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s3: re-run make samba3-idl.
[Samba/cd1.git] / source3 / lib / util.c
blobf35a55fbed54c04c8e76eff9e529d16f823e9153
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 static enum protocol_types Protocol = PROTOCOL_COREPLUS;
59
60 enum protocol_types get_Protocol(void)
61 {
62 return Protocol;
63 }
64
65 void set_Protocol(enum protocol_types p)
66 {
67 Protocol = p;
68 }
69
70 static enum remote_arch_types ra_type = RA_UNKNOWN;
71
72 /***********************************************************************
73 Definitions for all names.
74 ***********************************************************************/
75
76 static char *smb_myname;
77 static char *smb_myworkgroup;
78 static char *smb_scope;
79 static int smb_num_netbios_names;
80 static char **smb_my_netbios_names;
81
82 /***********************************************************************
83 Allocate and set myname. Ensure upper case.
84 ***********************************************************************/
85
86 bool set_global_myname(const char *myname)
87 {
88 SAFE_FREE(smb_myname);
89 smb_myname = SMB_STRDUP(myname);
90 if (!smb_myname)
91 return False;
92 strupper_m(smb_myname);
93 return True;
94 }
95
96 const char *global_myname(void)
97 {
98 return smb_myname;
99 }
100
101 /***********************************************************************
102 Allocate and set myworkgroup. Ensure upper case.
103 ***********************************************************************/
104
105 bool set_global_myworkgroup(const char *myworkgroup)
106 {
107 SAFE_FREE(smb_myworkgroup);
108 smb_myworkgroup = SMB_STRDUP(myworkgroup);
109 if (!smb_myworkgroup)
110 return False;
111 strupper_m(smb_myworkgroup);
112 return True;
113 }
114
115 const char *lp_workgroup(void)
116 {
117 return smb_myworkgroup;
118 }
119
120 /***********************************************************************
121 Allocate and set scope. Ensure upper case.
122 ***********************************************************************/
123
124 bool set_global_scope(const char *scope)
125 {
126 SAFE_FREE(smb_scope);
127 smb_scope = SMB_STRDUP(scope);
128 if (!smb_scope)
129 return False;
130 strupper_m(smb_scope);
131 return True;
132 }
133
134 /*********************************************************************
135 Ensure scope is never null string.
136 *********************************************************************/
137
138 const char *global_scope(void)
139 {
140 if (!smb_scope)
141 set_global_scope("");
142 return smb_scope;
143 }
144
145 static void free_netbios_names_array(void)
146 {
147 int i;
148
149 for (i = 0; i < smb_num_netbios_names; i++)
150 SAFE_FREE(smb_my_netbios_names[i]);
151
152 SAFE_FREE(smb_my_netbios_names);
153 smb_num_netbios_names = 0;
154 }
155
156 static bool allocate_my_netbios_names_array(size_t number)
157 {
158 free_netbios_names_array();
159
160 smb_num_netbios_names = number + 1;
161 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
162
163 if (!smb_my_netbios_names)
164 return False;
165
166 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
167 return True;
168 }
169
170 static bool set_my_netbios_names(const char *name, int i)
171 {
172 SAFE_FREE(smb_my_netbios_names[i]);
173
174 smb_my_netbios_names[i] = SMB_STRDUP(name);
175 if (!smb_my_netbios_names[i])
176 return False;
177 strupper_m(smb_my_netbios_names[i]);
178 return True;
179 }
180
181 /***********************************************************************
182 Free memory allocated to global objects
183 ***********************************************************************/
184
185 void gfree_names(void)
186 {
187 SAFE_FREE( smb_myname );
188 SAFE_FREE( smb_myworkgroup );
189 SAFE_FREE( smb_scope );
190 free_netbios_names_array();
191 free_local_machine_name();
192 }
193
194 void gfree_all( void )
195 {
196 gfree_names();
197 gfree_loadparm();
198 gfree_case_tables();
199 gfree_charcnv();
200 gfree_interfaces();
201 gfree_debugsyms();
202 }
203
204 const char *my_netbios_names(int i)
205 {
206 return smb_my_netbios_names[i];
207 }
208
209 bool set_netbios_aliases(const char **str_array)
210 {
211 size_t namecount;
212
213 /* Work out the max number of netbios aliases that we have */
214 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
215 ;
216
217 if ( global_myname() && *global_myname())
218 namecount++;
219
220 /* Allocate space for the netbios aliases */
221 if (!allocate_my_netbios_names_array(namecount))
222 return False;
223
224 /* Use the global_myname string first */
225 namecount=0;
226 if ( global_myname() && *global_myname()) {
227 set_my_netbios_names( global_myname(), namecount );
228 namecount++;
229 }
230
231 if (str_array) {
232 size_t i;
233 for ( i = 0; str_array[i] != NULL; i++) {
234 size_t n;
235 bool duplicate = False;
236
237 /* Look for duplicates */
238 for( n=0; n<namecount; n++ ) {
239 if( strequal( str_array[i], my_netbios_names(n) ) ) {
240 duplicate = True;
241 break;
242 }
243 }
244 if (!duplicate) {
245 if (!set_my_netbios_names(str_array[i], namecount))
246 return False;
247 namecount++;
248 }
249 }
250 }
251 return True;
252 }
253
254 /****************************************************************************
255 Common name initialization code.
256 ****************************************************************************/
257
258 bool init_names(void)
259 {
260 int n;
261
262 if (global_myname() == NULL || *global_myname() == '\0') {
263 if (!set_global_myname(myhostname())) {
264 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
265 return False;
266 }
267 }
268
269 if (!set_netbios_aliases(lp_netbios_aliases())) {
270 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
271 return False;
272 }
273
274 set_local_machine_name(global_myname(),false);
275
276 DEBUG( 5, ("Netbios name list:-\n") );
277 for( n=0; my_netbios_names(n); n++ ) {
278 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
279 n, my_netbios_names(n) ) );
280 }
281
282 return( True );
