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)
459 static fstring attrstr;
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");
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 encrypted smb packet.
519 ********************************************************************/
521 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
523 _smb_setlen(buf,len);
527 SSVAL(buf,6,enc_ctx_num);
530 /*******************************************************************
531 Set the length and marker of an smb packet.
532 ********************************************************************/
534 void smb_setlen(const char *frombuf, char *buf, int len)
536 _smb_setlen(buf,len);
539 if (buf != frombuf) {
540 memcpy(buf+4, frombuf+4, 4);
550 /*******************************************************************
551 Setup the word count and byte count for a smb message.
552 ********************************************************************/
554 int set_message(const char *frombuf, char *buf,int num_words,int num_bytes,BOOL zero)
556 if (zero && (num_words || num_bytes)) {
557 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
559 SCVAL(buf,smb_wct,num_words);
560 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
561 smb_setlen(frombuf, buf,smb_size + num_words*2 + num_bytes - 4);
562 return (smb_size + num_words*2 + num_bytes);
565 /*******************************************************************
566 Setup only the byte count for a smb message.
567 ********************************************************************/
569 int set_message_bcc(const char *frombuf, char *buf,int num_bytes)
571 int num_words = CVAL(buf,smb_wct);
572 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
573 smb_setlen(frombuf, buf,smb_size + num_words*2 + num_bytes - 4);
574 return (smb_size + num_words*2 + num_bytes);
577 /*******************************************************************
578 Setup only the byte count for a smb message, using the end of the
580 ********************************************************************/
582 int set_message_end(const char *frombuf, void *outbuf,void *end_ptr)
584 return set_message_bcc(frombuf,
586 PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
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);
1264 /****************************************************************************
1265 Interpret a protocol description string, with a default.
1266 ****************************************************************************/
1268 int interpret_protocol(const char *str,int def)
1270 if (strequal(str,"NT1"))
1271 return(PROTOCOL_NT1);
1272 if (strequal(str,"LANMAN2"))
1273 return(PROTOCOL_LANMAN2);
1274 if (strequal(str,"LANMAN1"))
1275 return(PROTOCOL_LANMAN1);
1276 if (strequal(str,"CORE"))
1277 return(PROTOCOL_CORE);
1278 if (strequal(str,"COREPLUS"))
1279 return(PROTOCOL_COREPLUS);
1280 if (strequal(str,"CORE+"))
1281 return(PROTOCOL_COREPLUS);
1283 DEBUG(0,("Unrecognised protocol level %s\n",str));
1288 /****************************************************************************
1289 Return true if a string could be a pure IP address.
1290 ****************************************************************************/
1292 BOOL is_ipaddress(const char *str)
1294 BOOL pure_address = True;
1297 for (i=0; pure_address && str[i]; i++)
1298 if (!(isdigit((int)str[i]) || str[i] == '.'))
1299 pure_address = False;
1301 /* Check that a pure number is not misinterpreted as an IP */
1302 pure_address = pure_address && (strchr_m(str, '.') != NULL);
1304 return pure_address;
1307 /****************************************************************************
1308 Interpret an internet address or name into an IP address in 4 byte form.
1309 ****************************************************************************/
1311 uint32 interpret_addr(const char *str)
1316 if (strcmp(str,"0.0.0.0") == 0)
1318 if (strcmp(str,"255.255.255.255") == 0)
1321 /* if it's in the form of an IP address then get the lib to interpret it */
1322 if (is_ipaddress(str)) {
1323 res = inet_addr(str);
1325 /* otherwise assume it's a network name of some sort and use
1326 sys_gethostbyname */
1327 if ((hp = sys_gethostbyname(str)) == 0) {
1328 DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
1332 if(hp->h_addr == NULL) {
1333 DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
1336 putip((char *)&res,(char *)hp->h_addr);
1339 if (res == (uint32)-1)
1345 /*******************************************************************
1346 A convenient addition to interpret_addr().
1347 ******************************************************************/
1349 struct in_addr *interpret_addr2(const char *str)
1351 static struct in_addr ret;
1352 uint32 a = interpret_addr(str);
1357 /*******************************************************************
1358 Check if an IP is the 0.0.0.0.
1359 ******************************************************************/
1361 BOOL is_zero_ip(struct in_addr ip)
1364 putip((char *)&a,(char *)&ip);
1368 /*******************************************************************
1369 Set an IP to 0.0.0.0.
1370 ******************************************************************/
1372 void zero_ip(struct in_addr *ip)
1375 static struct in_addr ipzero;
1378 ipzero = *interpret_addr2("0.0.0.0");
1385 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1386 /******************************************************************
1387 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1388 Based on a fix from <Thomas.Hepper@icem.de>.
