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dsdb: Ignore errors from search in dns_notify module
[Samba.git] / source3 / lib / util.c
blobb64b32b9a792088f2af409c889cfae2d50b3f392
1 /*
2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2007
6 Copyright (C) Simo Sorce 2001
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8 Copyright (C) James Peach 2006
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25 #include "system/passwd.h"
26 #include "system/filesys.h"
27 #include "util_tdb.h"
28 #include "ctdbd_conn.h"
29 #include "../lib/util/util_pw.h"
30 #include "messages.h"
31 #include <ccan/hash/hash.h>
32 #include "libcli/security/security.h"
33 #include "serverid.h"
34 #include "lib/sys_rw.h"
35 #include "lib/sys_rw_data.h"
36
37 #ifdef HAVE_SYS_PRCTL_H
38 #include <sys/prctl.h>
39 #endif
40
41 /* Max allowable allococation - 256mb - 0x10000000 */
42 #define MAX_ALLOC_SIZE (1024*1024*256)
43
44 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
45 #ifdef WITH_NISPLUS_HOME
46 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
47 /*
48 * The following lines are needed due to buggy include files
49 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
50 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
51 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
52 * an enum in /usr/include/rpcsvc/nis.h.
53 */
54
55 #if defined(GROUP)
56 #undef GROUP
57 #endif
58
59 #if defined(GROUP_OBJ)
60 #undef GROUP_OBJ
61 #endif
62
63 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
64
65 #include <rpcsvc/nis.h>
66
67 #endif /* WITH_NISPLUS_HOME */
68 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
69
70 static enum protocol_types Protocol = PROTOCOL_COREPLUS;
71
72 enum protocol_types get_Protocol(void)
73 {
74 return Protocol;
75 }
76
77 void set_Protocol(enum protocol_types p)
78 {
79 Protocol = p;
80 }
81
82 static enum remote_arch_types ra_type = RA_UNKNOWN;
83
84 void gfree_all( void )
85 {
86 gfree_names();
87 gfree_loadparm();
88 gfree_charcnv();
89 gfree_interfaces();
90 gfree_debugsyms();
91 }
92
93 /*******************************************************************
94 Check if a file exists - call vfs_file_exist for samba files.
95 ********************************************************************/
96
97 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf,
98 bool fake_dir_create_times)
99 {
100 SMB_STRUCT_STAT st;
101 if (!sbuf)
102 sbuf = &st;
103
104 if (sys_stat(fname, sbuf, fake_dir_create_times) != 0)
105 return(False);
106
107 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
108 }
109
110 /*******************************************************************
111 Check if a unix domain socket exists - call vfs_file_exist for samba files.
112 ********************************************************************/
113
114 bool socket_exist(const char *fname)
115 {
116 SMB_STRUCT_STAT st;
117 if (sys_stat(fname, &st, false) != 0)
118 return(False);
119
120 return S_ISSOCK(st.st_ex_mode);
121 }
122
123 /*******************************************************************
124 Returns the size in bytes of the named given the stat struct.
125 ********************************************************************/
126
127 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
128 {
129 return sbuf->st_ex_size;
130 }
131
132 /****************************************************************************
133 Check two stats have identical dev and ino fields.
134 ****************************************************************************/
135
136 bool check_same_dev_ino(const SMB_STRUCT_STAT *sbuf1,
137 const SMB_STRUCT_STAT *sbuf2)
138 {
139 if (sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
140 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
141 return false;
142 }
143 return true;
144 }
145
146 /****************************************************************************
147 Check if a stat struct is identical for use.
148 ****************************************************************************/
149
150 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
151 const SMB_STRUCT_STAT *sbuf2)
152 {
153 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
154 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
155 !check_same_dev_ino(sbuf1, sbuf2)) {
156 return false;
157 }
158 return true;
159 }
160
161 /*******************************************************************
162 Show a smb message structure.
163 ********************************************************************/
164
165 void show_msg(const char *buf)
166 {
167 int i;
168 int bcc=0;
169
170 if (!DEBUGLVL(5))
171 return;
172
173 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
174 smb_len(buf),
175 (int)CVAL(buf,smb_com),
176 (int)CVAL(buf,smb_rcls),
177 (int)CVAL(buf,smb_reh),
178 (int)SVAL(buf,smb_err),
179 (int)CVAL(buf,smb_flg),
180 (int)SVAL(buf,smb_flg2)));
181 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
182 (int)SVAL(buf,smb_tid),
183 (int)SVAL(buf,smb_pid),
184 (int)SVAL(buf,smb_uid),
185 (int)SVAL(buf,smb_mid)));
186 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
187
188 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
189 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
190 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
191
192 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
193
194 DEBUGADD(5,("smb_bcc=%d\n",bcc));
195
196 if (DEBUGLEVEL < 10)
197 return;
198
199 if (DEBUGLEVEL < 50)
200 bcc = MIN(bcc, 512);
201
202 dump_data(10, (const uint8 *)smb_buf_const(buf), bcc);
203 }
204
205 /*******************************************************************
206 Setup only the byte count for a smb message.
207 ********************************************************************/
208
209 int set_message_bcc(char *buf,int num_bytes)
210 {
211 int num_words = CVAL(buf,smb_wct);
212 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
213 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
214 return (smb_size + num_words*2 + num_bytes);
215 }
216
217 /*******************************************************************
218 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
219 Return the bytes added
220 ********************************************************************/
221
222 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
223 {
224 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
225 uint8 *tmp;
226
227 if (!(tmp = talloc_realloc(NULL, *outbuf, uint8, newlen))) {
228 DEBUG(0, ("talloc failed\n"));
229 return -1;
230 }
231 *outbuf = tmp;
232
233 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
234 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
235 return blob.length;
236 }
237
238 /*******************************************************************
239 Reduce a file name, removing .. elements.
240 ********************************************************************/
241
242 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
243 {
244 char *p = NULL;
245 char *str = NULL;
246
247 DEBUG(3,("dos_clean_name [%s]\n",s));
248
249 /* remove any double slashes */
250 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
251 if (!str) {
252 return NULL;
253 }
254
255 /* Remove leading .\\ characters */
256 if(strncmp(str, ".\\", 2) == 0) {
257 trim_string(str, ".\\", NULL);
258 if(*str == 0) {
259 str = talloc_strdup(ctx, ".\\");
260 if (!str) {
261 return NULL;
262 }
263 }
264 }
265
266 while ((p = strstr_m(str,"\\..\\")) != NULL) {
267 char *s1;
268
269 *p = 0;
270 s1 = p+3;
271
272 if ((p=strrchr_m(str,'\\')) != NULL) {
273 *p = 0;
274 } else {
275 *str = 0;
276 }
277 str = talloc_asprintf(ctx,
278 "%s%s",
279 str,
280 s1);
281 if (!str) {
282 return NULL;
283 }
284 }
285
286 trim_string(str,NULL,"\\..");
287 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
288 }
289
290 /*******************************************************************
291 Reduce a file name, removing .. elements.
292 ********************************************************************/
293
294 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
295 {
296 char *p = NULL;
297 char *str = NULL;
298
299 DEBUG(3,("unix_clean_name [%s]\n",s));
300
301 /* remove any double slashes */
302 str = talloc_all_string_sub(ctx, s, "//","/");
303 if (!str) {
304 return NULL;
305 }
306
307 /* Remove leading ./ characters */
308 if(strncmp(str, "./", 2) == 0) {
309 trim_string(str, "./", NULL);
310 if(*str == 0) {
311 str = talloc_strdup(ctx, "./");
312 if (!str) {
313 return NULL;
314 }
315 }
316 }
317
318 while ((p = strstr_m(str,"/../")) != NULL) {
319 char *s1;
320
321 *p = 0;
322 s1 = p+3;
323
324 if ((p=strrchr_m(str,'/')) != NULL) {
325 *p = 0;
326 } else {
327 *str = 0;
328 }
329 str = talloc_asprintf(ctx,
330 "%s%s",
331 str,
332 s1);
333 if (!str) {
334 return NULL;
335 }
336 }
337
338 trim_string(str,NULL,"/..");
339 return talloc_all_string_sub(ctx, str, "/./", "/");
340 }
341
342 char *clean_name(TALLOC_CTX *ctx, const char *s)
343 {
344 char *str = dos_clean_name(ctx, s);
345 if (!str) {
346 return NULL;
347 }
348 return unix_clean_name(ctx, str);