283 }
284
285 /**************************************************************************n
286 Code to cope with username/password auth options from the commandline.
287 Used mainly in client tools.
288 ****************************************************************************/
289
290 struct user_auth_info *user_auth_info_init(TALLOC_CTX *mem_ctx)
291 {
292 struct user_auth_info *result;
293
294 result = TALLOC_ZERO_P(mem_ctx, struct user_auth_info);
295 if (result == NULL) {
296 return NULL;
297 }
298
299 result->signing_state = Undefined;
300 return result;
301 }
302
303 const char *get_cmdline_auth_info_username(const struct user_auth_info *auth_info)
304 {
305 if (!auth_info->username) {
306 return "";
307 }
308 return auth_info->username;
309 }
310
311 void set_cmdline_auth_info_username(struct user_auth_info *auth_info,
312 const char *username)
313 {
314 TALLOC_FREE(auth_info->username);
315 auth_info->username = talloc_strdup(auth_info, username);
316 if (!auth_info->username) {
317 exit(ENOMEM);
318 }
319 }
320
321 const char *get_cmdline_auth_info_domain(const struct user_auth_info *auth_info)
322 {
323 if (!auth_info->domain) {
324 return "";
325 }
326 return auth_info->domain;
327 }
328
329 void set_cmdline_auth_info_domain(struct user_auth_info *auth_info,
330 const char *domain)
331 {
332 TALLOC_FREE(auth_info->domain);
333 auth_info->domain = talloc_strdup(auth_info, domain);
334 if (!auth_info->domain) {
335 exit(ENOMEM);
336 }
337 }
338
339 const char *get_cmdline_auth_info_password(const struct user_auth_info *auth_info)
340 {
341 if (!auth_info->password) {
342 return "";
343 }
344 return auth_info->password;
345 }
346
347 void set_cmdline_auth_info_password(struct user_auth_info *auth_info,
348 const char *password)
349 {
350 TALLOC_FREE(auth_info->password);
351 if (password == NULL) {
352 password = "";
353 }
354 auth_info->password = talloc_strdup(auth_info, password);
355 if (!auth_info->password) {
356 exit(ENOMEM);
357 }
358 auth_info->got_pass = true;
359 }
360
361 bool set_cmdline_auth_info_signing_state(struct user_auth_info *auth_info,
362 const char *arg)
363 {
364 auth_info->signing_state = -1;
365 if (strequal(arg, "off") || strequal(arg, "no") ||
366 strequal(arg, "false")) {
367 auth_info->signing_state = false;
368 } else if (strequal(arg, "on") || strequal(arg, "yes") ||
369 strequal(arg, "true") || strequal(arg, "auto")) {
370 auth_info->signing_state = true;
371 } else if (strequal(arg, "force") || strequal(arg, "required") ||
372 strequal(arg, "forced")) {
373 auth_info->signing_state = Required;
374 } else {
375 return false;
376 }
377 return true;
378 }
379
380 int get_cmdline_auth_info_signing_state(const struct user_auth_info *auth_info)
381 {
382 return auth_info->signing_state;
383 }
384
385 void set_cmdline_auth_info_use_ccache(struct user_auth_info *auth_info, bool b)
386 {
387 auth_info->use_ccache = b;
388 }
389
390 bool get_cmdline_auth_info_use_ccache(const struct user_auth_info *auth_info)
391 {
392 return auth_info->use_ccache;
393 }
394
395 void set_cmdline_auth_info_use_kerberos(struct user_auth_info *auth_info,
396 bool b)
397 {
398 auth_info->use_kerberos = b;
399 }
400
401 bool get_cmdline_auth_info_use_kerberos(const struct user_auth_info *auth_info)
402 {
403 return auth_info->use_kerberos;
404 }
405
406 void set_cmdline_auth_info_fallback_after_kerberos(struct user_auth_info *auth_info,
407 bool b)
408 {
409 auth_info->fallback_after_kerberos = b;
410 }
411
412 bool get_cmdline_auth_info_fallback_after_kerberos(const struct user_auth_info *auth_info)
413 {
414 return auth_info->fallback_after_kerberos;
415 }
416
417 /* This should only be used by lib/popt_common.c JRA */
418 void set_cmdline_auth_info_use_krb5_ticket(struct user_auth_info *auth_info)
419 {
420 auth_info->use_kerberos = true;
421 auth_info->got_pass = true;
422 }
423
424 /* This should only be used by lib/popt_common.c JRA */
425 void set_cmdline_auth_info_smb_encrypt(struct user_auth_info *auth_info)
426 {
427 auth_info->smb_encrypt = true;
428 }
429
430 void set_cmdline_auth_info_use_machine_account(struct user_auth_info *auth_info)
431 {
432 auth_info->use_machine_account = true;
433 }
434
435 bool get_cmdline_auth_info_got_pass(const struct user_auth_info *auth_info)
436 {
437 return auth_info->got_pass;
438 }
439
440 bool get_cmdline_auth_info_smb_encrypt(const struct user_auth_info *auth_info)
441 {
442 return auth_info->smb_encrypt;
443 }
444
445 bool get_cmdline_auth_info_use_machine_account(const struct user_auth_info *auth_info)
446 {
447 return auth_info->use_machine_account;
448 }
449
450 struct user_auth_info *get_cmdline_auth_info_copy(TALLOC_CTX *mem_ctx,
451 const struct user_auth_info *src)
452 {
453 struct user_auth_info *result;
454
455 result = user_auth_info_init(mem_ctx);
456 if (result == NULL) {
457 return NULL;
458 }
459
460 *result = *src;
461
462 result->username = talloc_strdup(
463 result, get_cmdline_auth_info_username(src));
464 result->password = talloc_strdup(
465 result, get_cmdline_auth_info_password(src));
466 if ((result->username == NULL) || (result->password == NULL)) {
467 TALLOC_FREE(result);
468 return NULL;
469 }
470
471 return result;
472 }
473
474 bool set_cmdline_auth_info_machine_account_creds(struct user_auth_info *auth_info)
475 {
476 char *pass = NULL;
477 char *account = NULL;
478
479 if (!get_cmdline_auth_info_use_machine_account(auth_info)) {
480 return false;
481 }
482
483 if (!secrets_init()) {
484 d_printf("ERROR: Unable to open secrets database\n");
485 return false;
486 }
487
488 if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
489 return false;
490 }
491
492 pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
493 if (!pass) {
494 d_printf("ERROR: Unable to fetch machine password for "
495 "%s in domain %s\n",
496 account, lp_workgroup());
497 SAFE_FREE(account);
498 return false;
499 }
500
501 set_cmdline_auth_info_username(auth_info, account);
502 set_cmdline_auth_info_password(auth_info, pass);
503
504 SAFE_FREE(account);
505 SAFE_FREE(pass);
506
507 return true;
508 }
509
510 /****************************************************************************
511 Ensure we have a password if one not given.
512 ****************************************************************************/
513
514 void set_cmdline_auth_info_getpass(struct user_auth_info *auth_info)
515 {
516 char *label = NULL;
517 char *pass;
518 TALLOC_CTX *frame;
519
520 if (get_cmdline_auth_info_got_pass(auth_info) ||
521 get_cmdline_auth_info_use_kerberos(auth_info)) {
522 /* Already got one... */
523 return;
524 }
525
526 frame = talloc_stackframe();
527 label = talloc_asprintf(frame, "Enter %s's password: ",
528 get_cmdline_auth_info_username(auth_info));
529 pass = getpass(label);
530 if (pass) {
531 set_cmdline_auth_info_password(auth_info, pass);
532 }
533 TALLOC_FREE(frame);
534 }
535
536 /*******************************************************************
537 Check if a file exists - call vfs_file_exist for samba files.
538 ********************************************************************/
539
540 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf,
541 bool fake_dir_create_times)
542 {
543 SMB_STRUCT_STAT st;
544 if (!sbuf)
545 sbuf = &st;
546
547 if (sys_stat(fname, sbuf, fake_dir_create_times) != 0)
548 return(False);
549
550 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
551 }
552
553 /*******************************************************************
554 Check if a unix domain socket exists - call vfs_file_exist for samba files.
555 ********************************************************************/
556
557 bool socket_exist(const char *fname)
558 {
559 SMB_STRUCT_STAT st;
560 if (sys_stat(fname, &st, false) != 0)
561 return(False);
562
563 return S_ISSOCK(st.st_ex_mode);
564 }
565
566 /*******************************************************************
567 Returns the size in bytes of the named given the stat struct.
568 ********************************************************************/
569
570 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
571 {
572 return sbuf->st_ex_size;
