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Make us clean under valgrind --leak-check=full by using talloc_autofree_context(...
[Samba.git] / source / lib / util.c
blob4b8b5975287506515db6fef49341e77d9645a036
1 /*
2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2007
6 Copyright (C) Simo Sorce 2001
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8 Copyright (C) James Peach 2006
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25
26 extern char *global_clobber_region_function;
27 extern unsigned int global_clobber_region_line;
28
29 /* Max allowable allococation - 256mb - 0x10000000 */
30 #define MAX_ALLOC_SIZE (1024*1024*256)
31
32 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
33 #ifdef WITH_NISPLUS_HOME
34 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
35 /*
36 * The following lines are needed due to buggy include files
37 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
38 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
39 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
40 * an enum in /usr/include/rpcsvc/nis.h.
41 */
42
43 #if defined(GROUP)
44 #undef GROUP
45 #endif
46
47 #if defined(GROUP_OBJ)
48 #undef GROUP_OBJ
49 #endif
50
51 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
52
53 #include <rpcsvc/nis.h>
54
55 #endif /* WITH_NISPLUS_HOME */
56 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
57
58 enum protocol_types Protocol = PROTOCOL_COREPLUS;
59
60 /* this is used by the chaining code */
61 int chain_size = 0;
62
63 static enum remote_arch_types ra_type = RA_UNKNOWN;
64
65 /***********************************************************************
66 Definitions for all names.
67 ***********************************************************************/
68
69 static char *smb_myname;
70 static char *smb_myworkgroup;
71 static char *smb_scope;
72 static int smb_num_netbios_names;
73 static char **smb_my_netbios_names;
74
75 /***********************************************************************
76 Allocate and set myname. Ensure upper case.
77 ***********************************************************************/
78
79 bool set_global_myname(const char *myname)
80 {
81 SAFE_FREE(smb_myname);
82 smb_myname = SMB_STRDUP(myname);
83 if (!smb_myname)
84 return False;
85 strupper_m(smb_myname);
86 return True;
87 }
88
89 const char *global_myname(void)
90 {
91 return smb_myname;
92 }
93
94 /***********************************************************************
95 Allocate and set myworkgroup. Ensure upper case.
96 ***********************************************************************/
97
98 bool set_global_myworkgroup(const char *myworkgroup)
99 {
100 SAFE_FREE(smb_myworkgroup);
101 smb_myworkgroup = SMB_STRDUP(myworkgroup);
102 if (!smb_myworkgroup)
103 return False;
104 strupper_m(smb_myworkgroup);
105 return True;
106 }
107
108 const char *lp_workgroup(void)
109 {
110 return smb_myworkgroup;
111 }
112
113 /***********************************************************************
114 Allocate and set scope. Ensure upper case.
115 ***********************************************************************/
116
117 bool set_global_scope(const char *scope)
118 {
119 SAFE_FREE(smb_scope);
120 smb_scope = SMB_STRDUP(scope);
121 if (!smb_scope)
122 return False;
123 strupper_m(smb_scope);
124 return True;
125 }
126
127 /*********************************************************************
128 Ensure scope is never null string.
129 *********************************************************************/
130
131 const char *global_scope(void)
132 {
133 if (!smb_scope)
134 set_global_scope("");
135 return smb_scope;
136 }
137
138 static void free_netbios_names_array(void)
139 {
140 int i;
141
142 for (i = 0; i < smb_num_netbios_names; i++)
143 SAFE_FREE(smb_my_netbios_names[i]);
144
145 SAFE_FREE(smb_my_netbios_names);
146 smb_num_netbios_names = 0;
147 }
148
149 static bool allocate_my_netbios_names_array(size_t number)
150 {
151 free_netbios_names_array();
152
153 smb_num_netbios_names = number + 1;
154 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
155
156 if (!smb_my_netbios_names)
157 return False;
158
159 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
160 return True;
161 }
162
163 static bool set_my_netbios_names(const char *name, int i)
164 {
165 SAFE_FREE(smb_my_netbios_names[i]);
166
167 smb_my_netbios_names[i] = SMB_STRDUP(name);
168 if (!smb_my_netbios_names[i])
169 return False;
170 strupper_m(smb_my_netbios_names[i]);
171 return True;
172 }
173
174 /***********************************************************************
175 Free memory allocated to global objects
176 ***********************************************************************/
177
178 void gfree_names(void)
179 {
180 SAFE_FREE( smb_myname );
181 SAFE_FREE( smb_myworkgroup );
182 SAFE_FREE( smb_scope );
183 free_netbios_names_array();
184 free_local_machine_name();
185 }
186
187 void gfree_all( void )
188 {
189 gfree_names();
190 gfree_loadparm();
191 gfree_case_tables();
192 gfree_charcnv();
193 gfree_interfaces();
194 gfree_debugsyms();
195 }
196
197 const char *my_netbios_names(int i)
198 {
199 return smb_my_netbios_names[i];
200 }
201
202 bool set_netbios_aliases(const char **str_array)
203 {
204 size_t namecount;
205
206 /* Work out the max number of netbios aliases that we have */
207 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
208 ;
209
210 if ( global_myname() && *global_myname())
211 namecount++;
212
213 /* Allocate space for the netbios aliases */
214 if (!allocate_my_netbios_names_array(namecount))
215 return False;
216
217 /* Use the global_myname string first */
218 namecount=0;
219 if ( global_myname() && *global_myname()) {
220 set_my_netbios_names( global_myname(), namecount );
221 namecount++;
222 }
223
224 if (str_array) {
225 size_t i;
226 for ( i = 0; str_array[i] != NULL; i++) {
227 size_t n;
228 bool duplicate = False;
229
230 /* Look for duplicates */
231 for( n=0; n<namecount; n++ ) {
232 if( strequal( str_array[i], my_netbios_names(n) ) ) {
233 duplicate = True;
234 break;
235 }
236 }
237 if (!duplicate) {
238 if (!set_my_netbios_names(str_array[i], namecount))
239 return False;
240 namecount++;
241 }
242 }
243 }
244 return True;
245 }
246
247 /****************************************************************************
248 Common name initialization code.
249 ****************************************************************************/
250
251 bool init_names(void)
252 {
253 int n;
254
255 if (global_myname() == NULL || *global_myname() == '\0') {
256 if (!set_global_myname(myhostname())) {
257 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
258 return False;
259 }
260 }
261
262 if (!set_netbios_aliases(lp_netbios_aliases())) {
263 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
264 return False;
265 }
266
267 set_local_machine_name(global_myname(),false);
268
269 DEBUG( 5, ("Netbios name list:-\n") );
270 for( n=0; my_netbios_names(n); n++ ) {
271 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
272 n, my_netbios_names(n) ) );
273 }
274
275 return( True );
276 }
277
278 /**************************************************************************n
279 Code to cope with username/password auth options from the commandline.
280 Used mainly in client tools.
281 ****************************************************************************/
282
283 static struct user_auth_info cmdline_auth_info = {
284 NULL, /* username */
285 NULL, /* password */
286 false, /* got_pass */
287 false, /* use_kerberos */
288 Undefined, /* signing state */
289 false, /* smb_encrypt */
290 false /* use machine account */
291 };
292
293 const char *get_cmdline_auth_info_username(void)
294 {
295 if (!cmdline_auth_info.username) {
296 return "";
297 }
298 return cmdline_auth_info.username;
299 }
300
301 void set_cmdline_auth_info_username(const char *username)
302 {
303 SAFE_FREE(cmdline_auth_info.username);
304 cmdline_auth_info.username = SMB_STRDUP(username);
305 if (!cmdline_auth_info.username) {
306 exit(ENOMEM);
307 }
308 }
309
310 const char *get_cmdline_auth_info_password(void)
311 {
312 if (!cmdline_auth_info.password) {
313 return "";
314 }
315 return cmdline_auth_info.password;
316 }
317
318 void set_cmdline_auth_info_password(const char *password)
319 {
320 SAFE_FREE(cmdline_auth_info.password);
321 cmdline_auth_info.password = SMB_STRDUP(password);
322 if (!cmdline_auth_info.password) {
323 exit(ENOMEM);
324 }
325 cmdline_auth_info.got_pass = true;
326 }
327
328 bool set_cmdline_auth_info_signing_state(const char *arg)
329 {
330 cmdline_auth_info.signing_state = -1;
331 if (strequal(arg, "off") || strequal(arg, "no") ||
332 strequal(arg, "false")) {
333 cmdline_auth_info.signing_state = false;
334 } else if (strequal(arg, "on") || strequal(arg, "yes") ||
335 strequal(arg, "true") || strequal(arg, "auto")) {
336 cmdline_auth_info.signing_state = true;
337 } else if (strequal(arg, "force") || strequal(arg, "required") ||
338 strequal(arg, "forced")) {
339 cmdline_auth_info.signing_state = Required;
340 } else {
341 return false;
342 }
343 return true;
344 }
345
346 int get_cmdline_auth_info_signing_state(void)
347 {
348 return cmdline_auth_info.signing_state;
349 }
350
351 void set_cmdline_auth_info_use_kerberos(bool b)
352 {
353 cmdline_auth_info.use_kerberos = b;
354 }
355
356 bool get_cmdline_auth_info_use_kerberos(void)
357 {
358 return cmdline_auth_info.use_kerberos;
359 }
360
361 /* This should only be used by lib/popt_common.c JRA */
362 void set_cmdline_auth_info_use_krb5_ticket(void)
363 {
364 cmdline_auth_info.use_kerberos = true;
365 cmdline_auth_info.got_pass = true;
366 }
367
368 /* This should only be used by lib/popt_common.c JRA */
369 void set_cmdline_auth_info_smb_encrypt(void)
370 {
371 cmdline_auth_info.smb_encrypt = true;
372 }
373
374 void set_cmdline_auth_info_use_machine_account(void)
375 {
376 cmdline_auth_info.use_machine_account = true;
377 }
378
379 bool get_cmdline_auth_info_got_pass(void)
380 {
381 return cmdline_auth_info.got_pass;
382 }
383
384 bool get_cmdline_auth_info_smb_encrypt(void)
385 {
386 return cmdline_auth_info.smb_encrypt;
387 }
388
389 bool get_cmdline_auth_info_use_machine_account(void)
390 {
391 return cmdline_auth_info.use_machine_account;
392 }
393
394 bool get_cmdline_auth_info_copy(struct user_auth_info *info)
395 {
396 *info = cmdline_auth_info;
397 /* Now re-alloc the strings. */
398 info->username = SMB_STRDUP(get_cmdline_auth_info_username());
399 info->password = SMB_STRDUP(get_cmdline_auth_info_password());
400 if (!info->username || !info->password) {
401 return false;
402 }
403 return true;
404 }
405
406 bool set_cmdline_auth_info_machine_account_creds(void)
407 {
408 char *pass = NULL;
409 char *account = NULL;
410
411 if (!get_cmdline_auth_info_use_machine_account()) {
412 return false;
413 }
414
415 if (!secrets_init()) {
416 d_printf("ERROR: Unable to open secrets database\n");
417 return false;
418 }
419
420 if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
421 return false;
422 }
423
424 pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
425 if (!pass) {
426 d_printf("ERROR: Unable to fetch machine password for "
427 "%s in domain %s\n",
428 account, lp_workgroup());
429 SAFE_FREE(account);
430 return false;
431 }
432
433 set_cmdline_auth_info_username(account);
434 set_cmdline_auth_info_password(pass);
435
436 SAFE_FREE(account);
437 SAFE_FREE(pass);
438
439 return true;
440 }
441
442 /**************************************************************************n
443 Find a suitable temporary directory. The result should be copied immediately
444 as it may be overwritten by a subsequent call.