349 }
350
351 /*******************************************************************
352 Write data into an fd at a given offset. Ignore seek errors.
353 ********************************************************************/
354
355 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, off_t pos)
356 {
357 size_t total=0;
358 ssize_t ret;
359
360 if (pos == (off_t)-1) {
361 return write_data(fd, buffer, N);
362 }
363 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
364 while (total < N) {
365 ret = sys_pwrite(fd,buffer + total,N - total, pos);
366 if (ret == -1 && errno == ESPIPE) {
367 return write_data(fd, buffer + total,N - total);
368 }
369 if (ret == -1) {
370 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
371 return -1;
372 }
373 if (ret == 0) {
374 return total;
375 }
376 total += ret;
377 pos += ret;
378 }
379 return (ssize_t)total;
380 #else
381 /* Use lseek and write_data. */
382 if (lseek(fd, pos, SEEK_SET) == -1) {
383 if (errno != ESPIPE) {
384 return -1;
385 }
386 }
387 return write_data(fd, buffer, N);
388 #endif
389 }
390
391 static int reinit_after_fork_pipe[2] = { -1, -1 };
392
393 NTSTATUS init_before_fork(void)
394 {
395 int ret;
396
397 ret = pipe(reinit_after_fork_pipe);
398 if (ret == -1) {
399 NTSTATUS status;
400
401 status = map_nt_error_from_unix_common(errno);
402
403 DEBUG(0, ("Error creating child_pipe: %s\n",
404 nt_errstr(status)));
405
406 return status;
407 }
408
409 return NT_STATUS_OK;
410 }
411
412 /**
413 * Detect died parent by detecting EOF on the pipe
414 */
415 static void reinit_after_fork_pipe_handler(struct tevent_context *ev,
416 struct tevent_fd *fde,
417 uint16_t flags,
418 void *private_data)
419 {
420 char c;
421
422 if (sys_read(reinit_after_fork_pipe[0], &c, 1) != 1) {
423 /*
424 * we have reached EOF on stdin, which means the
425 * parent has exited. Shutdown the server
426 */
427 (void)kill(getpid(), SIGTERM);
428 }
429 }
430
431
432 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
433 struct tevent_context *ev_ctx,
434 bool parent_longlived)
435 {
436 NTSTATUS status = NT_STATUS_OK;
437
438 if (reinit_after_fork_pipe[1] != -1) {
439 close(reinit_after_fork_pipe[1]);
440 reinit_after_fork_pipe[1] = -1;
441 }
442
443 /* Reset the state of the random
444 * number generation system, so
445 * children do not get the same random
446 * numbers as each other */
447 set_need_random_reseed();
448
449 /* tdb needs special fork handling */
450 if (tdb_reopen_all(parent_longlived ? 1 : 0) != 0) {
451 DEBUG(0,("tdb_reopen_all failed.\n"));
452 status = NT_STATUS_OPEN_FAILED;
453 goto done;
454 }
455
456 if (ev_ctx != NULL) {
457 tevent_set_trace_callback(ev_ctx, NULL, NULL);
458 if (tevent_re_initialise(ev_ctx) != 0) {
459 smb_panic(__location__ ": Failed to re-initialise event context");
460 }
461 }
462
463 if (reinit_after_fork_pipe[0] != -1) {
464 struct tevent_fd *fde;
465
466 fde = tevent_add_fd(ev_ctx, ev_ctx /* TALLOC_CTX */,
467 reinit_after_fork_pipe[0], TEVENT_FD_READ,
468 reinit_after_fork_pipe_handler, NULL);
469 if (fde == NULL) {
470 smb_panic(__location__ ": Failed to add reinit_after_fork pipe event");
471 }
472 }
473
474 if (msg_ctx) {
475 /*
476 * For clustering, we need to re-init our ctdbd connection after the
477 * fork
478 */
479 status = messaging_reinit(msg_ctx);
480 if (!NT_STATUS_IS_OK(status)) {
481 DEBUG(0,("messaging_reinit() failed: %s\n",
482 nt_errstr(status)));
483 }
484 }
485 done:
486 return status;
487 }
488
489 /****************************************************************************
490 (Hopefully) efficient array append.
491 ****************************************************************************/
492
493 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
494 void *element, void *_array, uint32 *num_elements,
495 ssize_t *array_size)
496 {
497 void **array = (void **)_array;
498
499 if (*array_size < 0) {
500 return;
501 }
502
503 if (*array == NULL) {
504 if (*array_size == 0) {
505 *array_size = 128;
506 }
507
508 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
509 goto error;
510 }
511
512 *array = TALLOC(mem_ctx, element_size * (*array_size));
513 if (*array == NULL) {
514 goto error;
515 }
516 }
517
518 if (*num_elements == *array_size) {
519 *array_size *= 2;
520
521 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
522 goto error;
523 }
524
525 *array = TALLOC_REALLOC(mem_ctx, *array,
526 element_size * (*array_size));
527
528 if (*array == NULL) {
529 goto error;
530 }
531 }
532
533 memcpy((char *)(*array) + element_size*(*num_elements),
534 element, element_size);
535 *num_elements += 1;
536
537 return;
538
539 error:
540 *num_elements = 0;
541 *array_size = -1;
542 }
543
544 /****************************************************************************
545 Get my own domain name, or "" if we have none.
546 ****************************************************************************/
547
548 char *get_mydnsdomname(TALLOC_CTX *ctx)
549 {
550 const char *domname;
551 char *p;
552
553 domname = get_mydnsfullname();
554 if (!domname) {
555 return NULL;
556 }
557
558 p = strchr_m(domname, '.');
559 if (p) {
560 p++;
561 return talloc_strdup(ctx, p);
562 } else {
563 return talloc_strdup(ctx, "");
564 }
565 }
566
567 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
568 /******************************************************************
569 Remove any mount options such as -rsize=2048,wsize=2048 etc.
570 Based on a fix from <Thomas.Hepper@icem.de>.
571 Returns a malloc'ed string.
572 *******************************************************************/
573
574 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
575 {
576 if (*str == '-') {
577 const char *p = str;
578 while(*p && !isspace(*p))
579 p++;
580 while(*p && isspace(*p))
581 p++;
582 if(*p) {
583 return talloc_strdup(ctx, p);
584 }
585 }
586 return NULL;
587 }
588
589 /*******************************************************************
590 Patch from jkf@soton.ac.uk
591 Split Luke's automount_server into YP lookup and string splitter
592 so can easily implement automount_path().
593 Returns a malloc'ed string.
594 *******************************************************************/
595
596 #ifdef WITH_NISPLUS_HOME
597 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
598 {
599 char *value = NULL;
600
601 char *nis_map = (char *)lp_homedir_map();
602
603 char buffer[NIS_MAXATTRVAL + 1];
604 nis_result *result;
605 nis_object *object;
606 entry_obj *entry;
607
608 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
609 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
610
611 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
612 if (result->status != NIS_SUCCESS) {
613 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
614 } else {
615 object = result->objects.objects_val;
616 if (object->zo_data.zo_type == ENTRY_OBJ) {
617 entry = &object->zo_data.objdata_u.en_data;
618 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
619 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
620
621 value = talloc_strdup(ctx,
622 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
623 if (!value) {
624 nis_freeresult(result);
625 return NULL;
626 }
627 value = talloc_string_sub(ctx,
628 value,
629 "&",
630 user_name);
631 }
632 }
633 }
634 nis_freeresult(result);
635
636 if (value) {
637 value = strip_mount_options(ctx, value);
638 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
639 user_name, value));
640 }
641 return value;
642 }
643 #else /* WITH_NISPLUS_HOME */
644
645 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
646 {
647 char *value = NULL;
648
649 int nis_error; /* returned by yp all functions */
650 char *nis_result; /* yp_match inits this */
651 int nis_result_len; /* and set this */
652 char *nis_domain; /* yp_get_default_domain inits this */
653 char *nis_map = lp_homedir_map(talloc_tos());
654
655 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
656 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
657 return NULL;
658 }
659
660 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
661
662 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
663 strlen(user_name), &nis_result,
664 &nis_result_len)) == 0) {
665 if (nis_result_len > 0 && nis_result[nis_result_len] == '\n') {
666 nis_result[nis_result_len] = '\0';
667 }
668 value = talloc_strdup(ctx, nis_result);
669 if (!value) {
670 return NULL;
671 }
672 value = strip_mount_options(ctx, value);
673 } else if(nis_error == YPERR_KEY) {
674 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
675 user_name, nis_map));
676 DEBUG(3, ("using defaults for server and home directory\n"));
677 } else {
678 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
679 yperr_string(nis_error), user_name, nis_map));
680 }
681
682 if (value) {
683 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
684 }
685 return value;
686 }
687 #endif /* WITH_NISPLUS_HOME */
688 #endif
689
690 bool process_exists(const struct server_id pid)
691 {
692 return serverid_exists(&pid);
