2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2002
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 fstring local_machine;
27 extern char *global_clobber_region_function;
28 extern unsigned int global_clobber_region_line;
29 extern fstring remote_arch;
31 /* Max allowable allococation - 256mb - 0x10000000 */
32 #define MAX_ALLOC_SIZE (1024*1024*256)
34 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
35 #ifdef WITH_NISPLUS_HOME
36 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
38 * The following lines are needed due to buggy include files
39 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
40 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
41 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
42 * an enum in /usr/include/rpcsvc/nis.h.
49 #if defined(GROUP_OBJ)
53 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
55 #include <rpcsvc/nis.h>
57 #endif /* WITH_NISPLUS_HOME */
58 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
60 enum protocol_types Protocol = PROTOCOL_COREPLUS;
62 /* a default finfo structure to ensure all fields are sensible */
65 /* this is used by the chaining code */
70 static enum remote_arch_types ra_type = RA_UNKNOWN;
71 pstring user_socket_options=DEFAULT_SOCKET_OPTIONS;
73 /***********************************************************************
74 Definitions for all names.
75 ***********************************************************************/
77 static char *smb_myname;
78 static char *smb_myworkgroup;
79 static char *smb_scope;
80 static int smb_num_netbios_names;
81 static char **smb_my_netbios_names;
83 /***********************************************************************
84 Allocate and set myname. Ensure upper case.
85 ***********************************************************************/
87 BOOL set_global_myname(const char *myname)
89 SAFE_FREE(smb_myname);
90 smb_myname = SMB_STRDUP(myname);
93 strupper_m(smb_myname);
97 const char *global_myname(void)
102 /***********************************************************************
103 Allocate and set myworkgroup. Ensure upper case.
104 ***********************************************************************/
106 BOOL set_global_myworkgroup(const char *myworkgroup)
108 SAFE_FREE(smb_myworkgroup);
109 smb_myworkgroup = SMB_STRDUP(myworkgroup);
110 if (!smb_myworkgroup)
112 strupper_m(smb_myworkgroup);
116 const char *lp_workgroup(void)
118 return smb_myworkgroup;
121 /***********************************************************************
122 Allocate and set scope. Ensure upper case.
123 ***********************************************************************/
125 BOOL set_global_scope(const char *scope)
127 SAFE_FREE(smb_scope);
128 smb_scope = SMB_STRDUP(scope);
131 strupper_m(smb_scope);
135 /*********************************************************************
136 Ensure scope is never null string.
137 *********************************************************************/
139 const char *global_scope(void)
142 set_global_scope("");
146 static void free_netbios_names_array(void)
150 for (i = 0; i < smb_num_netbios_names; i++)
151 SAFE_FREE(smb_my_netbios_names[i]);
153 SAFE_FREE(smb_my_netbios_names);
154 smb_num_netbios_names = 0;
157 static BOOL allocate_my_netbios_names_array(size_t number)
159 free_netbios_names_array();
161 smb_num_netbios_names = number + 1;
162 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
164 if (!smb_my_netbios_names)
167 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
171 static BOOL set_my_netbios_names(const char *name, int i)
173 SAFE_FREE(smb_my_netbios_names[i]);
175 smb_my_netbios_names[i] = SMB_STRDUP(name);
176 if (!smb_my_netbios_names[i])
178 strupper_m(smb_my_netbios_names[i]);
182 /***********************************************************************
183 Free memory allocated to global objects
184 ***********************************************************************/
186 void gfree_names(void)
188 SAFE_FREE( smb_myname );
189 SAFE_FREE( smb_myworkgroup );
190 SAFE_FREE( smb_scope );
191 free_netbios_names_array();
194 void gfree_all( void )
203 /* release the talloc null_context memory last */
204 talloc_disable_null_tracking();
207 const char *my_netbios_names(int i)
209 return smb_my_netbios_names[i];
212 BOOL set_netbios_aliases(const char **str_array)
216 /* Work out the max number of netbios aliases that we have */
217 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
220 if ( global_myname() && *global_myname())
223 /* Allocate space for the netbios aliases */
224 if (!allocate_my_netbios_names_array(namecount))
227 /* Use the global_myname string first */
229 if ( global_myname() && *global_myname()) {
230 set_my_netbios_names( global_myname(), namecount );
236 for ( i = 0; str_array[i] != NULL; i++) {
238 BOOL duplicate = False;
240 /* Look for duplicates */
241 for( n=0; n<namecount; n++ ) {
242 if( strequal( str_array[i], my_netbios_names(n) ) ) {
248 if (!set_my_netbios_names(str_array[i], namecount))
257 /****************************************************************************
258 Common name initialization code.
259 ****************************************************************************/
261 BOOL init_names(void)
266 if (global_myname() == NULL || *global_myname() == '\0') {
267 if (!set_global_myname(myhostname())) {
268 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
273 if (!set_netbios_aliases(lp_netbios_aliases())) {
274 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
278 fstrcpy( local_machine, global_myname() );
279 trim_char( local_machine, ' ', ' ' );
280 p = strchr( local_machine, ' ' );
283 strlower_m( local_machine );
285 DEBUG( 5, ("Netbios name list:-\n") );
286 for( n=0; my_netbios_names(n); n++ )
287 DEBUGADD( 5, ( "my_netbios_names[%d]=\"%s\"\n", n, my_netbios_names(n) ) );
292 /**************************************************************************n
293 Find a suitable temporary directory. The result should be copied immediately
294 as it may be overwritten by a subsequent call.
295 ****************************************************************************/
297 const char *tmpdir(void)
300 if ((p = getenv("TMPDIR")))
305 /****************************************************************************
306 Add a gid to an array of gids if it's not already there.
307 ****************************************************************************/
309 BOOL add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
310 gid_t **gids, size_t *num_gids)
314 if ((*num_gids != 0) && (*gids == NULL)) {
316 * A former call to this routine has failed to allocate memory
321 for (i=0; i<*num_gids; i++) {
322 if ((*gids)[i] == gid) {
327 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
333 (*gids)[*num_gids] = gid;
338 /****************************************************************************
339 Like atoi but gets the value up to the separator character.
340 ****************************************************************************/
342 static const char *Atoic(const char *p, int *n, const char *c)
344 if (!isdigit((int)*p)) {
345 DEBUG(5, ("Atoic: malformed number\n"));
351 while ((*p) && isdigit((int)*p))
354 if (strchr_m(c, *p) == NULL) {
355 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
362 /*************************************************************************
363 Reads a list of numbers.
364 *************************************************************************/
366 const char *get_numlist(const char *p, uint32 **num, int *count)
370 if (num == NULL || count == NULL)
376 while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
377 *num = SMB_REALLOC_ARRAY((*num), uint32, (*count)+1);
381 (*num)[(*count)] = val;
389 /*******************************************************************
390 Check if a file exists - call vfs_file_exist for samba files.
391 ********************************************************************/
393 BOOL file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
399 if (sys_stat(fname,sbuf) != 0)
402 return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
405 /*******************************************************************
406 Check a files mod time.
407 ********************************************************************/
409 time_t file_modtime(const char *fname)
413 if (sys_stat(fname,&st) != 0)
419 /*******************************************************************
420 Check if a directory exists.
421 ********************************************************************/
423 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
431 if (sys_stat(dname,st) != 0)
434 ret = S_ISDIR(st->st_mode);
440 /*******************************************************************
441 Returns the size in bytes of the named file.
442 ********************************************************************/
444 SMB_OFF_T get_file_size(char *file_name)
448 if(sys_stat(file_name,&buf) != 0)
449 return (SMB_OFF_T)-1;
