source: vendor/current/source3/lib/util.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 55.3 KB
Line 
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 "messages_dgm.h"
32#include "libcli/security/security.h"
33#include "serverid.h"
34#include "lib/util/sys_rw.h"
35#include "lib/util/sys_rw_data.h"
36#include "lib/util/util_process.h"
37
38#ifdef HAVE_SYS_PRCTL_H
39#include <sys/prctl.h>
40#endif
41
42/* Max allowable allococation - 256mb - 0x10000000 */
43#define MAX_ALLOC_SIZE (1024*1024*256)
44
45#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
46#ifdef WITH_NISPLUS_HOME
47#ifdef BROKEN_NISPLUS_INCLUDE_FILES
48/*
49 * The following lines are needed due to buggy include files
50 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
51 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
52 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
53 * an enum in /usr/include/rpcsvc/nis.h.
54 */
55
56#if defined(GROUP)
57#undef GROUP
58#endif
59
60#if defined(GROUP_OBJ)
61#undef GROUP_OBJ
62#endif
63
64#endif /* BROKEN_NISPLUS_INCLUDE_FILES */
65
66#include <rpcsvc/nis.h>
67
68#endif /* WITH_NISPLUS_HOME */
69#endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
70
71static enum protocol_types Protocol = PROTOCOL_COREPLUS;
72
73enum protocol_types get_Protocol(void)
74{
75 return Protocol;
76}
77
78void set_Protocol(enum protocol_types p)
79{
80 Protocol = p;
81}
82
83static enum remote_arch_types ra_type = RA_UNKNOWN;
84
85void gfree_all( void )
86{
87 gfree_names();
88 gfree_loadparm();
89 gfree_charcnv();
90 gfree_interfaces();
91 gfree_debugsyms();
92}
93
94/*******************************************************************
95 Check if a file exists - call vfs_file_exist for samba files.
96********************************************************************/
97
98bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf,
99 bool fake_dir_create_times)
100{
101 SMB_STRUCT_STAT st;
102 if (!sbuf)
103 sbuf = &st;
104
105 if (sys_stat(fname, sbuf, fake_dir_create_times) != 0)
106 return(False);
107
108 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
109}
110
111/*******************************************************************
112 Check if a unix domain socket exists - call vfs_file_exist for samba files.
113********************************************************************/
114
115bool socket_exist(const char *fname)
116{
117 SMB_STRUCT_STAT st;
118 if (sys_stat(fname, &st, false) != 0)
119 return(False);
120
121 return S_ISSOCK(st.st_ex_mode);
122}
123
124/*******************************************************************
125 Returns the size in bytes of the named given the stat struct.
126********************************************************************/
127
128uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
129{
130 return sbuf->st_ex_size;
131}
132
133/****************************************************************************
134 Check two stats have identical dev and ino fields.
135****************************************************************************/
136
137bool check_same_dev_ino(const SMB_STRUCT_STAT *sbuf1,
138 const SMB_STRUCT_STAT *sbuf2)
139{
140 if (sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
141 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
142 return false;
143 }
144 return true;
145}
146
147/****************************************************************************
148 Check if a stat struct is identical for use.
149****************************************************************************/
150
151bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
152 const SMB_STRUCT_STAT *sbuf2)
153{
154 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
155 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
156 !check_same_dev_ino(sbuf1, sbuf2)) {
157 return false;
158 }
159 return true;
160}
161
162/*******************************************************************
163 Show a smb message structure.
164********************************************************************/
165
166void show_msg(const char *buf)
167{
168 int i;
169 int bcc=0;
170
171 if (!DEBUGLVL(5))
172 return;
173
174 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
175 smb_len(buf),
176 (int)CVAL(buf,smb_com),
177 (int)CVAL(buf,smb_rcls),
178 (int)CVAL(buf,smb_reh),
179 (int)SVAL(buf,smb_err),
180 (int)CVAL(buf,smb_flg),
181 (int)SVAL(buf,smb_flg2)));
182 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
183 (int)SVAL(buf,smb_tid),
184 (int)SVAL(buf,smb_pid),
185 (int)SVAL(buf,smb_uid),
186 (int)SVAL(buf,smb_mid)));
187 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
188
189 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
190 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
191 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
192
193 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
194
195 DEBUGADD(5,("smb_bcc=%d\n",bcc));
196
197 if (DEBUGLEVEL < 10)
198 return;
199
200 if (DEBUGLEVEL < 50)
201 bcc = MIN(bcc, 512);
202
203 dump_data(10, (const uint8_t *)smb_buf_const(buf), bcc);
204}
205
206/*******************************************************************
207 Setup only the byte count for a smb message.
208********************************************************************/
209
210int set_message_bcc(char *buf,int num_bytes)
211{
212 int num_words = CVAL(buf,smb_wct);
213 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
214 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
215 return (smb_size + num_words*2 + num_bytes);
216}
217
218/*******************************************************************
219 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
220 Return the bytes added
221********************************************************************/
222
223ssize_t message_push_blob(uint8_t **outbuf, DATA_BLOB blob)
224{
225 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
226 uint8_t *tmp;
227
228 if (!(tmp = talloc_realloc(NULL, *outbuf, uint8_t, newlen))) {
229 DEBUG(0, ("talloc failed\n"));
230 return -1;
231 }
232 *outbuf = tmp;
233
234 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
235 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
236 return blob.length;
237}
238
239/*******************************************************************
240 Reduce a file name, removing .. elements.
241********************************************************************/
242
243static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
244{
245 char *p = NULL;
246 char *str = NULL;
247
248 DEBUG(3,("dos_clean_name [%s]\n",s));
249
250 /* remove any double slashes */
251 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
252 if (!str) {
253 return NULL;
254 }
255
256 /* Remove leading .\\ characters */
257 if(strncmp(str, ".\\", 2) == 0) {
258 trim_string(str, ".\\", NULL);
259 if(*str == 0) {
260 str = talloc_strdup(ctx, ".\\");
261 if (!str) {
262 return NULL;
263 }
264 }
265 }
266
267 while ((p = strstr_m(str,"\\..\\")) != NULL) {
268 char *s1;
269
270 *p = 0;
271 s1 = p+3;
272
273 if ((p=strrchr_m(str,'\\')) != NULL) {
274 *p = 0;
275 } else {
276 *str = 0;
277 }
278 str = talloc_asprintf(ctx,
279 "%s%s",
280 str,
281 s1);
282 if (!str) {
283 return NULL;
284 }
285 }
286
287 trim_string(str,NULL,"\\..");
288 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
289}
290
291/*******************************************************************
292 Reduce a file name, removing .. elements.
293********************************************************************/
294
295char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
296{
297 char *p = NULL;
298 char *str = NULL;
299
300 DEBUG(3,("unix_clean_name [%s]\n",s));
301
302 /* remove any double slashes */
303 str = talloc_all_string_sub(ctx, s, "//","/");
304 if (!str) {
305 return NULL;
306 }
307
308 /* Remove leading ./ characters */
309 if(strncmp(str, "./", 2) == 0) {
310 trim_string(str, "./", NULL);
311 if(*str == 0) {
312 str = talloc_strdup(ctx, "./");
313 if (!str) {
314 return NULL;
315 }
316 }
317 }
318
319 while ((p = strstr_m(str,"/../")) != NULL) {
320 char *s1;
321
322 *p = 0;
323 s1 = p+3;
324
325 if ((p=strrchr_m(str,'/')) != NULL) {
326 *p = 0;
327 } else {
328 *str = 0;
329 }
330 str = talloc_asprintf(ctx,
331 "%s%s",
332 str,
333 s1);
334 if (!str) {
335 return NULL;
336 }
337 }
338
339 trim_string(str,NULL,"/..");
340 return talloc_all_string_sub(ctx, str, "/./", "/");
341}
342
343char *clean_name(TALLOC_CTX *ctx, const char *s)
344{
345 char *str = dos_clean_name(ctx, s);
346 if (!str) {
347 return NULL;
348 }
349 return unix_clean_name(ctx, str);
