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Fix bug 7528 - Solaris with NIS autohome.
[Samba/gebeck_regimport.git] / source3 / lib / util.c
blobd7e765d1aff279b85c763b0e7ee7a066db0ebe62
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_scope;
77 static int smb_num_netbios_names;
78 static char **smb_my_netbios_names;
79
80 /***********************************************************************
81 Allocate and set scope. Ensure upper case.
82 ***********************************************************************/
83
84 bool set_global_scope(const char *scope)
85 {
86 SAFE_FREE(smb_scope);
87 smb_scope = SMB_STRDUP(scope);
88 if (!smb_scope)
89 return False;
90 strupper_m(smb_scope);
91 return True;
92 }
93
94 /*********************************************************************
95 Ensure scope is never null string.
96 *********************************************************************/
97
98 const char *global_scope(void)
99 {
100 if (!smb_scope)
101 set_global_scope("");
102 return smb_scope;
103 }
104
105 static void free_netbios_names_array(void)
106 {
107 int i;
108
109 for (i = 0; i < smb_num_netbios_names; i++)
110 SAFE_FREE(smb_my_netbios_names[i]);
111
112 SAFE_FREE(smb_my_netbios_names);
113 smb_num_netbios_names = 0;
114 }
115
116 static bool allocate_my_netbios_names_array(size_t number)
117 {
118 free_netbios_names_array();
119
120 smb_num_netbios_names = number + 1;
121 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
122
123 if (!smb_my_netbios_names)
124 return False;
125
126 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
127 return True;
128 }
129
130 static bool set_my_netbios_names(const char *name, int i)
131 {
132 SAFE_FREE(smb_my_netbios_names[i]);
133
134 smb_my_netbios_names[i] = SMB_STRDUP(name);
135 if (!smb_my_netbios_names[i])
136 return False;
137 strupper_m(smb_my_netbios_names[i]);
138 return True;
139 }
140
141 /***********************************************************************
142 Free memory allocated to global objects
143 ***********************************************************************/
144
145 void gfree_names(void)
146 {
147 gfree_netbios_names();
148 SAFE_FREE( smb_scope );
149 free_netbios_names_array();
150 free_local_machine_name();
151 }
152
153 void gfree_all( void )
154 {
155 gfree_names();
156 gfree_loadparm();
157 gfree_case_tables();
158 gfree_charcnv();
159 gfree_interfaces();
160 gfree_debugsyms();
161 }
162
163 const char *my_netbios_names(int i)
164 {
165 return smb_my_netbios_names[i];
166 }
167
168 bool set_netbios_aliases(const char **str_array)
169 {
170 size_t namecount;
171
172 /* Work out the max number of netbios aliases that we have */
173 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
174 ;
175
176 if ( global_myname() && *global_myname())
177 namecount++;
178
179 /* Allocate space for the netbios aliases */
180 if (!allocate_my_netbios_names_array(namecount))
181 return False;
182
183 /* Use the global_myname string first */
184 namecount=0;
185 if ( global_myname() && *global_myname()) {
186 set_my_netbios_names( global_myname(), namecount );
187 namecount++;
188 }
189
190 if (str_array) {
191 size_t i;
192 for ( i = 0; str_array[i] != NULL; i++) {
193 size_t n;
194 bool duplicate = False;
195
196 /* Look for duplicates */
197 for( n=0; n<namecount; n++ ) {
198 if( strequal( str_array[i], my_netbios_names(n) ) ) {
199 duplicate = True;
200 break;
201 }
202 }
203 if (!duplicate) {
204 if (!set_my_netbios_names(str_array[i], namecount))
205 return False;
206 namecount++;
207 }
208 }
209 }
210 return True;
211 }
212
213 /****************************************************************************
214 Common name initialization code.
215 ****************************************************************************/
216
217 bool init_names(void)
218 {
219 int n;
220
221 if (global_myname() == NULL || *global_myname() == '\0') {
222 if (!set_global_myname(myhostname())) {
223 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
224 return False;
225 }
226 }
227
228 if (!set_netbios_aliases(lp_netbios_aliases())) {
229 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
230 return False;
231 }
232
233 set_local_machine_name(global_myname(),false);
234
235 DEBUG( 5, ("Netbios name list:-\n") );
236 for( n=0; my_netbios_names(n); n++ ) {
237 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
238 n, my_netbios_names(n) ) );
239 }
240
241 return( True );
242 }
243
244 /**************************************************************************n
245 Code to cope with username/password auth options from the commandline.
246 Used mainly in client tools.
247 ****************************************************************************/
248
249 struct user_auth_info *user_auth_info_init(TALLOC_CTX *mem_ctx)
250 {
251 struct user_auth_info *result;
252
253 result = TALLOC_ZERO_P(mem_ctx, struct user_auth_info);
254 if (result == NULL) {
255 return NULL;
256 }
257
258 result->signing_state = Undefined;
259 return result;
260 }
261
262 const char *get_cmdline_auth_info_username(const struct user_auth_info *auth_info)
263 {
264 if (!auth_info->username) {
265 return "";
266 }
267 return auth_info->username;
268 }
269
270 void set_cmdline_auth_info_username(struct user_auth_info *auth_info,
271 const char *username)
272 {
273 TALLOC_FREE(auth_info->username);
274 auth_info->username = talloc_strdup(auth_info, username);
275 if (!auth_info->username) {
276 exit(ENOMEM);
277 }
278 }
279
280 const char *get_cmdline_auth_info_domain(const struct user_auth_info *auth_info)
281 {
282 if (!auth_info->domain) {
283 return "";
284 }
285 return auth_info->domain;
286 }
287
288 void set_cmdline_auth_info_domain(struct user_auth_info *auth_info,
289 const char *domain)
290 {
291 TALLOC_FREE(auth_info->domain);
292 auth_info->domain = talloc_strdup(auth_info, domain);
293 if (!auth_info->domain) {
294 exit(ENOMEM);
295 }
296 }
297
298 const char *get_cmdline_auth_info_password(const struct user_auth_info *auth_info)
299 {
300 if (!auth_info->password) {
301 return "";
302 }
303 return auth_info->password;
304 }
305
306 void set_cmdline_auth_info_password(struct user_auth_info *auth_info,
307 const char *password)
308 {
309 TALLOC_FREE(auth_info->password);
310 if (password == NULL) {
311 password = "";
312 }
313 auth_info->password = talloc_strdup(auth_info, password);
314 if (!auth_info->password) {
315 exit(ENOMEM);
316 }
317 auth_info->got_pass = true;
318 }
319
320 bool set_cmdline_auth_info_signing_state(struct user_auth_info *auth_info,
321 const char *arg)
322 {
323 auth_info->signing_state = -1;
324 if (strequal(arg, "off") || strequal(arg, "no") ||
325 strequal(arg, "false")) {
326 auth_info->signing_state = false;
327 } else if (strequal(arg, "on") || strequal(arg, "yes") ||
328 strequal(arg, "true") || strequal(arg, "auto")) {
329 auth_info->signing_state = true;
330 } else if (strequal(arg, "force") || strequal(arg, "required") ||
331 strequal(arg, "forced")) {
332 auth_info->signing_state = Required;
333 } else {
334 return false;
335 }
336 return true;
337 }
338
339 int get_cmdline_auth_info_signing_state(const struct user_auth_info *auth_info)
340 {
341 return auth_info->signing_state;
342 }
343
344 void set_cmdline_auth_info_use_ccache(struct user_auth_info *auth_info, bool b)
345 {
346 auth_info->use_ccache = b;
347 }
348
349 bool get_cmdline_auth_info_use_ccache(const struct user_auth_info *auth_info)
350 {
351 return auth_info->use_ccache;
352 }
353
354 void set_cmdline_auth_info_use_kerberos(struct user_auth_info *auth_info,
355 bool b)
356 {
357 auth_info->use_kerberos = b;
358 }
359
360 bool get_cmdline_auth_info_use_kerberos(const struct user_auth_info *auth_info)
361 {
362 return auth_info->use_kerberos;
363 }
364
365 void set_cmdline_auth_info_fallback_after_kerberos(struct user_auth_info *auth_info,
366 bool b)
367 {
368 auth_info->fallback_after_kerberos = b;
369 }
370
371 bool get_cmdline_auth_info_fallback_after_kerberos(const struct user_auth_info *auth_info)
372 {
373 return auth_info->fallback_after_kerberos;
374 }
375
376 /* This should only be used by lib/popt_common.c JRA */
377 void set_cmdline_auth_info_use_krb5_ticket(struct user_auth_info *auth_info)
378 {
379 auth_info->use_kerberos = true;
380 auth_info->got_pass = true;
381 }
382
383 /* This should only be used by lib/popt_common.c JRA */
384 void set_cmdline_auth_info_smb_encrypt(struct user_auth_info *auth_info)
385 {
386 auth_info->smb_encrypt = true;
387 }
388
389 void set_cmdline_auth_info_use_machine_account(struct user_auth_info *auth_info)
390 {
391 auth_info->use_machine_account = true;
392 }
393
394 bool get_cmdline_auth_info_got_pass(const struct user_auth_info *auth_info)
395 {
396 return auth_info->got_pass;
397 }
398
399 bool get_cmdline_auth_info_smb_encrypt(const struct user_auth_info *auth_info)
400 {
401 return auth_info->smb_encrypt;
402 }
403
404 bool get_cmdline_auth_info_use_machine_account(const struct user_auth_info *auth_info)
405 {
406 return auth_info->use_machine_account;
407 }
408
409 struct user_auth_info *get_cmdline_auth_info_copy(TALLOC_CTX *mem_ctx,
410 const struct user_auth_info *src)
411 {
412 struct user_auth_info *result;
413
414 result = user_auth_info_init(mem_ctx);
415 if (result == NULL) {
416 return NULL;
417 }
418
419 *result = *src;
420
421 result->username = talloc_strdup(
422 result, get_cmdline_auth_info_username(src));
423 result->password = talloc_strdup(
424 result, get_cmdline_auth_info_password(src));
425 if ((result->username == NULL) || (result->password == NULL)) {
426 TALLOC_FREE(result);
427 return NULL;
428 }
429
430 return result;
431 }
432
433 bool set_cmdline_auth_info_machine_account_creds(struct user_auth_info *auth_info)
434 {
435 char *pass = NULL;
436 char *account = NULL;
437
438 if (!get_cmdline_auth_info_use_machine_account(auth_info)) {
439 return false;
440 }
441
442 if (!secrets_init()) {
443 d_printf("ERROR: Unable to open secrets database\n");
444 return false;
445 }
446
447 if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
448 return false;
449 }
450
451 pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
452 if (!pass) {
453 d_printf("ERROR: Unable to fetch machine password for "
454 "%s in domain %s\n",
455 account, lp_workgroup());
456 SAFE_FREE(account);
457 return false;
458 }
459
460 set_cmdline_auth_info_username(auth_info, account);
461 set_cmdline_auth_info_password(auth_info, pass);
462
463 SAFE_FREE(account);
464 SAFE_FREE(pass);
465
466 return true;
467 }
468
469 /****************************************************************************