1389 *******************************************************************/
1391 static void strip_mount_options( pstring *str)
1395 while(*p && !isspace(*p))
1397 while(*p && isspace(*p))
1402 pstrcpy(tmp_str, p);
1403 pstrcpy(*str, tmp_str);
1408 /*******************************************************************
1409 Patch from jkf@soton.ac.uk
1410 Split Luke's automount_server into YP lookup and string splitter
1411 so can easily implement automount_path().
1412 As we may end up doing both, cache the last YP result.
1413 *******************************************************************/
1415 #ifdef WITH_NISPLUS_HOME
1416 char *automount_lookup(const char *user_name)
1418 static fstring last_key = "";
1419 static pstring last_value = "";
1421 char *nis_map = (char *)lp_nis_home_map_name();
1423 char buffer[NIS_MAXATTRVAL + 1];
1428 if (strcmp(user_name, last_key)) {
1429 slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
1430 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1432 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1433 if (result->status != NIS_SUCCESS) {
1434 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1435 fstrcpy(last_key, ""); pstrcpy(last_value, "");
1437 object = result->objects.objects_val;
1438 if (object->zo_data.zo_type == ENTRY_OBJ) {
1439 entry = &object->zo_data.objdata_u.en_data;
1440 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1441 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1443 pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1444 pstring_sub(last_value, "&", user_name);
1445 fstrcpy(last_key, user_name);
1449 nis_freeresult(result);
1452 strip_mount_options(&last_value);
1454 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
1457 #else /* WITH_NISPLUS_HOME */
1459 char *automount_lookup(const char *user_name)
1461 static fstring last_key = "";
1462 static pstring last_value = "";
1464 int nis_error; /* returned by yp all functions */
1465 char *nis_result; /* yp_match inits this */
1466 int nis_result_len; /* and set this */
1467 char *nis_domain; /* yp_get_default_domain inits this */
1468 char *nis_map = (char *)lp_nis_home_map_name();
1470 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1471 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1475 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1477 if (!strcmp(user_name, last_key)) {
1478 nis_result = last_value;
1479 nis_result_len = strlen(last_value);
1482 if ((nis_error = yp_match(nis_domain, nis_map, user_name, strlen(user_name),
1483 &nis_result, &nis_result_len)) == 0) {
1484 fstrcpy(last_key, user_name);
1485 pstrcpy(last_value, nis_result);
1486 strip_mount_options(&last_value);
1488 } else if(nis_error == YPERR_KEY) {
1490 /* If Key lookup fails user home server is not in nis_map
1491 use default information for server, and home directory */
1493 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1494 user_name, nis_map));
1495 DEBUG(3, ("using defaults for server and home directory\n"));
1497 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1498 yperr_string(nis_error), user_name, nis_map));
1502 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
1505 #endif /* WITH_NISPLUS_HOME */
1508 /*******************************************************************
1509 Are two IPs on the same subnet?
1510 ********************************************************************/
1512 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
1514 uint32 net1,net2,nmask;
1516 nmask = ntohl(mask.s_addr);
1517 net1 = ntohl(ip1.s_addr);
1518 net2 = ntohl(ip2.s_addr);
1520 return((net1 & nmask) == (net2 & nmask));
1524 /****************************************************************************
1525 Check if a process exists. Does this work on all unixes?
1526 ****************************************************************************/
1528 BOOL process_exists(const struct server_id pid)
1530 if (procid_is_me(&pid)) {
1534 if (procid_is_local(&pid)) {
1535 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1538 #ifdef CLUSTER_SUPPORT
1539 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1546 BOOL process_exists_by_pid(pid_t pid)
1548 /* Doing kill with a non-positive pid causes messages to be
1549 * sent to places we don't want. */
1550 SMB_ASSERT(pid > 0);
1551 return(kill(pid,0) == 0 || errno != ESRCH);