445 ****************************************************************************/
446
447 const char *tmpdir(void)
448 {
449 char *p;
450 if ((p = getenv("TMPDIR")))
451 return p;
452 return "/tmp";
453 }
454
455 /****************************************************************************
456 Add a gid to an array of gids if it's not already there.
457 ****************************************************************************/
458
459 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
460 gid_t **gids, size_t *num_gids)
461 {
462 int i;
463
464 if ((*num_gids != 0) && (*gids == NULL)) {
465 /*
466 * A former call to this routine has failed to allocate memory
467 */
468 return False;
469 }
470
471 for (i=0; i<*num_gids; i++) {
472 if ((*gids)[i] == gid) {
473 return True;
474 }
475 }
476
477 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
478 if (*gids == NULL) {
479 *num_gids = 0;
480 return False;
481 }
482
483 (*gids)[*num_gids] = gid;
484 *num_gids += 1;
485 return True;
486 }
487
488 /****************************************************************************
489 Like atoi but gets the value up to the separator character.
490 ****************************************************************************/
491
492 static const char *Atoic(const char *p, int *n, const char *c)
493 {
494 if (!isdigit((int)*p)) {
495 DEBUG(5, ("Atoic: malformed number\n"));
496 return NULL;
497 }
498
499 (*n) = atoi(p);
500
501 while ((*p) && isdigit((int)*p))
502 p++;
503
504 if (strchr_m(c, *p) == NULL) {
505 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
506 return NULL;
507 }
508
509 return p;
510 }
511
512 /*************************************************************************
513 Reads a list of numbers.
514 *************************************************************************/
515
516 const char *get_numlist(const char *p, uint32 **num, int *count)
517 {
518 int val;
519
520 if (num == NULL || count == NULL)
521 return NULL;
522
523 (*count) = 0;
524 (*num ) = NULL;
525
526 while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
527 *num = SMB_REALLOC_ARRAY((*num), uint32, (*count)+1);
528 if (!(*num)) {
529 return NULL;
530 }
531 (*num)[(*count)] = val;
532 (*count)++;
533 p++;
534 }
535
536 return p;
537 }
538
539 /*******************************************************************
540 Check if a file exists - call vfs_file_exist for samba files.
541 ********************************************************************/
542
543 bool file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
544 {
545 SMB_STRUCT_STAT st;
546 if (!sbuf)
547 sbuf = &st;
548
549 if (sys_stat(fname,sbuf) != 0)
550 return(False);
551
552 return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
553 }
554
555 /*******************************************************************
556 Check if a unix domain socket exists - call vfs_file_exist for samba files.
557 ********************************************************************/
558
559 bool socket_exist(const char *fname)
560 {
561 SMB_STRUCT_STAT st;
562 if (sys_stat(fname,&st) != 0)
563 return(False);
564
565 return S_ISSOCK(st.st_mode);
566 }
567
568 /*******************************************************************
569 Check a files mod time.
570 ********************************************************************/
571
572 time_t file_modtime(const char *fname)
573 {
574 SMB_STRUCT_STAT st;
575
576 if (sys_stat(fname,&st) != 0)
577 return(0);
578
579 return(st.st_mtime);
580 }
581
582 /*******************************************************************
583 Check if a directory exists.
584 ********************************************************************/
585
586 bool directory_exist(char *dname,SMB_STRUCT_STAT *st)
587 {
588 SMB_STRUCT_STAT st2;
589 bool ret;
590
591 if (!st)
592 st = &st2;
593
594 if (sys_stat(dname,st) != 0)
595 return(False);
596
597 ret = S_ISDIR(st->st_mode);
598 if(!ret)
599 errno = ENOTDIR;
600 return ret;
601 }
602
603 /*******************************************************************
604 Returns the size in bytes of the named file.
605 ********************************************************************/
606
607 SMB_OFF_T get_file_size(char *file_name)
608 {
609 SMB_STRUCT_STAT buf;
610 buf.st_size = 0;
611 if(sys_stat(file_name,&buf) != 0)
612 return (SMB_OFF_T)-1;
613 return(buf.st_size);
614 }
615
616 /*******************************************************************
617 Return a string representing an attribute for a file.
618 ********************************************************************/
619
620 char *attrib_string(uint16 mode)
621 {
622 fstring attrstr;
623
624 attrstr[0] = 0;
625
626 if (mode & aVOLID) fstrcat(attrstr,"V");
627 if (mode & aDIR) fstrcat(attrstr,"D");
628 if (mode & aARCH) fstrcat(attrstr,"A");
629 if (mode & aHIDDEN) fstrcat(attrstr,"H");
630 if (mode & aSYSTEM) fstrcat(attrstr,"S");
631 if (mode & aRONLY) fstrcat(attrstr,"R");
632
633 return talloc_strdup(talloc_tos(), attrstr);
634 }
635
636 /*******************************************************************
637 Show a smb message structure.
638 ********************************************************************/
639
640 void show_msg(char *buf)
641 {
642 int i;
643 int bcc=0;
644
645 if (!DEBUGLVL(5))
646 return;
647
648 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
649 smb_len(buf),
650 (int)CVAL(buf,smb_com),
651 (int)CVAL(buf,smb_rcls),
652 (int)CVAL(buf,smb_reh),
653 (int)SVAL(buf,smb_err),
654 (int)CVAL(buf,smb_flg),
655 (int)SVAL(buf,smb_flg2)));
656 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
657 (int)SVAL(buf,smb_tid),
658 (int)SVAL(buf,smb_pid),
659 (int)SVAL(buf,smb_uid),
660 (int)SVAL(buf,smb_mid)));
661 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
662
663 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
664 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
665 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
666
667 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
668
669 DEBUGADD(5,("smb_bcc=%d\n",bcc));
670
671 if (DEBUGLEVEL < 10)
672 return;
673
674 if (DEBUGLEVEL < 50)
675 bcc = MIN(bcc, 512);
676
677 dump_data(10, (uint8 *)smb_buf(buf), bcc);
678 }
679
680 /*******************************************************************
681 Set the length and marker of an encrypted smb packet.
682 ********************************************************************/
683
684 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
685 {
686 _smb_setlen(buf,len);
687
688 SCVAL(buf,4,0xFF);
689 SCVAL(buf,5,'E');
690 SSVAL(buf,6,enc_ctx_num);
691 }
692
693 /*******************************************************************
694 Set the length and marker of an smb packet.
695 ********************************************************************/
696
697 void smb_setlen(char *buf,int len)
698 {
699 _smb_setlen(buf,len);
700
701 SCVAL(buf,4,0xFF);
702 SCVAL(buf,5,'S');
703 SCVAL(buf,6,'M');
704 SCVAL(buf,7,'B');
705 }
706
707 /*******************************************************************
708 Setup only the byte count for a smb message.
709 ********************************************************************/
710
711 int set_message_bcc(char *buf,int num_bytes)
712 {
713 int num_words = CVAL(buf,smb_wct);
714 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
715 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
716 return (smb_size + num_words*2 + num_bytes);
717 }
718
719 /*******************************************************************
720 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
721 Return the bytes added
722 ********************************************************************/
723
724 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
725 {
726 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
727 uint8 *tmp;
728
729 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
730 DEBUG(0, ("talloc failed\n"));
731 return -1;
732 }
733 *outbuf = tmp;
734
735 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
736 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
737 return blob.length;
738 }
739
740 /*******************************************************************
741 Reduce a file name, removing .. elements.
742 ********************************************************************/
743
744 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
745 {
746 char *p = NULL;
747 char *str = NULL;
748
749 DEBUG(3,("dos_clean_name [%s]\n",s));
750
751 /* remove any double slashes */
752 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
753 if (!str) {
754 return NULL;
755 }
756
757 /* Remove leading .\\ characters */
758 if(strncmp(str, ".\\", 2) == 0) {
759 trim_string(str, ".\\", NULL);
760 if(*str == 0) {
761 str = talloc_strdup(ctx, ".\\");
762 if (!str) {
763 return NULL;
764 }
765 }
766 }
767
768 while ((p = strstr_m(str,"\\..\\")) != NULL) {
769 char *s1;
770
771 *p = 0;
772 s1 = p+3;
773
774 if ((p=strrchr_m(str,'\\')) != NULL) {
775 *p = 0;
776 } else {
777 *str = 0;
778 }
779 str = talloc_asprintf(ctx,
780 "%s%s",
781 str,
782 s1);
783 if (!str) {
784 return NULL;
785 }
786 }
787
788 trim_string(str,NULL,"\\..");
789 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
790 }
791
792 /*******************************************************************
793 Reduce a file name, removing .. elements.
794 ********************************************************************/
795
796 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
797 {
798 char *p = NULL;
799 char *str = NULL;
800
801 DEBUG(3,("unix_clean_name [%s]\n",s));
802
803 /* remove any double slashes */
804 str = talloc_all_string_sub(ctx, s, "//","/");
805 if (!str) {
806 return NULL;
807 }
808
809 /* Remove leading ./ characters */
810 if(strncmp(str, "./", 2) == 0) {
811 trim_string(str, "./", NULL);
812 if(*str == 0) {
813 str = talloc_strdup(ctx, "./");
814 if (!str) {
815 return NULL;
816 }
817 }
818 }
819
820 while ((p = strstr_m(str,"/../")) != NULL) {
821 char *s1;
822
823 *p = 0;
824 s1 = p+3;
825
826 if ((p=strrchr_m(str,'/')) != NULL) {
827 *p = 0;
828 } else {
829 *str = 0;
830 }
831 str = talloc_asprintf(ctx,
832 "%s%s",
833 str,
834 s1);
835 if (!str) {
836 return NULL;
837 }
838 }
839
840 trim_string(str,NULL,"/..");
841 return talloc_all_string_sub(ctx, str, "/./", "/");
842 }
843
844 char *clean_name(TALLOC_CTX *ctx, const char *s)
845 {
846 char *str = dos_clean_name(ctx, s);
847 if (!str) {
848 return NULL;
849 }
850 return unix_clean_name(ctx, str);
851 }
852
853 /*******************************************************************
854 Close the low 3 fd's and open dev/null in their place.
855 ********************************************************************/
856
857 void close_low_fds(bool stderr_too)
858 {
859 #ifndef VALGRIND
860 int fd;
861 int i;
862
863 close(0);
864 close(1);
865
866 if (stderr_too)
867 close(2);
868
869 /* try and use up these file descriptors, so silly
870 library routines writing to stdout etc won't cause havoc */
871 for (i=0;i<3;i++) {
872 if (i == 2 && !stderr_too)
873 continue;
874
875 fd = sys_open("/dev/null",O_RDWR,0);
876 if (fd < 0)
877 fd = sys_open("/dev/null",O_WRONLY,0);
878 if (fd < 0) {
879 DEBUG(0,("Can't open /dev/null\n"));
880 return;
881 }
882 if (fd != i) {
883 DEBUG(0,("Didn't get file descriptor %d\n",i));
884 return;