470 Ensure we have a password if one not given.
471 ****************************************************************************/
472
473 void set_cmdline_auth_info_getpass(struct user_auth_info *auth_info)
474 {
475 char *label = NULL;
476 char *pass;
477 TALLOC_CTX *frame;
478
479 if (get_cmdline_auth_info_got_pass(auth_info) ||
480 get_cmdline_auth_info_use_kerberos(auth_info)) {
481 /* Already got one... */
482 return;
483 }
484
485 frame = talloc_stackframe();
486 label = talloc_asprintf(frame, "Enter %s's password: ",
487 get_cmdline_auth_info_username(auth_info));
488 pass = getpass(label);
489 if (pass) {
490 set_cmdline_auth_info_password(auth_info, pass);
491 }
492 TALLOC_FREE(frame);
493 }
494
495 /*******************************************************************
496 Check if a file exists - call vfs_file_exist for samba files.
497 ********************************************************************/
498
499 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf,
500 bool fake_dir_create_times)
501 {
502 SMB_STRUCT_STAT st;
503 if (!sbuf)
504 sbuf = &st;
505
506 if (sys_stat(fname, sbuf, fake_dir_create_times) != 0)
507 return(False);
508
509 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
510 }
511
512 /*******************************************************************
513 Check if a unix domain socket exists - call vfs_file_exist for samba files.
514 ********************************************************************/
515
516 bool socket_exist(const char *fname)
517 {
518 SMB_STRUCT_STAT st;
519 if (sys_stat(fname, &st, false) != 0)
520 return(False);
521
522 return S_ISSOCK(st.st_ex_mode);
523 }
524
525 /*******************************************************************
526 Returns the size in bytes of the named given the stat struct.
527 ********************************************************************/
528
529 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
530 {
531 return sbuf->st_ex_size;
532 }
533
534 /*******************************************************************
535 Returns the size in bytes of the named file.
536 ********************************************************************/
537
538 SMB_OFF_T get_file_size(char *file_name)
539 {
540 SMB_STRUCT_STAT buf;
541 buf.st_ex_size = 0;
542 if (sys_stat(file_name, &buf, false) != 0)
543 return (SMB_OFF_T)-1;
544 return get_file_size_stat(&buf);
545 }
546
547 /*******************************************************************
548 Return a string representing an attribute for a file.
549 ********************************************************************/
550
551 char *attrib_string(uint16 mode)
552 {
553 fstring attrstr;
554
555 attrstr[0] = 0;
556
557 if (mode & aVOLID) fstrcat(attrstr,"V");
558 if (mode & aDIR) fstrcat(attrstr,"D");
559 if (mode & aARCH) fstrcat(attrstr,"A");
560 if (mode & aHIDDEN) fstrcat(attrstr,"H");
561 if (mode & aSYSTEM) fstrcat(attrstr,"S");
562 if (mode & aRONLY) fstrcat(attrstr,"R");
563
564 return talloc_strdup(talloc_tos(), attrstr);
565 }
566
567 /*******************************************************************
568 Show a smb message structure.
569 ********************************************************************/
570
571 void show_msg(char *buf)
572 {
573 int i;
574 int bcc=0;
575
576 if (!DEBUGLVL(5))
577 return;
578
579 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
580 smb_len(buf),
581 (int)CVAL(buf,smb_com),
582 (int)CVAL(buf,smb_rcls),
583 (int)CVAL(buf,smb_reh),
584 (int)SVAL(buf,smb_err),
585 (int)CVAL(buf,smb_flg),
586 (int)SVAL(buf,smb_flg2)));
587 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
588 (int)SVAL(buf,smb_tid),
589 (int)SVAL(buf,smb_pid),
590 (int)SVAL(buf,smb_uid),
591 (int)SVAL(buf,smb_mid)));
592 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
593
594 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
595 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
596 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
597
598 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
599
600 DEBUGADD(5,("smb_bcc=%d\n",bcc));
601
602 if (DEBUGLEVEL < 10)
603 return;
604
605 if (DEBUGLEVEL < 50)
606 bcc = MIN(bcc, 512);
607
608 dump_data(10, (uint8 *)smb_buf(buf), bcc);
609 }
610
611 /*******************************************************************
612 Set the length and marker of an encrypted smb packet.
613 ********************************************************************/
614
615 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
616 {
617 _smb_setlen(buf,len);
618
619 SCVAL(buf,4,0xFF);
620 SCVAL(buf,5,'E');
621 SSVAL(buf,6,enc_ctx_num);
622 }
623
624 /*******************************************************************
625 Set the length and marker of an smb packet.
626 ********************************************************************/
627
628 void smb_setlen(char *buf,int len)
629 {
630 _smb_setlen(buf,len);
631
632 SCVAL(buf,4,0xFF);
633 SCVAL(buf,5,'S');
634 SCVAL(buf,6,'M');
635 SCVAL(buf,7,'B');
636 }
637
638 /*******************************************************************
639 Setup only the byte count for a smb message.
640 ********************************************************************/
641
642 int set_message_bcc(char *buf,int num_bytes)
643 {
644 int num_words = CVAL(buf,smb_wct);
645 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
646 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
647 return (smb_size + num_words*2 + num_bytes);
648 }
649
650 /*******************************************************************
651 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
652 Return the bytes added
653 ********************************************************************/
654
655 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
656 {
657 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
658 uint8 *tmp;
659
660 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
661 DEBUG(0, ("talloc failed\n"));
662 return -1;
663 }
664 *outbuf = tmp;
665
666 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
667 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
668 return blob.length;
669 }
670
671 /*******************************************************************
672 Reduce a file name, removing .. elements.
673 ********************************************************************/
674
675 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
676 {
677 char *p = NULL;
678 char *str = NULL;
679
680 DEBUG(3,("dos_clean_name [%s]\n",s));
681
682 /* remove any double slashes */
683 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
684 if (!str) {
685 return NULL;
686 }
687
688 /* Remove leading .\\ characters */
689 if(strncmp(str, ".\\", 2) == 0) {
690 trim_string(str, ".\\", NULL);
691 if(*str == 0) {
692 str = talloc_strdup(ctx, ".\\");
693 if (!str) {
694 return NULL;
695 }
696 }
697 }
698
699 while ((p = strstr_m(str,"\\..\\")) != NULL) {
700 char *s1;
701
702 *p = 0;
703 s1 = p+3;
704
705 if ((p=strrchr_m(str,'\\')) != NULL) {
706 *p = 0;
707 } else {
708 *str = 0;
709 }
710 str = talloc_asprintf(ctx,
711 "%s%s",
712 str,
713 s1);
714 if (!str) {
715 return NULL;
716 }
717 }
718
719 trim_string(str,NULL,"\\..");
720 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
721 }
722
723 /*******************************************************************
724 Reduce a file name, removing .. elements.
725 ********************************************************************/
726
727 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
728 {
729 char *p = NULL;
730 char *str = NULL;
731
732 DEBUG(3,("unix_clean_name [%s]\n",s));
733
734 /* remove any double slashes */
735 str = talloc_all_string_sub(ctx, s, "//","/");
736 if (!str) {
737 return NULL;
738 }
739
740 /* Remove leading ./ characters */
741 if(strncmp(str, "./", 2) == 0) {
742 trim_string(str, "./", NULL);
743 if(*str == 0) {
744 str = talloc_strdup(ctx, "./");
745 if (!str) {
746 return NULL;
747 }
748 }
749 }
750
751 while ((p = strstr_m(str,"/../")) != NULL) {
752 char *s1;
753
754 *p = 0;
755 s1 = p+3;
756
757 if ((p=strrchr_m(str,'/')) != NULL) {
758 *p = 0;
759 } else {
760 *str = 0;
761 }
762 str = talloc_asprintf(ctx,
763 "%s%s",
764 str,
765 s1);
766 if (!str) {
767 return NULL;
768 }
769 }
770
771 trim_string(str,NULL,"/..");
772 return talloc_all_string_sub(ctx, str, "/./", "/");
773 }
774
775 char *clean_name(TALLOC_CTX *ctx, const char *s)
776 {
777 char *str = dos_clean_name(ctx, s);
778 if (!str) {
779 return NULL;
780 }
781 return unix_clean_name(ctx, str);