693 }
694
695 /*******************************************************************
696 Convert a uid into a user name.
697 ********************************************************************/
698
699 const char *uidtoname(uid_t uid)
700 {
701 TALLOC_CTX *ctx = talloc_tos();
702 char *name = NULL;
703 struct passwd *pass = NULL;
704
705 pass = getpwuid_alloc(ctx,uid);
706 if (pass) {
707 name = talloc_strdup(ctx,pass->pw_name);
708 TALLOC_FREE(pass);
709 } else {
710 name = talloc_asprintf(ctx,
711 "%ld",
712 (long int)uid);
713 }
714 return name;
715 }
716
717 /*******************************************************************
718 Convert a gid into a group name.
719 ********************************************************************/
720
721 char *gidtoname(gid_t gid)
722 {
723 struct group *grp;
724
725 grp = getgrgid(gid);
726 if (grp) {
727 return talloc_strdup(talloc_tos(), grp->gr_name);
728 }
729 else {
730 return talloc_asprintf(talloc_tos(),
731 "%d",
732 (int)gid);
733 }
734 }
735
736 /*******************************************************************
737 Convert a user name into a uid.
738 ********************************************************************/
739
740 uid_t nametouid(const char *name)
741 {
742 struct passwd *pass;
743 char *p;
744 uid_t u;
745
746 pass = Get_Pwnam_alloc(talloc_tos(), name);
747 if (pass) {
748 u = pass->pw_uid;
749 TALLOC_FREE(pass);
750 return u;
751 }
752
753 u = (uid_t)strtol(name, &p, 0);
754 if ((p != name) && (*p == '\0'))
755 return u;
756
757 return (uid_t)-1;
758 }
759
760 /*******************************************************************
761 Convert a name to a gid_t if possible. Return -1 if not a group.
762 ********************************************************************/
763
764 gid_t nametogid(const char *name)
765 {
766 struct group *grp;
767 char *p;
768 gid_t g;
769
770 g = (gid_t)strtol(name, &p, 0);
771 if ((p != name) && (*p == '\0'))
772 return g;
773
774 grp = getgrnam(name);
775 if (grp)
776 return(grp->gr_gid);
777 return (gid_t)-1;
778 }
779
780 /*******************************************************************
781 Something really nasty happened - panic !
782 ********************************************************************/
783
784 void smb_panic_s3(const char *why)
785 {
786 char *cmd;
787 int result;
788
789 DEBUG(0,("PANIC (pid %llu): %s\n",
790 (unsigned long long)getpid(), why));
791 log_stack_trace();
792
793 #if defined(HAVE_PRCTL) && defined(PR_SET_PTRACER)
794 /*
795 * Make sure all children can attach a debugger.
796 */
797 prctl(PR_SET_PTRACER, getpid(), 0, 0, 0);
798 #endif
799
800 cmd = lp_panic_action(talloc_tos());
801 if (cmd && *cmd) {
802 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
803 result = system(cmd);
804
805 if (result == -1)
806 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
807 strerror(errno)));
808 else
809 DEBUG(0, ("smb_panic(): action returned status %d\n",
810 WEXITSTATUS(result)));
811 }
812
813 dump_core();
814 }
815
816 /*******************************************************************
817 Print a backtrace of the stack to the debug log. This function
818 DELIBERATELY LEAKS MEMORY. The expectation is that you should
819 exit shortly after calling it.
820 ********************************************************************/
821
822 #ifdef HAVE_LIBUNWIND_H
823 #include <libunwind.h>
824 #endif
825
826 #ifdef HAVE_EXECINFO_H
827 #include <execinfo.h>
828 #endif
829
830 #ifdef HAVE_LIBEXC_H
831 #include <libexc.h>
832 #endif
833
834 void log_stack_trace(void)
835 {
836 #ifdef HAVE_LIBUNWIND
837 /* Try to use libunwind before any other technique since on ia64
838 * libunwind correctly walks the stack in more circumstances than
839 * backtrace.
840 */
841 unw_cursor_t cursor;
842 unw_context_t uc;
843 unsigned i = 0;
844
845 char procname[256];
846 unw_word_t ip, sp, off;
847
848 procname[sizeof(procname) - 1] = '\0';
849
850 if (unw_getcontext(&uc) != 0) {
851 goto libunwind_failed;
852 }
853
854 if (unw_init_local(&cursor, &uc) != 0) {
855 goto libunwind_failed;
856 }
857
858 DEBUG(0, ("BACKTRACE:\n"));
859
860 do {
861 ip = sp = 0;
862 unw_get_reg(&cursor, UNW_REG_IP, &ip);
863 unw_get_reg(&cursor, UNW_REG_SP, &sp);
864
865 switch (unw_get_proc_name(&cursor,
866 procname, sizeof(procname) - 1, &off) ) {
867 case 0:
868 /* Name found. */
869 case -UNW_ENOMEM:
870 /* Name truncated. */
871 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
872 i, procname, (long long)off,
873 (long long)ip, (long long) sp));
874 break;
875 default:
876 /* case -UNW_ENOINFO: */
877 /* case -UNW_EUNSPEC: */
878 /* No symbol name found. */
879 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
880 i, "<unknown symbol>",
881 (long long)ip, (long long) sp));
882 }
883 ++i;
884 } while (unw_step(&cursor) > 0);
885
886 return;
887
888 libunwind_failed:
889 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
890
891 #elif HAVE_BACKTRACE_SYMBOLS
892 void *backtrace_stack[BACKTRACE_STACK_SIZE];
893 size_t backtrace_size;
894 char **backtrace_strings;
895
896 /* get the backtrace (stack frames) */
897 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
898 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
899
900 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
901 (unsigned long)backtrace_size));
902
903 if (backtrace_strings) {
904 int i;
905
906 for (i = 0; i < backtrace_size; i++)
907 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
908
909 /* Leak the backtrace_strings, rather than risk what free() might do */
910 }
911
912 #elif HAVE_LIBEXC
913
914 /* The IRIX libexc library provides an API for unwinding the stack. See
915 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
916 * since we are about to abort anyway, it hardly matters.
917 */
918
919 #define NAMESIZE 32 /* Arbitrary */
920
921 __uint64_t addrs[BACKTRACE_STACK_SIZE];
922 char * names[BACKTRACE_STACK_SIZE];
923 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
924
925 int i;
926 int levels;
927
928 ZERO_ARRAY(addrs);
929 ZERO_ARRAY(names);
930 ZERO_ARRAY(namebuf);
931
932 /* We need to be root so we can open our /proc entry to walk
933 * our stack. It also helps when we want to dump core.