453 /*******************************************************************
454 Return a string representing an attribute for a file.
455 ********************************************************************/
457 char *attrib_string(uint16 mode)
463 if (mode & aVOLID) fstrcat(attrstr,"V");
464 if (mode & aDIR) fstrcat(attrstr,"D");
465 if (mode & aARCH) fstrcat(attrstr,"A");
466 if (mode & aHIDDEN) fstrcat(attrstr,"H");
467 if (mode & aSYSTEM) fstrcat(attrstr,"S");
468 if (mode & aRONLY) fstrcat(attrstr,"R");
470 return talloc_strdup(talloc_tos(), attrstr);
473 /*******************************************************************
474 Show a smb message structure.
475 ********************************************************************/
477 void show_msg(char *buf)
485 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
487 (int)CVAL(buf,smb_com),
488 (int)CVAL(buf,smb_rcls),
489 (int)CVAL(buf,smb_reh),
490 (int)SVAL(buf,smb_err),
491 (int)CVAL(buf,smb_flg),
492 (int)SVAL(buf,smb_flg2)));
493 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
494 (int)SVAL(buf,smb_tid),
495 (int)SVAL(buf,smb_pid),
496 (int)SVAL(buf,smb_uid),
497 (int)SVAL(buf,smb_mid)));
498 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
500 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
501 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
502 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
504 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
506 DEBUGADD(5,("smb_bcc=%d\n",bcc));
514 dump_data(10, (uint8 *)smb_buf(buf), bcc);
517 /*******************************************************************
518 Set the length and marker of an smb packet.
519 ********************************************************************/
521 void smb_setlen(char *buf,int len)
523 _smb_setlen(buf,len);
531 /*******************************************************************
532 Setup the word count and byte count for a smb message.
533 ********************************************************************/
535 int set_message(char *buf,int num_words,int num_bytes,BOOL zero)
537 if (zero && (num_words || num_bytes)) {
538 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
540 SCVAL(buf,smb_wct,num_words);
541 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
542 smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
543 return (smb_size + num_words*2 + num_bytes);
546 /*******************************************************************
547 Setup only the byte count for a smb message.
548 ********************************************************************/
550 int set_message_bcc(char *buf,int num_bytes)
552 int num_words = CVAL(buf,smb_wct);
553 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
554 smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
555 return (smb_size + num_words*2 + num_bytes);
558 /*******************************************************************
559 Setup only the byte count for a smb message, using the end of the
561 ********************************************************************/
563 int set_message_end(void *outbuf,void *end_ptr)
565 return set_message_bcc((char *)outbuf,PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
568 /*******************************************************************
569 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
570 Return the bytes added
571 ********************************************************************/
573 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
575 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
578 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
579 DEBUG(0, ("talloc failed\n"));
584 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
585 set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
589 /*******************************************************************
590 Reduce a file name, removing .. elements.
591 ********************************************************************/
593 void dos_clean_name(char *s)
597 DEBUG(3,("dos_clean_name [%s]\n",s));
599 /* remove any double slashes */
600 all_string_sub(s, "\\\\", "\\", 0);
602 /* Remove leading .\\ characters */
603 if(strncmp(s, ".\\", 2) == 0) {
604 trim_string(s, ".\\", NULL);
609 while ((p = strstr_m(s,"\\..\\")) != NULL) {
615 if ((p=strrchr_m(s,'\\')) != NULL)
622 trim_string(s,NULL,"\\..");
623 all_string_sub(s, "\\.\\", "\\", 0);
626 /*******************************************************************
627 Reduce a file name, removing .. elements.
628 ********************************************************************/
630 void unix_clean_name(char *s)
634 DEBUG(3,("unix_clean_name [%s]\n",s));
636 /* remove any double slashes */
637 all_string_sub(s, "//","/", 0);
639 /* Remove leading ./ characters */
640 if(strncmp(s, "./", 2) == 0) {
641 trim_string(s, "./", NULL);
646 while ((p = strstr_m(s,"/../")) != NULL) {
652 if ((p=strrchr_m(s,'/')) != NULL)
659 trim_string(s,NULL,"/..");
660 all_string_sub(s, "/./", "/", 0);
663 void clean_name(char *s)
669 /*******************************************************************
670 Close the low 3 fd's and open dev/null in their place.
671 ********************************************************************/
673 void close_low_fds(BOOL stderr_too)
685 /* try and use up these file descriptors, so silly
686 library routines writing to stdout etc won't cause havoc */
688 if (i == 2 && !stderr_too)
691 fd = sys_open("/dev/null",O_RDWR,0);
693 fd = sys_open("/dev/null",O_WRONLY,0);
695 DEBUG(0,("Can't open /dev/null\n"));
699 DEBUG(0,("Didn't get file descriptor %d\n",i));
706 /*******************************************************************
707 Write data into an fd at a given offset. Ignore seek errors.
708 ********************************************************************/
710 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
715 if (pos == (SMB_OFF_T)-1) {
716 return write_data(fd, buffer, N);
718 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
720 ret = sys_pwrite(fd,buffer + total,N - total, pos);
721 if (ret == -1 && errno == ESPIPE) {
722 return write_data(fd, buffer + total,N - total);
725 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
734 return (ssize_t)total;
736 /* Use lseek and write_data. */
737 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
738 if (errno != ESPIPE) {
742 return write_data(fd, buffer, N);
746 /****************************************************************************
747 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
751 ****************************************************************************/
753 int set_blocking(int fd, BOOL set)
757 #define FLAG_TO_SET O_NONBLOCK
760 #define FLAG_TO_SET O_NDELAY
762 #define FLAG_TO_SET FNDELAY
766 if((val = sys_fcntl_long(fd, F_GETFL, 0)) == -1)
768 if(set) /* Turn blocking on - ie. clear nonblock flag */
772 return sys_fcntl_long( fd, F_SETFL, val);
776 /****************************************************************************
777 Transfer some data between two fd's.
778 ****************************************************************************/
780 #ifndef TRANSFER_BUF_SIZE
781 #define TRANSFER_BUF_SIZE 65536
784 ssize_t transfer_file_internal(int infd, int outfd, size_t n, ssize_t (*read_fn)(int, void *, size_t),
785 ssize_t (*write_fn)(int, const void *, size_t))
791 size_t num_to_read_thistime;
792 size_t num_written = 0;
794 if ((buf = SMB_MALLOC_ARRAY(char, TRANSFER_BUF_SIZE)) == NULL)
798 num_to_read_thistime = MIN((n - total), TRANSFER_BUF_SIZE);
800 read_ret = (*read_fn)(infd, buf, num_to_read_thistime);
801 if (read_ret == -1) {
802 DEBUG(0,("transfer_file_internal: read failure. Error = %s\n", strerror(errno) ));
811 while (num_written < read_ret) {
812 write_ret = (*write_fn)(outfd,buf + num_written, read_ret - num_written);
814 if (write_ret == -1) {
815 DEBUG(0,("transfer_file_internal: write failure. Error = %s\n", strerror(errno) ));
820 return (ssize_t)total;
822 num_written += (size_t)write_ret;
825 total += (size_t)read_ret;
829 return (ssize_t)total;
832 SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n)
834 return (SMB_OFF_T)transfer_file_internal(infd, outfd, (size_t)n, sys_read, sys_write);
837 /*******************************************************************
838 Sleep for a specified number of milliseconds.
839 ********************************************************************/
841 void smb_msleep(unsigned int t)
843 #if defined(HAVE_NANOSLEEP)
844 struct timespec tval;
847 tval.tv_sec = t/1000;
848 tval.tv_nsec = 1000000*(t%1000);
852 ret = nanosleep(&tval, &tval);
853 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
855 unsigned int tdiff=0;
856 struct timeval tval,t1,t2;
863 tval.tv_sec = (t-tdiff)/1000;
864 tval.tv_usec = 1000*((t-tdiff)%1000);
866 /* Never wait for more than 1 sec. */
867 if (tval.tv_sec > 1) {
874 sys_select_intr(0,&fds,NULL,NULL,&tval);
877 if (t2.tv_sec < t1.tv_sec) {
878 /* Someone adjusted time... */
882 tdiff = TvalDiff(&t1,&t2);
887 /****************************************************************************