1554 /*******************************************************************
1555 Convert a uid into a user name.
1556 ********************************************************************/
1558 const char *uidtoname(uid_t uid)
1560 static fstring name;
1561 struct passwd *pass;
1563 pass = getpwuid_alloc(NULL, uid);
1565 fstrcpy(name, pass->pw_name);
1568 slprintf(name, sizeof(name) - 1, "%ld",(long int)uid);
1574 /*******************************************************************
1575 Convert a gid into a group name.
1576 ********************************************************************/
1578 char *gidtoname(gid_t gid)
1580 static fstring name;
1583 grp = getgrgid(gid);
1585 return(grp->gr_name);
1586 slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1590 /*******************************************************************
1591 Convert a user name into a uid.
1592 ********************************************************************/
1594 uid_t nametouid(const char *name)
1596 struct passwd *pass;
1600 pass = getpwnam_alloc(NULL, name);
1607 u = (uid_t)strtol(name, &p, 0);
1608 if ((p != name) && (*p == '\0'))
1614 /*******************************************************************
1615 Convert a name to a gid_t if possible. Return -1 if not a group.
1616 ********************************************************************/
1618 gid_t nametogid(const char *name)
1624 g = (gid_t)strtol(name, &p, 0);
1625 if ((p != name) && (*p == '\0'))
1628 grp = sys_getgrnam(name);
1630 return(grp->gr_gid);
1634 /*******************************************************************
1635 Something really nasty happened - panic !
1636 ********************************************************************/
1638 void smb_panic(const char *const why)
1646 if (global_clobber_region_function) {
1647 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1648 global_clobber_region_function,
1649 global_clobber_region_line));
1654 DEBUG(0,("PANIC (pid %llu): %s\n",
1655 (unsigned long long)sys_getpid(), why));
1658 cmd = lp_panic_action();
1660 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1661 result = system(cmd);
1664 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1667 DEBUG(0, ("smb_panic(): action returned status %d\n",
1668 WEXITSTATUS(result)));
1674 /*******************************************************************
1675 Print a backtrace of the stack to the debug log. This function
1676 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1677 exit shortly after calling it.
1678 ********************************************************************/
1680 #ifdef HAVE_LIBUNWIND_H
1681 #include <libunwind.h>
1684 #ifdef HAVE_EXECINFO_H
1685 #include <execinfo.h>
1688 #ifdef HAVE_LIBEXC_H
1692 void log_stack_trace(void)
1694 #ifdef HAVE_LIBUNWIND
1695 /* Try to use libunwind before any other technique since on ia64
1696 * libunwind correctly walks the stack in more circumstances than
1699 unw_cursor_t cursor;
1704 unw_word_t ip, sp, off;
1706 procname[sizeof(procname) - 1] = '\0';
1708 if (unw_getcontext(&uc) != 0) {
1709 goto libunwind_failed;
1712 if (unw_init_local(&cursor, &uc) != 0) {
1713 goto libunwind_failed;
1716 DEBUG(0, ("BACKTRACE:\n"));
1720 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1721 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1723 switch (unw_get_proc_name(&cursor,
1724 procname, sizeof(procname) - 1, &off) ) {
1728 /* Name truncated. */
1729 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1730 i, procname, (long long)off,
1731 (long long)ip, (long long) sp));
1734 /* case -UNW_ENOINFO: */
1735 /* case -UNW_EUNSPEC: */
1736 /* No symbol name found. */
1737 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1738 i, "<unknown symbol>",
1739 (long long)ip, (long long) sp));
1742 } while (unw_step(&cursor) > 0);
1747 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1749 #elif HAVE_BACKTRACE_SYMBOLS
1750 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1751 size_t backtrace_size;
1752 char **backtrace_strings;
1754 /* get the backtrace (stack frames) */
1755 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1756 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1758 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1759 (unsigned long)backtrace_size));
1761 if (backtrace_strings) {
1764 for (i = 0; i < backtrace_size; i++)
1765 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1767 /* Leak the backtrace_strings, rather than risk what free() might do */
1772 /* The IRIX libexc library provides an API for unwinding the stack. See
1773 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1774 * since we are about to abort anyway, it hardly matters.
