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
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.
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.
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/>.
26 extern char *global_clobber_region_function;
27 extern unsigned int global_clobber_region_line;
29 /* Max allowable allococation - 256mb - 0x10000000 */
30 #define MAX_ALLOC_SIZE (1024*1024*256)
32 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
33 #ifdef WITH_NISPLUS_HOME
34 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
36 * The following lines are needed due to buggy include files
37 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
38 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
39 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
40 * an enum in /usr/include/rpcsvc/nis.h.
47 #if defined(GROUP_OBJ)
51 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
53 #include <rpcsvc/nis.h>
55 #endif /* WITH_NISPLUS_HOME */
56 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
58 enum protocol_types Protocol = PROTOCOL_COREPLUS;
60 static enum remote_arch_types ra_type = RA_UNKNOWN;
62 /***********************************************************************
63 Definitions for all names.
64 ***********************************************************************/
66 static char *smb_myname;
67 static char *smb_myworkgroup;
68 static char *smb_scope;
69 static int smb_num_netbios_names;
70 static char **smb_my_netbios_names;
72 /***********************************************************************
73 Allocate and set myname. Ensure upper case.
74 ***********************************************************************/
76 bool set_global_myname(const char *myname)
78 SAFE_FREE(smb_myname);
79 smb_myname = SMB_STRDUP(myname);
82 strupper_m(smb_myname);
86 const char *global_myname(void)
91 /***********************************************************************
92 Allocate and set myworkgroup. Ensure upper case.
93 ***********************************************************************/
95 bool set_global_myworkgroup(const char *myworkgroup)
97 SAFE_FREE(smb_myworkgroup);
98 smb_myworkgroup = SMB_STRDUP(myworkgroup);
101 strupper_m(smb_myworkgroup);
105 const char *lp_workgroup(void)
107 return smb_myworkgroup;
110 /***********************************************************************
111 Allocate and set scope. Ensure upper case.
112 ***********************************************************************/
114 bool set_global_scope(const char *scope)
116 SAFE_FREE(smb_scope);
117 smb_scope = SMB_STRDUP(scope);
120 strupper_m(smb_scope);
124 /*********************************************************************
125 Ensure scope is never null string.
126 *********************************************************************/
128 const char *global_scope(void)
131 set_global_scope("");
135 static void free_netbios_names_array(void)
139 for (i = 0; i < smb_num_netbios_names; i++)
140 SAFE_FREE(smb_my_netbios_names[i]);
142 SAFE_FREE(smb_my_netbios_names);
143 smb_num_netbios_names = 0;
146 static bool allocate_my_netbios_names_array(size_t number)
148 free_netbios_names_array();
150 smb_num_netbios_names = number + 1;
151 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
153 if (!smb_my_netbios_names)
156 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
160 static bool set_my_netbios_names(const char *name, int i)
162 SAFE_FREE(smb_my_netbios_names[i]);
164 smb_my_netbios_names[i] = SMB_STRDUP(name);
165 if (!smb_my_netbios_names[i])
167 strupper_m(smb_my_netbios_names[i]);
171 /***********************************************************************
172 Free memory allocated to global objects
173 ***********************************************************************/
175 void gfree_names(void)
177 SAFE_FREE( smb_myname );
178 SAFE_FREE( smb_myworkgroup );
179 SAFE_FREE( smb_scope );
180 free_netbios_names_array();
181 free_local_machine_name();
184 void gfree_all( void )
194 const char *my_netbios_names(int i)
196 return smb_my_netbios_names[i];
199 bool set_netbios_aliases(const char **str_array)
203 /* Work out the max number of netbios aliases that we have */
204 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
207 if ( global_myname() && *global_myname())
210 /* Allocate space for the netbios aliases */
211 if (!allocate_my_netbios_names_array(namecount))
214 /* Use the global_myname string first */
216 if ( global_myname() && *global_myname()) {
217 set_my_netbios_names( global_myname(), namecount );
223 for ( i = 0; str_array[i] != NULL; i++) {
225 bool duplicate = False;
227 /* Look for duplicates */
228 for( n=0; n<namecount; n++ ) {
229 if( strequal( str_array[i], my_netbios_names(n) ) ) {
235 if (!set_my_netbios_names(str_array[i], namecount))
244 /****************************************************************************
245 Common name initialization code.
246 ****************************************************************************/
248 bool init_names(void)
252 if (global_myname() == NULL || *global_myname() == '\0') {
253 if (!set_global_myname(myhostname())) {
254 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
259 if (!set_netbios_aliases(lp_netbios_aliases())) {
260 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
264 set_local_machine_name(global_myname(),false);
266 DEBUG( 5, ("Netbios name list:-\n") );
267 for( n=0; my_netbios_names(n); n++ ) {
268 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
269 n, my_netbios_names(n) ) );
275 /**************************************************************************n
276 Code to cope with username/password auth options from the commandline.
277 Used mainly in client tools.
278 ****************************************************************************/
280 struct user_auth_info *user_auth_info_init(TALLOC_CTX *mem_ctx)
282 struct user_auth_info *result;
284 result = TALLOC_ZERO_P(mem_ctx, struct user_auth_info);
285 if (result == NULL) {
289 result->signing_state = Undefined;
293 const char *get_cmdline_auth_info_username(const struct user_auth_info *auth_info)
295 if (!auth_info->username) {
298 return auth_info->username;
301 void set_cmdline_auth_info_username(struct user_auth_info *auth_info,
302 const char *username)
304 TALLOC_FREE(auth_info->username);
305 auth_info->username = talloc_strdup(auth_info, username);
306 if (!auth_info->username) {
311 const char *get_cmdline_auth_info_password(const struct user_auth_info *auth_info)
313 if (!auth_info->password) {
316 return auth_info->password;
319 void set_cmdline_auth_info_password(struct user_auth_info *auth_info,
320 const char *password)
322 TALLOC_FREE(auth_info->password);
323 if (password == NULL) {
326 auth_info->password = talloc_strdup(auth_info, password);
327 if (!auth_info->password) {
330 auth_info->got_pass = true;
333 bool set_cmdline_auth_info_signing_state(struct user_auth_info *auth_info,
336 auth_info->signing_state = -1;
337 if (strequal(arg, "off") || strequal(arg, "no") ||
338 strequal(arg, "false")) {
339 auth_info->signing_state = false;
340 } else if (strequal(arg, "on") || strequal(arg, "yes") ||
341 strequal(arg, "true") || strequal(arg, "auto")) {
342 auth_info->signing_state = true;
343 } else if (strequal(arg, "force") || strequal(arg, "required") ||
344 strequal(arg, "forced")) {
345 auth_info->signing_state = Required;
352 int get_cmdline_auth_info_signing_state(const struct user_auth_info *auth_info)
354 return auth_info->signing_state;
357 void set_cmdline_auth_info_use_kerberos(struct user_auth_info *auth_info,
360 auth_info->use_kerberos = b;
363 bool get_cmdline_auth_info_use_kerberos(const struct user_auth_info *auth_info)
365 return auth_info->use_kerberos;
368 void set_cmdline_auth_info_fallback_after_kerberos(struct user_auth_info *auth_info,
371 auth_info->fallback_after_kerberos = b;
374 bool get_cmdline_auth_info_fallback_after_kerberos(const struct user_auth_info *auth_info)
376 return auth_info->fallback_after_kerberos;
379 /* This should only be used by lib/popt_common.c JRA */
380 void set_cmdline_auth_info_use_krb5_ticket(struct user_auth_info *auth_info)
382 auth_info->use_kerberos = true;
383 auth_info->got_pass = true;
386 /* This should only be used by lib/popt_common.c JRA */
387 void set_cmdline_auth_info_smb_encrypt(struct user_auth_info *auth_info)
389 auth_info->smb_encrypt = true;
392 void set_cmdline_auth_info_use_machine_account(struct user_auth_info *auth_info)
394 auth_info->use_machine_account = true;
397 bool get_cmdline_auth_info_got_pass(const struct user_auth_info *auth_info)
399 return auth_info->got_pass;
402 bool get_cmdline_auth_info_smb_encrypt(const struct user_auth_info *auth_info)
404 return auth_info->smb_encrypt;
407 bool get_cmdline_auth_info_use_machine_account(const struct user_auth_info *auth_info)
409 return auth_info->use_machine_account;
412 struct user_auth_info *get_cmdline_auth_info_copy(TALLOC_CTX *mem_ctx,
413 const struct user_auth_info *src)
415 struct user_auth_info *result;
417 result = user_auth_info_init(mem_ctx);
418 if (result == NULL) {
424 result->username = talloc_strdup(
425 result, get_cmdline_auth_info_username(src));
426 result->password = talloc_strdup(
427 result, get_cmdline_auth_info_password(src));
428 if ((result->username == NULL) || (result->password == NULL)) {
436 bool set_cmdline_auth_info_machine_account_creds(struct user_auth_info *auth_info)
439 char *account = NULL;
441 if (!get_cmdline_auth_info_use_machine_account(auth_info)) {
445 if (!secrets_init()) {
446 d_printf("ERROR: Unable to open secrets database\n");
450 if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
454 pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
456 d_printf("ERROR: Unable to fetch machine password for "
458 account, lp_workgroup());
463 set_cmdline_auth_info_username(auth_info, account);
464 set_cmdline_auth_info_password(auth_info, pass);
472 /****************************************************************************