888 Become a daemon, discarding the controlling terminal.
889 ****************************************************************************/
891 void become_daemon(BOOL Fork, BOOL no_process_group)
899 /* detach from the terminal */
901 if (!no_process_group) setsid();
902 #elif defined(TIOCNOTTY)
903 if (!no_process_group) {
904 int i = sys_open("/dev/tty", O_RDWR, 0);
906 ioctl(i, (int) TIOCNOTTY, (char *)0);
910 #endif /* HAVE_SETSID */
912 /* Close fd's 0,1,2. Needed if started by rsh */
913 close_low_fds(False); /* Don't close stderr, let the debug system
914 attach it to the logfile */
917 /****************************************************************************
918 Put up a yes/no prompt.
919 ****************************************************************************/
926 if (!fgets(ans,sizeof(ans)-1,stdin))
929 if (*ans == 'y' || *ans == 'Y')
935 #if defined(PARANOID_MALLOC_CHECKER)
937 /****************************************************************************
938 Internal malloc wrapper. Externally visible.
939 ****************************************************************************/
941 void *malloc_(size_t size)
948 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
951 /****************************************************************************
952 Internal calloc wrapper. Not externally visible.
953 ****************************************************************************/
955 static void *calloc_(size_t count, size_t size)
957 if (size == 0 || count == 0) {
961 return calloc(count, size);
962 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
965 /****************************************************************************
966 Internal realloc wrapper. Not externally visible.
967 ****************************************************************************/
969 static void *realloc_(void *ptr, size_t size)
972 return realloc(ptr, size);
973 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
976 #endif /* PARANOID_MALLOC_CHECKER */
978 /****************************************************************************
980 ****************************************************************************/
982 void *malloc_array(size_t el_size, unsigned int count)
984 if (count >= MAX_ALLOC_SIZE/el_size) {
988 if (el_size == 0 || count == 0) {
991 #if defined(PARANOID_MALLOC_CHECKER)
992 return malloc_(el_size*count);
994 return malloc(el_size*count);
998 /****************************************************************************
1000 ****************************************************************************/
1002 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1004 if (count >= MAX_ALLOC_SIZE/el_size) {
1008 return sys_memalign(align, el_size*count);
1011 /****************************************************************************
1013 ****************************************************************************/
1015 void *calloc_array(size_t size, size_t nmemb)
1017 if (nmemb >= MAX_ALLOC_SIZE/size) {
1020 if (size == 0 || nmemb == 0) {
1023 #if defined(PARANOID_MALLOC_CHECKER)
1024 return calloc_(nmemb, size);
1026 return calloc(nmemb, size);
1030 /****************************************************************************
1031 Expand a pointer to be a particular size.
1032 Note that this version of Realloc has an extra parameter that decides
1033 whether to free the passed in storage on allocation failure or if the
1036 This is designed for use in the typical idiom of :
1038 p = SMB_REALLOC(p, size)
1043 and not to have to keep track of the old 'p' contents to free later, nor
1044 to worry if the size parameter was zero. In the case where NULL is returned
1045 we guarentee that p has been freed.
1047 If free later semantics are desired, then pass 'free_old_on_error' as False which
1048 guarentees that the old contents are not freed on error, even if size == 0. To use
1051 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1059 Changes were instigated by Coverity error checking. JRA.
1060 ****************************************************************************/
1062 void *Realloc(void *p, size_t size, BOOL free_old_on_error)
1067 if (free_old_on_error) {
1070 DEBUG(2,("Realloc asked for 0 bytes\n"));
1074 #if defined(PARANOID_MALLOC_CHECKER)
1076 ret = (void *)malloc_(size);
1078 ret = (void *)realloc_(p,size);
1082 ret = (void *)malloc(size);
1084 ret = (void *)realloc(p,size);
1089 if (free_old_on_error && p) {
1092 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1098 /****************************************************************************
1100 ****************************************************************************/
1102 void *realloc_array(void *p, size_t el_size, unsigned int count, BOOL free_old_on_error)
1104 if (count >= MAX_ALLOC_SIZE/el_size) {
1105 if (free_old_on_error) {
1110 return Realloc(p, el_size*count, free_old_on_error);
1113 /****************************************************************************
1114 (Hopefully) efficient array append.
1115 ****************************************************************************/
1117 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1118 void *element, void *_array, uint32 *num_elements,
1119 ssize_t *array_size)
1121 void **array = (void **)_array;
1123 if (*array_size < 0) {
1127 if (*array == NULL) {
1128 if (*array_size == 0) {
1132 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1136 *array = TALLOC(mem_ctx, element_size * (*array_size));
1137 if (*array == NULL) {
1142 if (*num_elements == *array_size) {
1145 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1149 *array = TALLOC_REALLOC(mem_ctx, *array,
1150 element_size * (*array_size));
1152 if (*array == NULL) {
1157 memcpy((char *)(*array) + element_size*(*num_elements),
1158 element, element_size);
1168 /****************************************************************************
1169 Free memory, checks for NULL.
1170 Use directly SAFE_FREE()
1171 Exists only because we need to pass a function pointer somewhere --SSS
1172 ****************************************************************************/
1174 void safe_free(void *p)
1179 /****************************************************************************
1180 Get my own name and IP.
1181 ****************************************************************************/
1183 BOOL get_myname(char *my_name)
1189 /* get my host name */
1190 if (gethostname(hostname, sizeof(hostname)) == -1) {
1191 DEBUG(0,("gethostname failed\n"));
1195 /* Ensure null termination. */
1196 hostname[sizeof(hostname)-1] = '\0';
1199 /* split off any parts after an initial . */
1200 char *p = strchr_m(hostname,'.');
1205 fstrcpy(my_name,hostname);
1211 /****************************************************************************
1212 Get my own canonical name, including domain.
1213 ****************************************************************************/
1215 BOOL get_mydnsfullname(fstring my_dnsname)
1217 static fstring dnshostname;
1220 if (!*dnshostname) {
1221 /* get my host name */
1222 if (gethostname(dnshostname, sizeof(dnshostname)) == -1) {
1223 *dnshostname = '\0';
1224 DEBUG(0,("gethostname failed\n"));
1228 /* Ensure null termination. */
1229 dnshostname[sizeof(dnshostname)-1] = '\0';
1231 /* Ensure we get the cannonical name. */
1232 if (!(hp = sys_gethostbyname(dnshostname))) {
1233 *dnshostname = '\0';
1236 fstrcpy(dnshostname, hp->h_name);
1238 fstrcpy(my_dnsname, dnshostname);
1242 /****************************************************************************
1243 Get my own domain name.
1244 ****************************************************************************/
1246 BOOL get_mydnsdomname(fstring my_domname)
1252 if (!get_mydnsfullname(domname)) {
1255 p = strchr_m(domname, '.');
1258 fstrcpy(my_domname, p);
1265 /****************************************************************************
1266 Interpret a protocol description string, with a default.
1267 ****************************************************************************/
1269 int interpret_protocol(const char *str,int def)
1271 if (strequal(str,"NT1"))
1272 return(PROTOCOL_NT1);
1273 if (strequal(str,"LANMAN2"))
1274 return(PROTOCOL_LANMAN2);
1275 if (strequal(str,"LANMAN1"))
1276 return(PROTOCOL_LANMAN1);
1277 if (strequal(str,"CORE"))
1278 return(PROTOCOL_CORE);
1279 if (strequal(str,"COREPLUS"))
1280 return(PROTOCOL_COREPLUS);
1281 if (strequal(str,"CORE+"))
1282 return(PROTOCOL_COREPLUS);
1284 DEBUG(0,("Unrecognised protocol level %s\n",str));
1289 /****************************************************************************
1290 Return true if a string could be a pure IP address.
1291 ****************************************************************************/
1293 BOOL is_ipaddress(const char *str)
1295 BOOL pure_address = True;
1298 for (i=0; pure_address && str[i]; i++)
1299 if (!(isdigit((int)str[i]) || str[i] == '.'))