885 }
886 }
887 #endif
888 }
889
890 /*******************************************************************
891 Write data into an fd at a given offset. Ignore seek errors.
892 ********************************************************************/
893
894 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
895 {
896 size_t total=0;
897 ssize_t ret;
898
899 if (pos == (SMB_OFF_T)-1) {
900 return write_data(fd, buffer, N);
901 }
902 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
903 while (total < N) {
904 ret = sys_pwrite(fd,buffer + total,N - total, pos);
905 if (ret == -1 && errno == ESPIPE) {
906 return write_data(fd, buffer + total,N - total);
907 }
908 if (ret == -1) {
909 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
910 return -1;
911 }
912 if (ret == 0) {
913 return total;
914 }
915 total += ret;
916 pos += ret;
917 }
918 return (ssize_t)total;
919 #else
920 /* Use lseek and write_data. */
921 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
922 if (errno != ESPIPE) {
923 return -1;
924 }
925 }
926 return write_data(fd, buffer, N);
927 #endif
928 }
929
930 /****************************************************************************
931 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
932 else
933 if SYSV use O_NDELAY
934 if BSD use FNDELAY
935 ****************************************************************************/
936
937 int set_blocking(int fd, bool set)
938 {
939 int val;
940 #ifdef O_NONBLOCK
941 #define FLAG_TO_SET O_NONBLOCK
942 #else
943 #ifdef SYSV
944 #define FLAG_TO_SET O_NDELAY
945 #else /* BSD */
946 #define FLAG_TO_SET FNDELAY
947 #endif
948 #endif
949
950 if((val = sys_fcntl_long(fd, F_GETFL, 0)) == -1)
951 return -1;
952 if(set) /* Turn blocking on - ie. clear nonblock flag */
953 val &= ~FLAG_TO_SET;
954 else
955 val |= FLAG_TO_SET;
956 return sys_fcntl_long( fd, F_SETFL, val);
957 #undef FLAG_TO_SET
958 }
959
960 /*******************************************************************
961 Sleep for a specified number of milliseconds.
962 ********************************************************************/
963
964 void smb_msleep(unsigned int t)
965 {
966 #if defined(HAVE_NANOSLEEP)
967 struct timespec tval;
968 int ret;
969
970 tval.tv_sec = t/1000;
971 tval.tv_nsec = 1000000*(t%1000);
972
973 do {
974 errno = 0;
975 ret = nanosleep(&tval, &tval);
976 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
977 #else
978 unsigned int tdiff=0;
979 struct timeval tval,t1,t2;
980 fd_set fds;
981
982 GetTimeOfDay(&t1);
983 t2 = t1;
984
985 while (tdiff < t) {
986 tval.tv_sec = (t-tdiff)/1000;
987 tval.tv_usec = 1000*((t-tdiff)%1000);
988
989 /* Never wait for more than 1 sec. */
990 if (tval.tv_sec > 1) {
991 tval.tv_sec = 1;
992 tval.tv_usec = 0;
993 }
994
995 FD_ZERO(&fds);
996 errno = 0;
997 sys_select_intr(0,&fds,NULL,NULL,&tval);
998
999 GetTimeOfDay(&t2);
1000 if (t2.tv_sec < t1.tv_sec) {
1001 /* Someone adjusted time... */
1002 t1 = t2;
1003 }
1004
1005 tdiff = TvalDiff(&t1,&t2);
1006 }
1007 #endif
1008 }
1009
1010 /****************************************************************************
1011 Become a daemon, discarding the controlling terminal.
1012 ****************************************************************************/
1013
1014 void become_daemon(bool Fork, bool no_process_group)
1015 {
1016 if (Fork) {
1017 if (sys_fork()) {
1018 _exit(0);
1019 }
1020 }
1021
1022 /* detach from the terminal */
1023 #ifdef HAVE_SETSID
1024 if (!no_process_group) setsid();
1025 #elif defined(TIOCNOTTY)
1026 if (!no_process_group) {
1027 int i = sys_open("/dev/tty", O_RDWR, 0);
1028 if (i != -1) {
1029 ioctl(i, (int) TIOCNOTTY, (char *)0);
1030 close(i);
1031 }
1032 }
1033 #endif /* HAVE_SETSID */
1034
1035 /* Close fd's 0,1,2. Needed if started by rsh */
1036 close_low_fds(False); /* Don't close stderr, let the debug system
1037 attach it to the logfile */
1038 }
1039
1040 bool reinit_after_fork(struct messaging_context *msg_ctx,
1041 bool parent_longlived)
1042 {
1043 NTSTATUS status;
1044
1045 /* Reset the state of the random
1046 * number generation system, so
1047 * children do not get the same random
1048 * numbers as each other */
1049 set_need_random_reseed();
1050
1051 /* tdb needs special fork handling */
1052 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
1053 DEBUG(0,("tdb_reopen_all failed.\n"));
1054 return false;
1055 }
1056
1057 /*
1058 * For clustering, we need to re-init our ctdbd connection after the
1059 * fork
1060 */
1061 status = messaging_reinit(msg_ctx);
1062 if (!NT_STATUS_IS_OK(status)) {
1063 DEBUG(0,("messaging_reinit() failed: %s\n",
1064 nt_errstr(status)));
1065 return false;
1066 }
1067
1068 return true;
1069 }
1070
1071 /****************************************************************************
1072 Put up a yes/no prompt.
1073 ****************************************************************************/
1074
1075 bool yesno(const char *p)
1076 {
1077 char ans[20];
1078 printf("%s",p);
1079
1080 if (!fgets(ans,sizeof(ans)-1,stdin))
1081 return(False);
1082
1083 if (*ans == 'y' || *ans == 'Y')
1084 return(True);
1085
1086 return(False);
1087 }
1088
1089 #if defined(PARANOID_MALLOC_CHECKER)
1090
1091 /****************************************************************************
1092 Internal malloc wrapper. Externally visible.
1093 ****************************************************************************/
1094
1095 void *malloc_(size_t size)
1096 {
1097 if (size == 0) {
1098 return NULL;
1099 }
1100 #undef malloc
1101 return malloc(size);
1102 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
1103 }
1104
1105 /****************************************************************************
1106 Internal calloc wrapper. Not externally visible.
1107 ****************************************************************************/
1108
1109 static void *calloc_(size_t count, size_t size)
1110 {
1111 if (size == 0 || count == 0) {
1112 return NULL;
1113 }
1114 #undef calloc
1115 return calloc(count, size);
1116 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
1117 }
1118
1119 /****************************************************************************
1120 Internal realloc wrapper. Not externally visible.
1121 ****************************************************************************/
1122
1123 static void *realloc_(void *ptr, size_t size)
1124 {
1125 #undef realloc
1126 return realloc(ptr, size);
1127 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
1128 }
1129
1130 #endif /* PARANOID_MALLOC_CHECKER */
1131
1132 /****************************************************************************
1133 Type-safe malloc.
1134 ****************************************************************************/
1135
1136 void *malloc_array(size_t el_size, unsigned int count)
1137 {
1138 if (count >= MAX_ALLOC_SIZE/el_size) {
1139 return NULL;
1140 }
1141
1142 if (el_size == 0 || count == 0) {
1143 return NULL;
1144 }
1145 #if defined(PARANOID_MALLOC_CHECKER)
1146 return malloc_(el_size*count);
1147 #else
1148 return malloc(el_size*count);
1149 #endif
1150 }
1151
1152 /****************************************************************************
1153 Type-safe memalign
1154 ****************************************************************************/
1155
1156 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1157 {
1158 if (count >= MAX_ALLOC_SIZE/el_size) {
1159 return NULL;
1160 }
1161
1162 return sys_memalign(align, el_size*count);
1163 }
1164
1165 /****************************************************************************
1166 Type-safe calloc.
1167 ****************************************************************************/
1168
1169 void *calloc_array(size_t size, size_t nmemb)
1170 {
1171 if (nmemb >= MAX_ALLOC_SIZE/size) {
1172 return NULL;
1173 }
1174 if (size == 0 || nmemb == 0) {
1175 return NULL;
1176 }
1177 #if defined(PARANOID_MALLOC_CHECKER)
1178 return calloc_(nmemb, size);
1179 #else
1180 return calloc(nmemb, size);
1181 #endif
1182 }
1183
1184 /****************************************************************************
1185 Expand a pointer to be a particular size.
1186 Note that this version of Realloc has an extra parameter that decides
1187 whether to free the passed in storage on allocation failure or if the
1188 new size is zero.
1189
1190 This is designed for use in the typical idiom of :
1191
1192 p = SMB_REALLOC(p, size)
1193 if (!p) {
1194 return error;
1195 }
1196
1197 and not to have to keep track of the old 'p' contents to free later, nor
1198 to worry if the size parameter was zero. In the case where NULL is returned
1199 we guarentee that p has been freed.
1200
1201 If free later semantics are desired, then pass 'free_old_on_error' as False which
1202 guarentees that the old contents are not freed on error, even if size == 0. To use
1203 this idiom use :
1204
1205 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1206 if (!tmp) {
1207 SAFE_FREE(p);
1208 return error;
1209 } else {
1210 p = tmp;
1211 }
1212
1213 Changes were instigated by Coverity error checking. JRA.
1214 ****************************************************************************/
1215
1216 void *Realloc(void *p, size_t size, bool free_old_on_error)
1217 {
1218 void *ret=NULL;
1219
1220 if (size == 0) {
1221 if (free_old_on_error) {
1222 SAFE_FREE(p);
1223 }
1224 DEBUG(2,("Realloc asked for 0 bytes\n"));
1225 return NULL;
1226 }
1227
1228 #if defined(PARANOID_MALLOC_CHECKER)
1229 if (!p) {
1230 ret = (void *)malloc_(size);
1231 } else {
1232 ret = (void *)realloc_(p,size);
1233 }
1234 #else
1235 if (!p) {
1236 ret = (void *)malloc(size);
1237 } else {
1238 ret = (void *)realloc(p,size);
1239 }
1240 #endif
1241
1242 if (!ret) {
1243 if (free_old_on_error && p) {
1244 SAFE_FREE(p);
1245 }
1246 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1247 }
1248
1249 return(ret);
1250 }
1251
1252 /****************************************************************************
1253 Type-safe realloc.
1254 ****************************************************************************/
1255
1256 void *realloc_array(void *p, size_t el_size, unsigned int count, bool free_old_on_error)
1257 {
1258 if (count >= MAX_ALLOC_SIZE/el_size) {
1259 if (free_old_on_error) {
1260 SAFE_FREE(p);
1261 }
1262 return NULL;
1263 }
1264 return Realloc(p, el_size*count, free_old_on_error);
1265 }
1266
1267 /****************************************************************************
1268 (Hopefully) efficient array append.