573 }
574
575 /*******************************************************************
576 Returns the size in bytes of the named file.
577 ********************************************************************/
578
579 SMB_OFF_T get_file_size(char *file_name)
580 {
581 SMB_STRUCT_STAT buf;
582 buf.st_ex_size = 0;
583 if (sys_stat(file_name, &buf, false) != 0)
584 return (SMB_OFF_T)-1;
585 return get_file_size_stat(&buf);
586 }
587
588 /*******************************************************************
589 Return a string representing an attribute for a file.
590 ********************************************************************/
591
592 char *attrib_string(uint16 mode)
593 {
594 fstring attrstr;
595
596 attrstr[0] = 0;
597
598 if (mode & aVOLID) fstrcat(attrstr,"V");
599 if (mode & aDIR) fstrcat(attrstr,"D");
600 if (mode & aARCH) fstrcat(attrstr,"A");
601 if (mode & aHIDDEN) fstrcat(attrstr,"H");
602 if (mode & aSYSTEM) fstrcat(attrstr,"S");
603 if (mode & aRONLY) fstrcat(attrstr,"R");
604
605 return talloc_strdup(talloc_tos(), attrstr);
606 }
607
608 /*******************************************************************
609 Show a smb message structure.
610 ********************************************************************/
611
612 void show_msg(char *buf)
613 {
614 int i;
615 int bcc=0;
616
617 if (!DEBUGLVL(5))
618 return;
619
620 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
621 smb_len(buf),
622 (int)CVAL(buf,smb_com),
623 (int)CVAL(buf,smb_rcls),
624 (int)CVAL(buf,smb_reh),
625 (int)SVAL(buf,smb_err),
626 (int)CVAL(buf,smb_flg),
627 (int)SVAL(buf,smb_flg2)));
628 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
629 (int)SVAL(buf,smb_tid),
630 (int)SVAL(buf,smb_pid),
631 (int)SVAL(buf,smb_uid),
632 (int)SVAL(buf,smb_mid)));
633 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
634
635 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
636 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
637 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
638
639 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
640
641 DEBUGADD(5,("smb_bcc=%d\n",bcc));
642
643 if (DEBUGLEVEL < 10)
644 return;
645
646 if (DEBUGLEVEL < 50)
647 bcc = MIN(bcc, 512);
648
649 dump_data(10, (uint8 *)smb_buf(buf), bcc);
650 }
651
652 /*******************************************************************
653 Set the length and marker of an encrypted smb packet.
654 ********************************************************************/
655
656 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
657 {
658 _smb_setlen(buf,len);
659
660 SCVAL(buf,4,0xFF);
661 SCVAL(buf,5,'E');
662 SSVAL(buf,6,enc_ctx_num);
663 }
664
665 /*******************************************************************
666 Set the length and marker of an smb packet.
667 ********************************************************************/
668
669 void smb_setlen(char *buf,int len)
670 {
671 _smb_setlen(buf,len);
672
673 SCVAL(buf,4,0xFF);
674 SCVAL(buf,5,'S');
675 SCVAL(buf,6,'M');
676 SCVAL(buf,7,'B');
677 }
678
679 /*******************************************************************
680 Setup only the byte count for a smb message.
681 ********************************************************************/
682
683 int set_message_bcc(char *buf,int num_bytes)
684 {
685 int num_words = CVAL(buf,smb_wct);
686 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
687 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
688 return (smb_size + num_words*2 + num_bytes);
689 }
690
691 /*******************************************************************
692 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
693 Return the bytes added
694 ********************************************************************/
695
696 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
697 {
698 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
699 uint8 *tmp;
700
701 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
702 DEBUG(0, ("talloc failed\n"));
703 return -1;
704 }
705 *outbuf = tmp;
706
707 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
708 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
709 return blob.length;
710 }
711
712 /*******************************************************************
713 Reduce a file name, removing .. elements.
714 ********************************************************************/
715
716 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
717 {
718 char *p = NULL;
719 char *str = NULL;
720
721 DEBUG(3,("dos_clean_name [%s]\n",s));
722
723 /* remove any double slashes */
724 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
725 if (!str) {
726 return NULL;
727 }
728
729 /* Remove leading .\\ characters */
730 if(strncmp(str, ".\\", 2) == 0) {
731 trim_string(str, ".\\", NULL);
732 if(*str == 0) {
733 str = talloc_strdup(ctx, ".\\");
734 if (!str) {
735 return NULL;
736 }
737 }
738 }
739
740 while ((p = strstr_m(str,"\\..\\")) != NULL) {
741 char *s1;
742
743 *p = 0;
744 s1 = p+3;
745
746 if ((p=strrchr_m(str,'\\')) != NULL) {
747 *p = 0;
748 } else {
749 *str = 0;
750 }
751 str = talloc_asprintf(ctx,
752 "%s%s",
753 str,
754 s1);
755 if (!str) {
756 return NULL;
757 }
758 }
759
760 trim_string(str,NULL,"\\..");
761 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
762 }
763
764 /*******************************************************************
765 Reduce a file name, removing .. elements.
766 ********************************************************************/
767
768 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
769 {
770 char *p = NULL;
771 char *str = NULL;
772
773 DEBUG(3,("unix_clean_name [%s]\n",s));
774
775 /* remove any double slashes */
776 str = talloc_all_string_sub(ctx, s, "//","/");
777 if (!str) {
778 return NULL;
779 }
780
781 /* Remove leading ./ characters */
782 if(strncmp(str, "./", 2) == 0) {
783 trim_string(str, "./", NULL);
784 if(*str == 0) {
785 str = talloc_strdup(ctx, "./");
786 if (!str) {
787 return NULL;
788 }
789 }
790 }
791
792 while ((p = strstr_m(str,"/../")) != NULL) {
793 char *s1;
794
795 *p = 0;
796 s1 = p+3;
797
798 if ((p=strrchr_m(str,'/')) != NULL) {
799 *p = 0;
800 } else {
801 *str = 0;
802 }
803 str = talloc_asprintf(ctx,
804 "%s%s",
805 str,
806 s1);
807 if (!str) {
808 return NULL;
809 }
810 }
811
812 trim_string(str,NULL,"/..");
813 return talloc_all_string_sub(ctx, str, "/./", "/");
814 }
815
816 char *clean_name(TALLOC_CTX *ctx, const char *s)
817 {
818 char *str = dos_clean_name(ctx, s);
819 if (!str) {
820 return NULL;
821 }
822 return unix_clean_name(ctx, str);
823 }
824
825 /*******************************************************************
826 Write data into an fd at a given offset. Ignore seek errors.
827 ********************************************************************/
828
829 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
830 {
831 size_t total=0;
832 ssize_t ret;
833
834 if (pos == (SMB_OFF_T)-1) {
835 return write_data(fd, buffer, N);
836 }
837 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
838 while (total < N) {
839 ret = sys_pwrite(fd,buffer + total,N - total, pos);
840 if (ret == -1 && errno == ESPIPE) {
841 return write_data(fd, buffer + total,N - total);
842 }
843 if (ret == -1) {
844 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
845 return -1;
846 }
847 if (ret == 0) {
848 return total;
849 }
850 total += ret;
851 pos += ret;
852 }
853 return (ssize_t)total;
854 #else
855 /* Use lseek and write_data. */
856 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
857 if (errno != ESPIPE) {
858 return -1;
859 }
860 }
861 return write_data(fd, buffer, N);