1300 pure_address = False;
1302 /* Check that a pure number is not misinterpreted as an IP */
1303 pure_address = pure_address && (strchr_m(str, '.') != NULL);
1305 return pure_address;
1308 /****************************************************************************
1309 Interpret an internet address or name into an IP address in 4 byte form.
1310 ****************************************************************************/
1312 uint32 interpret_addr(const char *str)
1317 if (strcmp(str,"0.0.0.0") == 0)
1319 if (strcmp(str,"255.255.255.255") == 0)
1322 /* if it's in the form of an IP address then get the lib to interpret it */
1323 if (is_ipaddress(str)) {
1324 res = inet_addr(str);
1326 /* otherwise assume it's a network name of some sort and use
1327 sys_gethostbyname */
1328 if ((hp = sys_gethostbyname(str)) == 0) {
1329 DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
1333 if(hp->h_addr == NULL) {
1334 DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
1337 putip((char *)&res,(char *)hp->h_addr);
1340 if (res == (uint32)-1)
1346 /*******************************************************************
1347 A convenient addition to interpret_addr().
1348 ******************************************************************/
1350 struct in_addr *interpret_addr2(const char *str)
1352 static struct in_addr ret;
1353 uint32 a = interpret_addr(str);
1358 /*******************************************************************
1359 Check if an IP is the 0.0.0.0.
1360 ******************************************************************/
1362 BOOL is_zero_ip(struct in_addr ip)
1365 putip((char *)&a,(char *)&ip);
1369 /*******************************************************************
1370 Set an IP to 0.0.0.0.
1371 ******************************************************************/
1373 void zero_ip(struct in_addr *ip)
1376 static struct in_addr ipzero;
1379 ipzero = *interpret_addr2("0.0.0.0");
1386 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1387 /******************************************************************
1388 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1389 Based on a fix from <Thomas.Hepper@icem.de>.
1390 *******************************************************************/
1392 static void strip_mount_options( pstring *str)
1396 while(*p && !isspace(*p))
1398 while(*p && isspace(*p))
1403 pstrcpy(tmp_str, p);
1404 pstrcpy(*str, tmp_str);
1409 /*******************************************************************
1410 Patch from jkf@soton.ac.uk
1411 Split Luke's automount_server into YP lookup and string splitter
1412 so can easily implement automount_path().
1413 As we may end up doing both, cache the last YP result.
1414 *******************************************************************/
1416 #ifdef WITH_NISPLUS_HOME
1417 char *automount_lookup(const char *user_name)
1419 static fstring last_key = "";
1420 static pstring last_value = "";
1422 char *nis_map = (char *)lp_nis_home_map_name();
1424 char buffer[NIS_MAXATTRVAL + 1];
1429 if (strcmp(user_name, last_key)) {
1430 slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
1431 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1433 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1434 if (result->status != NIS_SUCCESS) {
1435 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1436 fstrcpy(last_key, ""); pstrcpy(last_value, "");
1438 object = result->objects.objects_val;
1439 if (object->zo_data.zo_type == ENTRY_OBJ) {
1440 entry = &object->zo_data.objdata_u.en_data;
1441 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1442 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1444 pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1445 pstring_sub(last_value, "&", user_name);
1446 fstrcpy(last_key, user_name);
1450 nis_freeresult(result);
1453 strip_mount_options(&last_value);
1455 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
1458 #else /* WITH_NISPLUS_HOME */
1460 char *automount_lookup(const char *user_name)
1462 static fstring last_key = "";
1463 static pstring last_value = "";
1465 int nis_error; /* returned by yp all functions */
1466 char *nis_result; /* yp_match inits this */
1467 int nis_result_len; /* and set this */
1468 char *nis_domain; /* yp_get_default_domain inits this */
1469 char *nis_map = (char *)lp_nis_home_map_name();
1471 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1472 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1476 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1478 if (!strcmp(user_name, last_key)) {
1479 nis_result = last_value;
1480 nis_result_len = strlen(last_value);
1483 if ((nis_error = yp_match(nis_domain, nis_map, user_name, strlen(user_name),
1484 &nis_result, &nis_result_len)) == 0) {
1485 fstrcpy(last_key, user_name);
1486 pstrcpy(last_value, nis_result);
1487 strip_mount_options(&last_value);
1489 } else if(nis_error == YPERR_KEY) {
1491 /* If Key lookup fails user home server is not in nis_map
1492 use default information for server, and home directory */
1494 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1495 user_name, nis_map));
1496 DEBUG(3, ("using defaults for server and home directory\n"));
1498 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1499 yperr_string(nis_error), user_name, nis_map));
1503 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
1506 #endif /* WITH_NISPLUS_HOME */
1509 /*******************************************************************
1510 Are two IPs on the same subnet?
1511 ********************************************************************/
1513 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
1515 uint32 net1,net2,nmask;
1517 nmask = ntohl(mask.s_addr);
1518 net1 = ntohl(ip1.s_addr);
1519 net2 = ntohl(ip2.s_addr);
1521 return((net1 & nmask) == (net2 & nmask));
1525 /****************************************************************************
1526 Check if a process exists. Does this work on all unixes?
1527 ****************************************************************************/
1529 BOOL process_exists(const struct server_id pid)
1531 if (procid_is_me(&pid)) {
1535 if (procid_is_local(&pid)) {
1536 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1539 #ifdef CLUSTER_SUPPORT
1540 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1547 BOOL process_exists_by_pid(pid_t pid)
1549 /* Doing kill with a non-positive pid causes messages to be
1550 * sent to places we don't want. */
1551 SMB_ASSERT(pid > 0);
1552 return(kill(pid,0) == 0 || errno != ESRCH);
1555 /*******************************************************************
1556 Convert a uid into a user name.
1557 ********************************************************************/
1559 const char *uidtoname(uid_t uid)
1561 TALLOC_CTX *ctx = talloc_tos();
1563 struct passwd *pass = NULL;
1565 pass = getpwuid_alloc(ctx,uid);
1567 name = talloc_strdup(ctx,pass->pw_name);
1570 name = talloc_asprintf(ctx,
1577 /*******************************************************************
1578 Convert a gid into a group name.
1579 ********************************************************************/
1581 char *gidtoname(gid_t gid)
1586 grp = getgrgid(gid);
1588 fstrcpy(name, grp->gr_name);
1591 slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1593 return talloc_strdup(talloc_tos(), name);
1596 /*******************************************************************
1597 Convert a user name into a uid.
1598 ********************************************************************/
1600 uid_t nametouid(const char *name)
1602 struct passwd *pass;
1606 pass = getpwnam_alloc(NULL, name);
1613 u = (uid_t)strtol(name, &p, 0);
1614 if ((p != name) && (*p == '\0'))
1620 /*******************************************************************
1621 Convert a name to a gid_t if possible. Return -1 if not a group.
1622 ********************************************************************/
1624 gid_t nametogid(const char *name)
1630 g = (gid_t)strtol(name, &p, 0);
1631 if ((p != name) && (*p == '\0'))
1634 grp = sys_getgrnam(name);
1636 return(grp->gr_gid);
1640 /*******************************************************************
1641 Something really nasty happened - panic !
1642 ********************************************************************/
1644 void smb_panic(const char *const why)
1652 if (global_clobber_region_function) {
1653 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1654 global_clobber_region_function,
1655 global_clobber_region_line));
1660 DEBUG(0,("PANIC (pid %llu): %s\n",
1661 (unsigned long long)sys_getpid(), why));
1664 cmd = lp_panic_action();
1666 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1667 result = system(cmd);
1670 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1673 DEBUG(0, ("smb_panic(): action returned status %d\n",
1674 WEXITSTATUS(result)));
1680 /*******************************************************************
1681 Print a backtrace of the stack to the debug log. This function
1682 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1683 exit shortly after calling it.
