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s3/profiling: don't use CLOCK_PROCESS_CPUTIME_ID
[Samba/gebeck_regimport.git] / source3 / lib / util.c
blob3303894e0e50c7b807de90ed9dc435422ef4c88e
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 #include "popt_common.h"
26 #include "secrets.h"
27
28 extern char *global_clobber_region_function;
29 extern unsigned int global_clobber_region_line;
30
31 /* Max allowable allococation - 256mb - 0x10000000 */
32 #define MAX_ALLOC_SIZE (1024*1024*256)
33
34 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
35 #ifdef WITH_NISPLUS_HOME
36 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
37 /*
38 * The following lines are needed due to buggy include files
39 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
40 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
41 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
42 * an enum in /usr/include/rpcsvc/nis.h.
43 */
44
45 #if defined(GROUP)
46 #undef GROUP
47 #endif
48
49 #if defined(GROUP_OBJ)
50 #undef GROUP_OBJ
51 #endif
52
53 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
54
55 #include <rpcsvc/nis.h>
56
57 #endif /* WITH_NISPLUS_HOME */
58 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
59
60 static enum protocol_types Protocol = PROTOCOL_COREPLUS;
61
62 enum protocol_types get_Protocol(void)
63 {
64 return Protocol;
65 }
66
67 void set_Protocol(enum protocol_types p)
68 {
69 Protocol = p;
70 }
71
72 static enum remote_arch_types ra_type = RA_UNKNOWN;
73
74 /***********************************************************************
75 Definitions for all names.
76 ***********************************************************************/
77
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 scope. Ensure upper case.
84 ***********************************************************************/
85
86 bool set_global_scope(const char *scope)
87 {
88 SAFE_FREE(smb_scope);
89 smb_scope = SMB_STRDUP(scope);
90 if (!smb_scope)
91 return False;
92 strupper_m(smb_scope);
93 return True;
94 }
95
96 /*********************************************************************
97 Ensure scope is never null string.
98 *********************************************************************/
99
100 const char *global_scope(void)
101 {
102 if (!smb_scope)
103 set_global_scope("");
104 return smb_scope;
105 }
106
107 static void free_netbios_names_array(void)
108 {
109 int i;
110
111 for (i = 0; i < smb_num_netbios_names; i++)
112 SAFE_FREE(smb_my_netbios_names[i]);
113
114 SAFE_FREE(smb_my_netbios_names);
115 smb_num_netbios_names = 0;
116 }
117
118 static bool allocate_my_netbios_names_array(size_t number)
119 {
120 free_netbios_names_array();
121
122 smb_num_netbios_names = number + 1;
123 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
124
125 if (!smb_my_netbios_names)
126 return False;
127
128 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
129 return True;
130 }
131
132 static bool set_my_netbios_names(const char *name, int i)
133 {
134 SAFE_FREE(smb_my_netbios_names[i]);
135
136 smb_my_netbios_names[i] = SMB_STRDUP(name);
137 if (!smb_my_netbios_names[i])
138 return False;
139 strupper_m(smb_my_netbios_names[i]);
140 return True;
141 }
142
143 /***********************************************************************
144 Free memory allocated to global objects
145 ***********************************************************************/
146
147 void gfree_names(void)
148 {
149 gfree_netbios_names();
150 SAFE_FREE( smb_scope );
151 free_netbios_names_array();
152 free_local_machine_name();
153 }
154
155 void gfree_all( void )
156 {
157 gfree_names();
158 gfree_loadparm();
159 gfree_case_tables();
160 gfree_charcnv();
161 gfree_interfaces();
162 gfree_debugsyms();
163 }
164
165 const char *my_netbios_names(int i)
166 {
167 return smb_my_netbios_names[i];
168 }
169
170 bool set_netbios_aliases(const char **str_array)
171 {
172 size_t namecount;
173
174 /* Work out the max number of netbios aliases that we have */
175 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
176 ;
177
178 if ( global_myname() && *global_myname())
179 namecount++;
180
181 /* Allocate space for the netbios aliases */
182 if (!allocate_my_netbios_names_array(namecount))
183 return False;
184
185 /* Use the global_myname string first */
186 namecount=0;
187 if ( global_myname() && *global_myname()) {
188 set_my_netbios_names( global_myname(), namecount );
189 namecount++;
190 }
191
192 if (str_array) {
193 size_t i;
194 for ( i = 0; str_array[i] != NULL; i++) {
195 size_t n;
196 bool duplicate = False;
197
198 /* Look for duplicates */
199 for( n=0; n<namecount; n++ ) {
200 if( strequal( str_array[i], my_netbios_names(n) ) ) {
201 duplicate = True;
202 break;
203 }
204 }
205 if (!duplicate) {
206 if (!set_my_netbios_names(str_array[i], namecount))
207 return False;
208 namecount++;
209 }
210 }
211 }
212 return True;
213 }
214
215 /****************************************************************************
216 Common name initialization code.
217 ****************************************************************************/
218
219 bool init_names(void)
220 {
221 int n;
222
223 if (global_myname() == NULL || *global_myname() == '\0') {
224 if (!set_global_myname(myhostname())) {
225 DEBUG( 0, ( "init_names: malloc fail.\n" ) );
226 return False;
227 }
228 }
229
230 if (!set_netbios_aliases(lp_netbios_aliases())) {
231 DEBUG( 0, ( "init_names: malloc fail.\n" ) );
232 return False;
233 }
234
235 set_local_machine_name(global_myname(),false);
236
237 DEBUG( 5, ("Netbios name list:-\n") );
238 for( n=0; my_netbios_names(n); n++ ) {
239 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
240 n, my_netbios_names(n) ) );
241 }
242
243 return( True );
244 }
245
246 /**************************************************************************n
247 Code to cope with username/password auth options from the commandline.
248 Used mainly in client tools.
249 ****************************************************************************/
250
251 struct user_auth_info *user_auth_info_init(TALLOC_CTX *mem_ctx)
252 {
253 struct user_auth_info *result;
254
255 result = TALLOC_ZERO_P(mem_ctx, struct user_auth_info);
256 if (result == NULL) {
257 return NULL;
258 }
259
260 result->signing_state = Undefined;
261 return result;
262 }
263
264 const char *get_cmdline_auth_info_username(const struct user_auth_info *auth_info)
265 {
266 if (!auth_info->username) {
267 return "";
268 }
269 return auth_info->username;
270 }
271
272 void set_cmdline_auth_info_username(struct user_auth_info *auth_info,
273 const char *username)
274 {
275 TALLOC_FREE(auth_info->username);
276 auth_info->username = talloc_strdup(auth_info, username);
277 if (!auth_info->username) {
278 exit(ENOMEM);
279 }
280 }
281
282 const char *get_cmdline_auth_info_domain(const struct user_auth_info *auth_info)
283 {
284 if (!auth_info->domain) {
285 return "";
286 }
287 return auth_info->domain;
288 }
289
290 void set_cmdline_auth_info_domain(struct user_auth_info *auth_info,
291 const char *domain)
292 {
293 TALLOC_FREE(auth_info->domain);
294 auth_info->domain = talloc_strdup(auth_info, domain);
295 if (!auth_info->domain) {
296 exit(ENOMEM);
297 }
298 }
299
300 const char *get_cmdline_auth_info_password(const struct user_auth_info *auth_info)
301 {
302 if (!auth_info->password) {
303 return "";
304 }
305 return auth_info->password;
306 }
307
308 void set_cmdline_auth_info_password(struct user_auth_info *auth_info,
309 const char *password)
310 {
311 TALLOC_FREE(auth_info->password);
312 if (password == NULL) {
313 password = "";
314 }
315 auth_info->password = talloc_strdup(auth_info, password);
316 if (!auth_info->password) {
317 exit(ENOMEM);
318 }
319 auth_info->got_pass = true;
320 }
321
322 bool set_cmdline_auth_info_signing_state(struct user_auth_info *auth_info,
323 const char *arg)
324 {
325 auth_info->signing_state = -1;
326 if (strequal(arg, "off") || strequal(arg, "no") ||
327 strequal(arg, "false")) {
328 auth_info->signing_state = false;
329 } else if (strequal(arg, "on") || strequal(arg, "yes") ||
330 strequal(arg, "true") || strequal(arg, "auto")) {
331 auth_info->signing_state = true;
332 } else if (strequal(arg, "force") || strequal(arg, "required") ||
333 strequal(arg, "forced")) {
334 auth_info->signing_state = Required;
335 } else {
336 return false;
337 }
338 return true;
339 }
340
341 int get_cmdline_auth_info_signing_state(const struct user_auth_info *auth_info)
342 {
343 return auth_info->signing_state;
344 }
345
346 void set_cmdline_auth_info_use_ccache(struct user_auth_info *auth_info, bool b)
347 {
348 auth_info->use_ccache = b;
349 }
350
351 bool get_cmdline_auth_info_use_ccache(const struct user_auth_info *auth_info)
352 {
353 return auth_info->use_ccache;
354 }
355
356 void set_cmdline_auth_info_use_kerberos(struct user_auth_info *auth_info,
357 bool b)
358 {
359 auth_info->use_kerberos = b;
360 }
361
362 bool get_cmdline_auth_info_use_kerberos(const struct user_auth_info *auth_info)
363 {
364 return auth_info->use_kerberos;
365 }
366
367 void set_cmdline_auth_info_fallback_after_kerberos(struct user_auth_info *auth_info,
368 bool b)
369 {
370 auth_info->fallback_after_kerberos = b;
371 }
372
373 bool get_cmdline_auth_info_fallback_after_kerberos(const struct user_auth_info *auth_info)
374 {
375 return auth_info->fallback_after_kerberos;
376 }
377
378 /* This should only be used by lib/popt_common.c JRA */
379 void set_cmdline_auth_info_use_krb5_ticket(struct user_auth_info *auth_info)
380 {
381 auth_info->use_kerberos = true;
382 auth_info->got_pass = true;
383 }
384
385 /* This should only be used by lib/popt_common.c JRA */
386 void set_cmdline_auth_info_smb_encrypt(struct user_auth_info *auth_info)
387 {
388 auth_info->smb_encrypt = true;
389 }
390
391 void set_cmdline_auth_info_use_machine_account(struct user_auth_info *auth_info)
392 {
393 auth_info->use_machine_account = true;
394 }
395
396 bool get_cmdline_auth_info_got_pass(const struct user_auth_info *auth_info)
397 {
398 return auth_info->got_pass;
399 }
400
401 bool get_cmdline_auth_info_smb_encrypt(const struct user_auth_info *auth_info)
402 {
403 return auth_info->smb_encrypt;
404 }
405
406 bool get_cmdline_auth_info_use_machine_account(const struct user_auth_info *auth_info)
407 {
408 return auth_info->use_machine_account;
409 }
410
411 struct user_auth_info *get_cmdline_auth_info_copy(TALLOC_CTX *mem_ctx,
412 const struct user_auth_info *src)
413 {
414 struct user_auth_info *result;
415
416 result = user_auth_info_init(mem_ctx);
417 if (result == NULL) {
418 return NULL;
419 }
420
421 *result = *src;
422
423 result->username = talloc_strdup(
424 result, get_cmdline_auth_info_username(src));
425 result->password = talloc_strdup(
426 result, get_cmdline_auth_info_password(src));
427 if ((result->username == NULL) || (result->password == NULL)) {
428 TALLOC_FREE(result);
429 return NULL;
430 }
431
432 return result;
433 }
434
435 bool set_cmdline_auth_info_machine_account_creds(struct user_auth_info *auth_info)
436 {
437 char *pass = NULL;
438 char *account = NULL;
439
440 if (!get_cmdline_auth_info_use_machine_account(auth_info)) {
441 return false;
442 }
443
444 if (!secrets_init()) {
445 d_printf("ERROR: Unable to open secrets database\n");
446 return false;
447 }
448
449 if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
450 return false;
451 }
452
453 pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
454 if (!pass) {
455 d_printf("ERROR: Unable to fetch machine password for "
456 "%s in domain %s\n",
457 account, lp_workgroup());
458 SAFE_FREE(account);
459 return false;
460 }
461
462 set_cmdline_auth_info_username(auth_info, account);
463 set_cmdline_auth_info_password(auth_info, pass);
464
465 SAFE_FREE(account);
466 SAFE_FREE(pass);
467
468 return true;
469 }
470
471 /****************************************************************************