350}
351
352/*******************************************************************
353 Write data into an fd at a given offset. Ignore seek errors.
354********************************************************************/
355
356ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, off_t pos)
357{
358 size_t total=0;
359 ssize_t ret;
360
361 if (pos == (off_t)-1) {
362 return write_data(fd, buffer, N);
363 }
364#if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
365 while (total < N) {
366 ret = sys_pwrite(fd,buffer + total,N - total, pos);
367 if (ret == -1 && errno == ESPIPE) {
368 return write_data(fd, buffer + total,N - total);
369 }
370 if (ret == -1) {
371 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
372 return -1;
373 }
374 if (ret == 0) {
375 return total;
376 }
377 total += ret;
378 pos += ret;
379 }
380 return (ssize_t)total;
381#else
382 /* Use lseek and write_data. */
383 if (lseek(fd, pos, SEEK_SET) == -1) {
384 if (errno != ESPIPE) {
385 return -1;
386 }
387 }
388 return write_data(fd, buffer, N);
389#endif
390}
391
392static int reinit_after_fork_pipe[2] = { -1, -1 };
393
394NTSTATUS init_before_fork(void)
395{
396 int ret;
397
398 ret = pipe(reinit_after_fork_pipe);
399 if (ret == -1) {
400 NTSTATUS status;
401
402 status = map_nt_error_from_unix_common(errno);
403
404 DEBUG(0, ("Error creating child_pipe: %s\n",
405 nt_errstr(status)));
406
407 return status;
408 }
409
410 return NT_STATUS_OK;
411}
412
413/**
414 * Detect died parent by detecting EOF on the pipe
415 */
416static void reinit_after_fork_pipe_handler(struct tevent_context *ev,
417 struct tevent_fd *fde,
418 uint16_t flags,
419 void *private_data)
420{
421 char c;
422
423 if (sys_read(reinit_after_fork_pipe[0], &c, 1) != 1) {
424 /*
425 * we have reached EOF on stdin, which means the
426 * parent has exited. Shutdown the server
427 */
428 (void)kill(getpid(), SIGTERM);
429 }
430}
431
432
433NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
434 struct tevent_context *ev_ctx,
435 bool parent_longlived,
436 const char *comment)
437{
438 NTSTATUS status = NT_STATUS_OK;
439
440 if (reinit_after_fork_pipe[1] != -1) {
441 close(reinit_after_fork_pipe[1]);
442 reinit_after_fork_pipe[1] = -1;
443 }
444
445 /* tdb needs special fork handling */
446 if (tdb_reopen_all(parent_longlived ? 1 : 0) != 0) {
447 DEBUG(0,("tdb_reopen_all failed.\n"));
448 status = NT_STATUS_OPEN_FAILED;
449 goto done;
450 }
451
452 if (ev_ctx != NULL) {
453 tevent_set_trace_callback(ev_ctx, NULL, NULL);
454 if (tevent_re_initialise(ev_ctx) != 0) {
455 smb_panic(__location__ ": Failed to re-initialise event context");
456 }
457 }
458
459 if (reinit_after_fork_pipe[0] != -1) {
460 struct tevent_fd *fde;
461
462 fde = tevent_add_fd(ev_ctx, ev_ctx /* TALLOC_CTX */,
463 reinit_after_fork_pipe[0], TEVENT_FD_READ,
464 reinit_after_fork_pipe_handler, NULL);
465 if (fde == NULL) {
466 smb_panic(__location__ ": Failed to add reinit_after_fork pipe event");
467 }
468 }
469
470 if (msg_ctx) {
471 /*
472 * For clustering, we need to re-init our ctdbd connection after the
473 * fork
474 */
475 status = messaging_reinit(msg_ctx);
476 if (!NT_STATUS_IS_OK(status)) {
477 DEBUG(0,("messaging_reinit() failed: %s\n",
478 nt_errstr(status)));
479 }
480 }
481
482 if (comment) {
483 prctl_set_comment(comment);
484 }
485
486 done:
487 return status;
488}
489
490/****************************************************************************
491 (Hopefully) efficient array append.
492****************************************************************************/
493
494void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
495 void *element, void *_array, uint32_t *num_elements,
496 ssize_t *array_size)
497{
498 void **array = (void **)_array;
499
500 if (*array_size < 0) {
501 return;
502 }
503
504 if (*array == NULL) {
505 if (*array_size == 0) {
506 *array_size = 128;
507 }
508
509 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
510 goto error;
511 }
512
513 *array = TALLOC(mem_ctx, element_size * (*array_size));
514 if (*array == NULL) {
515 goto error;
516 }
517 }
518
519 if (*num_elements == *array_size) {
520 *array_size *= 2;
521
522 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
523 goto error;
524 }
525
526 *array = TALLOC_REALLOC(mem_ctx, *array,
527 element_size * (*array_size));
528
529 if (*array == NULL) {
530 goto error;
531 }
532 }
533
534 memcpy((char *)(*array) + element_size*(*num_elements),
535 element, element_size);
536 *num_elements += 1;
537
538 return;
539
540 error:
541 *num_elements = 0;
542 *array_size = -1;
543}
544
545/****************************************************************************
546 Get my own domain name, or "" if we have none.
547****************************************************************************/
548
549char *get_mydnsdomname(TALLOC_CTX *ctx)
550{
551 const char *domname;
552 char *p;
553
554 domname = get_mydnsfullname();
555 if (!domname) {
556 return NULL;
557 }
558
559 p = strchr_m(domname, '.');
560 if (p) {
561 p++;
562 return talloc_strdup(ctx, p);
563 } else {
564 return talloc_strdup(ctx, "");
565 }
566}
567
568#if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
569/******************************************************************
570 Remove any mount options such as -rsize=2048,wsize=2048 etc.
571 Based on a fix from <Thomas.Hepper@icem.de>.
572 Returns a malloc'ed string.
573*******************************************************************/
574
575static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
576{
577 if (*str == '-') {
578 const char *p = str;
579 while(*p && !isspace(*p))
580 p++;
581 while(*p && isspace(*p))
582 p++;
583 if(*p) {
584 return talloc_strdup(ctx, p);
585 }
586 }
587 return NULL;
588}
589
590/*******************************************************************
591 Patch from jkf@soton.ac.uk
592 Split Luke's automount_server into YP lookup and string splitter
593 so can easily implement automount_path().