1777 #define NAMESIZE 32 /* Arbitrary */
1779 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1780 char * names[BACKTRACE_STACK_SIZE];
1781 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1788 ZERO_ARRAY(namebuf);
1790 /* We need to be root so we can open our /proc entry to walk
1791 * our stack. It also helps when we want to dump core.
1795 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1796 names[i] = namebuf + (i * NAMESIZE);
1799 levels = trace_back_stack(0, addrs, names,
1800 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1802 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1803 for (i = 0; i < levels; i++) {
1804 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1809 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1813 /*******************************************************************
1814 A readdir wrapper which just returns the file name.
1815 ********************************************************************/
1817 const char *readdirname(SMB_STRUCT_DIR *p)
1819 SMB_STRUCT_DIRENT *ptr;
1825 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1829 dname = ptr->d_name;
1836 #ifdef HAVE_BROKEN_READDIR_NAME
1837 /* using /usr/ucb/cc is BAD */
1843 int len = NAMLEN(ptr);
1844 memcpy(buf, dname, len);
1852 /*******************************************************************
1853 Utility function used to decide if the last component
1854 of a path matches a (possibly wildcarded) entry in a namelist.
1855 ********************************************************************/
1857 BOOL is_in_path(const char *name, name_compare_entry *namelist, BOOL case_sensitive)
1859 pstring last_component;
1862 /* if we have no list it's obviously not in the path */
1863 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1867 DEBUG(8, ("is_in_path: %s\n", name));
1869 /* Get the last component of the unix name. */
1870 p = strrchr_m(name, '/');
1871 pstrcpy(last_component, p ? ++p : name);
1873 for(; namelist->name != NULL; namelist++) {
1874 if(namelist->is_wild) {
1875 if (mask_match(last_component, namelist->name, case_sensitive)) {
1876 DEBUG(8,("is_in_path: mask match succeeded\n"));
1880 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1881 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1882 DEBUG(8,("is_in_path: match succeeded\n"));
1887 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].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 *buf,int len)
2283 if (!DEBUGLVL(level)) return;
2285 DEBUGADD(level,("[%03X] ",i));
2287 DEBUGADD(level,("%02X ",(int)buf[i]));
2289 if (i%8 == 0) DEBUGADD(level,(" "));
2291 print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
2292 print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
2293 if (i<len) DEBUGADD(level,("[%03X] ",i));
2299 DEBUGADD(level,(" "));
2300 if (n>8) DEBUGADD(level,(" "));
2301 while (n--) DEBUGADD(level,(" "));
2303 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2305 if (n>0) print_asc(level,&buf[i-n],n);
2306 DEBUGADD(level,("\n"));
2310 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2312 #ifdef DEBUG_PASSWORD
2313 DEBUG(11, ("%s", msg));
2314 if (data != NULL && len > 0)
2316 dump_data(11, data, len);
2321 char *tab_depth(int depth)
2323 static pstring spaces;
2324 memset(spaces, ' ', depth * 4);
2325 spaces[depth * 4] = 0;
2329 /*****************************************************************************
2330 Provide a checksum on a string
2332 Input: s - the null-terminated character string for which the checksum
2335 Output: The checksum value calculated for s.
2336 *****************************************************************************/
2338 int str_checksum(const char *s)
2346 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2353 /*****************************************************************
2354 Zero a memory area then free it. Used to catch bugs faster.
2355 *****************************************************************/
2357 void zero_free(void *p, size_t size)
2363 /*****************************************************************
2364 Set our open file limit to a requested max and return the limit.
2365 *****************************************************************/
2367 int set_maxfiles(int requested_max)
2369 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2371 int saved_current_limit;
2373 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2374 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2377 return requested_max;
2381 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2382 * account for the extra fd we need
2383 * as well as the log files and standard
2384 * handles etc. Save the limit we want to set in case
2385 * we are running on an OS that doesn't support this limit (AIX)
2386 * which always returns RLIM_INFINITY for rlp.rlim_max.
