 /* Never wait for more than 1 sec. */
877 if (tval.tv_sec > 1) {
878 tval.tv_sec = 1;
879 tval.tv_usec = 0;
880 }
881
882 FD_ZERO(&fds);
883 errno = 0;
884 sys_select_intr(0,&fds,NULL,NULL,&tval);
885
886 GetTimeOfDay(&t2);
887 if (t2.tv_sec < t1.tv_sec) {
888 /* Someone adjusted time... */
889 t1 = t2;
890 }
891
892 tdiff = TvalDiff(&t1,&t2);
893 }
894 #endif
895 }
896
897 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
898 struct event_context *ev_ctx,
899 bool parent_longlived)
900 {
901 NTSTATUS status = NT_STATUS_OK;
902
903 /* Reset the state of the random
904 * number generation system, so
905 * children do not get the same random
906 * numbers as each other */
907 set_need_random_reseed();
908
909 /* tdb needs special fork handling */
910 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
911 DEBUG(0,("tdb_reopen_all failed.\n"));
912 status = NT_STATUS_OPEN_FAILED;
913 goto done;
914 }
915
916 if (ev_ctx) {
917 event_context_reinit(ev_ctx);
918 }
919
920 if (msg_ctx) {
921 /*
922 * For clustering, we need to re-init our ctdbd connection after the
923 * fork
924 */
925 status = messaging_reinit(msg_ctx);
926 if (!NT_STATUS_IS_OK(status)) {
927 DEBUG(0,("messaging_reinit() failed: %s\n",
928 nt_errstr(status)));
929 }
930 }
931 done:
932 return status;
933 }
934
935 /****************************************************************************
936 Put up a yes/no prompt.
937 ****************************************************************************/
938
939 bool yesno(const char *p)
940 {
941 char ans[20];
942 printf("%s",p);
943
944 if (!fgets(ans,sizeof(ans)-1,stdin))
945 return(False);
946
947 if (*ans == 'y' || *ans == 'Y')
948 return(True);
949
950 return(False);
951 }
952
953 #if defined(PARANOID_MALLOC_CHECKER)
954
955 /****************************************************************************
956 Internal malloc wrapper. Externally visible.
957 ****************************************************************************/
958
959 void *malloc_(size_t size)
960 {
961 if (size == 0) {
962 return NULL;
963 }
964 #undef malloc
965 return malloc(size);
966 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
967 }
968
969 /****************************************************************************
970 Internal calloc wrapper. Not externally visible.
971 ****************************************************************************/
972
973 static void *calloc_(size_t count, size_t size)
974 {
975 if (size == 0 || count == 0) {
976 return NULL;
977 }
978 #undef calloc
979 return calloc(count, size);
980 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
981 }
982
983 /****************************************************************************
984 Internal realloc wrapper. Not externally visible.
985 ****************************************************************************/
986
987 static void *realloc_(void *ptr, size_t size)
988 {
989 #undef realloc
990 return realloc(ptr, size);
991 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
992 }
993
994 #endif /* PARANOID_MALLOC_CHECKER */
995
996 /****************************************************************************
997 Type-safe memalign
998 ****************************************************************************/
999
1000 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1001 {
1002 if (count >= MAX_ALLOC_SIZE/el_size) {
1003 return NULL;
1004 }
1005
1006 return sys_memalign(align, el_size*count);
1007 }
1008
1009 /****************************************************************************
1010 Type-safe calloc.
1011 ****************************************************************************/
1012
1013 void *calloc_array(size_t size, size_t nmemb)
1014 {
1015 if (nmemb >= MAX_ALLOC_SIZE/size) {
1016 return NULL;
1017 }
1018 if (size == 0 || nmemb == 0) {
1019 return NULL;
1020 }
1021 #if defined(PARANOID_MALLOC_CHECKER)
1022 return calloc_(nmemb, size);
1023 #else
1024 return calloc(nmemb, size);
1025 #endif
1026 }
1027
1028 /****************************************************************************
1029 Expand a pointer to be a particular size.
1030 Note that this version of Realloc has an extra parameter that decides
1031 whether to free the passed in storage on allocation failure or if the
1032 new size is zero.
1033
1034 This is designed for use in the typical idiom of :
1035
1036 p = SMB_REALLOC(p, size)
1037 if (!p) {
1038 return error;
1039 }
1040
1041 and not to have to keep track of the old 'p' contents to free later, nor
1042 to worry if the size parameter was zero. In the case where NULL is returned
1043 we guarentee that p has been freed.
1044
1045 If free later semantics are desired, then pass 'free_old_on_error' as False which
1046 guarentees that the old contents are not freed on error, even if size == 0. To use
1047 this idiom use :
1048
1049 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1050 if (!tmp) {
1051 SAFE_FREE(p);
1052 return error;
1053 } else {
1054 p = tmp;
1055 }
1056
1057 Changes were instigated by Coverity error checking. JRA.
1058 ****************************************************************************/
1059
1060 void *Realloc(void *p, size_t size, bool free_old_on_error)
1061 {
1062 void *ret=NULL;
1063
1064 if (size == 0) {
1065 if (free_old_on_error) {
1066 SAFE_FREE(p);
1067 }
1068 DEBUG(2,("Realloc asked for 0 bytes\n"));
1069 return NULL;
1070 }
1071
1072 #if defined(PARANOID_MALLOC_CHECKER)
1073 if (!p) {
1074 ret = (void *)malloc_(size);
1075 } else {
1076 ret = (void *)realloc_(p,size);
1077 }
1078 #else
1079 if (!p) {
1080 ret = (void *)malloc(size);
1081 } else {
1082 ret = (void *)realloc(p,size);
1083 }
1084 #endif
1085
1086 if (!ret) {
1087 if (free_old_on_error && p) {
1088 SAFE_FREE(p);
1089 }
1090 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1091 }
1092
1093 return(ret);
1094 }
1095
1096 /****************************************************************************
1097 (Hopefully) efficient array append.
1098 ****************************************************************************/
1099
1100 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1101 void *element, void *_array, uint32 *num_elements,
1102 ssize_t *array_size)
1103 {
1104 void **array = (void **)_array;
1105
1106 if (*array_size < 0) {
1107 return;
1108 }
1109
1110 if (*array == NULL) {
1111 if (*array_size == 0) {
1112 *array_size = 128;
1113 }
1114
1115 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1116 goto error;
1117 }
1118
1119 *array = TALLOC(mem_ctx, element_size * (*array_size));
1120 if (*array == NULL) {
1121 goto error;
1122 }
1123 }
1124
1125 if (*num_elements == *array_size) {
1126 *array_size *= 2;
1127
1128 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1129 goto error;
1130 }
1131
1132 *array = TALLOC_REALLOC(mem_ctx, *array,
1133 element_size * (*array_size));
1134
1135 if (*array == NULL) {
1136 goto error;
1137 }
1138 }
1139
1140 memcpy((char *)(*array) + element_size*(*num_elements),
1141 element, element_size);
1142 *num_elements += 1;
1143
1144 return;
1145
1146 error:
1147 *num_elements = 0;
1148 *array_size = -1;
1149 }
1150
1151 /****************************************************************************