862 #endif
863 }
864
865 /*******************************************************************
866 Sleep for a specified number of milliseconds.
867 ********************************************************************/
868
869 void smb_msleep(unsigned int t)
870 {
871 #if defined(HAVE_NANOSLEEP)
872 struct timespec tval;
873 int ret;
874
875 tval.tv_sec = t/1000;
876 tval.tv_nsec = 1000000*(t%1000);
877
878 do {
879 errno = 0;
880 ret = nanosleep(&tval, &tval);
881 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
882 #else
883 unsigned int tdiff=0;
884 struct timeval tval,t1,t2;
885 fd_set fds;
886
887 GetTimeOfDay(&t1);
888 t2 = t1;
889
890 while (tdiff < t) {
891 tval.tv_sec = (t-tdiff)/1000;
892 tval.tv_usec = 1000*((t-tdiff)%1000);
893
894 /* Never wait for more than 1 sec. */
895 if (tval.tv_sec > 1) {
896 tval.tv_sec = 1;
897 tval.tv_usec = 0;
898 }
899
900 FD_ZERO(&fds);
901 errno = 0;
902 sys_select_intr(0,&fds,NULL,NULL,&tval);
903
904 GetTimeOfDay(&t2);
905 if (t2.tv_sec < t1.tv_sec) {
906 /* Someone adjusted time... */
907 t1 = t2;
908 }
909
910 tdiff = TvalDiff(&t1,&t2);
911 }
912 #endif
913 }
914
915 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
916 struct event_context *ev_ctx,
917 bool parent_longlived)
918 {
919 NTSTATUS status = NT_STATUS_OK;
920
921 /* Reset the state of the random
922 * number generation system, so
923 * children do not get the same random
924 * numbers as each other */
925 set_need_random_reseed();
926
927 /* tdb needs special fork handling */
928 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
929 DEBUG(0,("tdb_reopen_all failed.\n"));
930 status = NT_STATUS_OPEN_FAILED;
931 goto done;
932 }
933
934 if (ev_ctx) {
935 event_context_reinit(ev_ctx);
936 }
937
938 if (msg_ctx) {
939 /*
940 * For clustering, we need to re-init our ctdbd connection after the
941 * fork
942 */
943 status = messaging_reinit(msg_ctx);
944 if (!NT_STATUS_IS_OK(status)) {
945 DEBUG(0,("messaging_reinit() failed: %s\n",
946 nt_errstr(status)));
947 }
948 }
949 done:
950 return status;
951 }
952
953 #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 char *nameptr = (char *)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 /* anything left? */
1715 if ( *nameptr == '\0' )
1716 break;
1717
1718 /* find the next '/' or consume remaining */
1719 name_end = strchr_m(nameptr, '/');
1720 if (name_end == NULL)
1721 name_end = (char *)nameptr + strlen(nameptr);
1722
1723 /* next segment please */
1724 nameptr = name_end + 1;
1725 num_entries++;
1726 }
1727
1728 if(num_entries == 0)
1729 return;
1730
1731 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1732 DEBUG(0,("set_namearray: malloc fail\n"));
1733 return;
1734 }
1735
1736 /* Now copy out the names */
1737 nameptr = (char *)namelist;
1738 i = 0;
1739 while(*nameptr) {
1740 if ( *nameptr == '/' ) {
1741 /* cope with multiple (useless) /s) */
1742 nameptr++;
1743 continue;
1744 }
1745 /* anything left? */
1746 if ( *nameptr == '\0' )
1747 break;
1748
1749 /* find the next '/' or consume remaining */
1750 name_end = strchr_m(nameptr, '/');
1751 if (name_end)
1752 *name_end = '\0';
1753 else
1754 name_end = nameptr + strlen(nameptr);
1755
1756 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1757 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1758 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1759 return;
1760 }
1761
1762 /* next segment please */
1763 nameptr = name_end + 1;
1764 i++;
1765 }
1766
1767 (*ppname_array)[i].name = NULL;
1768
1769 return;
1770 }
1771
1772 /****************************************************************************
1773 Routine to free a namearray.
1774 ****************************************************************************/
1775
1776 void free_namearray(name_compare_entry *name_array)
1777 {
1778 int i;
1779
1780 if(name_array == NULL)
1781 return;
1782
1783 for(i=0; name_array[i].name!=NULL; i++)
1784 SAFE_FREE(name_array[i].name);
1785 SAFE_FREE(name_array);
1786 }
1787
1788 #undef DBGC_CLASS
1789 #define DBGC_CLASS DBGC_LOCKING
1790
1791 /****************************************************************************
1792 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1793 is dealt with in posix.c
1794 Returns True if we have information regarding this lock region (and returns
1795 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1796 ****************************************************************************/
1797
1798 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
1799 {
1800 SMB_STRUCT_FLOCK lock;
1801 int ret;
1802
1803 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1804 fd,(double)*poffset,(double)*pcount,*ptype));
1805
1806 lock.l_type = *ptype;
1807 lock.l_whence = SEEK_SET;
1808 lock.l_start = *poffset;
1809 lock.l_len = *pcount;
1810 lock.l_pid = 0;
1811
1812 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
1813
1814 if (ret == -1) {
1815 int sav = errno;
1816 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1817 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1818 errno = sav;
1819 return False;
1820 }
1821
1822 *ptype = lock.l_type;
1823 *poffset = lock.l_start;
1824 *pcount = lock.l_len;
1825 *ppid = lock.l_pid;
1826
1827 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1828 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1829 return True;
1830 }
1831
1832 #undef DBGC_CLASS
1833 #define DBGC_CLASS DBGC_ALL
1834
1835 /*******************************************************************
1836 Is the name specified one of my netbios names.
1837 Returns true if it is equal, false otherwise.
1838 ********************************************************************/
1839
1840 bool is_myname(const char *s)
1841 {
1842 int n;
1843 bool ret = False;
1844
1845 for (n=0; my_netbios_names(n); n++) {
1846 if (strequal(my_netbios_names(n), s)) {
1847 ret=True;
1848 break;
1849 }
1850 }
1851 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1852 return(ret);
1853 }
1854
1855 /*******************************************************************
1856 Is the name specified our workgroup/domain.
1857 Returns true if it is equal, false otherwise.
1858 ********************************************************************/
1859
1860 bool is_myworkgroup(const char *s)
1861 {
1862 bool ret = False;
1863
1864 if (strequal(s, lp_workgroup())) {
1865 ret=True;
1866 }
1867
1868 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1869 return(ret);
1870 }
1871
1872 /*******************************************************************
1873 we distinguish between 2K and XP by the "Native Lan Manager" string
1874 WinXP => "Windows 2002 5.1"
1875 WinXP 64bit => "Windows XP 5.2"
1876 Win2k => "Windows 2000 5.0"
1877 NT4 => "Windows NT 4.0"
1878 Win9x => "Windows 4.0"
1879 Windows 2003 doesn't set the native lan manager string but
1880 they do set the domain to "Windows 2003 5.2" (probably a bug).