1684 ********************************************************************/
1686 #ifdef HAVE_LIBUNWIND_H
1687 #include <libunwind.h>
1690 #ifdef HAVE_EXECINFO_H
1691 #include <execinfo.h>
1694 #ifdef HAVE_LIBEXC_H
1698 void log_stack_trace(void)
1700 #ifdef HAVE_LIBUNWIND
1701 /* Try to use libunwind before any other technique since on ia64
1702 * libunwind correctly walks the stack in more circumstances than
1705 unw_cursor_t cursor;
1710 unw_word_t ip, sp, off;
1712 procname[sizeof(procname) - 1] = '\0';
1714 if (unw_getcontext(&uc) != 0) {
1715 goto libunwind_failed;
1718 if (unw_init_local(&cursor, &uc) != 0) {
1719 goto libunwind_failed;
1722 DEBUG(0, ("BACKTRACE:\n"));
1726 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1727 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1729 switch (unw_get_proc_name(&cursor,
1730 procname, sizeof(procname) - 1, &off) ) {
1734 /* Name truncated. */
1735 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1736 i, procname, (long long)off,
1737 (long long)ip, (long long) sp));
1740 /* case -UNW_ENOINFO: */
1741 /* case -UNW_EUNSPEC: */
1742 /* No symbol name found. */
1743 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1744 i, "<unknown symbol>",
1745 (long long)ip, (long long) sp));
1748 } while (unw_step(&cursor) > 0);
1753 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1755 #elif HAVE_BACKTRACE_SYMBOLS
1756 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1757 size_t backtrace_size;
1758 char **backtrace_strings;
1760 /* get the backtrace (stack frames) */
1761 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1762 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1764 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1765 (unsigned long)backtrace_size));
1767 if (backtrace_strings) {
1770 for (i = 0; i < backtrace_size; i++)
1771 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1773 /* Leak the backtrace_strings, rather than risk what free() might do */
1778 /* The IRIX libexc library provides an API for unwinding the stack. See
1779 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1780 * since we are about to abort anyway, it hardly matters.
1783 #define NAMESIZE 32 /* Arbitrary */
1785 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1786 char * names[BACKTRACE_STACK_SIZE];
1787 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1794 ZERO_ARRAY(namebuf);
1796 /* We need to be root so we can open our /proc entry to walk
1797 * our stack. It also helps when we want to dump core.
1801 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1802 names[i] = namebuf + (i * NAMESIZE);
1805 levels = trace_back_stack(0, addrs, names,
1806 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1808 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1809 for (i = 0; i < levels; i++) {
1810 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1815 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1819 /*******************************************************************
1820 A readdir wrapper which just returns the file name.
1821 ********************************************************************/
1823 const char *readdirname(SMB_STRUCT_DIR *p)
1825 SMB_STRUCT_DIRENT *ptr;
1831 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1835 dname = ptr->d_name;
1842 #ifdef HAVE_BROKEN_READDIR_NAME
1843 /* using /usr/ucb/cc is BAD */
1847 return talloc_strdup(talloc_tos(), dname);
1850 /*******************************************************************
1851 Utility function used to decide if the last component
1852 of a path matches a (possibly wildcarded) entry in a namelist.
1853 ********************************************************************/
1855 BOOL is_in_path(const char *name, name_compare_entry *namelist, BOOL case_sensitive)
1857 const char *last_component;
1859 /* if we have no list it's obviously not in the path */
1860 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1864 DEBUG(8, ("is_in_path: %s\n", name));
1866 /* Get the last component of the unix name. */
1867 last_component = strrchr_m(name, '/');
1868 if (!last_component) {
1869 last_component = name;
1871 last_component++; /* Go past '/' */
1874 for(; namelist->name != NULL; namelist++) {
1875 if(namelist->is_wild) {
1876 if (mask_match(last_component, namelist->name, case_sensitive)) {
1877 DEBUG(8,("is_in_path: mask match succeeded\n"));
1881 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1882 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1883 DEBUG(8,("is_in_path: match succeeded\n"));
1888 DEBUG(8,("is_in_path: match not found\n"));
1892 /*******************************************************************
1893 Strip a '/' separated list into an array of
1894 name_compare_enties structures suitable for
1895 passing to is_in_path(). We do this for
1896 speed so we can pre-parse all the names in the list
1897 and don't do it for each call to is_in_path().
1898 namelist is modified here and is assumed to be
1899 a copy owned by the caller.
1900 We also check if the entry contains a wildcard to
1901 remove a potentially expensive call to mask_match
1903 ********************************************************************/
1905 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1908 char *nameptr = namelist;
1909 int num_entries = 0;
1912 (*ppname_array) = NULL;
1914 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1917 /* We need to make two passes over the string. The
1918 first to count the number of elements, the second
1923 if ( *nameptr == '/' ) {
1924 /* cope with multiple (useless) /s) */
1928 /* find the next / */
1929 name_end = strchr_m(nameptr, '/');
1931 /* oops - the last check for a / didn't find one. */
1932 if (name_end == NULL)
1935 /* next segment please */
1936 nameptr = name_end + 1;
1940 if(num_entries == 0)
1943 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1944 DEBUG(0,("set_namearray: malloc fail\n"));
1948 /* Now copy out the names */
1952 if ( *nameptr == '/' ) {
1953 /* cope with multiple (useless) /s) */
1957 /* find the next / */
1958 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1961 /* oops - the last check for a / didn't find one. */
1962 if(name_end == NULL)
1965 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1966 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1967 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1971 /* next segment please */
1972 nameptr = name_end + 1;
1976 (*ppname_array)[i].name = NULL;
1981 /****************************************************************************
1982 Routine to free a namearray.
1983 ****************************************************************************/
1985 void free_namearray(name_compare_entry *name_array)
1989 if(name_array == NULL)
1992 for(i=0; name_array[i].name!=NULL; i++)
1993 SAFE_FREE(name_array[i].name);
1994 SAFE_FREE(name_array);
1998 #define DBGC_CLASS DBGC_LOCKING
2000 /****************************************************************************
2001 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
2002 is dealt with in posix.c
2003 Returns True if the lock was granted, False otherwise.
2004 ****************************************************************************/
2006 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
2008 SMB_STRUCT_FLOCK lock;
2011 DEBUG(8,("fcntl_lock fd=%d op=%d offset=%.0f count=%.0f type=%d\n",
2012 fd,op,(double)offset,(double)count,type));
2015 lock.l_whence = SEEK_SET;
2016 lock.l_start = offset;
2020 ret = sys_fcntl_ptr(fd,op,&lock);
2024 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
2025 (double)offset,(double)count,op,type,strerror(errno)));
2030 /* everything went OK */
2031 DEBUG(8,("fcntl_lock: Lock call successful\n"));
2036 /****************************************************************************
2037 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
2038 is dealt with in posix.c
2039 Returns True if we have information regarding this lock region (and returns
2040 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
2041 ****************************************************************************/
2043 BOOL fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
2045 SMB_STRUCT_FLOCK lock;
2048 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
2049 fd,(double)*poffset,(double)*pcount,*ptype));
2051 lock.l_type = *ptype;
2052 lock.l_whence = SEEK_SET;
2053 lock.l_start = *poffset;
2054 lock.l_len = *pcount;
2057 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
2061 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
2062 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
2067 *ptype = lock.l_type;
2068 *poffset = lock.l_start;
2069 *pcount = lock.l_len;