472 Ensure we have a password if one not given.
473 ****************************************************************************/
474
475 void set_cmdline_auth_info_getpass(struct user_auth_info *auth_info)
476 {
477 char *label = NULL;
478 char *pass;
479 TALLOC_CTX *frame;
480
481 if (get_cmdline_auth_info_got_pass(auth_info) ||
482 get_cmdline_auth_info_use_kerberos(auth_info)) {
483 /* Already got one... */
484 return;
485 }
486
487 frame = talloc_stackframe();
488 label = talloc_asprintf(frame, "Enter %s's password: ",
489 get_cmdline_auth_info_username(auth_info));
490 pass = getpass(label);
491 if (pass) {
492 set_cmdline_auth_info_password(auth_info, pass);
493 }
494 TALLOC_FREE(frame);
495 }
496
497 /*******************************************************************
498 Check if a file exists - call vfs_file_exist for samba files.
499 ********************************************************************/
500
501 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf,
502 bool fake_dir_create_times)
503 {
504 SMB_STRUCT_STAT st;
505 if (!sbuf)
506 sbuf = &st;
507
508 if (sys_stat(fname, sbuf, fake_dir_create_times) != 0)
509 return(False);
510
511 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
512 }
513
514 /*******************************************************************
515 Check if a unix domain socket exists - call vfs_file_exist for samba files.
516 ********************************************************************/
517
518 bool socket_exist(const char *fname)
519 {
520 SMB_STRUCT_STAT st;
521 if (sys_stat(fname, &st, false) != 0)
522 return(False);
523
524 return S_ISSOCK(st.st_ex_mode);
525 }
526
527 /*******************************************************************
528 Returns the size in bytes of the named given the stat struct.
529 ********************************************************************/
530
531 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
532 {
533 return sbuf->st_ex_size;
534 }
535
536 /*******************************************************************
537 Returns the size in bytes of the named file.
538 ********************************************************************/
539
540 SMB_OFF_T get_file_size(char *file_name)
541 {
542 SMB_STRUCT_STAT buf;
543 buf.st_ex_size = 0;
544 if (sys_stat(file_name, &buf, false) != 0)
545 return (SMB_OFF_T)-1;
546 return get_file_size_stat(&buf);
547 }
548
549 /*******************************************************************
550 Return a string representing an attribute for a file.
551 ********************************************************************/
552
553 char *attrib_string(uint16 mode)
554 {
555 fstring attrstr;
556
557 attrstr[0] = 0;
558
559 if (mode & aVOLID) fstrcat(attrstr,"V");
560 if (mode & aDIR) fstrcat(attrstr,"D");
561 if (mode & aARCH) fstrcat(attrstr,"A");
562 if (mode & aHIDDEN) fstrcat(attrstr,"H");
563 if (mode & aSYSTEM) fstrcat(attrstr,"S");
564 if (mode & aRONLY) fstrcat(attrstr,"R");
565
566 return talloc_strdup(talloc_tos(), attrstr);
567 }
568
569 /*******************************************************************
570 Show a smb message structure.
571 ********************************************************************/
572
573 void show_msg(char *buf)
574 {
575 int i;
576 int bcc=0;
577
578 if (!DEBUGLVL(5))
579 return;
580
581 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
582 smb_len(buf),
583 (int)CVAL(buf,smb_com),
584 (int)CVAL(buf,smb_rcls),
585 (int)CVAL(buf,smb_reh),
586 (int)SVAL(buf,smb_err),
587 (int)CVAL(buf,smb_flg),
588 (int)SVAL(buf,smb_flg2)));
589 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
590 (int)SVAL(buf,smb_tid),
591 (int)SVAL(buf,smb_pid),
592 (int)SVAL(buf,smb_uid),
593 (int)SVAL(buf,smb_mid)));
594 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
595
596 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
597 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
598 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
599
600 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
601
602 DEBUGADD(5,("smb_bcc=%d\n",bcc));
603
604 if (DEBUGLEVEL < 10)
605 return;
606
607 if (DEBUGLEVEL < 50)
608 bcc = MIN(bcc, 512);
609
610 dump_data(10, (uint8 *)smb_buf(buf), bcc);
611 }
612
613 /*******************************************************************
614 Set the length and marker of an encrypted smb packet.
615 ********************************************************************/
616
617 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
618 {
619 _smb_setlen(buf,len);
620
621 SCVAL(buf,4,0xFF);
622 SCVAL(buf,5,'E');
623 SSVAL(buf,6,enc_ctx_num);
624 }
625
626 /*******************************************************************
627 Set the length and marker of an smb packet.
628 ********************************************************************/
629
630 void smb_setlen(char *buf,int len)
631 {
632 _smb_setlen(buf,len);
633
634 SCVAL(buf,4,0xFF);
635 SCVAL(buf,5,'S');
636 SCVAL(buf,6,'M');
637 SCVAL(buf,7,'B');
638 }
639
640 /*******************************************************************
641 Setup only the byte count for a smb message.
642 ********************************************************************/
643
644 int set_message_bcc(char *buf,int num_bytes)
645 {
646 int num_words = CVAL(buf,smb_wct);
647 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
648 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
649 return (smb_size + num_words*2 + num_bytes);
650 }
651
652 /*******************************************************************
653 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
654 Return the bytes added
655 ********************************************************************/
656
657 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
658 {
659 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
660 uint8 *tmp;
661
662 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
663 DEBUG(0, ("talloc failed\n"));
664 return -1;
665 }
666 *outbuf = tmp;
667
668 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
669 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
670 return blob.length;
671 }
672
673 /*******************************************************************
674 Reduce a file name, removing .. elements.
675 ********************************************************************/
676
677 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
678 {
679 char *p = NULL;
680 char *str = NULL;
681
682 DEBUG(3,("dos_clean_name [%s]\n",s));
683
684 /* remove any double slashes */
685 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
686 if (!str) {
687 return NULL;
688 }
689
690 /* Remove leading .\\ characters */
691 if(strncmp(str, ".\\", 2) == 0) {
692 trim_string(str, ".\\", NULL);
693 if(*str == 0) {
694 str = talloc_strdup(ctx, ".\\");
695 if (!str) {
696 return NULL;
697 }
698 }
699 }
700
701 while ((p = strstr_m(str,"\\..\\")) != NULL) {
702 char *s1;
703
704 *p = 0;
705 s1 = p+3;
706
707 if ((p=strrchr_m(str,'\\')) != NULL) {
708 *p = 0;
709 } else {
710 *str = 0;
711 }
712 str = talloc_asprintf(ctx,
713 "%s%s",
714 str,
715 s1);
716 if (!str) {
717 return NULL;
718 }
719 }
720
721 trim_string(str,NULL,"\\..");
