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smbd: Fix CID 1035536 Uninitialized pointer read
[Samba.git] / source3 / lib / util.c
blob93aab3c2ad8a85b288ff87994f09608b543b3ee3
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
35 #ifdef HAVE_SYS_PRCTL_H
36 #include <sys/prctl.h>
37 #endif
38
39 /* Max allowable allococation - 256mb - 0x10000000 */
40 #define MAX_ALLOC_SIZE (1024*1024*256)
41
42 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
43 #ifdef WITH_NISPLUS_HOME
44 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
45 /*
46 * The following lines are needed due to buggy include files
47 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
48 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
49 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
50 * an enum in /usr/include/rpcsvc/nis.h.
51 */
52
53 #if defined(GROUP)
54 #undef GROUP
55 #endif
56
57 #if defined(GROUP_OBJ)
58 #undef GROUP_OBJ
59 #endif
60
61 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
62
63 #include <rpcsvc/nis.h>
64
65 #endif /* WITH_NISPLUS_HOME */
66 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
67
68 static enum protocol_types Protocol = PROTOCOL_COREPLUS;
69
70 enum protocol_types get_Protocol(void)
71 {
72 return Protocol;
73 }
74
75 void set_Protocol(enum protocol_types p)
76 {
77 Protocol = p;
78 }
79
80 static enum remote_arch_types ra_type = RA_UNKNOWN;
81
82 void gfree_all( void )
83 {
84 gfree_names();
85 gfree_loadparm();
86 gfree_charcnv();
87 gfree_interfaces();
88 gfree_debugsyms();
89 }
90
91 /*******************************************************************
92 Check if a file exists - call vfs_file_exist for samba files.
93 ********************************************************************/
94
95 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf,
96 bool fake_dir_create_times)
97 {
98 SMB_STRUCT_STAT st;
99 if (!sbuf)
100 sbuf = &st;
101
102 if (sys_stat(fname, sbuf, fake_dir_create_times) != 0)
103 return(False);
104
105 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
106 }
107
108 /*******************************************************************
109 Check if a unix domain socket exists - call vfs_file_exist for samba files.
110 ********************************************************************/
111
112 bool socket_exist(const char *fname)
113 {
114 SMB_STRUCT_STAT st;
115 if (sys_stat(fname, &st, false) != 0)
116 return(False);
117
118 return S_ISSOCK(st.st_ex_mode);
119 }
120
121 /*******************************************************************
122 Returns the size in bytes of the named given the stat struct.
123 ********************************************************************/
124
125 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
126 {
127 return sbuf->st_ex_size;
128 }
129
130 /****************************************************************************
131 Check two stats have identical dev and ino fields.
132 ****************************************************************************/
133
134 bool check_same_dev_ino(const SMB_STRUCT_STAT *sbuf1,
135 const SMB_STRUCT_STAT *sbuf2)
136 {
137 if (sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
138 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
139 return false;
140 }
141 return true;
142 }
143
144 /****************************************************************************
145 Check if a stat struct is identical for use.
146 ****************************************************************************/
147
148 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
149 const SMB_STRUCT_STAT *sbuf2)
150 {
151 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
152 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
153 !check_same_dev_ino(sbuf1, sbuf2)) {
154 return false;
155 }
156 return true;
157 }
158
159 /*******************************************************************
160 Show a smb message structure.
161 ********************************************************************/
162
163 void show_msg(const char *buf)
164 {
165 int i;
166 int bcc=0;
167
168 if (!DEBUGLVL(5))
169 return;
170
171 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
172 smb_len(buf),
173 (int)CVAL(buf,smb_com),
174 (int)CVAL(buf,smb_rcls),
175 (int)CVAL(buf,smb_reh),
176 (int)SVAL(buf,smb_err),
177 (int)CVAL(buf,smb_flg),
178 (int)SVAL(buf,smb_flg2)));
179 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
180 (int)SVAL(buf,smb_tid),
181 (int)SVAL(buf,smb_pid),
182 (int)SVAL(buf,smb_uid),
183 (int)SVAL(buf,smb_mid)));
184 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
185
186 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
187 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
188 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
189
190 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
191
192 DEBUGADD(5,("smb_bcc=%d\n",bcc));
193
194 if (DEBUGLEVEL < 10)
195 return;
196
197 if (DEBUGLEVEL < 50)
198 bcc = MIN(bcc, 512);
199
200 dump_data(10, (const uint8 *)smb_buf_const(buf), bcc);
201 }
202
203 /*******************************************************************
204 Setup only the byte count for a smb message.
205 ********************************************************************/
206
207 int set_message_bcc(char *buf,int num_bytes)
208 {
209 int num_words = CVAL(buf,smb_wct);
210 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
211 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
212 return (smb_size + num_words*2 + num_bytes);
213 }
214
215 /*******************************************************************
216 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
217 Return the bytes added
218 ********************************************************************/
219
220 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
221 {
222 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
223 uint8 *tmp;
224
225 if (!(tmp = talloc_realloc(NULL, *outbuf, uint8, newlen))) {
226 DEBUG(0, ("talloc failed\n"));
227 return -1;
228 }
229 *outbuf = tmp;
230
231 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
232 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
233 return blob.length;
234 }
235
236 /*******************************************************************
237 Reduce a file name, removing .. elements.
238 ********************************************************************/
239
240 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
241 {
242 char *p = NULL;
243 char *str = NULL;
244
245 DEBUG(3,("dos_clean_name [%s]\n",s));
246
247 /* remove any double slashes */
248 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
249 if (!str) {
250 return NULL;
251 }
252
253 /* Remove leading .\\ characters */
254 if(strncmp(str, ".\\", 2) == 0) {
255 trim_string(str, ".\\", NULL);
256 if(*str == 0) {
257 str = talloc_strdup(ctx, ".\\");
258 if (!str) {
259 return NULL;
260 }
261 }
262 }
263
264 while ((p = strstr_m(str,"\\..\\")) != NULL) {
265 char *s1;
266
267 *p = 0;
268 s1 = p+3;
269
270 if ((p=strrchr_m(str,'\\')) != NULL) {
271 *p = 0;
272 } else {
273 *str = 0;
274 }
275 str = talloc_asprintf(ctx,
276 "%s%s",
277 str,
278 s1);
279 if (!str) {
280 return NULL;
281 }
282 }
283
284 trim_string(str,NULL,"\\..");
285 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
286 }
287
288 /*******************************************************************
289 Reduce a file name, removing .. elements.
290 ********************************************************************/
291
292 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
293 {
294 char *p = NULL;
295 char *str = NULL;
296
297 DEBUG(3,("unix_clean_name [%s]\n",s));
298
299 /* remove any double slashes */
300 str = talloc_all_string_sub(ctx, s, "//","/");
301 if (!str) {
302 return NULL;
303 }
304
305 /* Remove leading ./ characters */
306 if(strncmp(str, "./", 2) == 0) {
307 trim_string(str, "./", NULL);
308 if(*str == 0) {
309 str = talloc_strdup(ctx, "./");
310 if (!str) {
311 return NULL;
312 }
313 }
314 }
315
316 while ((p = strstr_m(str,"/../")) != NULL) {
317 char *s1;
318
319 *p = 0;
320 s1 = p+3;
321
322 if ((p=strrchr_m(str,'/')) != NULL) {
323 *p = 0;
324 } else {
325 *str = 0;
326 }
327 str = talloc_asprintf(ctx,
328 "%s%s",
329 str,
330 s1);
331 if (!str) {
332 return NULL;
333 }
334 }
335
336 trim_string(str,NULL,"/..");
337 return talloc_all_string_sub(ctx, str, "/./", "/");
338 }
339
340 char *clean_name(TALLOC_CTX *ctx, const char *s)
341 {
342 char *str = dos_clean_name(ctx, s);
343 if (!str) {
344 return NULL;
345 }
346 return unix_clean_name(ctx, str);