1269 ****************************************************************************/
1270
1271 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1272 void *element, void *_array, uint32 *num_elements,
1273 ssize_t *array_size)
1274 {
1275 void **array = (void **)_array;
1276
1277 if (*array_size < 0) {
1278 return;
1279 }
1280
1281 if (*array == NULL) {
1282 if (*array_size == 0) {
1283 *array_size = 128;
1284 }
1285
1286 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1287 goto error;
1288 }
1289
1290 *array = TALLOC(mem_ctx, element_size * (*array_size));
1291 if (*array == NULL) {
1292 goto error;
1293 }
1294 }
1295
1296 if (*num_elements == *array_size) {
1297 *array_size *= 2;
1298
1299 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1300 goto error;
1301 }
1302
1303 *array = TALLOC_REALLOC(mem_ctx, *array,
1304 element_size * (*array_size));
1305
1306 if (*array == NULL) {
1307 goto error;
1308 }
1309 }
1310
1311 memcpy((char *)(*array) + element_size*(*num_elements),
1312 element, element_size);
1313 *num_elements += 1;
1314
1315 return;
1316
1317 error:
1318 *num_elements = 0;
1319 *array_size = -1;
1320 }
1321
1322 /****************************************************************************
1323 Free memory, checks for NULL.
1324 Use directly SAFE_FREE()
1325 Exists only because we need to pass a function pointer somewhere --SSS
1326 ****************************************************************************/
1327
1328 void safe_free(void *p)
1329 {
1330 SAFE_FREE(p);
1331 }
1332
1333 /****************************************************************************
1334 Get my own name and IP.
1335 ****************************************************************************/
1336
1337 char *get_myname(TALLOC_CTX *ctx)
1338 {
1339 char *p;
1340 char hostname[HOST_NAME_MAX];
1341
1342 *hostname = 0;
1343
1344 /* get my host name */
1345 if (gethostname(hostname, sizeof(hostname)) == -1) {
1346 DEBUG(0,("gethostname failed\n"));
1347 return False;
1348 }
1349
1350 /* Ensure null termination. */
1351 hostname[sizeof(hostname)-1] = '\0';
1352
1353 /* split off any parts after an initial . */
1354 p = strchr_m(hostname,'.');
1355 if (p) {
1356 *p = 0;
1357 }
1358
1359 return talloc_strdup(ctx, hostname);
1360 }
1361
1362 /****************************************************************************
1363 Get my own domain name, or "" if we have none.
1364 ****************************************************************************/
1365
1366 char *get_mydnsdomname(TALLOC_CTX *ctx)
1367 {
1368 const char *domname;
1369 char *p;
1370
1371 domname = get_mydnsfullname();
1372 if (!domname) {
1373 return NULL;
1374 }
1375
1376 p = strchr_m(domname, '.');
1377 if (p) {
1378 p++;
1379 return talloc_strdup(ctx, p);
1380 } else {
1381 return talloc_strdup(ctx, "");
1382 }
1383 }
1384
1385 /****************************************************************************
1386 Interpret a protocol description string, with a default.
1387 ****************************************************************************/
1388
1389 int interpret_protocol(const char *str,int def)
1390 {
1391 if (strequal(str,"NT1"))
1392 return(PROTOCOL_NT1);
1393 if (strequal(str,"LANMAN2"))
1394 return(PROTOCOL_LANMAN2);
1395 if (strequal(str,"LANMAN1"))
1396 return(PROTOCOL_LANMAN1);
1397 if (strequal(str,"CORE"))
1398 return(PROTOCOL_CORE);
1399 if (strequal(str,"COREPLUS"))
1400 return(PROTOCOL_COREPLUS);
1401 if (strequal(str,"CORE+"))
1402 return(PROTOCOL_COREPLUS);
1403
1404 DEBUG(0,("Unrecognised protocol level %s\n",str));
1405
1406 return(def);
1407 }
1408
1409
1410 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1411 /******************************************************************
1412 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1413 Based on a fix from <Thomas.Hepper@icem.de>.
1414 Returns a malloc'ed string.
1415 *******************************************************************/
1416
1417 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1418 {
1419 if (*str == '-') {
1420 const char *p = str;
1421 while(*p && !isspace(*p))
1422 p++;
1423 while(*p && isspace(*p))
1424 p++;
1425 if(*p) {
1426 return talloc_strdup(ctx, p);
1427 }
1428 }
1429 return NULL;
1430 }
1431
1432 /*******************************************************************
1433 Patch from jkf@soton.ac.uk
1434 Split Luke's automount_server into YP lookup and string splitter
1435 so can easily implement automount_path().
1436 Returns a malloc'ed string.
1437 *******************************************************************/
1438
1439 #ifdef WITH_NISPLUS_HOME
1440 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1441 {
1442 char *value = NULL;
1443
1444 char *nis_map = (char *)lp_nis_home_map_name();
1445
1446 char buffer[NIS_MAXATTRVAL + 1];
1447 nis_result *result;
1448 nis_object *object;
1449 entry_obj *entry;
1450
1451 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1452 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1453
1454 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1455 if (result->status != NIS_SUCCESS) {
1456 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1457 } else {
1458 object = result->objects.objects_val;
1459 if (object->zo_data.zo_type == ENTRY_OBJ) {
1460 entry = &object->zo_data.objdata_u.en_data;
1461 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1462 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1463
1464 value = talloc_strdup(ctx,
1465 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1466 if (!value) {
1467 nis_freeresult(result);
1468 return NULL;
1469 }
1470 value = talloc_string_sub(ctx,
1471 value,
1472 "&",
1473 user_name);
1474 }
1475 }
1476 }
1477 nis_freeresult(result);
1478
1479 if (value) {
1480 value = strip_mount_options(ctx, value);
1481 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1482 user_name, value));
1483 }
1484 return value;
1485 }
1486 #else /* WITH_NISPLUS_HOME */
1487
1488 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1489 {
1490 char *value = NULL;
1491
1492 int nis_error; /* returned by yp all functions */
1493 char *nis_result; /* yp_match inits this */
1494 int nis_result_len; /* and set this */
1495 char *nis_domain; /* yp_get_default_domain inits this */
1496 char *nis_map = (char *)lp_nis_home_map_name();
1497
1498 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1499 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1500 return NULL;
1501 }
1502
1503 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1504
1505 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1506 strlen(user_name), &nis_result,
1507 &nis_result_len)) == 0) {
1508 value = talloc_strdup(ctx, nis_result);
1509 if (!value) {
1510 return NULL;
1511 }
1512 value = strip_mount_options(ctx, value);
1513 } else if(nis_error == YPERR_KEY) {
1514 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1515 user_name, nis_map));
1516 DEBUG(3, ("using defaults for server and home directory\n"));
1517 } else {
1518 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1519 yperr_string(nis_error), user_name, nis_map));
1520 }
1521
1522 if (value) {
1523 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1524 }
1525 return value;
1526 }
1527 #endif /* WITH_NISPLUS_HOME */
1528 #endif
1529
1530 /****************************************************************************
1531 Check if a process exists. Does this work on all unixes?
1532 ****************************************************************************/
1533
1534 bool process_exists(const struct server_id pid)
1535 {
1536 if (procid_is_me(&pid)) {
1537 return True;
1538 }
1539
1540 if (procid_is_local(&pid)) {
1541 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1542 }
1543
1544 #ifdef CLUSTER_SUPPORT
1545 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1546 pid.pid);
1547 #else
1548 return False;
1549 #endif
1550 }
1551
1552 bool process_exists_by_pid(pid_t pid)
1553 {
1554 /* Doing kill with a non-positive pid causes messages to be
1555 * sent to places we don't want. */
1556 SMB_ASSERT(pid > 0);
1557 return(kill(pid,0) == 0 || errno != ESRCH);
1558 }
1559
1560 /*******************************************************************
1561 Convert a uid into a user name.
1562 ********************************************************************/
1563
1564 const char *uidtoname(uid_t uid)
1565 {
1566 TALLOC_CTX *ctx = talloc_tos();
1567 char *name = NULL;
1568 struct passwd *pass = NULL;
1569
1570 pass = getpwuid_alloc(ctx,uid);
1571 if (pass) {
1572 name = talloc_strdup(ctx,pass->pw_name);
1573 TALLOC_FREE(pass);
1574 } else {
1575 name = talloc_asprintf(ctx,
1576 "%ld",
1577 (long int)uid);
1578 }
1579 return name;
1580 }
1581
1582 /*******************************************************************
1583 Convert a gid into a group name.
1584 ********************************************************************/
1585
1586 char *gidtoname(gid_t gid)
1587 {
1588 struct group *grp;
1589
1590 grp = getgrgid(gid);
1591 if (grp) {
1592 return talloc_strdup(talloc_tos(), grp->gr_name);
1593 }
1594 else {
1595 return talloc_asprintf(talloc_tos(),
1596 "%d",
1597 (int)gid);
1598 }
1599 }
1600
1601 /*******************************************************************
1602 Convert a user name into a uid.
1603 ********************************************************************/
1604
1605 uid_t nametouid(const char *name)
1606 {
1607 struct passwd *pass;
1608 char *p;
1609 uid_t u;
1610
1611 pass = getpwnam_alloc(talloc_autofree_context(), name);
1612 if (pass) {
1613 u = pass->pw_uid;
1614 TALLOC_FREE(pass);
1615 return u;
1616 }
1617
1618 u = (uid_t)strtol(name, &p, 0);
1619 if ((p != name) && (*p == '\0'))
1620 return u;
1621
1622 return (uid_t)-1;
1623 }
1624
1625 /*******************************************************************
1626 Convert a name to a gid_t if possible. Return -1 if not a group.
1627 ********************************************************************/
1628
1629 gid_t nametogid(const char *name)
1630 {
1631 struct group *grp;
1632 char *p;
1633 gid_t g;
1634
1635 g = (gid_t)strtol(name, &p, 0);
1636 if ((p != name) && (*p == '\0'))
1637 return g;
1638
1639 grp = sys_getgrnam(name);
1640 if (grp)
1641 return(grp->gr_gid);
1642 return (gid_t)-1;
1643 }
1644
1645 /*******************************************************************
1646 Something really nasty happened - panic !
1647 ********************************************************************/
1648
1649 void smb_panic(const char *const why)
1650 {
1651 char *cmd;
1652 int result;
1653
1654 #ifdef DEVELOPER
1655 {
1656
1657 if (global_clobber_region_function) {
1658 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1659 global_clobber_region_function,
1660 global_clobber_region_line));
1661 }
1662 }
1663 #endif
1664
1665 DEBUG(0,("PANIC (pid %llu): %s\n",
1666 (unsigned long long)sys_getpid(), why));
1667 log_stack_trace();
1668
1669 cmd = lp_panic_action();
1670 if (cmd && *cmd) {
1671 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1672 result = system(cmd);
1673
1674 if (result == -1)
1675 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1676 strerror(errno)));
1677 else
1678 DEBUG(0, ("smb_panic(): action returned status %d\n",
1679 WEXITSTATUS(result)));
1680 }
1681
1682 dump_core();
1683 }
1684
1685 /*******************************************************************
1686 Print a backtrace of the stack to the debug log. This function
1687 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1688 exit shortly after calling it.
1689 ********************************************************************/
1690
1691 #ifdef HAVE_LIBUNWIND_H
1692 #include <libunwind.h>
1693 #endif
1694
1695 #ifdef HAVE_EXECINFO_H
1696 #include <execinfo.h>
1697 #endif
1698
1699 #ifdef HAVE_LIBEXC_H
1700 #include <libexc.h>
1701 #endif
1702
1703 void log_stack_trace(void)
1704 {
1705 #ifdef HAVE_LIBUNWIND
1706 /* Try to use libunwind before any other technique since on ia64
1707 * libunwind correctly walks the stack in more circumstances than
1708 * backtrace.
1709 */
1710 unw_cursor_t cursor;
1711 unw_context_t uc;
1712 unsigned i = 0;
1713
1714 char procname[256];
1715 unw_word_t ip, sp, off;
1716
1717 procname[sizeof(procname) - 1] = '\0';
1718
1719 if (unw_getcontext(&uc) != 0) {
1720 goto libunwind_failed;
1721 }
1722
1723 if (unw_init_local(&cursor, &uc) != 0) {
1724 goto libunwind_failed;
1725 }
1726
1727 DEBUG(0, ("BACKTRACE:\n"));
1728
1729 do {
1730 ip = sp = 0;
1731 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1732 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1733
1734 switch (unw_get_proc_name(&cursor,
1735 procname, sizeof(procname) - 1, &off) ) {
1736 case 0:
1737 /* Name found. */
1738 case -UNW_ENOMEM:
1739 /* Name truncated. */
1740 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1741 i, procname, (long long)off,
1742 (long long)ip, (long long) sp));
1743 break;
1744 default:
1745 /* case -UNW_ENOINFO: */
1746 /* case -UNW_EUNSPEC: */
1747 /* No symbol name found. */
1748 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1749 i, "<unknown symbol>",
1750 (long long)ip, (long long) sp));
1751 }
1752 ++i;
1753 } while (unw_step(&cursor) > 0);
1754
1755 return;
1756
1757 libunwind_failed:
1758 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1759
1760 #elif HAVE_BACKTRACE_SYMBOLS
1761 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1762 size_t backtrace_size;
1763 char **backtrace_strings;
1764
1765 /* get the backtrace (stack frames) */
1766 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1767 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1768
1769 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1770 (unsigned long)backtrace_size));
1771
1772 if (backtrace_strings) {
1773 int i;
1774
1775 for (i = 0; i < backtrace_size; i++)
1776 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1777
1778 /* Leak the backtrace_strings, rather than risk what free() might do */
1779 }
1780
1781 #elif HAVE_LIBEXC
1782
1783 /* The IRIX libexc library provides an API for unwinding the stack. See
1784 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1785 * since we are about to abort anyway, it hardly matters.