722 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
723 }
724
725 /*******************************************************************
726 Reduce a file name, removing .. elements.
727 ********************************************************************/
728
729 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
730 {
731 char *p = NULL;
732 char *str = NULL;
733
734 DEBUG(3,("unix_clean_name [%s]\n",s));
735
736 /* remove any double slashes */
737 str = talloc_all_string_sub(ctx, s, "//","/");
738 if (!str) {
739 return NULL;
740 }
741
742 /* Remove leading ./ characters */
743 if(strncmp(str, "./", 2) == 0) {
744 trim_string(str, "./", NULL);
745 if(*str == 0) {
746 str = talloc_strdup(ctx, "./");
747 if (!str) {
748 return NULL;
749 }
750 }
751 }
752
753 while ((p = strstr_m(str,"/../")) != NULL) {
754 char *s1;
755
756 *p = 0;
757 s1 = p+3;
758
759 if ((p=strrchr_m(str,'/')) != NULL) {
760 *p = 0;
761 } else {
762 *str = 0;
763 }
764 str = talloc_asprintf(ctx,
765 "%s%s",
766 str,
767 s1);
768 if (!str) {
769 return NULL;
770 }
771 }
772
773 trim_string(str,NULL,"/..");
774 return talloc_all_string_sub(ctx, str, "/./", "/");
775 }
776
777 char *clean_name(TALLOC_CTX *ctx, const char *s)
778 {
779 char *str = dos_clean_name(ctx, s);
780 if (!str) {
781 return NULL;
782 }
783 return unix_clean_name(ctx, str);
784 }
785
786 /*******************************************************************
787 Write data into an fd at a given offset. Ignore seek errors.
788 ********************************************************************/
789
790 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
791 {
792 size_t total=0;
793 ssize_t ret;
794
795 if (pos == (SMB_OFF_T)-1) {
796 return write_data(fd, buffer, N);
797 }
798 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
799 while (total < N) {
800 ret = sys_pwrite(fd,buffer + total,N - total, pos);
801 if (ret == -1 && errno == ESPIPE) {
802 return write_data(fd, buffer + total,N - total);
803 }
804 if (ret == -1) {
805 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
806 return -1;
807 }
808 if (ret == 0) {
809 return total;
810 }
811 total += ret;
812 pos += ret;
813 }
814 return (ssize_t)total;
815 #else
816 /* Use lseek and write_data. */
817 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
818 if (errno != ESPIPE) {
819 return -1;
820 }
821 }
822 return write_data(fd, buffer, N);
823 #endif
824 }
825
826 /*******************************************************************
827 Sleep for a specified number of milliseconds.
828 ********************************************************************/
829
830 void smb_msleep(unsigned int t)
831 {
832 #if defined(HAVE_NANOSLEEP)
833 struct timespec tval;
834 int ret;
835
836 tval.tv_sec = t/1000;
837 tval.tv_nsec = 1000000*(t%1000);
838
839 do {
840 errno = 0;
841 ret = nanosleep(&tval, &tval);
842 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
843 #else
844 unsigned int tdiff=0;
845 struct timeval tval,t1,t2;
846 fd_set fds;
847
848 GetTimeOfDay(&t1);
849 t2 = t1;
850
851 while (tdiff < t) {
852 tval.tv_sec = (t-tdiff)/1000;
853 tval.tv_usec = 1000*((t-tdiff)%1000);
854
855 /* Never wait for more than 1 sec. */
856 if (tval.tv_sec > 1) {
857 tval.tv_sec = 1;
858 tval.tv_usec = 0;
859 }
860
861 FD_ZERO(&fds);
862 errno = 0;
863 sys_select_intr(0,&fds,NULL,NULL,&tval);
864
865 GetTimeOfDay(&t2);
866 if (t2.tv_sec < t1.tv_sec) {
867 /* Someone adjusted time... */
868 t1 = t2;
869 }
870
871 tdiff = TvalDiff(&t1,&t2);
872 }
873 #endif
874 }
875
876 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
877 struct event_context *ev_ctx,
878 struct server_id id,
879 bool parent_longlived)
880 {
881 NTSTATUS status = NT_STATUS_OK;
882
883 /* Reset the state of the random
884 * number generation system, so
885 * children do not get the same random
886 * numbers as each other */
887 set_need_random_reseed();
888
889 /* tdb needs special fork handling */
890 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
891 DEBUG(0,("tdb_reopen_all failed.\n"));
892 status = NT_STATUS_OPEN_FAILED;
893 goto done;
894 }
895
896 if (ev_ctx && tevent_re_initialise(ev_ctx) != 0) {
897 smb_panic(__location__ ": Failed to re-initialise event context");
898 }
899
900 if (msg_ctx) {
901 /*
902 * For clustering, we need to re-init our ctdbd connection after the
903 * fork
904 */
905 status = messaging_reinit(msg_ctx, id);
906 if (!NT_STATUS_IS_OK(status)) {
907 DEBUG(0,("messaging_reinit() failed: %s\n",
908 nt_errstr(status)));
909 }
910 }
911 done:
912 return status;
913 }
914
915 #if defined(PARANOID_MALLOC_CHECKER)
916
917 /****************************************************************************
918 Internal malloc wrapper. Externally visible.
919 ****************************************************************************/
920
921 void *malloc_(size_t size)
922 {
923 if (size == 0) {
924 return NULL;
925 }
926 #undef malloc
927 return malloc(size);
928 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
929 }
930
931 /****************************************************************************
932 Internal calloc wrapper. Not externally visible.
933 ****************************************************************************/
934
935 static void *calloc_(size_t count, size_t size)
936 {
937 if (size == 0 || count == 0) {
938 return NULL;
939 }
940 #undef calloc
941 return calloc(count, size);
942 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
943 }
944
945 /****************************************************************************
946 Internal realloc wrapper. Not externally visible.
947 ****************************************************************************/
948
949 static void *realloc_(void *ptr, size_t size)
950 {
951 #undef realloc
952 return realloc(ptr, size);
953 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
954 }
955
956 #endif /* PARANOID_MALLOC_CHECKER */
957
958 /****************************************************************************
959 Type-safe memalign
960 ****************************************************************************/
961
962 void *memalign_array(size_t el_size, size_t align, unsigned int count)
963 {
964 if (count >= MAX_ALLOC_SIZE/el_size) {
965 return NULL;
966 }
967
968 return sys_memalign(align, el_size*count);
969 }
970
971 /****************************************************************************
972 Type-safe calloc.
973 ****************************************************************************/
974
975 void *calloc_array(size_t size, size_t nmemb)
976 {
977 if (nmemb >= MAX_ALLOC_SIZE/size) {
978 return NULL;
979 }
980 if (size == 0 || nmemb == 0) {
981 return NULL;
982 }
983 #if defined(PARANOID_MALLOC_CHECKER)
984 return calloc_(nmemb, size);
985 #else
986 return calloc(nmemb, size);
987 #endif
988 }
989
990 /****************************************************************************
991 Expand a pointer to be a particular size.
992 Note that this version of Realloc has an extra parameter that decides
993 whether to free the passed in storage on allocation failure or if the
994 new size is zero.
995
996 This is designed for use in the typical idiom of :
997
998 p = SMB_REALLOC(p, size)
999 if (!p) {
1000 return error;
1001 }
1002
1003 and not to have to keep track of the old 'p' contents to free later, nor
1004 to worry if the size parameter was zero. In the case where NULL is returned
1005 we guarentee that p has been freed.
1006
1007 If free later semantics are desired, then pass 'free_old_on_error' as False which
1008 guarentees that the old contents are not freed on error, even if size == 0. To use
1009 this idiom use :
1010
1011 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1012 if (!tmp) {
1013 SAFE_FREE(p);
1014 return error;
1015 } else {
1016 p = tmp;
1017 }
1018
1019 Changes were instigated by Coverity error checking. JRA.
1020 ****************************************************************************/
1021
1022 void *Realloc(void *p, size_t size, bool free_old_on_error)
1023 {
1024 void *ret=NULL;
1025
1026 if (size == 0) {
1027 if (free_old_on_error) {
1028 SAFE_FREE(p);
1029 }
1030 DEBUG(2,("Realloc asked for 0 bytes\n"));
1031 return NULL;
1032 }
1033
1034 #if defined(PARANOID_MALLOC_CHECKER)
1035 if (!p) {
1036 ret = (void *)malloc_(size);
1037 } else {
1038 ret = (void *)realloc_(p,size);
1039 }
1040 #else
1041 if (!p) {
1042 ret = (void *)malloc(size);
1043 } else {
1044 ret = (void *)realloc(p,size);
1045 }
1046 #endif
1047
1048 if (!ret) {
1049 if (free_old_on_error && p) {
1050 SAFE_FREE(p);
1051 }
1052 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1053 }
1054
1055 return(ret);
1056 }
1057
1058 /****************************************************************************
1059 (Hopefully) efficient array append.
1060 ****************************************************************************/
1061
1062 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1063 void *element, void *_array, uint32 *num_elements,
1064 ssize_t *array_size)
1065 {
1066 void **array = (void **)_array;
1067
1068 if (*array_size < 0) {
1069 return;
1070 }
1071
1072 if (*array == NULL) {
1073 if (*array_size == 0) {
1074 *array_size = 128;
1075 }
1076
1077 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1078 goto error;
1079 }
1080
1081 *array = TALLOC(mem_ctx, element_size * (*array_size));
1082 if (*array == NULL) {
1083 goto error;
1084 }
1085 }
1086
1087 if (*num_elements == *array_size) {
1088 *array_size *= 2;
1089
1090 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1091 goto error;
1092 }
1093
1094 *array = TALLOC_REALLOC(mem_ctx, *array,
1095 element_size * (*array_size));
1096
1097 if (*array == NULL) {
1098 goto error;
1099 }
1100 }
1101
1102 memcpy((char *)(*array) + element_size*(*num_elements),
1103 element, element_size);
1104 *num_elements += 1;
1105
1106 return;
1107
1108 error:
1109 *num_elements = 0;
1110 *array_size = -1;
1111 }
1112
1113 /****************************************************************************
1114 Get my own domain name, or "" if we have none.
1115 ****************************************************************************/
1116
1117 char *get_mydnsdomname(TALLOC_CTX *ctx)
1118 {
1119 const char *domname;
1120 char *p;
1121
1122 domname = get_mydnsfullname();
1123 if (!domname) {
1124 return NULL;
1125 }
1126
1127 p = strchr_m(domname, '.');
1128 if (p) {
1129 p++;
1130 return talloc_strdup(ctx, p);
1131 } else {
1132 return talloc_strdup(ctx, "");
1133 }
1134 }
1135
1136 /****************************************************************************
1137 Interpret a protocol description string, with a default.
1138 ****************************************************************************/
1139
1140 int interpret_protocol(const char *str,int def)
1141 {
1142 if (strequal(str,"NT1"))
1143 return(PROTOCOL_NT1);
1144 if (strequal(str,"LANMAN2"))
1145 return(PROTOCOL_LANMAN2);
1146 if (strequal(str,"LANMAN1"))
1147 return(PROTOCOL_LANMAN1);
1148 if (strequal(str,"CORE"))
1149 return(PROTOCOL_CORE);
1150 if (strequal(str,"COREPLUS"))
1151 return(PROTOCOL_COREPLUS);
1152 if (strequal(str,"CORE+"))
1153 return(PROTOCOL_COREPLUS);
1154
1155 DEBUG(0,("Unrecognised protocol level %s\n",str));
1156
1157 return(def);
1158 }
1159
1160
1161 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1162 /******************************************************************
1163 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1164 Based on a fix from <Thomas.Hepper@icem.de>.