1881 ********************************************************************/
1882
1883 void ra_lanman_string( const char *native_lanman )
1884 {
1885 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1886 set_remote_arch( RA_WINXP );
1887 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1888 set_remote_arch( RA_WINXP64 );
1889 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1890 set_remote_arch( RA_WIN2K3 );
1891 }
1892
1893 static const char *remote_arch_str;
1894
1895 const char *get_remote_arch_str(void)
1896 {
1897 if (!remote_arch_str) {
1898 return "UNKNOWN";
1899 }
1900 return remote_arch_str;
1901 }
1902
1903 /*******************************************************************
1904 Set the horrid remote_arch string based on an enum.
1905 ********************************************************************/
1906
1907 void set_remote_arch(enum remote_arch_types type)
1908 {
1909 ra_type = type;
1910 switch( type ) {
1911 case RA_WFWG:
1912 remote_arch_str = "WfWg";
1913 break;
1914 case RA_OS2:
1915 remote_arch_str = "OS2";
1916 break;
1917 case RA_WIN95:
1918 remote_arch_str = "Win95";
1919 break;
1920 case RA_WINNT:
1921 remote_arch_str = "WinNT";
1922 break;
1923 case RA_WIN2K:
1924 remote_arch_str = "Win2K";
1925 break;
1926 case RA_WINXP:
1927 remote_arch_str = "WinXP";
1928 break;
1929 case RA_WINXP64:
1930 remote_arch_str = "WinXP64";
1931 break;
1932 case RA_WIN2K3:
1933 remote_arch_str = "Win2K3";
1934 break;
1935 case RA_VISTA:
1936 remote_arch_str = "Vista";
1937 break;
1938 case RA_SAMBA:
1939 remote_arch_str = "Samba";
1940 break;
1941 case RA_CIFSFS:
1942 remote_arch_str = "CIFSFS";
1943 break;
1944 default:
1945 ra_type = RA_UNKNOWN;
1946 remote_arch_str = "UNKNOWN";
1947 break;
1948 }
1949
1950 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1951 remote_arch_str));
1952 }
1953
1954 /*******************************************************************
1955 Get the remote_arch type.
1956 ********************************************************************/
1957
1958 enum remote_arch_types get_remote_arch(void)
1959 {
1960 return ra_type;
1961 }
1962
1963 const char *tab_depth(int level, int depth)
1964 {
1965 if( CHECK_DEBUGLVL(level) ) {
1966 dbgtext("%*s", depth*4, "");
1967 }
1968 return "";
1969 }
1970
1971 /*****************************************************************************
1972 Provide a checksum on a string
1973
1974 Input: s - the null-terminated character string for which the checksum
1975 will be calculated.
1976
1977 Output: The checksum value calculated for s.
1978 *****************************************************************************/
1979
1980 int str_checksum(const char *s)
1981 {
1982 int res = 0;
1983 int c;
1984 int i=0;
1985
1986 while(*s) {
1987 c = *s;
1988 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
1989 s++;
1990 i++;
1991 }
1992 return(res);
1993 }
1994
1995 /*****************************************************************
1996 Zero a memory area then free it. Used to catch bugs faster.
1997 *****************************************************************/
1998
1999 void zero_free(void *p, size_t size)
2000 {
2001 memset(p, 0, size);
2002 SAFE_FREE(p);
2003 }
2004
2005 /*****************************************************************
2006 Set our open file limit to a requested max and return the limit.
2007 *****************************************************************/
2008
2009 int set_maxfiles(int requested_max)
2010 {
2011 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2012 struct rlimit rlp;
2013 int saved_current_limit;
2014
2015 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2016 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2017 strerror(errno) ));
2018 /* just guess... */
2019 return requested_max;
2020 }
2021
2022 /*
2023 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2024 * account for the extra fd we need
2025 * as well as the log files and standard
2026 * handles etc. Save the limit we want to set in case
2027 * we are running on an OS that doesn't support this limit (AIX)
2028 * which always returns RLIM_INFINITY for rlp.rlim_max.
2029 */
2030
2031 /* Try raising the hard (max) limit to the requested amount. */
2032
2033 #if defined(RLIM_INFINITY)
2034 if (rlp.rlim_max != RLIM_INFINITY) {
2035 int orig_max = rlp.rlim_max;
2036
2037 if ( rlp.rlim_max < requested_max )
2038 rlp.rlim_max = requested_max;
2039
2040 /* This failing is not an error - many systems (Linux) don't
2041 support our default request of 10,000 open files. JRA. */
2042
2043 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2044 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2045 (int)rlp.rlim_max, strerror(errno) ));
2046
2047 /* Set failed - restore original value from get. */
2048 rlp.rlim_max = orig_max;
2049 }
2050 }
2051 #endif
2052
2053 /* Now try setting the soft (current) limit. */
2054
2055 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2056
2057 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2058 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2059 (int)rlp.rlim_cur, strerror(errno) ));
2060 /* just guess... */
2061 return saved_current_limit;
2062 }
2063
2064 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2065 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2066 strerror(errno) ));
2067 /* just guess... */
2068 return saved_current_limit;
2069 }
2070
2071 #if defined(RLIM_INFINITY)
2072 if(rlp.rlim_cur == RLIM_INFINITY)
2073 return saved_current_limit;
2074 #endif
2075
2076 if((int)rlp.rlim_cur > saved_current_limit)
2077 return saved_current_limit;
2078
2079 return rlp.rlim_cur;
2080 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2081 /*
2082 * No way to know - just guess...
2083 */
2084 return requested_max;
2085 #endif
2086 }
2087
2088 /*****************************************************************
2089 malloc that aborts with smb_panic on fail or zero size.
2090 *****************************************************************/
2091
2092 void *smb_xmalloc_array(size_t size, unsigned int count)
2093 {
2094 void *p;
2095 if (size == 0) {
2096 smb_panic("smb_xmalloc_array: called with zero size");
2097 }
2098 if (count >= MAX_ALLOC_SIZE/size) {
2099 smb_panic("smb_xmalloc_array: alloc size too large");
2100 }
2101 if ((p = SMB_MALLOC(size*count)) == NULL) {
2102 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2103 (unsigned long)size, (unsigned long)count));
2104 smb_panic("smb_xmalloc_array: malloc failed");
2105 }
2106 return p;
2107 }
2108
2109 /*
2110 vasprintf that aborts on malloc fail
2111 */
2112
2113 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2114 {
2115 int n;
2116 va_list ap2;
2117
2118 va_copy(ap2, ap);
2119
2120 n = vasprintf(ptr, format, ap2);
2121 va_end(ap2);
2122 if (n == -1 || ! *ptr) {
2123 smb_panic("smb_xvasprintf: out of memory");
2124 }
2125 return n;
2126 }
2127
2128 /*****************************************************************
2129 Get local hostname and cache result.
2130 *****************************************************************/
2131
2132 char *myhostname(void)
2133 {
2134 static char *ret;
2135 if (ret == NULL) {
2136 /* This is cached forever so
2137 * use talloc_autofree_context() ctx. */
2138 ret = get_myname(talloc_autofree_context());
2139 }
2140 return ret;
2141 }
2142
2143 /**
2144 * @brief Returns an absolute path to a file concatenating the provided
2145 * @a rootpath and @a basename
2146 *
2147 * @param name Filename, relative to @a rootpath
2148 *
2149 * @retval Pointer to a string containing the full path.
2150 **/
2151
2152 static char *xx_path(const char *name, const char *rootpath)
2153 {
2154 char *fname = NULL;
2155
2156 fname = talloc_strdup(talloc_tos(), rootpath);
2157 if (!fname) {
2158 return NULL;
2159 }
2160 trim_string(fname,"","/");
2161
2162 if (!directory_exist(fname)) {
2163 if (!mkdir(fname,0755))
2164 DEBUG(1, ("Unable to create directory %s for file %s. "
2165 "Error was %s\n", fname, name, strerror(errno)));
2166 }
2167
2168 return talloc_asprintf(talloc_tos(),
2169 "%s/%s",
2170 fname,
2171 name);
2172 }
2173
2174 /**
2175 * @brief Returns an absolute path to a file in the Samba lock directory.