473 Ensure we have a password if one not given.
474 ****************************************************************************/
476 void set_cmdline_auth_info_getpass(struct user_auth_info *auth_info)
482 if (get_cmdline_auth_info_got_pass(auth_info) ||
483 get_cmdline_auth_info_use_kerberos(auth_info)) {
484 /* Already got one... */
488 frame = talloc_stackframe();
489 label = talloc_asprintf(frame, "Enter %s's password: ",
490 get_cmdline_auth_info_username(auth_info));
491 pass = getpass(label);
493 set_cmdline_auth_info_password(auth_info, pass);
498 /****************************************************************************
499 Add a gid to an array of gids if it's not already there.
500 ****************************************************************************/
502 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
503 gid_t **gids, size_t *num_gids)
507 if ((*num_gids != 0) && (*gids == NULL)) {
509 * A former call to this routine has failed to allocate memory
514 for (i=0; i<*num_gids; i++) {
515 if ((*gids)[i] == gid) {
520 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
526 (*gids)[*num_gids] = gid;
531 /*******************************************************************
532 Check if a file exists - call vfs_file_exist for samba files.
533 ********************************************************************/
535 bool file_exist_stat(const char *fname,SMB_STRUCT_STAT *sbuf)
541 if (sys_stat(fname,sbuf) != 0)
544 return((S_ISREG(sbuf->st_ex_mode)) || (S_ISFIFO(sbuf->st_ex_mode)));
547 /*******************************************************************
548 Check if a unix domain socket exists - call vfs_file_exist for samba files.
549 ********************************************************************/
551 bool socket_exist(const char *fname)
554 if (sys_stat(fname,&st) != 0)
557 return S_ISSOCK(st.st_ex_mode);
560 /*******************************************************************
561 Check if a directory exists.
562 ********************************************************************/
564 bool directory_exist_stat(char *dname,SMB_STRUCT_STAT *st)
572 if (sys_stat(dname,st) != 0)
575 ret = S_ISDIR(st->st_ex_mode);
581 /*******************************************************************
582 Returns the size in bytes of the named given the stat struct.
583 ********************************************************************/
585 uint64_t get_file_size_stat(const SMB_STRUCT_STAT *sbuf)
587 return sbuf->st_ex_size;
590 /*******************************************************************
591 Returns the size in bytes of the named file.
592 ********************************************************************/
594 SMB_OFF_T get_file_size(char *file_name)
598 if(sys_stat(file_name,&buf) != 0)
599 return (SMB_OFF_T)-1;
600 return get_file_size_stat(&buf);
603 /*******************************************************************
604 Return a string representing an attribute for a file.
605 ********************************************************************/
607 char *attrib_string(uint16 mode)
613 if (mode & aVOLID) fstrcat(attrstr,"V");
614 if (mode & aDIR) fstrcat(attrstr,"D");
615 if (mode & aARCH) fstrcat(attrstr,"A");
616 if (mode & aHIDDEN) fstrcat(attrstr,"H");
617 if (mode & aSYSTEM) fstrcat(attrstr,"S");
618 if (mode & aRONLY) fstrcat(attrstr,"R");
620 return talloc_strdup(talloc_tos(), attrstr);
623 /*******************************************************************
624 Show a smb message structure.
625 ********************************************************************/
627 void show_msg(char *buf)
635 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
637 (int)CVAL(buf,smb_com),
638 (int)CVAL(buf,smb_rcls),
639 (int)CVAL(buf,smb_reh),
640 (int)SVAL(buf,smb_err),
641 (int)CVAL(buf,smb_flg),
642 (int)SVAL(buf,smb_flg2)));
643 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
644 (int)SVAL(buf,smb_tid),
645 (int)SVAL(buf,smb_pid),
646 (int)SVAL(buf,smb_uid),
647 (int)SVAL(buf,smb_mid)));
648 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
650 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
651 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
652 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
654 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
656 DEBUGADD(5,("smb_bcc=%d\n",bcc));
664 dump_data(10, (uint8 *)smb_buf(buf), bcc);
667 /*******************************************************************
668 Set the length and marker of an encrypted smb packet.
669 ********************************************************************/
671 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
673 _smb_setlen(buf,len);
677 SSVAL(buf,6,enc_ctx_num);
680 /*******************************************************************
681 Set the length and marker of an smb packet.
682 ********************************************************************/
684 void smb_setlen(char *buf,int len)
686 _smb_setlen(buf,len);
694 /*******************************************************************
695 Setup only the byte count for a smb message.
696 ********************************************************************/
698 int set_message_bcc(char *buf,int num_bytes)
700 int num_words = CVAL(buf,smb_wct);
701 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
702 _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
703 return (smb_size + num_words*2 + num_bytes);
706 /*******************************************************************
707 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
708 Return the bytes added
709 ********************************************************************/
711 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
713 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
716 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
717 DEBUG(0, ("talloc failed\n"));
722 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
723 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
727 /*******************************************************************
728 Reduce a file name, removing .. elements.
729 ********************************************************************/
731 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
736 DEBUG(3,("dos_clean_name [%s]\n",s));
738 /* remove any double slashes */
739 str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
744 /* Remove leading .\\ characters */
745 if(strncmp(str, ".\\", 2) == 0) {
746 trim_string(str, ".\\", NULL);
748 str = talloc_strdup(ctx, ".\\");
755 while ((p = strstr_m(str,"\\..\\")) != NULL) {
761 if ((p=strrchr_m(str,'\\')) != NULL) {
766 str = talloc_asprintf(ctx,
775 trim_string(str,NULL,"\\..");