2072 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
2073 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
2078 #define DBGC_CLASS DBGC_ALL
2080 /*******************************************************************
2081 Is the name specified one of my netbios names.
2082 Returns true if it is equal, false otherwise.
2083 ********************************************************************/
2085 BOOL is_myname(const char *s)
2090 for (n=0; my_netbios_names(n); n++) {
2091 if (strequal(my_netbios_names(n), s)) {
2096 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
2100 BOOL is_myname_or_ipaddr(const char *s)
2102 fstring name, dnsname;
2108 /* santize the string from '\\name' */
2112 servername = strrchr_m( name, '\\' );
2118 /* optimize for the common case */
2120 if (strequal(servername, global_myname()))
2123 /* check for an alias */
2125 if (is_myname(servername))
2128 /* check for loopback */
2130 if (strequal(servername, "127.0.0.1"))
2133 if (strequal(servername, "localhost"))
2136 /* maybe it's my dns name */
2138 if ( get_mydnsfullname( dnsname ) )
2139 if ( strequal( servername, dnsname ) )
2142 /* handle possible CNAME records */
2144 if ( !is_ipaddress( servername ) ) {
2145 /* use DNS to resolve the name, but only the first address */
2148 if (((hp = sys_gethostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
2149 struct in_addr return_ip;
2150 putip( (char*)&return_ip, (char*)hp->h_addr );
2151 fstrcpy( name, inet_ntoa( return_ip ) );
2156 /* maybe its an IP address? */
2157 if (is_ipaddress(servername)) {
2158 struct iface_struct nics[MAX_INTERFACES];
2162 ip = interpret_addr(servername);
2163 if ((ip==0) || (ip==0xffffffff))
2166 n = get_interfaces(nics, MAX_INTERFACES);
2167 for (i=0; i<n; i++) {
2168 if (ip == nics[i].iface_addr.ip.s_addr)
2177 /*******************************************************************
2178 Is the name specified our workgroup/domain.
2179 Returns true if it is equal, false otherwise.
2180 ********************************************************************/
2182 BOOL is_myworkgroup(const char *s)
2186 if (strequal(s, lp_workgroup())) {
2190 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
2194 /*******************************************************************
2195 we distinguish between 2K and XP by the "Native Lan Manager" string
2196 WinXP => "Windows 2002 5.1"
2197 WinXP 64bit => "Windows XP 5.2"
2198 Win2k => "Windows 2000 5.0"
2199 NT4 => "Windows NT 4.0"
2200 Win9x => "Windows 4.0"
2201 Windows 2003 doesn't set the native lan manager string but
2202 they do set the domain to "Windows 2003 5.2" (probably a bug).
2203 ********************************************************************/
2205 void ra_lanman_string( const char *native_lanman )
2207 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
2208 set_remote_arch( RA_WINXP );
2209 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
2210 set_remote_arch( RA_WINXP );
2211 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
2212 set_remote_arch( RA_WIN2K3 );
2215 /*******************************************************************
2216 Set the horrid remote_arch string based on an enum.
2217 ********************************************************************/
2219 void set_remote_arch(enum remote_arch_types type)
2224 fstrcpy(remote_arch, "WfWg");
2227 fstrcpy(remote_arch, "OS2");
2230 fstrcpy(remote_arch, "Win95");
2233 fstrcpy(remote_arch, "WinNT");
2236 fstrcpy(remote_arch, "Win2K");
2239 fstrcpy(remote_arch, "WinXP");
2242 fstrcpy(remote_arch, "Win2K3");
2245 fstrcpy(remote_arch, "Vista");
2248 fstrcpy(remote_arch,"Samba");
2251 fstrcpy(remote_arch,"CIFSFS");
2254 ra_type = RA_UNKNOWN;
2255 fstrcpy(remote_arch, "UNKNOWN");
2259 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n", remote_arch));
2262 /*******************************************************************
2263 Get the remote_arch type.
2264 ********************************************************************/
2266 enum remote_arch_types get_remote_arch(void)
2271 void print_asc(int level, const unsigned char *buf,int len)
2275 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
2278 void dump_data(int level, const unsigned char *buf1,int len)
2280 const unsigned char *buf = (const unsigned char *)buf1;
2284 if (!DEBUGLVL(level)) return;
2286 DEBUGADD(level,("[%03X] ",i));
2288 DEBUGADD(level,("%02X ",(int)buf[i]));
2290 if (i%8 == 0) DEBUGADD(level,(" "));
2292 print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
2293 print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
2294 if (i<len) DEBUGADD(level,("[%03X] ",i));
2300 DEBUGADD(level,(" "));
2301 if (n>8) DEBUGADD(level,(" "));
2302 while (n--) DEBUGADD(level,(" "));
2304 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2306 if (n>0) print_asc(level,&buf[i-n],n);
2307 DEBUGADD(level,("\n"));
2311 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2313 #ifdef DEBUG_PASSWORD
2314 DEBUG(11, ("%s", msg));
2315 if (data != NULL && len > 0)
2317 dump_data(11, data, len);
2322 char *tab_depth(int depth)
2324 static pstring spaces;
2325 memset(spaces, ' ', depth * 4);
2326 spaces[depth * 4] = 0;
2330 /*****************************************************************************
2331 Provide a checksum on a string
2333 Input: s - the null-terminated character string for which the checksum
2336 Output: The checksum value calculated for s.
2337 *****************************************************************************/
2339 int str_checksum(const char *s)
2347 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2354 /*****************************************************************
2355 Zero a memory area then free it. Used to catch bugs faster.
2356 *****************************************************************/
2358 void zero_free(void *p, size_t size)
2364 /*****************************************************************
2365 Set our open file limit to a requested max and return the limit.
2366 *****************************************************************/
2368 int set_maxfiles(int requested_max)
2370 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2372 int saved_current_limit;
2374 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2375 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2378 return requested_max;
2382 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2383 * account for the extra fd we need
2384 * as well as the log files and standard
2385 * handles etc. Save the limit we want to set in case
2386 * we are running on an OS that doesn't support this limit (AIX)
2387 * which always returns RLIM_INFINITY for rlp.rlim_max.
2390 /* Try raising the hard (max) limit to the requested amount. */
2392 #if defined(RLIM_INFINITY)
2393 if (rlp.rlim_max != RLIM_INFINITY) {
2394 int orig_max = rlp.rlim_max;
2396 if ( rlp.rlim_max < requested_max )
2397 rlp.rlim_max = requested_max;
2399 /* This failing is not an error - many systems (Linux) don't
2400 support our default request of 10,000 open files. JRA. */
2402 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2403 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2404 (int)rlp.rlim_max, strerror(errno) ));
2406 /* Set failed - restore original value from get. */
2407 rlp.rlim_max = orig_max;
2412 /* Now try setting the soft (current) limit. */
2414 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2416 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2417 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2418 (int)rlp.rlim_cur, strerror(errno) ));
2420 return saved_current_limit;
2423 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2424 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2427 return saved_current_limit;
2430 #if defined(RLIM_INFINITY)
2431 if(rlp.rlim_cur == RLIM_INFINITY)
2432 return saved_current_limit;
2435 if((int)rlp.rlim_cur > saved_current_limit)
2436 return saved_current_limit;
2438 return rlp.rlim_cur;
2439 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2441 * No way to know - just guess...
2443 return requested_max;
2447 /*****************************************************************
2448 Possibly replace mkstemp if it is broken.
2449 *****************************************************************/
2451 int smb_mkstemp(char *name_template)
2453 #if HAVE_SECURE_MKSTEMP
2454 return mkstemp(name_template);
2456 /* have a reasonable go at emulating it. Hope that
2457 the system mktemp() isn't completly hopeless */
2458 char *p = mktemp(name_template);
2461 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2465 /*****************************************************************
2466 malloc that aborts with smb_panic on fail or zero size.