934 */
935 become_root();
936
937 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
938 names[i] = namebuf + (i * NAMESIZE);
939 }
940
941 levels = trace_back_stack(0, addrs, names,
942 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
943
944 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
945 for (i = 0; i < levels; i++) {
946 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
947 }
948 #undef NAMESIZE
949
950 #else
951 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
952 #endif
953 }
954
955 /*******************************************************************
956 A readdir wrapper which just returns the file name.
957 ********************************************************************/
958
959 const char *readdirname(DIR *p)
960 {
961 struct dirent *ptr;
962 char *dname;
963
964 if (!p)
965 return(NULL);
966
967 ptr = (struct dirent *)readdir(p);
968 if (!ptr)
969 return(NULL);
970
971 dname = ptr->d_name;
972
973 #ifdef NEXT2
974 if (telldir(p) < 0)
975 return(NULL);
976 #endif
977
978 #ifdef HAVE_BROKEN_READDIR_NAME
979 /* using /usr/ucb/cc is BAD */
980 dname = dname - 2;
981 #endif
982
983 return talloc_strdup(talloc_tos(), dname);
984 }
985
986 /*******************************************************************
987 Utility function used to decide if the last component
988 of a path matches a (possibly wildcarded) entry in a namelist.
989 ********************************************************************/
990
991 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
992 {
993 const char *last_component;
994
995 /* if we have no list it's obviously not in the path */
996 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
997 return False;
998 }
999
1000 DEBUG(8, ("is_in_path: %s\n", name));
1001
1002 /* Get the last component of the unix name. */
1003 last_component = strrchr_m(name, '/');
1004 if (!last_component) {
1005 last_component = name;
1006 } else {
1007 last_component++; /* Go past '/' */
1008 }
1009
1010 for(; namelist->name != NULL; namelist++) {
1011 if(namelist->is_wild) {
1012 if (mask_match(last_component, namelist->name, case_sensitive)) {
1013 DEBUG(8,("is_in_path: mask match succeeded\n"));
1014 return True;
1015 }
1016 } else {
1017 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1018 (!case_sensitive && (strcasecmp_m(last_component, namelist->name) == 0))) {
1019 DEBUG(8,("is_in_path: match succeeded\n"));
1020 return True;
1021 }
1022 }
1023 }
1024 DEBUG(8,("is_in_path: match not found\n"));
1025 return False;
1026 }
1027
1028 /*******************************************************************
1029 Strip a '/' separated list into an array of
1030 name_compare_enties structures suitable for
1031 passing to is_in_path(). We do this for
1032 speed so we can pre-parse all the names in the list
1033 and don't do it for each call to is_in_path().
1034 We also check if the entry contains a wildcard to
1035 remove a potentially expensive call to mask_match
1036 if possible.
1037 ********************************************************************/
1038
1039 void set_namearray(name_compare_entry **ppname_array, const char *namelist_in)
1040 {
1041 char *name_end;
1042 char *namelist;
1043 char *namelist_end;
1044 char *nameptr;
1045 int num_entries = 0;
1046 int i;
1047
1048 (*ppname_array) = NULL;
1049
1050 if((namelist_in == NULL ) || ((namelist_in != NULL) && (*namelist_in == '\0')))
1051 return;
1052
1053 namelist = talloc_strdup(talloc_tos(), namelist_in);
1054 if (namelist == NULL) {
1055 DEBUG(0,("set_namearray: talloc fail\n"));
1056 return;
1057 }
1058 nameptr = namelist;
1059
1060 namelist_end = &namelist[strlen(namelist)];
1061
1062 /* We need to make two passes over the string. The
1063 first to count the number of elements, the second
1064 to split it.
1065 */
1066
1067 while(nameptr <= namelist_end) {
1068 if ( *nameptr == '/' ) {
1069 /* cope with multiple (useless) /s) */
1070 nameptr++;
1071 continue;
1072 }
1073 /* anything left? */
1074 if ( *nameptr == '\0' )
1075 break;
1076
1077 /* find the next '/' or consume remaining */
1078 name_end = strchr_m(nameptr, '/');
1079 if (name_end == NULL) {
1080 /* Point nameptr at the terminating '\0' */
1081 nameptr += strlen(nameptr);
1082 } else {
1083 /* next segment please */
1084 nameptr = name_end + 1;
1085 }
1086 num_entries++;
1087 }
1088
1089 if(num_entries == 0) {
1090 talloc_free(namelist);
1091 return;
1092 }
1093
1094 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1095 DEBUG(0,("set_namearray: malloc fail\n"));
1096 talloc_free(namelist);
1097 return;
1098 }
1099
1100 /* Now copy out the names */
1101 nameptr = namelist;
1102 i = 0;
1103 while(nameptr <= namelist_end) {
1104 if ( *nameptr == '/' ) {
1105 /* cope with multiple (useless) /s) */
1106 nameptr++;
1107 continue;
1108 }
1109 /* anything left? */
1110 if ( *nameptr == '\0' )
1111 break;
1112
1113 /* find the next '/' or consume remaining */
1114 name_end = strchr_m(nameptr, '/');
1115 if (name_end != NULL) {
1116 *name_end = '\0';
1117 }
1118
1119 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1120 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1121 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1122 talloc_free(namelist);
1123 return;
1124 }
1125
1126 if (name_end == NULL) {
1127 /* Point nameptr at the terminating '\0' */
1128 nameptr += strlen(nameptr);
1129 } else {
1130 /* next segment please */
1131 nameptr = name_end + 1;
1132 }
1133 i++;
1134 }
1135
1136 (*ppname_array)[i].name = NULL;
1137
1138 talloc_free(namelist);
1139 return;
1140 }
1141
1142 #undef DBGC_CLASS
1143 #define DBGC_CLASS DBGC_LOCKING
1144
1145 /****************************************************************************
1146 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1147 is dealt with in posix.c
1148 Returns True if we have information regarding this lock region (and returns
1149 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1150 ****************************************************************************/
1151
1152 bool fcntl_getlock(int fd, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
1153 {
1154 struct flock lock;
1155 int ret;
1156
1157 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1158 fd,(double)*poffset,(double)*pcount,*ptype));
1159
1160 lock.l_type = *ptype;
1161 lock.l_whence = SEEK_SET;
1162 lock.l_start = *poffset;
1163 lock.l_len = *pcount;
1164 lock.l_pid = 0;
1165
1166 ret = sys_fcntl_ptr(fd,F_GETLK,&lock);
1167
1168 if (ret == -1) {
1169 int sav = errno;
1170 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1171 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1172 errno = sav;
1173 return False;
1174 }
1175
1176 *ptype = lock.l_type;
1177 *poffset = lock.l_start;
1178 *pcount = lock.l_len;
1179 *ppid = lock.l_pid;
1180
1181 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1182 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1183 return True;
1184 }
1185
1186 #undef DBGC_CLASS
1187 #define DBGC_CLASS DBGC_ALL
1188
1189 /*******************************************************************
1190 Is the name specified one of my netbios names.
1191 Returns true if it is equal, false otherwise.
1192 ********************************************************************/
1193
1194 bool is_myname(const char *s)
1195 {
1196 int n;
1197 bool ret = False;
1198
1199 for (n=0; my_netbios_names(n); n++) {
1200 if (strequal(my_netbios_names(n), s)) {
1201 ret=True;
1202 break;
1203 }
1204 }
1205 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1206 return(ret);
1207 }
1208
1209 /*******************************************************************
1210 we distinguish between 2K and XP by the "Native Lan Manager" string
1211 WinXP => "Windows 2002 5.1"
1212 WinXP 64bit => "Windows XP 5.2"
1213 Win2k => "Windows 2000 5.0"
1214 NT4 => "Windows NT 4.0"
1215 Win9x => "Windows 4.0"
1216 Windows 2003 doesn't set the native lan manager string but
1217 they do set the domain to "Windows 2003 5.2" (probably a bug).
