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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 extern fstring local_machine;
28 extern char *global_clobber_region_function;
29 extern unsigned int global_clobber_region_line;
30 extern fstring remote_arch;
32 /* Max allowable allococation - 256mb - 0x10000000 */
33 #define MAX_ALLOC_SIZE (1024*1024*256)
35 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
36 #ifdef WITH_NISPLUS_HOME
37 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
39 * The following lines are needed due to buggy include files
40 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
41 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
42 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
43 * an enum in /usr/include/rpcsvc/nis.h.
50 #if defined(GROUP_OBJ)
54 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
56 #include <rpcsvc/nis.h>
58 #endif /* WITH_NISPLUS_HOME */
59 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
61 enum protocol_types Protocol = PROTOCOL_COREPLUS;
63 /* a default finfo structure to ensure all fields are sensible */
66 /* this is used by the chaining code */
71 static enum remote_arch_types ra_type = RA_UNKNOWN;
72 pstring user_socket_options=DEFAULT_SOCKET_OPTIONS;
74 /***********************************************************************
75 Definitions for all names.
76 ***********************************************************************/
78 static char *smb_myname;
79 static char *smb_myworkgroup;
80 static char *smb_scope;
81 static int smb_num_netbios_names;
82 static char **smb_my_netbios_names;
84 /***********************************************************************
85 Allocate and set myname. Ensure upper case.
86 ***********************************************************************/
88 BOOL set_global_myname(const char *myname)
90 SAFE_FREE(smb_myname);
91 smb_myname = SMB_STRDUP(myname);
94 strupper_m(smb_myname);
98 const char *global_myname(void)
103 /***********************************************************************
104 Allocate and set myworkgroup. Ensure upper case.
105 ***********************************************************************/
107 BOOL set_global_myworkgroup(const char *myworkgroup)
109 SAFE_FREE(smb_myworkgroup);
110 smb_myworkgroup = SMB_STRDUP(myworkgroup);
111 if (!smb_myworkgroup)
113 strupper_m(smb_myworkgroup);
117 const char *lp_workgroup(void)
119 return smb_myworkgroup;
122 /***********************************************************************
123 Allocate and set scope. Ensure upper case.
124 ***********************************************************************/
126 BOOL set_global_scope(const char *scope)
128 SAFE_FREE(smb_scope);
129 smb_scope = SMB_STRDUP(scope);
132 strupper_m(smb_scope);
136 /*********************************************************************
137 Ensure scope is never null string.
138 *********************************************************************/
140 const char *global_scope(void)
143 set_global_scope("");
147 static void free_netbios_names_array(void)
151 for (i = 0; i < smb_num_netbios_names; i++)
152 SAFE_FREE(smb_my_netbios_names[i]);
154 SAFE_FREE(smb_my_netbios_names);
155 smb_num_netbios_names = 0;
158 static BOOL allocate_my_netbios_names_array(size_t number)
160 free_netbios_names_array();
162 smb_num_netbios_names = number + 1;
163 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
165 if (!smb_my_netbios_names)
168 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
172 static BOOL set_my_netbios_names(const char *name, int i)
174 SAFE_FREE(smb_my_netbios_names[i]);
176 smb_my_netbios_names[i] = SMB_STRDUP(name);
177 if (!smb_my_netbios_names[i])
179 strupper_m(smb_my_netbios_names[i]);
183 /***********************************************************************
184 Free memory allocated to global objects
185 ***********************************************************************/
187 void gfree_names(void)
189 SAFE_FREE( smb_myname );
190 SAFE_FREE( smb_myworkgroup );
191 SAFE_FREE( smb_scope );
192 free_netbios_names_array();
195 void gfree_all( void )
204 /* release the talloc null_context memory last */
205 talloc_disable_null_tracking();
208 const char *my_netbios_names(int i)
210 return smb_my_netbios_names[i];
213 BOOL set_netbios_aliases(const char **str_array)
217 /* Work out the max number of netbios aliases that we have */
218 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
221 if ( global_myname() && *global_myname())
224 /* Allocate space for the netbios aliases */
225 if (!allocate_my_netbios_names_array(namecount))
228 /* Use the global_myname string first */
230 if ( global_myname() && *global_myname()) {
231 set_my_netbios_names( global_myname(), namecount );
237 for ( i = 0; str_array[i] != NULL; i++) {
239 BOOL duplicate = False;
241 /* Look for duplicates */
242 for( n=0; n<namecount; n++ ) {
243 if( strequal( str_array[i], my_netbios_names(n) ) ) {
249 if (!set_my_netbios_names(str_array[i], namecount))
258 /****************************************************************************
259 Common name initialization code.
260 ****************************************************************************/
262 BOOL init_names(void)
267 if (global_myname() == NULL || *global_myname() == '\0') {
268 if (!set_global_myname(myhostname())) {
269 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
274 if (!set_netbios_aliases(lp_netbios_aliases())) {
275 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
279 fstrcpy( local_machine, global_myname() );
280 trim_char( local_machine, ' ', ' ' );
281 p = strchr( local_machine, ' ' );
284 strlower_m( local_machine );
286 DEBUG( 5, ("Netbios name list:-\n") );
287 for( n=0; my_netbios_names(n); n++ )
288 DEBUGADD( 5, ( "my_netbios_names[%d]=\"%s\"\n", n, my_netbios_names(n) ) );
293 /**************************************************************************n
294 Find a suitable temporary directory. The result should be copied immediately
295 as it may be overwritten by a subsequent call.