776 return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
779 /*******************************************************************
780 Reduce a file name, removing .. elements.
781 ********************************************************************/
783 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
788 DEBUG(3,("unix_clean_name [%s]\n",s));
790 /* remove any double slashes */
791 str = talloc_all_string_sub(ctx, s, "//","/");
796 /* Remove leading ./ characters */
797 if(strncmp(str, "./", 2) == 0) {
798 trim_string(str, "./", NULL);
800 str = talloc_strdup(ctx, "./");
807 while ((p = strstr_m(str,"/../")) != NULL) {
813 if ((p=strrchr_m(str,'/')) != NULL) {
818 str = talloc_asprintf(ctx,
827 trim_string(str,NULL,"/..");
828 return talloc_all_string_sub(ctx, str, "/./", "/");
831 char *clean_name(TALLOC_CTX *ctx, const char *s)
833 char *str = dos_clean_name(ctx, s);
837 return unix_clean_name(ctx, str);
840 /*******************************************************************
841 Write data into an fd at a given offset. Ignore seek errors.
842 ********************************************************************/
844 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
849 if (pos == (SMB_OFF_T)-1) {
850 return write_data(fd, buffer, N);
852 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
854 ret = sys_pwrite(fd,buffer + total,N - total, pos);
855 if (ret == -1 && errno == ESPIPE) {
856 return write_data(fd, buffer + total,N - total);
859 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
868 return (ssize_t)total;
870 /* Use lseek and write_data. */
871 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
872 if (errno != ESPIPE) {
876 return write_data(fd, buffer, N);
880 /*******************************************************************
881 Sleep for a specified number of milliseconds.
882 ********************************************************************/
884 void smb_msleep(unsigned int t)
886 #if defined(HAVE_NANOSLEEP)
887 struct timespec tval;
890 tval.tv_sec = t/1000;
891 tval.tv_nsec = 1000000*(t%1000);
895 ret = nanosleep(&tval, &tval);
896 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
898 unsigned int tdiff=0;
899 struct timeval tval,t1,t2;
906 tval.tv_sec = (t-tdiff)/1000;
907 tval.tv_usec = 1000*((t-tdiff)%1000);
909 /* Never wait for more than 1 sec. */
910 if (tval.tv_sec > 1) {
917 sys_select_intr(0,&fds,NULL,NULL,&tval);
920 if (t2.tv_sec < t1.tv_sec) {
921 /* Someone adjusted time... */
925 tdiff = TvalDiff(&t1,&t2);
930 NTSTATUS reinit_after_fork(struct messaging_context *msg_ctx,
931 struct event_context *ev_ctx,
932 bool parent_longlived)
934 NTSTATUS status = NT_STATUS_OK;
936 /* Reset the state of the random
937 * number generation system, so
938 * children do not get the same random
939 * numbers as each other */
940 set_need_random_reseed();
942 /* tdb needs special fork handling */
943 if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
944 DEBUG(0,("tdb_reopen_all failed.\n"));
945 status = NT_STATUS_OPEN_FAILED;
950 event_context_reinit(ev_ctx);
955 * For clustering, we need to re-init our ctdbd connection after the
958 status = messaging_reinit(msg_ctx);
959 if (!NT_STATUS_IS_OK(status)) {
960 DEBUG(0,("messaging_reinit() failed: %s\n",
968 /****************************************************************************
969 Put up a yes/no prompt.
970 ****************************************************************************/
972 bool yesno(const char *p)
977 if (!fgets(ans,sizeof(ans)-1,stdin))
980 if (*ans == 'y' || *ans == 'Y')
986 #if defined(PARANOID_MALLOC_CHECKER)
988 /****************************************************************************
989 Internal malloc wrapper. Externally visible.
990 ****************************************************************************/
992 void *malloc_(size_t size)
999 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
1002 /****************************************************************************
1003 Internal calloc wrapper. Not externally visible.
1004 ****************************************************************************/
1006 static void *calloc_(size_t count, size_t size)
1008 if (size == 0 || count == 0) {
1012 return calloc(count, size);
1013 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
1016 /****************************************************************************
1017 Internal realloc wrapper. Not externally visible.
1018 ****************************************************************************/
1020 static void *realloc_(void *ptr, size_t size)
1023 return realloc(ptr, size);
1024 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
1027 #endif /* PARANOID_MALLOC_CHECKER */
1029 /****************************************************************************
1031 ****************************************************************************/
1033 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1035 if (count >= MAX_ALLOC_SIZE/el_size) {
1039 return sys_memalign(align, el_size*count);
1042 /****************************************************************************
1044 ****************************************************************************/
1046 void *calloc_array(size_t size, size_t nmemb)
1048 if (nmemb >= MAX_ALLOC_SIZE/size) {
1051 if (size == 0 || nmemb == 0) {
1054 #if defined(PARANOID_MALLOC_CHECKER)
1055 return calloc_(nmemb, size);
1057 return calloc(nmemb, size);
1061 /****************************************************************************
1062 Expand a pointer to be a particular size.
1063 Note that this version of Realloc has an extra parameter that decides
1064 whether to free the passed in storage on allocation failure or if the
1067 This is designed for use in the typical idiom of :
1069 p = SMB_REALLOC(p, size)
1074 and not to have to keep track of the old 'p' contents to free later, nor
1075 to worry if the size parameter was zero. In the case where NULL is returned
1076 we guarentee that p has been freed.
1078 If free later semantics are desired, then pass 'free_old_on_error' as False which
1079 guarentees that the old contents are not freed on error, even if size == 0. To use
1082 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1090 Changes were instigated by Coverity error checking. JRA.
1091 ****************************************************************************/
1093 void *Realloc(void *p, size_t size, bool free_old_on_error)
1098 if (free_old_on_error) {
1101 DEBUG(2,("Realloc asked for 0 bytes\n"));
1105 #if defined(PARANOID_MALLOC_CHECKER)
1107 ret = (void *)malloc_(size);
1109 ret = (void *)realloc_(p,size);
1113 ret = (void *)malloc(size);
1115 ret = (void *)realloc(p,size);
1120 if (free_old_on_error && p) {
1123 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1129 /****************************************************************************
1130 (Hopefully) efficient array append.
1131 ****************************************************************************/
1133 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1134 void *element, void *_array, uint32 *num_elements,
1135 ssize_t *array_size)
1137 void **array = (void **)_array;
1139 if (*array_size < 0) {
1143 if (*array == NULL) {
1144 if (*array_size == 0) {
1148 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1152 *array = TALLOC(mem_ctx, element_size * (*array_size));
1153 if (*array == NULL) {
1158 if (*num_elements == *array_size) {
1161 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1165 *array = TALLOC_REALLOC(mem_ctx, *array,
1166 element_size * (*array_size));
1168 if (*array == NULL) {
1173 memcpy((char *)(*array) + element_size*(*num_elements),
1174 element, element_size);
1184 /****************************************************************************
1185 Get my own domain name, or "" if we have none.
1186 ****************************************************************************/
1188 char *get_mydnsdomname(TALLOC_CTX *ctx)
1190 const char *domname;
1193 domname = get_mydnsfullname();
1198 p = strchr_m(domname, '.');
1201 return talloc_strdup(ctx, p);
1203 return talloc_strdup(ctx, "");
1207 /****************************************************************************
1208 Interpret a protocol description string, with a default.
1209 ****************************************************************************/
1211 int interpret_protocol(const char *str,int def)
1213 if (strequal(str,"NT1"))
1214 return(PROTOCOL_NT1);
1215 if (strequal(str,"LANMAN2"))
1216 return(PROTOCOL_LANMAN2);
1217 if (strequal(str,"LANMAN1"))
1218 return(PROTOCOL_LANMAN1);
1219 if (strequal(str,"CORE"))
1220 return(PROTOCOL_CORE);
1221 if (strequal(str,"COREPLUS"))
1222 return(PROTOCOL_COREPLUS);
1223 if (strequal(str,"CORE+"))
1224 return(PROTOCOL_COREPLUS);
1226 DEBUG(0,("Unrecognised protocol level %s\n",str));
1232 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1233 /******************************************************************
1234 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1235 Based on a fix from <Thomas.Hepper@icem.de>.