594 Returns a malloc'ed string.
595*******************************************************************/
596
597#ifdef WITH_NISPLUS_HOME
598char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
599{
600 char *value = NULL;
601
602 char *nis_map = (char *)lp_homedir_map();
603
604 char buffer[NIS_MAXATTRVAL + 1];
605 nis_result *result;
606 nis_object *object;
607 entry_obj *entry;
608
609 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
610 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
611
612 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
613 if (result->status != NIS_SUCCESS) {
614 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
615 } else {
616 object = result->objects.objects_val;
617 if (object->zo_data.zo_type == ENTRY_OBJ) {
618 entry = &object->zo_data.objdata_u.en_data;
619 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
620 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
621
622 value = talloc_strdup(ctx,
623 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
624 if (!value) {
625 nis_freeresult(result);
626 return NULL;
627 }
628 value = talloc_string_sub(ctx,
629 value,
630 "&",
631 user_name);
632 }
633 }
634 }
635 nis_freeresult(result);
636
637 if (value) {
638 value = strip_mount_options(ctx, value);
639 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
640 user_name, value));
641 }
642 return value;
643}
644#else /* WITH_NISPLUS_HOME */
645
646char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
647{
648 char *value = NULL;
649
650 int nis_error; /* returned by yp all functions */
651 char *nis_result; /* yp_match inits this */
652 int nis_result_len; /* and set this */
653 char *nis_domain; /* yp_get_default_domain inits this */
654 char *nis_map = lp_homedir_map(talloc_tos());
655
656 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
657 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
658 return NULL;
659 }
660
661 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
662
663 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
664 strlen(user_name), &nis_result,
665 &nis_result_len)) == 0) {
666 if (nis_result_len > 0 && nis_result[nis_result_len] == '\n') {
667 nis_result[nis_result_len] = '\0';
668 }
669 value = talloc_strdup(ctx, nis_result);
670 if (!value) {
671 return NULL;
672 }
673 value = strip_mount_options(ctx, value);
674 } else if(nis_error == YPERR_KEY) {
675 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
676 user_name, nis_map));
677 DEBUG(3, ("using defaults for server and home directory\n"));
678 } else {
679 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
680 yperr_string(nis_error), user_name, nis_map));
681 }
682
683 if (value) {
684 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
685 }
686 return value;
687}
688#endif /* WITH_NISPLUS_HOME */
689#endif
690
691bool process_exists(const struct server_id pid)
692{
693 return serverid_exists(&pid);
694}
695
696/*******************************************************************
697 Convert a uid into a user name.
698********************************************************************/
699
700const char *uidtoname(uid_t uid)
701{
702 TALLOC_CTX *ctx = talloc_tos();
703 char *name = NULL;
704 struct passwd *pass = NULL;
705
706 pass = getpwuid_alloc(ctx,uid);
707 if (pass) {
708 name = talloc_strdup(ctx,pass->pw_name);
709 TALLOC_FREE(pass);
710 } else {
711 name = talloc_asprintf(ctx,
712 "%ld",
713 (long int)uid);
714 }
715 return name;
716}
717
718/*******************************************************************
719 Convert a gid into a group name.
720********************************************************************/
721
722char *gidtoname(gid_t gid)
723{
724 struct group *grp;
725
726 grp = getgrgid(gid);
727 if (grp) {
728 return talloc_strdup(talloc_tos(), grp->gr_name);
729 }
730 else {
731 return talloc_asprintf(talloc_tos(),
732 "%d",
733 (int)gid);
734 }
735}
736
737/*******************************************************************
738 Convert a user name into a uid.
739********************************************************************/
740
741uid_t nametouid(const char *name)
742{
743 struct passwd *pass;
744 char *p;
745 uid_t u;
746
747 pass = Get_Pwnam_alloc(talloc_tos(), name);
748 if (pass) {
749 u = pass->pw_uid;
750 TALLOC_FREE(pass);
751 return u;
752 }
753
754 u = (uid_t)strtol(name, &p, 0);
755 if ((p != name) && (*p == '\0'))
756 return u;
757
758 return (uid_t)-1;
759}
760
761/*******************************************************************
762 Convert a name to a gid_t if possible. Return -1 if not a group.
763********************************************************************/
764
765gid_t nametogid(const char *name)
766{
767 struct group *grp;
768 char *p;
769 gid_t g;
770
771 g = (gid_t)strtol(name, &p, 0);
772 if ((p != name) && (*p == '\0'))
773 return g;
774
775 grp = getgrnam(name);
776 if (grp)
777 return(grp->gr_gid);
778 return (gid_t)-1;
779}
780
781/*******************************************************************
782 Something really nasty happened - panic !
783********************************************************************/
784
785void smb_panic_s3(const char *why)
786{
787 char *cmd;
788 int result;
789
790 DEBUG(0,("PANIC (pid %llu): %s\n",
791 (unsigned long long)getpid(), why));
792 log_stack_trace();
793
794#if defined(HAVE_PRCTL) && defined(PR_SET_PTRACER)
795 /*
796 * Make sure all children can attach a debugger.
797 */
798 prctl(PR_SET_PTRACER, getpid(), 0, 0, 0);
799#endif
800
801 cmd = lp_panic_action(talloc_tos());
802 if (cmd && *cmd) {
803 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
804 result = system(cmd);
805
806 if (result == -1)
807 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
808 strerror(errno)));
809 else
810 DEBUG(0, ("smb_panic(): action returned status %d\n",
811 WEXITSTATUS(result)));
812 }
813
814 dump_core();
815}
816
817/*******************************************************************
818 Print a backtrace of the stack to the debug log. This function
819 DELIBERATELY LEAKS MEMORY. The expectation is that you should
820 exit shortly after calling it.
821********************************************************************/
822
823#ifdef HAVE_LIBUNWIND_H
824#include <libunwind.h>
825#endif
826
827#ifdef HAVE_EXECINFO_H
828#include <execinfo.h>
829#endif
830
831#ifdef HAVE_LIBEXC_H
832#include <libexc.h>
833#endif
834
835void log_stack_trace(void)
836{
837#ifdef HAVE_LIBUNWIND
838 /* Try to use libunwind before any other technique since on ia64
839 * libunwind correctly walks the stack in more circumstances than
840 * backtrace.
841 */
842 unw_cursor_t cursor;
843 unw_context_t uc;
844 unsigned i = 0;
845
846 char procname[256];
847 unw_word_t ip, sp, off;
848
849 procname[sizeof(procname) - 1] = '\0';
850
851 if (unw_getcontext(&uc) != 0) {
852 goto libunwind_failed;
853 }
854
855 if (unw_init_local(&cursor, &uc) != 0) {
856 goto libunwind_failed;
857 }
858
859 DEBUG(0, ("BACKTRACE:\n"));
860
861 do {
862 ip = sp = 0;
863 unw_get_reg(&cursor, UNW_REG_IP, &ip);
864 unw_get_reg(&cursor, UNW_REG_SP, &sp);
865
866 switch (unw_get_proc_name(&cursor,
867 procname, sizeof(procname) - 1, &off) ) {
868 case 0:
869 /* Name found. */
870 case -UNW_ENOMEM:
871 /* Name truncated. */
872 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
873 i, procname, (long long)off,
874 (long long)ip, (long long) sp));
875 break;
876 default:
877 /* case -UNW_ENOINFO: */
878 /* case -UNW_EUNSPEC: */
879 /* No symbol name found. */
880 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
881 i, "<unknown symbol>",
882 (long long)ip, (long long) sp));
883 }
884 ++i;
885 } while (unw_step(&cursor) > 0);
886
887 return;
888
889libunwind_failed:
890 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
891
892#elif HAVE_BACKTRACE_SYMBOLS
893 void *backtrace_stack[BACKTRACE_STACK_SIZE];
894 size_t backtrace_size;
895 char **backtrace_strings;
896
897 /* get the backtrace (stack frames) */
898 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
899 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
900
901 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
902 (unsigned long)backtrace_size));
903
904 if (backtrace_strings) {
905 int i;
906
907 for (i = 0; i < backtrace_size; i++)
908 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
909
910 /* Leak the backtrace_strings, rather than risk what free() might do */
911 }
912
913#elif HAVE_LIBEXC
914
915 /* The IRIX libexc library provides an API for unwinding the stack. See
916 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
917 * since we are about to abort anyway, it hardly matters.