1218 ********************************************************************/
1219
1220 void ra_lanman_string( const char *native_lanman )
1221 {
1222 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1223 set_remote_arch( RA_WINXP );
1224 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1225 set_remote_arch( RA_WINXP64 );
1226 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1227 set_remote_arch( RA_WIN2K3 );
1228 }
1229
1230 static const char *remote_arch_str;
1231
1232 const char *get_remote_arch_str(void)
1233 {
1234 if (!remote_arch_str) {
1235 return "UNKNOWN";
1236 }
1237 return remote_arch_str;
1238 }
1239
1240 /*******************************************************************
1241 Set the horrid remote_arch string based on an enum.
1242 ********************************************************************/
1243
1244 void set_remote_arch(enum remote_arch_types type)
1245 {
1246 ra_type = type;
1247 switch( type ) {
1248 case RA_WFWG:
1249 remote_arch_str = "WfWg";
1250 break;
1251 case RA_OS2:
1252 remote_arch_str = "OS2";
1253 break;
1254 case RA_WIN95:
1255 remote_arch_str = "Win95";
1256 break;
1257 case RA_WINNT:
1258 remote_arch_str = "WinNT";
1259 break;
1260 case RA_WIN2K:
1261 remote_arch_str = "Win2K";
1262 break;
1263 case RA_WINXP:
1264 remote_arch_str = "WinXP";
1265 break;
1266 case RA_WINXP64:
1267 remote_arch_str = "WinXP64";
1268 break;
1269 case RA_WIN2K3:
1270 remote_arch_str = "Win2K3";
1271 break;
1272 case RA_VISTA:
1273 remote_arch_str = "Vista";
1274 break;
1275 case RA_SAMBA:
1276 remote_arch_str = "Samba";
1277 break;
1278 case RA_CIFSFS:
1279 remote_arch_str = "CIFSFS";
1280 break;
1281 case RA_OSX:
1282 remote_arch_str = "OSX";
1283 break;
1284 default:
1285 ra_type = RA_UNKNOWN;
1286 remote_arch_str = "UNKNOWN";
1287 break;
1288 }
1289
1290 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1291 remote_arch_str));
1292 }
1293
1294 /*******************************************************************
1295 Get the remote_arch type.
1296 ********************************************************************/
1297
1298 enum remote_arch_types get_remote_arch(void)
1299 {
1300 return ra_type;
1301 }
1302
1303 const char *tab_depth(int level, int depth)
1304 {
1305 if( CHECK_DEBUGLVL(level) ) {
1306 dbgtext("%*s", depth*4, "");
1307 }
1308 return "";
1309 }
1310
1311 /*****************************************************************************
1312 Provide a checksum on a string
1313
1314 Input: s - the null-terminated character string for which the checksum
1315 will be calculated.
1316
1317 Output: The checksum value calculated for s.
1318 *****************************************************************************/
1319
1320 int str_checksum(const char *s)
1321 {
1322 if (s == NULL)
1323 return 0;
1324 return hash(s, strlen(s), 0);
1325 }
1326
1327 /*****************************************************************
1328 Zero a memory area then free it. Used to catch bugs faster.
1329 *****************************************************************/
1330
1331 void zero_free(void *p, size_t size)
1332 {
1333 memset(p, 0, size);
1334 SAFE_FREE(p);
1335 }
1336
1337 /*****************************************************************
1338 Set our open file limit to a requested max and return the limit.
1339 *****************************************************************/
1340
1341 int set_maxfiles(int requested_max)
1342 {
1343 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1344 struct rlimit rlp;
1345 int saved_current_limit;
1346
1347 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1348 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1349 strerror(errno) ));
1350 /* just guess... */
1351 return requested_max;
1352 }
1353
1354 /*
1355 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1356 * account for the extra fd we need
1357 * as well as the log files and standard
1358 * handles etc. Save the limit we want to set in case
1359 * we are running on an OS that doesn't support this limit (AIX)
1360 * which always returns RLIM_INFINITY for rlp.rlim_max.
1361 */
1362
1363 /* Try raising the hard (max) limit to the requested amount. */
1364
1365 #if defined(RLIM_INFINITY)
1366 if (rlp.rlim_max != RLIM_INFINITY) {
1367 int orig_max = rlp.rlim_max;
1368
1369 if ( rlp.rlim_max < requested_max )
1370 rlp.rlim_max = requested_max;
1371
1372 /* This failing is not an error - many systems (Linux) don't
1373 support our default request of 10,000 open files. JRA. */
1374
1375 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1376 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
1377 (int)rlp.rlim_max, strerror(errno) ));
1378
1379 /* Set failed - restore original value from get. */
1380 rlp.rlim_max = orig_max;
1381 }
1382 }
1383 #endif
1384
1385 /* Now try setting the soft (current) limit. */
1386
1387 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
1388
1389 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1390 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
1391 (int)rlp.rlim_cur, strerror(errno) ));
1392 /* just guess... */
1393 return saved_current_limit;
1394 }
1395
1396 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1397 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
1398 strerror(errno) ));
1399 /* just guess... */
1400 return saved_current_limit;
1401 }
1402
1403 #if defined(RLIM_INFINITY)
1404 if(rlp.rlim_cur == RLIM_INFINITY)
1405 return saved_current_limit;
1406 #endif
1407
1408 if((int)rlp.rlim_cur > saved_current_limit)
1409 return saved_current_limit;
1410
1411 return rlp.rlim_cur;
1412 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
1413 /*
1414 * No way to know - just guess...
1415 */
1416 return requested_max;
1417 #endif
1418 }
1419
1420 /*****************************************************************
1421 malloc that aborts with smb_panic on fail or zero size.
1422 *****************************************************************/
1423
1424 void *smb_xmalloc_array(size_t size, unsigned int count)
1425 {
1426 void *p;
1427 if (size == 0) {
1428 smb_panic("smb_xmalloc_array: called with zero size");
1429 }
1430 if (count >= MAX_ALLOC_SIZE/size) {
1431 smb_panic("smb_xmalloc_array: alloc size too large");
1432 }
1433 if ((p = SMB_MALLOC(size*count)) == NULL) {
1434 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
1435 (unsigned long)size, (unsigned long)count));
1436 smb_panic("smb_xmalloc_array: malloc failed");
1437 }
1438 return p;
1439 }
1440
1441 /*
1442 vasprintf that aborts on malloc fail
1443 */
1444
1445 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
1446 {
1447 int n;
1448 va_list ap2;
1449
1450 va_copy(ap2, ap);
1451
1452 n = vasprintf(ptr, format, ap2);
1453 va_end(ap2);
1454 if (n == -1 || ! *ptr) {
1455 smb_panic("smb_xvasprintf: out of memory");
1456 }
1457 return n;
1458 }
1459
1460 /*****************************************************************
1461 Get local hostname and cache result.
1462 *****************************************************************/
1463
1464 char *myhostname(void)
1465 {
1466 static char *ret;
1467 if (ret == NULL) {
1468 ret = get_myname(NULL);
1469 }
1470 return ret;
1471 }
1472
1473 /*****************************************************************
1474 Get local hostname and cache result.
1475 *****************************************************************/
1476
1477 char *myhostname_upper(void)
1478 {
1479 static char *ret;
1480 if (ret == NULL) {
1481 char *name = get_myname(NULL);
1482 if (name == NULL) {
1483 return NULL;
1484 }
1485 ret = strupper_talloc(NULL, name);
1486 talloc_free(name);
1487 }
1488 return ret;
1489 }
1490
1491 /**
1492 * @brief Returns an absolute path to a file concatenating the provided
1493 * @a rootpath and @a basename
1494 *
1495 * @param name Filename, relative to @a rootpath
1496 *
1497 * @retval Pointer to a string containing the full path.
1498 **/
1499
1500 static char *xx_path(const char *name, const char *rootpath)
1501 {
1502 char *fname = NULL;
1503
1504 fname = talloc_strdup(talloc_tos(), rootpath);
1505 if (!fname) {
1506 return NULL;
1507 }
1508 trim_string(fname,"","/");
1509
1510 if (!directory_exist(fname)) {
1511 if (mkdir(fname,0755) == -1) {
1512 /* Did someone else win the race ? */
1513 if (errno != EEXIST) {
1514 DEBUG(1, ("Unable to create directory %s for file %s. "
1515 "Error was %s\n", fname, name, strerror(errno)));
1516 return NULL;
1517 }
1518 }
1519 }
1520
1521 return talloc_asprintf_append(fname, "/%s", name);
1522 }
1523
1524 /**
1525 * @brief Returns an absolute path to a file in the Samba lock directory.
1526 *
1527 * @param name File to find, relative to LOCKDIR.
1528 *
1529 * @retval Pointer to a talloc'ed string containing the full path.
1530 **/
1531
1532 char *lock_path(const char *name)
1533 {
1534 return xx_path(name, lp_lock_directory());
1535 }
1536
1537 /**
1538 * @brief Returns an absolute path to a file in the Samba state directory.