1165 Returns a malloc'ed string.
1166 *******************************************************************/
1167
1168 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1169 {
1170 if (*str == '-') {
1171 const char *p = str;
1172 while(*p && !isspace(*p))
1173 p++;
1174 while(*p && isspace(*p))
1175 p++;
1176 if(*p) {
1177 return talloc_strdup(ctx, p);
1178 }
1179 }
1180 return NULL;
1181 }
1182
1183 /*******************************************************************
1184 Patch from jkf@soton.ac.uk
1185 Split Luke's automount_server into YP lookup and string splitter
1186 so can easily implement automount_path().
1187 Returns a malloc'ed string.
1188 *******************************************************************/
1189
1190 #ifdef WITH_NISPLUS_HOME
1191 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1192 {
1193 char *value = NULL;
1194
1195 char *nis_map = (char *)lp_nis_home_map_name();
1196
1197 char buffer[NIS_MAXATTRVAL + 1];
1198 nis_result *result;
1199 nis_object *object;
1200 entry_obj *entry;
1201
1202 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1203 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1204
1205 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1206 if (result->status != NIS_SUCCESS) {
1207 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1208 } else {
1209 object = result->objects.objects_val;
1210 if (object->zo_data.zo_type == ENTRY_OBJ) {
1211 entry = &object->zo_data.objdata_u.en_data;
1212 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1213 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1214
1215 value = talloc_strdup(ctx,
1216 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1217 if (!value) {
1218 nis_freeresult(result);
1219 return NULL;
1220 }
1221 value = talloc_string_sub(ctx,
1222 value,
1223 "&",
1224 user_name);
1225 }
1226 }
1227 }
1228 nis_freeresult(result);
1229
1230 if (value) {
1231 value = strip_mount_options(ctx, value);
1232 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1233 user_name, value));
1234 }
1235 return value;
1236 }
1237 #else /* WITH_NISPLUS_HOME */
1238
1239 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1240 {
1241 char *value = NULL;
1242
1243 int nis_error; /* returned by yp all functions */
1244 char *nis_result; /* yp_match inits this */
1245 int nis_result_len; /* and set this */
1246 char *nis_domain; /* yp_get_default_domain inits this */
1247 char *nis_map = (char *)lp_nis_home_map_name();
1248
1249 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1250 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1251 return NULL;
1252 }
1253
1254 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1255
1256 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1257 strlen(user_name), &nis_result,
1258 &nis_result_len)) == 0) {
1259 if (nis_result_len > 0 && nis_result[nis_result_len] == '\n') {
1260 nis_result[nis_result_len] = '\0';
1261 }
1262 value = talloc_strdup(ctx, nis_result);
1263 if (!value) {
1264 return NULL;
1265 }
1266 value = strip_mount_options(ctx, value);
1267 } else if(nis_error == YPERR_KEY) {
1268 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1269 user_name, nis_map));
1270 DEBUG(3, ("using defaults for server and home directory\n"));
1271 } else {
1272 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1273 yperr_string(nis_error), user_name, nis_map));
1274 }
1275
1276 if (value) {
1277 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1278 }
1279 return value;
1280 }
1281 #endif /* WITH_NISPLUS_HOME */
1282 #endif
1283
1284 /****************************************************************************
1285 Check if a process exists. Does this work on all unixes?
1286 ****************************************************************************/
1287
1288 bool process_exists(const struct server_id pid)
1289 {
1290 if (procid_is_me(&pid)) {
1291 return True;
1292 }
1293
1294 if (procid_is_local(&pid)) {
1295 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1296 }
1297
1298 #ifdef CLUSTER_SUPPORT
1299 return ctdbd_process_exists(messaging_ctdbd_connection(),
1300 pid.vnn, pid.pid);
1301 #else
1302 return False;
1303 #endif
1304 }
1305
1306 /*******************************************************************
1307 Convert a uid into a user name.
1308 ********************************************************************/
1309
1310 const char *uidtoname(uid_t uid)
1311 {
1312 TALLOC_CTX *ctx = talloc_tos();
1313 char *name = NULL;
1314 struct passwd *pass = NULL;
1315
1316 pass = getpwuid_alloc(ctx,uid);
1317 if (pass) {
1318 name = talloc_strdup(ctx,pass->pw_name);
1319 TALLOC_FREE(pass);
1320 } else {
1321 name = talloc_asprintf(ctx,
1322 "%ld",
1323 (long int)uid);
1324 }
1325 return name;
1326 }
1327
1328 /*******************************************************************
1329 Convert a gid into a group name.
1330 ********************************************************************/
1331
1332 char *gidtoname(gid_t gid)
1333 {
1334 struct group *grp;
1335
1336 grp = getgrgid(gid);
1337 if (grp) {
1338 return talloc_strdup(talloc_tos(), grp->gr_name);
1339 }
1340 else {
1341 return talloc_asprintf(talloc_tos(),
1342 "%d",
1343 (int)gid);
1344 }
1345 }
1346
1347 /*******************************************************************
1348 Convert a user name into a uid.
1349 ********************************************************************/
1350
1351 uid_t nametouid(const char *name)
1352 {
1353 struct passwd *pass;
1354 char *p;
1355 uid_t u;
1356
1357 pass = getpwnam_alloc(talloc_autofree_context(), name);
1358 if (pass) {
1359 u = pass->pw_uid;
1360 TALLOC_FREE(pass);
1361 return u;
1362 }
1363
1364 u = (uid_t)strtol(name, &p, 0);
1365 if ((p != name) && (*p == '\0'))
1366 return u;
1367
1368 return (uid_t)-1;
1369 }
1370
1371 /*******************************************************************
1372 Convert a name to a gid_t if possible. Return -1 if not a group.
1373 ********************************************************************/
1374
1375 gid_t nametogid(const char *name)
1376 {
1377 struct group *grp;
1378 char *p;
1379 gid_t g;
1380
1381 g = (gid_t)strtol(name, &p, 0);
1382 if ((p != name) && (*p == '\0'))
1383 return g;
1384
1385 grp = sys_getgrnam(name);
1386 if (grp)
1387 return(grp->gr_gid);
1388 return (gid_t)-1;
1389 }
1390
1391 /*******************************************************************
1392 Something really nasty happened - panic !
1393 ********************************************************************/
1394
1395 void smb_panic(const char *const why)
1396 {
1397 char *cmd;
1398 int result;
1399
1400 #ifdef DEVELOPER
1401 {
1402
1403 if (global_clobber_region_function) {
1404 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1405 global_clobber_region_function,
1406 global_clobber_region_line));
1407 }
1408 }
1409 #endif
1410
1411 DEBUG(0,("PANIC (pid %llu): %s\n",
1412 (unsigned long long)sys_getpid(), why));
1413 log_stack_trace();
1414
1415 cmd = lp_panic_action();
1416 if (cmd && *cmd) {
1417 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1418 result = system(cmd);
1419
1420 if (result == -1)
1421 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1422 strerror(errno)));
1423 else
1424 DEBUG(0, ("smb_panic(): action returned status %d\n",
1425 WEXITSTATUS(result)));
1426 }
1427
1428 dump_core();
1429 }
1430
1431 /*******************************************************************
1432 Print a backtrace of the stack to the debug log. This function
1433 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1434 exit shortly after calling it.
1435 ********************************************************************/
1436
1437 #ifdef HAVE_LIBUNWIND_H
1438 #include <libunwind.h>
1439 #endif
1440
1441 #ifdef HAVE_EXECINFO_H
1442 #include <execinfo.h>
1443 #endif
1444
1445 #ifdef HAVE_LIBEXC_H
1446 #include <libexc.h>
1447 #endif
1448
1449 void log_stack_trace(void)
1450 {
1451 #ifdef HAVE_LIBUNWIND
1452 /* Try to use libunwind before any other technique since on ia64
1453 * libunwind correctly walks the stack in more circumstances than
1454 * backtrace.
1455 */
1456 unw_cursor_t cursor;
1457 unw_context_t uc;
1458 unsigned i = 0;
1459
1460 char procname[256];
1461 unw_word_t ip, sp, off;
1462
1463 procname[sizeof(procname) - 1] = '\0';
1464
1465 if (unw_getcontext(&uc) != 0) {
1466 goto libunwind_failed;
1467 }
1468
1469 if (unw_init_local(&cursor, &uc) != 0) {
1470 goto libunwind_failed;
1471 }
1472
1473 DEBUG(0, ("BACKTRACE:\n"));
1474
1475 do {
1476 ip = sp = 0;
1477 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1478 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1479
1480 switch (unw_get_proc_name(&cursor,
1481 procname, sizeof(procname) - 1, &off) ) {
1482 case 0:
1483 /* Name found. */
1484 case -UNW_ENOMEM:
1485 /* Name truncated. */
1486 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1487 i, procname, (long long)off,
1488 (long long)ip, (long long) sp));
1489 break;
1490 default:
1491 /* case -UNW_ENOINFO: */
1492 /* case -UNW_EUNSPEC: */
1493 /* No symbol name found. */
1494 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1495 i, "<unknown symbol>",
1496 (long long)ip, (long long) sp));
1497 }
1498 ++i;
1499 } while (unw_step(&cursor) > 0);
1500
1501 return;
1502
1503 libunwind_failed:
1504 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1505
1506 #elif HAVE_BACKTRACE_SYMBOLS
1507 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1508 size_t backtrace_size;
1509 char **backtrace_strings;
1510
1511 /* get the backtrace (stack frames) */
1512 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1513 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1514
1515 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1516 (unsigned long)backtrace_size));
1517
1518 if (backtrace_strings) {
1519 int i;
1520
1521 for (i = 0; i < backtrace_size; i++)
1522 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1523
1524 /* Leak the backtrace_strings, rather than risk what free() might do */
1525 }
1526
1527 #elif HAVE_LIBEXC
1528
1529 /* The IRIX libexc library provides an API for unwinding the stack. See
1530 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1531 * since we are about to abort anyway, it hardly matters.