2467 *****************************************************************/
2469 void *smb_xmalloc_array(size_t size, unsigned int count)
2473 smb_panic("smb_xmalloc_array: called with zero size");
2475 if (count >= MAX_ALLOC_SIZE/size) {
2476 smb_panic("smb_xmalloc_array: alloc size too large");
2478 if ((p = SMB_MALLOC(size*count)) == NULL) {
2479 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2480 (unsigned long)size, (unsigned long)count));
2481 smb_panic("smb_xmalloc_array: malloc failed");
2487 Memdup with smb_panic on fail.
2490 void *smb_xmemdup(const void *p, size_t size)
2493 p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2494 memcpy(p2, p, size);
2499 strdup that aborts on malloc fail.
2502 char *smb_xstrdup(const char *s)
2504 #if defined(PARANOID_MALLOC_CHECKER)
2511 #define strdup rep_strdup
2514 char *s1 = strdup(s);
2515 #if defined(PARANOID_MALLOC_CHECKER)
2519 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2522 smb_panic("smb_xstrdup: malloc failed");
2529 strndup that aborts on malloc fail.
2532 char *smb_xstrndup(const char *s, size_t n)
2534 #if defined(PARANOID_MALLOC_CHECKER)
2540 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
2542 #define strndup rep_strndup
2545 char *s1 = strndup(s, n);
2546 #if defined(PARANOID_MALLOC_CHECKER)
2550 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2553 smb_panic("smb_xstrndup: malloc failed");
2559 vasprintf that aborts on malloc fail
2562 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2569 n = vasprintf(ptr, format, ap2);
2570 if (n == -1 || ! *ptr) {
2571 smb_panic("smb_xvasprintf: out of memory");
2576 /*****************************************************************
2577 Like strdup but for memory.
2578 *****************************************************************/
2580 void *memdup(const void *p, size_t size)
2585 p2 = SMB_MALLOC(size);
2588 memcpy(p2, p, size);
2592 /*****************************************************************
2593 Get local hostname and cache result.
2594 *****************************************************************/
2596 char *myhostname(void)
2604 /*****************************************************************
2605 A useful function for returning a path in the Samba lock directory.
2606 *****************************************************************/
2608 char *lock_path(const char *name)
2612 pstrcpy(fname,lp_lockdir());
2613 trim_char(fname,'\0','/');
2615 if (!directory_exist(fname,NULL))
2619 pstrcat(fname,name);
2621 return talloc_strdup(talloc_tos(), fname);
2624 /*****************************************************************
2625 A useful function for returning a path in the Samba pid directory.
2626 *****************************************************************/
2628 char *pid_path(const char *name)
2632 pstrcpy(fname,lp_piddir());
2633 trim_char(fname,'\0','/');
2635 if (!directory_exist(fname,NULL))
2639 pstrcat(fname,name);
2641 return talloc_strdup(talloc_tos(), fname);
2645 * @brief Returns an absolute path to a file in the Samba lib directory.
2647 * @param name File to find, relative to LIBDIR.
2649 * @retval Pointer to a static #pstring containing the full path.
2652 char *lib_path(const char *name)
2654 return talloc_asprintf(talloc_tos(), "%s/%s", dyn_LIBDIR, name);
2658 * @brief Returns the platform specific shared library extension.
2660 * @retval Pointer to a static #fstring containing the extension.
2663 const char *shlib_ext(void)
2665 return dyn_SHLIBEXT;
2668 /*******************************************************************
2669 Given a filename - get its directory name
2670 NB: Returned in static storage. Caveats:
2671 o If caller wishes to preserve, they should copy.
2672 ********************************************************************/
2674 char *parent_dirname(const char *path)
2678 if (!parent_dirname_talloc(talloc_tos(), path, &parent, NULL)) {
2685 BOOL parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2686 char **parent, const char **name)
2691 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2694 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2705 if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2708 memcpy(*parent, dir, len);
2709 (*parent)[len] = '\0';
2717 /*******************************************************************
2718 Determine if a pattern contains any Microsoft wildcard characters.
2719 *******************************************************************/
2721 BOOL ms_has_wild(const char *s)
2725 if (lp_posix_pathnames()) {
2726 /* With posix pathnames no characters are wild. */
2730 while ((c = *s++)) {
2743 BOOL ms_has_wild_w(const smb_ucs2_t *s)
2746 if (!s) return False;
2747 while ((c = *s++)) {
2749 case UCS2_CHAR('*'):
2750 case UCS2_CHAR('?'):
2751 case UCS2_CHAR('<'):
2752 case UCS2_CHAR('>'):
2753 case UCS2_CHAR('"'):
2760 /*******************************************************************
2761 A wrapper that handles case sensitivity and the special handling
2763 *******************************************************************/
2765 BOOL mask_match(const char *string, const char *pattern, BOOL is_case_sensitive)
2767 if (strcmp(string,"..") == 0)
2769 if (strcmp(pattern,".") == 0)
2772 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2775 /*******************************************************************
2776 A wrapper that handles case sensitivity and the special handling
2777 of the ".." name. Varient that is only called by old search code which requires
2778 pattern translation.
2779 *******************************************************************/
2781 BOOL mask_match_search(const char *string, const char *pattern, BOOL is_case_sensitive)
2783 if (strcmp(string,"..") == 0)
2785 if (strcmp(pattern,".") == 0)
2788 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2791 /*******************************************************************
2792 A wrapper that handles a list of patters and calls mask_match()
2793 on each. Returns True if any of the patterns match.
2794 *******************************************************************/
2796 BOOL mask_match_list(const char *string, char **list, int listLen, BOOL is_case_sensitive)
2798 while (listLen-- > 0) {
2799 if (mask_match(string, *list++, is_case_sensitive))
2805 /*********************************************************
2806 Recursive routine that is called by unix_wild_match.
2807 *********************************************************/
2809 static BOOL unix_do_match(const char *regexp, const char *str)
2813 for( p = regexp; *p && *str; ) {
2824 * Look for a character matching
2825 * the one after the '*'.
2829 return True; /* Automatic match */
2832 while(*str && (*p != *str))
2836 * Patch from weidel@multichart.de. In the case of the regexp
2837 * '*XX*' we want to ensure there are at least 2 'X' characters
2838 * in the string after the '*' for a match to be made.
2845 * Eat all the characters that match, but count how many there were.
2848 while(*str && (*p == *str)) {
2854 * Now check that if the regexp had n identical characters that
2855 * matchcount had at least that many matches.