347 }
348
349 /*******************************************************************
350 Write data into an fd at a given offset. Ignore seek errors.
351 ********************************************************************/
352
353 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, off_t pos)
354 {
355 size_t total=0;
356 ssize_t ret;
357
358 if (pos == (off_t)-1) {
359 return write_data(fd, buffer, N);
360 }
361 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
362 while (total < N) {
363 ret = sys_pwrite(fd,buffer + total,N - total, pos);
364 if (ret == -1 && errno == ESPIPE) {
365 return write_data(fd, buffer + total,N - total);
366 }
367 if (ret == -1) {
368 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
369 return -1;
370 }
371 if (ret == 0) {
372 return total;
373 }
374 total += ret;
375 pos += ret;
376 }
377 return (ssize_t)total;
378 #else
379 /* Use lseek and write_data. */
380 if (lseek(fd, pos, SEEK_SET) == -1) {
381 if (errno != ESPIPE) {
382 return -1;
383 }
384 }
385 return write_data(fd, buffer, N);
386 #endif
387 }
388
389 static int reinit_after_fork_pipe[2] = { -1, -1 };
390
391 NTSTATUS init_before_fork(void)
392 {
393 int ret;
394
395 ret = pipe(reinit_after_fork_pipe);
396 if (ret == -1) {
397 NTSTATUS status;
398
399 status = map_nt_error_from_unix_common(errno);
400
401 DEBUG(0, ("Error creating child_pipe: %s\n",
402 nt_errstr(status)));
403
404 return status;
405 }
406
407 return NT_STATUS_OK;
408 }
409
410 /**
411 * Detect died parent by detecting EOF on the pipe
412 */
413 static void reinit_after_fork_pipe_handler(struct tevent_context *ev,
414 struct tevent_fd *fde,
415 uint16_t flags,
416 void *private_data)
417 {
418 char c;
419
420 if (sys_read(reinit_after_fork_pipe[0], &c, 1) != 1) {
421 /*
422 * we have reached EOF on stdin, which means the
423 * parent has exited. Shutdown the server
424 */
425 (void)kill(getpid(), SIGTERM);
426 }
427 }
428
429
430 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
431 struct tevent_context *ev_ctx,
432 bool parent_longlived)
433 {
434 NTSTATUS status = NT_STATUS_OK;
435
436 if (reinit_after_fork_pipe[1] != -1) {
437 close(reinit_after_fork_pipe[1]);
438 reinit_after_fork_pipe[1] = -1;
439 }
440
441 /* Reset the state of the random
442 * number generation system, so
443 * children do not get the same random
444 * numbers as each other */
445 set_need_random_reseed();
446
447 /* tdb needs special fork handling */
448 if (tdb_reopen_all(parent_longlived ? 1 : 0) != 0) {
449 DEBUG(0,("tdb_reopen_all failed.\n"));
450 status = NT_STATUS_OPEN_FAILED;
451 goto done;
452 }
453
454 if (ev_ctx && tevent_re_initialise(ev_ctx) != 0) {
455 smb_panic(__location__ ": Failed to re-initialise event context");
456 }
457
458 if (reinit_after_fork_pipe[0] != -1) {
459 struct tevent_fd *fde;
460
461 fde = tevent_add_fd(ev_ctx, ev_ctx /* TALLOC_CTX */,
462 reinit_after_fork_pipe[0], TEVENT_FD_READ,
463 reinit_after_fork_pipe_handler, NULL);
464 if (fde == NULL) {
465 smb_panic(__location__ ": Failed to add reinit_after_fork pipe event");
466 }
467 }
468
469 if (msg_ctx) {
470 /*
471 * For clustering, we need to re-init our ctdbd connection after the
472 * fork
473 */
474 status = messaging_reinit(msg_ctx);
475 if (!NT_STATUS_IS_OK(status)) {
476 DEBUG(0,("messaging_reinit() failed: %s\n",
477 nt_errstr(status)));
478 }
479 }
480 done:
481 return status;
482 }
483
484 /****************************************************************************
485 (Hopefully) efficient array append.
486 ****************************************************************************/
487
488 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
489 void *element, void *_array, uint32 *num_elements,
490 ssize_t *array_size)
491 {
492 void **array = (void **)_array;
493
494 if (*array_size < 0) {
495 return;
496 }
497
498 if (*array == NULL) {
499 if (*array_size == 0) {
500 *array_size = 128;
501 }
502
503 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
504 goto error;
505 }
506
507 *array = TALLOC(mem_ctx, element_size * (*array_size));
508 if (*array == NULL) {
509 goto error;
510 }
511 }
512
513 if (*num_elements == *array_size) {
514 *array_size *= 2;
515
516 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
517 goto error;
518 }
519
520 *array = TALLOC_REALLOC(mem_ctx, *array,
521 element_size * (*array_size));
522
523 if (*array == NULL) {
524 goto error;
525 }
526 }
527
528 memcpy((char *)(*array) + element_size*(*num_elements),
529 element, element_size);
530 *num_elements += 1;
531
532 return;
533
534 error:
535 *num_elements = 0;
536 *array_size = -1;
537 }
538
539 /****************************************************************************
540 Get my own domain name, or "" if we have none.
541 ****************************************************************************/
542
543 char *get_mydnsdomname(TALLOC_CTX *ctx)
544 {
545 const char *domname;
546 char *p;
547
548 domname = get_mydnsfullname();
549 if (!domname) {
550 return NULL;
551 }
552
553 p = strchr_m(domname, '.');
554 if (p) {
555 p++;
556 return talloc_strdup(ctx, p);
557 } else {
558 return talloc_strdup(ctx, "");
559 }
560 }
561
562 /****************************************************************************
563 Interpret a protocol description string, with a default.
564 ****************************************************************************/
565
566 int interpret_protocol(const char *str,int def)
567 {
568 if (strequal(str,"NT1"))
569 return(PROTOCOL_NT1);
570 if (strequal(str,"LANMAN2"))
571 return(PROTOCOL_LANMAN2);
572 if (strequal(str,"LANMAN1"))
573 return(PROTOCOL_LANMAN1);
574 if (strequal(str,"CORE"))
575 return(PROTOCOL_CORE);
576 if (strequal(str,"COREPLUS"))
577 return(PROTOCOL_COREPLUS);
578 if (strequal(str,"CORE+"))
579 return(PROTOCOL_COREPLUS);
580
581 DEBUG(0,("Unrecognised protocol level %s\n",str));
582
583 return(def);
584 }
585
586
587 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
588 /******************************************************************
589 Remove any mount options such as -rsize=2048,wsize=2048 etc.
590 Based on a fix from <Thomas.Hepper@icem.de>.
591 Returns a malloc'ed string.
592 *******************************************************************/
593
594 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
595 {
596 if (*str == '-') {
597 const char *p = str;
598 while(*p && !isspace(*p))
599 p++;
600 while(*p && isspace(*p))
601 p++;
602 if(*p) {
603 return talloc_strdup(ctx, p);
604 }
605 }
606 return NULL;
607 }
608
609 /*******************************************************************
610 Patch from jkf@soton.ac.uk
611 Split Luke's automount_server into YP lookup and string splitter
612 so can easily implement automount_path().