782 }
783
784 /*******************************************************************
785 Write data into an fd at a given offset. Ignore seek errors.
786 ********************************************************************/
787
788 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
789 {
790 size_t total=0;
791 ssize_t ret;
792
793 if (pos == (SMB_OFF_T)-1) {
794 return write_data(fd, buffer, N);
795 }
796 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
797 while (total < N) {
798 ret = sys_pwrite(fd,buffer + total,N - total, pos);
799 if (ret == -1 && errno == ESPIPE) {
800 return write_data(fd, buffer + total,N - total);
801 }
802 if (ret == -1) {
803 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
804 return -1;
805 }
806 if (ret == 0) {
807 return total;
808 }
809 total += ret;
810 pos += ret;
811 }
812 return (ssize_t)total;
813 #else
814 /* Use lseek and write_data. */
815 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
816 if (errno != ESPIPE) {
817 return -1;
818 }
819 }
820 return write_data(fd, buffer, N);
821 #endif
822 }
823
824 /*******************************************************************
825 Sleep for a specified number of milliseconds.
826 ********************************************************************/
827
828 void smb_msleep(unsigned int t)
829 {
830 #if defined(HAVE_NANOSLEEP)
831 struct timespec tval;
832 int ret;
833
834 tval.tv_sec = t/1000;
835 tval.tv_nsec = 1000000*(t%1000);
836
837 do {
838 errno = 0;
839 ret = nanosleep(&tval, &tval);
840 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
841 #else
842 unsigned int tdiff=0;
843 struct timeval tval,t1,t2;
844 fd_set fds;
845
846 GetTimeOfDay(&t1);
847 t2 = t1;
848
849 while (tdiff < t) {
850 tval.tv_sec = (t-tdiff)/1000;
851 tval.tv_usec = 1000*((t-tdiff)%1000);
852
853 /* Never wait for more than 1 sec. */
854 if (tval.tv_sec > 1) {
855 tval.tv_sec = 1;
856 tval.tv_usec = 0;
857 }
858
859 FD_ZERO(&fds);
860 errno = 0;
861 sys_select_intr(0,&fds,NULL,NULL,&tval);
862
863 GetTimeOfDay(&t2);
864 if (t2.tv_sec < t1.tv_sec) {
865 /* Someone adjusted time... */
866 t1 = t2;
867 }
868
869 tdiff = TvalDiff(&t1,&t2);
870 }
871 #endif
872 }
873
874 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
875 struct event_context *ev_ctx,
876 bool parent_longlived)
877 {
878 NTSTATUS status = NT_STATUS_OK;
879
880 /* Reset the state of the random
881 * number generation system, so
882 * children do not get the same random
883 * numbers as each other */
884 set_need_random_reseed();
885
886 /* tdb needs special fork handling */
887 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
888 DEBUG(0,("tdb_reopen_all failed.\n"));
889 status = NT_STATUS_OPEN_FAILED;
890 goto done;
891 }
892
893 if (ev_ctx && tevent_re_initialise(ev_ctx) != 0) {
894 smb_panic(__location__ ": Failed to re-initialise event context");
895 }
896
897 if (msg_ctx) {
898 /*
899 * For clustering, we need to re-init our ctdbd connection after the
900 * fork
901 */
902 status = messaging_reinit(msg_ctx);
903 if (!NT_STATUS_IS_OK(status)) {
904 DEBUG(0,("messaging_reinit() failed: %s\n",
905 nt_errstr(status)));
906 }
907 }
908 done:
909 return status;
910 }
911
912 #if defined(PARANOID_MALLOC_CHECKER)
913
914 /****************************************************************************
915 Internal malloc wrapper. Externally visible.
916 ****************************************************************************/
917
918 void *malloc_(size_t size)
919 {
920 if (size == 0) {
921 return NULL;
922 }
923 #undef malloc
924 return malloc(size);
925 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
926 }
927
928 /****************************************************************************
929 Internal calloc wrapper. Not externally visible.
930 ****************************************************************************/
931
932 static void *calloc_(size_t count, size_t size)
933 {
934 if (size == 0 || count == 0) {
935 return NULL;
936 }
937 #undef calloc
938 return calloc(count, size);
939 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
940 }
941
942 /****************************************************************************
943 Internal realloc wrapper. Not externally visible.
944 ****************************************************************************/
945
946 static void *realloc_(void *ptr, size_t size)
947 {
948 #undef realloc
949 return realloc(ptr, size);
950 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
951 }
952
953 #endif /* PARANOID_MALLOC_CHECKER */
954
955 /****************************************************************************
956 Type-safe memalign
957 ****************************************************************************/
958
959 void *memalign_array(size_t el_size, size_t align, unsigned int count)
960 {
961 if (count >= MAX_ALLOC_SIZE/el_size) {
962 return NULL;
963 }
964
965 return sys_memalign(align, el_size*count);
966 }
967
968 /****************************************************************************
969 Type-safe calloc.
970 ****************************************************************************/
971
972 void *calloc_array(size_t size, size_t nmemb)
973 {
974 if (nmemb >= MAX_ALLOC_SIZE/size) {
975 return NULL;
976 }
977 if (size == 0 || nmemb == 0) {
978 return NULL;
979 }
980 #if defined(PARANOID_MALLOC_CHECKER)
981 return calloc_(nmemb, size);
982 #else
983 return calloc(nmemb, size);
984 #endif
985 }
986
987 /****************************************************************************
988 Expand a pointer to be a particular size.
989 Note that this version of Realloc has an extra parameter that decides
990 whether to free the passed in storage on allocation failure or if the
991 new size is zero.
992
993 This is designed for use in the typical idiom of :
994
995 p = SMB_REALLOC(p, size)
996 if (!p) {
997 return error;
998 }
999
1000 and not to have to keep track of the old 'p' contents to free later, nor
1001 to worry if the size parameter was zero. In the case where NULL is returned
1002 we guarentee that p has been freed.
1003
1004 If free later semantics are desired, then pass 'free_old_on_error' as False which
1005 guarentees that the old contents are not freed on error, even if size == 0. To use
1006 this idiom use :
1007
1008 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1009 if (!tmp) {
1010 SAFE_FREE(p);
1011 return error;
1012 } else {
1013 p = tmp;
1014 }
1015
1016 Changes were instigated by Coverity error checking. JRA.
1017 ****************************************************************************/
1018
1019 void *Realloc(void *p, size_t size, bool free_old_on_error)
1020 {
1021 void *ret=NULL;
1022
1023 if (size == 0) {
1024 if (free_old_on_error) {
1025 SAFE_FREE(p);
1026 }
1027 DEBUG(2,("Realloc asked for 0 bytes\n"));
1028 return NULL;
1029 }
1030
1031 #if defined(PARANOID_MALLOC_CHECKER)
1032 if (!p) {
1033 ret = (void *)malloc_(size);
1034 } else {
1035 ret = (void *)realloc_(p,size);
1036 }
1037 #else
1038 if (!p) {
1039 ret = (void *)malloc(size);
1040 } else {
1041 ret = (void *)realloc(p,size);
1042 }
1043 #endif
1044
1045 if (!ret) {
1046 if (free_old_on_error && p) {
1047 SAFE_FREE(p);
1048 }
1049 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1050 }
1051
1052 return(ret);
1053 }
1054
1055 /****************************************************************************
1056 (Hopefully) efficient array append.
1057 ****************************************************************************/
1058
1059 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1060 void *element, void *_array, uint32 *num_elements,
1061 ssize_t *array_size)
1062 {
1063 void **array = (void **)_array;
1064
1065 if (*array_size < 0) {
1066 return;
1067 }
1068
1069 if (*array == NULL) {
1070 if (*array_size == 0) {
1071 *array_size = 128;
1072 }
1073
1074 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1075 goto error;
1076 }
1077
1078 *array = TALLOC(mem_ctx, element_size * (*array_size));
1079 if (*array == NULL) {
1080 goto error;
1081 }
1082 }
1083
1084 if (*num_elements == *array_size) {
1085 *array_size *= 2;
1086
1087 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1088 goto error;
1089 }
1090
1091 *array = TALLOC_REALLOC(mem_ctx, *array,
1092 element_size * (*array_size));
1093
1094 if (*array == NULL) {
1095 goto error;
1096 }
1097 }
1098
1099 memcpy((char *)(*array) + element_size*(*num_elements),
1100 element, element_size);
1101 *num_elements += 1;
1102
1103 return;
1104
1105 error:
1106 *num_elements = 0;
1107 *array_size = -1;
1108 }
1109
1110 /****************************************************************************
1111 Get my own domain name, or "" if we have none.
1112 ****************************************************************************/
1113
1114 char *get_mydnsdomname(TALLOC_CTX *ctx)
1115 {
1116 const char *domname;
1117 char *p;
1118
1119 domname = get_mydnsfullname();
1120 if (!domname) {
1121 return NULL;
1122 }
1123
1124 p = strchr_m(domname, '.');
1125 if (p) {
1126 p++;
1127 return talloc_strdup(ctx, p);
1128 } else {
1129 return talloc_strdup(ctx, "");
1130 }
1131 }
1132
1133 /****************************************************************************
1134 Interpret a protocol description string, with a default.
1135 ****************************************************************************/
1136
1137 int interpret_protocol(const char *str,int def)
1138 {
1139 if (strequal(str,"NT1"))
1140 return(PROTOCOL_NT1);
1141 if (strequal(str,"LANMAN2"))
1142 return(PROTOCOL_LANMAN2);
1143 if (strequal(str,"LANMAN1"))
1144 return(PROTOCOL_LANMAN1);
1145 if (strequal(str,"CORE"))
1146 return(PROTOCOL_CORE);
1147 if (strequal(str,"COREPLUS"))
1148 return(PROTOCOL_COREPLUS);
1149 if (strequal(str,"CORE+"))
1150 return(PROTOCOL_COREPLUS);
1151
1152 DEBUG(0,("Unrecognised protocol level %s\n",str));
1153
1154 return(def);
1155 }
1156
1157
1158 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1159 /******************************************************************
1160 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1161 Based on a fix from <Thomas.Hepper@icem.de>.