918 */
919
920#define NAMESIZE 32 /* Arbitrary */
921
922 __uint64_t addrs[BACKTRACE_STACK_SIZE];
923 char * names[BACKTRACE_STACK_SIZE];
924 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
925
926 int i;
927 int levels;
928
929 ZERO_ARRAY(addrs);
930 ZERO_ARRAY(names);
931 ZERO_ARRAY(namebuf);
932
933 /* We need to be root so we can open our /proc entry to walk
934 * our stack. It also helps when we want to dump core.
935 */
936 become_root();
937
938 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
939 names[i] = namebuf + (i * NAMESIZE);
940 }
941
942 levels = trace_back_stack(0, addrs, names,
943 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
944
945 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
946 for (i = 0; i < levels; i++) {
947 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
948 }
949#undef NAMESIZE
950
951#else
952 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
953#endif
954}
955
956/*******************************************************************
957 A readdir wrapper which just returns the file name.
958 ********************************************************************/
959
960const char *readdirname(DIR *p)
961{
962 struct dirent *ptr;
963 char *dname;
964
965 if (!p)
966 return(NULL);
967
968 ptr = (struct dirent *)readdir(p);
969 if (!ptr)
970 return(NULL);
971
972 dname = ptr->d_name;
973
974#ifdef NEXT2
975 if (telldir(p) < 0)
976 return(NULL);
977#endif
978
979#ifdef HAVE_BROKEN_READDIR_NAME
980 /* using /usr/ucb/cc is BAD */
981 dname = dname - 2;
982#endif
983
984 return talloc_strdup(talloc_tos(), dname);
985}
986
987/*******************************************************************
988 Utility function used to decide if the last component
989 of a path matches a (possibly wildcarded) entry in a namelist.
990********************************************************************/
991
992bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
993{
994 const char *last_component;
995
996 /* if we have no list it's obviously not in the path */
997 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
998 return False;
999 }
1000
1001 DEBUG(8, ("is_in_path: %s\n", name));
1002
1003 /* Get the last component of the unix name. */
1004 last_component = strrchr_m(name, '/');
1005 if (!last_component) {
1006 last_component = name;
1007 } else {
1008 last_component++; /* Go past '/' */
1009 }
1010
1011 for(; namelist->name != NULL; namelist++) {
1012 if(namelist->is_wild) {
1013 if (mask_match(last_component, namelist->name, case_sensitive)) {
1014 DEBUG(8,("is_in_path: mask match succeeded\n"));
1015 return True;
1016 }
1017 } else {
1018 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1019 (!case_sensitive && (strcasecmp_m(last_component, namelist->name) == 0))) {
1020 DEBUG(8,("is_in_path: match succeeded\n"));
1021 return True;
1022 }
1023 }
1024 }
1025 DEBUG(8,("is_in_path: match not found\n"));
1026 return False;
1027}
1028
1029/*******************************************************************
1030 Strip a '/' separated list into an array of
1031 name_compare_enties structures suitable for
1032 passing to is_in_path(). We do this for
1033 speed so we can pre-parse all the names in the list
1034 and don't do it for each call to is_in_path().
1035 We also check if the entry contains a wildcard to
1036 remove a potentially expensive call to mask_match
1037 if possible.
1038********************************************************************/
1039
1040void set_namearray(name_compare_entry **ppname_array, const char *namelist_in)
1041{
1042 char *name_end;
1043 char *namelist;
1044 char *namelist_end;
1045 char *nameptr;
1046 int num_entries = 0;
1047 int i;
1048
1049 (*ppname_array) = NULL;
1050
1051 if((namelist_in == NULL ) || ((namelist_in != NULL) && (*namelist_in == '\0')))
1052 return;
1053
1054 namelist = talloc_strdup(talloc_tos(), namelist_in);
1055 if (namelist == NULL) {
1056 DEBUG(0,("set_namearray: talloc fail\n"));
1057 return;
1058 }
1059 nameptr = namelist;
1060
1061 namelist_end = &namelist[strlen(namelist)];
1062
1063 /* We need to make two passes over the string. The
1064 first to count the number of elements, the second
1065 to split it.
1066 */
1067
1068 while(nameptr <= namelist_end) {
1069 if ( *nameptr == '/' ) {
1070 /* cope with multiple (useless) /s) */
1071 nameptr++;
1072 continue;
1073 }
1074 /* anything left? */
1075 if ( *nameptr == '\0' )
1076 break;
1077
1078 /* find the next '/' or consume remaining */
1079 name_end = strchr_m(nameptr, '/');
1080 if (name_end == NULL) {
1081 /* Point nameptr at the terminating '\0' */
1082 nameptr += strlen(nameptr);
1083 } else {
1084 /* next segment please */
1085 nameptr = name_end + 1;
1086 }
1087 num_entries++;
1088 }
1089
1090 if(num_entries == 0) {
1091 talloc_free(namelist);
1092 return;
1093 }
1094
1095 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1096 DEBUG(0,("set_namearray: malloc fail\n"));
1097 talloc_free(namelist);
1098 return;
1099 }
1100
1101 /* Now copy out the names */
1102 nameptr = namelist;
1103 i = 0;
1104 while(nameptr <= namelist_end) {
1105 if ( *nameptr == '/' ) {
1106 /* cope with multiple (useless) /s) */
1107 nameptr++;
1108 continue;
1109 }
1110 /* anything left? */
1111 if ( *nameptr == '\0' )
1112 break;
1113
1114 /* find the next '/' or consume remaining */
1115 name_end = strchr_m(nameptr, '/');
1116 if (name_end != NULL) {
1117 *name_end = '\0';
1118 }
1119
1120 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1121 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1122 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1123 talloc_free(namelist);
1124 return;
1125 }
1126
1127 if (name_end == NULL) {
1128 /* Point nameptr at the terminating '\0' */
1129 nameptr += strlen(nameptr);
1130 } else {
1131 /* next segment please */
1132 nameptr = name_end + 1;
1133 }
1134 i++;
1135 }
1136
1137 (*ppname_array)[i].name = NULL;
1138
1139 talloc_free(namelist);
1140 return;
1141}
1142
1143#undef DBGC_CLASS
1144#define DBGC_CLASS DBGC_LOCKING
1145
1146/****************************************************************************
1147 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1148 is dealt with in posix.c
1149 Returns True if we have information regarding this lock region (and returns
1150 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1151****************************************************************************/
1152
1153bool fcntl_getlock(int fd, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
1154{
1155 struct flock lock;
1156 int ret;
1157
1158 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1159 fd,(double)*poffset,(double)*pcount,*ptype));
1160
1161 lock.l_type = *ptype;
1162 lock.l_whence = SEEK_SET;
1163 lock.l_start = *poffset;
1164 lock.l_len = *pcount;
1165 lock.l_pid = 0;
1166
1167 ret = sys_fcntl_ptr(fd,F_GETLK,&lock);
1168
1169 if (ret == -1) {
1170 int sav = errno;
1171 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1172 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1173 errno = sav;
1174 return False;
1175 }
1176
1177 *ptype = lock.l_type;
1178 *poffset = lock.l_start;
1179 *pcount = lock.l_len;
1180 *ppid = lock.l_pid;
1181
1182 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1183 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1184 return True;
1185}
1186
1187#undef DBGC_CLASS
1188#define DBGC_CLASS DBGC_ALL
1189
1190/*******************************************************************
1191 Is the name specified one of my netbios names.
1192 Returns true if it is equal, false otherwise.
1193********************************************************************/
1194
1195bool is_myname(const char *s)
1196{
1197 int n;
1198 bool ret = False;
1199
1200 for (n=0; my_netbios_names(n); n++) {
1201 const char *nbt_name = my_netbios_names(n);
1202
1203 if (strncasecmp_m(nbt_name, s, MAX_NETBIOSNAME_LEN-1) == 0) {
1204 ret=True;
1205 break;
1206 }
1207 }
1208 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1209 return(ret);
1210}
1211
1212/*******************************************************************
1213 we distinguish between 2K and XP by the "Native Lan Manager" string
1214 WinXP => "Windows 2002 5.1"
1215 WinXP 64bit => "Windows XP 5.2"
1216 Win2k => "Windows 2000 5.0"
1217 NT4 => "Windows NT 4.0"
1218 Win9x => "Windows 4.0"
1219 Windows 2003 doesn't set the native lan manager string but
1220 they do set the domain to "Windows 2003 5.2" (probably a bug).