1532 */
1533
1534 #define NAMESIZE 32 /* Arbitrary */
1535
1536 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1537 char * names[BACKTRACE_STACK_SIZE];
1538 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1539
1540 int i;
1541 int levels;
1542
1543 ZERO_ARRAY(addrs);
1544 ZERO_ARRAY(names);
1545 ZERO_ARRAY(namebuf);
1546
1547 /* We need to be root so we can open our /proc entry to walk
1548 * our stack. It also helps when we want to dump core.
1549 */
1550 become_root();
1551
1552 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1553 names[i] = namebuf + (i * NAMESIZE);
1554 }
1555
1556 levels = trace_back_stack(0, addrs, names,
1557 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1558
1559 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1560 for (i = 0; i < levels; i++) {
1561 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1562 }
1563 #undef NAMESIZE
1564
1565 #else
1566 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1567 #endif
1568 }
1569
1570 /*******************************************************************
1571 A readdir wrapper which just returns the file name.
1572 ********************************************************************/
1573
1574 const char *readdirname(SMB_STRUCT_DIR *p)
1575 {
1576 SMB_STRUCT_DIRENT *ptr;
1577 char *dname;
1578
1579 if (!p)
1580 return(NULL);
1581
1582 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1583 if (!ptr)
1584 return(NULL);
1585
1586 dname = ptr->d_name;
1587
1588 #ifdef NEXT2
1589 if (telldir(p) < 0)
1590 return(NULL);
1591 #endif
1592
1593 #ifdef HAVE_BROKEN_READDIR_NAME
1594 /* using /usr/ucb/cc is BAD */
1595 dname = dname - 2;
1596 #endif
1597
1598 return talloc_strdup(talloc_tos(), dname);
1599 }
1600
1601 /*******************************************************************
1602 Utility function used to decide if the last component
1603 of a path matches a (possibly wildcarded) entry in a namelist.
1604 ********************************************************************/
1605
1606 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1607 {
1608 const char *last_component;
1609
1610 /* if we have no list it's obviously not in the path */
1611 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1612 return False;
1613 }
1614
1615 DEBUG(8, ("is_in_path: %s\n", name));
1616
1617 /* Get the last component of the unix name. */
1618 last_component = strrchr_m(name, '/');
1619 if (!last_component) {
1620 last_component = name;
1621 } else {
1622 last_component++; /* Go past '/' */
1623 }
1624
1625 for(; namelist->name != NULL; namelist++) {
1626 if(namelist->is_wild) {
1627 if (mask_match(last_component, namelist->name, case_sensitive)) {
1628 DEBUG(8,("is_in_path: mask match succeeded\n"));
1629 return True;
1630 }
1631 } else {
1632 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1633 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1634 DEBUG(8,("is_in_path: match succeeded\n"));
1635 return True;
1636 }
1637 }
1638 }
1639 DEBUG(8,("is_in_path: match not found\n"));
1640 return False;
1641 }
1642
1643 /*******************************************************************
1644 Strip a '/' separated list into an array of
1645 name_compare_enties structures suitable for
1646 passing to is_in_path(). We do this for
1647 speed so we can pre-parse all the names in the list
1648 and don't do it for each call to is_in_path().
1649 namelist is modified here and is assumed to be
1650 a copy owned by the caller.
1651 We also check if the entry contains a wildcard to
1652 remove a potentially expensive call to mask_match
1653 if possible.
1654 ********************************************************************/
1655
1656 void set_namearray(name_compare_entry **ppname_array, const char *namelist)
1657 {
1658 char *name_end;
1659 char *nameptr = (char *)namelist;
1660 int num_entries = 0;
1661 int i;
1662
1663 (*ppname_array) = NULL;
1664
1665 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1666 return;
1667
1668 /* We need to make two passes over the string. The
1669 first to count the number of elements, the second
1670 to split it.
1671 */
1672
1673 while(*nameptr) {
1674 if ( *nameptr == '/' ) {
1675 /* cope with multiple (useless) /s) */
1676 nameptr++;
1677 continue;
1678 }
1679 /* anything left? */
1680 if ( *nameptr == '\0' )
1681 break;
1682
1683 /* find the next '/' or consume remaining */
1684 name_end = strchr_m(nameptr, '/');
1685 if (name_end == NULL)
1686 name_end = (char *)nameptr + strlen(nameptr);
1687
1688 /* next segment please */
1689 nameptr = name_end + 1;
1690 num_entries++;
1691 }
1692
1693 if(num_entries == 0)
1694 return;
1695
1696 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1697 DEBUG(0,("set_namearray: malloc fail\n"));
1698 return;
1699 }
1700
1701 /* Now copy out the names */
1702 nameptr = (char *)namelist;
1703 i = 0;
1704 while(*nameptr) {
1705 if ( *nameptr == '/' ) {
1706 /* cope with multiple (useless) /s) */
1707 nameptr++;
1708 continue;
1709 }
1710 /* anything left? */
1711 if ( *nameptr == '\0' )
1712 break;
1713
1714 /* find the next '/' or consume remaining */
1715 name_end = strchr_m(nameptr, '/');
1716 if (name_end)
1717 *name_end = '\0';
1718 else
1719 name_end = nameptr + strlen(nameptr);
1720
1721 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1722 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1723 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1724 return;
1725 }
1726
1727 /* next segment please */
1728 nameptr = name_end + 1;
1729 i++;
1730 }
1731
1732 (*ppname_array)[i].name = NULL;
1733
1734 return;
1735 }
1736
1737 /****************************************************************************
1738 Routine to free a namearray.
1739 ****************************************************************************/
1740
1741 void free_namearray(name_compare_entry *name_array)
1742 {
1743 int i;
1744
1745 if(name_array == NULL)
1746 return;
1747
1748 for(i=0; name_array[i].name!=NULL; i++)
1749 SAFE_FREE(name_array[i].name);
1750 SAFE_FREE(name_array);
1751 }
1752
1753 #undef DBGC_CLASS
1754 #define DBGC_CLASS DBGC_LOCKING
1755
1756 /****************************************************************************
1757 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1758 is dealt with in posix.c
1759 Returns True if we have information regarding this lock region (and returns
1760 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1761 ****************************************************************************/
1762
1763 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
1764 {
1765 SMB_STRUCT_FLOCK lock;
1766 int ret;
1767
1768 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1769 fd,(double)*poffset,(double)*pcount,*ptype));
1770
1771 lock.l_type = *ptype;
1772 lock.l_whence = SEEK_SET;
1773 lock.l_start = *poffset;
1774 lock.l_len = *pcount;
1775 lock.l_pid = 0;
1776
1777 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
1778
1779 if (ret == -1) {
1780 int sav = errno;
1781 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1782 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1783 errno = sav;
1784 return False;
1785 }
1786
1787 *ptype = lock.l_type;
1788 *poffset = lock.l_start;
1789 *pcount = lock.l_len;
1790 *ppid = lock.l_pid;
1791
1792 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1793 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1794 return True;
1795 }
1796
1797 #undef DBGC_CLASS
1798 #define DBGC_CLASS DBGC_ALL
1799
1800 /*******************************************************************
1801 Is the name specified one of my netbios names.
1802 Returns true if it is equal, false otherwise.
1803 ********************************************************************/
1804
1805 bool is_myname(const char *s)
1806 {
1807 int n;
1808 bool ret = False;
1809
1810 for (n=0; my_netbios_names(n); n++) {
1811 if (strequal(my_netbios_names(n), s)) {
1812 ret=True;
1813 break;
1814 }
1815 }
1816 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1817 return(ret);
1818 }
1819
1820 /*******************************************************************
1821 Is the name specified our workgroup/domain.
1822 Returns true if it is equal, false otherwise.
1823 ********************************************************************/
1824
1825 bool is_myworkgroup(const char *s)
1826 {
1827 bool ret = False;
1828
1829 if (strequal(s, lp_workgroup())) {
1830 ret=True;
1831 }
1832
1833 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1834 return(ret);
1835 }
1836
1837 /*******************************************************************
1838 we distinguish between 2K and XP by the "Native Lan Manager" string
1839 WinXP => "Windows 2002 5.1"
1840 WinXP 64bit => "Windows XP 5.2"
1841 Win2k => "Windows 2000 5.0"
1842 NT4 => "Windows NT 4.0"
1843 Win9x => "Windows 4.0"
1844 Windows 2003 doesn't set the native lan manager string but
1845 they do set the domain to "Windows 2003 5.2" (probably a bug).