1236 Returns a malloc'ed string.
1237 *******************************************************************/
1239 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1242 const char *p = str;
1243 while(*p && !isspace(*p))
1245 while(*p && isspace(*p))
1248 return talloc_strdup(ctx, p);
1254 /*******************************************************************
1255 Patch from jkf@soton.ac.uk
1256 Split Luke's automount_server into YP lookup and string splitter
1257 so can easily implement automount_path().
1258 Returns a malloc'ed string.
1259 *******************************************************************/
1261 #ifdef WITH_NISPLUS_HOME
1262 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1266 char *nis_map = (char *)lp_nis_home_map_name();
1268 char buffer[NIS_MAXATTRVAL + 1];
1273 snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1274 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1276 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1277 if (result->status != NIS_SUCCESS) {
1278 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1280 object = result->objects.objects_val;
1281 if (object->zo_data.zo_type == ENTRY_OBJ) {
1282 entry = &object->zo_data.objdata_u.en_data;
1283 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1284 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1286 value = talloc_strdup(ctx,
1287 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1289 nis_freeresult(result);
1292 value = talloc_string_sub(ctx,
1299 nis_freeresult(result);
1302 value = strip_mount_options(ctx, value);
1303 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1308 #else /* WITH_NISPLUS_HOME */
1310 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1314 int nis_error; /* returned by yp all functions */
1315 char *nis_result; /* yp_match inits this */
1316 int nis_result_len; /* and set this */
1317 char *nis_domain; /* yp_get_default_domain inits this */
1318 char *nis_map = (char *)lp_nis_home_map_name();
1320 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1321 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1325 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1327 if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1328 strlen(user_name), &nis_result,
1329 &nis_result_len)) == 0) {
1330 value = talloc_strdup(ctx, nis_result);
1334 value = strip_mount_options(ctx, value);
1335 } else if(nis_error == YPERR_KEY) {
1336 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1337 user_name, nis_map));
1338 DEBUG(3, ("using defaults for server and home directory\n"));
1340 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1341 yperr_string(nis_error), user_name, nis_map));
1345 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1349 #endif /* WITH_NISPLUS_HOME */
1352 /****************************************************************************
1353 Check if a process exists. Does this work on all unixes?
1354 ****************************************************************************/
1356 bool process_exists(const struct server_id pid)
1358 if (procid_is_me(&pid)) {
1362 if (procid_is_local(&pid)) {
1363 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1366 #ifdef CLUSTER_SUPPORT
1367 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1374 /*******************************************************************
1375 Convert a uid into a user name.
1376 ********************************************************************/
1378 const char *uidtoname(uid_t uid)
1380 TALLOC_CTX *ctx = talloc_tos();
1382 struct passwd *pass = NULL;
1384 pass = getpwuid_alloc(ctx,uid);
1386 name = talloc_strdup(ctx,pass->pw_name);
1389 name = talloc_asprintf(ctx,
1396 /*******************************************************************
1397 Convert a gid into a group name.
1398 ********************************************************************/
1400 char *gidtoname(gid_t gid)
1404 grp = getgrgid(gid);
1406 return talloc_strdup(talloc_tos(), grp->gr_name);
1409 return talloc_asprintf(talloc_tos(),
1415 /*******************************************************************
1416 Convert a user name into a uid.
1417 ********************************************************************/
1419 uid_t nametouid(const char *name)
1421 struct passwd *pass;
1425 pass = getpwnam_alloc(talloc_autofree_context(), name);
1432 u = (uid_t)strtol(name, &p, 0);
1433 if ((p != name) && (*p == '\0'))
1439 /*******************************************************************
1440 Convert a name to a gid_t if possible. Return -1 if not a group.
1441 ********************************************************************/
1443 gid_t nametogid(const char *name)
1449 g = (gid_t)strtol(name, &p, 0);
1450 if ((p != name) && (*p == '\0'))
1453 grp = sys_getgrnam(name);
1455 return(grp->gr_gid);
1459 /*******************************************************************
1460 Something really nasty happened - panic !
1461 ********************************************************************/
1463 void smb_panic(const char *const why)
1471 if (global_clobber_region_function) {
1472 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1473 global_clobber_region_function,
1474 global_clobber_region_line));
1479 DEBUG(0,("PANIC (pid %llu): %s\n",
1480 (unsigned long long)sys_getpid(), why));
1483 cmd = lp_panic_action();
1485 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1486 result = system(cmd);
1489 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1492 DEBUG(0, ("smb_panic(): action returned status %d\n",
1493 WEXITSTATUS(result)));
1499 /*******************************************************************
1500 Print a backtrace of the stack to the debug log. This function
1501 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1502 exit shortly after calling it.
1503 ********************************************************************/
1505 #ifdef HAVE_LIBUNWIND_H
1506 #include <libunwind.h>
1509 #ifdef HAVE_EXECINFO_H
1510 #include <execinfo.h>
1513 #ifdef HAVE_LIBEXC_H
1517 void log_stack_trace_with_level(int level)
1519 #ifdef HAVE_LIBUNWIND
1520 /* Try to use libunwind before any other technique since on ia64
1521 * libunwind correctly walks the stack in more circumstances than
1524 unw_cursor_t cursor;
1529 unw_word_t ip, sp, off;
1531 procname[sizeof(procname) - 1] = '\0';
1533 if (unw_getcontext(&uc) != 0) {
1534 goto libunwind_failed;
1537 if (unw_init_local(&cursor, &uc) != 0) {
1538 goto libunwind_failed;
1541 DEBUG(level, ("BACKTRACE:\n"));
1545 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1546 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1548 switch (unw_get_proc_name(&cursor,
1549 procname, sizeof(procname) - 1, &off) ) {
1553 /* Name truncated. */
1554 DEBUGADD(level, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1555 i, procname, (long long)off,
1556 (long long)ip, (long long) sp));
1559 /* case -UNW_ENOINFO: */
1560 /* case -UNW_EUNSPEC: */
1561 /* No symbol name found. */
1562 DEBUGADD(level, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1563 i, "<unknown symbol>",
1564 (long long)ip, (long long) sp));
1567 } while (unw_step(&cursor) > 0);
1572 DEBUG(level, ("unable to produce a stack trace with libunwind\n"));
1574 #elif HAVE_BACKTRACE_SYMBOLS
1575 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1576 size_t backtrace_size;
1577 char **backtrace_strings;
1579 /* get the backtrace (stack frames) */
1580 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1581 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1583 DEBUG(level, ("BACKTRACE: %lu stack frames:\n",
1584 (unsigned long)backtrace_size));
1586 if (backtrace_strings) {
1589 for (i = 0; i < backtrace_size; i++)
1590 DEBUGADD(level, (" #%u %s\n", i, backtrace_strings[i]));
1592 /* Leak the backtrace_strings, rather than risk what free() might do */
1597 /* The IRIX libexc library provides an API for unwinding the stack. See
1598 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1599 * since we are about to abort anyway, it hardly matters.