1539 *
1540 * @param name File to find, relative to STATEDIR.
1541 *
1542 * @retval Pointer to a talloc'ed string containing the full path.
1543 **/
1544
1545 char *state_path(const char *name)
1546 {
1547 return xx_path(name, lp_state_directory());
1548 }
1549
1550 /**
1551 * @brief Returns an absolute path to a file in the Samba cache directory.
1552 *
1553 * @param name File to find, relative to CACHEDIR.
1554 *
1555 * @retval Pointer to a talloc'ed string containing the full path.
1556 **/
1557
1558 char *cache_path(const char *name)
1559 {
1560 return xx_path(name, lp_cache_directory());
1561 }
1562
1563 /*******************************************************************
1564 Given a filename - get its directory name
1565 ********************************************************************/
1566
1567 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
1568 const char **name)
1569 {
1570 char *p;
1571 ptrdiff_t len;
1572
1573 p = strrchr_m(dir, '/'); /* Find final '/', if any */
1574
1575 if (p == NULL) {
1576 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
1577 return False;
1578 }
1579 if (name) {
1580 *name = dir;
1581 }
1582 return True;
1583 }
1584
1585 len = p-dir;
1586
1587 if (!(*parent = (char *)talloc_memdup(mem_ctx, dir, len+1))) {
1588 return False;
1589 }
1590 (*parent)[len] = '\0';
1591
1592 if (name) {
1593 *name = p+1;
1594 }
1595 return True;
1596 }
1597
1598 /*******************************************************************
1599 Determine if a pattern contains any Microsoft wildcard characters.
1600 *******************************************************************/
1601
1602 bool ms_has_wild(const char *s)
1603 {
1604 char c;
1605
1606 if (lp_posix_pathnames()) {
1607 /* With posix pathnames no characters are wild. */
1608 return False;
1609 }
1610
1611 while ((c = *s++)) {
1612 switch (c) {
1613 case '*':
1614 case '?':
1615 case '<':
1616 case '>':
1617 case '"':
1618 return True;
1619 }
1620 }
1621 return False;
1622 }
1623
1624 bool ms_has_wild_w(const smb_ucs2_t *s)
1625 {
1626 smb_ucs2_t c;
1627 if (!s) return False;
1628 while ((c = *s++)) {
1629 switch (c) {
1630 case UCS2_CHAR('*'):
1631 case UCS2_CHAR('?'):
1632 case UCS2_CHAR('<'):
1633 case UCS2_CHAR('>'):
1634 case UCS2_CHAR('"'):
1635 return True;
1636 }
1637 }
1638 return False;
1639 }
1640
1641 /*******************************************************************
1642 A wrapper that handles case sensitivity and the special handling
1643 of the ".." name.
1644 *******************************************************************/
1645
1646 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
1647 {
1648 if (ISDOTDOT(string))
1649 string = ".";
1650 if (ISDOT(pattern))
1651 return False;
1652
1653 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
1654 }
1655
1656 /*******************************************************************
1657 A wrapper that handles case sensitivity and the special handling
1658 of the ".." name. Varient that is only called by old search code which requires
1659 pattern translation.
1660 *******************************************************************/
1661
1662 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
1663 {
1664 if (ISDOTDOT(string))
1665 string = ".";
1666 if (ISDOT(pattern))
1667 return False;
1668
1669 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
1670 }
1671
1672 /*******************************************************************
1673 A wrapper that handles a list of patters and calls mask_match()
1674 on each. Returns True if any of the patterns match.
1675 *******************************************************************/
1676
1677 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
1678 {
1679 while (listLen-- > 0) {
1680 if (mask_match(string, *list++, is_case_sensitive))
1681 return True;
1682 }
1683 return False;
1684 }
1685
1686 /*********************************************************
1687 Recursive routine that is called by unix_wild_match.
1688 *********************************************************/
1689
1690 static bool unix_do_match(const char *regexp, const char *str)
1691 {
1692 const char *p;
1693
1694 for( p = regexp; *p && *str; ) {
1695
1696 switch(*p) {
1697 case '?':
1698 str++;
1699 p++;
1700 break;
1701
1702 case '*':
1703
1704 /*
1705 * Look for a character matching
1706 * the one after the '*'.
1707 */
1708 p++;
1709 if(!*p)
1710 return true; /* Automatic match */
1711 while(*str) {
1712
1713 while(*str && (*p != *str))
1714 str++;
1715
1716 /*
1717 * Patch from weidel@multichart.de. In the case of the regexp
1718 * '*XX*' we want to ensure there are at least 2 'X' characters
1719 * in the string after the '*' for a match to be made.
1720 */
1721
1722 {
1723 int matchcount=0;
1724
1725 /*
1726 * Eat all the characters that match, but count how many there were.
1727 */
1728
1729 while(*str && (*p == *str)) {
1730 str++;
1731 matchcount++;
1732 }
1733
1734 /*
1735 * Now check that if the regexp had n identical characters that
1736 * matchcount had at least that many matches.
1737 */
1738
1739 while ( *(p+1) && (*(p+1) == *p)) {
1740 p++;
1741 matchcount--;
1742 }
1743
1744 if ( matchcount <= 0 )
1745 return false;
1746 }
1747
1748 str--; /* We've eaten the match char after the '*' */
1749
1750 if(unix_do_match(p, str))
1751 return true;
1752
1753 if(!*str)
1754 return false;
1755 else
1756 str++;
1757 }
1758 return false;
1759
1760 default:
1761 if(*str != *p)
1762 return false;
1763 str++;
1764 p++;
1765 break;
1766 }
1767 }
1768
1769 if(!*p && !*str)
1770 return true;
1771
1772 if (!*p && str[0] == '.' && str[1] == 0)
1773 return true;
1774
1775 if (!*str && *p == '?') {
1776 while (*p == '?')
1777 p++;
1778 return(!*p);
1779 }
1780
1781 if(!*str && (*p == '*' && p[1] == '\0'))
1782 return true;
1783
1784 return false;
1785 }
1786
1787 /*******************************************************************
1788 Simple case insensitive interface to a UNIX wildcard matcher.
1789 Returns True if match, False if not.
1790 *******************************************************************/
1791
1792 bool unix_wild_match(const char *pattern, const char *string)
1793 {
1794 TALLOC_CTX *ctx = talloc_stackframe();
1795 char *p2;
1796 char *s2;
1797 char *p;
1798 bool ret = false;
1799
1800 p2 = talloc_strdup(ctx,pattern);
1801 s2 = talloc_strdup(ctx,string);
1802 if (!p2 || !s2) {
1803 TALLOC_FREE(ctx);
1804 return false;
1805 }
1806 if (!strlower_m(p2)) {
1807 TALLOC_FREE(ctx);
1808 return false;
1809 }
1810 if (!strlower_m(s2)) {
1811 TALLOC_FREE(ctx);
1812 return false;
1813 }
1814
1815 /* Remove any *? and ** from the pattern as they are meaningless */
1816 for(p = p2; *p; p++) {
1817 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
1818 memmove(&p[1], &p[2], strlen(&p[2])+1);
1819 }
1820 }
1821
1822 if (strequal(p2,"*")) {
1823 TALLOC_FREE(ctx);
1824 return true;
1825 }
1826
1827 ret = unix_do_match(p2, s2);
1828 TALLOC_FREE(ctx);
1829 return ret;
1830 }
1831
1832 /**********************************************************************
1833 Converts a name to a fully qualified domain name.
1834 Returns true if lookup succeeded, false if not (then fqdn is set to name)
1835 Note we deliberately use gethostbyname here, not getaddrinfo as we want
1836 to examine the h_aliases and I don't know how to do that with getaddrinfo.