613 Returns a malloc'ed string.
614 *******************************************************************/
615
616 #ifdef WITH_NISPLUS_HOME
617 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
618 {
619 char *value = NULL;
620
621 char *nis_map = (char *)lp_nis_home_map_name();
622
623 char buffer[NIS_MAXATTRVAL + 1];
624 nis_result *result;
625 nis_object *object;
626 entry_obj *entry;
627
628 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
629 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
630
631 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
632 if (result->status != NIS_SUCCESS) {
633 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
634 } else {
635 object = result->objects.objects_val;
636 if (object->zo_data.zo_type == ENTRY_OBJ) {
637 entry = &object->zo_data.objdata_u.en_data;
638 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
639 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
640
641 value = talloc_strdup(ctx,
642 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
643 if (!value) {
644 nis_freeresult(result);
645 return NULL;
646 }
647 value = talloc_string_sub(ctx,
648 value,
649 "&",
650 user_name);
651 }
652 }
653 }
654 nis_freeresult(result);
655
656 if (value) {
657 value = strip_mount_options(ctx, value);
658 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
659 user_name, value));
660 }
661 return value;
662 }
663 #else /* WITH_NISPLUS_HOME */
664
665 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
666 {
667 char *value = NULL;
668
669 int nis_error; /* returned by yp all functions */
670 char *nis_result; /* yp_match inits this */
671 int nis_result_len; /* and set this */
672 char *nis_domain; /* yp_get_default_domain inits this */
673 char *nis_map = lp_nis_home_map_name(talloc_tos());
674
675 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
676 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
677 return NULL;
678 }
679
680 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
681
682 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
683 strlen(user_name), &nis_result,
684 &nis_result_len)) == 0) {
685 if (nis_result_len > 0 && nis_result[nis_result_len] == '\n') {
686 nis_result[nis_result_len] = '\0';
687 }
688 value = talloc_strdup(ctx, nis_result);
689 if (!value) {
690 return NULL;
691 }
692 value = strip_mount_options(ctx, value);
693 } else if(nis_error == YPERR_KEY) {
694 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
695 user_name, nis_map));
696 DEBUG(3, ("using defaults for server and home directory\n"));
697 } else {
698 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
699 yperr_string(nis_error), user_name, nis_map));
700 }
701
702 if (value) {
703 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
704 }
705 return value;
706 }
707 #endif /* WITH_NISPLUS_HOME */
708 #endif
709
710 bool process_exists(const struct server_id pid)
711 {
712 return serverid_exists(&pid);
713 }
714
715 /*******************************************************************
716 Convert a uid into a user name.
717 ********************************************************************/
718
719 const char *uidtoname(uid_t uid)
720 {
721 TALLOC_CTX *ctx = talloc_tos();
722 char *name = NULL;
723 struct passwd *pass = NULL;
724
725 pass = getpwuid_alloc(ctx,uid);
726 if (pass) {
727 name = talloc_strdup(ctx,pass->pw_name);
728 TALLOC_FREE(pass);
729 } else {
730 name = talloc_asprintf(ctx,
731 "%ld",
732 (long int)uid);
733 }
734 return name;
735 }
736
737 /*******************************************************************
738 Convert a gid into a group name.
739 ********************************************************************/
740
741 char *gidtoname(gid_t gid)
742 {
743 struct group *grp;
744
745 grp = getgrgid(gid);
746 if (grp) {
747 return talloc_strdup(talloc_tos(), grp->gr_name);
748 }
749 else {
750 return talloc_asprintf(talloc_tos(),
751 "%d",
752 (int)gid);
753 }
754 }
755
756 /*******************************************************************
757 Convert a user name into a uid.
758 ********************************************************************/
759
760 uid_t nametouid(const char *name)
761 {
762 struct passwd *pass;
763 char *p;
764 uid_t u;
765
766 pass = Get_Pwnam_alloc(talloc_tos(), name);
767 if (pass) {
768 u = pass->pw_uid;
769 TALLOC_FREE(pass);
770 return u;
771 }
772
773 u = (uid_t)strtol(name, &p, 0);
774 if ((p != name) && (*p == '\0'))
775 return u;
776
777 return (uid_t)-1;
778 }
779
780 /*******************************************************************
781 Convert a name to a gid_t if possible. Return -1 if not a group.
782 ********************************************************************/
783
784 gid_t nametogid(const char *name)
785 {
786 struct group *grp;
787 char *p;
788 gid_t g;
789
790 g = (gid_t)strtol(name, &p, 0);
791 if ((p != name) && (*p == '\0'))
792 return g;
793
794 grp = getgrnam(name);
795 if (grp)
796 return(grp->gr_gid);
797 return (gid_t)-1;
798 }
799
800 /*******************************************************************
801 Something really nasty happened - panic !
802 ********************************************************************/
803
804 void smb_panic_s3(const char *why)
805 {
806 char *cmd;
807 int result;
808
809 DEBUG(0,("PANIC (pid %llu): %s\n",
810 (unsigned long long)getpid(), why));
811 log_stack_trace();
812
813 #if defined(HAVE_PRCTL) && defined(PR_SET_PTRACER)
814 /*
815 * Make sure all children can attach a debugger.
816 */
817 prctl(PR_SET_PTRACER, getpid(), 0, 0, 0);
818 #endif
819
820 cmd = lp_panic_action(talloc_tos());
821 if (cmd && *cmd) {
822 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
823 result = system(cmd);
824
825 if (result == -1)
826 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
827 strerror(errno)));
828 else
829 DEBUG(0, ("smb_panic(): action returned status %d\n",
830 WEXITSTATUS(result)));
831 }
832
833 dump_core();
834 }
835
836 /*******************************************************************
837 Print a backtrace of the stack to the debug log. This function
838 DELIBERATELY LEAKS MEMORY. The expectation is that you should
839 exit shortly after calling it.
840 ********************************************************************/
841
842 #ifdef HAVE_LIBUNWIND_H
843 #include <libunwind.h>
844 #endif
845
846 #ifdef HAVE_EXECINFO_H
847 #include <execinfo.h>
848 #endif
849
850 #ifdef HAVE_LIBEXC_H
851 #include <libexc.h>
852 #endif
853
854 void log_stack_trace(void)
855 {
856 #ifdef HAVE_LIBUNWIND
857 /* Try to use libunwind before any other technique since on ia64
858 * libunwind correctly walks the stack in more circumstances than
859 * backtrace.
860 */
861 unw_cursor_t cursor;
862 unw_context_t uc;
863 unsigned i = 0;
864
865 char procname[256];
866 unw_word_t ip, sp, off;
867
868 procname[sizeof(procname) - 1] = '\0';
869
870 if (unw_getcontext(&uc) != 0) {
871 goto libunwind_failed;
872 }
873
874 if (unw_init_local(&cursor, &uc) != 0) {
875 goto libunwind_failed;
876 }
877
878 DEBUG(0, ("BACKTRACE:\n"));
879
880 do {
881 ip = sp = 0;
882 unw_get_reg(&cursor, UNW_REG_IP, &ip);
883 unw_get_reg(&cursor, UNW_REG_SP, &sp);
884
885 switch (unw_get_proc_name(&cursor,
886 procname, sizeof(procname) - 1, &off) ) {
887 case 0:
888 /* Name found. */
889 case -UNW_ENOMEM:
890 /* Name truncated. */
891 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
892 i, procname, (long long)off,
893 (long long)ip, (long long) sp));
894 break;
895 default:
896 /* case -UNW_ENOINFO: */
897 /* case -UNW_EUNSPEC: */
898 /* No symbol name found. */
899 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
900 i, "<unknown symbol>",
901 (long long)ip, (long long) sp));
902 }
903 ++i;
904 } while (unw_step(&cursor) > 0);
905
906 return;
907
908 libunwind_failed:
909 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
910
911 #elif HAVE_BACKTRACE_SYMBOLS
912 void *backtrace_stack[BACKTRACE_STACK_SIZE];
913 size_t backtrace_size;
914 char **backtrace_strings;
915
916 /* get the backtrace (stack frames) */
917 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
918 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
919
920 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
921 (unsigned long)backtrace_size));
922
923 if (backtrace_strings) {
924 int i;
925
926 for (i = 0; i < backtrace_size; i++)
927 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
928
929 /* Leak the backtrace_strings, rather than risk what free() might do */
930 }
931
932 #elif HAVE_LIBEXC
933
934 /* The IRIX libexc library provides an API for unwinding the stack. See
935 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
936 * since we are about to abort anyway, it hardly matters.
937 */
938
939 #define NAMESIZE 32 /* Arbitrary */
940
941 __uint64_t addrs[BACKTRACE_STACK_SIZE];
942 char * names[BACKTRACE_STACK_SIZE];
943 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
944
945 int i;
946 int levels;
947
948 ZERO_ARRAY(addrs);
949 ZERO_ARRAY(names);
950 ZERO_ARRAY(namebuf);
951
952 /* We need to be root so we can open our /proc entry to walk
953 * our stack. It also helps when we want to dump core.