1846 ********************************************************************/
1847
1848 void ra_lanman_string( const char *native_lanman )
1849 {
1850 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1851 set_remote_arch( RA_WINXP );
1852 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1853 set_remote_arch( RA_WINXP64 );
1854 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1855 set_remote_arch( RA_WIN2K3 );
1856 }
1857
1858 static const char *remote_arch_str;
1859
1860 const char *get_remote_arch_str(void)
1861 {
1862 if (!remote_arch_str) {
1863 return "UNKNOWN";
1864 }
1865 return remote_arch_str;
1866 }
1867
1868 /*******************************************************************
1869 Set the horrid remote_arch string based on an enum.
1870 ********************************************************************/
1871
1872 void set_remote_arch(enum remote_arch_types type)
1873 {
1874 ra_type = type;
1875 switch( type ) {
1876 case RA_WFWG:
1877 remote_arch_str = "WfWg";
1878 break;
1879 case RA_OS2:
1880 remote_arch_str = "OS2";
1881 break;
1882 case RA_WIN95:
1883 remote_arch_str = "Win95";
1884 break;
1885 case RA_WINNT:
1886 remote_arch_str = "WinNT";
1887 break;
1888 case RA_WIN2K:
1889 remote_arch_str = "Win2K";
1890 break;
1891 case RA_WINXP:
1892 remote_arch_str = "WinXP";
1893 break;
1894 case RA_WINXP64:
1895 remote_arch_str = "WinXP64";
1896 break;
1897 case RA_WIN2K3:
1898 remote_arch_str = "Win2K3";
1899 break;
1900 case RA_VISTA:
1901 remote_arch_str = "Vista";
1902 break;
1903 case RA_SAMBA:
1904 remote_arch_str = "Samba";
1905 break;
1906 case RA_CIFSFS:
1907 remote_arch_str = "CIFSFS";
1908 break;
1909 default:
1910 ra_type = RA_UNKNOWN;
1911 remote_arch_str = "UNKNOWN";
1912 break;
1913 }
1914
1915 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1916 remote_arch_str));
1917 }
1918
1919 /*******************************************************************
1920 Get the remote_arch type.
1921 ********************************************************************/
1922
1923 enum remote_arch_types get_remote_arch(void)
1924 {
1925 return ra_type;
1926 }
1927
1928 const char *tab_depth(int level, int depth)
1929 {
1930 if( CHECK_DEBUGLVL(level) ) {
1931 dbgtext("%*s", depth*4, "");
1932 }
1933 return "";
1934 }
1935
1936 /*****************************************************************************
1937 Provide a checksum on a string
1938
1939 Input: s - the null-terminated character string for which the checksum
1940 will be calculated.
1941
1942 Output: The checksum value calculated for s.
1943 *****************************************************************************/
1944
1945 int str_checksum(const char *s)
1946 {
1947 int res = 0;
1948 int c;
1949 int i=0;
1950
1951 while(*s) {
1952 c = *s;
1953 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
1954 s++;
1955 i++;
1956 }
1957 return(res);
1958 }
1959
1960 /*****************************************************************
1961 Zero a memory area then free it. Used to catch bugs faster.
1962 *****************************************************************/
1963
1964 void zero_free(void *p, size_t size)
1965 {
1966 memset(p, 0, size);
1967 SAFE_FREE(p);
1968 }
1969
1970 /*****************************************************************
1971 Set our open file limit to a requested max and return the limit.
1972 *****************************************************************/
1973
1974 int set_maxfiles(int requested_max)
1975 {
1976 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1977 struct rlimit rlp;
1978 int saved_current_limit;
1979
1980 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1981 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1982 strerror(errno) ));
1983 /* just guess... */
1984 return requested_max;
1985 }
1986
1987 /*
1988 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1989 * account for the extra fd we need
1990 * as well as the log files and standard
1991 * handles etc. Save the limit we want to set in case
1992 * we are running on an OS that doesn't support this limit (AIX)
1993 * which always returns RLIM_INFINITY for rlp.rlim_max.
1994 */
1995
1996 /* Try raising the hard (max) limit to the requested amount. */
1997
1998 #if defined(RLIM_INFINITY)
1999 if (rlp.rlim_max != RLIM_INFINITY) {
2000 int orig_max = rlp.rlim_max;
2001
2002 if ( rlp.rlim_max < requested_max )
2003 rlp.rlim_max = requested_max;
2004
2005 /* This failing is not an error - many systems (Linux) don't
2006 support our default request of 10,000 open files. JRA. */
2007
2008 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2009 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2010 (int)rlp.rlim_max, strerror(errno) ));
2011
2012 /* Set failed - restore original value from get. */
2013 rlp.rlim_max = orig_max;
2014 }
2015 }
2016 #endif
2017
2018 /* Now try setting the soft (current) limit. */
2019
2020 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2021
2022 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2023 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2024 (int)rlp.rlim_cur, strerror(errno) ));
2025 /* just guess... */
2026 return saved_current_limit;
2027 }
2028
2029 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2030 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2031 strerror(errno) ));
2032 /* just guess... */
2033 return saved_current_limit;
2034 }
2035
2036 #if defined(RLIM_INFINITY)
2037 if(rlp.rlim_cur == RLIM_INFINITY)
2038 return saved_current_limit;
2039 #endif
2040
2041 if((int)rlp.rlim_cur > saved_current_limit)
2042 return saved_current_limit;
2043
2044 return rlp.rlim_cur;
2045 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2046 /*
2047 * No way to know - just guess...
2048 */
2049 return requested_max;
2050 #endif
2051 }
2052
2053 /*****************************************************************
2054 malloc that aborts with smb_panic on fail or zero size.
2055 *****************************************************************/
2056
2057 void *smb_xmalloc_array(size_t size, unsigned int count)
2058 {
2059 void *p;
2060 if (size == 0) {
2061 smb_panic("smb_xmalloc_array: called with zero size");
2062 }
2063 if (count >= MAX_ALLOC_SIZE/size) {
2064 smb_panic("smb_xmalloc_array: alloc size too large");
2065 }
2066 if ((p = SMB_MALLOC(size*count)) == NULL) {
2067 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2068 (unsigned long)size, (unsigned long)count));
2069 smb_panic("smb_xmalloc_array: malloc failed");
2070 }
2071 return p;
2072 }
2073
2074 /*
2075 vasprintf that aborts on malloc fail
2076 */
2077
2078 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2079 {
2080 int n;
2081 va_list ap2;
2082
2083 va_copy(ap2, ap);
2084
2085 n = vasprintf(ptr, format, ap2);
2086 va_end(ap2);
2087 if (n == -1 || ! *ptr) {
2088 smb_panic("smb_xvasprintf: out of memory");
2089 }
2090 return n;
2091 }
2092
2093 /*****************************************************************
2094 Get local hostname and cache result.
2095 *****************************************************************/
2096
2097 char *myhostname(void)
2098 {
2099 static char *ret;
2100 if (ret == NULL) {
2101 /* This is cached forever so
2102 * use talloc_autofree_context() ctx. */
2103 ret = get_myname(talloc_autofree_context());
2104 }
2105 return ret;
2106 }
2107
2108 /**
2109 * @brief Returns an absolute path to a file concatenating the provided
2110 * @a rootpath and @a basename
2111 *
2112 * @param name Filename, relative to @a rootpath
2113 *
2114 * @retval Pointer to a string containing the full path.
2115 **/
2116
2117 static char *xx_path(const char *name, const char *rootpath)
2118 {
2119 char *fname = NULL;
2120
2121 fname = talloc_strdup(talloc_tos(), rootpath);
2122 if (!fname) {
2123 return NULL;
2124 }
2125 trim_string(fname,"","/");
2126
2127 if (!directory_exist(fname)) {
2128 if (!mkdir(fname,0755))
2129 DEBUG(1, ("Unable to create directory %s for file %s. "
2130 "Error was %s\n", fname, name, strerror(errno)));
2131 }
2132
2133 return talloc_asprintf(talloc_tos(),
2134 "%s/%s",
2135 fname,
2136 name);
2137 }
2138
2139 /**
2140 * @brief Returns an absolute path to a file in the Samba lock directory.
2141 *
2142 * @param name File to find, relative to LOCKDIR.
2143 *
2144 * @retval Pointer to a talloc'ed string containing the full path.
2145 **/
2146
2147 char *lock_path(const char *name)
2148 {
2149 return xx_path(name, lp_lockdir());
2150 }
2151
2152 /**
2153 * @brief Returns an absolute path to a file in the Samba pid directory.
2154 *
2155 * @param name File to find, relative to PIDDIR.
2156 *
2157 * @retval Pointer to a talloc'ed string containing the full path.
2158 **/
2159
2160 char *pid_path(const char *name)
2161 {
2162 return xx_path(name, lp_piddir());
2163 }
2164
2165 /**
2166 * @brief Returns an absolute path to a file in the Samba lib directory.
2167 *
2168 * @param name File to find, relative to LIBDIR.
2169 *
2170 * @retval Pointer to a string containing the full path.
2171 **/
2172
2173 char *lib_path(const char *name)
2174 {
2175 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2176 }
2177
2178 /**
2179 * @brief Returns an absolute path to a file in the Samba modules directory.
2180 *
2181 * @param name File to find, relative to MODULESDIR.
2182 *
2183 * @retval Pointer to a string containing the full path.
2184 **/
2185
2186 char *modules_path(const char *name)
2187 {
2188 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2189 }
2190
2191 /**
2192 * @brief Returns an absolute path to a file in the Samba data directory.
2193 *
2194 * @param name File to find, relative to CODEPAGEDIR.
2195 *
2196 * @retval Pointer to a talloc'ed string containing the full path.
2197 **/
2198
2199 char *data_path(const char *name)
2200 {
2201 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2202 }
2203
2204 /**
2205 * @brief Returns an absolute path to a file in the Samba state directory.
2206 *
2207 * @param name File to find, relative to STATEDIR.
2208 *
2209 * @retval Pointer to a talloc'ed string containing the full path.
2210 **/
2211
2212 char *state_path(const char *name)
2213 {
2214 return xx_path(name, lp_statedir());
2215 }
2216
2217 /**
2218 * @brief Returns an absolute path to a file in the Samba cache directory.
2219 *
2220 * @param name File to find, relative to CACHEDIR.
2221 *
2222 * @retval Pointer to a talloc'ed string containing the full path.
2223 **/
2224
2225 char *cache_path(const char *name)
2226 {
2227 return xx_path(name, lp_cachedir());
2228 }
2229
2230 /**
2231 * @brief Returns the platform specific shared library extension.