1162 Returns a malloc'ed string.
1163 *******************************************************************/
1164
1165 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1166 {
1167 if (*str == '-') {
1168 const char *p = str;
1169 while(*p && !isspace(*p))
1170 p++;
1171 while(*p && isspace(*p))
1172 p++;
1173 if(*p) {
1174 return talloc_strdup(ctx, p);
1175 }
1176 }
1177 return NULL;
1178 }
1179
1180 /*******************************************************************
1181 Patch from jkf@soton.ac.uk
1182 Split Luke's automount_server into YP lookup and string splitter
1183 so can easily implement automount_path().
1184 Returns a malloc'ed string.
1185 *******************************************************************/
1186
1187 #ifdef WITH_NISPLUS_HOME
1188 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1189 {
1190 char *value = NULL;
1191
1192 char *nis_map = (char *)lp_nis_home_map_name();
1193
1194 char buffer[NIS_MAXATTRVAL + 1];
1195 nis_result *result;
1196 nis_object *object;
1197 entry_obj *entry;
1198
1199 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1200 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1201
1202 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1203 if (result->status != NIS_SUCCESS) {
1204 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1205 } else {
1206 object = result->objects.objects_val;
1207 if (object->zo_data.zo_type == ENTRY_OBJ) {
1208 entry = &object->zo_data.objdata_u.en_data;
1209 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1210 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1211
1212 value = talloc_strdup(ctx,
1213 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1214 if (!value) {
1215 nis_freeresult(result);
1216 return NULL;
1217 }
1218 value = talloc_string_sub(ctx,
1219 value,
1220 "&",
1221 user_name);
1222 }
1223 }
1224 }
1225 nis_freeresult(result);
1226
1227 if (value) {
1228 value = strip_mount_options(ctx, value);
1229 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1230 user_name, value));
1231 }
1232 return value;
1233 }
1234 #else /* WITH_NISPLUS_HOME */
1235
1236 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1237 {
1238 char *value = NULL;
1239
1240 int nis_error; /* returned by yp all functions */
1241 char *nis_result; /* yp_match inits this */
1242 int nis_result_len; /* and set this */
1243 char *nis_domain; /* yp_get_default_domain inits this */
1244 char *nis_map = (char *)lp_nis_home_map_name();
1245
1246 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1247 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1248 return NULL;
1249 }
1250
1251 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1252
1253 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1254 strlen(user_name), &nis_result,
1255 &nis_result_len)) == 0) {
1256 if (nis_result_len > 0 && nis_result[nis_result_len] == '\n') {
1257 nis_result[nis_result_len] = '\0';
1258 }
1259 value = talloc_strdup(ctx, nis_result);
1260 if (!value) {
1261 return NULL;
1262 }
1263 value = strip_mount_options(ctx, value);
1264 } else if(nis_error == YPERR_KEY) {
1265 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1266 user_name, nis_map));
1267 DEBUG(3, ("using defaults for server and home directory\n"));
1268 } else {
1269 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1270 yperr_string(nis_error), user_name, nis_map));
1271 }
1272
1273 if (value) {
1274 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1275 }
1276 return value;
1277 }
1278 #endif /* WITH_NISPLUS_HOME */
1279 #endif
1280
1281 /****************************************************************************
1282 Check if a process exists. Does this work on all unixes?
1283 ****************************************************************************/
1284
1285 bool process_exists(const struct server_id pid)
1286 {
1287 if (procid_is_me(&pid)) {
1288 return True;
1289 }
1290
1291 if (procid_is_local(&pid)) {
1292 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1293 }
1294
1295 #ifdef CLUSTER_SUPPORT
1296 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1297 pid.pid);
1298 #else
1299 return False;
1300 #endif
1301 }
1302
1303 /*******************************************************************
1304 Convert a uid into a user name.
1305 ********************************************************************/
1306
1307 const char *uidtoname(uid_t uid)
1308 {
1309 TALLOC_CTX *ctx = talloc_tos();
1310 char *name = NULL;
1311 struct passwd *pass = NULL;
1312
1313 pass = getpwuid_alloc(ctx,uid);
1314 if (pass) {
1315 name = talloc_strdup(ctx,pass->pw_name);
1316 TALLOC_FREE(pass);
1317 } else {
1318 name = talloc_asprintf(ctx,
1319 "%ld",
1320 (long int)uid);
1321 }
1322 return name;
1323 }
1324
1325 /*******************************************************************
1326 Convert a gid into a group name.
1327 ********************************************************************/
1328
1329 char *gidtoname(gid_t gid)
1330 {
1331 struct group *grp;
1332
1333 grp = getgrgid(gid);
1334 if (grp) {
1335 return talloc_strdup(talloc_tos(), grp->gr_name);
1336 }
1337 else {
1338 return talloc_asprintf(talloc_tos(),
1339 "%d",
1340 (int)gid);
1341 }
1342 }
1343
1344 /*******************************************************************
1345 Convert a user name into a uid.
1346 ********************************************************************/
1347
1348 uid_t nametouid(const char *name)
1349 {
1350 struct passwd *pass;
1351 char *p;
1352 uid_t u;
1353
1354 pass = getpwnam_alloc(talloc_autofree_context(), name);
1355 if (pass) {
1356 u = pass->pw_uid;
1357 TALLOC_FREE(pass);
1358 return u;
1359 }
1360
1361 u = (uid_t)strtol(name, &p, 0);
1362 if ((p != name) && (*p == '\0'))
1363 return u;
1364
1365 return (uid_t)-1;
1366 }
1367
1368 /*******************************************************************
1369 Convert a name to a gid_t if possible. Return -1 if not a group.
1370 ********************************************************************/
1371
1372 gid_t nametogid(const char *name)
1373 {
1374 struct group *grp;
1375 char *p;
1376 gid_t g;
1377
1378 g = (gid_t)strtol(name, &p, 0);
1379 if ((p != name) && (*p == '\0'))
1380 return g;
1381
1382 grp = sys_getgrnam(name);
1383 if (grp)
1384 return(grp->gr_gid);
1385 return (gid_t)-1;
1386 }
1387
1388 /*******************************************************************
1389 Something really nasty happened - panic !
1390 ********************************************************************/
1391
1392 void smb_panic(const char *const why)
1393 {
1394 char *cmd;
1395 int result;
1396
1397 #ifdef DEVELOPER
1398 {
1399
1400 if (global_clobber_region_function) {
1401 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1402 global_clobber_region_function,
1403 global_clobber_region_line));
1404 }
1405 }
1406 #endif
1407
1408 DEBUG(0,("PANIC (pid %llu): %s\n",
1409 (unsigned long long)sys_getpid(), why));
1410 log_stack_trace();
1411
1412 cmd = lp_panic_action();
1413 if (cmd && *cmd) {
1414 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1415 result = system(cmd);
1416
1417 if (result == -1)
1418 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1419 strerror(errno)));
1420 else
1421 DEBUG(0, ("smb_panic(): action returned status %d\n",
1422 WEXITSTATUS(result)));
1423 }
1424
1425 dump_core();
1426 }
1427
1428 /*******************************************************************
1429 Print a backtrace of the stack to the debug log. This function
1430 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1431 exit shortly after calling it.
1432 ********************************************************************/
1433
1434 #ifdef HAVE_LIBUNWIND_H
1435 #include <libunwind.h>
1436 #endif
1437
1438 #ifdef HAVE_EXECINFO_H
1439 #include <execinfo.h>
1440 #endif
1441
1442 #ifdef HAVE_LIBEXC_H
1443 #include <libexc.h>
1444 #endif
1445
1446 void log_stack_trace(void)
1447 {
1448 #ifdef HAVE_LIBUNWIND
1449 /* Try to use libunwind before any other technique since on ia64
1450 * libunwind correctly walks the stack in more circumstances than
1451 * backtrace.
1452 */
1453 unw_cursor_t cursor;
1454 unw_context_t uc;
1455 unsigned i = 0;
1456
1457 char procname[256];
1458 unw_word_t ip, sp, off;
1459
1460 procname[sizeof(procname) - 1] = '\0';
1461
1462 if (unw_getcontext(&uc) != 0) {
1463 goto libunwind_failed;
1464 }
1465
1466 if (unw_init_local(&cursor, &uc) != 0) {
1467 goto libunwind_failed;
1468 }
1469
1470 DEBUG(0, ("BACKTRACE:\n"));
1471
1472 do {
1473 ip = sp = 0;
1474 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1475 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1476
1477 switch (unw_get_proc_name(&cursor,
1478 procname, sizeof(procname) - 1, &off) ) {
1479 case 0:
1480 /* Name found. */
1481 case -UNW_ENOMEM:
1482 /* Name truncated. */
1483 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1484 i, procname, (long long)off,
1485 (long long)ip, (long long) sp));
1486 break;
1487 default:
1488 /* case -UNW_ENOINFO: */
1489 /* case -UNW_EUNSPEC: */
1490 /* No symbol name found. */
1491 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1492 i, "<unknown symbol>",
1493 (long long)ip, (long long) sp));
1494 }
1495 ++i;
1496 } while (unw_step(&cursor) > 0);
1497
1498 return;
1499
1500 libunwind_failed:
1501 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1502
1503 #elif HAVE_BACKTRACE_SYMBOLS
1504 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1505 size_t backtrace_size;
1506 char **backtrace_strings;
1507
1508 /* get the backtrace (stack frames) */
1509 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1510 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1511
1512 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1513 (unsigned long)backtrace_size));
1514
1515 if (backtrace_strings) {
1516 int i;
1517
1518 for (i = 0; i < backtrace_size; i++)
1519 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1520
1521 /* Leak the backtrace_strings, rather than risk what free() might do */
1522 }
1523
1524 #elif HAVE_LIBEXC
1525
1526 /* The IRIX libexc library provides an API for unwinding the stack. See
1527 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1528 * since we are about to abort anyway, it hardly matters.