1602 #define NAMESIZE 32 /* Arbitrary */
1604 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1605 char * names[BACKTRACE_STACK_SIZE];
1606 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1613 ZERO_ARRAY(namebuf);
1615 /* We need to be root so we can open our /proc entry to walk
1616 * our stack. It also helps when we want to dump core.
1620 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1621 names[i] = namebuf + (i * NAMESIZE);
1624 levels = trace_back_stack(0, addrs, names,
1625 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1627 DEBUG(level, ("BACKTRACE: %d stack frames:\n", levels));
1628 for (i = 0; i < levels; i++) {
1629 DEBUGADD(level, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1634 DEBUG(level, ("unable to produce a stack trace on this platform\n"));
1638 void log_stack_trace(void)
1640 log_stack_trace_with_level(0);
1643 /*******************************************************************
1644 A readdir wrapper which just returns the file name.
1645 ********************************************************************/
1647 const char *readdirname(SMB_STRUCT_DIR *p)
1649 SMB_STRUCT_DIRENT *ptr;
1655 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1659 dname = ptr->d_name;
1666 #ifdef HAVE_BROKEN_READDIR_NAME
1667 /* using /usr/ucb/cc is BAD */
1671 return talloc_strdup(talloc_tos(), dname);
1674 /*******************************************************************
1675 Utility function used to decide if the last component
1676 of a path matches a (possibly wildcarded) entry in a namelist.
1677 ********************************************************************/
1679 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1681 const char *last_component;
1683 /* if we have no list it's obviously not in the path */
1684 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1688 DEBUG(8, ("is_in_path: %s\n", name));
1690 /* Get the last component of the unix name. */
1691 last_component = strrchr_m(name, '/');
1692 if (!last_component) {
1693 last_component = name;
1695 last_component++; /* Go past '/' */
1698 for(; namelist->name != NULL; namelist++) {
1699 if(namelist->is_wild) {
1700 if (mask_match(last_component, namelist->name, case_sensitive)) {
1701 DEBUG(8,("is_in_path: mask match succeeded\n"));
1705 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1706 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1707 DEBUG(8,("is_in_path: match succeeded\n"));
1712 DEBUG(8,("is_in_path: match not found\n"));
1716 /*******************************************************************
1717 Strip a '/' separated list into an array of
1718 name_compare_enties structures suitable for
1719 passing to is_in_path(). We do this for
1720 speed so we can pre-parse all the names in the list
1721 and don't do it for each call to is_in_path().
1722 namelist is modified here and is assumed to be
1723 a copy owned by the caller.
1724 We also check if the entry contains a wildcard to
1725 remove a potentially expensive call to mask_match
1727 ********************************************************************/
1729 void set_namearray(name_compare_entry **ppname_array, const char *namelist)
1732 const char *nameptr = namelist;
1733 int num_entries = 0;
1736 (*ppname_array) = NULL;
1738 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1741 /* We need to make two passes over the string. The
1742 first to count the number of elements, the second
1747 if ( *nameptr == '/' ) {
1748 /* cope with multiple (useless) /s) */
1752 /* find the next / */
1753 name_end = strchr_m(nameptr, '/');
1755 /* oops - the last check for a / didn't find one. */
1756 if (name_end == NULL)
1759 /* next segment please */
1760 nameptr = name_end + 1;
1764 if(num_entries == 0)
1767 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1768 DEBUG(0,("set_namearray: malloc fail\n"));
1772 /* Now copy out the names */
1776 if ( *nameptr == '/' ) {
1777 /* cope with multiple (useless) /s) */
1781 /* find the next / */
1782 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1785 /* oops - the last check for a / didn't find one. */
1786 if(name_end == NULL)
1789 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1790 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1791 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1795 /* next segment please */
1796 nameptr = name_end + 1;
1800 (*ppname_array)[i].name = NULL;
1805 /****************************************************************************
1806 Routine to free a namearray.
1807 ****************************************************************************/
1809 void free_namearray(name_compare_entry *name_array)
1813 if(name_array == NULL)
1816 for(i=0; name_array[i].name!=NULL; i++)
1817 SAFE_FREE(name_array[i].name);
1818 SAFE_FREE(name_array);
1822 #define DBGC_CLASS DBGC_LOCKING
1824 /****************************************************************************
1825 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
1826 is dealt with in posix.c
1827 Returns True if we have information regarding this lock region (and returns
1828 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
1829 ****************************************************************************/
1831 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
1833 SMB_STRUCT_FLOCK lock;
1836 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
1837 fd,(double)*poffset,(double)*pcount,*ptype));
1839 lock.l_type = *ptype;
1840 lock.l_whence = SEEK_SET;
1841 lock.l_start = *poffset;
1842 lock.l_len = *pcount;
1845 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
1849 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
1850 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
1855 *ptype = lock.l_type;
1856 *poffset = lock.l_start;
1857 *pcount = lock.l_len;
1860 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
1861 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
1866 #define DBGC_CLASS DBGC_ALL
1868 /*******************************************************************
1869 Is the name specified one of my netbios names.
1870 Returns true if it is equal, false otherwise.
1871 ********************************************************************/
1873 bool is_myname(const char *s)
1878 for (n=0; my_netbios_names(n); n++) {
1879 if (strequal(my_netbios_names(n), s)) {
1884 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1888 /*******************************************************************
1889 Is the name specified our workgroup/domain.
1890 Returns true if it is equal, false otherwise.
1891 ********************************************************************/
1893 bool is_myworkgroup(const char *s)
1897 if (strequal(s, lp_workgroup())) {
1901 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1905 /*******************************************************************
1906 we distinguish between 2K and XP by the "Native Lan Manager" string
1907 WinXP => "Windows 2002 5.1"
1908 WinXP 64bit => "Windows XP 5.2"
1909 Win2k => "Windows 2000 5.0"
1910 NT4 => "Windows NT 4.0"
1911 Win9x => "Windows 4.0"
1912 Windows 2003 doesn't set the native lan manager string but
1913 they do set the domain to "Windows 2003 5.2" (probably a bug).