1786 */
1787
1788 #define NAMESIZE 32 /* Arbitrary */
1789
1790 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1791 char * names[BACKTRACE_STACK_SIZE];
1792 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1793
1794 int i;
1795 int levels;
1796
1797 ZERO_ARRAY(addrs);
1798 ZERO_ARRAY(names);
1799 ZERO_ARRAY(namebuf);
1800
1801 /* We need to be root so we can open our /proc entry to walk
1802 * our stack. It also helps when we want to dump core.
1803 */
1804 become_root();
1805
1806 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1807 names[i] = namebuf + (i * NAMESIZE);
1808 }
1809
1810 levels = trace_back_stack(0, addrs, names,
1811 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1812
1813 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1814 for (i = 0; i < levels; i++) {
1815 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1816 }
1817 #undef NAMESIZE
1818
1819 #else
1820 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1821 #endif
1822 }
1823
1824 /*******************************************************************
1825 A readdir wrapper which just returns the file name.
1826 ********************************************************************/
1827
1828 const char *readdirname(SMB_STRUCT_DIR *p)
1829 {
1830 SMB_STRUCT_DIRENT *ptr;
1831 char *dname;
1832
1833 if (!p)
1834 return(NULL);
1835
1836 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1837 if (!ptr)
1838 return(NULL);
1839
1840 dname = ptr->d_name;
1841
1842 #ifdef NEXT2
1843 if (telldir(p) < 0)
1844 return(NULL);
1845 #endif
1846
1847 #ifdef HAVE_BROKEN_READDIR_NAME
1848 /* using /usr/ucb/cc is BAD */
1849 dname = dname - 2;
1850 #endif
1851
1852 return talloc_strdup(talloc_tos(), dname);
1853 }
1854
1855 /*******************************************************************
1856 Utility function used to decide if the last component
1857 of a path matches a (possibly wildcarded) entry in a namelist.
1858 ********************************************************************/
1859
1860 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1861 {
1862 const char *last_component;
1863
1864 /* if we have no list it's obviously not in the path */
1865 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1866 return False;
1867 }
1868
1869 DEBUG(8, ("is_in_path: %s\n", name));
1870
1871 /* Get the last component of the unix name. */
1872 last_component = strrchr_m(name, '/');
1873 if (!last_component) {
1874 last_component = name;
1875 } else {
1876 last_component++; /* Go past '/' */
1877 }
1878
1879 for(; namelist->name != NULL; namelist++) {
1880 if(namelist->is_wild) {
1881 if (mask_match(last_component, namelist->name, case_sensitive)) {
1882 DEBUG(8,("is_in_path: mask match succeeded\n"));
1883 return True;
1884 }
1885 } else {
1886 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1887 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1888 DEBUG(8,("is_in_path: match succeeded\n"));
1889 return True;
1890 }
1891 }
1892 }
1893 DEBUG(8,("is_in_path: match not found\n"));
1894 return False;
1895 }
1896
1897 /*******************************************************************
1898 Strip a '/' separated list into an array of
1899 name_compare_enties structures suitable for
1900 passing to is_in_path(). We do this for
1901 speed so we can pre-parse all the names in the list
1902 and don't do it for each call to is_in_path().
1903 namelist is modified here and is assumed to be
1904 a copy owned by the caller.
1905 We also check if the entry contains a wildcard to
1906 remove a potentially expensive call to mask_match
1907 if possible.
1908 ********************************************************************/
1909
1910 void set_namearray(name_compare_entry **ppname_array, const char *namelist)
1911 {
1912 char *name_end;
1913 const char *nameptr = namelist;
1914 int num_entries = 0;
1915 int i;
1916
1917 (*ppname_array) = NULL;
1918
1919 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1920 return;
1921
1922 /* We need to make two passes over the string. The
1923 first to count the number of elements, the second
1924 to split it.
1925 */
1926
1927 while(*nameptr) {
1928 if ( *nameptr == '/' ) {
1929 /* cope with multiple (useless) /s) */
1930 nameptr++;
1931 continue;
1932 }
1933 /* find the next / */
1934 name_end = strchr_m(nameptr, '/');
1935
1936 /* oops - the last check for a / didn't find one. */
1937 if (name_end == NULL)
1938 break;
1939
1940 /* next segment please */
1941 nameptr = name_end + 1;
1942 num_entries++;
1943 }
1944
1945 if(num_entries == 0)
1946 return;
1947
1948 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1949 DEBUG(0,("set_namearray: malloc fail\n"));
1950 return;
1951 }
1952
1953 /* Now copy out the names */
1954 nameptr = namelist;
1955 i = 0;
1956 while(*nameptr) {
1957 if ( *nameptr == '/' ) {
1958 /* cope with multiple (useless) /s) */
1959 nameptr++;
1960 continue;
1961 }
1962 /* find the next / */
1963 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1964 *name_end = 0;
1965
1966 /* oops - the last check for a / didn't find one. */
1967 if(name_end == NULL)
1968 break;
1969
1970 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1971 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1972 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1973 return;
1974 }
1975
1976 /* next segment please */
1977 nameptr = name_end + 1;
1978 i++;
1979 }
1980
1981 (*ppname_array)[i].name = NULL;
1982
1983 return;
1984 }
1985
1986 /****************************************************************************
1987 Routine to free a namearray.
1988 ****************************************************************************/
1989
1990 void free_namearray(name_compare_entry *name_array)
1991 {
1992 int i;
1993
1994 if(name_array == NULL)
1995 return;
1996
1997 for(i=0; name_array[i].name!=NULL; i++)
1998 SAFE_FREE(name_array[i].name);
1999 SAFE_FREE(name_array);
2000 }
2001
2002 #undef DBGC_CLASS
2003 #define DBGC_CLASS DBGC_LOCKING
2004
2005 /****************************************************************************
2006 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
2007 is dealt with in posix.c
2008 Returns True if the lock was granted, False otherwise.
2009 ****************************************************************************/
2010
2011 bool fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
2012 {
2013 SMB_STRUCT_FLOCK lock;
2014 int ret;
2015
2016 DEBUG(8,("fcntl_lock fd=%d op=%d offset=%.0f count=%.0f type=%d\n",
2017 fd,op,(double)offset,(double)count,type));
2018
2019 lock.l_type = type;
2020 lock.l_whence = SEEK_SET;
2021 lock.l_start = offset;
2022 lock.l_len = count;
2023 lock.l_pid = 0;
2024
2025 ret = sys_fcntl_ptr(fd,op,&lock);
2026
2027 if (ret == -1) {
2028 int sav = errno;
2029 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
2030 (double)offset,(double)count,op,type,strerror(errno)));
2031 errno = sav;
2032 return False;
2033 }
2034
2035 /* everything went OK */
2036 DEBUG(8,("fcntl_lock: Lock call successful\n"));
2037
2038 return True;
2039 }
2040
2041 /****************************************************************************
2042 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
2043 is dealt with in posix.c
2044 Returns True if we have information regarding this lock region (and returns
2045 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
2046 ****************************************************************************/
2047
2048 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
2049 {
2050 SMB_STRUCT_FLOCK lock;
2051 int ret;
2052
2053 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
2054 fd,(double)*poffset,(double)*pcount,*ptype));
2055
2056 lock.l_type = *ptype;
2057 lock.l_whence = SEEK_SET;
2058 lock.l_start = *poffset;
2059 lock.l_len = *pcount;
2060 lock.l_pid = 0;
2061
2062 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
2063
2064 if (ret == -1) {
2065 int sav = errno;
2066 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
2067 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
2068 errno = sav;
2069 return False;
2070 }
2071
2072 *ptype = lock.l_type;
2073 *poffset = lock.l_start;
2074 *pcount = lock.l_len;
2075 *ppid = lock.l_pid;
2076
2077 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
2078 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
2079 return True;
2080 }
2081
2082 #undef DBGC_CLASS
2083 #define DBGC_CLASS DBGC_ALL
2084
2085 /*******************************************************************
2086 Is the name specified one of my netbios names.
2087 Returns true if it is equal, false otherwise.
2088 ********************************************************************/
2089
2090 bool is_myname(const char *s)
2091 {
2092 int n;
2093 bool ret = False;
2094
2095 for (n=0; my_netbios_names(n); n++) {
2096 if (strequal(my_netbios_names(n), s)) {
2097 ret=True;
2098 break;
2099 }
2100 }
2101 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
2102 return(ret);
2103 }
2104
2105 /*******************************************************************
2106 Is the name specified our workgroup/domain.
2107 Returns true if it is equal, false otherwise.
2108 ********************************************************************/
2109
2110 bool is_myworkgroup(const char *s)
2111 {
2112 bool ret = False;
2113
2114 if (strequal(s, lp_workgroup())) {
2115 ret=True;
2116 }
2117
2118 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
2119 return(ret);
2120 }
2121
2122 /*******************************************************************
2123 we distinguish between 2K and XP by the "Native Lan Manager" string
2124 WinXP => "Windows 2002 5.1"
2125 WinXP 64bit => "Windows XP 5.2"
2126 Win2k => "Windows 2000 5.0"
2127 NT4 => "Windows NT 4.0"
2128 Win9x => "Windows 4.0"
2129 Windows 2003 doesn't set the native lan manager string but
2130 they do set the domain to "Windows 2003 5.2" (probably a bug).