1529 */
1530
1531 #define NAMESIZE 32 /* Arbitrary */
1532
1533 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1534 char * names[BACKTRACE_STACK_SIZE];
1535 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1536
1537 int i;
1538 int levels;
1539
1540 ZERO_ARRAY(addrs);
1541 ZERO_ARRAY(names);
1542 ZERO_ARRAY(namebuf);
1543
1544 /* We need to be root so we can open our /proc entry to walk
1545 * our stack. It also helps when we want to dump core.
1546 */
1547 become_root();
1548
1549 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1550 names[i] = namebuf + (i * NAMESIZE);
1551 }
1552
1553 levels = trace_back_stack(0, addrs, names,
1554 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1555
1556 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1557 for (i = 0; i < levels; i++) {
1558 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1559 }
1560 #undef NAMESIZE
1561
1562 #else
1563 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1564 #endif
1565 }
1566
1567 /*******************************************************************
1568 A readdir wrapper which just returns the file name.
1569 ********************************************************************/
1570
1571 const char *readdirname(SMB_STRUCT_DIR *p)
1572 {
1573 SMB_STRUCT_DIRENT *ptr;
1574 char *dname;
1575
1576 if (!p)
1577 return(NULL);
1578
1579 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1580 if (!ptr)
1581 return(NULL);
1582
1583 dname = ptr->d_name;
1584
1585 #ifdef NEXT2
1586 if (telldir(p) < 0)
1587 return(NULL);
1588 #endif
1589
1590 #ifdef HAVE_BROKEN_READDIR_NAME
1591 /* using /usr/ucb/cc is BAD */
1592 dname = dname - 2;
1593 #endif
1594
1595 return talloc_strdup(talloc_tos(), dname);
1596 }
1597
1598 /*******************************************************************
1599 Utility function used to decide if the last component
1600 of a path matches a (possibly wildcarded) entry in a namelist.
1601 ********************************************************************/
1602
1603 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1604 {
1605 const char *last_component;
1606
1607 /* if we have no list it's obviously not in the path */
1608 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1609 return False;
1610 }
1611
1612 DEBUG(8, ("is_in_path: %s\n", name));
1613
1614 /* Get the last component of the unix name. */
1615 last_component = strrchr_m(name, '/');
1616 if (!last_component) {
1617 last_component = name;
1618 } else {
1619 last_component++; /* Go past '/' */
1620 }
1621
1622 for(; namelist->name != NULL; namelist++) {
1623 if(namelist->is_wild) {
1624 if (mask_match(last_component, namelist->name, case_sensitive)) {
1625 DEBUG(8,("is_in_path: mask match succeeded\n"));
1626 return True;
1627 }
1628 } else {
1629 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1630 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1631 DEBUG(8,("is_in_path: match succeeded\n"));
1632 return True;
1633 }
1634 }
1635 }
1636 DEBUG(8,("is_in_path: match not found\n"));
1637 return False;
1638 }
1639
1640 /*******************************************************************
1641 Strip a '/' separated list into an array of
1642 name_compare_enties structures suitable for
1643 passing to is_in_path(). We do this for
1644 speed so we can pre-parse all the names in the list
1645 and don't do it for each call to is_in_path().
1646 namelist is modified here and is assumed to be
1647 a copy owned by the caller.
1648 We also check if the entry contains a wildcard to
1649 remove a potentially expensive call to mask_match
1650 if possible.
1651 ********************************************************************/
1652
1653 void set_namearray(name_compare_entry **ppname_array, const char *namelist)
1654 {
1655 char *name_end;
1656 char *nameptr = (char *)namelist;
1657 int num_entries = 0;
1658 int i;
1659
1660 (*ppname_array) = NULL;
1661
1662 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1663 return;
1664
1665 /* We need to make two passes over the string. The
1666 first to count the number of elements, the second
1667 to split it.
1668 */
1669
1670 while(*nameptr) {
1671 if ( *nameptr == '/' ) {
1672 /* cope with multiple (useless) /s) */
1673 nameptr++;
1674 continue;
1675 }
1676 /* anything left? */
1677 if ( *nameptr == '\0' )
1678 break;
1679
1680 /* find the next '/' or consume remaining */
1681 name_end = strchr_m(nameptr, '/');
1682 if (name_end == NULL)
1683 name_end = (char *)nameptr + strlen(nameptr);
1684
1685 /* next segment please */
1686 nameptr = name_end + 1;
1687 num_entries++;
1688 }
1689
1690 if(num_entries == 0)
1691 return;
1692
1693 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1694 DEBUG(0,("set_namearray: malloc fail\n"));
1695 return;
1696 }
1697
1698 /* Now copy out the names */
1699 nameptr = (char *)namelist;
1700 i = 0;
1701 while(*nameptr) {
1702 if ( *nameptr == '/' ) {
1703 /* cope with multiple (useless) /s) */
1704 nameptr++;
1705 continue;
1706 }
1707 /* anything left? */
1708 if ( *nameptr == '\0' )
1709 break;
1710
1711 /* find the next '/' or consume remaining */
1712 name_end = strchr_m(nameptr, '/');
1713 if (name_end)
1714 *name_end = '\0';
1715 else
1716 name_end = nameptr + strlen(nameptr);
1717
1718 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1719 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1720 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1721 return;
1722 }
1723
1724 /* next segment please */
1725 nameptr = name_end + 1;
1726 i++;
1727 }
1728
1729 (*ppname_array)[i].name = NULL;
1730
1731 return;
1732 }
1733
1734 /****************************************************************************
1735 Routine to free a namearray.
1736 ****************************************************************************/
1737
1738 void free_namearray(name_compare_entry *name_array)
1739 {
1740 int i;
1741
1742 if(name_array == NULL)
1743 return;
1744
1745 for(i=0; name_array[i].name!=NULL; i++)
1746 SAFE_FREE(name_array[i].name);
1747 SAFE_FREE(name_array);
1748 }
1749
1750 #undef DBGC_CLASS
1751 #define DBGC_CLASS DBGC_LOCKING
1752
1753 /****************************************************************************
1754 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1755 is dealt with in posix.c
1756 Returns True if we have information regarding this lock region (and returns
1757 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1758 ****************************************************************************/
1759
1760 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
1761 {
1762 SMB_STRUCT_FLOCK lock;
1763 int ret;
1764
1765 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1766 fd,(double)*poffset,(double)*pcount,*ptype));
1767
1768 lock.l_type = *ptype;
1769 lock.l_whence = SEEK_SET;
1770 lock.l_start = *poffset;
1771 lock.l_len = *pcount;
1772 lock.l_pid = 0;
1773
1774 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
1775
1776 if (ret == -1) {
1777 int sav = errno;
1778 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1779 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1780 errno = sav;
1781 return False;
1782 }
1783
1784 *ptype = lock.l_type;
1785 *poffset = lock.l_start;
1786 *pcount = lock.l_len;
1787 *ppid = lock.l_pid;
1788
1789 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1790 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1791 return True;
1792 }
1793
1794 #undef DBGC_CLASS
1795 #define DBGC_CLASS DBGC_ALL
1796
1797 /*******************************************************************
1798 Is the name specified one of my netbios names.
1799 Returns true if it is equal, false otherwise.
1800 ********************************************************************/
1801
1802 bool is_myname(const char *s)
1803 {
1804 int n;
1805 bool ret = False;
1806
1807 for (n=0; my_netbios_names(n); n++) {
1808 if (strequal(my_netbios_names(n), s)) {
1809 ret=True;
1810 break;
1811 }
1812 }
1813 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1814 return(ret);
1815 }
1816
1817 /*******************************************************************
1818 Is the name specified our workgroup/domain.
1819 Returns true if it is equal, false otherwise.
1820 ********************************************************************/
1821
1822 bool is_myworkgroup(const char *s)
1823 {
1824 bool ret = False;
1825
1826 if (strequal(s, lp_workgroup())) {
1827 ret=True;
1828 }
1829
1830 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1831 return(ret);
1832 }
1833
1834 /*******************************************************************
1835 we distinguish between 2K and XP by the "Native Lan Manager" string
1836 WinXP => "Windows 2002 5.1"
1837 WinXP 64bit => "Windows XP 5.2"
1838 Win2k => "Windows 2000 5.0"
1839 NT4 => "Windows NT 4.0"
1840 Win9x => "Windows 4.0"
1841 Windows 2003 doesn't set the native lan manager string but
1842 they do set the domain to "Windows 2003 5.2" (probably a bug).