1152 Get my own domain name, or "" if we have none.
1153 ****************************************************************************/
1154
1155 char *get_mydnsdomname(TALLOC_CTX *ctx)
1156 {
1157 const char *domname;
1158 char *p;
1159
1160 domname = get_mydnsfullname();
1161 if (!domname) {
1162 return NULL;
1163 }
1164
1165 p = strchr_m(domname, '.');
1166 if (p) {
1167 p++;
1168 return talloc_strdup(ctx, p);
1169 } else {
1170 return talloc_strdup(ctx, "");
1171 }
1172 }
1173
1174 /****************************************************************************
1175 Interpret a protocol description string, with a default.
1176 ****************************************************************************/
1177
1178 int interpret_protocol(const char *str,int def)
1179 {
1180 if (strequal(str,"NT1"))
1181 return(PROTOCOL_NT1);
1182 if (strequal(str,"LANMAN2"))
1183 return(PROTOCOL_LANMAN2);
1184 if (strequal(str,"LANMAN1"))
1185 return(PROTOCOL_LANMAN1);
1186 if (strequal(str,"CORE"))
1187 return(PROTOCOL_CORE);
1188 if (strequal(str,"COREPLUS"))
1189 return(PROTOCOL_COREPLUS);
1190 if (strequal(str,"CORE+"))
1191 return(PROTOCOL_COREPLUS);
1192
1193 DEBUG(0,("Unrecognised protocol level %s\n",str));
1194
1195 return(def);
1196 }
1197
1198
1199 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1200 /******************************************************************
1201 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1202 Based on a fix from <Thomas.Hepper@icem.de>.
1203 Returns a malloc'ed string.
1204 *******************************************************************/
1205
1206 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1207 {
1208 if (*str == '-') {
1209 const char *p = str;
1210 while(*p && !isspace(*p))
1211 p++;
1212 while(*p && isspace(*p))
1213 p++;
1214 if(*p) {
1215 return talloc_strdup(ctx, p);
1216 }
1217 }
1218 return NULL;
1219 }
1220
1221 /*******************************************************************
1222 Patch from jkf@soton.ac.uk
1223 Split Luke's automount_server into YP lookup and string splitter
1224 so can easily implement automount_path().
1225 Returns a malloc'ed string.
1226 *******************************************************************/
1227
1228 #ifdef WITH_NISPLUS_HOME
1229 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1230 {
1231 char *value = NULL;
1232
1233 char *nis_map = (char *)lp_nis_home_map_name();
1234
1235 char buffer[NIS_MAXATTRVAL + 1];
1236 nis_result *result;
1237 nis_object *object;
1238 entry_obj *entry;
1239
1240 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1241 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1242
1243 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1244 if (result->status != NIS_SUCCESS) {
1245 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1246 } else {
1247 object = result->objects.objects_val;
1248 if (object->zo_data.zo_type == ENTRY_OBJ) {
1249 entry = &object->zo_data.objdata_u.en_data;
1250 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1251 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1252
1253 value = talloc_strdup(ctx,
1254 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1255 if (!value) {
1256 nis_freeresult(result);
1257 return NULL;
1258 }
1259 value = talloc_string_sub(ctx,
1260 value,
1261 "&",
1262 user_name);
1263 }
1264 }
1265 }
1266 nis_freeresult(result);
1267
1268 if (value) {
1269 value = strip_mount_options(ctx, value);
1270 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1271 user_name, value));
1272 }
1273 return value;
1274 }
1275 #else /* WITH_NISPLUS_HOME */
1276
1277 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1278 {
1279 char *value = NULL;
1280
1281 int nis_error; /* returned by yp all functions */
1282 char *nis_result; /* yp_match inits this */
1283 int nis_result_len; /* and set this */
1284 char *nis_domain; /* yp_get_default_domain inits this */
1285 char *nis_map = (char *)lp_nis_home_map_name();
1286
1287 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1288 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1289 return NULL;
1290 }
1291
1292 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1293
1294 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1295 strlen(user_name), &nis_result,
1296 &nis_result_len)) == 0) {
1297 value = talloc_strdup(ctx, nis_result);
1298 if (!value) {
1299 return NULL;
1300 }
1301 value = strip_mount_options(ctx, value);
1302 } else if(nis_error == YPERR_KEY) {
1303 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1304 user_name, nis_map));
1305 DEBUG(3, ("using defaults for server and home directory\n"));
1306 } else {
1307 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1308 yperr_string(nis_error), user_name, nis_map));
1309 }
1310
1311 if (value) {
1312 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1313 }
1314 return value;
1315 }
1316 #endif /* WITH_NISPLUS_HOME */
1317 #endif
1318
1319 /****************************************************************************
1320 Check if a process exists. Does this work on all unixes?
1321 ****************************************************************************/
1322
1323 bool process_exists(const struct server_id pid)
1324 {
1325 if (procid_is_me(&pid)) {
1326 return True;
1327 }
1328
1329 if (procid_is_local(&pid)) {
1330 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1331 }
1332
1333 #ifdef CLUSTER_SUPPORT
1334 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1335 pid.pid);
1336 #else
1337 return False;
1338 #endif
1339 }
1340
1341 /*******************************************************************
1342 Convert a uid into a user name.
1343 ********************************************************************/
1344
1345 const char *uidtoname(uid_t uid)
1346 {
1347 TALLOC_CTX *ctx = talloc_tos();
1348 char *name = NULL;
1349 struct passwd *pass = NULL;
1350
1351 pass = getpwuid_alloc(ctx,uid);
1352 if (pass) {
1353 name = talloc_strdup(ctx,pass->pw_name);
1354 TALLOC_FREE(pass);
1355 } else {
1356 name = talloc_asprintf(ctx,
1357 "%ld",
1358 (long int)uid);
1359 }
1360 return name;
1361 }
1362
1363 /*******************************************************************
1364 Convert a gid into a group name.
1365 ********************************************************************/
1366
1367 char *gidtoname(gid_t gid)
1368 {
1369 struct group *grp;
1370
1371 grp = getgrgid(gid);
1372 if (grp) {
1373 return talloc_strdup(talloc_tos(), grp->gr_name);
1374 }
1375 else {
1376 return talloc_asprintf(talloc_tos(),
1377 "%d",
1378 (int)gid);
1379 }
1380 }
1381
1382 /*******************************************************************
1383 Convert a user name into a uid.
1384 ********************************************************************/
1385
1386 uid_t nametouid(const char *name)
1387 {
1388 struct passwd *pass;
1389 char *p;
1390 uid_t u;
1391
1392 pass = getpwnam_alloc(talloc_autofree_context(), name);
1393 if (pass) {
1394 u = pass->pw_uid;
1395 TALLOC_FREE(pass);
1396 return u;
1397 }
1398
1399 u = (uid_t)strtol(name, &p, 0);
1400 if ((p != name) && (*p == '\0'))
1401 return u;
1402
1403 return (uid_t)-1;
1404 }
1405
1406 /*******************************************************************
1407 Convert a name to a gid_t if possible. Return -1 if not a group.
1408 ********************************************************************/
1409
1410 gid_t nametogid(const char *name)
1411 {
1412 struct group *grp;
1413 char *p;
1414 gid_t g;
1415
1416 g = (gid_t)strtol(name, &p, 0);
1417 if ((p != name) && (*p == '\0'))
1418 return g;
1419
1420 grp = sys_getgrnam(name);
1421 if (grp)
1422 return(grp->gr_gid);
1423 return (gid_t)-1;
1424 }
1425
1426 /*******************************************************************
1427 Something really nasty happened - panic !
1428 ********************************************************************/
1429
1430 void smb_panic(const char *const why)
1431 {
1432 char *cmd;
1433 int result;
1434
1435 #ifdef DEVELOPER
1436 {
1437
1438 if (global_clobber_region_function) {
1439 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1440 global_clobber_region_function,
1441 global_clobber_region_line));
1442 }
1443 }
1444 #endif
1445
1446 DEBUG(0,("PANIC (pid %llu): %s\n",
1447 (unsigned long long)sys_getpid(), why));
1448 log_stack_trace();
1449
1450 cmd = lp_panic_action();
1451 if (cmd && *cmd) {
1452 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1453 result = system(cmd);
1454
1455 if (result == -1)
1456 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1457 strerror(errno)));
1458 else
1459 DEBUG(0, ("smb_panic(): action returned status %d\n",
1460 WEXITSTATUS(result)));
1461 }
1462
1463 dump_core();
1464 }
1465
1466 /*******************************************************************
1467 Print a backtrace of the stack to the debug log. This function
1468 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1469 exit shortly after calling it.