2131 ********************************************************************/
2132
2133 void ra_lanman_string( const char *native_lanman )
2134 {
2135 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
2136 set_remote_arch( RA_WINXP );
2137 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
2138 set_remote_arch( RA_WINXP64 );
2139 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
2140 set_remote_arch( RA_WIN2K3 );
2141 }
2142
2143 static const char *remote_arch_str;
2144
2145 const char *get_remote_arch_str(void)
2146 {
2147 if (!remote_arch_str) {
2148 return "UNKNOWN";
2149 }
2150 return remote_arch_str;
2151 }
2152
2153 /*******************************************************************
2154 Set the horrid remote_arch string based on an enum.
2155 ********************************************************************/
2156
2157 void set_remote_arch(enum remote_arch_types type)
2158 {
2159 ra_type = type;
2160 switch( type ) {
2161 case RA_WFWG:
2162 remote_arch_str = "WfWg";
2163 break;
2164 case RA_OS2:
2165 remote_arch_str = "OS2";
2166 break;
2167 case RA_WIN95:
2168 remote_arch_str = "Win95";
2169 break;
2170 case RA_WINNT:
2171 remote_arch_str = "WinNT";
2172 break;
2173 case RA_WIN2K:
2174 remote_arch_str = "Win2K";
2175 break;
2176 case RA_WINXP:
2177 remote_arch_str = "WinXP";
2178 break;
2179 case RA_WINXP64:
2180 remote_arch_str = "WinXP64";
2181 break;
2182 case RA_WIN2K3:
2183 remote_arch_str = "Win2K3";
2184 break;
2185 case RA_VISTA:
2186 remote_arch_str = "Vista";
2187 break;
2188 case RA_SAMBA:
2189 remote_arch_str = "Samba";
2190 break;
2191 case RA_CIFSFS:
2192 remote_arch_str = "CIFSFS";
2193 break;
2194 default:
2195 ra_type = RA_UNKNOWN;
2196 remote_arch_str = "UNKNOWN";
2197 break;
2198 }
2199
2200 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
2201 remote_arch_str));
2202 }
2203
2204 /*******************************************************************
2205 Get the remote_arch type.
2206 ********************************************************************/
2207
2208 enum remote_arch_types get_remote_arch(void)
2209 {
2210 return ra_type;
2211 }
2212
2213 void print_asc(int level, const unsigned char *buf,int len)
2214 {
2215 int i;
2216 for (i=0;i<len;i++)
2217 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
2218 }
2219
2220 void dump_data(int level, const unsigned char *buf1,int len)
2221 {
2222 const unsigned char *buf = (const unsigned char *)buf1;
2223 int i=0;
2224 if (len<=0) return;
2225
2226 if (!DEBUGLVL(level)) return;
2227
2228 DEBUGADD(level,("[%03X] ",i));
2229 for (i=0;i<len;) {
2230 DEBUGADD(level,("%02X ",(int)buf[i]));
2231 i++;
2232 if (i%8 == 0) DEBUGADD(level,(" "));
2233 if (i%16 == 0) {
2234 print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
2235 print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
2236 if (i<len) DEBUGADD(level,("[%03X] ",i));
2237 }
2238 }
2239 if (i%16) {
2240 int n;
2241 n = 16 - (i%16);
2242 DEBUGADD(level,(" "));
2243 if (n>8) DEBUGADD(level,(" "));
2244 while (n--) DEBUGADD(level,(" "));
2245 n = MIN(8,i%16);
2246 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2247 n = (i%16) - n;
2248 if (n>0) print_asc(level,&buf[i-n],n);
2249 DEBUGADD(level,("\n"));
2250 }
2251 }
2252
2253 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2254 {
2255 #ifdef DEBUG_PASSWORD
2256 DEBUG(11, ("%s", msg));
2257 if (data != NULL && len > 0)
2258 {
2259 dump_data(11, data, len);
2260 }
2261 #endif
2262 }
2263
2264 const char *tab_depth(int level, int depth)
2265 {
2266 if( CHECK_DEBUGLVL(level) ) {
2267 dbgtext("%*s", depth*4, "");
2268 }
2269 return "";
2270 }
2271
2272 /*****************************************************************************
2273 Provide a checksum on a string
2274
2275 Input: s - the null-terminated character string for which the checksum
2276 will be calculated.
2277
2278 Output: The checksum value calculated for s.
2279 *****************************************************************************/
2280
2281 int str_checksum(const char *s)
2282 {
2283 int res = 0;
2284 int c;
2285 int i=0;
2286
2287 while(*s) {
2288 c = *s;
2289 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2290 s++;
2291 i++;
2292 }
2293 return(res);
2294 }
2295
2296 /*****************************************************************
2297 Zero a memory area then free it. Used to catch bugs faster.
2298 *****************************************************************/
2299
2300 void zero_free(void *p, size_t size)
2301 {
2302 memset(p, 0, size);
2303 SAFE_FREE(p);
2304 }
2305
2306 /*****************************************************************
2307 Set our open file limit to a requested max and return the limit.
2308 *****************************************************************/
2309
2310 int set_maxfiles(int requested_max)
2311 {
2312 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2313 struct rlimit rlp;
2314 int saved_current_limit;
2315
2316 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2317 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2318 strerror(errno) ));
2319 /* just guess... */
2320 return requested_max;
2321 }
2322
2323 /*
2324 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2325 * account for the extra fd we need
2326 * as well as the log files and standard
2327 * handles etc. Save the limit we want to set in case
2328 * we are running on an OS that doesn't support this limit (AIX)
2329 * which always returns RLIM_INFINITY for rlp.rlim_max.
2330 */
2331
2332 /* Try raising the hard (max) limit to the requested amount. */
2333
2334 #if defined(RLIM_INFINITY)
2335 if (rlp.rlim_max != RLIM_INFINITY) {
2336 int orig_max = rlp.rlim_max;
2337
2338 if ( rlp.rlim_max < requested_max )
2339 rlp.rlim_max = requested_max;
2340
2341 /* This failing is not an error - many systems (Linux) don't
2342 support our default request of 10,000 open files. JRA. */
2343
2344 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2345 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2346 (int)rlp.rlim_max, strerror(errno) ));
2347
2348 /* Set failed - restore original value from get. */
2349 rlp.rlim_max = orig_max;
2350 }
2351 }
2352 #endif
2353
2354 /* Now try setting the soft (current) limit. */
2355
2356 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2357
2358 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2359 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2360 (int)rlp.rlim_cur, strerror(errno) ));
2361 /* just guess... */
2362 return saved_current_limit;
2363 }
2364
2365 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2366 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2367 strerror(errno) ));
2368 /* just guess... */
2369 return saved_current_limit;
2370 }
2371
2372 #if defined(RLIM_INFINITY)
2373 if(rlp.rlim_cur == RLIM_INFINITY)
2374 return saved_current_limit;
2375 #endif
2376
2377 if((int)rlp.rlim_cur > saved_current_limit)
2378 return saved_current_limit;
2379
2380 return rlp.rlim_cur;
2381 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2382 /*
2383 * No way to know - just guess...
2384 */
2385 return requested_max;
2386 #endif
2387 }
2388
2389 /*****************************************************************
2390 Possibly replace mkstemp if it is broken.
2391 *****************************************************************/
2392
2393 int smb_mkstemp(char *name_template)
2394 {
2395 #if HAVE_SECURE_MKSTEMP
2396 return mkstemp(name_template);
2397 #else
2398 /* have a reasonable go at emulating it. Hope that
2399 the system mktemp() isn't completly hopeless */
2400 char *p = mktemp(name_template);
2401 if (!p)
2402 return -1;
2403 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2404 #endif
2405 }
2406
2407 /*****************************************************************
2408 malloc that aborts with smb_panic on fail or zero size.
2409 *****************************************************************/
2410
2411 void *smb_xmalloc_array(size_t size, unsigned int count)
2412 {
2413 void *p;
2414 if (size == 0) {
2415 smb_panic("smb_xmalloc_array: called with zero size");
2416 }
2417 if (count >= MAX_ALLOC_SIZE/size) {
2418 smb_panic("smb_xmalloc_array: alloc size too large");
2419 }
2420 if ((p = SMB_MALLOC(size*count)) == NULL) {
2421 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2422 (unsigned long)size, (unsigned long)count));
2423 smb_panic("smb_xmalloc_array: malloc failed");
2424 }
2425 return p;
2426 }
2427
2428 /**
2429 Memdup with smb_panic on fail.
2430 **/
2431
2432 void *smb_xmemdup(const void *p, size_t size)
2433 {
2434 void *p2;
2435 p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2436 memcpy(p2, p, size);
2437 return p2;
2438 }
2439
2440 /**
2441 strdup that aborts on malloc fail.
2442 **/
2443
2444 char *smb_xstrdup(const char *s)
2445 {
2446 #if defined(PARANOID_MALLOC_CHECKER)
2447 #ifdef strdup
2448 #undef strdup
2449 #endif
2450 #endif
2451
2452 #ifndef HAVE_STRDUP
2453 #define strdup rep_strdup
2454 #endif
2455
2456 char *s1 = strdup(s);
2457 #if defined(PARANOID_MALLOC_CHECKER)
2458 #ifdef strdup
2459 #undef strdup
2460 #endif
2461 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2462 #endif
2463 if (!s1) {
2464 smb_panic("smb_xstrdup: malloc failed");
2465 }
2466 return s1;
2467
2468 }
2469
2470 /**
2471 strndup that aborts on malloc fail.
2472 **/
2473
2474 char *smb_xstrndup(const char *s, size_t n)
2475 {
2476 #if defined(PARANOID_MALLOC_CHECKER)
2477 #ifdef strndup
2478 #undef strndup
2479 #endif
2480 #endif
2481
2482 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
2483 #undef HAVE_STRNDUP
2484 #define strndup rep_strndup
2485 #endif
2486
2487 char *s1 = strndup(s, n);
2488 #if defined(PARANOID_MALLOC_CHECKER)
2489 #ifdef strndup
2490 #undef strndup
2491 #endif
2492 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2493 #endif
2494 if (!s1) {
2495 smb_panic("smb_xstrndup: malloc failed");
2496 }
2497 return s1;
2498 }
2499
2500 /*
2501 vasprintf that aborts on malloc fail
2502 */
2503
2504 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2505 {
2506 int n;
2507 va_list ap2;
2508
2509 VA_COPY(ap2, ap);
2510
2511 n = vasprintf(ptr, format, ap2);
2512 if (n == -1 || ! *ptr) {
2513 smb_panic("smb_xvasprintf: out of memory");
2514 }
2515 va_end(ap2);
2516 return n;
2517 }
2518
2519 /*****************************************************************
2520 Like strdup but for memory.
2521 *****************************************************************/
2522
2523 void *memdup(const void *p, size_t size)
2524 {
2525 void *p2;
2526 if (size == 0)
2527 return NULL;
2528 p2 = SMB_MALLOC(size);
2529 if (!p2)
2530 return NULL;
2531 memcpy(p2, p, size);
2532 return p2;
2533 }
2534
2535 /*****************************************************************
2536 Get local hostname and cache result.
2537 *****************************************************************/
2538
2539 char *myhostname(void)
2540 {
2541 static char *ret;
2542 if (ret == NULL) {
2543 /* This is cached forever so
2544 * use autofree talloc ctx. */
2545 ret = get_myname(talloc_autofree_context());
2546 }
2547 return ret;
2548 }
2549
2550 /*****************************************************************
2551 A useful function for returning a path in the Samba pid directory.
2552 *****************************************************************/
2553
2554 static char *xx_path(const char *name, const char *rootpath)
2555 {
2556 char *fname = NULL;
2557
2558 fname = talloc_strdup(talloc_tos(), rootpath);
2559 if (!fname) {
2560 return NULL;
2561 }
2562 trim_string(fname,"","/");
2563
2564 if (!directory_exist(fname,NULL)) {
2565 mkdir(fname,0755);
2566 }
2567
2568 return talloc_asprintf(talloc_tos(),
2569 "%s/%s",
2570 fname,
2571 name);
2572 }
2573
2574 /*****************************************************************
2575 A useful function for returning a path in the Samba lock directory.
2576 *****************************************************************/
2577
2578 char *lock_path(const char *name)
2579 {
2580 return xx_path(name, lp_lockdir());
2581 }
2582
2583 /*****************************************************************
2584 A useful function for returning a path in the Samba pid directory.
2585 *****************************************************************/
2586
2587 char *pid_path(const char *name)
2588 {
2589 return xx_path(name, lp_piddir());
2590 }
2591
2592 /**
2593 * @brief Returns an absolute path to a file in the Samba lib directory.
2594 *
2595 * @param name File to find, relative to LIBDIR.
2596 *
2597 * @retval Pointer to a string containing the full path.
2598 **/
2599
2600 char *lib_path(const char *name)
2601 {
2602 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2603 }
2604
2605 /**
2606 * @brief Returns an absolute path to a file in the Samba modules directory.