954 */
955 become_root();
956
957 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
958 names[i] = namebuf + (i * NAMESIZE);
959 }
960
961 levels = trace_back_stack(0, addrs, names,
962 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
963
964 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
965 for (i = 0; i < levels; i++) {
966 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
967 }
968 #undef NAMESIZE
969
970 #else
971 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
972 #endif
973 }
974
975 /*******************************************************************
976 A readdir wrapper which just returns the file name.
977 ********************************************************************/
978
979 const char *readdirname(DIR *p)
980 {
981 struct dirent *ptr;
982 char *dname;
983
984 if (!p)
985 return(NULL);
986
987 ptr = (struct dirent *)readdir(p);
988 if (!ptr)
989 return(NULL);
990
991 dname = ptr->d_name;
992
993 #ifdef NEXT2
994 if (telldir(p) < 0)
995 return(NULL);
996 #endif
997
998 #ifdef HAVE_BROKEN_READDIR_NAME
999 /* using /usr/ucb/cc is BAD */
1000 dname = dname - 2;
1001 #endif
1002
1003 return talloc_strdup(talloc_tos(), dname);
1004 }
1005
1006 /*******************************************************************
1007 Utility function used to decide if the last component
1008 of a path matches a (possibly wildcarded) entry in a namelist.
1009 ********************************************************************/
1010
1011 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1012 {
1013 const char *last_component;
1014
1015 /* if we have no list it's obviously not in the path */
1016 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1017 return False;
1018 }
1019
1020 DEBUG(8, ("is_in_path: %s\n", name));
1021
1022 /* Get the last component of the unix name. */
1023 last_component = strrchr_m(name, '/');
1024 if (!last_component) {
1025 last_component = name;
1026 } else {
1027 last_component++; /* Go past '/' */
1028 }
1029
1030 for(; namelist->name != NULL; namelist++) {
1031 if(namelist->is_wild) {
1032 if (mask_match(last_component, namelist->name, case_sensitive)) {
1033 DEBUG(8,("is_in_path: mask match succeeded\n"));
1034 return True;
1035 }
1036 } else {
1037 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1038 (!case_sensitive && (strcasecmp_m(last_component, namelist->name) == 0))) {
1039 DEBUG(8,("is_in_path: match succeeded\n"));
1040 return True;
1041 }
1042 }
1043 }
1044 DEBUG(8,("is_in_path: match not found\n"));
1045 return False;
1046 }
1047
1048 /*******************************************************************
1049 Strip a '/' separated list into an array of
1050 name_compare_enties structures suitable for
1051 passing to is_in_path(). We do this for
1052 speed so we can pre-parse all the names in the list
1053 and don't do it for each call to is_in_path().
1054 We also check if the entry contains a wildcard to
1055 remove a potentially expensive call to mask_match
1056 if possible.
1057 ********************************************************************/
1058
1059 void set_namearray(name_compare_entry **ppname_array, const char *namelist_in)
1060 {
1061 char *name_end;
1062 char *namelist;
1063 char *nameptr;
1064 int num_entries = 0;
1065 int i;
1066
1067 (*ppname_array) = NULL;
1068
1069 if((namelist_in == NULL ) || ((namelist_in != NULL) && (*namelist_in == '\0')))
1070 return;
1071
1072 namelist = talloc_strdup(talloc_tos(), namelist_in);
1073 if (namelist == NULL) {
1074 DEBUG(0,("set_namearray: talloc fail\n"));
1075 return;
1076 }
1077 nameptr = namelist;
1078
1079 /* We need to make two passes over the string. The
1080 first to count the number of elements, the second
1081 to split it.
1082 */
1083
1084 while(*nameptr) {
1085 if ( *nameptr == '/' ) {
1086 /* cope with multiple (useless) /s) */
1087 nameptr++;
1088 continue;
1089 }
1090 /* anything left? */
1091 if ( *nameptr == '\0' )
1092 break;
1093
1094 /* find the next '/' or consume remaining */
1095 name_end = strchr_m(nameptr, '/');
1096 if (name_end == NULL)
1097 name_end = (char *)nameptr + strlen(nameptr);
1098
1099 /* next segment please */
1100 nameptr = name_end + 1;
1101 num_entries++;
1102 }
1103
1104 if(num_entries == 0) {
1105 talloc_free(namelist);
1106 return;
1107 }
1108
1109 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1110 DEBUG(0,("set_namearray: malloc fail\n"));
1111 talloc_free(namelist);
1112 return;
1113 }
1114
1115 /* Now copy out the names */
1116 nameptr = namelist;
1117 i = 0;
1118 while(*nameptr) {
1119 if ( *nameptr == '/' ) {
1120 /* cope with multiple (useless) /s) */
1121 nameptr++;
1122 continue;
1123 }
1124 /* anything left? */
1125 if ( *nameptr == '\0' )
1126 break;
1127
1128 /* find the next '/' or consume remaining */
1129 name_end = strchr_m(nameptr, '/');
1130 if (name_end)
1131 *name_end = '\0';
1132 else
1133 name_end = nameptr + strlen(nameptr);
1134
1135 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1136 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1137 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1138 talloc_free(namelist);
1139 return;
1140 }
1141
1142 /* next segment please */
1143 nameptr = name_end + 1;
1144 i++;
1145 }
1146
1147 (*ppname_array)[i].name = NULL;
1148
1149 talloc_free(namelist);
1150 return;
1151 }
1152
1153 #undef DBGC_CLASS
1154 #define DBGC_CLASS DBGC_LOCKING
1155
1156 /****************************************************************************
1157 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1158 is dealt with in posix.c
1159 Returns True if we have information regarding this lock region (and returns
1160 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1161 ****************************************************************************/
1162
1163 bool fcntl_getlock(int fd, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
1164 {
1165 struct flock lock;
1166 int ret;
1167
1168 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1169 fd,(double)*poffset,(double)*pcount,*ptype));
1170
1171 lock.l_type = *ptype;
1172 lock.l_whence = SEEK_SET;
1173 lock.l_start = *poffset;
1174 lock.l_len = *pcount;
1175 lock.l_pid = 0;
1176
1177 ret = sys_fcntl_ptr(fd,F_GETLK,&lock);
1178
1179 if (ret == -1) {
1180 int sav = errno;
1181 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1182 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1183 errno = sav;
1184 return False;
1185 }
1186
1187 *ptype = lock.l_type;
1188 *poffset = lock.l_start;
1189 *pcount = lock.l_len;
1190 *ppid = lock.l_pid;
1191
1192 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1193 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1194 return True;
1195 }
1196
1197 #undef DBGC_CLASS
1198 #define DBGC_CLASS DBGC_ALL
1199
1200 /*******************************************************************
1201 Is the name specified one of my netbios names.
1202 Returns true if it is equal, false otherwise.
1203 ********************************************************************/
1204
1205 bool is_myname(const char *s)
1206 {
1207 int n;
1208 bool ret = False;
1209
1210 for (n=0; my_netbios_names(n); n++) {
1211 if (strequal(my_netbios_names(n), s)) {
1212 ret=True;
1213 break;
1214 }
1215 }
1216 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1217 return(ret);
1218 }
1219
1220 /*******************************************************************
1221 we distinguish between 2K and XP by the "Native Lan Manager" string
1222 WinXP => "Windows 2002 5.1"
1223 WinXP 64bit => "Windows XP 5.2"
1224 Win2k => "Windows 2000 5.0"
1225 NT4 => "Windows NT 4.0"
1226 Win9x => "Windows 4.0"
1227 Windows 2003 doesn't set the native lan manager string but
1228 they do set the domain to "Windows 2003 5.2" (probably a bug).