2389 /* Try raising the hard (max) limit to the requested amount. */
2391 #if defined(RLIM_INFINITY)
2392 if (rlp.rlim_max != RLIM_INFINITY) {
2393 int orig_max = rlp.rlim_max;
2395 if ( rlp.rlim_max < requested_max )
2396 rlp.rlim_max = requested_max;
2398 /* This failing is not an error - many systems (Linux) don't
2399 support our default request of 10,000 open files. JRA. */
2401 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2402 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2403 (int)rlp.rlim_max, strerror(errno) ));
2405 /* Set failed - restore original value from get. */
2406 rlp.rlim_max = orig_max;
2411 /* Now try setting the soft (current) limit. */
2413 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2415 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2416 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2417 (int)rlp.rlim_cur, strerror(errno) ));
2419 return saved_current_limit;
2422 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2423 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2426 return saved_current_limit;
2429 #if defined(RLIM_INFINITY)
2430 if(rlp.rlim_cur == RLIM_INFINITY)
2431 return saved_current_limit;
2434 if((int)rlp.rlim_cur > saved_current_limit)
2435 return saved_current_limit;
2437 return rlp.rlim_cur;
2438 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2440 * No way to know - just guess...
2442 return requested_max;
2446 /*****************************************************************
2447 Possibly replace mkstemp if it is broken.
2448 *****************************************************************/
2450 int smb_mkstemp(char *name_template)
2452 #if HAVE_SECURE_MKSTEMP
2453 return mkstemp(name_template);
2455 /* have a reasonable go at emulating it. Hope that
2456 the system mktemp() isn't completly hopeless */
2457 char *p = mktemp(name_template);
2460 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2464 /*****************************************************************
2465 malloc that aborts with smb_panic on fail or zero size.
2466 *****************************************************************/
2468 void *smb_xmalloc_array(size_t size, unsigned int count)
2472 smb_panic("smb_xmalloc_array: called with zero size");
2474 if (count >= MAX_ALLOC_SIZE/size) {
2475 smb_panic("smb_xmalloc_array: alloc size too large");
2477 if ((p = SMB_MALLOC(size*count)) == NULL) {
2478 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2479 (unsigned long)size, (unsigned long)count));
2480 smb_panic("smb_xmalloc_array: malloc failed");
2486 Memdup with smb_panic on fail.
2489 void *smb_xmemdup(const void *p, size_t size)
2492 p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2493 memcpy(p2, p, size);
2498 strdup that aborts on malloc fail.
2501 char *smb_xstrdup(const char *s)
2503 #if defined(PARANOID_MALLOC_CHECKER)
2510 #define strdup rep_strdup
2513 char *s1 = strdup(s);
2514 #if defined(PARANOID_MALLOC_CHECKER)
2518 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2521 smb_panic("smb_xstrdup: malloc failed");
2528 strndup that aborts on malloc fail.
2531 char *smb_xstrndup(const char *s, size_t n)
2533 #if defined(PARANOID_MALLOC_CHECKER)
2539 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
2541 #define strndup rep_strndup
2544 char *s1 = strndup(s, n);
2545 #if defined(PARANOID_MALLOC_CHECKER)
2549 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2552 smb_panic("smb_xstrndup: malloc failed");
2558 vasprintf that aborts on malloc fail
2561 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2568 n = vasprintf(ptr, format, ap2);
2569 if (n == -1 || ! *ptr) {
2570 smb_panic("smb_xvasprintf: out of memory");
2575 /*****************************************************************
2576 Like strdup but for memory.
2577 *****************************************************************/
2579 void *memdup(const void *p, size_t size)
2584 p2 = SMB_MALLOC(size);
2587 memcpy(p2, p, size);
2591 /*****************************************************************
2592 Get local hostname and cache result.
2593 *****************************************************************/
2595 char *myhostname(void)
2603 /*****************************************************************
2604 A useful function for returning a path in the Samba lock directory.
2605 *****************************************************************/
2607 char *lock_path(const char *name)
2609 static pstring fname;
2611 pstrcpy(fname,lp_lockdir());
2612 trim_char(fname,'\0','/');
2614 if (!directory_exist(fname,NULL))
2618 pstrcat(fname,name);
2623 /*****************************************************************
2624 A useful function for returning a path in the Samba pid directory.
2625 *****************************************************************/
2627 char *pid_path(const char *name)
2629 static pstring fname;
2631 pstrcpy(fname,lp_piddir());
2632 trim_char(fname,'\0','/');
2634 if (!directory_exist(fname,NULL))
2638 pstrcat(fname,name);
2644 * @brief Returns an absolute path to a file in the Samba lib directory.