2232 *
2233 * @retval Pointer to a const char * containing the extension.
2234 **/
2235
2236 const char *shlib_ext(void)
2237 {
2238 return get_dyn_SHLIBEXT();
2239 }
2240
2241 /*******************************************************************
2242 Given a filename - get its directory name
2243 ********************************************************************/
2244
2245 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
2246 const char **name)
2247 {
2248 char *p;
2249 ptrdiff_t len;
2250
2251 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2252
2253 if (p == NULL) {
2254 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2255 return False;
2256 }
2257 if (name) {
2258 *name = dir;
2259 }
2260 return True;
2261 }
2262
2263 len = p-dir;
2264
2265 if (!(*parent = (char *)TALLOC_MEMDUP(mem_ctx, dir, len+1))) {
2266 return False;
2267 }
2268 (*parent)[len] = '\0';
2269
2270 if (name) {
2271 *name = p+1;
2272 }
2273 return True;
2274 }
2275
2276 /*******************************************************************
2277 Determine if a pattern contains any Microsoft wildcard characters.
2278 *******************************************************************/
2279
2280 bool ms_has_wild(const char *s)
2281 {
2282 char c;
2283
2284 if (lp_posix_pathnames()) {
2285 /* With posix pathnames no characters are wild. */
2286 return False;
2287 }
2288
2289 while ((c = *s++)) {
2290 switch (c) {
2291 case '*':
2292 case '?':
2293 case '<':
2294 case '>':
2295 case '"':
2296 return True;
2297 }
2298 }
2299 return False;
2300 }
2301
2302 bool ms_has_wild_w(const smb_ucs2_t *s)
2303 {
2304 smb_ucs2_t c;
2305 if (!s) return False;
2306 while ((c = *s++)) {
2307 switch (c) {
2308 case UCS2_CHAR('*'):
2309 case UCS2_CHAR('?'):
2310 case UCS2_CHAR('<'):
2311 case UCS2_CHAR('>'):
2312 case UCS2_CHAR('"'):
2313 return True;
2314 }
2315 }
2316 return False;
2317 }
2318
2319 /*******************************************************************
2320 A wrapper that handles case sensitivity and the special handling
2321 of the ".." name.
2322 *******************************************************************/
2323
2324 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2325 {
2326 if (ISDOTDOT(string))
2327 string = ".";
2328 if (ISDOT(pattern))
2329 return False;
2330
2331 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2332 }
2333
2334 /*******************************************************************
2335 A wrapper that handles case sensitivity and the special handling
2336 of the ".." name. Varient that is only called by old search code which requires
2337 pattern translation.
2338 *******************************************************************/
2339
2340 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2341 {
2342 if (ISDOTDOT(string))
2343 string = ".";
2344 if (ISDOT(pattern))
2345 return False;
2346
2347 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2348 }
2349
2350 /*******************************************************************
2351 A wrapper that handles a list of patters and calls mask_match()
2352 on each. Returns True if any of the patterns match.
2353 *******************************************************************/
2354
2355 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2356 {
2357 while (listLen-- > 0) {
2358 if (mask_match(string, *list++, is_case_sensitive))
2359 return True;
2360 }
2361 return False;
2362 }
2363
2364 /*********************************************************
2365 Recursive routine that is called by unix_wild_match.
2366 *********************************************************/
2367
2368 static bool unix_do_match(const char *regexp, const char *str)
2369 {
2370 const char *p;
2371
2372 for( p = regexp; *p && *str; ) {
2373
2374 switch(*p) {
2375 case '?':
2376 str++;
2377 p++;
2378 break;
2379
2380 case '*':
2381
2382 /*
2383 * Look for a character matching
2384 * the one after the '*'.
2385 */
2386 p++;
2387 if(!*p)
2388 return true; /* Automatic match */
2389 while(*str) {
2390
2391 while(*str && (*p != *str))
2392 str++;
2393
2394 /*
2395 * Patch from weidel@multichart.de. In the case of the regexp
2396 * '*XX*' we want to ensure there are at least 2 'X' characters
2397 * in the string after the '*' for a match to be made.
2398 */
2399
2400 {
2401 int matchcount=0;
2402
2403 /*
2404 * Eat all the characters that match, but count how many there were.
2405 */
2406
2407 while(*str && (*p == *str)) {
2408 str++;
2409 matchcount++;
2410 }
2411
2412 /*
2413 * Now check that if the regexp had n identical characters that
2414 * matchcount had at least that many matches.
2415 */
2416
2417 while ( *(p+1) && (*(p+1) == *p)) {
2418 p++;
2419 matchcount--;
2420 }
2421
2422 if ( matchcount <= 0 )
2423 return false;
2424 }
2425
2426 str--; /* We've eaten the match char after the '*' */
2427
2428 if(unix_do_match(p, str))
2429 return true;
2430
2431 if(!*str)
2432 return false;
2433 else
2434 str++;
2435 }
2436 return false;
2437
2438 default:
2439 if(*str != *p)
2440 return false;
2441 str++;
2442 p++;
2443 break;
2444 }
2445 }
2446
2447 if(!*p && !*str)
2448 return true;
2449
2450 if (!*p && str[0] == '.' && str[1] == 0)
2451 return true;
2452
2453 if (!*str && *p == '?') {
2454 while (*p == '?')
2455 p++;
2456 return(!*p);
2457 }
2458
2459 if(!*str && (*p == '*' && p[1] == '\0'))
2460 return true;
2461
2462 return false;
2463 }
2464
2465 /*******************************************************************
2466 Simple case insensitive interface to a UNIX wildcard matcher.
2467 Returns True if match, False if not.
2468 *******************************************************************/
2469
2470 bool unix_wild_match(const char *pattern, const char *string)
2471 {
2472 TALLOC_CTX *ctx = talloc_stackframe();
2473 char *p2;
2474 char *s2;
2475 char *p;
2476 bool ret = false;
2477
2478 p2 = talloc_strdup(ctx,pattern);
2479 s2 = talloc_strdup(ctx,string);
2480 if (!p2 || !s2) {
2481 TALLOC_FREE(ctx);
2482 return false;
2483 }
2484 strlower_m(p2);
2485 strlower_m(s2);
2486
2487 /* Remove any *? and ** from the pattern as they are meaningless */
2488 for(p = p2; *p; p++) {
2489 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2490 memmove(&p[1], &p[2], strlen(&p[2])+1);
2491 }
2492 }
2493
2494 if (strequal(p2,"*")) {
2495 TALLOC_FREE(ctx);
2496 return true;
2497 }
2498
2499 ret = unix_do_match(p2, s2);
2500 TALLOC_FREE(ctx);
2501 return ret;
2502 }
2503
2504 /**********************************************************************
2505 Converts a name to a fully qualified domain name.
2506 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2507 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2508 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2509 ***********************************************************************/
2510
2511 bool name_to_fqdn(fstring fqdn, const char *name)
2512 {
2513 char *full = NULL;
2514 struct hostent *hp = gethostbyname(name);
2515
2516 if (!hp || !hp->h_name || !*hp->h_name) {
2517 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2518 fstrcpy(fqdn, name);
2519 return false;
2520 }
2521
2522 /* Find out if the fqdn is returned as an alias
2523 * to cope with /etc/hosts files where the first
2524 * name is not the fqdn but the short name */
2525 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2526 int i;
2527 for (i = 0; hp->h_aliases[i]; i++) {
2528 if (strchr_m(hp->h_aliases[i], '.')) {
2529 full = hp->h_aliases[i];
2530 break;
2531 }
2532 }
2533 }
2534 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2535 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2536 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2537 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2538 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2539 full = hp->h_name;
2540 }
2541 if (!full) {
2542 full = hp->h_name;
2543 }
2544
2545 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2546 fstrcpy(fqdn, full);
2547 return true;
2548 }
2549
2550 /**********************************************************************
2551 Append a DATA_BLOB to a talloc'ed object
2552 ***********************************************************************/
2553
2554 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
2555 {
2556 size_t old_size = 0;
2557 char *result;
2558
2559 if (blob.length == 0) {
2560 return buf;
2561 }
2562
2563 if (buf != NULL) {
2564 old_size = talloc_get_size(buf);
2565 }
2566
2567 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
2568 if (result == NULL) {
2569 return NULL;
2570 }
2571
2572 memcpy(result + old_size, blob.data, blob.length);
2573 return result;
2574 }
2575
2576 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2577 {
2578 switch (share_access & ~FILE_SHARE_DELETE) {
2579 case FILE_SHARE_NONE:
2580 return DENY_ALL;
2581 case FILE_SHARE_READ:
2582 return DENY_WRITE;
2583 case FILE_SHARE_WRITE:
2584 return DENY_READ;
2585 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2586 return DENY_NONE;
2587 }
2588 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2589 return DENY_DOS;
2590 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2591 return DENY_FCB;
2592 }
2593
2594 return (uint32)-1;
2595 }
2596
2597 pid_t procid_to_pid(const struct server_id *proc)
2598 {
2599 return proc->pid;
2600 }
2601
2602 static uint32 my_vnn = NONCLUSTER_VNN;
2603
2604 void set_my_vnn(uint32 vnn)
2605 {
2606 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
2607 my_vnn = vnn;
2608 }
2609
2610 uint32 get_my_vnn(void)
2611 {
2612 return my_vnn;
2613 }
2614
2615 static uint64_t my_unique_id = 0;
2616
2617 void set_my_unique_id(uint64_t unique_id)
2618 {
2619 my_unique_id = unique_id;
2620 }
2621
2622 struct server_id pid_to_procid(pid_t pid)
2623 {
2624 struct server_id result;
2625 result.pid = pid;
2626 result.unique_id = my_unique_id;