1837 ***********************************************************************/
1838
1839 bool name_to_fqdn(fstring fqdn, const char *name)
1840 {
1841 char *full = NULL;
1842 struct hostent *hp = gethostbyname(name);
1843
1844 if (!hp || !hp->h_name || !*hp->h_name) {
1845 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
1846 fstrcpy(fqdn, name);
1847 return false;
1848 }
1849
1850 /* Find out if the fqdn is returned as an alias
1851 * to cope with /etc/hosts files where the first
1852 * name is not the fqdn but the short name */
1853 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
1854 int i;
1855 for (i = 0; hp->h_aliases[i]; i++) {
1856 if (strchr_m(hp->h_aliases[i], '.')) {
1857 full = hp->h_aliases[i];
1858 break;
1859 }
1860 }
1861 }
1862 if (full && (strcasecmp_m(full, "localhost.localdomain") == 0)) {
1863 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
1864 DEBUGADD(1, (" Specifying the machine hostname for address 127.0.0.1 may lead\n"));
1865 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
1866 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
1867 full = hp->h_name;
1868 }
1869 if (!full) {
1870 full = hp->h_name;
1871 }
1872
1873 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
1874 fstrcpy(fqdn, full);
1875 return true;
1876 }
1877
1878 /**********************************************************************
1879 Append a DATA_BLOB to a talloc'ed object
1880 ***********************************************************************/
1881
1882 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
1883 {
1884 size_t old_size = 0;
1885 char *result;
1886
1887 if (blob.length == 0) {
1888 return buf;
1889 }
1890
1891 if (buf != NULL) {
1892 old_size = talloc_get_size(buf);
1893 }
1894
1895 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
1896 if (result == NULL) {
1897 return NULL;
1898 }
1899
1900 memcpy(result + old_size, blob.data, blob.length);
1901 return result;
1902 }
1903
1904 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
1905 {
1906 switch (share_access & ~FILE_SHARE_DELETE) {
1907 case FILE_SHARE_NONE:
1908 return DENY_ALL;
1909 case FILE_SHARE_READ:
1910 return DENY_WRITE;
1911 case FILE_SHARE_WRITE:
1912 return DENY_READ;
1913 case FILE_SHARE_READ|FILE_SHARE_WRITE:
1914 return DENY_NONE;
1915 }
1916 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
1917 return DENY_DOS;
1918 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
1919 return DENY_FCB;
1920 }
1921
1922 return (uint32)-1;
1923 }
1924
1925 pid_t procid_to_pid(const struct server_id *proc)
1926 {
1927 return proc->pid;
1928 }
1929
1930 static uint32 my_vnn = NONCLUSTER_VNN;
1931
1932 void set_my_vnn(uint32 vnn)
1933 {
1934 DEBUG(10, ("vnn pid %d = %u\n", (int)getpid(), (unsigned int)vnn));
1935 my_vnn = vnn;
1936 }
1937
1938 uint32 get_my_vnn(void)
1939 {
1940 return my_vnn;
1941 }
1942
1943 static uint64_t my_unique_id = 0;
1944
1945 void set_my_unique_id(uint64_t unique_id)
1946 {
1947 my_unique_id = unique_id;
1948 }
1949
1950 struct server_id pid_to_procid(pid_t pid)
1951 {
1952 struct server_id result;
1953 result.pid = pid;
1954 result.task_id = 0;
1955 result.unique_id = my_unique_id;
1956 result.vnn = my_vnn;
1957 return result;
1958 }
1959
1960 struct server_id procid_self(void)
1961 {
1962 return pid_to_procid(getpid());
1963 }
1964
1965 bool procid_is_me(const struct server_id *pid)
1966 {
1967 if (pid->pid != getpid())
1968 return False;
1969 if (pid->task_id != 0)
1970 return False;
1971 if (pid->vnn != my_vnn)
1972 return False;
1973 return True;
1974 }
1975
1976 struct server_id interpret_pid(const char *pid_string)
1977 {
1978 return server_id_from_string(get_my_vnn(), pid_string);
1979 }
1980
1981 char *procid_str_static(const struct server_id *pid)
1982 {
1983 return server_id_str(talloc_tos(), pid);
1984 }
1985
1986 bool procid_valid(const struct server_id *pid)
1987 {
1988 return (pid->pid != (uint64_t)-1);
1989 }
1990
1991 bool procid_is_local(const struct server_id *pid)
1992 {
1993 return pid->vnn == my_vnn;
1994 }
1995
1996 /****************************************************************
1997 Check if an offset into a buffer is safe.
1998 If this returns True it's safe to indirect into the byte at
1999 pointer ptr+off.
2000 ****************************************************************/
2001
2002 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2003 {
2004 const char *end_base = buf_base + buf_len;
2005 char *end_ptr = ptr + off;
2006
2007 if (!buf_base || !ptr) {
2008 return False;
2009 }
2010
2011 if (end_base < buf_base || end_ptr < ptr) {
2012 return False; /* wrap. */
2013 }
2014
2015 if (end_ptr < end_base) {
2016 return True;
2017 }
2018 return False;
2019 }
2020
2021 /****************************************************************
2022 Return a safe pointer into a buffer, or NULL.
2023 ****************************************************************/
2024
2025 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2026 {
2027 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2028 ptr + off : NULL;
2029 }
2030
2031 /****************************************************************
2032 Return a safe pointer into a string within a buffer, or NULL.
2033 ****************************************************************/
2034
2035 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2036 {
2037 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2038 return NULL;
2039 }
2040 /* Check if a valid string exists at this offset. */
2041 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2042 return NULL;
2043 }
2044 return ptr + off;
2045 }
2046
2047 /****************************************************************
2048 Return an SVAL at a pointer, or failval if beyond the end.
2049 ****************************************************************/
2050
2051 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2052 {
2053 /*
2054 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2055 * NOT ptr[2].
2056 */
2057 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2058 return failval;
2059 }
2060 return SVAL(ptr,off);
2061 }
2062
2063 /****************************************************************
2064 Return an IVAL at a pointer, or failval if beyond the end.
2065 ****************************************************************/
2066
2067 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2068 {
2069 /*
2070 * Note we use off+3 here, not off+4 as IVAL accesses
2071 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2072 */
2073 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2074 return failval;
2075 }
2076 return IVAL(ptr,off);
2077 }
2078
2079 /****************************************************************
2080 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2081 call (they take care of winbind separator and other winbind specific settings).
2082 ****************************************************************/
2083
2084 void split_domain_user(TALLOC_CTX *mem_ctx,
2085 const char *full_name,
2086 char **domain,
2087 char **user)
2088 {
2089 const char *p = NULL;
2090
2091 p = strchr_m(full_name, '\\');
2092
2093 if (p != NULL) {
2094 *domain = talloc_strndup(mem_ctx, full_name,
2095 PTR_DIFF(p, full_name));
2096 *user = talloc_strdup(mem_ctx, p+1);
2097 } else {
2098 *domain = talloc_strdup(mem_ctx, "");
2099 *user = talloc_strdup(mem_ctx, full_name);
2100 }
2101 }
2102
2103 /****************************************************************
2104 strip off leading '\\' from a hostname
2105 ****************************************************************/
2106
2107 const char *strip_hostname(const char *s)
2108 {
2109 if (!s) {
2110 return NULL;
2111 }
2112
2113 if (strlen_m(s) < 3) {
2114 return s;
2115 }
2116
2117 if (s[0] == '\\') s++;
2118 if (s[0] == '\\') s++;
2119
2120 return s;
2121 }
2122
2123 bool any_nt_status_not_ok(NTSTATUS err1, NTSTATUS err2, NTSTATUS *result)
2124 {
2125 if (!NT_STATUS_IS_OK(err1)) {
2126 *result = err1;
2127 return true;
2128 }
2129 if (!NT_STATUS_IS_OK(err2)) {
2130 *result = err2;
2131 return true;
2132 }
2133 return false;
2134 }
2135
2136 int timeval_to_msec(struct timeval t)
2137 {
2138 return t.tv_sec * 1000 + (t.tv_usec+999) / 1000;