1914 ********************************************************************/
1916 void ra_lanman_string( const char *native_lanman )
1918 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1919 set_remote_arch( RA_WINXP );
1920 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
1921 set_remote_arch( RA_WINXP64 );
1922 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1923 set_remote_arch( RA_WIN2K3 );
1926 static const char *remote_arch_str;
1928 const char *get_remote_arch_str(void)
1930 if (!remote_arch_str) {
1933 return remote_arch_str;
1936 /*******************************************************************
1937 Set the horrid remote_arch string based on an enum.
1938 ********************************************************************/
1940 void set_remote_arch(enum remote_arch_types type)
1945 remote_arch_str = "WfWg";
1948 remote_arch_str = "OS2";
1951 remote_arch_str = "Win95";
1954 remote_arch_str = "WinNT";
1957 remote_arch_str = "Win2K";
1960 remote_arch_str = "WinXP";
1963 remote_arch_str = "WinXP64";
1966 remote_arch_str = "Win2K3";
1969 remote_arch_str = "Vista";
1972 remote_arch_str = "Samba";
1975 remote_arch_str = "CIFSFS";
1978 ra_type = RA_UNKNOWN;
1979 remote_arch_str = "UNKNOWN";
1983 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
1987 /*******************************************************************
1988 Get the remote_arch type.
1989 ********************************************************************/
1991 enum remote_arch_types get_remote_arch(void)
1996 const char *tab_depth(int level, int depth)
1998 if( CHECK_DEBUGLVL(level) ) {
1999 dbgtext("%*s", depth*4, "");
2004 /*****************************************************************************
2005 Provide a checksum on a string
2007 Input: s - the null-terminated character string for which the checksum
2010 Output: The checksum value calculated for s.
2011 *****************************************************************************/
2013 int str_checksum(const char *s)
2021 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2028 /*****************************************************************
2029 Zero a memory area then free it. Used to catch bugs faster.
2030 *****************************************************************/
2032 void zero_free(void *p, size_t size)
2038 /*****************************************************************
2039 Set our open file limit to a requested max and return the limit.
2040 *****************************************************************/
2042 int set_maxfiles(int requested_max)
2044 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2046 int saved_current_limit;
2048 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2049 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2052 return requested_max;
2056 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2057 * account for the extra fd we need
2058 * as well as the log files and standard
2059 * handles etc. Save the limit we want to set in case
2060 * we are running on an OS that doesn't support this limit (AIX)
2061 * which always returns RLIM_INFINITY for rlp.rlim_max.
2064 /* Try raising the hard (max) limit to the requested amount. */
2066 #if defined(RLIM_INFINITY)
2067 if (rlp.rlim_max != RLIM_INFINITY) {
2068 int orig_max = rlp.rlim_max;
2070 if ( rlp.rlim_max < requested_max )
2071 rlp.rlim_max = requested_max;
2073 /* This failing is not an error - many systems (Linux) don't
2074 support our default request of 10,000 open files. JRA. */
2076 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2077 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2078 (int)rlp.rlim_max, strerror(errno) ));
2080 /* Set failed - restore original value from get. */
2081 rlp.rlim_max = orig_max;
2086 /* Now try setting the soft (current) limit. */
2088 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2090 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2091 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2092 (int)rlp.rlim_cur, strerror(errno) ));
2094 return saved_current_limit;
2097 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2098 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2101 return saved_current_limit;
2104 #if defined(RLIM_INFINITY)
2105 if(rlp.rlim_cur == RLIM_INFINITY)
2106 return saved_current_limit;
2109 if((int)rlp.rlim_cur > saved_current_limit)
2110 return saved_current_limit;
2112 return rlp.rlim_cur;
2113 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2115 * No way to know - just guess...
2117 return requested_max;
2121 /*****************************************************************
2122 Possibly replace mkstemp if it is broken.
2123 *****************************************************************/
2125 int smb_mkstemp(char *name_template)
2127 #if HAVE_SECURE_MKSTEMP
2128 return mkstemp(name_template);
2130 /* have a reasonable go at emulating it. Hope that
2131 the system mktemp() isn't completly hopeless */
2132 char *p = mktemp(name_template);
2135 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2139 /*****************************************************************
2140 malloc that aborts with smb_panic on fail or zero size.
2141 *****************************************************************/
2143 void *smb_xmalloc_array(size_t size, unsigned int count)
2147 smb_panic("smb_xmalloc_array: called with zero size");
2149 if (count >= MAX_ALLOC_SIZE/size) {
2150 smb_panic("smb_xmalloc_array: alloc size too large");
2152 if ((p = SMB_MALLOC(size*count)) == NULL) {
2153 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2154 (unsigned long)size, (unsigned long)count));
2155 smb_panic("smb_xmalloc_array: malloc failed");
2161 vasprintf that aborts on malloc fail
2164 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2171 n = vasprintf(ptr, format, ap2);
2172 if (n == -1 || ! *ptr) {
2173 smb_panic("smb_xvasprintf: out of memory");
2179 /*****************************************************************
2180 Get local hostname and cache result.
2181 *****************************************************************/
2183 char *myhostname(void)
2187 /* This is cached forever so
2188 * use talloc_autofree_context() ctx. */
2189 ret = get_myname(talloc_autofree_context());
2195 * @brief Returns an absolute path to a file concatenating the provided
2196 * @a rootpath and @a basename
2198 * @param name Filename, relative to @a rootpath
2200 * @retval Pointer to a string containing the full path.
2203 static char *xx_path(const char *name, const char *rootpath)
2207 fname = talloc_strdup(talloc_tos(), rootpath);
2211 trim_string(fname,"","/");
2213 if (!directory_exist(fname)) {
2214 if (!mkdir(fname,0755))
2215 DEBUG(1, ("Unable to create directory %s for file %s. "
2216 "Error was %s\n", fname, name, strerror(errno)));
2219 return talloc_asprintf(talloc_tos(),
2226 * @brief Returns an absolute path to a file in the Samba lock directory.
2228 * @param name File to find, relative to LOCKDIR.
2230 * @retval Pointer to a talloc'ed string containing the full path.
2233 char *lock_path(const char *name)
2235 return xx_path(name, lp_lockdir());
2239 * @brief Returns an absolute path to a file in the Samba pid directory.
2241 * @param name File to find, relative to PIDDIR.
2243 * @retval Pointer to a talloc'ed string containing the full path.
2246 char *pid_path(const char *name)
2248 return xx_path(name, lp_piddir());
2252 * @brief Returns an absolute path to a file in the Samba lib directory.
2254 * @param name File to find, relative to LIBDIR.
2256 * @retval Pointer to a string containing the full path.
2259 char *lib_path(const char *name)
2261 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2265 * @brief Returns an absolute path to a file in the Samba modules directory.
2267 * @param name File to find, relative to MODULESDIR.
2269 * @retval Pointer to a string containing the full path.
2272 char *modules_path(const char *name)
2274 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_MODULESDIR(), name);
2278 * @brief Returns an absolute path to a file in the Samba data directory.
2280 * @param name File to find, relative to CODEPAGEDIR.
2282 * @retval Pointer to a talloc'ed string containing the full path.
2285 char *data_path(const char *name)
2287 return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2291 * @brief Returns an absolute path to a file in the Samba state directory.
2293 * @param name File to find, relative to STATEDIR.
2295 * @retval Pointer to a talloc'ed string containing the full path.
2298 char *state_path(const char *name)
2300 return xx_path(name, lp_statedir());
2304 * @brief Returns an absolute path to a file in the Samba cache directory.
2306 * @param name File to find, relative to CACHEDIR.
2308 * @retval Pointer to a talloc'ed string containing the full path.
2311 char *cache_path(const char *name)
2313 return xx_path(name, lp_cachedir());
2317 * @brief Returns the platform specific shared library extension.
2319 * @retval Pointer to a const char * containing the extension.