1470 ********************************************************************/
1471
1472 #ifdef HAVE_LIBUNWIND_H
1473 #include <libunwind.h>
1474 #endif
1475
1476 #ifdef HAVE_EXECINFO_H
1477 #include <execinfo.h>
1478 #endif
1479
1480 #ifdef HAVE_LIBEXC_H
1481 #include <libexc.h>
1482 #endif
1483
1484 void log_stack_trace(void)
1485 {
1486 #ifdef HAVE_LIBUNWIND
1487 /* Try to use libunwind before any other technique since on ia64
1488 * libunwind correctly walks the stack in more circumstances than
1489 * backtrace.
1490 */
1491 unw_cursor_t cursor;
1492 unw_context_t uc;
1493 unsigned i = 0;
1494
1495 char procname[256];
1496 unw_word_t ip, sp, off;
1497
1498 procname[sizeof(procname) - 1] = '\0';
1499
1500 if (unw_getcontext(&uc) != 0) {
1501 goto libunwind_failed;
1502 }
1503
1504 if (unw_init_local(&cursor, &uc) != 0) {
1505 goto libunwind_failed;
1506 }
1507
1508 DEBUG(0, ("BACKTRACE:\n"));
1509
1510 do {
1511 ip = sp = 0;
1512 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1513 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1514
1515 switch (unw_get_proc_name(&cursor,
1516 procname, sizeof(procname) - 1, &off) ) {
1517 case 0:
1518 /* Name found. */
1519 case -UNW_ENOMEM:
1520 /* Name truncated. */
1521 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1522 i, procname, (long long)off,
1523 (long long)ip, (long long) sp));
1524 break;
1525 default:
1526 /* case -UNW_ENOINFO: */
1527 /* case -UNW_EUNSPEC: */
1528 /* No symbol name found. */
1529 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1530 i, "<unknown symbol>",
1531 (long long)ip, (long long) sp));
1532 }
1533 ++i;
1534 } while (unw_step(&cursor) > 0);
1535
1536 return;
1537
1538 libunwind_failed:
1539 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1540
1541 #elif HAVE_BACKTRACE_SYMBOLS
1542 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1543 size_t backtrace_size;
1544 char **backtrace_strings;
1545
1546 /* get the backtrace (stack frames) */
1547 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1548 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1549
1550 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1551 (unsigned long)backtrace_size));
1552
1553 if (backtrace_strings) {
1554 int i;
1555
1556 for (i = 0; i < backtrace_size; i++)
1557 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1558
1559 /* Leak the backtrace_strings, rather than risk what free() might do */
1560 }
1561
1562 #elif HAVE_LIBEXC
1563
1564 /* The IRIX libexc library provides an API for unwinding the stack. See
1565 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1566 * since we are about to abort anyway, it hardly matters.
1567 */
1568
1569 #define NAMESIZE 32 /* Arbitrary */
1570
1571 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1572 char * names[BACKTRACE_STACK_SIZE];
1573 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1574
1575 int i;
1576 int levels;
1577
1578 ZERO_ARRAY(addrs);
1579 ZERO_ARRAY(names);
1580 ZERO_ARRAY(namebuf);
1581
1582 /* We need to be root so we can open our /proc entry to walk
1583 * our stack. It also helps when we want to dump core.
1584 */
1585 become_root();
1586
1587 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1588 names[i] = namebuf + (i * NAMESIZE);
1589 }
1590
1591 levels = trace_back_stack(0, addrs, names,
1592 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1593
1594 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1595 for (i = 0; i < levels; i++) {
1596 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1597 }
1598 #undef NAMESIZE
1599
1600 #else
1601 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1602 #endif
1603 }
1604
1605 /*******************************************************************
1606 A readdir wrapper which just returns the file name.
1607 ********************************************************************/
1608
1609 const char *readdirname(SMB_STRUCT_DIR *p)
1610 {
1611 SMB_STRUCT_DIRENT *ptr;
1612 char *dname;
1613
1614 if (!p)
1615 return(NULL);
1616
1617 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1618 if (!ptr)
1619 return(NULL);
1620
1621 dname = ptr->d_name;
1622
1623 #ifdef NEXT2
1624 if (telldir(p) < 0)
1625 return(NULL);
1626 #endif
1627
1628 #ifdef HAVE_BROKEN_READDIR_NAME
1629 /* using /usr/ucb/cc is BAD */
1630 dname = dname - 2;
1631 #endif
1632
1633 return talloc_strdup(talloc_tos(), dname);
1634 }
1635
1636 /*******************************************************************
1637 Utility function used to decide if the last component
1638 of a path matches a (possibly wildcarded) entry in a namelist.
1639 ********************************************************************/
1640
1641 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1642 {
1643 const char *last_component;
1644
1645 /* if we have no list it's obviously not in the path */
1646 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1647 return False;
1648 }
1649
1650 DEBUG(8, ("is_in_path: %s\n", name));
1651
1652 /* Get the last component of the unix name. */
1653 last_component = strrchr_m(name, '/');
1654 if (!last_component) {
1655 last_component = name;
1656 } else {
1657 last_component++; /* Go past '/' */
1658 }
1659
1660 for(; namelist->name != NULL; namelist++) {
1661 if(namelist->is_wild) {
1662 if (mask_match(last_component, namelist->name, case_sensitive)) {
1663 DEBUG(8,("is_in_path: mask match succeeded\n"));
1664 return True;
1665 }
1666 } else {
1667 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1668 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1669 DEBUG(8,("is_in_path: match succeeded\n"));
1670 return True;
1671 }
1672 }
1673 }
1674 DEBUG(8,("is_in_path: match not found\n"));
1675 return False;
1676 }
1677
1678 /*******************************************************************
1679 Strip a '/' separated list into an array of
1680 name_compare_enties structures suitable for
1681 passing to is_in_path(). We do this for
1682 speed so we can pre-parse all the names in the list
1683 and don't do it for each call to is_in_path().
1684 namelist is modified here and is assumed to be
1685 a copy owned by the caller.
1686 We also check if the entry contains a wildcard to
1687 remove a potentially expensive call to mask_match
1688 if possible.
1689 ********************************************************************/
1690
1691 void set_namearray(name_compare_entry **ppname_array, const char *namelist)
1692 {
1693 char *name_end;
1694 const char *nameptr = namelist;
1695 int num_entries = 0;
1696 int i;
1697
1698 (*ppname_array) = NULL;
1699
1700 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1701 return;
1702
1703 /* We need to make two passes over the string. The
1704 first to count the number of elements, the second
1705 to split it.