2139 }
2140
2141 /*******************************************************************
2142 Check a given DOS pathname is valid for a share.
2143 ********************************************************************/
2144
2145 char *valid_share_pathname(TALLOC_CTX *ctx, const char *dos_pathname)
2146 {
2147 char *ptr = NULL;
2148
2149 if (!dos_pathname) {
2150 return NULL;
2151 }
2152
2153 ptr = talloc_strdup(ctx, dos_pathname);
2154 if (!ptr) {
2155 return NULL;
2156 }
2157 /* Convert any '\' paths to '/' */
2158 unix_format(ptr);
2159 ptr = unix_clean_name(ctx, ptr);
2160 if (!ptr) {
2161 return NULL;
2162 }
2163
2164 /* NT is braindead - it wants a C: prefix to a pathname ! So strip it. */
2165 if (strlen(ptr) > 2 && ptr[1] == ':' && ptr[0] != '/')
2166 ptr += 2;
2167
2168 /* Only absolute paths allowed. */
2169 if (*ptr != '/')
2170 return NULL;
2171
2172 return ptr;
2173 }
2174
2175 /*******************************************************************
2176 Return True if the filename is one of the special executable types.
2177 ********************************************************************/
2178
2179 bool is_executable(const char *fname)
2180 {
2181 if ((fname = strrchr_m(fname,'.'))) {
2182 if (strequal(fname,".com") ||
2183 strequal(fname,".dll") ||
2184 strequal(fname,".exe") ||
2185 strequal(fname,".sym")) {
2186 return True;
2187 }
2188 }
2189 return False;
2190 }
2191
2192 /****************************************************************************
2193 Open a file with a share mode - old openX method - map into NTCreate.
2194 ****************************************************************************/
2195
2196 bool map_open_params_to_ntcreate(const char *smb_base_fname,
2197 int deny_mode, int open_func,
2198 uint32 *paccess_mask,
2199 uint32 *pshare_mode,
2200 uint32 *pcreate_disposition,
2201 uint32 *pcreate_options,
2202 uint32_t *pprivate_flags)
2203 {
2204 uint32 access_mask;
2205 uint32 share_mode;
2206 uint32 create_disposition;
2207 uint32 create_options = FILE_NON_DIRECTORY_FILE;
2208 uint32_t private_flags = 0;
2209
2210 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
2211 "open_func = 0x%x\n",
2212 smb_base_fname, (unsigned int)deny_mode,
2213 (unsigned int)open_func ));
2214
2215 /* Create the NT compatible access_mask. */
2216 switch (GET_OPENX_MODE(deny_mode)) {
2217 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
2218 case DOS_OPEN_RDONLY:
2219 access_mask = FILE_GENERIC_READ;
2220 break;
2221 case DOS_OPEN_WRONLY:
2222 access_mask = FILE_GENERIC_WRITE;
2223 break;
2224 case DOS_OPEN_RDWR:
2225 case DOS_OPEN_FCB:
2226 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
2227 break;
2228 default:
2229 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
2230 (unsigned int)GET_OPENX_MODE(deny_mode)));
2231 return False;
2232 }
2233
2234 /* Create the NT compatible create_disposition. */
2235 switch (open_func) {
2236 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
2237 create_disposition = FILE_CREATE;
2238 break;
2239
2240 case OPENX_FILE_EXISTS_OPEN:
2241 create_disposition = FILE_OPEN;
2242 break;
2243
2244 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
2245 create_disposition = FILE_OPEN_IF;
2246 break;
2247
2248 case OPENX_FILE_EXISTS_TRUNCATE:
2249 create_disposition = FILE_OVERWRITE;
2250 break;
2251
2252 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
2253 create_disposition = FILE_OVERWRITE_IF;
2254 break;
2255
2256 default:
2257 /* From samba4 - to be confirmed. */
2258 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
2259 create_disposition = FILE_CREATE;
2260 break;
2261 }
2262 DEBUG(10,("map_open_params_to_ntcreate: bad "
2263 "open_func 0x%x\n", (unsigned int)open_func));
2264 return False;
2265 }
2266
2267 /* Create the NT compatible share modes. */
2268 switch (GET_DENY_MODE(deny_mode)) {
2269 case DENY_ALL:
2270 share_mode = FILE_SHARE_NONE;
2271 break;
2272
2273 case DENY_WRITE:
2274 share_mode = FILE_SHARE_READ;
2275 break;
2276
2277 case DENY_READ:
2278 share_mode = FILE_SHARE_WRITE;
2279 break;
2280
2281 case DENY_NONE:
2282 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
2283 break;
2284
2285 case DENY_DOS:
2286 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
2287 if (is_executable(smb_base_fname)) {
2288 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
2289 } else {
2290 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
2291 share_mode = FILE_SHARE_READ;
2292 } else {
2293 share_mode = FILE_SHARE_NONE;
2294 }
2295 }
2296 break;
2297
2298 case DENY_FCB:
2299 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
2300 share_mode = FILE_SHARE_NONE;
2301 break;
2302
2303 default:
2304 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
2305 (unsigned int)GET_DENY_MODE(deny_mode) ));
2306 return False;
2307 }
2308
2309 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
2310 "share_mode = 0x%x, create_disposition = 0x%x, "
2311 "create_options = 0x%x private_flags = 0x%x\n",
2312 smb_base_fname,
2313 (unsigned int)access_mask,
2314 (unsigned int)share_mode,
2315 (unsigned int)create_disposition,
2316 (unsigned int)create_options,
2317 (unsigned int)private_flags));
2318
2319 if (paccess_mask) {
2320 *paccess_mask = access_mask;
2321 }
2322 if (pshare_mode) {
2323 *pshare_mode = share_mode;
2324 }
2325 if (pcreate_disposition) {
2326 *pcreate_disposition = create_disposition;
2327 }
2328 if (pcreate_options) {
2329 *pcreate_options = create_options;
2330 }
2331 if (pprivate_flags) {
2332 *pprivate_flags = private_flags;
2333 }
2334
2335 return True;
2336
2337 }
2338
2339 /*************************************************************************
2340 Return a talloced copy of a struct security_unix_token. NULL on fail.
2341 *************************************************************************/
2342
2343 struct security_unix_token *copy_unix_token(TALLOC_CTX *ctx, const struct security_unix_token *tok)
2344 {
2345 struct security_unix_token *cpy;
2346
2347 cpy = talloc(ctx, struct security_unix_token);
2348 if (!cpy) {
2349 return NULL;
2350 }
2351
2352 cpy->uid = tok->uid;
2353 cpy->gid = tok->gid;
2354 cpy->ngroups = tok->ngroups;
2355 if (tok->ngroups) {
2356 /* Make this a talloc child of cpy. */
2357 cpy->groups = (gid_t *)talloc_memdup(
2358 cpy, tok->groups, tok->ngroups * sizeof(gid_t));
2359 if (!cpy->groups) {
2360 TALLOC_FREE(cpy);
2361 return NULL;
2362 }
2363 } else {
2364 cpy->groups = NULL;
2365 }
2366 return cpy;
2367 }
2368
2369 /****************************************************************************
2370 Check that a file matches a particular file type.
2371 ****************************************************************************/
2372
2373 bool dir_check_ftype(uint32_t mode, uint32_t dirtype)
2374 {
2375 uint32_t mask;
2376
2377 /* Check the "may have" search bits. */
2378 if (((mode & ~dirtype) &
2379 (FILE_ATTRIBUTE_HIDDEN |
2380 FILE_ATTRIBUTE_SYSTEM |
2381 FILE_ATTRIBUTE_DIRECTORY)) != 0) {
2382 return false;
2383 }
2384
2385 /* Check the "must have" bits,
2386 which are the may have bits shifted eight */
2387 /* If must have bit is set, the file/dir can
2388 not be returned in search unless the matching
2389 file attribute is set */
2390 mask = ((dirtype >> 8) & (FILE_ATTRIBUTE_DIRECTORY|
2391 FILE_ATTRIBUTE_ARCHIVE|
2392 FILE_ATTRIBUTE_READONLY|
2393 FILE_ATTRIBUTE_HIDDEN|
2394 FILE_ATTRIBUTE_SYSTEM)); /* & 0x37 */
2395 if(mask) {
2396 if((mask & (mode & (FILE_ATTRIBUTE_DIRECTORY|
2397 FILE_ATTRIBUTE_ARCHIVE|
2398 FILE_ATTRIBUTE_READONLY|
2399 FILE_ATTRIBUTE_HIDDEN|
2400 FILE_ATTRIBUTE_SYSTEM))) == mask) {
2401 /* check if matching attribute present */
2402 return true;
2403 } else {
2404 return false;
2405 }
2406 }
2407
2408 return true;
2409 }
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