1229 ********************************************************************/
1230
1231 void ra_lanman_string( const char *native_lanman )
1232 {
1233 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1234 set_remote_arch( RA_WINXP );
1235 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1236 set_remote_arch( RA_WINXP64 );
1237 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1238 set_remote_arch( RA_WIN2K3 );
1239 }
1240
1241 static const char *remote_arch_str;
1242
1243 const char *get_remote_arch_str(void)
1244 {
1245 if (!remote_arch_str) {
1246 return "UNKNOWN";
1247 }
1248 return remote_arch_str;
1249 }
1250
1251 /*******************************************************************
1252 Set the horrid remote_arch string based on an enum.
1253 ********************************************************************/
1254
1255 void set_remote_arch(enum remote_arch_types type)
1256 {
1257 ra_type = type;
1258 switch( type ) {
1259 case RA_WFWG:
1260 remote_arch_str = "WfWg";
1261 break;
1262 case RA_OS2:
1263 remote_arch_str = "OS2";
1264 break;
1265 case RA_WIN95:
1266 remote_arch_str = "Win95";
1267 break;
1268 case RA_WINNT:
1269 remote_arch_str = "WinNT";
1270 break;
1271 case RA_WIN2K:
1272 remote_arch_str = "Win2K";
1273 break;
1274 case RA_WINXP:
1275 remote_arch_str = "WinXP";
1276 break;
1277 case RA_WINXP64:
1278 remote_arch_str = "WinXP64";
1279 break;
1280 case RA_WIN2K3:
1281 remote_arch_str = "Win2K3";
1282 break;
1283 case RA_VISTA:
1284 remote_arch_str = "Vista";
1285 break;
1286 case RA_SAMBA:
1287 remote_arch_str = "Samba";
1288 break;
1289 case RA_CIFSFS:
1290 remote_arch_str = "CIFSFS";
1291 break;
1292 case RA_OSX:
1293 remote_arch_str = "OSX";
1294 break;
1295 default:
1296 ra_type = RA_UNKNOWN;
1297 remote_arch_str = "UNKNOWN";
1298 break;
1299 }
1300
1301 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1302 remote_arch_str));
1303 }
1304
1305 /*******************************************************************
1306 Get the remote_arch type.
1307 ********************************************************************/
1308
1309 enum remote_arch_types get_remote_arch(void)
1310 {
1311 return ra_type;
1312 }
1313
1314 const char *tab_depth(int level, int depth)
1315 {
1316 if( CHECK_DEBUGLVL(level) ) {
1317 dbgtext("%*s", depth*4, "");
1318 }
1319 return "";
1320 }
1321
1322 /*****************************************************************************
1323 Provide a checksum on a string
1324
1325 Input: s - the null-terminated character string for which the checksum
1326 will be calculated.
1327
1328 Output: The checksum value calculated for s.
1329 *****************************************************************************/
1330
1331 int str_checksum(const char *s)
1332 {
1333 if (s == NULL)
1334 return 0;
1335 return hash(s, strlen(s), 0);
1336 }
1337
1338 /*****************************************************************
1339 Zero a memory area then free it. Used to catch bugs faster.
1340 *****************************************************************/
1341
1342 void zero_free(void *p, size_t size)
1343 {
1344 memset(p, 0, size);
1345 SAFE_FREE(p);
1346 }
1347
1348 /*****************************************************************
1349 Set our open file limit to a requested max and return the limit.
1350 *****************************************************************/
1351
1352 int set_maxfiles(int requested_max)
1353 {
1354 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1355 struct rlimit rlp;
1356 int saved_current_limit;
1357
1358 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1359 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1360 strerror(errno) ));
1361 /* just guess... */
1362 return requested_max;
1363 }
1364
1365 /*
1366 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1367 * account for the extra fd we need
1368 * as well as the log files and standard
1369 * handles etc. Save the limit we want to set in case
1370 * we are running on an OS that doesn't support this limit (AIX)
1371 * which always returns RLIM_INFINITY for rlp.rlim_max.
1372 */
1373
1374 /* Try raising the hard (max) limit to the requested amount. */
1375
1376 #if defined(RLIM_INFINITY)
1377 if (rlp.rlim_max != RLIM_INFINITY) {
1378 int orig_max = rlp.rlim_max;
1379
1380 if ( rlp.rlim_max < requested_max )
1381 rlp.rlim_max = requested_max;
1382
1383 /* This failing is not an error - many systems (Linux) don't
1384 support our default request of 10,000 open files. JRA. */
1385
1386 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1387 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
1388 (int)rlp.rlim_max, strerror(errno) ));
1389
1390 /* Set failed - restore original value from get. */
1391 rlp.rlim_max = orig_max;
1392 }
1393 }
1394 #endif
1395
1396 /* Now try setting the soft (current) limit. */
1397
1398 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
1399
1400 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1401 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
1402 (int)rlp.rlim_cur, strerror(errno) ));
1403 /* just guess... */
1404 return saved_current_limit;
1405 }
1406
1407 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1408 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
1409 strerror(errno) ));
1410 /* just guess... */
1411 return saved_current_limit;
1412 }
1413
1414 #if defined(RLIM_INFINITY)
1415 if(rlp.rlim_cur == RLIM_INFINITY)
1416 return saved_current_limit;
1417 #endif
1418
1419 if((int)rlp.rlim_cur > saved_current_limit)
1420 return saved_current_limit;
1421
1422 return rlp.rlim_cur;
1423 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
1424 /*
1425 * No way to know - just guess...
1426 */
1427 return requested_max;
1428 #endif
1429 }
1430
1431 /*****************************************************************
1432 malloc that aborts with smb_panic on fail or zero size.
1433 *****************************************************************/
1434
1435 void *smb_xmalloc_array(size_t size, unsigned int count)
1436 {
1437 void *p;
1438 if (size == 0) {
1439 smb_panic("smb_xmalloc_array: called with zero size");
1440 }
1441 if (count >= MAX_ALLOC_SIZE/size) {
1442 smb_panic("smb_xmalloc_array: alloc size too large");
1443 }
1444 if ((p = SMB_MALLOC(size*count)) == NULL) {
1445 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
1446 (unsigned long)size, (unsigned long)count));
1447 smb_panic("smb_xmalloc_array: malloc failed");
1448 }
1449 return p;
1450 }
1451
1452 /*
1453 vasprintf that aborts on malloc fail
1454 */
1455
1456 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
1457 {
1458 int n;
1459 va_list ap2;
1460
1461 va_copy(ap2, ap);
1462
1463 n = vasprintf(ptr, format, ap2);
1464 va_end(ap2);
1465 if (n == -1 || ! *ptr) {
1466 smb_panic("smb_xvasprintf: out of memory");
1467 }
1468 return n;
1469 }
1470
1471 /*****************************************************************
1472 Get local hostname and cache result.
1473 *****************************************************************/
1474
1475 char *myhostname(void)
1476 {
1477 static char *ret;
1478 if (ret == NULL) {
1479 ret = get_myname(NULL);
1480 }
1481 return ret;
1482 }
1483
1484 /*****************************************************************
1485 Get local hostname and cache result.
1486 *****************************************************************/
1487
1488 char *myhostname_upper(void)
1489 {
1490 char *name;
1491 static char *ret;
1492 if (ret == NULL) {
1493 name = get_myname(talloc_tos());
1494 ret = strupper_talloc(NULL, name);
1495 talloc_free(name);
1496 }
1497 return ret;
1498 }
1499
1500 /**
1501 * @brief Returns an absolute path to a file concatenating the provided
1502 * @a rootpath and @a basename
1503 *
1504 * @param name Filename, relative to @a rootpath
1505 *
1506 * @retval Pointer to a string containing the full path.
1507 **/
1508
1509 static char *xx_path(const char *name, const char *rootpath)
1510 {
1511 char *fname = NULL;
1512
1513 fname = talloc_strdup(talloc_tos(), rootpath);
1514 if (!fname) {
1515 return NULL;
1516 }
1517 trim_string(fname,"","/");
1518
1519 if (!directory_exist(fname)) {
1520 if (mkdir(fname,0755) == -1) {
1521 /* Did someone else win the race ? */
1522 if (errno != EEXIST) {
1523 DEBUG(1, ("Unable to create directory %s for file %s. "
1524 "Error was %s\n", fname, name, strerror(errno)));
1525 return NULL;
1526 }
1527 }
1528 }
1529
1530 return talloc_asprintf_append(fname, "/%s", name);
1531 }
1532
1533 /**
1534 * @brief Returns an absolute path to a file in the Samba lock directory.
1535 *
1536 * @param name File to find, relative to LOCKDIR.
1537 *
1538 * @retval Pointer to a talloc'ed string containing the full path.