1706 */
1707
1708 while(*nameptr) {
1709 if ( *nameptr == '/' ) {
1710 /* cope with multiple (useless) /s) */
1711 nameptr++;
1712 continue;
1713 }
1714 /* find the next / */
1715 name_end = strchr_m(nameptr, '/');
1716
1717 /* oops - the last check for a / didn't find one. */
1718 if (name_end == NULL)
1719 break;
1720
1721 /* next segment please */
1722 nameptr = name_end + 1;
1723 num_entries++;
1724 }
1725
1726 if(num_entries == 0)
1727 return;
1728
1729 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1730 DEBUG(0,("set_namearray: malloc fail\n"));
1731 return;
1732 }
1733
1734 /* Now copy out the names */
1735 nameptr = namelist;
1736 i = 0;
1737 while(*nameptr) {
1738 if ( *nameptr == '/' ) {
1739 /* cope with multiple (useless) /s) */
1740 nameptr++;
1741 continue;
1742 }
1743 /* find the next / */
1744 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1745 *name_end = 0;
1746
1747 /* oops - the last check for a / didn't find one. */
1748 if(name_end == NULL)
1749 break;
1750
1751 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1752 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1753 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1754 return;
1755 }
1756
1757 /* next segment please */
1758 nameptr = name_end + 1;
1759 i++;
1760 }
1761
1762 (*ppname_array)[i].name = NULL;
1763
1764 return;
1765 }
1766
1767 /****************************************************************************
1768 Routine to free a namearray.
1769 ****************************************************************************/
1770
1771 void free_namearray(name_compare_entry *name_array)
1772 {
1773 int i;
1774
1775 if(name_array == NULL)
1776 return;
1777
1778 for(i=0; name_array[i].name!=NULL; i++)
1779 SAFE_FREE(name_array[i].name);
1780 SAFE_FREE(name_array);
1781 }
1782
1783 #undef DBGC_CLASS
1784 #define DBGC_CLASS DBGC_LOCKING
1785
1786 /****************************************************************************
1787 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1788 is dealt with in posix.c
1789 Returns True if we have information regarding this lock region (and returns
1790 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1791 ****************************************************************************/
1792
1793 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
1794 {
1795 SMB_STRUCT_FLOCK lock;
1796 int ret;
1797
1798 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1799 fd,(double)*poffset,(double)*pcount,*ptype));
1800
1801 lock.l_type = *ptype;
1802 lock.l_whence = SEEK_SET;
1803 lock.l_start = *poffset;
1804 lock.l_len = *pcount;
1805 lock.l_pid = 0;
1806
1807 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
1808
1809 if (ret == -1) {
1810 int sav = errno;
1811 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1812 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1813 errno = sav;
1814 return False;
1815 }
1816
1817 *ptype = lock.l_type;
1818 *poffset = lock.l_start;
1819 *pcount = lock.l_len;
1820 *ppid = lock.l_pid;
1821
1822 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1823 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1824 return True;
1825 }
1826
1827 #undef DBGC_CLASS
1828 #define DBGC_CLASS DBGC_ALL
1829
1830 /*******************************************************************
1831 Is the name specified one of my netbios names.
1832 Returns true if it is equal, false otherwise.
1833 ********************************************************************/
1834
1835 bool is_myname(const char *s)
1836 {
1837 int n;
1838 bool ret = False;
1839
1840 for (n=0; my_netbios_names(n); n++) {
1841 if (strequal(my_netbios_names(n), s)) {
1842 ret=True;
1843 break;
1844 }
1845 }
1846 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1847 return(ret);
1848 }
1849
1850 /*******************************************************************
1851 Is the name specified our workgroup/domain.
1852 Returns true if it is equal, false otherwise.
1853 ********************************************************************/
1854
1855 bool is_myworkgroup(const char *s)
1856 {
1857 bool ret = False;
1858
1859 if (strequal(s, lp_workgroup())) {
1860 ret=True;
1861 }
1862
1863 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1864 return(ret);
1865 }
1866
1867 /*******************************************************************
1868 we distinguish between 2K and XP by the "Native Lan Manager" string
1869 WinXP => "Windows 2002 5.1"
1870 WinXP 64bit => "Windows XP 5.2"
1871 Win2k => "Windows 2000 5.0"
1872 NT4 => "Windows NT 4.0"
1873 Win9x => "Windows 4.0"
1874 Windows 2003 doesn't set the native lan manager string but
1875 they do set the domain to "Windows 2003 5.2" (probably a bug).
1876 ********************************************************************/
1877
1878 void ra_lanman_string( const char *native_lanman )
1879 {
1880 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1881 set_remote_arch( RA_WINXP );
1882 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1883 set_remote_arch( RA_WINXP64 );
1884 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1885 set_remote_arch( RA_WIN2K3 );
1886 }
1887
1888 static const char *remote_arch_str;
1889
1890 const char *get_remote_arch_str(void)
1891 {
1892 if (!remote_arch_str) {
1893 return "UNKNOWN";
1894 }
1895 return remote_arch_str;
1896 }
1897
1898 /*******************************************************************
1899 Set the horrid remote_arch string based on an enum.
1900 ********************************************************************/
1901
1902 void set_remote_arch(enum remote_arch_types type)
1903 {
1904 ra_type = type;
1905 switch( type ) {
1906 case RA_WFWG:
1907 remote_arch_str = "WfWg";
1908 break;
1909 case RA_OS2:
1910 remote_arch_str = "OS2";
1911 break;
1912 case RA_WIN95:
1913 remote_arch_str = "Win95";
1914 break;
1915 case RA_WINNT:
1916 remote_arch_str = "WinNT";
1917 break;
1918 case RA_WIN2K:
1919 remote_arch_str = "Win2K";
1920 break;
1921 case RA_WINXP:
1922 remote_arch_str = "WinXP";
1923 break;
1924 case RA_WINXP64:
1925 remote_arch_str = "WinXP64";
1926 break;
1927 case RA_WIN2K3:
1928 remote_arch_str = "Win2K3";
1929 break;
1930 case RA_VISTA:
1931 remote_arch_str = "Vista";
1932 break;
1933 case RA_SAMBA:
1934 remote_arch_str = "Samba";
1935 break;
1936 case RA_CIFSFS:
1937 remote_arch_str = "CIFSFS";
1938 break;
1939 default:
1940 ra_type = RA_UNKNOWN;
1941 remote_arch_str = "UNKNOWN";
1942 break;
1943 }
1944
1945 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1946 remote_arch_str));
1947 }
1948
1949 /*******************************************************************
1950 Get the remote_arch type.
1951 ********************************************************************/
1952
1953 enum remote_arch_types get_remote_arch(void)
1954 {
1955 return ra_type;
1956 }
1957
1958 const char *tab_depth(int level, int depth)
1959 {
1960 if( CHECK_DEBUGLVL(level) ) {
1961 dbgtext("%*s", depth*4, "");
1962 }
1963 return "";
1964 }
1965
1966 /*****************************************************************************
1967 Provide a checksum on a string
1968
1969 Input: s - the null-terminated character string for which the checksum
1970 will be calculated.