296 ****************************************************************************/
298 const char *tmpdir(void)
301 if ((p = getenv("TMPDIR")))
306 /****************************************************************************
307 Add a gid to an array of gids if it's not already there.
308 ****************************************************************************/
310 BOOL add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
311 gid_t **gids, size_t *num_gids)
315 if ((*num_gids != 0) && (*gids == NULL)) {
317 * A former call to this routine has failed to allocate memory
322 for (i=0; i<*num_gids; i++) {
323 if ((*gids)[i] == gid) {
328 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
334 (*gids)[*num_gids] = gid;
339 /****************************************************************************
340 Like atoi but gets the value up to the separator character.
341 ****************************************************************************/
343 static const char *Atoic(const char *p, int *n, const char *c)
345 if (!isdigit((int)*p)) {
346 DEBUG(5, ("Atoic: malformed number\n"));
352 while ((*p) && isdigit((int)*p))
355 if (strchr_m(c, *p) == NULL) {
356 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
363 /*************************************************************************
364 Reads a list of numbers.
365 *************************************************************************/
367 const char *get_numlist(const char *p, uint32 **num, int *count)
371 if (num == NULL || count == NULL)
377 while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
378 *num = SMB_REALLOC_ARRAY((*num), uint32, (*count)+1);
382 (*num)[(*count)] = val;
390 /*******************************************************************
391 Check if a file exists - call vfs_file_exist for samba files.
392 ********************************************************************/
394 BOOL file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
400 if (sys_stat(fname,sbuf) != 0)
403 return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
406 /*******************************************************************
407 Check a files mod time.
408 ********************************************************************/
410 time_t file_modtime(const char *fname)
414 if (sys_stat(fname,&st) != 0)
420 /*******************************************************************
421 Check if a directory exists.
422 ********************************************************************/
424 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
432 if (sys_stat(dname,st) != 0)
435 ret = S_ISDIR(st->st_mode);
441 /*******************************************************************
442 Returns the size in bytes of the named file.
443 ********************************************************************/
445 SMB_OFF_T get_file_size(char *file_name)
449 if(sys_stat(file_name,&buf) != 0)
450 return (SMB_OFF_T)-1;
454 /*******************************************************************
455 Return a string representing an attribute for a file.
456 ********************************************************************/
458 char *attrib_string(uint16 mode)
460 static fstring attrstr;
464 if (mode & aVOLID) fstrcat(attrstr,"V");
465 if (mode & aDIR) fstrcat(attrstr,"D");
466 if (mode & aARCH) fstrcat(attrstr,"A");
467 if (mode & aHIDDEN) fstrcat(attrstr,"H");
468 if (mode & aSYSTEM) fstrcat(attrstr,"S");
469 if (mode & aRONLY) fstrcat(attrstr,"R");
474 /*******************************************************************
475 Show a smb message structure.
476 ********************************************************************/
478 void show_msg(char *buf)
486 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
488 (int)CVAL(buf,smb_com),
489 (int)CVAL(buf,smb_rcls),
490 (int)CVAL(buf,smb_reh),
491 (int)SVAL(buf,smb_err),
492 (int)CVAL(buf,smb_flg),
493 (int)SVAL(buf,smb_flg2)));
494 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
495 (int)SVAL(buf,smb_tid),
496 (int)SVAL(buf,smb_pid),
497 (int)SVAL(buf,smb_uid),
498 (int)SVAL(buf,smb_mid)));
499 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
501 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
502 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
503 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
505 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
507 DEBUGADD(5,("smb_bcc=%d\n",bcc));
515 dump_data(10, (uint8 *)smb_buf(buf), bcc);
518 /*******************************************************************
519 Set the length and marker of an encrypted smb packet.
520 ********************************************************************/
522 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
524 _smb_setlen(buf,len);
528 SSVAL(buf,6,enc_ctx_num);
531 /*******************************************************************
532 Set the length and marker of an smb packet.
533 ********************************************************************/
535 void smb_setlen(const char *frombuf, char *buf, int len)
537 _smb_setlen(buf,len);
540 if (buf != frombuf) {
541 memcpy(buf+4, frombuf+4, 4);