1843 ********************************************************************/
1844
1845 void ra_lanman_string( const char *native_lanman )
1846 {
1847 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1848 set_remote_arch( RA_WINXP );
1849 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1850 set_remote_arch( RA_WINXP64 );
1851 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1852 set_remote_arch( RA_WIN2K3 );
1853 }
1854
1855 static const char *remote_arch_str;
1856
1857 const char *get_remote_arch_str(void)
1858 {
1859 if (!remote_arch_str) {
1860 return "UNKNOWN";
1861 }
1862 return remote_arch_str;
1863 }
1864
1865 /*******************************************************************
1866 Set the horrid remote_arch string based on an enum.
1867 ********************************************************************/
1868
1869 void set_remote_arch(enum remote_arch_types type)
1870 {
1871 ra_type = type;
1872 switch( type ) {
1873 case RA_WFWG:
1874 remote_arch_str = "WfWg";
1875 break;
1876 case RA_OS2:
1877 remote_arch_str = "OS2";
1878 break;
1879 case RA_WIN95:
1880 remote_arch_str = "Win95";
1881 break;
1882 case RA_WINNT:
1883 remote_arch_str = "WinNT";
1884 break;
1885 case RA_WIN2K:
1886 remote_arch_str = "Win2K";
1887 break;
1888 case RA_WINXP:
1889 remote_arch_str = "WinXP";
1890 break;
1891 case RA_WINXP64:
1892 remote_arch_str = "WinXP64";
1893 break;
1894 case RA_WIN2K3:
1895 remote_arch_str = "Win2K3";
1896 break;
1897 case RA_VISTA:
1898 remote_arch_str = "Vista";
1899 break;
1900 case RA_SAMBA:
1901 remote_arch_str = "Samba";
1902 break;
1903 case RA_CIFSFS:
1904 remote_arch_str = "CIFSFS";
1905 break;
1906 default:
1907 ra_type = RA_UNKNOWN;
1908 remote_arch_str = "UNKNOWN";
1909 break;
1910 }
1911
1912 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1913 remote_arch_str));
1914 }
1915
1916 /*******************************************************************
1917 Get the remote_arch type.
1918 ********************************************************************/
1919
1920 enum remote_arch_types get_remote_arch(void)
1921 {
1922 return ra_type;
1923 }
1924
1925 const char *tab_depth(int level, int depth)
1926 {
1927 if( CHECK_DEBUGLVL(level) ) {
1928 dbgtext("%*s", depth*4, "");
1929 }
1930 return "";
1931 }
1932
1933 /*****************************************************************************
1934 Provide a checksum on a string
1935
1936 Input: s - the null-terminated character string for which the checksum
1937 will be calculated.
1938
1939 Output: The checksum value calculated for s.
1940 *****************************************************************************/
1941
1942 int str_checksum(const char *s)
1943 {
1944 int res = 0;
1945 int c;
1946 int i=0;
1947
1948 while(*s) {
1949 c = *s;
1950 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
1951 s++;
1952 i++;
1953 }
1954 return(res);
1955 }
1956
1957 /*****************************************************************
1958 Zero a memory area then free it. Used to catch bugs faster.
1959 *****************************************************************/
1960
1961 void zero_free(void *p, size_t size)
1962 {
1963 memset(p, 0, size);
1964 SAFE_FREE(p);
1965 }
1966
1967 /*****************************************************************
1968 Set our open file limit to a requested max and return the limit.
1969 *****************************************************************/
1970
1971 int set_maxfiles(int requested_max)
1972 {
1973 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1974 struct rlimit rlp;
1975 int saved_current_limit;
1976
1977 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1978 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1979 strerror(errno) ));
1980 /* just guess... */
1981 return requested_max;
1982 }
1983
1984 /*
1985 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1986 * account for the extra fd we need
1987 * as well as the log files and standard
1988 * handles etc. Save the limit we want to set in case
1989 * we are running on an OS that doesn't support this limit (AIX)
1990 * which always returns RLIM_INFINITY for rlp.rlim_max.
1991 */
1992
1993 /* Try raising the hard (max) limit to the requested amount. */
1994
1995 #if defined(RLIM_INFINITY)
1996 if (rlp.rlim_max != RLIM_INFINITY) {
1997 int orig_max = rlp.rlim_max;
1998
1999 if ( rlp.rlim_max < requested_max )
2000 rlp.rlim_max = requested_max;
2001
2002 /* This failing is not an error - many systems (Linux) don't
2003 support our default request of 10,000 open files. JRA. */
2004
2005 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2006 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2007 (int)rlp.rlim_max, strerror(errno) ));
2008
2009 /* Set failed - restore original value from get. */
2010 rlp.rlim_max = orig_max;
2011 }
2012 }
2013 #endif
2014
2015 /* Now try setting the soft (current) limit. */
2016
2017 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2018
2019 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2020 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2021 (int)rlp.rlim_cur, strerror(errno) ));
2022 /* just guess... */
2023 return saved_current_limit;
2024 }
2025
2026 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2027 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2028 strerror(errno) ));
2029 /* just guess... */
2030 return saved_current_limit;
2031 }
2032
2033 #if defined(RLIM_INFINITY)
2034 if(rlp.rlim_cur == RLIM_INFINITY)
2035 return saved_current_limit;
2036 #endif
2037
2038 if((int)rlp.rlim_cur > saved_current_limit)
2039 return saved_current_limit;
2040
2041 return rlp.rlim_cur;
2042 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2043 /*
2044 * No way to know - just guess...
2045 */
2046 return requested_max;
2047 #endif
2048 }
2049
2050 /*****************************************************************
2051 malloc that aborts with smb_panic on fail or zero size.
2052 *****************************************************************/
2053
2054 void *smb_xmalloc_array(size_t size, unsigned int count)
2055 {
2056 void *p;
2057 if (size == 0) {
2058 smb_panic("smb_xmalloc_array: called with zero size");
2059 }
2060 if (count >= MAX_ALLOC_SIZE/size) {
2061 smb_panic("smb_xmalloc_array: alloc size too large");
2062 }
2063 if ((p = SMB_MALLOC(size*count)) == NULL) {
2064 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2065 (unsigned long)size, (unsigned long)count));
2066 smb_panic("smb_xmalloc_array: malloc failed");
2067 }
2068 return p;
2069 }
2070
2071 /*
2072 vasprintf that aborts on malloc fail
2073 */
2074
2075 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2076 {
2077 int n;
2078 va_list ap2;
2079
2080 va_copy(ap2, ap);
2081
2082 n = vasprintf(ptr, format, ap2);
2083 va_end(ap2);
2084 if (n == -1 || ! *ptr) {
2085 smb_panic("smb_xvasprintf: out of memory");
2086 }
2087 return n;
2088 }
2089
2090 /*****************************************************************
2091 Get local hostname and cache result.
2092 *****************************************************************/
2093
2094 char *myhostname(void)
2095 {
2096 static char *ret;
2097 if (ret == NULL) {
2098 /* This is cached forever so
2099 * use talloc_autofree_context() ctx. */
2100 ret = get_myname(talloc_autofree_context());
2101 }
2102 return ret;
2103 }
2104
2105 /**
2106 * @brief Returns an absolute path to a file concatenating the provided
2107 * @a rootpath and @a basename
2108 *
2109 * @param name Filename, relative to @a rootpath
2110 *
2111 * @retval Pointer to a string containing the full path.
2112 **/
2113
2114 static char *xx_path(const char *name, const char *rootpath)
2115 {
2116 char *fname = NULL;
2117
2118 fname = talloc_strdup(talloc_tos(), rootpath);
2119 if (!fname) {
2120 return NULL;
2121 }
2122 trim_string(fname,"","/");
2123
2124 if (!directory_exist(fname)) {
2125 if (!mkdir(fname,0755))
2126 DEBUG(1, ("Unable to create directory %s for file %s. "
2127 "Error was %s\n", fname, name, strerror(errno)));
2128 }
2129
2130 return talloc_asprintf(talloc_tos(),
2131 "%s/%s",
2132 fname,
2133 name);
2134 }
2135
2136 /**
2137 * @brief Returns an absolute path to a file in the Samba lock directory.
2138 *
2139 * @param name File to find, relative to LOCKDIR.
2140 *
2141 * @retval Pointer to a talloc'ed string containing the full path.
2142 **/
2143
2144 char *lock_path(const char *name)
2145 {
2146 return xx_path(name, lp_lockdir());
2147 }
2148
2149 /**
2150 * @brief Returns an absolute path to a file in the Samba pid directory.
2151 *
2152 * @param name File to find, relative to PIDDIR.
2153 *
2154 * @retval Pointer to a talloc'ed string containing the full path.
2155 **/
2156
2157 char *pid_path(const char *name)
2158 {
2159 return xx_path(name, lp_piddir());
2160 }
2161
2162 /**
2163 * @brief Returns an absolute path to a file in the Samba lib directory.
2164 *
2165 * @param name File to find, relative to LIBDIR.
2166 *
2167 * @retval Pointer to a string containing the full path.
2168 **/
2169
2170 char *lib_path(const char *name)
2171 {
2172 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2173 }
2174
2175 /**
2176 * @brief Returns an absolute path to a file in the Samba modules directory.
2177 *
2178 * @param name File to find, relative to MODULESDIR.
2179 *
2180 * @retval Pointer to a string containing the full path.
2181 **/
2182
2183 char *modules_path(const char *name)
2184 {
2185 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2186 }
2187
2188 /**
2189 * @brief Returns an absolute path to a file in the Samba data directory.
2190 *
2191 * @param name File to find, relative to CODEPAGEDIR.
2192 *
2193 * @retval Pointer to a talloc'ed string containing the full path.
2194 **/
2195
2196 char *data_path(const char *name)
2197 {
2198 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2199 }
2200
2201 /**
2202 * @brief Returns an absolute path to a file in the Samba state directory.
2203 *
2204 * @param name File to find, relative to STATEDIR.
2205 *
2206 * @retval Pointer to a talloc'ed string containing the full path.
2207 **/
2208
2209 char *state_path(const char *name)
2210 {
2211 return xx_path(name, lp_statedir());
2212 }
2213
2214 /**
2215 * @brief Returns an absolute path to a file in the Samba cache directory.
2216 *
2217 * @param name File to find, relative to CACHEDIR.
2218 *
2219 * @retval Pointer to a talloc'ed string containing the full path.
2220 **/
2221
2222 char *cache_path(const char *name)
2223 {
2224 return xx_path(name, lp_cachedir());
2225 }
2226
2227 /**
2228 * @brief Returns the platform specific shared library extension.
2229 *
2230 * @retval Pointer to a const char * containing the extension.