2646 * @param name File to find, relative to LIBDIR.
2648 * @retval Pointer to a static #pstring containing the full path.
2651 char *lib_path(const char *name)
2653 static pstring fname;
2654 fstr_sprintf(fname, "%s/%s", dyn_LIBDIR, name);
2659 * @brief Returns the platform specific shared library extension.
2661 * @retval Pointer to a static #fstring containing the extension.
2664 const char *shlib_ext(void)
2666 return dyn_SHLIBEXT;
2669 /*******************************************************************
2670 Given a filename - get its directory name
2671 NB: Returned in static storage. Caveats:
2672 o Not safe in thread environment.
2673 o Caller must not free.
2674 o If caller wishes to preserve, they should copy.
2675 ********************************************************************/
2677 char *parent_dirname(const char *path)
2679 static pstring dirpath;
2685 pstrcpy(dirpath, path);
2686 p = strrchr_m(dirpath, '/'); /* Find final '/', if any */
2688 pstrcpy(dirpath, "."); /* No final "/", so dir is "." */
2691 ++p; /* For root "/", leave "/" in place */
2697 BOOL parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2698 char **parent, const char **name)
2703 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2706 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2717 if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2720 memcpy(*parent, dir, len);
2721 (*parent)[len] = '\0';
2729 /*******************************************************************
2730 Determine if a pattern contains any Microsoft wildcard characters.
2731 *******************************************************************/
2733 BOOL ms_has_wild(const char *s)
2737 if (lp_posix_pathnames()) {
2738 /* With posix pathnames no characters are wild. */
2742 while ((c = *s++)) {
2755 BOOL ms_has_wild_w(const smb_ucs2_t *s)
2758 if (!s) return False;
2759 while ((c = *s++)) {
2761 case UCS2_CHAR('*'):
2762 case UCS2_CHAR('?'):
2763 case UCS2_CHAR('<'):
2764 case UCS2_CHAR('>'):
2765 case UCS2_CHAR('"'):
2772 /*******************************************************************
2773 A wrapper that handles case sensitivity and the special handling
2775 *******************************************************************/
2777 BOOL mask_match(const char *string, char *pattern, BOOL is_case_sensitive)
2779 if (strcmp(string,"..") == 0)
2781 if (strcmp(pattern,".") == 0)
2784 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2787 /*******************************************************************
2788 A wrapper that handles case sensitivity and the special handling
2789 of the ".." name. Varient that is only called by old search code which requires
2790 pattern translation.
2791 *******************************************************************/
2793 BOOL mask_match_search(const char *string, char *pattern, BOOL is_case_sensitive)
2795 if (strcmp(string,"..") == 0)
2797 if (strcmp(pattern,".") == 0)
2800 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2803 /*******************************************************************
2804 A wrapper that handles a list of patters and calls mask_match()
2805 on each. Returns True if any of the patterns match.
2806 *******************************************************************/
2808 BOOL mask_match_list(const char *string, char **list, int listLen, BOOL is_case_sensitive)
2810 while (listLen-- > 0) {
2811 if (mask_match(string, *list++, is_case_sensitive))
2817 /*********************************************************
2818 Recursive routine that is called by unix_wild_match.
2819 *********************************************************/
2821 static BOOL unix_do_match(const char *regexp, const char *str)
2825 for( p = regexp; *p && *str; ) {
2836 * Look for a character matching
2837 * the one after the '*'.
2841 return True; /* Automatic match */
2844 while(*str && (*p != *str))
2848 * Patch from weidel@multichart.de. In the case of the regexp
2849 * '*XX*' we want to ensure there are at least 2 'X' characters
2850 * in the string after the '*' for a match to be made.
2857 * Eat all the characters that match, but count how many there were.
2860 while(*str && (*p == *str)) {
2866 * Now check that if the regexp had n identical characters that
2867 * matchcount had at least that many matches.