1539 **/
1540
1541 char *lock_path(const char *name)
1542 {
1543 return xx_path(name, lp_lockdir());
1544 }
1545
1546 /**
1547 * @brief Returns an absolute path to a file in the Samba state directory.
1548 *
1549 * @param name File to find, relative to STATEDIR.
1550 *
1551 * @retval Pointer to a talloc'ed string containing the full path.
1552 **/
1553
1554 char *state_path(const char *name)
1555 {
1556 return xx_path(name, lp_statedir());
1557 }
1558
1559 /**
1560 * @brief Returns an absolute path to a file in the Samba cache directory.
1561 *
1562 * @param name File to find, relative to CACHEDIR.
1563 *
1564 * @retval Pointer to a talloc'ed string containing the full path.
1565 **/
1566
1567 char *cache_path(const char *name)
1568 {
1569 return xx_path(name, lp_cachedir());
1570 }
1571
1572 /*******************************************************************
1573 Given a filename - get its directory name
1574 ********************************************************************/
1575
1576 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
1577 const char **name)
1578 {
1579 char *p;
1580 ptrdiff_t len;
1581
1582 p = strrchr_m(dir, '/'); /* Find final '/', if any */
1583
1584 if (p == NULL) {
1585 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
1586 return False;
1587 }
1588 if (name) {
1589 *name = dir;
1590 }
1591 return True;
1592 }
1593
1594 len = p-dir;
1595
1596 if (!(*parent = (char *)talloc_memdup(mem_ctx, dir, len+1))) {
1597 return False;
1598 }
1599 (*parent)[len] = '\0';
1600
1601 if (name) {
1602 *name = p+1;
1603 }
1604 return True;
1605 }
1606
1607 /*******************************************************************
1608 Determine if a pattern contains any Microsoft wildcard characters.
1609 *******************************************************************/
1610
1611 bool ms_has_wild(const char *s)
1612 {
1613 char c;
1614
1615 if (lp_posix_pathnames()) {
1616 /* With posix pathnames no characters are wild. */
1617 return False;
1618 }
1619
1620 while ((c = *s++)) {
1621 switch (c) {
1622 case '*':
1623 case '?':
1624 case '<':
1625 case '>':
1626 case '"':
1627 return True;
1628 }
1629 }
1630 return False;
1631 }
1632
1633 bool ms_has_wild_w(const smb_ucs2_t *s)
1634 {
1635 smb_ucs2_t c;
1636 if (!s) return False;
1637 while ((c = *s++)) {
1638 switch (c) {
1639 case UCS2_CHAR('*'):
1640 case UCS2_CHAR('?'):
1641 case UCS2_CHAR('<'):
1642 case UCS2_CHAR('>'):
1643 case UCS2_CHAR('"'):
1644 return True;
1645 }
1646 }
1647 return False;
1648 }
1649
1650 /*******************************************************************
1651 A wrapper that handles case sensitivity and the special handling
1652 of the ".." name.
1653 *******************************************************************/
1654
1655 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
1656 {
1657 if (ISDOTDOT(string))
1658 string = ".";
1659 if (ISDOT(pattern))
1660 return False;
1661
1662 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
1663 }
1664
1665 /*******************************************************************
1666 A wrapper that handles case sensitivity and the special handling
1667 of the ".." name. Varient that is only called by old search code which requires
1668 pattern translation.
1669 *******************************************************************/
1670
1671 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
1672 {
1673 if (ISDOTDOT(string))
1674 string = ".";
1675 if (ISDOT(pattern))
1676 return False;
1677
1678 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
1679 }
1680
1681 /*******************************************************************
1682 A wrapper that handles a list of patters and calls mask_match()
1683 on each. Returns True if any of the patterns match.
1684 *******************************************************************/
1685
1686 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
1687 {
1688 while (listLen-- > 0) {
1689 if (mask_match(string, *list++, is_case_sensitive))
1690 return True;
1691 }
1692 return False;
1693 }
1694
1695 /*********************************************************
1696 Recursive routine that is called by unix_wild_match.
1697 *********************************************************/
1698
1699 static bool unix_do_match(const char *regexp, const char *str)
1700 {
1701 const char *p;
1702
1703 for( p = regexp; *p && *str; ) {
1704
1705 switch(*p) {
1706 case '?':
1707 str++;
1708 p++;
1709 break;
1710
1711 case '*':
1712
1713 /*
1714 * Look for a character matching
1715 * the one after the '*'.
1716 */
1717 p++;
1718 if(!*p)
1719 return true; /* Automatic match */
1720 while(*str) {
1721
1722 while(*str && (*p != *str))
1723 str++;
1724
1725 /*
1726 * Patch from weidel@multichart.de. In the case of the regexp
1727 * '*XX*' we want to ensure there are at least 2 'X' characters
1728 * in the string after the '*' for a match to be made.
1729 */
1730
1731 {
1732 int matchcount=0;
1733
1734 /*
1735 * Eat all the characters that match, but count how many there were.
1736 */
1737
1738 while(*str && (*p == *str)) {
1739 str++;
1740 matchcount++;
1741 }
1742
1743 /*
1744 * Now check that if the regexp had n identical characters that
1745 * matchcount had at least that many matches.
1746 */
1747
1748 while ( *(p+1) && (*(p+1) == *p)) {
1749 p++;
1750 matchcount--;
1751 }
1752
1753 if ( matchcount <= 0 )
1754 return false;
1755 }
1756
1757 str--; /* We've eaten the match char after the '*' */
1758
1759 if(unix_do_match(p, str))
1760 return true;
1761
1762 if(!*str)
1763 return false;
1764 else
1765 str++;
1766 }
1767 return false;
1768
1769 default:
1770 if(*str != *p)
1771 return false;
1772 str++;
1773 p++;
1774 break;
1775 }
1776 }
1777
1778 if(!*p && !*str)
1779 return true;
1780
1781 if (!*p && str[0] == '.' && str[1] == 0)
1782 return true;
1783
1784 if (!*str && *p == '?') {
1785 while (*p == '?')
1786 p++;
1787 return(!*p);
1788 }
1789
1790 if(!*str && (*p == '*' && p[1] == '\0'))
1791 return true;
1792
1793 return false;
1794 }
1795
1796 /*******************************************************************
1797 Simple case insensitive interface to a UNIX wildcard matcher.
1798 Returns True if match, False if not.
1799 *******************************************************************/
1800
1801 bool unix_wild_match(const char *pattern, const char *string)
1802 {
1803 TALLOC_CTX *ctx = talloc_stackframe();
1804 char *p2;
1805 char *s2;
1806 char *p;
1807 bool ret = false;
1808
1809 p2 = talloc_strdup(ctx,pattern);
1810 s2 = talloc_strdup(ctx,string);
1811 if (!p2 || !s2) {
1812 TALLOC_FREE(ctx);
1813 return false;
1814 }
1815 if (!strlower_m(p2)) {
1816 TALLOC_FREE(ctx);
1817 return false;
1818 }
1819 if (!strlower_m(s2)) {
1820 TALLOC_FREE(ctx);
1821 return false;
1822 }
1823
1824 /* Remove any *? and ** from the pattern as they are meaningless */
1825 for(p = p2; *p; p++) {
1826 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
1827 memmove(&p[1], &p[2], strlen(&p[2])+1);
1828 }
1829 }
1830
1831 if (strequal(p2,"*")) {
1832 TALLOC_FREE(ctx);
1833 return true;
1834 }
1835
1836 ret = unix_do_match(p2, s2);
1837 TALLOC_FREE(ctx);
1838 return ret;
1839 }
1840
1841 /**********************************************************************
1842 Converts a name to a fully qualified domain name.
1843 Returns true if lookup succeeded, false if not (then fqdn is set to name)
1844 Note we deliberately use gethostbyname here, not getaddrinfo as we want
1845 to examine the h_aliases and I don't know how to do that with getaddrinfo.