2858 while ( *(p+1) && (*(p+1) == *p)) {
2863 if ( matchcount <= 0 )
2867 str--; /* We've eaten the match char after the '*' */
2869 if(unix_do_match(p, str))
2891 if (!*p && str[0] == '.' && str[1] == 0)
2894 if (!*str && *p == '?') {
2900 if(!*str && (*p == '*' && p[1] == '\0'))
2906 /*******************************************************************
2907 Simple case insensitive interface to a UNIX wildcard matcher.
2908 Returns True if match, False if not.
2909 *******************************************************************/
2911 BOOL unix_wild_match(const char *pattern, const char *string)
2916 pstrcpy(p2, pattern);
2917 pstrcpy(s2, string);
2921 /* Remove any *? and ** from the pattern as they are meaningless */
2922 for(p = p2; *p; p++)
2923 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
2924 pstrcpy( &p[1], &p[2]);
2926 if (strequal(p2,"*"))
2929 return unix_do_match(p2, s2);
2932 /**********************************************************************
2933 Converts a name to a fully qualified domain name.
2934 Returns True if lookup succeeded, False if not (then fqdn is set to name)
2935 ***********************************************************************/
2937 BOOL name_to_fqdn(fstring fqdn, const char *name)
2939 struct hostent *hp = sys_gethostbyname(name);
2941 if ( hp && hp->h_name && *hp->h_name ) {
2944 /* find out if the fqdn is returned as an alias
2945 * to cope with /etc/hosts files where the first
2946 * name is not the fqdn but the short name */
2947 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2949 for (i = 0; hp->h_aliases[i]; i++) {
2950 if (strchr_m(hp->h_aliases[i], '.')) {
2951 full = hp->h_aliases[i];
2956 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2957 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2958 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2959 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2960 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2968 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2969 fstrcpy(fqdn, full);
2972 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2973 fstrcpy(fqdn, name);
2978 /**********************************************************************
2979 Extension to talloc_get_type: Abort on type mismatch
2980 ***********************************************************************/
2982 void *talloc_check_name_abort(const void *ptr, const char *name)
2986 result = talloc_check_name(ptr, name);
2990 DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
2991 name, talloc_get_name(ptr)));
2992 smb_panic("talloc type mismatch");
2993 /* Keep the compiler happy */
3000 /*******************************************************************
3001 This routine is a trick to immediately catch errors when debugging
3002 with insure. A xterm with a gdb is popped up when insure catches
3003 a error. It is Linux specific.
3004 ********************************************************************/
3006 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
3011 /* you can get /usr/bin/backtrace from
3012 http://samba.org/ftp/unpacked/junkcode/backtrace */
3013 pstring cmd = "/usr/bin/backtrace %d";
3015 slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
3016 pstring_sub(cmd, "%d", pidstr);
3020 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
3021 fn = dlsym(h, "_Insure_trap_error");
3023 if (!h || h == _Insure_trap_error) {
3024 h = dlopen("/usr/local/parasoft/lib.linux2/libinsure.so", RTLD_LAZY);
3025 fn = dlsym(h, "_Insure_trap_error");
3029 ret = fn(a1, a2, a3, a4, a5, a6);
3037 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
3039 switch (share_access & ~FILE_SHARE_DELETE) {
3040 case FILE_SHARE_NONE:
3042 case FILE_SHARE_READ:
3044 case FILE_SHARE_WRITE:
3046 case FILE_SHARE_READ|FILE_SHARE_WRITE:
3049 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
3051 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
3058 pid_t procid_to_pid(const struct server_id *proc)
3063 static uint32 my_vnn = NONCLUSTER_VNN;
3065 void set_my_vnn(uint32 vnn)
3067 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3071 uint32 get_my_vnn(void)
3076 struct server_id pid_to_procid(pid_t pid)
3078 struct server_id result;
3080 #ifdef CLUSTER_SUPPORT
3081 result.vnn = my_vnn;
3086 struct server_id procid_self(void)
3088 return pid_to_procid(sys_getpid());
3091 struct server_id server_id_self(void)
3093 return procid_self();
3096 BOOL procid_equal(const struct server_id *p1, const struct server_id *p2)
3098 if (p1->pid != p2->pid)
3100 #ifdef CLUSTER_SUPPORT
3101 if (p1->vnn != p2->vnn)
3107 BOOL cluster_id_equal(const struct server_id *id1,
3108 const struct server_id *id2)
3110 return procid_equal(id1, id2);
3113 BOOL procid_is_me(const struct server_id *pid)
3115 if (pid->pid != sys_getpid())
3117 #ifdef CLUSTER_SUPPORT
3118 if (pid->vnn != my_vnn)
3124 struct server_id interpret_pid(const char *pid_string)
3126 #ifdef CLUSTER_SUPPORT
3127 unsigned int vnn, pid;
3128 struct server_id result;
3129 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3133 else if (sscanf(pid_string, "%u", &pid) == 1) {
3134 result.vnn = NONCLUSTER_VNN;
3138 result.vnn = NONCLUSTER_VNN;
3143 return pid_to_procid(atoi(pid_string));
3147 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3150 #ifdef CLUSTER_SUPPORT
3151 if (pid->vnn == NONCLUSTER_VNN) {
3152 fstr_sprintf(str, "%d", (int)pid->pid);
3155 fstr_sprintf(str, "%u:%d", (unsigned)pid->vnn, (int)pid->pid);
3158 fstr_sprintf(str, "%d", (int)pid->pid);
3160 return talloc_strdup(mem_ctx, str);
3163 char *procid_str_static(const struct server_id *pid)
3165 return procid_str(talloc_tos(), pid);
3168 BOOL procid_valid(const struct server_id *pid)
3170 return (pid->pid != -1);
3173 BOOL procid_is_local(const struct server_id *pid)
3175 #ifdef CLUSTER_SUPPORT
3176 return pid->vnn == my_vnn;
3182 int this_is_smp(void)
3184 #if defined(HAVE_SYSCONF)
3186 #if defined(SYSCONF_SC_NPROC_ONLN)
3187 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3188 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3189 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3199 /****************************************************************
3200 Check if an offset into a buffer is safe.
3201 If this returns True it's safe to indirect into the byte at
3203 ****************************************************************/
3205 BOOL is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3207 const char *end_base = buf_base + buf_len;
3208 char *end_ptr = ptr + off;
3210 if (!buf_base || !ptr) {
3214 if (end_base < buf_base || end_ptr < ptr) {
3215 return False; /* wrap. */
3218 if (end_ptr < end_base) {
3224 /****************************************************************
3225 Return a safe pointer into a buffer, or NULL.
3226 ****************************************************************/
3228 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3230 return is_offset_safe(buf_base, buf_len, ptr, off) ?
3234 /****************************************************************
3235 Return a safe pointer into a string within a buffer, or NULL.
3236 ****************************************************************/
3238 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3240 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3243 /* Check if a valid string exists at this offset. */
3244 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3250 /****************************************************************
3251 Return an SVAL at a pointer, or failval if beyond the end.
3252 ****************************************************************/
3254 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3257 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3260 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3263 return SVAL(ptr,off);
3266 /****************************************************************
3267 Return an IVAL at a pointer, or failval if beyond the end.
3268 ****************************************************************/
3270 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3273 * Note we use off+3 here, not off+4 as IVAL accesses
3274 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3276 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3279 return IVAL(ptr,off);
3284 Disable these now we have checked all code paths and ensured
3285 NULL returns on zero request. JRA.
3287 /****************************************************************
3288 talloc wrapper functions that guarentee a null pointer return
3290 ****************************************************************/
3292 #ifndef MAX_TALLOC_SIZE
3293 #define MAX_TALLOC_SIZE 0x10000000
3297 * talloc and zero memory.
3298 * - returns NULL if size is zero.
3301 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3309 p = talloc_named_const(ctx, size, name);
3312 memset(p, '\0', size);
3319 * memdup with a talloc.
3320 * - returns NULL if size is zero.
3323 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3331 newp = talloc_named_const(t, size, name);
3333 memcpy(newp, p, size);
3340 * alloc an array, checking for integer overflow in the array size.
3341 * - returns NULL if count or el_size are zero.
3344 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3346 if (count >= MAX_TALLOC_SIZE/el_size) {
3350 if (el_size == 0 || count == 0) {
3354 return talloc_named_const(ctx, el_size * count, name);
3358 * alloc an zero array, checking for integer overflow in the array size
3359 * - returns NULL if count or el_size are zero.
3362 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3364 if (count >= MAX_TALLOC_SIZE/el_size) {
3368 if (el_size == 0 || count == 0) {
3372 return _talloc_zero(ctx, el_size * count, name);
3376 * Talloc wrapper that returns NULL if size == 0.
3378 void *talloc_zeronull(const void *context, size_t size, const char *name)
3383 return talloc_named_const(context, size, name);