2322 const char *shlib_ext(void)
2324 return get_dyn_SHLIBEXT();
2327 /*******************************************************************
2328 Given a filename - get its directory name
2329 ********************************************************************/
2331 bool parent_dirname(TALLOC_CTX *mem_ctx, const char *dir, char **parent,
2337 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2340 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2351 if (!(*parent = (char *)TALLOC_MEMDUP(mem_ctx, dir, len+1))) {
2354 (*parent)[len] = '\0';
2362 /*******************************************************************
2363 Determine if a pattern contains any Microsoft wildcard characters.
2364 *******************************************************************/
2366 bool ms_has_wild(const char *s)
2370 if (lp_posix_pathnames()) {
2371 /* With posix pathnames no characters are wild. */
2375 while ((c = *s++)) {
2388 bool ms_has_wild_w(const smb_ucs2_t *s)
2391 if (!s) return False;
2392 while ((c = *s++)) {
2394 case UCS2_CHAR('*'):
2395 case UCS2_CHAR('?'):
2396 case UCS2_CHAR('<'):
2397 case UCS2_CHAR('>'):
2398 case UCS2_CHAR('"'):
2405 /*******************************************************************
2406 A wrapper that handles case sensitivity and the special handling
2408 *******************************************************************/
2410 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2412 if (strcmp(string,"..") == 0)
2414 if (strcmp(pattern,".") == 0)
2417 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2420 /*******************************************************************
2421 A wrapper that handles case sensitivity and the special handling
2422 of the ".." name. Varient that is only called by old search code which requires
2423 pattern translation.
2424 *******************************************************************/
2426 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2428 if (strcmp(string,"..") == 0)
2430 if (strcmp(pattern,".") == 0)
2433 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2436 /*******************************************************************
2437 A wrapper that handles a list of patters and calls mask_match()
2438 on each. Returns True if any of the patterns match.
2439 *******************************************************************/
2441 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2443 while (listLen-- > 0) {
2444 if (mask_match(string, *list++, is_case_sensitive))
2450 /*********************************************************
2451 Recursive routine that is called by unix_wild_match.
2452 *********************************************************/
2454 static bool unix_do_match(const char *regexp, const char *str)
2458 for( p = regexp; *p && *str; ) {
2469 * Look for a character matching
2470 * the one after the '*'.
2474 return true; /* Automatic match */
2477 while(*str && (*p != *str))
2481 * Patch from weidel@multichart.de. In the case of the regexp
2482 * '*XX*' we want to ensure there are at least 2 'X' characters
2483 * in the string after the '*' for a match to be made.
2490 * Eat all the characters that match, but count how many there were.
2493 while(*str && (*p == *str)) {
2499 * Now check that if the regexp had n identical characters that
2500 * matchcount had at least that many matches.
2503 while ( *(p+1) && (*(p+1) == *p)) {
2508 if ( matchcount <= 0 )
2512 str--; /* We've eaten the match char after the '*' */
2514 if(unix_do_match(p, str))
2536 if (!*p && str[0] == '.' && str[1] == 0)
2539 if (!*str && *p == '?') {
2545 if(!*str && (*p == '*' && p[1] == '\0'))
2551 /*******************************************************************
2552 Simple case insensitive interface to a UNIX wildcard matcher.
2553 Returns True if match, False if not.
2554 *******************************************************************/
2556 bool unix_wild_match(const char *pattern, const char *string)
2558 TALLOC_CTX *ctx = talloc_stackframe();
2564 p2 = talloc_strdup(ctx,pattern);
2565 s2 = talloc_strdup(ctx,string);
2573 /* Remove any *? and ** from the pattern as they are meaningless */
2574 for(p = p2; *p; p++) {
2575 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2576 memmove(&p[1], &p[2], strlen(&p[2])+1);
2580 if (strequal(p2,"*")) {
2585 ret = unix_do_match(p2, s2);
2590 /**********************************************************************
2591 Converts a name to a fully qualified domain name.
2592 Returns true if lookup succeeded, false if not (then fqdn is set to name)
2593 Note we deliberately use gethostbyname here, not getaddrinfo as we want
2594 to examine the h_aliases and I don't know how to do that with getaddrinfo.
2595 ***********************************************************************/
2597 bool name_to_fqdn(fstring fqdn, const char *name)
2600 struct hostent *hp = gethostbyname(name);
2602 if (!hp || !hp->h_name || !*hp->h_name) {
2603 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2604 fstrcpy(fqdn, name);
2608 /* Find out if the fqdn is returned as an alias
2609 * to cope with /etc/hosts files where the first
2610 * name is not the fqdn but the short name */
2611 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2613 for (i = 0; hp->h_aliases[i]; i++) {
2614 if (strchr_m(hp->h_aliases[i], '.')) {
2615 full = hp->h_aliases[i];
2620 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2621 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2622 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2623 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2624 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2631 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2632 fstrcpy(fqdn, full);
2636 /**********************************************************************
2637 Append a DATA_BLOB to a talloc'ed object
2638 ***********************************************************************/
2640 void *talloc_append_blob(TALLOC_CTX *mem_ctx, void *buf, DATA_BLOB blob)
2642 size_t old_size = 0;
2645 if (blob.length == 0) {
2650 old_size = talloc_get_size(buf);
2653 result = (char *)TALLOC_REALLOC(mem_ctx, buf, old_size + blob.length);
2654 if (result == NULL) {
2658 memcpy(result + old_size, blob.data, blob.length);
2662 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2664 switch (share_access & ~FILE_SHARE_DELETE) {
2665 case FILE_SHARE_NONE:
2667 case FILE_SHARE_READ:
2669 case FILE_SHARE_WRITE:
2671 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2674 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2676 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2683 pid_t procid_to_pid(const struct server_id *proc)
2688 static uint32 my_vnn = NONCLUSTER_VNN;
2690 void set_my_vnn(uint32 vnn)
2692 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
2696 uint32 get_my_vnn(void)
2701 static uint64_t my_unique_id = 0;
2703 void set_my_unique_id(uint64_t unique_id)
2705 my_unique_id = unique_id;
2708 struct server_id pid_to_procid(pid_t pid)
2710 struct server_id result;
2712 result.unique_id = my_unique_id;
2713 #ifdef CLUSTER_SUPPORT
2714 result.vnn = my_vnn;
2719 struct server_id procid_self(void)
2721 return pid_to_procid(sys_getpid());
2724 struct server_id server_id_self(void)
2726 return procid_self();
2729 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
2731 if (p1->pid != p2->pid)
2733 #ifdef CLUSTER_SUPPORT
2734 if (p1->vnn != p2->vnn)
2740 bool cluster_id_equal(const struct server_id *id1,
2741 const struct server_id *id2)
2743 return procid_equal(id1, id2);
2746 bool procid_is_me(const struct server_id *pid)
2748 if (pid->pid != sys_getpid())
2750 #ifdef CLUSTER_SUPPORT
2751 if (pid->vnn != my_vnn)
2757 struct server_id interpret_pid(const char *pid_string)
2759 struct server_id result;
2761 #ifdef CLUSTER_SUPPORT
2763 if (sscanf(pid_string, "%u:%d", &vnn, &pid) == 2) {
2767 else if (sscanf(pid_string, "%d", &pid) == 1) {
2768 result.vnn = get_my_vnn();
2772 result.vnn = NONCLUSTER_VNN;
2776 if (sscanf(pid_string, "%d", &pid) != 1) {
2782 /* Assigning to result.pid may have overflowed
2783 Map negative pid to -1: i.e. error */
2784 if (result.pid < 0) {
2787 result.unique_id = 0;
2791 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
2793 #ifdef CLUSTER_SUPPORT
2794 if (pid->vnn == NONCLUSTER_VNN) {
2795 return talloc_asprintf(mem_ctx,
2800 return talloc_asprintf(mem_ctx,
2806 return talloc_asprintf(mem_ctx,
2812 char *procid_str_static(const struct server_id *pid)
2814 return procid_str(talloc_tos(), pid);
2817 bool procid_valid(const struct server_id *pid)
2819 return (pid->pid != -1);
2822 bool procid_is_local(const struct server_id *pid)
2824 #ifdef CLUSTER_SUPPORT
2825 return pid->vnn == my_vnn;
2831 int this_is_smp(void)
2833 #if defined(HAVE_SYSCONF)
2835 #if defined(SYSCONF_SC_NPROC_ONLN)
2836 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
2837 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
2838 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
2848 /****************************************************************
2849 Check if offset/length fit into bufsize. Should probably be
2850 merged with is_offset_safe, but this would require a rewrite
2851 of lanman.c. Later :-)