1221********************************************************************/
1222
1223void ra_lanman_string( const char *native_lanman )
1224{
1225 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1226 set_remote_arch( RA_WINXP );
1227 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1228 set_remote_arch( RA_WINXP64 );
1229 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1230 set_remote_arch( RA_WIN2K3 );
1231}
1232
1233static const char *remote_arch_str;
1234
1235const char *get_remote_arch_str(void)
1236{
1237 if (!remote_arch_str) {
1238 return "UNKNOWN";
1239 }
1240 return remote_arch_str;
1241}
1242
1243/*******************************************************************
1244 Set the horrid remote_arch string based on an enum.
1245********************************************************************/
1246
1247void set_remote_arch(enum remote_arch_types type)
1248{
1249 ra_type = type;
1250 switch( type ) {
1251 case RA_WFWG:
1252 remote_arch_str = "WfWg";
1253 break;
1254 case RA_OS2:
1255 remote_arch_str = "OS2";
1256 break;
1257 case RA_WIN95:
1258 remote_arch_str = "Win95";
1259 break;
1260 case RA_WINNT:
1261 remote_arch_str = "WinNT";
1262 break;
1263 case RA_WIN2K:
1264 remote_arch_str = "Win2K";
1265 break;
1266 case RA_WINXP:
1267 remote_arch_str = "WinXP";
1268 break;
1269 case RA_WINXP64:
1270 remote_arch_str = "WinXP64";
1271 break;
1272 case RA_WIN2K3:
1273 remote_arch_str = "Win2K3";
1274 break;
1275 case RA_VISTA:
1276 remote_arch_str = "Vista";
1277 break;
1278 case RA_SAMBA:
1279 remote_arch_str = "Samba";
1280 break;
1281 case RA_CIFSFS:
1282 remote_arch_str = "CIFSFS";
1283 break;
1284 case RA_OSX:
1285 remote_arch_str = "OSX";
1286 break;
1287 default:
1288 ra_type = RA_UNKNOWN;
1289 remote_arch_str = "UNKNOWN";
1290 break;
1291 }
1292
1293 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1294 remote_arch_str));
1295}
1296
1297/*******************************************************************
1298 Get the remote_arch type.
1299********************************************************************/
1300
1301enum remote_arch_types get_remote_arch(void)
1302{
1303 return ra_type;
1304}
1305
1306const char *tab_depth(int level, int depth)
1307{
1308 if( CHECK_DEBUGLVL(level) ) {
1309 dbgtext("%*s", depth*4, "");
1310 }
1311 return "";
1312}
1313
1314/*****************************************************************************
1315 Provide a checksum on a string
1316
1317 Input: s - the null-terminated character string for which the checksum
1318 will be calculated.
1319
1320 Output: The checksum value calculated for s.
1321*****************************************************************************/
1322
1323int str_checksum(const char *s)
1324{
1325 TDB_DATA key;
1326 if (s == NULL)
1327 return 0;
1328
1329 key = (TDB_DATA) { .dptr = discard_const_p(uint8_t, s),
1330 .dsize = strlen(s) };
1331
1332 return tdb_jenkins_hash(&key);
1333}
1334
1335/*****************************************************************
1336 Zero a memory area then free it. Used to catch bugs faster.
1337*****************************************************************/
1338
1339void zero_free(void *p, size_t size)
1340{
1341 memset(p, 0, size);
1342 SAFE_FREE(p);
1343}
1344
1345/*****************************************************************
1346 Set our open file limit to a requested max and return the limit.
1347*****************************************************************/
1348
1349int set_maxfiles(int requested_max)
1350{
1351#if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1352 struct rlimit rlp;
1353 int saved_current_limit;
1354
1355 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1356 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1357 strerror(errno) ));
1358 /* just guess... */
1359 return requested_max;
1360 }
1361
1362 /*
1363 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1364 * account for the extra fd we need
1365 * as well as the log files and standard
1366 * handles etc. Save the limit we want to set in case
1367 * we are running on an OS that doesn't support this limit (AIX)
1368 * which always returns RLIM_INFINITY for rlp.rlim_max.
1369 */
1370
1371 /* Try raising the hard (max) limit to the requested amount. */
1372
1373#if defined(RLIM_INFINITY)
1374 if (rlp.rlim_max != RLIM_INFINITY) {
1375 int orig_max = rlp.rlim_max;
1376
1377 if ( rlp.rlim_max < requested_max )
1378 rlp.rlim_max = requested_max;
1379
1380 /* This failing is not an error - many systems (Linux) don't
1381 support our default request of 10,000 open files. JRA. */
1382
1383 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1384 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
1385 (int)rlp.rlim_max, strerror(errno) ));
1386
1387 /* Set failed - restore original value from get. */
1388 rlp.rlim_max = orig_max;
1389 }
1390 }
1391#endif
1392
1393 /* Now try setting the soft (current) limit. */
1394
1395 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
1396
1397 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1398 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
1399 (int)rlp.rlim_cur, strerror(errno) ));
1400 /* just guess... */
1401 return saved_current_limit;
1402 }
1403
1404 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1405 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
1406 strerror(errno) ));
1407 /* just guess... */
1408 return saved_current_limit;
1409 }
1410
1411#if defined(RLIM_INFINITY)
1412 if(rlp.rlim_cur == RLIM_INFINITY)
1413 return saved_current_limit;
1414#endif
1415
1416 if((int)rlp.rlim_cur > saved_current_limit)
1417 return saved_current_limit;
1418
1419 return rlp.rlim_cur;
1420#else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
1421 /*
1422 * No way to know - just guess...
1423 */
1424 return requested_max;
1425#endif
1426}
1427
1428/*****************************************************************
1429 malloc that aborts with smb_panic on fail or zero size.
1430 *****************************************************************/
1431
1432void *smb_xmalloc_array(size_t size, unsigned int count)
1433{
1434 void *p;
1435 if (size == 0) {
1436 smb_panic("smb_xmalloc_array: called with zero size");
1437 }
1438 if (count >= MAX_ALLOC_SIZE/size) {
1439 smb_panic("smb_xmalloc_array: alloc size too large");
1440 }
1441 if ((p = SMB_MALLOC(size*count)) == NULL) {
1442 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
1443 (unsigned long)size, (unsigned long)count));
1444 smb_panic("smb_xmalloc_array: malloc failed");
1445 }
1446 return p;
1447}
1448
1449/*
1450 vasprintf that aborts on malloc fail
1451*/
1452
1453 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
1454{
1455 int n;
1456 va_list ap2;
1457
1458 va_copy(ap2, ap);
1459
1460 n = vasprintf(ptr, format, ap2);
1461 va_end(ap2);
1462 if (n == -1 || ! *ptr) {
1463 smb_panic("smb_xvasprintf: out of memory");
1464 }
1465 return n;