2176 *
2177 * @param name File to find, relative to LOCKDIR.
2178 *
2179 * @retval Pointer to a talloc'ed string containing the full path.
2180 **/
2181
2182 char *lock_path(const char *name)
2183 {
2184 return xx_path(name, lp_lockdir());
2185 }
2186
2187 /**
2188 * @brief Returns an absolute path to a file in the Samba pid directory.
2189 *
2190 * @param name File to find, relative to PIDDIR.
2191 *
2192 * @retval Pointer to a talloc'ed string containing the full path.
2193 **/
2194
2195 char *pid_path(const char *name)
2196 {
2197 return xx_path(name, lp_piddir());
2198 }
2199
2200 /**
2201 * @brief Returns an absolute path to a file in the Samba lib directory.
2202 *
2203 * @param name File to find, relative to LIBDIR.
2204 *
2205 * @retval Pointer to a string containing the full path.
2206 **/
2207
2208 char *lib_path(const char *name)
2209 {
2210 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2211 }
2212
2213 /**
2214 * @brief Returns an absolute path to a file in the Samba modules directory.
2215 *
2216 * @param name File to find, relative to MODULESDIR.
2217 *
2218 * @retval Pointer to a string containing the full path.
2219 **/
2220
2221 char *modules_path(const char *name)
2222 {
2223 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2224 }
2225
2226 /**
2227 * @brief Returns an absolute path to a file in the Samba data directory.
2228 *
2229 * @param name File to find, relative to CODEPAGEDIR.
2230 *
2231 * @retval Pointer to a talloc'ed string containing the full path.
2232 **/
2233
2234 char *data_path(const char *name)
2235 {
2236 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2237 }
2238
2239 /**
2240 * @brief Returns an absolute path to a file in the Samba state directory.
2241 *
2242 * @param name File to find, relative to STATEDIR.
2243 *
2244 * @retval Pointer to a talloc'ed string containing the full path.
2245 **/
2246
2247 char *state_path(const char *name)
2248 {
2249 return xx_path(name, lp_statedir());
2250 }
2251
2252 /**
2253 * @brief Returns an absolute path to a file in the Samba cache directory.
2254 *
2255 * @param name File to find, relative to CACHEDIR.
2256 *
2257 * @retval Pointer to a talloc'ed string containing the full path.
2258 **/
2259
2260 char *cache_path(const char *name)
2261 {
2262 return xx_path(name, lp_cachedir());
2263 }
2264
2265 /**
2266 * @brief Returns the platform specific shared library extension.
2267 *
2268 * @retval Pointer to a const char * containing the extension.
2269 **/
2270
2271 const char *shlib_ext(void)
2272 {
2273 return get_dyn_SHLIBEXT();
2274 }
2275
2276 /*******************************************************************
2277 Given a filename - get its directory name
2278 ********************************************************************/
2279
2280 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
2281 const char **name)
2282 {
2283 char *p;
2284 ptrdiff_t len;
2285
2286 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2287
2288 if (p == NULL) {
2289 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2290 return False;
2291 }
2292 if (name) {
2293 *name = dir;
2294 }
2295 return True;
2296 }
2297
2298 len = p-dir;
2299
2300 if (!(*parent = (char *)TALLOC_MEMDUP(mem_ctx, dir, len+1))) {
2301 return False;
2302 }
2303 (*parent)[len] = '\0';
2304
2305 if (name) {
2306 *name = p+1;
2307 }
2308 return True;
2309 }
2310
2311 /*******************************************************************
2312 Determine if a pattern contains any Microsoft wildcard characters.
2313 *******************************************************************/
2314
2315 bool ms_has_wild(const char *s)
2316 {
2317 char c;
2318
2319 if (lp_posix_pathnames()) {
2320 /* With posix pathnames no characters are wild. */
2321 return False;
2322 }
2323
2324 while ((c = *s++)) {
2325 switch (c) {
2326 case '*':
2327 case '?':
2328 case '<':
2329 case '>':
2330 case '"':
2331 return True;
2332 }
2333 }
2334 return False;
2335 }
2336
2337 bool ms_has_wild_w(const smb_ucs2_t *s)
2338 {
2339 smb_ucs2_t c;
2340 if (!s) return False;
2341 while ((c = *s++)) {
2342 switch (c) {
2343 case UCS2_CHAR('*'):
2344 case UCS2_CHAR('?'):
2345 case UCS2_CHAR('<'):
2346 case UCS2_CHAR('>'):
2347 case UCS2_CHAR('"'):
2348 return True;
2349 }
2350 }
2351 return False;
2352 }
2353
2354 /*******************************************************************
2355 A wrapper that handles case sensitivity and the special handling
2356 of the ".." name.
2357 *******************************************************************/
2358
2359 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2360 {
2361 if (ISDOTDOT(string))
2362 string = ".";
2363 if (ISDOT(pattern))
2364 return False;
2365
2366 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2367 }
2368
2369 /*******************************************************************
2370 A wrapper that handles case sensitivity and the special handling
2371 of the ".." name. Varient that is only called by old search code which requires
2372 pattern translation.
2373 *******************************************************************/
2374
2375 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2376 {
2377 if (ISDOTDOT(string))
2378 string = ".";
2379 if (ISDOT(pattern))
2380 return False;
2381
2382 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2383 }
2384
2385 /*******************************************************************
2386 A wrapper that handles a list of patters and calls mask_match()
2387 on each. Returns True if any of the patterns match.
2388 *******************************************************************/
2389
2390 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2391 {
2392 while (listLen-- > 0) {
2393 if (mask_match(string, *list++, is_case_sensitive))
2394 return True;
2395 }
2396 return False;
2397 }
2398
2399 /*********************************************************
2400 Recursive routine that is called by unix_wild_match.
2401 *********************************************************/
2402
2403 static bool unix_do_match(const char *regexp, const char *str)
2404 {
2405 const char *p;
2406
2407 for( p = regexp; *p && *str; ) {
2408
2409 switch(*p) {
2410 case '?':
2411 str++;
2412 p++;
2413 break;
2414
2415 case '*':
2416
2417 /*
2418 * Look for a character matching
2419 * the one after the '*'.
2420 */
2421 p++;
2422 if(!*p)
2423 return true; /* Automatic match */
2424 while(*str) {
2425
2426 while(*str && (*p != *str))
2427 str++;
2428
2429 /*
2430 * Patch from weidel@multichart.de. In the case of the regexp
2431 * '*XX*' we want to ensure there are at least 2 'X' characters
2432 * in the string after the '*' for a match to be made.
2433 */
2434
2435 {
2436 int matchcount=0;
2437
2438 /*
2439 * Eat all the characters that match, but count how many there were.
2440 */
2441
2442 while(*str && (*p == *str)) {
2443 str++;
2444 matchcount++;
2445 }
2446
2447 /*
2448 * Now check that if the regexp had n identical characters that
2449 * matchcount had at least that many matches.