2627 #ifdef CLUSTER_SUPPORT
2628 result.vnn = my_vnn;
2629 #endif
2630 return result;
2631 }
2632
2633 struct server_id procid_self(void)
2634 {
2635 return pid_to_procid(sys_getpid());
2636 }
2637
2638 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
2639 {
2640 if (p1->pid != p2->pid)
2641 return False;
2642 #ifdef CLUSTER_SUPPORT
2643 if (p1->vnn != p2->vnn)
2644 return False;
2645 #endif
2646 return True;
2647 }
2648
2649 bool cluster_id_equal(const struct server_id *id1,
2650 const struct server_id *id2)
2651 {
2652 return procid_equal(id1, id2);
2653 }
2654
2655 bool procid_is_me(const struct server_id *pid)
2656 {
2657 if (pid->pid != sys_getpid())
2658 return False;
2659 #ifdef CLUSTER_SUPPORT
2660 if (pid->vnn != my_vnn)
2661 return False;
2662 #endif
2663 return True;
2664 }
2665
2666 struct server_id interpret_pid(const char *pid_string)
2667 {
2668 struct server_id result;
2669 int pid;
2670 #ifdef CLUSTER_SUPPORT
2671 unsigned int vnn;
2672 if (sscanf(pid_string, "%u:%d", &vnn, &pid) == 2) {
2673 result.vnn = vnn;
2674 result.pid = pid;
2675 }
2676 else if (sscanf(pid_string, "%d", &pid) == 1) {
2677 result.vnn = get_my_vnn();
2678 result.pid = pid;
2679 }
2680 else {
2681 result.vnn = NONCLUSTER_VNN;
2682 result.pid = -1;
2683 }
2684 #else
2685 if (sscanf(pid_string, "%d", &pid) != 1) {
2686 result.pid = -1;
2687 } else {
2688 result.pid = pid;
2689 }
2690 #endif
2691 /* Assigning to result.pid may have overflowed
2692 Map negative pid to -1: i.e. error */
2693 if (result.pid < 0) {
2694 result.pid = -1;
2695 }
2696 result.unique_id = 0;
2697 return result;
2698 }
2699
2700 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
2701 {
2702 #ifdef CLUSTER_SUPPORT
2703 if (pid->vnn == NONCLUSTER_VNN) {
2704 return talloc_asprintf(mem_ctx,
2705 "%d",
2706 (int)pid->pid);
2707 }
2708 else {
2709 return talloc_asprintf(mem_ctx,
2710 "%u:%d",
2711 (unsigned)pid->vnn,
2712 (int)pid->pid);
2713 }
2714 #else
2715 return talloc_asprintf(mem_ctx,
2716 "%d",
2717 (int)pid->pid);
2718 #endif
2719 }
2720
2721 char *procid_str_static(const struct server_id *pid)
2722 {
2723 return procid_str(talloc_tos(), pid);
2724 }
2725
2726 bool procid_valid(const struct server_id *pid)
2727 {
2728 return (pid->pid != -1);
2729 }
2730
2731 bool procid_is_local(const struct server_id *pid)
2732 {
2733 #ifdef CLUSTER_SUPPORT
2734 return pid->vnn == my_vnn;
2735 #else
2736 return True;
2737 #endif
2738 }
2739
2740 /****************************************************************
2741 Check if offset/length fit into bufsize. Should probably be
2742 merged with is_offset_safe, but this would require a rewrite
2743 of lanman.c. Later :-)
2744 ****************************************************************/
2745
2746 bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
2747 {
2748 if ((offset + length < offset) || (offset + length < length)) {
2749 /* wrap */
2750 return true;
2751 }
2752 if ((offset > bufsize) || (offset + length > bufsize)) {
2753 /* overflow */
2754 return true;
2755 }
2756 return false;
2757 }
2758
2759 /****************************************************************
2760 Check if an offset into a buffer is safe.
2761 If this returns True it's safe to indirect into the byte at
2762 pointer ptr+off.
2763 ****************************************************************/
2764
2765 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2766 {
2767 const char *end_base = buf_base + buf_len;
2768 char *end_ptr = ptr + off;
2769
2770 if (!buf_base || !ptr) {
2771 return False;
2772 }
2773
2774 if (end_base < buf_base || end_ptr < ptr) {
2775 return False; /* wrap. */
2776 }
2777
2778 if (end_ptr < end_base) {
2779 return True;
2780 }
2781 return False;
2782 }
2783
2784 /****************************************************************
2785 Return a safe pointer into a buffer, or NULL.
2786 ****************************************************************/
2787
2788 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2789 {
2790 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2791 ptr + off : NULL;
2792 }
2793
2794 /****************************************************************
2795 Return a safe pointer into a string within a buffer, or NULL.
2796 ****************************************************************/
2797
2798 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2799 {
2800 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2801 return NULL;
2802 }
2803 /* Check if a valid string exists at this offset. */
2804 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2805 return NULL;
2806 }
2807 return ptr + off;
2808 }
2809
2810 /****************************************************************
2811 Return an SVAL at a pointer, or failval if beyond the end.
2812 ****************************************************************/
2813
2814 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2815 {
2816 /*
2817 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2818 * NOT ptr[2].
2819 */
2820 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2821 return failval;
2822 }
2823 return SVAL(ptr,off);
2824 }
2825
2826 /****************************************************************
2827 Return an IVAL at a pointer, or failval if beyond the end.
2828 ****************************************************************/
2829
2830 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2831 {
2832 /*
2833 * Note we use off+3 here, not off+4 as IVAL accesses
2834 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2835 */
2836 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2837 return failval;
2838 }
2839 return IVAL(ptr,off);
2840 }
2841
2842 /****************************************************************
2843 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2844 call (they take care of winbind separator and other winbind specific settings).
2845 ****************************************************************/
2846
2847 void split_domain_user(TALLOC_CTX *mem_ctx,
2848 const char *full_name,
2849 char **domain,
2850 char **user)
2851 {
2852 const char *p = NULL;
2853
2854 p = strchr_m(full_name, '\\');
2855
2856 if (p != NULL) {
2857 *domain = talloc_strndup(mem_ctx, full_name,
2858 PTR_DIFF(p, full_name));
2859 *user = talloc_strdup(mem_ctx, p+1);
2860 } else {
2861 *domain = talloc_strdup(mem_ctx, "");
2862 *user = talloc_strdup(mem_ctx, full_name);
2863 }
2864 }
2865
2866 #if 0
2867
2868 Disable these now we have checked all code paths and ensured
2869 NULL returns on zero request. JRA.
2870
2871 /****************************************************************
2872 talloc wrapper functions that guarentee a null pointer return
2873 if size == 0.
2874 ****************************************************************/
2875
2876 #ifndef MAX_TALLOC_SIZE
2877 #define MAX_TALLOC_SIZE 0x10000000
2878 #endif
2879
2880 /*
2881 * talloc and zero memory.
2882 * - returns NULL if size is zero.
2883 */
2884
2885 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
2886 {
2887 void *p;
2888
2889 if (size == 0) {
2890 return NULL;
2891 }
2892
2893 p = talloc_named_const(ctx, size, name);
2894
2895 if (p) {
2896 memset(p, '\0', size);
2897 }
2898
2899 return p;
2900 }
2901
2902 /*
2903 * memdup with a talloc.
2904 * - returns NULL if size is zero.
2905 */
2906
2907 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
2908 {
2909 void *newp;
2910
2911 if (size == 0) {
2912 return NULL;
2913 }
2914
2915 newp = talloc_named_const(t, size, name);
2916 if (newp) {
2917 memcpy(newp, p, size);
2918 }
2919
2920 return newp;
2921 }
2922
2923 /*
2924 * alloc an array, checking for integer overflow in the array size.
2925 * - returns NULL if count or el_size are zero.
2926 */
2927
2928 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2929 {
2930 if (count >= MAX_TALLOC_SIZE/el_size) {
2931 return NULL;
2932 }
2933
2934 if (el_size == 0 || count == 0) {
2935 return NULL;
2936 }
2937
2938 return talloc_named_const(ctx, el_size * count, name);
2939 }
2940
2941 /*
2942 * alloc an zero array, checking for integer overflow in the array size
2943 * - returns NULL if count or el_size are zero.
2944 */
2945
2946 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
2947 {
2948 if (count >= MAX_TALLOC_SIZE/el_size) {
2949 return NULL;
2950 }
2951
2952 if (el_size == 0 || count == 0) {
2953 return NULL;
2954 }
2955
2956 return _talloc_zero(ctx, el_size * count, name);
2957 }
2958
2959 /*
2960 * Talloc wrapper that returns NULL if size == 0.
2961 */
2962 void *talloc_zeronull(const void *context, size_t size, const char *name)
2963 {
2964 if (size == 0) {
2965 return NULL;
2966 }
2967 return talloc_named_const(context, size, name);
2968 }
2969 #endif
2970
2971 bool is_valid_policy_hnd(const struct policy_handle *hnd)
2972 {
2973 struct policy_handle tmp;
2974 ZERO_STRUCT(tmp);
2975 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
2976 }
2977
2978 bool policy_hnd_equal(const struct policy_handle *hnd1,
2979 const struct policy_handle *hnd2)
2980 {
2981 if (!hnd1 || !hnd2) {
2982 return false;
2983 }
2984
2985 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
2986 }
2987
2988 /****************************************************************
2989 strip off leading '\\' from a hostname
2990 ****************************************************************/
2991
2992 const char *strip_hostname(const char *s)
2993 {
2994 if (!s) {
2995 return NULL;
2996 }
2997
2998 if (strlen_m(s) < 3) {
2999 return s;
3000 }
3001
3002 if (s[0] == '\\') s++;
3003 if (s[0] == '\\') s++;
3004
3005 return s;
3006 }
3007
3008 bool tevent_req_poll_ntstatus(struct tevent_req *req,
3009 struct tevent_context *ev,
3010 NTSTATUS *status)
3011 {
3012 bool ret = tevent_req_poll(req, ev);
3013 if (!ret) {
3014 *status = map_nt_error_from_unix(errno);
3015 }
3016 return ret;
3017 }
reg import