1466}
1467
1468/*****************************************************************
1469 Get local hostname and cache result.
1470*****************************************************************/
1471
1472char *myhostname(void)
1473{
1474 static char *ret;
1475 if (ret == NULL) {
1476 ret = get_myname(NULL);
1477 }
1478 return ret;
1479}
1480
1481/*****************************************************************
1482 Get local hostname and cache result.
1483*****************************************************************/
1484
1485char *myhostname_upper(void)
1486{
1487 static char *ret;
1488 if (ret == NULL) {
1489 char *name = get_myname(NULL);
1490 if (name == NULL) {
1491 return NULL;
1492 }
1493 ret = strupper_talloc(NULL, name);
1494 talloc_free(name);
1495 }
1496 return ret;
1497}
1498
1499/*******************************************************************
1500 Given a filename - get its directory name
1501********************************************************************/
1502
1503bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
1504 const char **name)
1505{
1506 char *p;
1507 ptrdiff_t len;
1508
1509 p = strrchr_m(dir, '/'); /* Find final '/', if any */
1510
1511 if (p == NULL) {
1512 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
1513 return False;
1514 }
1515 if (name) {
1516 *name = dir;
1517 }
1518 return True;
1519 }
1520
1521 len = p-dir;
1522
1523 if (!(*parent = (char *)talloc_memdup(mem_ctx, dir, len+1))) {
1524 return False;
1525 }
1526 (*parent)[len] = '\0';
1527
1528 if (name) {
1529 *name = p+1;
1530 }
1531 return True;
1532}
1533
1534/*******************************************************************
1535 Determine if a pattern contains any Microsoft wildcard characters.
1536*******************************************************************/
1537
1538bool ms_has_wild(const char *s)
1539{
1540 char c;
1541
1542 while ((c = *s++)) {
1543 switch (c) {
1544 case '*':
1545 case '?':
1546 case '<':
1547 case '>':
1548 case '"':
1549 return True;
1550 }
1551 }
1552 return False;
1553}
1554
1555bool ms_has_wild_w(const smb_ucs2_t *s)
1556{
1557 smb_ucs2_t c;
1558 if (!s) return False;
1559 while ((c = *s++)) {
1560 switch (c) {
1561 case UCS2_CHAR('*'):
1562 case UCS2_CHAR('?'):
1563 case UCS2_CHAR('<'):
1564 case UCS2_CHAR('>'):
1565 case UCS2_CHAR('"'):
1566 return True;
1567 }
1568 }
1569 return False;
1570}
1571
1572/*******************************************************************
1573 A wrapper that handles case sensitivity and the special handling
1574 of the ".." name.
1575*******************************************************************/
1576
1577bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
1578{
1579 if (ISDOTDOT(string))
1580 string = ".";
1581 if (ISDOT(pattern))
1582 return False;
1583
1584 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
1585}
1586
1587/*******************************************************************
1588 A wrapper that handles case sensitivity and the special handling
1589 of the ".." name. Varient that is only called by old search code which requires
1590 pattern translation.
1591*******************************************************************/
1592
1593bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
1594{
1595 if (ISDOTDOT(string))
1596 string = ".";
1597 if (ISDOT(pattern))
1598 return False;
1599
1600 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
1601}
1602
1603/*******************************************************************
1604 A wrapper that handles a list of patters and calls mask_match()
1605 on each. Returns True if any of the patterns match.
1606*******************************************************************/
1607
1608bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
1609{
1610 while (listLen-- > 0) {
1611 if (mask_match(string, *list++, is_case_sensitive))
1612 return True;
1613 }
1614 return False;
1615}
1616
1617/*********************************************************
1618 Recursive routine that is called by unix_wild_match.
1619*********************************************************/
1620
1621static bool unix_do_match(const char *regexp, const char *str)
1622{
1623 const char *p;
1624
1625 for( p = regexp; *p && *str; ) {
1626
1627 switch(*p) {
1628 case '?':
1629 str++;
1630 p++;
1631 break;
1632
1633 case '*':
1634
1635 /*
1636 * Look for a character matching
1637 * the one after the '*'.
1638 */
1639 p++;
1640 if(!*p)
1641 return true; /* Automatic match */
1642 while(*str) {
1643
1644 while(*str && (*p != *str))
1645 str++;
1646
1647 /*
1648 * Patch from weidel@multichart.de. In the case of the regexp
1649 * '*XX*' we want to ensure there are at least 2 'X' characters
1650 * in the string after the '*' for a match to be made.
1651 */
1652
1653 {
1654 int matchcount=0;
1655
1656 /*
1657 * Eat all the characters that match, but count how many there were.
1658 */
1659
1660 while(*str && (*p == *str)) {
1661 str++;
1662 matchcount++;
1663 }
1664
1665 /*
1666 * Now check that if the regexp had n identical characters that
1667 * matchcount had at least that many matches.
1668 */
1669
1670 while ( *(p+1) && (*(p+1) == *p)) {
1671 p++;
1672 matchcount--;
1673 }
1674
1675 if ( matchcount <= 0 )
1676 return false;
1677 }
1678
1679 str--; /* We've eaten the match char after the '*' */
1680
1681 if(unix_do_match(p, str))
1682 return true;
1683
1684 if(!*str)
1685 return false;
1686 else
1687 str++;
1688 }
1689 return false;
1690
1691 default:
1692 if(*str != *p)
1693 return false;
1694 str++;
1695 p++;
1696 break;
1697 }
1698 }
1699
1700 if(!*p && !*str)
1701 return true;
1702
1703 if (!*p && str[0] == '.' && str[1] == 0)
1704 return true;
1705
1706 if (!*str && *p == '?') {
1707 while (*p == '?')
1708 p++;
1709 return(!*p);
1710 }
1711
1712 if(!*str && (*p == '*' && p[1] == '\0'))
1713 return true;
1714
1715 return false;
1716}
1717
1718/*******************************************************************
1719 Simple case insensitive interface to a UNIX wildcard matcher.
1720 Returns True if match, False if not.
1721*******************************************************************/
1722
1723bool unix_wild_match(const char *pattern, const char *string)
1724{
1725 TALLOC_CTX *ctx = talloc_stackframe();
1726 char *p2;
1727 char *s2;
1728 char *p;
1729 bool ret = false;
1730
1731 p2 = talloc_strdup(ctx,pattern);
1732 s2 = talloc_strdup(ctx,string);
1733 if (!p2 || !s2) {
1734 TALLOC_FREE(ctx);
1735 return false;
1736 }
1737 if (!strlower_m(p2)) {
1738 TALLOC_FREE(ctx);
1739 return false;
1740 }
1741 if (!strlower_m(s2)) {
1742 TALLOC_FREE(ctx);
1743 return false;
1744 }
1745
1746 /* Remove any *? and ** from the pattern as they are meaningless */
1747 for(p = p2; *p; p++) {
1748 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
1749 memmove(&p[1], &p[2], strlen(&p[2])+1);
1750 }
1751 }
1752
1753 if (strequal(p2,"*")) {
1754 TALLOC_FREE(ctx);
1755 return true;
1756 }
1757
1758 ret = unix_do_match(p2, s2);
1759 TALLOC_FREE(ctx);
1760 return ret;
1761}
1762
1763/**********************************************************************
1764 Converts a name to a fully qualified domain name.
1765 Returns true if lookup succeeded, false if not (then fqdn is set to name)
1766 Uses getaddrinfo() with AI_CANONNAME flag to obtain the official
1767 canonical name of the host. getaddrinfo() may use a variety of sources
1768 including /etc/hosts to obtain the domainname. It expects aliases in
1769 /etc/hosts to NOT be the FQDN. The FQDN should come first.