2607 *
2608 * @param name File to find, relative to MODULESDIR.
2609 *
2610 * @retval Pointer to a string containing the full path.
2611 **/
2612
2613 char *modules_path(const char *name)
2614 {
2615 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2616 }
2617
2618 /**
2619 * @brief Returns an absolute path to a file in the Samba data directory.
2620 *
2621 * @param name File to find, relative to CODEPAGEDIR.
2622 *
2623 * @retval Pointer to a talloc'ed string containing the full path.
2624 **/
2625
2626 char *data_path(const char *name)
2627 {
2628 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2629 }
2630
2631 /*****************************************************************
2632 a useful function for returning a path in the Samba state directory
2633 *****************************************************************/
2634
2635 char *state_path(const char *name)
2636 {
2637 return xx_path(name, get_dyn_STATEDIR());
2638 }
2639
2640 /**
2641 * @brief Returns the platform specific shared library extension.
2642 *
2643 * @retval Pointer to a const char * containing the extension.
2644 **/
2645
2646 const char *shlib_ext(void)
2647 {
2648 return get_dyn_SHLIBEXT();
2649 }
2650
2651 /*******************************************************************
2652 Given a filename - get its directory name
2653 NB: Returned in static storage. Caveats:
2654 o If caller wishes to preserve, they should copy.
2655 ********************************************************************/
2656
2657 char *parent_dirname(const char *path)
2658 {
2659 char *parent;
2660
2661 if (!parent_dirname_talloc(talloc_tos(), path, &parent, NULL)) {
2662 return NULL;
2663 }
2664
2665 return parent;
2666 }
2667
2668 bool parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2669 char **parent, const char **name)
2670 {
2671 char *p;
2672 ptrdiff_t len;
2673
2674 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2675
2676 if (p == NULL) {
2677 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2678 return False;
2679 }
2680 if (name) {
2681 *name = "";
2682 }
2683 return True;
2684 }
2685
2686 len = p-dir;
2687
2688 if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2689 return False;
2690 }
2691 memcpy(*parent, dir, len);
2692 (*parent)[len] = '\0';
2693
2694 if (name) {
2695 *name = p+1;
2696 }
2697 return True;
2698 }
2699
2700 /*******************************************************************
2701 Determine if a pattern contains any Microsoft wildcard characters.
2702 *******************************************************************/
2703
2704 bool ms_has_wild(const char *s)
2705 {
2706 char c;
2707
2708 if (lp_posix_pathnames()) {
2709 /* With posix pathnames no characters are wild. */
2710 return False;
2711 }
2712
2713 while ((c = *s++)) {
2714 switch (c) {
2715 case '*':
2716 case '?':
2717 case '<':
2718 case '>':
2719 case '"':
2720 return True;
2721 }
2722 }
2723 return False;
2724 }
2725
2726 bool ms_has_wild_w(const smb_ucs2_t *s)
2727 {
2728 smb_ucs2_t c;
2729 if (!s) return False;
2730 while ((c = *s++)) {
2731 switch (c) {
2732 case UCS2_CHAR('*'):
2733 case UCS2_CHAR('?'):
2734 case UCS2_CHAR('<'):
2735 case UCS2_CHAR('>'):
2736 case UCS2_CHAR('"'):
2737 return True;
2738 }
2739 }
2740 return False;
2741 }
2742
2743 /*******************************************************************
2744 A wrapper that handles case sensitivity and the special handling
2745 of the ".." name.
2746 *******************************************************************/
2747
2748 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2749 {
2750 if (strcmp(string,"..") == 0)
2751 string = ".";
2752 if (strcmp(pattern,".") == 0)
2753 return False;
2754
2755 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2756 }
2757
2758 /*******************************************************************
2759 A wrapper that handles case sensitivity and the special handling
2760 of the ".." name. Varient that is only called by old search code which requires
2761 pattern translation.
2762 *******************************************************************/
2763
2764 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2765 {
2766 if (strcmp(string,"..") == 0)
2767 string = ".";
2768 if (strcmp(pattern,".") == 0)
2769 return False;
2770
2771 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2772 }
2773
2774 /*******************************************************************
2775 A wrapper that handles a list of patters and calls mask_match()
2776 on each. Returns True if any of the patterns match.
2777 *******************************************************************/
2778
2779 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2780 {
2781 while (listLen-- > 0) {
2782 if (mask_match(string, *list++, is_case_sensitive))
2783 return True;
2784 }
2785 return False;
2786 }
2787
2788 /*********************************************************
2789 Recursive routine that is called by unix_wild_match.
2790 *********************************************************/
2791
2792 static bool unix_do_match(const char *regexp, const char *str)
2793 {
2794 const char *p;
2795
2796 for( p = regexp; *p && *str; ) {
2797
2798 switch(*p) {
2799 case '?':
2800 str++;
2801 p++;
2802 break;
2803
2804 case '*':
2805
2806 /*
2807 * Look for a character matching
2808 * the one after the '*'.
2809 */
2810 p++;
2811 if(!*p)
2812 return true; /* Automatic match */
2813 while(*str) {
2814
2815 while(*str && (*p != *str))
2816 str++;
2817
2818 /*
2819 * Patch from weidel@multichart.de. In the case of the regexp
2820 * '*XX*' we want to ensure there are at least 2 'X' characters
2821 * in the string after the '*' for a match to be made.
2822 */
2823
2824 {
2825 int matchcount=0;
2826
2827 /*
2828 * Eat all the characters that match, but count how many there were.
2829 */
2830
2831 while(*str && (*p == *str)) {
2832 str++;
2833 matchcount++;
2834 }
2835
2836 /*
2837 * Now check that if the regexp had n identical characters that
2838 * matchcount had at least that many matches.
2839 */
2840
2841 while ( *(p+1) && (*(p+1) == *p)) {
2842 p++;
2843 matchcount--;
2844 }
2845
2846 if ( matchcount <= 0 )
2847 return false;
2848 }
2849
2850 str--; /* We've eaten the match char after the '*' */
2851
2852 if(unix_do_match(p, str))
2853 return true;
2854
2855 if(!*str)
2856 return false;
2857 else
2858 str++;
2859 }
2860 return false;
2861
2862 default:
2863 if(*str != *p)
2864 return false;
2865 str++;
2866 p++;
2867 break;
2868 }
2869 }
2870
2871 if(!*p && !*str)
2872 return true;
2873
2874 if (!*p && str[0] == '.' && str[1] == 0)
2875 return true;
2876
2877 if (!*str && *p == '?') {
2878 while (*p == '?')
2879 p++;
2880 return(!*p);
2881 }
2882
2883 if(!*str && (*p == '*' && p[1] == '\0'))
2884 return true;
2885
2886 return false;
2887 }
2888
2889 /*******************************************************************
2890 Simple case insensitive interface to a UNIX wildcard matcher.
2891 Returns True if match, False if not.
2892 *******************************************************************/
2893
2894 bool unix_wild_match(const char *pattern, const char *string)
2895 {
2896 TALLOC_CTX *ctx = talloc_stackframe();
2897 char *p2;
2898 char *s2;
2899 char *p;
2900 bool ret = false;
2901
2902 p2 = talloc_strdup(ctx,pattern);
2903 s2 = talloc_strdup(ctx,string);
2904 if (!p2 || !s2) {
2905 TALLOC_FREE(ctx);
2906 return false;
2907 }
2908 strlower_m(p2);
2909 strlower_m(s2);
2910
2911 /* Remove any *? and ** from the pattern as they are meaningless */
2912 for(p = p2; *p; p++) {
2913 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2914 memmove(&p[1], &p[2], strlen(&p[2])+1);
2915 }
2916 }
2917
2918 if (strequal(p2,"*")) {
2919 TALLOC_FREE(ctx);
2920 return true;
2921 }
2922
2923 ret = unix_do_match(p2, s2);
2924 TALLOC_FREE(ctx);
2925 return ret;
2926 }
2927
2928 /**********************************************************************
2929 Converts a name to a fully qualified domain name.
2930 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2931 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2932 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2933 ***********************************************************************/
2934
2935 bool name_to_fqdn(fstring fqdn, const char *name)
2936 {
2937 char *full = NULL;
2938 struct hostent *hp = gethostbyname(name);
2939
2940 if (!hp || !hp->h_name || !*hp->h_name) {
2941 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2942 fstrcpy(fqdn, name);
2943 return false;
2944 }
2945
2946 /* Find out if the fqdn is returned as an alias
2947 * to cope with /etc/hosts files where the first
2948 * name is not the fqdn but the short name */
2949 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2950 int i;
2951 for (i = 0; hp->h_aliases[i]; i++) {
2952 if (strchr_m(hp->h_aliases[i], '.')) {
2953 full = hp->h_aliases[i];
2954 break;
2955 }
2956 }
2957 }
2958 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2959 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2960 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2961 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2962 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2963 full = hp->h_name;
2964 }
2965 if (!full) {
2966 full = hp->h_name;
2967 }
2968
2969 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2970 fstrcpy(fqdn, full);
2971 return true;
2972 }
2973
2974 /**********************************************************************
2975 Extension to talloc_get_type: Abort on type mismatch
2976 ***********************************************************************/
2977
2978 void *talloc_check_name_abort(const void *ptr, const char *name)
2979 {
2980 void *result;
2981
2982 result = talloc_check_name(ptr, name);
2983 if (result != NULL)
2984 return result;
2985
2986 DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
2987 name, talloc_get_name(ptr)));
2988 smb_panic("talloc type mismatch");
2989 /* Keep the compiler happy */
2990 return NULL;
2991 }
2992
2993 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2994 {
2995 switch (share_access & ~FILE_SHARE_DELETE) {
2996 case FILE_SHARE_NONE:
2997 return DENY_ALL;
2998 case FILE_SHARE_READ:
2999 return DENY_WRITE;
3000 case FILE_SHARE_WRITE:
3001 return DENY_READ;
3002 case FILE_SHARE_READ|FILE_SHARE_WRITE:
3003 return DENY_NONE;
3004 }
3005 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
3006 return DENY_DOS;
3007 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
3008 return DENY_FCB;
3009 }
3010
3011 return (uint32)-1;
3012 }
3013
3014 pid_t procid_to_pid(const struct server_id *proc)
3015 {
3016 return proc->pid;
3017 }
3018
3019 static uint32 my_vnn = NONCLUSTER_VNN;
3020
3021 void set_my_vnn(uint32 vnn)
3022 {
3023 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3024 my_vnn = vnn;
3025 }
3026
3027 uint32 get_my_vnn(void)
3028 {
3029 return my_vnn;
3030 }
3031
3032 struct server_id pid_to_procid(pid_t pid)
3033 {
3034 struct server_id result;
3035 result.pid = pid;
3036 #ifdef CLUSTER_SUPPORT
3037 result.vnn = my_vnn;
3038 #endif
3039 return result;
3040 }
3041
3042 struct server_id procid_self(void)
3043 {
3044 return pid_to_procid(sys_getpid());
3045 }
3046
3047 struct server_id server_id_self(void)
3048 {
3049 return procid_self();
3050 }
3051
3052 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
3053 {
3054 if (p1->pid != p2->pid)
3055 return False;
3056 #ifdef CLUSTER_SUPPORT
3057 if (p1->vnn != p2->vnn)
3058 return False;
3059 #endif
3060 return True;
3061 }
3062
3063 bool cluster_id_equal(const struct server_id *id1,
3064 const struct server_id *id2)
3065 {
3066 return procid_equal(id1, id2);
3067 }
3068
3069 bool procid_is_me(const struct server_id *pid)
3070 {
3071 if (pid->pid != sys_getpid())
3072 return False;
3073 #ifdef CLUSTER_SUPPORT
3074 if (pid->vnn != my_vnn)
3075 return False;
3076 #endif
3077 return True;
3078 }
3079
3080 struct server_id interpret_pid(const char *pid_string)
3081 {
3082 #ifdef CLUSTER_SUPPORT
3083 unsigned int vnn, pid;
3084 struct server_id result;
3085 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3086 result.vnn = vnn;
3087 result.pid = pid;
3088 }
3089 else if (sscanf(pid_string, "%u", &pid) == 1) {
3090 result.vnn = get_my_vnn();
3091 result.pid = pid;
3092 }
3093 else {
3094 result.vnn = NONCLUSTER_VNN;
3095 result.pid = -1;
3096 }
3097 return result;
3098 #else
3099 return pid_to_procid(atoi(pid_string));
3100 #endif
3101 }
3102
3103 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3104 {
3105 #ifdef CLUSTER_SUPPORT
3106 if (pid->vnn == NONCLUSTER_VNN) {
3107 return talloc_asprintf(mem_ctx,
3108 "%d",
3109 (int)pid->pid);
3110 }
3111 else {
3112 return talloc_asprintf(mem_ctx,
3113 "%u:%d",
3114 (unsigned)pid->vnn,
3115 (int)pid->pid);
3116 }
3117 #else
3118 return talloc_asprintf(mem_ctx,
3119 "%d",
3120 (int)pid->pid);
3121 #endif
3122 }
3123
3124 char *procid_str_static(const struct server_id *pid)
3125 {
3126 return procid_str(talloc_tos(), pid);
3127 }
3128
3129 bool procid_valid(const struct server_id *pid)
3130 {
3131 return (pid->pid != -1);
3132 }
3133
3134 bool procid_is_local(const struct server_id *pid)
3135 {
3136 #ifdef CLUSTER_SUPPORT
3137 return pid->vnn == my_vnn;
3138 #else
3139 return True;
3140 #endif
3141 }
3142
3143 int this_is_smp(void)
3144 {
3145 #if defined(HAVE_SYSCONF)
3146
3147 #if defined(SYSCONF_SC_NPROC_ONLN)
3148 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3149 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3150 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3151 #else
3152 return 0;
3153 #endif
3154
3155 #else
3156 return 0;