2870 while ( *(p+1) && (*(p+1) == *p)) {
2875 if ( matchcount <= 0 )
2879 str--; /* We've eaten the match char after the '*' */
2881 if(unix_do_match(p, str))
2903 if (!*p && str[0] == '.' && str[1] == 0)
2906 if (!*str && *p == '?') {
2912 if(!*str && (*p == '*' && p[1] == '\0'))
2918 /*******************************************************************
2919 Simple case insensitive interface to a UNIX wildcard matcher.
2920 Returns True if match, False if not.
2921 *******************************************************************/
2923 BOOL unix_wild_match(const char *pattern, const char *string)
2928 pstrcpy(p2, pattern);
2929 pstrcpy(s2, string);
2933 /* Remove any *? and ** from the pattern as they are meaningless */
2934 for(p = p2; *p; p++)
2935 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
2936 pstrcpy( &p[1], &p[2]);
2938 if (strequal(p2,"*"))
2941 return unix_do_match(p2, s2);
2944 /**********************************************************************
2945 Converts a name to a fully qualified domain name.
2946 Returns True if lookup succeeded, False if not (then fqdn is set to name)
2947 ***********************************************************************/
2949 BOOL name_to_fqdn(fstring fqdn, const char *name)
2951 struct hostent *hp = sys_gethostbyname(name);
2953 if ( hp && hp->h_name && *hp->h_name ) {
2956 /* find out if the fqdn is returned as an alias
2957 * to cope with /etc/hosts files where the first
2958 * name is not the fqdn but the short name */
2959 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2961 for (i = 0; hp->h_aliases[i]; i++) {
2962 if (strchr_m(hp->h_aliases[i], '.')) {
2963 full = hp->h_aliases[i];
2968 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2969 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2970 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2971 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2972 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2980 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2981 fstrcpy(fqdn, full);
2984 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2985 fstrcpy(fqdn, name);
2990 /**********************************************************************
2991 Extension to talloc_get_type: Abort on type mismatch
2992 ***********************************************************************/
2994 void *talloc_check_name_abort(const void *ptr, const char *name)
2998 result = talloc_check_name(ptr, name);
3002 DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
3003 name, talloc_get_name(ptr)));
3004 smb_panic("talloc type mismatch");
3005 /* Keep the compiler happy */
3012 /*******************************************************************
3013 This routine is a trick to immediately catch errors when debugging
3014 with insure. A xterm with a gdb is popped up when insure catches
3015 a error. It is Linux specific.
3016 ********************************************************************/
3018 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
3023 /* you can get /usr/bin/backtrace from
3024 http://samba.org/ftp/unpacked/junkcode/backtrace */
3025 pstring cmd = "/usr/bin/backtrace %d";
3027 slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
3028 pstring_sub(cmd, "%d", pidstr);
3032 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
3033 fn = dlsym(h, "_Insure_trap_error");
3035 if (!h || h == _Insure_trap_error) {
3036 h = dlopen("/usr/local/parasoft/lib.linux2/libinsure.so", RTLD_LAZY);
3037 fn = dlsym(h, "_Insure_trap_error");
3041 ret = fn(a1, a2, a3, a4, a5, a6);
3049 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
3051 switch (share_access & ~FILE_SHARE_DELETE) {
3052 case FILE_SHARE_NONE:
3054 case FILE_SHARE_READ:
3056 case FILE_SHARE_WRITE:
3058 case FILE_SHARE_READ|FILE_SHARE_WRITE:
3061 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
3063 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
3070 pid_t procid_to_pid(const struct server_id *proc)
3075 static uint32 my_vnn = NONCLUSTER_VNN;
3077 void set_my_vnn(uint32 vnn)
3079 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3083 uint32 get_my_vnn(void)
3088 struct server_id pid_to_procid(pid_t pid)
3090 struct server_id result;
3092 #ifdef CLUSTER_SUPPORT
3093 result.vnn = my_vnn;
3098 struct server_id procid_self(void)
3100 return pid_to_procid(sys_getpid());
3103 struct server_id server_id_self(void)
3105 return procid_self();
3108 BOOL procid_equal(const struct server_id *p1, const struct server_id *p2)
3110 if (p1->pid != p2->pid)
3112 #ifdef CLUSTER_SUPPORT
3113 if (p1->vnn != p2->vnn)
3119 BOOL cluster_id_equal(const struct server_id *id1,
3120 const struct server_id *id2)
3122 return procid_equal(id1, id2);
3125 BOOL procid_is_me(const struct server_id *pid)
3127 if (pid->pid != sys_getpid())
3129 #ifdef CLUSTER_SUPPORT
3130 if (pid->vnn != my_vnn)
3136 struct server_id interpret_pid(const char *pid_string)