1770************************************************************************/
1771
1772bool name_to_fqdn(fstring fqdn, const char *name)
1773{
1774 char *full = NULL;
1775 struct addrinfo hints;
1776 struct addrinfo *result;
1777 int s;
1778
1779 /* Configure hints to obtain canonical name */
1780
1781 memset(&hints, 0, sizeof(struct addrinfo));
1782 hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
1783 hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */
1784 hints.ai_flags = AI_CANONNAME; /* Get host's FQDN */
1785 hints.ai_protocol = 0; /* Any protocol */
1786
1787 s = getaddrinfo(name, NULL, &hints, &result);
1788 if (s != 0) {
1789 DEBUG(1, ("getaddrinfo: %s\n", gai_strerror(s)));
1790 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
1791 fstrcpy(fqdn, name);
1792 return false;
1793 }
1794 full = result->ai_canonname;
1795
1796 /* Find out if the FQDN is returned as an alias
1797 * to cope with /etc/hosts files where the first
1798 * name is not the FQDN but the short name.
1799 * getaddrinfo provides no easy way of handling aliases
1800 * in /etc/hosts. Users should make sure the FQDN
1801 * comes first in /etc/hosts. */
1802 if (full && (! strchr_m(full, '.'))) {
1803 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
1804 DEBUGADD(1, (" Full qualified domain names (FQDNs) should not be specified\n"));
1805 DEBUGADD(1, (" as an alias in /etc/hosts. FQDN should be the first name\n"));
1806 DEBUGADD(1, (" prior to any aliases.\n"));
1807 }
1808 if (full && (strcasecmp_m(full, "localhost.localdomain") == 0)) {
1809 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
1810 DEBUGADD(1, (" Specifying the machine hostname for address 127.0.0.1 may lead\n"));
1811 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
1812 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
1813 }
1814
1815 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
1816 fstrcpy(fqdn, full);
1817 freeaddrinfo(result); /* No longer needed */
1818 return true;
1819}
1820
1821uint32_t map_share_mode_to_deny_mode(uint32_t share_access, uint32_t private_options)
1822{
1823 switch (share_access & ~FILE_SHARE_DELETE) {
1824 case FILE_SHARE_NONE:
1825 return DENY_ALL;
1826 case FILE_SHARE_READ:
1827 return DENY_WRITE;
1828 case FILE_SHARE_WRITE:
1829 return DENY_READ;
1830 case FILE_SHARE_READ|FILE_SHARE_WRITE:
1831 return DENY_NONE;
1832 }
1833 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
1834 return DENY_DOS;
1835 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
1836 return DENY_FCB;
1837 }
1838
1839 return (uint32_t)-1;
1840}
1841
1842struct server_id interpret_pid(const char *pid_string)
1843{
1844 return server_id_from_string(get_my_vnn(), pid_string);
1845}
1846
1847/****************************************************************
1848 Check if an offset into a buffer is safe.
1849 If this returns True it's safe to indirect into the byte at
1850 pointer ptr+off.
1851****************************************************************/
1852
1853bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
1854{
1855 const char *end_base = buf_base + buf_len;
1856 char *end_ptr = ptr + off;
1857
1858 if (!buf_base || !ptr) {
1859 return False;
1860 }
1861
1862 if (end_base < buf_base || end_ptr < ptr) {
1863 return False; /* wrap. */
1864 }
1865
1866 if (end_ptr < end_base) {
1867 return True;
1868 }
1869 return False;
1870}
1871
1872/****************************************************************
1873 Return a safe pointer into a buffer, or NULL.
1874****************************************************************/
1875
1876char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
1877{
1878 return is_offset_safe(buf_base, buf_len, ptr, off) ?
1879 ptr + off : NULL;
1880}
1881
1882/****************************************************************
1883 Return a safe pointer into a string within a buffer, or NULL.
1884****************************************************************/
1885
1886char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
1887{
1888 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
1889 return NULL;
1890 }
1891 /* Check if a valid string exists at this offset. */
1892 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
1893 return NULL;
1894 }
1895 return ptr + off;
1896}
1897
1898/****************************************************************
1899 Return an SVAL at a pointer, or failval if beyond the end.
1900****************************************************************/
1901
1902int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
1903{
1904 /*
1905 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
1906 * NOT ptr[2].
1907 */
1908 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
1909 return failval;
1910 }
1911 return SVAL(ptr,off);
1912}
1913
1914/****************************************************************
1915 Return an IVAL at a pointer, or failval if beyond the end.
1916****************************************************************/
1917
1918int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
1919{
1920 /*
1921 * Note we use off+3 here, not off+4 as IVAL accesses
1922 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
1923 */
1924 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
1925 return failval;
1926 }
1927 return IVAL(ptr,off);
1928}
1929
1930/****************************************************************
1931 Split DOM\user into DOM and user. Do not mix with winbind variants of that
1932 call (they take care of winbind separator and other winbind specific settings).
1933****************************************************************/
1934
1935void split_domain_user(TALLOC_CTX *mem_ctx,
1936 const char *full_name,
1937 char **domain,
1938 char **user)
1939{
1940 const char *p = NULL;
1941
1942 p = strchr_m(full_name, '\\');
1943
1944 if (p != NULL) {
1945 *domain = talloc_strndup(mem_ctx, full_name,
1946 PTR_DIFF(p, full_name));
1947 *user = talloc_strdup(mem_ctx, p+1);
1948 } else {
1949 *domain = talloc_strdup(mem_ctx, "");
1950 *user = talloc_strdup(mem_ctx, full_name);
1951 }
1952}
1953
1954/****************************************************************
1955 strip off leading '\\' from a hostname
1956****************************************************************/
1957
1958const char *strip_hostname(const char *s)
1959{
1960 if (!s) {
1961 return NULL;
1962 }
1963
1964 if (strlen_m(s) < 3) {
1965 return s;
1966 }
1967
1968 if (s[0] == '\\') s++;
1969 if (s[0] == '\\') s++;
1970
1971 return s;
1972}
1973
1974bool any_nt_status_not_ok(NTSTATUS err1, NTSTATUS err2, NTSTATUS *result)
1975{
1976 if (!NT_STATUS_IS_OK(err1)) {
1977 *result = err1;
1978 return true;
1979 }
1980 if (!NT_STATUS_IS_OK(err2)) {
1981 *result = err2;
1982 return true;
1983 }
1984 return false;
1985}
1986
1987int timeval_to_msec(struct timeval t)
1988{
1989 return t.tv_sec * 1000 + (t.tv_usec+999) / 1000;
1990}
1991
1992/*******************************************************************
1993 Check a given DOS pathname is valid for a share.
1994********************************************************************/
1995
1996char *valid_share_pathname(TALLOC_CTX *ctx, const char *dos_pathname)
1997{
1998 char *ptr = NULL;
1999
2000 if (!dos_pathname) {
2001 return NULL;
2002 }
2003
2004 ptr = talloc_strdup(ctx, dos_pathname);
2005 if (!ptr) {
2006 return NULL;
2007 }
2008 /* Convert any '\' paths to '/' */
2009 unix_format(ptr);
2010 ptr = unix_clean_name(ctx, ptr);
2011 if (!ptr) {
2012 return NULL;
2013 }
2014
2015 /* NT is braindead - it wants a C: prefix to a pathname ! So strip it. */
2016 if (strlen(ptr) > 2 && ptr[1] == ':' && ptr[0] != '/')
2017 ptr += 2;
2018
2019 /* Only absolute paths allowed. */
2020 if (*ptr != '/')
2021 return NULL;
2022
2023 return ptr;