2852 ****************************************************************/
2854 bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
2856 if ((offset + length < offset) || (offset + length < length)) {
2860 if ((offset > bufsize) || (offset + length > bufsize)) {
2867 /****************************************************************
2868 Check if an offset into a buffer is safe.
2869 If this returns True it's safe to indirect into the byte at
2871 ****************************************************************/
2873 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2875 const char *end_base = buf_base + buf_len;
2876 char *end_ptr = ptr + off;
2878 if (!buf_base || !ptr) {
2882 if (end_base < buf_base || end_ptr < ptr) {
2883 return False; /* wrap. */
2886 if (end_ptr < end_base) {
2892 /****************************************************************
2893 Return a safe pointer into a buffer, or NULL.
2894 ****************************************************************/
2896 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2898 return is_offset_safe(buf_base, buf_len, ptr, off) ?
2902 /****************************************************************
2903 Return a safe pointer into a string within a buffer, or NULL.
2904 ****************************************************************/
2906 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
2908 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
2911 /* Check if a valid string exists at this offset. */
2912 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
2918 /****************************************************************
2919 Return an SVAL at a pointer, or failval if beyond the end.
2920 ****************************************************************/
2922 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2925 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
2928 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
2931 return SVAL(ptr,off);
2934 /****************************************************************
2935 Return an IVAL at a pointer, or failval if beyond the end.
2936 ****************************************************************/
2938 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
2941 * Note we use off+3 here, not off+4 as IVAL accesses
2942 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
2944 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
2947 return IVAL(ptr,off);
2950 /****************************************************************
2951 Split DOM\user into DOM and user. Do not mix with winbind variants of that
2952 call (they take care of winbind separator and other winbind specific settings).
2953 ****************************************************************/
2955 void split_domain_user(TALLOC_CTX *mem_ctx,
2956 const char *full_name,
2960 const char *p = NULL;
2962 p = strchr_m(full_name, '\\');
2965 *domain = talloc_strndup(mem_ctx, full_name,
2966 PTR_DIFF(p, full_name));
2967 *user = talloc_strdup(mem_ctx, p+1);
2969 *domain = talloc_strdup(mem_ctx, "");
2970 *user = talloc_strdup(mem_ctx, full_name);
2976 Disable these now we have checked all code paths and ensured
2977 NULL returns on zero request. JRA.
2979 /****************************************************************
2980 talloc wrapper functions that guarentee a null pointer return
2982 ****************************************************************/
2984 #ifndef MAX_TALLOC_SIZE
2985 #define MAX_TALLOC_SIZE 0x10000000
2989 * talloc and zero memory.
2990 * - returns NULL if size is zero.
2993 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3001 p = talloc_named_const(ctx, size, name);
3004 memset(p, '\0', size);
3011 * memdup with a talloc.
3012 * - returns NULL if size is zero.
3015 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3023 newp = talloc_named_const(t, size, name);
3025 memcpy(newp, p, size);
3032 * alloc an array, checking for integer overflow in the array size.
3033 * - returns NULL if count or el_size are zero.
3036 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3038 if (count >= MAX_TALLOC_SIZE/el_size) {
3042 if (el_size == 0 || count == 0) {
3046 return talloc_named_const(ctx, el_size * count, name);
3050 * alloc an zero array, checking for integer overflow in the array size
3051 * - returns NULL if count or el_size are zero.
3054 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3056 if (count >= MAX_TALLOC_SIZE/el_size) {
3060 if (el_size == 0 || count == 0) {
3064 return _talloc_zero(ctx, el_size * count, name);
3068 * Talloc wrapper that returns NULL if size == 0.
3070 void *talloc_zeronull(const void *context, size_t size, const char *name)
3075 return talloc_named_const(context, size, name);
3079 /* Split a path name into filename and stream name components. Canonicalise
3080 * such that an implicit $DATA token is always explicit.
3082 * The "specification" of this function can be found in the
3083 * run_local_stream_name() function in torture.c, I've tried those
3084 * combinations against a W2k3 server.
3087 NTSTATUS split_ntfs_stream_name(TALLOC_CTX *mem_ctx, const char *fname,
3088 char **pbase, char **pstream)
3091 char *stream = NULL;
3092 char *sname; /* stream name */
3093 const char *stype; /* stream type */
3095 DEBUG(10, ("split_ntfs_stream_name called for [%s]\n", fname));
3097 sname = strchr_m(fname, ':');
3099 if (lp_posix_pathnames() || (sname == NULL)) {
3100 if (pbase != NULL) {
3101 base = talloc_strdup(mem_ctx, fname);
3102 NT_STATUS_HAVE_NO_MEMORY(base);
3107 if (pbase != NULL) {
3108 base = talloc_strndup(mem_ctx, fname, PTR_DIFF(sname, fname));
3109 NT_STATUS_HAVE_NO_MEMORY(base);
3114 stype = strchr_m(sname, ':');
3116 if (stype == NULL) {
3117 sname = talloc_strdup(mem_ctx, sname);
3121 if (StrCaseCmp(stype, ":$DATA") != 0) {
3123 * If there is an explicit stream type, so far we only
3124 * allow $DATA. Is there anything else allowed? -- vl
3126 DEBUG(10, ("[%s] is an invalid stream type\n", stype));
3128 return NT_STATUS_OBJECT_NAME_INVALID;
3130 sname = talloc_strndup(mem_ctx, sname, PTR_DIFF(stype, sname));
3134 if (sname == NULL) {
3136 return NT_STATUS_NO_MEMORY;
3139 if (sname[0] == '\0') {
3141 * no stream name, so no stream
3146 if (pstream != NULL) {
3147 stream = talloc_asprintf(mem_ctx, "%s:%s", sname, stype);
3148 if (stream == NULL) {
3151 return NT_STATUS_NO_MEMORY;
3154 * upper-case the type field
3156 strupper_m(strchr_m(stream, ':')+1);
3160 if (pbase != NULL) {
3163 if (pstream != NULL) {
3166 return NT_STATUS_OK;
3169 bool is_valid_policy_hnd(const struct policy_handle *hnd)
3171 struct policy_handle tmp;
3173 return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
3176 bool policy_hnd_equal(const struct policy_handle *hnd1,
3177 const struct policy_handle *hnd2)
3179 if (!hnd1 || !hnd2) {
3183 return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
3186 /****************************************************************
3187 strip off leading '\\' from a hostname
3188 ****************************************************************/
3190 const char *strip_hostname(const char *s)
3196 if (strlen_m(s) < 3) {
3200 if (s[0] == '\\') s++;
3201 if (s[0] == '\\') s++;