2231 **/
2232
2233 const char *shlib_ext(void)
2234 {
2235 return get_dyn_SHLIBEXT();
2236 }
2237
2238 /*******************************************************************
2239 Given a filename - get its directory name
2240 ********************************************************************/
2241
2242 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
2243 const char **name)
2244 {
2245 char *p;
2246 ptrdiff_t len;
2247
2248 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2249
2250 if (p == NULL) {
2251 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2252 return False;
2253 }
2254 if (name) {
2255 *name = dir;
2256 }
2257 return True;
2258 }
2259
2260 len = p-dir;
2261
2262 if (!(*parent = (char *)TALLOC_MEMDUP(mem_ctx, dir, len+1))) {
2263 return False;
2264 }
2265 (*parent)[len] = '\0';
2266
2267 if (name) {
2268 *name = p+1;
2269 }
2270 return True;
2271 }
2272
2273 /*******************************************************************
2274 Determine if a pattern contains any Microsoft wildcard characters.
2275 *******************************************************************/
2276
2277 bool ms_has_wild(const char *s)
2278 {
2279 char c;
2280
2281 if (lp_posix_pathnames()) {
2282 /* With posix pathnames no characters are wild. */
2283 return False;
2284 }
2285
2286 while ((c = *s++)) {
2287 switch (c) {
2288 case '*':
2289 case '?':
2290 case '<':
2291 case '>':
2292 case '"':
2293 return True;
2294 }
2295 }
2296 return False;
2297 }
2298
2299 bool ms_has_wild_w(const smb_ucs2_t *s)
2300 {
2301 smb_ucs2_t c;
2302 if (!s) return False;
2303 while ((c = *s++)) {
2304 switch (c) {
2305 case UCS2_CHAR('*'):
2306 case UCS2_CHAR('?'):
2307 case UCS2_CHAR('<'):
2308 case UCS2_CHAR('>'):
2309 case UCS2_CHAR('"'):
2310 return True;
2311 }
2312 }
2313 return False;
2314 }
2315
2316 /*******************************************************************
2317 A wrapper that handles case sensitivity and the special handling
2318 of the ".." name.
2319 *******************************************************************/
2320
2321 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2322 {
2323 if (ISDOTDOT(string))
2324 string = ".";
2325 if (ISDOT(pattern))
2326 return False;
2327
2328 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2329 }
2330
2331 /*******************************************************************
2332 A wrapper that handles case sensitivity and the special handling
2333 of the ".." name. Varient that is only called by old search code which requires
2334 pattern translation.
2335 *******************************************************************/
2336
2337 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2338 {
2339 if (ISDOTDOT(string))
2340 string = ".";
2341 if (ISDOT(pattern))
2342 return False;
2343
2344 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2345 }
2346
2347 /*******************************************************************
2348 A wrapper that handles a list of patters and calls mask_match()
2349 on each. Returns True if any of the patterns match.
2350 *******************************************************************/
2351
2352 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2353 {
2354 while (listLen-- > 0) {
2355 if (mask_match(string, *list++, is_case_sensitive))
2356 return True;
2357 }
2358 return False;
2359 }
2360
2361 /*********************************************************
2362 Recursive routine that is called by unix_wild_match.
2363 *********************************************************/
2364
2365 static bool unix_do_match(const char *regexp, const char *str)
2366 {
2367 const char *p;
2368
2369 for( p = regexp; *p && *str; ) {
2370
2371 switch(*p) {
2372 case '?':
2373 str++;
2374 p++;
2375 break;
2376
2377 case '*':
2378
2379 /*
2380 * Look for a character matching
2381 * the one after the '*'.
2382 */
2383 p++;
2384 if(!*p)
2385 return true; /* Automatic match */
2386 while(*str) {
2387
2388 while(*str && (*p != *str))
2389 str++;
2390
2391 /*
2392 * Patch from weidel@multichart.de. In the case of the regexp
2393 * '*XX*' we want to ensure there are at least 2 'X' characters
2394 * in the string after the '*' for a match to be made.
2395 */
2396
2397 {
2398 int matchcount=0;
2399
2400 /*
2401 * Eat all the characters that match, but count how many there were.
2402 */
2403
2404 while(*str && (*p == *str)) {
2405 str++;
2406 matchcount++;
2407 }
2408
2409 /*
2410 * Now check that if the regexp had n identical characters that
2411 * matchcount had at least that many matches.
2412 */
2413
2414 while ( *(p+1) && (*(p+1) == *p)) {
2415 p++;
2416 matchcount--;
2417 }
2418
2419 if ( matchcount <= 0 )
2420 return false;
2421 }
2422
2423 str--; /* We've eaten the match char after the '*' */
2424
2425 if(unix_do_match(p, str))
2426 return true;
2427
2428 if(!*str)
2429 return false;
2430 else
2431 str++;
2432 }
2433 return false;
2434
2435 default:
2436 if(*str != *p)
2437 return false;
2438 str++;
2439 p++;
2440 break;
2441 }
2442 }
2443
2444 if(!*p && !*str)
2445 return true;
2446
2447 if (!*p && str[0] == '.' && str[1] == 0)
2448 return true;
2449
2450 if (!*str && *p == '?') {
2451 while (*p == '?')
2452 p++;
2453 return(!*p);
2454 }
2455
2456 if(!*str && (*p == '*' && p[1] == '\0'))
2457 return true;
2458
2459 return false;
2460 }
2461
2462 /*******************************************************************
2463 Simple case insensitive interface to a UNIX wildcard matcher.
2464 Returns True if match, False if not.
2465 *******************************************************************/
2466
2467 bool unix_wild_match(const char *pattern, const char *string)
2468 {
2469 TALLOC_CTX *ctx = talloc_stackframe();
2470 char *p2;
2471 char *s2;
2472 char *p;
2473 bool ret = false;
2474
2475 p2 = talloc_strdup(ctx,pattern);
2476 s2 = talloc_strdup(ctx,string);
2477 if (!p2 || !s2) {
2478 TALLOC_FREE(ctx);
2479 return false;
2480 }
2481 strlower_m(p2);
2482 strlower_m(s2);
2483
2484 /* Remove any *? and ** from the pattern as they are meaningless */
2485 for(p = p2; *p; p++) {
2486 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2487 memmove(&p[1], &p[2], strlen(&p[2])+1);
2488 }
2489 }
2490
2491 if (strequal(p2,"*")) {
2492 TALLOC_FREE(ctx);
2493 return true;
2494 }
2495
2496 ret = unix_do_match(p2, s2);
2497 TALLOC_FREE(ctx);
2498 return ret;
2499 }
2500
2501 /**********************************************************************
2502 Converts a name to a fully qualified domain name.
2503 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2504 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2505 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2506 ***********************************************************************/
2507
2508 bool name_to_fqdn(fstring fqdn, const char *name)
2509 {
2510 char *full = NULL;
2511 struct hostent *hp = gethostbyname(name);
2512
2513 if (!hp || !hp->h_name || !*hp->h_name) {
2514 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2515 fstrcpy(fqdn, name);
2516 return false;
2517 }
2518
2519 /* Find out if the fqdn is returned as an alias
2520 * to cope with /etc/hosts files where the first
2521 * name is not the fqdn but the short name */
2522 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2523 int i;
2524 for (i = 0; hp->h_aliases[i]; i++) {
2525 if (strchr_m(hp->h_aliases[i], '.')) {
2526 full = hp->h_aliases[i];
2527 break;
2528 }
2529 }
2530 }
2531 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2532 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2533 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2534 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2535 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2536 full = hp->h_name;
2537 }
2538 if (!full) {
2539 full = hp->h_name;
2540 }
2541
2542 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2543 fstrcpy(fqdn, full);
2544 return true;
2545 }
2546
2547 /**********************************************************************
2548 Append a DATA_BLOB to a talloc'ed object
2549 ***********************************************************************/
2550
2551 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
2552 {
2553 size_t old_size = 0;
2554 char *result;
2555
2556 if (blob.length == 0) {
2557 return buf;
2558 }
2559
2560 if (buf != NULL) {
2561 old_size = talloc_get_size(buf);
2562 }
2563
2564 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
2565 if (result == NULL) {
2566 return NULL;
2567 }
2568
2569 memcpy(result + old_size, blob.data, blob.length);
2570 return result;
2571 }
2572
2573 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2574 {
2575 switch (share_access & ~FILE_SHARE_DELETE) {
2576 case FILE_SHARE_NONE:
2577 return DENY_ALL;
2578 case FILE_SHARE_READ:
2579 return DENY_WRITE;
2580 case FILE_SHARE_WRITE:
2581 return DENY_READ;
2582 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2583 return DENY_NONE;
2584 }
2585 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2586 return DENY_DOS;
2587 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2588 return DENY_FCB;
2589 }
2590
2591 return (uint32)-1;
2592 }
2593
2594 pid_t procid_to_pid(const struct server_id *proc)
2595 {
2596 return proc->pid;
2597 }
2598
2599 static uint32 my_vnn = NONCLUSTER_VNN;
2600
2601 void set_my_vnn(uint32 vnn)
2602 {
2603 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
2604 my_vnn = vnn;
2605 }
2606
2607 uint32 get_my_vnn(void)
2608 {
2609 return my_vnn;
2610 }
2611
2612 static uint64_t my_unique_id = 0;
2613
2614 void set_my_unique_id(uint64_t unique_id)
2615 {
2616 my_unique_id = unique_id;
2617 }
2618
2619 struct server_id pid_to_procid(pid_t pid)
2620 {
2621 struct server_id result;
2622 result.pid = pid;
2623 result.unique_id = my_unique_id;
2624 #ifdef CLUSTER_SUPPORT
2625 result.vnn = my_vnn;
2626 #endif
2627 return result;
2628 }
2629
2630 struct server_id procid_self(void)
2631 {
2632 return pid_to_procid(sys_getpid());
2633 }
2634
2635 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