1971
1972 Output: The checksum value calculated for s.
1973 *****************************************************************************/
1974
1975 int str_checksum(const char *s)
1976 {
1977 int res = 0;
1978 int c;
1979 int i=0;
1980
1981 while(*s) {
1982 c = *s;
1983 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
1984 s++;
1985 i++;
1986 }
1987 return(res);
1988 }
1989
1990 /*****************************************************************
1991 Zero a memory area then free it. Used to catch bugs faster.
1992 *****************************************************************/
1993
1994 void zero_free(void *p, size_t size)
1995 {
1996 memset(p, 0, size);
1997 SAFE_FREE(p);
1998 }
1999
2000 /*****************************************************************
2001 Set our open file limit to a requested max and return the limit.
2002 *****************************************************************/
2003
2004 int set_maxfiles(int requested_max)
2005 {
2006 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2007 struct rlimit rlp;
2008 int saved_current_limit;
2009
2010 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2011 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2012 strerror(errno) ));
2013 /* just guess... */
2014 return requested_max;
2015 }
2016
2017 /*
2018 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2019 * account for the extra fd we need
2020 * as well as the log files and standard
2021 * handles etc. Save the limit we want to set in case
2022 * we are running on an OS that doesn't support this limit (AIX)
2023 * which always returns RLIM_INFINITY for rlp.rlim_max.
2024 */
2025
2026 /* Try raising the hard (max) limit to the requested amount. */
2027
2028 #if defined(RLIM_INFINITY)
2029 if (rlp.rlim_max != RLIM_INFINITY) {
2030 int orig_max = rlp.rlim_max;
2031
2032 if ( rlp.rlim_max < requested_max )
2033 rlp.rlim_max = requested_max;
2034
2035 /* This failing is not an error - many systems (Linux) don't
2036 support our default request of 10,000 open files. JRA. */
2037
2038 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2039 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2040 (int)rlp.rlim_max, strerror(errno) ));
2041
2042 /* Set failed - restore original value from get. */
2043 rlp.rlim_max = orig_max;
2044 }
2045 }
2046 #endif
2047
2048 /* Now try setting the soft (current) limit. */
2049
2050 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2051
2052 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2053 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2054 (int)rlp.rlim_cur, strerror(errno) ));
2055 /* just guess... */
2056 return saved_current_limit;
2057 }
2058
2059 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2060 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2061 strerror(errno) ));
2062 /* just guess... */
2063 return saved_current_limit;
2064 }
2065
2066 #if defined(RLIM_INFINITY)
2067 if(rlp.rlim_cur == RLIM_INFINITY)
2068 return saved_current_limit;
2069 #endif
2070
2071 if((int)rlp.rlim_cur > saved_current_limit)
2072 return saved_current_limit;
2073
2074 return rlp.rlim_cur;
2075 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2076 /*
2077 * No way to know - just guess...
2078 */
2079 return requested_max;
2080 #endif
2081 }
2082
2083 /*****************************************************************
2084 malloc that aborts with smb_panic on fail or zero size.
2085 *****************************************************************/
2086
2087 void *smb_xmalloc_array(size_t size, unsigned int count)
2088 {
2089 void *p;
2090 if (size == 0) {
2091 smb_panic("smb_xmalloc_array: called with zero size");
2092 }
2093 if (count >= MAX_ALLOC_SIZE/size) {
2094 smb_panic("smb_xmalloc_array: alloc size too large");
2095 }
2096 if ((p = SMB_MALLOC(size*count)) == NULL) {
2097 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2098 (unsigned long)size, (unsigned long)count));
2099 smb_panic("smb_xmalloc_array: malloc failed");
2100 }
2101 return p;
2102 }
2103
2104 /*
2105 vasprintf that aborts on malloc fail
2106 */
2107
2108 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2109 {
2110 int n;
2111 va_list ap2;
2112
2113 va_copy(ap2, ap);
2114
2115 n = vasprintf(ptr, format, ap2);
2116 va_end(ap2);
2117 if (n == -1 || ! *ptr) {
2118 smb_panic("smb_xvasprintf: out of memory");
2119 }
2120 return n;
2121 }
2122
2123 /*****************************************************************
2124 Get local hostname and cache result.
2125 *****************************************************************/
2126
2127 char *myhostname(void)
2128 {
2129 static char *ret;
2130 if (ret == NULL) {
2131 /* This is cached forever so
2132 * use talloc_autofree_context() ctx. */
2133 ret = get_myname(talloc_autofree_context());
2134 }
2135 return ret;
2136 }
2137
2138 /**
2139 * @brief Returns an absolute path to a file concatenating the provided
2140 * @a rootpath and @a basename
2141 *
2142 * @param name Filename, relative to @a rootpath
2143 *
2144 * @retval Pointer to a string containing the full path.
2145 **/
2146
2147 static char *xx_path(const char *name, const char *rootpath)
2148 {
2149 char *fname = NULL;
2150
2151 fname = talloc_strdup(talloc_tos(), rootpath);
2152 if (!fname) {
2153 return NULL;
2154 }
2155 trim_string(fname,"","/");
2156
2157 if (!directory_exist(fname)) {
2158 if (!mkdir(fname,0755))
2159 DEBUG(1, ("Unable to create directory %s for file %s. "
2160 "Error was %s\n", fname, name, strerror(errno)));
2161 }
2162
2163 return talloc_asprintf(talloc_tos(),
2164 "%s/%s",
2165 fname,
2166 name);
2167 }
2168
2169 /**
2170 * @brief Returns an absolute path to a file in the Samba lock directory.
2171 *
2172 * @param name File to find, relative to LOCKDIR.
2173 *
2174 * @retval Pointer to a talloc'ed string containing the full path.
2175 **/
2176
2177 char *lock_path(const char *name)
2178 {
2179 return xx_path(name, lp_lockdir());
2180 }
2181
2182 /**
2183 * @brief Returns an absolute path to a file in the Samba pid directory.
2184 *
2185 * @param name File to find, relative to PIDDIR.
2186 *
2187 * @retval Pointer to a talloc'ed string containing the full path.
2188 **/
2189
2190 char *pid_path(const char *name)
2191 {
2192 return xx_path(name, lp_piddir());
2193 }
2194
2195 /**
2196 * @brief Returns an absolute path to a file in the Samba lib directory.
2197 *
2198 * @param name File to find, relative to LIBDIR.
2199 *
2200 * @retval Pointer to a string containing the full path.
2201 **/
2202
2203 char *lib_path(const char *name)
2204 {
2205 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2206 }
2207
2208 /**
2209 * @brief Returns an absolute path to a file in the Samba modules directory.
2210 *
2211 * @param name File to find, relative to MODULESDIR.
2212 *
2213 * @retval Pointer to a string containing the full path.
2214 **/
2215
2216 char *modules_path(const char *name)
2217 {
2218 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2219 }
2220
2221 /**
2222 * @brief Returns an absolute path to a file in the Samba data directory.
2223 *
2224 * @param name File to find, relative to CODEPAGEDIR.
2225 *
2226 * @retval Pointer to a talloc'ed string containing the full path.
2227 **/
2228
2229 char *data_path(const char *name)
2230 {
2231 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2232 }
2233
2234 /**
2235 * @brief Returns an absolute path to a file in the Samba state directory.
2236 *
2237 * @param name File to find, relative to STATEDIR.
2238 *
2239 * @retval Pointer to a talloc'ed string containing the full path.
2240 **/
2241
2242 char *state_path(const char *name)
2243 {
2244 return xx_path(name, lp_statedir());
2245 }
2246
2247 /**
2248 * @brief Returns an absolute path to a file in the Samba cache directory.
2249 *
2250 * @param name File to find, relative to CACHEDIR.
2251 *
2252 * @retval Pointer to a talloc'ed string containing the full path.
2253 **/
2254
2255 char *cache_path(const char *name)
2256 {
2257 return xx_path(name, lp_cachedir());
2258 }
2259
2260 /**
2261 * @brief Returns the platform specific shared library extension.