1846 ***********************************************************************/
1847
1848 bool name_to_fqdn(fstring fqdn, const char *name)
1849 {
1850 char *full = NULL;
1851 struct hostent *hp = gethostbyname(name);
1852
1853 if (!hp || !hp->h_name || !*hp->h_name) {
1854 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
1855 fstrcpy(fqdn, name);
1856 return false;
1857 }
1858
1859 /* Find out if the fqdn is returned as an alias
1860 * to cope with /etc/hosts files where the first
1861 * name is not the fqdn but the short name */
1862 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
1863 int i;
1864 for (i = 0; hp->h_aliases[i]; i++) {
1865 if (strchr_m(hp->h_aliases[i], '.')) {
1866 full = hp->h_aliases[i];
1867 break;
1868 }
1869 }
1870 }
1871 if (full && (strcasecmp_m(full, "localhost.localdomain") == 0)) {
1872 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
1873 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
1874 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
1875 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
1876 full = hp->h_name;
1877 }
1878 if (!full) {
1879 full = hp->h_name;
1880 }
1881
1882 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
1883 fstrcpy(fqdn, full);
1884 return true;
1885 }
1886
1887 /**********************************************************************
1888 Append a DATA_BLOB to a talloc'ed object
1889 ***********************************************************************/
1890
1891 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
1892 {
1893 size_t old_size = 0;
1894 char *result;
1895
1896 if (blob.length == 0) {
1897 return buf;
1898 }
1899
1900 if (buf != NULL) {
1901 old_size = talloc_get_size(buf);
1902 }
1903
1904 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
1905 if (result == NULL) {
1906 return NULL;
1907 }
1908
1909 memcpy(result + old_size, blob.data, blob.length);
1910 return result;
1911 }
1912
1913 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
1914 {
1915 switch (share_access & ~FILE_SHARE_DELETE) {
1916 case FILE_SHARE_NONE:
1917 return DENY_ALL;
1918 case FILE_SHARE_READ:
1919 return DENY_WRITE;
1920 case FILE_SHARE_WRITE:
1921 return DENY_READ;
1922 case FILE_SHARE_READ|FILE_SHARE_WRITE:
1923 return DENY_NONE;
1924 }
1925 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
1926 return DENY_DOS;
1927 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
1928 return DENY_FCB;
1929 }
1930
1931 return (uint32)-1;
1932 }
1933
1934 pid_t procid_to_pid(const struct server_id *proc)
1935 {
1936 return proc->pid;
1937 }
1938
1939 static uint32 my_vnn = NONCLUSTER_VNN;
1940
1941 void set_my_vnn(uint32 vnn)
1942 {
1943 DEBUG(10, ("vnn pid %d = %u\n", (int)getpid(), (unsigned int)vnn));
1944 my_vnn = vnn;
1945 }
1946
1947 uint32 get_my_vnn(void)
1948 {
1949 return my_vnn;
1950 }
1951
1952 static uint64_t my_unique_id = 0;
1953
1954 void set_my_unique_id(uint64_t unique_id)
1955 {
1956 my_unique_id = unique_id;
1957 }
1958
1959 struct server_id pid_to_procid(pid_t pid)
1960 {
1961 struct server_id result;
1962 result.pid = pid;
1963 result.task_id = 0;
1964 result.unique_id = my_unique_id;
1965 result.vnn = my_vnn;
1966 return result;
1967 }
1968
1969 struct server_id procid_self(void)
1970 {
1971 return pid_to_procid(getpid());
1972 }
1973
1974 static struct idr_context *task_id_tree;
1975
1976 static int free_task_id(struct server_id *server_id)
1977 {
1978 idr_remove(task_id_tree, server_id->task_id);
1979 return 0;
1980 }
1981
1982 /* Return a server_id with a unique task_id element. Free the
1983 * returned pointer to de-allocate the task_id via a talloc destructor
1984 * (ie, use talloc_free()) */
1985 struct server_id *new_server_id_task(TALLOC_CTX *mem_ctx)
1986 {
1987 struct server_id *server_id;
1988 int task_id;
1989 if (!task_id_tree) {
1990 task_id_tree = idr_init(NULL);
1991 if (!task_id_tree) {
1992 return NULL;
1993 }
1994 }
1995
1996 server_id = talloc(mem_ctx, struct server_id);
1997
1998 if (!server_id) {
1999 return NULL;
2000 }
2001 *server_id = procid_self();
2002
2003 /* 0 is the default server_id, so we need to start with 1 */
2004 task_id = idr_get_new_above(task_id_tree, server_id, 1, INT32_MAX);
2005
2006 if (task_id == -1) {
2007 talloc_free(server_id);
2008 return NULL;
2009 }
2010
2011 talloc_set_destructor(server_id, free_task_id);
2012 server_id->task_id = task_id;
2013 return server_id;
2014 }
2015
2016 bool procid_is_me(const struct server_id *pid)
2017 {
2018 if (pid->pid != getpid())
2019 return False;
2020 if (pid->task_id != 0)
2021 return False;
2022 if (pid->vnn != my_vnn)
2023 return False;
2024 return True;
2025 }
2026
2027 struct server_id interpret_pid(const char *pid_string)
2028 {
2029 return server_id_from_string(get_my_vnn(), pid_string);
2030 }
2031
2032 char *procid_str_static(const struct server_id *pid)
2033 {
2034 return server_id_str(talloc_tos(), pid);
2035 }
2036
2037 bool procid_valid(const struct server_id *pid)
2038 {
2039 return (pid->pid != (uint64_t)-1);
2040 }
2041
2042 bool procid_is_local(const struct server_id *pid)
2043 {
2044 return pid->vnn == my_vnn;
2045 }
2046
2047 /****************************************************************
2048 Check if an offset into a buffer is safe.
2049 If this returns True it's safe to indirect into the byte at
2050 pointer ptr+off.
2051 ****************************************************************/
2052
2053 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2054 {
2055 const char *end_base = buf_base + buf_len;
2056 char *end_ptr = ptr + off;
2057
2058 if (!buf_base || !ptr) {
2059 return False;
2060 }
2061
2062 if (end_base < buf_base || end_ptr < ptr) {
2063 return False; /* wrap. */
2064 }
2065
2066 if (end_ptr < end_base) {
2067 return True;
2068 }
2069 return False;
2070 }
2071
2072 /****************************************************************
2073 Return a safe pointer into a buffer, or NULL.
2074 ****************************************************************/
2075
2076 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2077 {
2078 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2079 ptr + off : NULL;
2080 }
2081
2082 /****************************************************************
2083 Return a safe pointer into a string within a buffer, or NULL.
2084 ****************************************************************/
2085
2086 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2087 {
2088 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2089 return NULL;
2090 }
2091 /* Check if a valid string exists at this offset. */
2092 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2093 return NULL;
2094 }
2095 return ptr + off;
2096 }
2097
2098 /****************************************************************
2099 Return an SVAL at a pointer, or failval if beyond the end.
2100 ****************************************************************/
2101
2102 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2103 {
2104 /*
2105 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2106 * NOT ptr[2].
2107 */
2108 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2109 return failval;
2110 }
2111 return SVAL(ptr,off);
2112 }
2113
2114 /****************************************************************
2115 Return an IVAL at a pointer, or failval if beyond the end.
2116 ****************************************************************/
2117
2118 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2119 {
2120 /*
2121 * Note we use off+3 here, not off+4 as IVAL accesses
2122 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2123 */
2124 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2125 return failval;
2126 }
2127 return IVAL(ptr,off);
2128 }
2129
2130 /****************************************************************
2131 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2132 call (they take care of winbind separator and other winbind specific settings).