3138 #ifdef CLUSTER_SUPPORT
3139 unsigned int vnn, pid;
3140 struct server_id result;
3141 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3145 else if (sscanf(pid_string, "%u", &pid) == 1) {
3146 result.vnn = NONCLUSTER_VNN;
3150 result.vnn = NONCLUSTER_VNN;
3155 return pid_to_procid(atoi(pid_string));
3159 char *procid_str_static(const struct server_id *pid)
3162 #ifdef CLUSTER_SUPPORT
3163 if (pid->vnn == NONCLUSTER_VNN) {
3164 fstr_sprintf(str, "%d", (int)pid->pid);
3167 fstr_sprintf(str, "%u:%d", (unsigned)pid->vnn, (int)pid->pid);
3170 fstr_sprintf(str, "%d", (int)pid->pid);
3175 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3177 return talloc_strdup(mem_ctx, procid_str_static(pid));
3180 BOOL procid_valid(const struct server_id *pid)
3182 return (pid->pid != -1);
3185 BOOL procid_is_local(const struct server_id *pid)
3187 #ifdef CLUSTER_SUPPORT
3188 return pid->vnn == my_vnn;
3194 int this_is_smp(void)
3196 #if defined(HAVE_SYSCONF)
3198 #if defined(SYSCONF_SC_NPROC_ONLN)
3199 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3200 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3201 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3211 /****************************************************************
3212 Check if an offset into a buffer is safe.
3213 If this returns True it's safe to indirect into the byte at
3215 ****************************************************************/
3217 BOOL is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3219 const char *end_base = buf_base + buf_len;
3220 char *end_ptr = ptr + off;
3222 if (!buf_base || !ptr) {
3226 if (end_base < buf_base || end_ptr < ptr) {
3227 return False; /* wrap. */
3230 if (end_ptr < end_base) {
3236 /****************************************************************
3237 Return a safe pointer into a buffer, or NULL.
3238 ****************************************************************/
3240 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3242 return is_offset_safe(buf_base, buf_len, ptr, off) ?
3246 /****************************************************************
3247 Return a safe pointer into a string within a buffer, or NULL.
3248 ****************************************************************/
3250 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3252 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3255 /* Check if a valid string exists at this offset. */
3256 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3262 /****************************************************************
3263 Return an SVAL at a pointer, or failval if beyond the end.
3264 ****************************************************************/
3266 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3269 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3272 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3275 return SVAL(ptr,off);
3278 /****************************************************************
3279 Return an IVAL at a pointer, or failval if beyond the end.
3280 ****************************************************************/
3282 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3285 * Note we use off+3 here, not off+4 as IVAL accesses
3286 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3288 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3291 return IVAL(ptr,off);
3294 /****************************************************************
3295 talloc wrapper functions that guarentee a null pointer return
3297 ****************************************************************/
3299 #ifndef MAX_TALLOC_SIZE
3300 #define MAX_TALLOC_SIZE 0x10000000
3304 * talloc and zero memory.
3305 * - returns NULL if size is zero.
3308 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3316 p = talloc_named_const(ctx, size, name);
3319 memset(p, '\0', size);
3326 * memdup with a talloc.
3327 * - returns NULL if size is zero.
3330 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3338 newp = talloc_named_const(t, size, name);
3340 memcpy(newp, p, size);
3347 * alloc an array, checking for integer overflow in the array size.
3348 * - returns NULL if count or el_size are zero.
3351 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3353 if (count >= MAX_TALLOC_SIZE/el_size) {
3357 if (el_size == 0 || count == 0) {
3361 return talloc_named_const(ctx, el_size * count, name);
3365 * alloc an zero array, checking for integer overflow in the array size
3366 * - returns NULL if count or el_size are zero.
3369 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3371 if (count >= MAX_TALLOC_SIZE/el_size) {
3375 if (el_size == 0 || count == 0) {
3379 return _talloc_zero(ctx, el_size * count, name);
3383 * Talloc wrapper that returns NULL if size == 0.
3385 void *talloc_zeronull(const void *context, size_t size, const char *name)
3390 return talloc_named_const(context, size, name);