2636 {
2637 if (p1->pid != p2->pid)
2638 return False;
2639 #ifdef CLUSTER_SUPPORT
2640 if (p1->vnn != p2->vnn)
2641 return False;
2642 #endif
2643 return True;
2644 }
2645
2646 bool cluster_id_equal(const struct server_id *id1,
2647 const struct server_id *id2)
2648 {
2649 return procid_equal(id1, id2);
2650 }
2651
2652 bool procid_is_me(const struct server_id *pid)
2653 {
2654 if (pid->pid != sys_getpid())
2655 return False;
2656 #ifdef CLUSTER_SUPPORT
2657 if (pid->vnn != my_vnn)
2658 return False;
2659 #endif
2660 return True;
2661 }
2662
2663 struct server_id interpret_pid(const char *pid_string)
2664 {
2665 struct server_id result;
2666 int pid;
2667 #ifdef CLUSTER_SUPPORT
2668 unsigned int vnn;
2669 if (sscanf(pid_string, "%u:%d", &vnn, &pid) == 2) {
2670 result.vnn = vnn;
2671 result.pid = pid;
2672 }
2673 else if (sscanf(pid_string, "%d", &pid) == 1) {
2674 result.vnn = get_my_vnn();
2675 result.pid = pid;
2676 }
2677 else {
2678 result.vnn = NONCLUSTER_VNN;
2679 result.pid = -1;
2680 }
2681 #else
2682 if (sscanf(pid_string, "%d", &pid) != 1) {
2683 result.pid = -1;
2684 } else {
2685 result.pid = pid;
2686 }
2687 #endif
2688 /* Assigning to result.pid may have overflowed
2689 Map negative pid to -1: i.e. error */
2690 if (result.pid < 0) {
2691 result.pid = -1;
2692 }
2693 result.unique_id = 0;
2694 return result;
2695 }
2696
2697 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
2698 {
2699 #ifdef CLUSTER_SUPPORT
2700 if (pid->vnn == NONCLUSTER_VNN) {
2701 return talloc_asprintf(mem_ctx,
2702 "%d",
2703 (int)pid->pid);
2704 }
2705 else {
2706 return talloc_asprintf(mem_ctx,
2707 "%u:%d",
2708 (unsigned)pid->vnn,
2709 (int)pid->pid);
2710 }
2711 #else
2712 return talloc_asprintf(mem_ctx,
2713 "%d",
2714 (int)pid->pid);
2715 #endif
2716 }
2717
2718 char *procid_str_static(const struct server_id *pid)
2719 {
2720 return procid_str(talloc_tos(), pid);
2721 }
2722
2723 bool procid_valid(const struct server_id *pid)
2724 {
2725 return (pid->pid != -1);
2726 }
2727
2728 bool procid_is_local(const struct server_id *pid)
2729 {
2730 #ifdef CLUSTER_SUPPORT
2731 return pid->vnn == my_vnn;
2732 #else
2733 return True;
2734 #endif
2735 }
2736
2737 int this_is_smp(void)
2738 {
2739 #if defined(HAVE_SYSCONF)
2740
2741 #if defined(SYSCONF_SC_NPROC_ONLN)
2742 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
2743 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
2744 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
2745 #else
2746 return 0;
2747 #endif
2748
2749 #else
2750 return 0;
2751 #endif
2752 }
2753
2754 /****************************************************************
2755 Check if offset/length fit into bufsize. Should probably be
2756 merged with is_offset_safe, but this would require a rewrite
2757 of lanman.c. Later :-)
2758 ****************************************************************/
2759
2760 bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
2761 {
2762 if ((offset + length < offset) || (offset + length < length)) {
2763 /* wrap */
2764 return true;
2765 }
2766 if ((offset > bufsize) || (offset + length > bufsize)) {
2767 /* overflow */
2768 return true;
2769 }
2770 return false;
2771 }
2772
2773 /****************************************************************
2774 Check if an offset into a buffer is safe.
2775 If this returns True it's safe to indirect into the byte at
2776 pointer ptr+off.
2777 ****************************************************************/
2778
2779 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2780 {
2781 const char *end_base = buf_base + buf_len;
2782 char *end_ptr = ptr + off;
2783
2784 if (!buf_base || !ptr) {
2785 return False;
2786 }
2787
2788 if (end_base < buf_base || end_ptr < ptr) {
2789 return False; /* wrap. */
2790 }
2791
2792 if (end_ptr < end_base) {
2793 return True;
2794 }
2795 return False;
2796 }
2797
2798 /****************************************************************
2799 Return a safe pointer into a buffer, or NULL.
2800 ****************************************************************/
2801
2802 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2803 {
2804 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2805 ptr + off : NULL;
2806 }
2807
2808 /****************************************************************
2809 Return a safe pointer into a string within a buffer, or NULL.
2810 ****************************************************************/
2811
2812 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2813 {
2814 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2815 return NULL;
2816 }
2817 /* Check if a valid string exists at this offset. */
2818 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2819 return NULL;
2820 }
2821 return ptr + off;
2822 }
2823
2824 /****************************************************************
2825 Return an SVAL at a pointer, or failval if beyond the end.
2826 ****************************************************************/
2827
2828 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2829 {
2830 /*
2831 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2832 * NOT ptr[2].
2833 */
2834 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2835 return failval;
2836 }
2837 return SVAL(ptr,off);
2838 }
2839
2840 /****************************************************************
2841 Return an IVAL at a pointer, or failval if beyond the end.
2842 ****************************************************************/
2843
2844 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2845 {
2846 /*
2847 * Note we use off+3 here, not off+4 as IVAL accesses
2848 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2849 */
2850 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2851 return failval;
2852 }
2853 return IVAL(ptr,off);
2854 }
2855
2856 /****************************************************************
2857 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2858 call (they take care of winbind separator and other winbind specific settings).
2859 ****************************************************************/
2860
2861 void split_domain_user(TALLOC_CTX *mem_ctx,
2862 const char *full_name,
2863 char **domain,
2864 char **user)
2865 {
2866 const char *p = NULL;
2867
2868 p = strchr_m(full_name, '\\');
2869
2870 if (p != NULL) {
2871 *domain = talloc_strndup(mem_ctx, full_name,
2872 PTR_DIFF(p, full_name));
2873 *user = talloc_strdup(mem_ctx, p+1);
2874 } else {
2875 *domain = talloc_strdup(mem_ctx, "");
2876 *user = talloc_strdup(mem_ctx, full_name);
2877 }
2878 }
2879
2880 #if 0
2881
2882 Disable these now we have checked all code paths and ensured
2883 NULL returns on zero request. JRA.
2884
2885 /****************************************************************
2886 talloc wrapper functions that guarentee a null pointer return
2887 if size == 0.
2888 ****************************************************************/
2889
2890 #ifndef MAX_TALLOC_SIZE
2891 #define MAX_TALLOC_SIZE 0x10000000
2892 #endif
2893
2894 /*
2895 * talloc and zero memory.
2896 * - returns NULL if size is zero.
2897 */
2898
2899 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
2900 {
2901 void *p;
2902
2903 if (size == 0) {
2904 return NULL;
2905 }
2906
2907 p = talloc_named_const(ctx, size, name);
2908
2909 if (p) {
2910 memset(p, '\0', size);
2911 }
2912
2913 return p;
2914 }
2915
2916 /*
2917 * memdup with a talloc.
2918 * - returns NULL if size is zero.
2919 */
2920
2921 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
2922 {
2923 void *newp;
2924
2925 if (size == 0) {
2926 return NULL;
2927 }
2928
2929 newp = talloc_named_const(t, size, name);
2930 if (newp) {
2931 memcpy(newp, p, size);
2932 }
2933
2934 return newp;
2935 }
2936
2937 /*
2938 * alloc an array, checking for integer overflow in the array size.
2939 * - returns NULL if count or el_size are zero.
2940 */
2941
2942 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2943 {
2944 if (count >= MAX_TALLOC_SIZE/el_size) {
2945 return NULL;
2946 }
2947
2948 if (el_size == 0 || count == 0) {
2949 return NULL;
2950 }
2951
2952 return talloc_named_const(ctx, el_size * count, name);
2953 }
2954
2955 /*
2956 * alloc an zero array, checking for integer overflow in the array size
2957 * - returns NULL if count or el_size are zero.
2958 */
2959
2960 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2961 {
2962 if (count >= MAX_TALLOC_SIZE/el_size) {
2963 return NULL;
2964 }
2965
2966 if (el_size == 0 || count == 0) {
2967 return NULL;
2968 }
2969
2970 return _talloc_zero(ctx, el_size * count, name);
2971 }
2972
2973 /*
2974 * Talloc wrapper that returns NULL if size == 0.
2975 */
2976 void *talloc_zeronull(const void *context, size_t size, const char *name)
2977 {
2978 if (size == 0) {
2979 return NULL;
2980 }
2981 return talloc_named_const(context, size, name);
2982 }
2983 #endif
2984
2985 bool is_valid_policy_hnd(const struct policy_handle *hnd)
2986 {
2987 struct policy_handle tmp;
2988 ZERO_STRUCT(tmp);
2989 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
2990 }
2991
2992 bool policy_hnd_equal(const struct policy_handle *hnd1,
2993 const struct policy_handle *hnd2)
2994 {
2995 if (!hnd1 || !hnd2) {
2996 return false;
2997 }
2998
2999 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
3000 }
3001
3002 /****************************************************************
3003 strip off leading '\\' from a hostname
3004 ****************************************************************/
3005
3006 const char *strip_hostname(const char *s)
3007 {
3008 if (!s) {
3009 return NULL;
3010 }
3011
3012 if (strlen_m(s) < 3) {
3013 return s;
3014 }
3015
3016 if (s[0] == '\\') s++;
3017 if (s[0] == '\\') s++;
3018
3019 return s;
3020 }
3021
3022 bool tevent_req_poll_ntstatus(struct tevent_req *req,
3023 struct tevent_context *ev,
3024 NTSTATUS *status)
3025 {
3026 bool ret = tevent_req_poll(req, ev);
3027 if (!ret) {
3028 *status = map_nt_error_from_unix(errno);
3029 }
3030 return ret;
3031 }
reg import