2450 */
2451
2452 while ( *(p+1) && (*(p+1) == *p)) {
2453 p++;
2454 matchcount--;
2455 }
2456
2457 if ( matchcount <= 0 )
2458 return false;
2459 }
2460
2461 str--; /* We've eaten the match char after the '*' */
2462
2463 if(unix_do_match(p, str))
2464 return true;
2465
2466 if(!*str)
2467 return false;
2468 else
2469 str++;
2470 }
2471 return false;
2472
2473 default:
2474 if(*str != *p)
2475 return false;
2476 str++;
2477 p++;
2478 break;
2479 }
2480 }
2481
2482 if(!*p && !*str)
2483 return true;
2484
2485 if (!*p && str[0] == '.' && str[1] == 0)
2486 return true;
2487
2488 if (!*str && *p == '?') {
2489 while (*p == '?')
2490 p++;
2491 return(!*p);
2492 }
2493
2494 if(!*str && (*p == '*' && p[1] == '\0'))
2495 return true;
2496
2497 return false;
2498 }
2499
2500 /*******************************************************************
2501 Simple case insensitive interface to a UNIX wildcard matcher.
2502 Returns True if match, False if not.
2503 *******************************************************************/
2504
2505 bool unix_wild_match(const char *pattern, const char *string)
2506 {
2507 TALLOC_CTX *ctx = talloc_stackframe();
2508 char *p2;
2509 char *s2;
2510 char *p;
2511 bool ret = false;
2512
2513 p2 = talloc_strdup(ctx,pattern);
2514 s2 = talloc_strdup(ctx,string);
2515 if (!p2 || !s2) {
2516 TALLOC_FREE(ctx);
2517 return false;
2518 }
2519 strlower_m(p2);
2520 strlower_m(s2);
2521
2522 /* Remove any *? and ** from the pattern as they are meaningless */
2523 for(p = p2; *p; p++) {
2524 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2525 memmove(&p[1], &p[2], strlen(&p[2])+1);
2526 }
2527 }
2528
2529 if (strequal(p2,"*")) {
2530 TALLOC_FREE(ctx);
2531 return true;
2532 }
2533
2534 ret = unix_do_match(p2, s2);
2535 TALLOC_FREE(ctx);
2536 return ret;
2537 }
2538
2539 /**********************************************************************
2540 Converts a name to a fully qualified domain name.
2541 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2542 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2543 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2544 ***********************************************************************/
2545
2546 bool name_to_fqdn(fstring fqdn, const char *name)
2547 {
2548 char *full = NULL;
2549 struct hostent *hp = gethostbyname(name);
2550
2551 if (!hp || !hp->h_name || !*hp->h_name) {
2552 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2553 fstrcpy(fqdn, name);
2554 return false;
2555 }
2556
2557 /* Find out if the fqdn is returned as an alias
2558 * to cope with /etc/hosts files where the first
2559 * name is not the fqdn but the short name */
2560 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2561 int i;
2562 for (i = 0; hp->h_aliases[i]; i++) {
2563 if (strchr_m(hp->h_aliases[i], '.')) {
2564 full = hp->h_aliases[i];
2565 break;
2566 }
2567 }
2568 }
2569 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2570 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2571 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2572 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2573 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2574 full = hp->h_name;
2575 }
2576 if (!full) {
2577 full = hp->h_name;
2578 }
2579
2580 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2581 fstrcpy(fqdn, full);
2582 return true;
2583 }
2584
2585 /**********************************************************************
2586 Append a DATA_BLOB to a talloc'ed object
2587 ***********************************************************************/
2588
2589 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
2590 {
2591 size_t old_size = 0;
2592 char *result;
2593
2594 if (blob.length == 0) {
2595 return buf;
2596 }
2597
2598 if (buf != NULL) {
2599 old_size = talloc_get_size(buf);
2600 }
2601
2602 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
2603 if (result == NULL) {
2604 return NULL;
2605 }
2606
2607 memcpy(result + old_size, blob.data, blob.length);
2608 return result;
2609 }
2610
2611 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2612 {
2613 switch (share_access & ~FILE_SHARE_DELETE) {
2614 case FILE_SHARE_NONE:
2615 return DENY_ALL;
2616 case FILE_SHARE_READ:
2617 return DENY_WRITE;
2618 case FILE_SHARE_WRITE:
2619 return DENY_READ;
2620 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2621 return DENY_NONE;
2622 }
2623 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2624 return DENY_DOS;
2625 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2626 return DENY_FCB;
2627 }
2628
2629 return (uint32)-1;
2630 }
2631
2632 pid_t procid_to_pid(const struct server_id *proc)
2633 {
2634 return proc->pid;
2635 }
2636
2637 static uint32 my_vnn = NONCLUSTER_VNN;
2638
2639 void set_my_vnn(uint32 vnn)
2640 {
2641 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
2642 my_vnn = vnn;
2643 }
2644
2645 uint32 get_my_vnn(void)
2646 {
2647 return my_vnn;
2648 }
2649
2650 struct server_id pid_to_procid(pid_t pid)
2651 {
2652 struct server_id result;
2653 result.pid = pid;
2654 #ifdef CLUSTER_SUPPORT
2655 result.vnn = my_vnn;
2656 #endif
2657 return result;
2658 }
2659
2660 struct server_id procid_self(void)
2661 {
2662 return pid_to_procid(sys_getpid());
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 struct server_id result;
2696 int pid;
2697 #ifdef CLUSTER_SUPPORT
2698 unsigned int vnn;
2699 if (sscanf(pid_string, "%u:%d", &vnn, &pid) == 2) {
2700 result.vnn = vnn;
2701 result.pid = pid;
2702 }
2703 else if (sscanf(pid_string, "%d", &pid) == 1) {
2704 result.vnn = get_my_vnn();
2705 result.pid = pid;
2706 }
2707 else {
2708 result.vnn = NONCLUSTER_VNN;
2709 result.pid = -1;
2710 }
2711 #else
2712 if (sscanf(pid_string, "%d", &pid) != 1) {
2713 result.pid = -1;
2714 } else {
2715 result.pid = pid;
2716 }
2717 #endif
2718 /* Assigning to result.pid may have overflowed
2719 Map negative pid to -1: i.e. error */
2720 if (result.pid < 0) {
2721 result.pid = -1;
2722 }
2723 return result;
2724 }
2725
2726 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
2727 {
2728 #ifdef CLUSTER_SUPPORT
2729 if (pid->vnn == NONCLUSTER_VNN) {
2730 return talloc_asprintf(mem_ctx,
2731 "%d",
2732 (int)pid->pid);
2733 }
2734 else {
2735 return talloc_asprintf(mem_ctx,
2736 "%u:%d",
2737 (unsigned)pid->vnn,
2738 (int)pid->pid);
2739 }
2740 #else
2741 return talloc_asprintf(mem_ctx,
2742 "%d",
2743 (int)pid->pid);
2744 #endif
2745 }
2746
2747 char *procid_str_static(const struct server_id *pid)
2748 {
2749 return procid_str(talloc_tos(), pid);
2750 }
2751
2752 bool procid_valid(const struct server_id *pid)
2753 {
2754 return (pid->pid != -1);
2755 }
2756
2757 bool procid_is_local(const struct server_id *pid)
2758 {
2759 #ifdef CLUSTER_SUPPORT
2760 return pid->vnn == my_vnn;
2761 #else
2762 return True;
2763 #endif
2764 }
2765
2766 int this_is_smp(void)
2767 {
2768 #if defined(HAVE_SYSCONF)
2769
2770 #if defined(SYSCONF_SC_NPROC_ONLN)
2771 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
2772 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
2773 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
2774 #else
2775 return 0;
2776 #endif
2777
2778 #else
2779 return 0;
2780 #endif
2781 }
2782
2783 /****************************************************************
2784 Check if offset/length fit into bufsize. Should probably be
2785 merged with is_offset_safe, but this would require a rewrite
2786 of lanman.c. Later :-)
2787 ****************************************************************/
2788
2789 bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
2790 {
2791 if ((offset + length < offset) || (offset + length < length)) {
2792 /* wrap */
2793 return true;
2794 }
2795 if ((offset > bufsize) || (offset + length > bufsize)) {
2796 /* overflow */
2797 return true;
2798 }
2799 return false;
2800 }
2801
2802 /****************************************************************
2803 Check if an offset into a buffer is safe.
2804 If this returns True it's safe to indirect into the byte at
2805 pointer ptr+off.