2133 ****************************************************************/
2134
2135 void split_domain_user(TALLOC_CTX *mem_ctx,
2136 const char *full_name,
2137 char **domain,
2138 char **user)
2139 {
2140 const char *p = NULL;
2141
2142 p = strchr_m(full_name, '\\');
2143
2144 if (p != NULL) {
2145 *domain = talloc_strndup(mem_ctx, full_name,
2146 PTR_DIFF(p, full_name));
2147 *user = talloc_strdup(mem_ctx, p+1);
2148 } else {
2149 *domain = talloc_strdup(mem_ctx, "");
2150 *user = talloc_strdup(mem_ctx, full_name);
2151 }
2152 }
2153
2154 /****************************************************************
2155 strip off leading '\\' from a hostname
2156 ****************************************************************/
2157
2158 const char *strip_hostname(const char *s)
2159 {
2160 if (!s) {
2161 return NULL;
2162 }
2163
2164 if (strlen_m(s) < 3) {
2165 return s;
2166 }
2167
2168 if (s[0] == '\\') s++;
2169 if (s[0] == '\\') s++;
2170
2171 return s;
2172 }
2173
2174 bool any_nt_status_not_ok(NTSTATUS err1, NTSTATUS err2, NTSTATUS *result)
2175 {
2176 if (!NT_STATUS_IS_OK(err1)) {
2177 *result = err1;
2178 return true;
2179 }
2180 if (!NT_STATUS_IS_OK(err2)) {
2181 *result = err2;
2182 return true;
2183 }
2184 return false;
2185 }
2186
2187 int timeval_to_msec(struct timeval t)
2188 {
2189 return t.tv_sec * 1000 + (t.tv_usec+999) / 1000;
2190 }
2191
2192 /*******************************************************************
2193 Check a given DOS pathname is valid for a share.
2194 ********************************************************************/
2195
2196 char *valid_share_pathname(TALLOC_CTX *ctx, const char *dos_pathname)
2197 {
2198 char *ptr = NULL;
2199
2200 if (!dos_pathname) {
2201 return NULL;
2202 }
2203
2204 ptr = talloc_strdup(ctx, dos_pathname);
2205 if (!ptr) {
2206 return NULL;
2207 }
2208 /* Convert any '\' paths to '/' */
2209 unix_format(ptr);
2210 ptr = unix_clean_name(ctx, ptr);
2211 if (!ptr) {
2212 return NULL;
2213 }
2214
2215 /* NT is braindead - it wants a C: prefix to a pathname ! So strip it. */
2216 if (strlen(ptr) > 2 && ptr[1] == ':' && ptr[0] != '/')
2217 ptr += 2;
2218
2219 /* Only absolute paths allowed. */
2220 if (*ptr != '/')
2221 return NULL;
2222
2223 return ptr;
2224 }
2225
2226 /*******************************************************************
2227 Return True if the filename is one of the special executable types.
2228 ********************************************************************/
2229
2230 bool is_executable(const char *fname)
2231 {
2232 if ((fname = strrchr_m(fname,'.'))) {
2233 if (strequal(fname,".com") ||
2234 strequal(fname,".dll") ||
2235 strequal(fname,".exe") ||
2236 strequal(fname,".sym")) {
2237 return True;
2238 }
2239 }
2240 return False;
2241 }
2242
2243 /****************************************************************************
2244 Open a file with a share mode - old openX method - map into NTCreate.
2245 ****************************************************************************/
2246
2247 bool map_open_params_to_ntcreate(const char *smb_base_fname,
2248 int deny_mode, int open_func,
2249 uint32 *paccess_mask,
2250 uint32 *pshare_mode,
2251 uint32 *pcreate_disposition,
2252 uint32 *pcreate_options,
2253 uint32_t *pprivate_flags)
2254 {
2255 uint32 access_mask;
2256 uint32 share_mode;
2257 uint32 create_disposition;
2258 uint32 create_options = FILE_NON_DIRECTORY_FILE;
2259 uint32_t private_flags = 0;
2260
2261 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
2262 "open_func = 0x%x\n",
2263 smb_base_fname, (unsigned int)deny_mode,
2264 (unsigned int)open_func ));
2265
2266 /* Create the NT compatible access_mask. */
2267 switch (GET_OPENX_MODE(deny_mode)) {
2268 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
2269 case DOS_OPEN_RDONLY:
2270 access_mask = FILE_GENERIC_READ;
2271 break;
2272 case DOS_OPEN_WRONLY:
2273 access_mask = FILE_GENERIC_WRITE;
2274 break;
2275 case DOS_OPEN_RDWR:
2276 case DOS_OPEN_FCB:
2277 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
2278 break;
2279 default:
2280 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
2281 (unsigned int)GET_OPENX_MODE(deny_mode)));
2282 return False;
2283 }
2284
2285 /* Create the NT compatible create_disposition. */
2286 switch (open_func) {
2287 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
2288 create_disposition = FILE_CREATE;
2289 break;
2290
2291 case OPENX_FILE_EXISTS_OPEN:
2292 create_disposition = FILE_OPEN;
2293 break;
2294
2295 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
2296 create_disposition = FILE_OPEN_IF;
2297 break;
2298
2299 case OPENX_FILE_EXISTS_TRUNCATE:
2300 create_disposition = FILE_OVERWRITE;
2301 break;
2302
2303 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
2304 create_disposition = FILE_OVERWRITE_IF;
2305 break;
2306
2307 default:
2308 /* From samba4 - to be confirmed. */
2309 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
2310 create_disposition = FILE_CREATE;
2311 break;
2312 }
2313 DEBUG(10,("map_open_params_to_ntcreate: bad "
2314 "open_func 0x%x\n", (unsigned int)open_func));
2315 return False;
2316 }
2317
2318 /* Create the NT compatible share modes. */
2319 switch (GET_DENY_MODE(deny_mode)) {
2320 case DENY_ALL:
2321 share_mode = FILE_SHARE_NONE;
2322 break;
2323
2324 case DENY_WRITE:
2325 share_mode = FILE_SHARE_READ;
2326 break;
2327
2328 case DENY_READ:
2329 share_mode = FILE_SHARE_WRITE;
2330 break;
2331
2332 case DENY_NONE:
2333 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
2334 break;
2335
2336 case DENY_DOS:
2337 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
2338 if (is_executable(smb_base_fname)) {
2339 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
2340 } else {
2341 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
2342 share_mode = FILE_SHARE_READ;
2343 } else {
2344 share_mode = FILE_SHARE_NONE;
2345 }
2346 }
2347 break;
2348
2349 case DENY_FCB:
2350 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
2351 share_mode = FILE_SHARE_NONE;
2352 break;
2353
2354 default:
2355 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
2356 (unsigned int)GET_DENY_MODE(deny_mode) ));
2357 return False;
2358 }
2359
2360 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
2361 "share_mode = 0x%x, create_disposition = 0x%x, "
2362 "create_options = 0x%x private_flags = 0x%x\n",
2363 smb_base_fname,
2364 (unsigned int)access_mask,
2365 (unsigned int)share_mode,
2366 (unsigned int)create_disposition,
2367 (unsigned int)create_options,
2368 (unsigned int)private_flags));
2369
2370 if (paccess_mask) {
2371 *paccess_mask = access_mask;
2372 }
2373 if (pshare_mode) {
2374 *pshare_mode = share_mode;
2375 }
2376 if (pcreate_disposition) {
2377 *pcreate_disposition = create_disposition;
2378 }
2379 if (pcreate_options) {
2380 *pcreate_options = create_options;
2381 }
2382 if (pprivate_flags) {
2383 *pprivate_flags = private_flags;
2384 }
2385
2386 return True;
2387
2388 }
2389
2390 /*************************************************************************
2391 Return a talloced copy of a struct security_unix_token. NULL on fail.
2392 *************************************************************************/
2393
2394 struct security_unix_token *copy_unix_token(TALLOC_CTX *ctx, const struct security_unix_token *tok)
2395 {
2396 struct security_unix_token *cpy;
2397
2398 cpy = talloc(ctx, struct security_unix_token);
2399 if (!cpy) {
2400 return NULL;
2401 }
2402
2403 cpy->uid = tok->uid;
2404 cpy->gid = tok->gid;
2405 cpy->ngroups = tok->ngroups;
2406 if (tok->ngroups) {
2407 /* Make this a talloc child of cpy. */
2408 cpy->groups = (gid_t *)talloc_memdup(
2409 cpy, tok->groups, tok->ngroups * sizeof(gid_t));
2410 if (!cpy->groups) {
2411 TALLOC_FREE(cpy);
2412 return NULL;
2413 }
2414 } else {
2415 cpy->groups = NULL;
2416 }
2417 return cpy;
2418 }
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