2024}
2025
2026/*******************************************************************
2027 Return True if the filename is one of the special executable types.
2028********************************************************************/
2029
2030bool is_executable(const char *fname)
2031{
2032 if ((fname = strrchr_m(fname,'.'))) {
2033 if (strequal(fname,".com") ||
2034 strequal(fname,".dll") ||
2035 strequal(fname,".exe") ||
2036 strequal(fname,".sym")) {
2037 return True;
2038 }
2039 }
2040 return False;
2041}
2042
2043/****************************************************************************
2044 Open a file with a share mode - old openX method - map into NTCreate.
2045****************************************************************************/
2046
2047bool map_open_params_to_ntcreate(const char *smb_base_fname,
2048 int deny_mode, int open_func,
2049 uint32_t *paccess_mask,
2050 uint32_t *pshare_mode,
2051 uint32_t *pcreate_disposition,
2052 uint32_t *pcreate_options,
2053 uint32_t *pprivate_flags)
2054{
2055 uint32_t access_mask;
2056 uint32_t share_mode;
2057 uint32_t create_disposition;
2058 uint32_t create_options = FILE_NON_DIRECTORY_FILE;
2059 uint32_t private_flags = 0;
2060
2061 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
2062 "open_func = 0x%x\n",
2063 smb_base_fname, (unsigned int)deny_mode,
2064 (unsigned int)open_func ));
2065
2066 /* Create the NT compatible access_mask. */
2067 switch (GET_OPENX_MODE(deny_mode)) {
2068 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
2069 case DOS_OPEN_RDONLY:
2070 access_mask = FILE_GENERIC_READ;
2071 break;
2072 case DOS_OPEN_WRONLY:
2073 access_mask = FILE_GENERIC_WRITE;
2074 break;
2075 case DOS_OPEN_RDWR:
2076 case DOS_OPEN_FCB:
2077 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
2078 break;
2079 default:
2080 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
2081 (unsigned int)GET_OPENX_MODE(deny_mode)));
2082 return False;
2083 }
2084
2085 /* Create the NT compatible create_disposition. */
2086 switch (open_func) {
2087 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
2088 create_disposition = FILE_CREATE;
2089 break;
2090
2091 case OPENX_FILE_EXISTS_OPEN:
2092 create_disposition = FILE_OPEN;
2093 break;
2094
2095 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
2096 create_disposition = FILE_OPEN_IF;
2097 break;
2098
2099 case OPENX_FILE_EXISTS_TRUNCATE:
2100 create_disposition = FILE_OVERWRITE;
2101 break;
2102
2103 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
2104 create_disposition = FILE_OVERWRITE_IF;
2105 break;
2106
2107 default:
2108 /* From samba4 - to be confirmed. */
2109 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
2110 create_disposition = FILE_CREATE;
2111 break;
2112 }
2113 DEBUG(10,("map_open_params_to_ntcreate: bad "
2114 "open_func 0x%x\n", (unsigned int)open_func));
2115 return False;
2116 }
2117
2118 /* Create the NT compatible share modes. */
2119 switch (GET_DENY_MODE(deny_mode)) {
2120 case DENY_ALL:
2121 share_mode = FILE_SHARE_NONE;
2122 break;
2123
2124 case DENY_WRITE:
2125 share_mode = FILE_SHARE_READ;
2126 break;
2127
2128 case DENY_READ:
2129 share_mode = FILE_SHARE_WRITE;
2130 break;
2131
2132 case DENY_NONE:
2133 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
2134 break;
2135
2136 case DENY_DOS:
2137 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
2138 if (is_executable(smb_base_fname)) {
2139 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
2140 } else {
2141 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
2142 share_mode = FILE_SHARE_READ;
2143 } else {
2144 share_mode = FILE_SHARE_NONE;
2145 }
2146 }
2147 break;
2148
2149 case DENY_FCB:
2150 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
2151 share_mode = FILE_SHARE_NONE;
2152 break;
2153
2154 default:
2155 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
2156 (unsigned int)GET_DENY_MODE(deny_mode) ));
2157 return False;
2158 }
2159
2160 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
2161 "share_mode = 0x%x, create_disposition = 0x%x, "
2162 "create_options = 0x%x private_flags = 0x%x\n",
2163 smb_base_fname,
2164 (unsigned int)access_mask,
2165 (unsigned int)share_mode,
2166 (unsigned int)create_disposition,
2167 (unsigned int)create_options,
2168 (unsigned int)private_flags));
2169
2170 if (paccess_mask) {
2171 *paccess_mask = access_mask;
2172 }
2173 if (pshare_mode) {
2174 *pshare_mode = share_mode;
2175 }
2176 if (pcreate_disposition) {
2177 *pcreate_disposition = create_disposition;
2178 }
2179 if (pcreate_options) {
2180 *pcreate_options = create_options;
2181 }
2182 if (pprivate_flags) {
2183 *pprivate_flags = private_flags;
2184 }
2185
2186 return True;
2187
2188}
2189
2190/*************************************************************************
2191 Return a talloced copy of a struct security_unix_token. NULL on fail.
2192*************************************************************************/
2193
2194struct security_unix_token *copy_unix_token(TALLOC_CTX *ctx, const struct security_unix_token *tok)
2195{
2196 struct security_unix_token *cpy;
2197
2198 cpy = talloc(ctx, struct security_unix_token);
2199 if (!cpy) {
2200 return NULL;
2201 }
2202
2203 cpy->uid = tok->uid;
2204 cpy->gid = tok->gid;
2205 cpy->ngroups = tok->ngroups;
2206 if (tok->ngroups) {
2207 /* Make this a talloc child of cpy. */
2208 cpy->groups = (gid_t *)talloc_memdup(
2209 cpy, tok->groups, tok->ngroups * sizeof(gid_t));
2210 if (!cpy->groups) {
2211 TALLOC_FREE(cpy);
2212 return NULL;
2213 }
2214 } else {
2215 cpy->groups = NULL;
2216 }
2217 return cpy;
2218}
2219
2220/****************************************************************************
2221 Check that a file matches a particular file type.
2222****************************************************************************/
2223
2224bool dir_check_ftype(uint32_t mode, uint32_t dirtype)
2225{
2226 uint32_t mask;
2227
2228 /* Check the "may have" search bits. */
2229 if (((mode & ~dirtype) &
2230 (FILE_ATTRIBUTE_HIDDEN |
2231 FILE_ATTRIBUTE_SYSTEM |
2232 FILE_ATTRIBUTE_DIRECTORY)) != 0) {
2233 return false;
2234 }
2235
2236 /* Check the "must have" bits,
2237 which are the may have bits shifted eight */
2238 /* If must have bit is set, the file/dir can
2239 not be returned in search unless the matching
2240 file attribute is set */
2241 mask = ((dirtype >> 8) & (FILE_ATTRIBUTE_DIRECTORY|
2242 FILE_ATTRIBUTE_ARCHIVE|
2243 FILE_ATTRIBUTE_READONLY|
2244 FILE_ATTRIBUTE_HIDDEN|
2245 FILE_ATTRIBUTE_SYSTEM)); /* & 0x37 */
2246 if(mask) {
2247 if((mask & (mode & (FILE_ATTRIBUTE_DIRECTORY|
2248 FILE_ATTRIBUTE_ARCHIVE|
2249 FILE_ATTRIBUTE_READONLY|
2250 FILE_ATTRIBUTE_HIDDEN|
2251 FILE_ATTRIBUTE_SYSTEM))) == mask) {
2252 /* check if matching attribute present */
2253 return true;
2254 } else {
2255 return false;
2256 }
2257 }
2258
2259 return true;
2260}
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