2806 ****************************************************************/
2807
2808 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2809 {
2810 const char *end_base = buf_base + buf_len;
2811 char *end_ptr = ptr + off;
2812
2813 if (!buf_base || !ptr) {
2814 return False;
2815 }
2816
2817 if (end_base < buf_base || end_ptr < ptr) {
2818 return False; /* wrap. */
2819 }
2820
2821 if (end_ptr < end_base) {
2822 return True;
2823 }
2824 return False;
2825 }
2826
2827 /****************************************************************
2828 Return a safe pointer into a buffer, or NULL.
2829 ****************************************************************/
2830
2831 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2832 {
2833 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2834 ptr + off : NULL;
2835 }
2836
2837 /****************************************************************
2838 Return a safe pointer into a string within a buffer, or NULL.
2839 ****************************************************************/
2840
2841 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2842 {
2843 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2844 return NULL;
2845 }
2846 /* Check if a valid string exists at this offset. */
2847 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2848 return NULL;
2849 }
2850 return ptr + off;
2851 }
2852
2853 /****************************************************************
2854 Return an SVAL at a pointer, or failval if beyond the end.
2855 ****************************************************************/
2856
2857 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2858 {
2859 /*
2860 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2861 * NOT ptr[2].
2862 */
2863 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2864 return failval;
2865 }
2866 return SVAL(ptr,off);
2867 }
2868
2869 /****************************************************************
2870 Return an IVAL at a pointer, or failval if beyond the end.
2871 ****************************************************************/
2872
2873 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2874 {
2875 /*
2876 * Note we use off+3 here, not off+4 as IVAL accesses
2877 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2878 */
2879 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2880 return failval;
2881 }
2882 return IVAL(ptr,off);
2883 }
2884
2885 /****************************************************************
2886 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2887 call (they take care of winbind separator and other winbind specific settings).
2888 ****************************************************************/
2889
2890 void split_domain_user(TALLOC_CTX *mem_ctx,
2891 const char *full_name,
2892 char **domain,
2893 char **user)
2894 {
2895 const char *p = NULL;
2896
2897 p = strchr_m(full_name, '\\');
2898
2899 if (p != NULL) {
2900 *domain = talloc_strndup(mem_ctx, full_name,
2901 PTR_DIFF(p, full_name));
2902 *user = talloc_strdup(mem_ctx, p+1);
2903 } else {
2904 *domain = talloc_strdup(mem_ctx, "");
2905 *user = talloc_strdup(mem_ctx, full_name);
2906 }
2907 }
2908
2909 #if 0
2910
2911 Disable these now we have checked all code paths and ensured
2912 NULL returns on zero request. JRA.
2913
2914 /****************************************************************
2915 talloc wrapper functions that guarentee a null pointer return
2916 if size == 0.
2917 ****************************************************************/
2918
2919 #ifndef MAX_TALLOC_SIZE
2920 #define MAX_TALLOC_SIZE 0x10000000
2921 #endif
2922
2923 /*
2924 * talloc and zero memory.
2925 * - returns NULL if size is zero.
2926 */
2927
2928 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
2929 {
2930 void *p;
2931
2932 if (size == 0) {
2933 return NULL;
2934 }
2935
2936 p = talloc_named_const(ctx, size, name);
2937
2938 if (p) {
2939 memset(p, '\0', size);
2940 }
2941
2942 return p;
2943 }
2944
2945 /*
2946 * memdup with a talloc.
2947 * - returns NULL if size is zero.
2948 */
2949
2950 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
2951 {
2952 void *newp;
2953
2954 if (size == 0) {
2955 return NULL;
2956 }
2957
2958 newp = talloc_named_const(t, size, name);
2959 if (newp) {
2960 memcpy(newp, p, size);
2961 }
2962
2963 return newp;
2964 }
2965
2966 /*
2967 * alloc an array, checking for integer overflow in the array size.
2968 * - returns NULL if count or el_size are zero.
2969 */
2970
2971 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2972 {
2973 if (count >= MAX_TALLOC_SIZE/el_size) {
2974 return NULL;
2975 }
2976
2977 if (el_size == 0 || count == 0) {
2978 return NULL;
2979 }
2980
2981 return talloc_named_const(ctx, el_size * count, name);
2982 }
2983
2984 /*
2985 * alloc an zero array, checking for integer overflow in the array size
2986 * - returns NULL if count or el_size are zero.
2987 */
2988
2989 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2990 {
2991 if (count >= MAX_TALLOC_SIZE/el_size) {
2992 return NULL;
2993 }
2994
2995 if (el_size == 0 || count == 0) {
2996 return NULL;
2997 }
2998
2999 return _talloc_zero(ctx, el_size * count, name);
3000 }
3001
3002 /*
3003 * Talloc wrapper that returns NULL if size == 0.
3004 */
3005 void *talloc_zeronull(const void *context, size_t size, const char *name)
3006 {
3007 if (size == 0) {
3008 return NULL;
3009 }
3010 return talloc_named_const(context, size, name);
3011 }
3012 #endif
3013
3014 bool is_valid_policy_hnd(const struct policy_handle *hnd)
3015 {
3016 struct policy_handle tmp;
3017 ZERO_STRUCT(tmp);
3018 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
3019 }
3020
3021 bool policy_hnd_equal(const struct policy_handle *hnd1,
3022 const struct policy_handle *hnd2)
3023 {
3024 if (!hnd1 || !hnd2) {
3025 return false;
3026 }
3027
3028 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
3029 }
3030
3031 /****************************************************************
3032 strip off leading '\\' from a hostname
3033 ****************************************************************/
3034
3035 const char *strip_hostname(const char *s)
3036 {
3037 if (!s) {
3038 return NULL;
3039 }
3040
3041 if (strlen_m(s) < 3) {
3042 return s;
3043 }
3044
3045 if (s[0] == '\\') s++;
3046 if (s[0] == '\\') s++;
3047
3048 return s;
3049 }
3050
3051 bool tevent_req_poll_ntstatus(struct tevent_req *req,
3052 struct tevent_context *ev,
3053 NTSTATUS *status)
3054 {
3055 bool ret = tevent_req_poll(req, ev);
3056 if (!ret) {
3057 *status = map_nt_error_from_unix(errno);
3058 }
3059 return ret;
3060 }
Crístian's Samba branch