2262 *
2263 * @retval Pointer to a const char * containing the extension.
2264 **/
2265
2266 const char *shlib_ext(void)
2267 {
2268 return get_dyn_SHLIBEXT();
2269 }
2270
2271 /*******************************************************************
2272 Given a filename - get its directory name
2273 ********************************************************************/
2274
2275 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
2276 const char **name)
2277 {
2278 char *p;
2279 ptrdiff_t len;
2280
2281 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2282
2283 if (p == NULL) {
2284 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2285 return False;
2286 }
2287 if (name) {
2288 *name = "";
2289 }
2290 return True;
2291 }
2292
2293 len = p-dir;
2294
2295 if (!(*parent = (char *)TALLOC_MEMDUP(mem_ctx, dir, len+1))) {
2296 return False;
2297 }
2298 (*parent)[len] = '\0';
2299
2300 if (name) {
2301 *name = p+1;
2302 }
2303 return True;
2304 }
2305
2306 /*******************************************************************
2307 Determine if a pattern contains any Microsoft wildcard characters.
2308 *******************************************************************/
2309
2310 bool ms_has_wild(const char *s)
2311 {
2312 char c;
2313
2314 if (lp_posix_pathnames()) {
2315 /* With posix pathnames no characters are wild. */
2316 return False;
2317 }
2318
2319 while ((c = *s++)) {
2320 switch (c) {
2321 case '*':
2322 case '?':
2323 case '<':
2324 case '>':
2325 case '"':
2326 return True;
2327 }
2328 }
2329 return False;
2330 }
2331
2332 bool ms_has_wild_w(const smb_ucs2_t *s)
2333 {
2334 smb_ucs2_t c;
2335 if (!s) return False;
2336 while ((c = *s++)) {
2337 switch (c) {
2338 case UCS2_CHAR('*'):
2339 case UCS2_CHAR('?'):
2340 case UCS2_CHAR('<'):
2341 case UCS2_CHAR('>'):
2342 case UCS2_CHAR('"'):
2343 return True;
2344 }
2345 }
2346 return False;
2347 }
2348
2349 /*******************************************************************
2350 A wrapper that handles case sensitivity and the special handling
2351 of the ".." name.
2352 *******************************************************************/
2353
2354 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2355 {
2356 if (strcmp(string,"..") == 0)
2357 string = ".";
2358 if (strcmp(pattern,".") == 0)
2359 return False;
2360
2361 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2362 }
2363
2364 /*******************************************************************
2365 A wrapper that handles case sensitivity and the special handling
2366 of the ".." name. Varient that is only called by old search code which requires
2367 pattern translation.
2368 *******************************************************************/
2369
2370 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2371 {
2372 if (strcmp(string,"..") == 0)
2373 string = ".";
2374 if (strcmp(pattern,".") == 0)
2375 return False;
2376
2377 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2378 }
2379
2380 /*******************************************************************
2381 A wrapper that handles a list of patters and calls mask_match()
2382 on each. Returns True if any of the patterns match.
2383 *******************************************************************/
2384
2385 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2386 {
2387 while (listLen-- > 0) {
2388 if (mask_match(string, *list++, is_case_sensitive))
2389 return True;
2390 }
2391 return False;
2392 }
2393
2394 /*********************************************************
2395 Recursive routine that is called by unix_wild_match.
2396 *********************************************************/
2397
2398 static bool unix_do_match(const char *regexp, const char *str)
2399 {
2400 const char *p;
2401
2402 for( p = regexp; *p && *str; ) {
2403
2404 switch(*p) {
2405 case '?':
2406 str++;
2407 p++;
2408 break;
2409
2410 case '*':
2411
2412 /*
2413 * Look for a character matching
2414 * the one after the '*'.
2415 */
2416 p++;
2417 if(!*p)
2418 return true; /* Automatic match */
2419 while(*str) {
2420
2421 while(*str && (*p != *str))
2422 str++;
2423
2424 /*
2425 * Patch from weidel@multichart.de. In the case of the regexp
2426 * '*XX*' we want to ensure there are at least 2 'X' characters
2427 * in the string after the '*' for a match to be made.
2428 */
2429
2430 {
2431 int matchcount=0;
2432
2433 /*
2434 * Eat all the characters that match, but count how many there were.
2435 */
2436
2437 while(*str && (*p == *str)) {
2438 str++;
2439 matchcount++;
2440 }
2441
2442 /*
2443 * Now check that if the regexp had n identical characters that
2444 * matchcount had at least that many matches.
2445 */
2446
2447 while ( *(p+1) && (*(p+1) == *p)) {
2448 p++;
2449 matchcount--;
2450 }
2451
2452 if ( matchcount <= 0 )
2453 return false;
2454 }
2455
2456 str--; /* We've eaten the match char after the '*' */
2457
2458 if(unix_do_match(p, str))
2459 return true;
2460
2461 if(!*str)
2462 return false;
2463 else
2464 str++;
2465 }
2466 return false;
2467
2468 default:
2469 if(*str != *p)
2470 return false;
2471 str++;
2472 p++;
2473 break;
2474 }
2475 }
2476
2477 if(!*p && !*str)
2478 return true;
2479
2480 if (!*p && str[0] == '.' && str[1] == 0)
2481 return true;
2482
2483 if (!*str && *p == '?') {
2484 while (*p == '?')
2485 p++;
2486 return(!*p);
2487 }
2488
2489 if(!*str && (*p == '*' && p[1] == '\0'))
2490 return true;
2491
2492 return false;
2493 }
2494
2495 /*******************************************************************
2496 Simple case insensitive interface to a UNIX wildcard matcher.
2497 Returns True if match, False if not.
2498 *******************************************************************/
2499
2500 bool unix_wild_match(const char *pattern, const char *string)
2501 {
2502 TALLOC_CTX *ctx = talloc_stackframe();
2503 char *p2;
2504 char *s2;
2505 char *p;
2506 bool ret = false;
2507
2508 p2 = talloc_strdup(ctx,pattern);
2509 s2 = talloc_strdup(ctx,string);
2510 if (!p2 || !s2) {
2511 TALLOC_FREE(ctx);
2512 return false;
2513 }
2514 strlower_m(p2);
2515 strlower_m(s2);
2516
2517 /* Remove any *? and ** from the pattern as they are meaningless */
2518 for(p = p2; *p; p++) {
2519 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2520 memmove(&p[1], &p[2], strlen(&p[2])+1);
2521 }
2522 }
2523
2524 if (strequal(p2,"*")) {
2525 TALLOC_FREE(ctx);
2526 return true;
2527 }
2528
2529 ret = unix_do_match(p2, s2);
2530 TALLOC_FREE(ctx);
2531 return ret;