3157 #endif
3158 }
3159
3160 /****************************************************************
3161 Check if an offset into a buffer is safe.
3162 If this returns True it's safe to indirect into the byte at
3163 pointer ptr+off.
3164 ****************************************************************/
3165
3166 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3167 {
3168 const char *end_base = buf_base + buf_len;
3169 char *end_ptr = ptr + off;
3170
3171 if (!buf_base || !ptr) {
3172 return False;
3173 }
3174
3175 if (end_base < buf_base || end_ptr < ptr) {
3176 return False; /* wrap. */
3177 }
3178
3179 if (end_ptr < end_base) {
3180 return True;
3181 }
3182 return False;
3183 }
3184
3185 /****************************************************************
3186 Return a safe pointer into a buffer, or NULL.
3187 ****************************************************************/
3188
3189 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3190 {
3191 return is_offset_safe(buf_base, buf_len, ptr, off) ?
3192 ptr + off : NULL;
3193 }
3194
3195 /****************************************************************
3196 Return a safe pointer into a string within a buffer, or NULL.
3197 ****************************************************************/
3198
3199 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3200 {
3201 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3202 return NULL;
3203 }
3204 /* Check if a valid string exists at this offset. */
3205 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3206 return NULL;
3207 }
3208 return ptr + off;
3209 }
3210
3211 /****************************************************************
3212 Return an SVAL at a pointer, or failval if beyond the end.
3213 ****************************************************************/
3214
3215 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3216 {
3217 /*
3218 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3219 * NOT ptr[2].
3220 */
3221 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3222 return failval;
3223 }
3224 return SVAL(ptr,off);
3225 }
3226
3227 /****************************************************************
3228 Return an IVAL at a pointer, or failval if beyond the end.
3229 ****************************************************************/
3230
3231 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3232 {
3233 /*
3234 * Note we use off+3 here, not off+4 as IVAL accesses
3235 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3236 */
3237 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3238 return failval;
3239 }
3240 return IVAL(ptr,off);
3241 }
3242
3243 /****************************************************************
3244 Split DOM\user into DOM and user. Do not mix with winbind variants of that
3245 call (they take care of winbind separator and other winbind specific settings).
3246 ****************************************************************/
3247
3248 void split_domain_user(TALLOC_CTX *mem_ctx,
3249 const char *full_name,
3250 char **domain,
3251 char **user)
3252 {
3253 const char *p = NULL;
3254
3255 p = strchr_m(full_name, '\\');
3256
3257 if (p != NULL) {
3258 *domain = talloc_strndup(mem_ctx, full_name,
3259 PTR_DIFF(p, full_name));
3260 *user = talloc_strdup(mem_ctx, p+1);
3261 } else {
3262 *domain = talloc_strdup(mem_ctx, "");
3263 *user = talloc_strdup(mem_ctx, full_name);
3264 }
3265 }
3266
3267 #if 0
3268
3269 Disable these now we have checked all code paths and ensured
3270 NULL returns on zero request. JRA.
3271
3272 /****************************************************************
3273 talloc wrapper functions that guarentee a null pointer return
3274 if size == 0.
3275 ****************************************************************/
3276
3277 #ifndef MAX_TALLOC_SIZE
3278 #define MAX_TALLOC_SIZE 0x10000000
3279 #endif
3280
3281 /*
3282 * talloc and zero memory.
3283 * - returns NULL if size is zero.
3284 */
3285
3286 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3287 {
3288 void *p;
3289
3290 if (size == 0) {
3291 return NULL;
3292 }
3293
3294 p = talloc_named_const(ctx, size, name);
3295
3296 if (p) {
3297 memset(p, '\0', size);
3298 }
3299
3300 return p;
3301 }
3302
3303 /*
3304 * memdup with a talloc.
3305 * - returns NULL if size is zero.
3306 */
3307
3308 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3309 {
3310 void *newp;
3311
3312 if (size == 0) {
3313 return NULL;
3314 }
3315
3316 newp = talloc_named_const(t, size, name);
3317 if (newp) {
3318 memcpy(newp, p, size);
3319 }
3320
3321 return newp;
3322 }
3323
3324 /*
3325 * alloc an array, checking for integer overflow in the array size.
3326 * - returns NULL if count or el_size are zero.
3327 */
3328
3329 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3330 {
3331 if (count >= MAX_TALLOC_SIZE/el_size) {
3332 return NULL;
3333 }
3334
3335 if (el_size == 0 || count == 0) {
3336 return NULL;
3337 }
3338
3339 return talloc_named_const(ctx, el_size * count, name);
3340 }
3341
3342 /*
3343 * alloc an zero array, checking for integer overflow in the array size
3344 * - returns NULL if count or el_size are zero.
3345 */
3346
3347 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3348 {
3349 if (count >= MAX_TALLOC_SIZE/el_size) {
3350 return NULL;
3351 }
3352
3353 if (el_size == 0 || count == 0) {
3354 return NULL;
3355 }
3356
3357 return _talloc_zero(ctx, el_size * count, name);
3358 }
3359
3360 /*
3361 * Talloc wrapper that returns NULL if size == 0.
3362 */
3363 void *talloc_zeronull(const void *context, size_t size, const char *name)
3364 {
3365 if (size == 0) {
3366 return NULL;
3367 }
3368 return talloc_named_const(context, size, name);
3369 }
3370 #endif
3371
3372 /* Split a path name into filename and stream name components. Canonicalise
3373 * such that an implicit $DATA token is always explicit.
3374 *
3375 * The "specification" of this function can be found in the
3376 * run_local_stream_name() function in torture.c, I've tried those
3377 * combinations against a W2k3 server.
3378 */
3379
3380 NTSTATUS split_ntfs_stream_name(TALLOC_CTX *mem_ctx, const char *fname,
3381 char **pbase, char **pstream)
3382 {
3383 char *base = NULL;
3384 char *stream = NULL;
3385 char *sname; /* stream name */
3386 const char *stype; /* stream type */
3387
3388 DEBUG(10, ("split_ntfs_stream_name called for [%s]\n", fname));
3389
3390 sname = strchr_m(fname, ':');
3391
3392 if (lp_posix_pathnames() || (sname == NULL)) {
3393 if (pbase != NULL) {
3394 base = talloc_strdup(mem_ctx, fname);
3395 NT_STATUS_HAVE_NO_MEMORY(base);
3396 }
3397 goto done;
3398 }
3399
3400 if (pbase != NULL) {
3401 base = talloc_strndup(mem_ctx, fname, PTR_DIFF(sname, fname));
3402 NT_STATUS_HAVE_NO_MEMORY(base);
3403 }
3404
3405 sname += 1;
3406
3407 stype = strchr_m(sname, ':');
3408
3409 if (stype == NULL) {
3410 sname = talloc_strdup(mem_ctx, sname);
3411 stype = "$DATA";
3412 }
3413 else {
3414 if (StrCaseCmp(stype, ":$DATA") != 0) {
3415 /*
3416 * If there is an explicit stream type, so far we only
3417 * allow $DATA. Is there anything else allowed? -- vl
3418 */
3419 DEBUG(10, ("[%s] is an invalid stream type\n", stype));
3420 TALLOC_FREE(base);
3421 return NT_STATUS_OBJECT_NAME_INVALID;
3422 }
3423 sname = talloc_strndup(mem_ctx, sname, PTR_DIFF(stype, sname));
3424 stype += 1;
3425 }
3426
3427 if (sname == NULL) {
3428 TALLOC_FREE(base);
3429 return NT_STATUS_NO_MEMORY;
3430 }
3431
3432 if (sname[0] == '\0') {
3433 /*
3434 * no stream name, so no stream
3435 */
3436 goto done;
3437 }
3438
3439 if (pstream != NULL) {
3440 stream = talloc_asprintf(mem_ctx, "%s:%s", sname, stype);
3441 if (stream == NULL) {
3442 TALLOC_FREE(sname);
3443 TALLOC_FREE(base);
3444 return NT_STATUS_NO_MEMORY;
3445 }
3446 /*
3447 * upper-case the type field
3448 */
3449 strupper_m(strchr_m(stream, ':')+1);
3450 }
3451
3452 done:
3453 if (pbase != NULL) {
3454 *pbase = base;
3455 }
3456 if (pstream != NULL) {
3457 *pstream = stream;
3458 }
3459 return NT_STATUS_OK;
3460 }
3461
3462 bool is_valid_policy_hnd(const POLICY_HND *hnd)
3463 {
3464 POLICY_HND tmp;
3465 ZERO_STRUCT(tmp);
3466 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
3467 }
3468
3469 bool policy_hnd_equal(const struct policy_handle *hnd1,
3470 const struct policy_handle *hnd2)
3471 {
3472 if (!hnd1 || !hnd2) {
3473 return false;
3474 }
3475
3476 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
3477 }
3478
3479 /****************************************************************
3480 strip off leading '\\' from a hostname
3481 ****************************************************************/
3482
3483 const char *strip_hostname(const char *s)
3484 {
3485 if (!s) {
3486 return NULL;
3487 }
3488
3489 if (strlen_m(s) < 3) {
3490 return s;
3491 }
3492
3493 if (s[0] == '\\') s++;
3494 if (s[0] == '\\') s++;
3495
3496 return s;
3497 }
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