2532 }
2533
2534 /**********************************************************************
2535 Converts a name to a fully qualified domain name.
2536 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2537 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2538 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2539 ***********************************************************************/
2540
2541 bool name_to_fqdn(fstring fqdn, const char *name)
2542 {
2543 char *full = NULL;
2544 struct hostent *hp = gethostbyname(name);
2545
2546 if (!hp || !hp->h_name || !*hp->h_name) {
2547 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2548 fstrcpy(fqdn, name);
2549 return false;
2550 }
2551
2552 /* Find out if the fqdn is returned as an alias
2553 * to cope with /etc/hosts files where the first
2554 * name is not the fqdn but the short name */
2555 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2556 int i;
2557 for (i = 0; hp->h_aliases[i]; i++) {
2558 if (strchr_m(hp->h_aliases[i], '.')) {
2559 full = hp->h_aliases[i];
2560 break;
2561 }
2562 }
2563 }
2564 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2565 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2566 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2567 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2568 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2569 full = hp->h_name;
2570 }
2571 if (!full) {
2572 full = hp->h_name;
2573 }
2574
2575 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2576 fstrcpy(fqdn, full);
2577 return true;
2578 }
2579
2580 /**********************************************************************
2581 Append a DATA_BLOB to a talloc'ed object
2582 ***********************************************************************/
2583
2584 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
2585 {
2586 size_t old_size = 0;
2587 char *result;
2588
2589 if (blob.length == 0) {
2590 return buf;
2591 }
2592
2593 if (buf != NULL) {
2594 old_size = talloc_get_size(buf);
2595 }
2596
2597 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
2598 if (result == NULL) {
2599 return NULL;
2600 }
2601
2602 memcpy(result + old_size, blob.data, blob.length);
2603 return result;
2604 }
2605
2606 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2607 {
2608 switch (share_access & ~FILE_SHARE_DELETE) {
2609 case FILE_SHARE_NONE:
2610 return DENY_ALL;
2611 case FILE_SHARE_READ:
2612 return DENY_WRITE;
2613 case FILE_SHARE_WRITE:
2614 return DENY_READ;
2615 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2616 return DENY_NONE;
2617 }
2618 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2619 return DENY_DOS;
2620 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2621 return DENY_FCB;
2622 }
2623
2624 return (uint32)-1;
2625 }
2626
2627 pid_t procid_to_pid(const struct server_id *proc)
2628 {
2629 return proc->pid;
2630 }
2631
2632 static uint32 my_vnn = NONCLUSTER_VNN;
2633
2634 void set_my_vnn(uint32 vnn)
2635 {
2636 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
2637 my_vnn = vnn;
2638 }
2639
2640 uint32 get_my_vnn(void)
2641 {
2642 return my_vnn;
2643 }
2644
2645 struct server_id pid_to_procid(pid_t pid)
2646 {
2647 struct server_id result;
2648 result.pid = pid;
2649 #ifdef CLUSTER_SUPPORT
2650 result.vnn = my_vnn;
2651 #endif
2652 return result;
2653 }
2654
2655 struct server_id procid_self(void)
2656 {
2657 return pid_to_procid(sys_getpid());
2658 }
2659
2660 struct server_id server_id_self(void)
2661 {
2662 return procid_self();
2663 }
2664
2665 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
2666 {
2667 if (p1->pid != p2->pid)
2668 return False;
2669 #ifdef CLUSTER_SUPPORT
2670 if (p1->vnn != p2->vnn)
2671 return False;
2672 #endif
2673 return True;
2674 }
2675
2676 bool cluster_id_equal(const struct server_id *id1,
2677 const struct server_id *id2)
2678 {
2679 return procid_equal(id1, id2);
2680 }
2681
2682 bool procid_is_me(const struct server_id *pid)
2683 {
2684 if (pid->pid != sys_getpid())
2685 return False;
2686 #ifdef CLUSTER_SUPPORT
2687 if (pid->vnn != my_vnn)
2688 return False;
2689 #endif
2690 return True;
2691 }
2692
2693 struct server_id interpret_pid(const char *pid_string)
2694 {
2695 #ifdef CLUSTER_SUPPORT
2696 unsigned int vnn, pid;
2697 struct server_id result;
2698 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
2699 result.vnn = vnn;
2700 result.pid = pid;
2701 }
2702 else if (sscanf(pid_string, "%u", &pid) == 1) {
2703 result.vnn = get_my_vnn();
2704 result.pid = pid;
2705 }
2706 else {
2707 result.vnn = NONCLUSTER_VNN;
2708 result.pid = -1;
2709 }
2710 return result;
2711 #else
2712 return pid_to_procid(atoi(pid_string));
2713 #endif
2714 }
2715
2716 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
2717 {
2718 #ifdef CLUSTER_SUPPORT
2719 if (pid->vnn == NONCLUSTER_VNN) {
2720 return talloc_asprintf(mem_ctx,
2721 "%d",
2722 (int)pid->pid);
2723 }
2724 else {
2725 return talloc_asprintf(mem_ctx,
2726 "%u:%d",
2727 (unsigned)pid->vnn,
2728 (int)pid->pid);
2729 }
2730 #else
2731 return talloc_asprintf(mem_ctx,
2732 "%d",
2733 (int)pid->pid);
2734 #endif
2735 }
2736
2737 char *procid_str_static(const struct server_id *pid)
2738 {
2739 return procid_str(talloc_tos(), pid);
2740 }
2741
2742 bool procid_valid(const struct server_id *pid)
2743 {
2744 return (pid->pid != -1);
2745 }
2746
2747 bool procid_is_local(const struct server_id *pid)
2748 {
2749 #ifdef CLUSTER_SUPPORT
2750 return pid->vnn == my_vnn;
2751 #else
2752 return True;
2753 #endif
2754 }
2755
2756 int this_is_smp(void)
2757 {
2758 #if defined(HAVE_SYSCONF)
2759
2760 #if defined(SYSCONF_SC_NPROC_ONLN)
2761 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
2762 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
2763 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
2764 #else
2765 return 0;
2766 #endif
2767
2768 #else
2769 return 0;
2770 #endif
2771 }
2772
2773 /****************************************************************
2774 Check if offset/length fit into bufsize. Should probably be
2775 merged with is_offset_safe, but this would require a rewrite
2776 of lanman.c. Later :-)
2777 ****************************************************************/
2778
2779 bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
2780 {
2781 if ((offset + length < offset) || (offset + length < length)) {
2782 /* wrap */
2783 return true;
2784 }
2785 if ((offset > bufsize) || (offset + length > bufsize)) {
2786 /* overflow */
2787 return true;
2788 }
2789 return false;
2790 }
2791
2792 /****************************************************************
2793 Check if an offset into a buffer is safe.
2794 If this returns True it's safe to indirect into the byte at
2795 pointer ptr+off.
2796 ****************************************************************/
2797
2798 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2799 {
2800 const char *end_base = buf_base + buf_len;
2801 char *end_ptr = ptr + off;
2802
2803 if (!buf_base || !ptr) {
2804 return False;
2805 }
2806
2807 if (end_base < buf_base || end_ptr < ptr) {
2808 return False; /* wrap. */
2809 }
2810
2811 if (end_ptr < end_base) {
2812 return True;
2813 }
2814 return False;
2815 }
2816
2817 /****************************************************************
2818 Return a safe pointer into a buffer, or NULL.
2819 ****************************************************************/
2820
2821 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2822 {
2823 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2824 ptr + off : NULL;
2825 }
2826
2827 /****************************************************************
2828 Return a safe pointer into a string within a buffer, or NULL.
2829 ****************************************************************/
2830
2831 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2832 {
2833 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2834 return NULL;
2835 }
2836 /* Check if a valid string exists at this offset. */
2837 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2838 return NULL;
2839 }
2840 return ptr + off;
2841 }
2842
2843 /****************************************************************
2844 Return an SVAL at a pointer, or failval if beyond the end.
2845 ****************************************************************/
2846
2847 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2848 {
2849 /*
2850 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2851 * NOT ptr[2].
2852 */
2853 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2854 return failval;
2855 }
2856 return SVAL(ptr,off);
2857 }
2858
2859 /****************************************************************
2860 Return an IVAL at a pointer, or failval if beyond the end.
2861 ****************************************************************/
2862
2863 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2864 {
2865 /*
2866 * Note we use off+3 here, not off+4 as IVAL accesses
2867 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2868 */
2869 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2870 return failval;
2871 }
2872 return IVAL(ptr,off);
2873 }
2874
2875 /****************************************************************
2876 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2877 call (they take care of winbind separator and other winbind specific settings).
2878 ****************************************************************/
2879
2880 void split_domain_user(TALLOC_CTX *mem_ctx,
2881 const char *full_name,
2882 char **domain,
2883 char **user)
2884 {
2885 const char *p = NULL;
2886
2887 p = strchr_m(full_name, '\\');
2888
2889 if (p != NULL) {
2890 *domain = talloc_strndup(mem_ctx, full_name,
2891 PTR_DIFF(p, full_name));
2892 *user = talloc_strdup(mem_ctx, p+1);
2893 } else {
2894 *domain = talloc_strdup(mem_ctx, "");
2895 *user = talloc_strdup(mem_ctx, full_name);
2896 }
2897 }
2898
2899 #if 0
2900
2901 Disable these now we have checked all code paths and ensured
2902 NULL returns on zero request. JRA.
2903
2904 /****************************************************************
2905 talloc wrapper functions that guarentee a null pointer return
2906 if size == 0.
2907 ****************************************************************/
2908
2909 #ifndef MAX_TALLOC_SIZE
2910 #define MAX_TALLOC_SIZE 0x10000000
2911 #endif
2912
2913 /*
2914 * talloc and zero memory.
2915 * - returns NULL if size is zero.
2916 */
2917
2918 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
2919 {
2920 void *p;
2921
2922 if (size == 0) {
2923 return NULL;
2924 }
2925
2926 p = talloc_named_const(ctx, size, name);
2927
2928 if (p) {
2929 memset(p, '\0', size);
2930 }
2931
2932 return p;
2933 }
2934
2935 /*
2936 * memdup with a talloc.
2937 * - returns NULL if size is zero.
2938 */
2939
2940 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
2941 {
2942 void *newp;
2943
2944 if (size == 0) {
2945 return NULL;
2946 }
2947
2948 newp = talloc_named_const(t, size, name);
2949 if (newp) {
2950 memcpy(newp, p, size);
2951 }
2952
2953 return newp;
2954 }
2955
2956 /*
2957 * alloc an array, checking for integer overflow in the array size.
2958 * - returns NULL if count or el_size are zero.
2959 */
2960
2961 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2962 {
2963 if (count >= MAX_TALLOC_SIZE/el_size) {
2964 return NULL;
2965 }
2966
2967 if (el_size == 0 || count == 0) {
2968 return NULL;
2969 }
2970
2971 return talloc_named_const(ctx, el_size * count, name);
2972 }
2973
2974 /*
2975 * alloc an zero array, checking for integer overflow in the array size
2976 * - returns NULL if count or el_size are zero.
2977 */
2978
2979 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2980 {
2981 if (count >= MAX_TALLOC_SIZE/el_size) {
2982 return NULL;
2983 }
2984
2985 if (el_size == 0 || count == 0) {
2986 return NULL;
2987 }
2988
2989 return _talloc_zero(ctx, el_size * count, name);
2990 }
2991
2992 /*
2993 * Talloc wrapper that returns NULL if size == 0.
2994 */
2995 void *talloc_zeronull(const void *context, size_t size, const char *name)
2996 {
2997 if (size == 0) {
2998 return NULL;
2999 }
3000 return talloc_named_const(context, size, name);
3001 }
3002 #endif
3003
3004 /* Split a path name into filename and stream name components. Canonicalise
3005 * such that an implicit $DATA token is always explicit.
3006 *
3007 * The "specification" of this function can be found in the
3008 * run_local_stream_name() function in torture.c, I've tried those
3009 * combinations against a W2k3 server.
3010 */
3011
3012 NTSTATUS split_ntfs_stream_name(TALLOC_CTX *mem_ctx, const char *fname,
3013 char **pbase, char **pstream)
3014 {
3015 char *base = NULL;
3016 char *stream = NULL;
3017 char *sname; /* stream name */
3018 const char *stype; /* stream type */
3019
3020 DEBUG(10, ("split_ntfs_stream_name called for [%s]\n", fname));
3021
3022 sname = strchr_m(fname, ':');
3023
3024 if (lp_posix_pathnames() || (sname == NULL)) {
3025 if (pbase != NULL) {
3026 base = talloc_strdup(mem_ctx, fname);
3027 NT_STATUS_HAVE_NO_MEMORY(base);
3028 }
3029 goto done;
3030 }
3031
3032 if (pbase != NULL) {
3033 base = talloc_strndup(mem_ctx, fname, PTR_DIFF(sname, fname));
3034 NT_STATUS_HAVE_NO_MEMORY(base);
3035 }
3036
3037 sname += 1;
3038
3039 stype = strchr_m(sname, ':');
3040
3041 if (stype == NULL) {
3042 sname = talloc_strdup(mem_ctx, sname);
3043 stype = "$DATA";
3044 }
3045 else {
3046 if (StrCaseCmp(stype, ":$DATA") != 0) {
3047 /*
3048 * If there is an explicit stream type, so far we only
3049 * allow $DATA. Is there anything else allowed? -- vl
3050 */
3051 DEBUG(10, ("[%s] is an invalid stream type\n", stype));
3052 TALLOC_FREE(base);
3053 return NT_STATUS_OBJECT_NAME_INVALID;
3054 }
3055 sname = talloc_strndup(mem_ctx, sname, PTR_DIFF(stype, sname));
3056 stype += 1;
3057 }
3058
3059 if (sname == NULL) {
3060 TALLOC_FREE(base);
3061 return NT_STATUS_NO_MEMORY;
3062 }
3063
3064 if (sname[0] == '\0') {
3065 /*
3066 * no stream name, so no stream
3067 */
3068 goto done;
3069 }
3070
3071 if (pstream != NULL) {
3072 stream = talloc_asprintf(mem_ctx, "%s:%s", sname, stype);
3073 if (stream == NULL) {
3074 TALLOC_FREE(sname);
3075 TALLOC_FREE(base);
3076 return NT_STATUS_NO_MEMORY;
3077 }
3078 /*
3079 * upper-case the type field
3080 */
3081 strupper_m(strchr_m(stream, ':')+1);
3082 }
3083
3084 done:
3085 if (pbase != NULL) {
3086 *pbase = base;
3087 }
3088 if (pstream != NULL) {
3089 *pstream = stream;
3090 }
3091 return NT_STATUS_OK;
3092 }
3093
3094 bool is_valid_policy_hnd(const struct policy_handle *hnd)
3095 {
3096 struct policy_handle tmp;
3097 ZERO_STRUCT(tmp);
3098 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
3099 }
3100
3101 bool policy_hnd_equal(const struct policy_handle *hnd1,
3102 const struct policy_handle *hnd2)
3103 {
3104 if (!hnd1 || !hnd2) {
3105 return false;
3106 }
3107
3108 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
3109 }
3110
3111 /****************************************************************
3112 strip off leading '\\' from a hostname
3113 ****************************************************************/
3114
3115 const char *strip_hostname(const char *s)
3116 {
3117 if (!s) {
3118 return NULL;
3119 }
3120
3121 if (strlen_m(s) < 3) {
3122 return s;
3123 }
3124
3125 if (s[0] == '\\') s++;
3126 if (s[0] == '\\') s++;
3127
3128 return s;
3129 }
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