551 /*******************************************************************
552 Setup the word count and byte count for a smb message.
553 ********************************************************************/
555 int set_message(const char *frombuf, char *buf,int num_words,int num_bytes,BOOL zero)
557 if (zero && (num_words || num_bytes)) {
558 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
560 SCVAL(buf,smb_wct,num_words);
561 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
562 smb_setlen(frombuf, buf,smb_size + num_words*2 + num_bytes - 4);
563 return (smb_size + num_words*2 + num_bytes);
566 /*******************************************************************
567 Setup only the byte count for a smb message.
568 ********************************************************************/
570 int set_message_bcc(const char *frombuf, char *buf,int num_bytes)
572 int num_words = CVAL(buf,smb_wct);
573 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
574 smb_setlen(frombuf, buf,smb_size + num_words*2 + num_bytes - 4);
575 return (smb_size + num_words*2 + num_bytes);
578 /*******************************************************************
579 Setup only the byte count for a smb message, using the end of the
581 ********************************************************************/
583 int set_message_end(const char *frombuf, void *outbuf,void *end_ptr)
585 return set_message_bcc(frombuf,
587 PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
590 /*******************************************************************
591 Reduce a file name, removing .. elements.
592 ********************************************************************/
594 void dos_clean_name(char *s)
598 DEBUG(3,("dos_clean_name [%s]\n",s));
600 /* remove any double slashes */
601 all_string_sub(s, "\\\\", "\\", 0);
603 /* Remove leading .\\ characters */
604 if(strncmp(s, ".\\", 2) == 0) {
605 trim_string(s, ".\\", NULL);
610 while ((p = strstr_m(s,"\\..\\")) != NULL) {
616 if ((p=strrchr_m(s,'\\')) != NULL)
623 trim_string(s,NULL,"\\..");
624 all_string_sub(s, "\\.\\", "\\", 0);
627 /*******************************************************************
628 Reduce a file name, removing .. elements.
629 ********************************************************************/
631 void unix_clean_name(char *s)
635 DEBUG(3,("unix_clean_name [%s]\n",s));
637 /* remove any double slashes */
638 all_string_sub(s, "//","/", 0);
640 /* Remove leading ./ characters */
641 if(strncmp(s, "./", 2) == 0) {
642 trim_string(s, "./", NULL);
647 while ((p = strstr_m(s,"/../")) != NULL) {
653 if ((p=strrchr_m(s,'/')) != NULL)
660 trim_string(s,NULL,"/..");
661 all_string_sub(s, "/./", "/", 0);
664 void clean_name(char *s)
670 /*******************************************************************
671 Close the low 3 fd's and open dev/null in their place.
672 ********************************************************************/
674 void close_low_fds(BOOL stderr_too)
686 /* try and use up these file descriptors, so silly
687 library routines writing to stdout etc won't cause havoc */
689 if (i == 2 && !stderr_too)
692 fd = sys_open("/dev/null",O_RDWR,0);
694 fd = sys_open("/dev/null",O_WRONLY,0);
696 DEBUG(0,("Can't open /dev/null\n"));
700 DEBUG(0,("Didn't get file descriptor %d\n",i));
707 /*******************************************************************
708 Write data into an fd at a given offset. Ignore seek errors.
709 ********************************************************************/
711 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
716 if (pos == (SMB_OFF_T)-1) {
717 return write_data(fd, buffer, N);
719 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
721 ret = sys_pwrite(fd,buffer + total,N - total, pos);
722 if (ret == -1 && errno == ESPIPE) {
723 return write_data(fd, buffer + total,N - total);
726 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
735 return (ssize_t)total;
737 /* Use lseek and write_data. */
738 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
739 if (errno != ESPIPE) {
743 return write_data(fd, buffer, N);
747 /****************************************************************************
748 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
752 ****************************************************************************/
754 int set_blocking(int fd, BOOL set)
758 #define FLAG_TO_SET O_NONBLOCK
761 #define FLAG_TO_SET O_NDELAY
763 #define FLAG_TO_SET FNDELAY
767 if((val = sys_fcntl_long(fd, F_GETFL, 0)) == -1)
769 if(set) /* Turn blocking on - ie. clear nonblock flag */
773 return sys_fcntl_long( fd, F_SETFL, val);
777 /****************************************************************************
778 Transfer some data between two fd's.
779 ****************************************************************************/
781 #ifndef TRANSFER_BUF_SIZE
782 #define TRANSFER_BUF_SIZE 65536
785 ssize_t transfer_file_internal(int infd, int outfd, size_t n, ssize_t (*read_fn)(int, void *, size_t),
786 ssize_t (*write_fn)(int, const void *, size_t))
792 size_t num_to_read_thistime;
793 size_t num_written = 0;
795 if ((buf = SMB_MALLOC_ARRAY(char, TRANSFER_BUF_SIZE)) == NULL)
799 num_to_read_thistime = MIN((n - total), TRANSFER_BUF_SIZE);
801 read_ret = (*read_fn)(infd, buf, num_to_read_thistime);
802 if (read_ret == -1) {
803 DEBUG(0,("transfer_file_internal: read failure. Error = %s\n", strerror(errno) ));
812 while (num_written < read_ret) {
813 write_ret = (*write_fn)(outfd,buf + num_written, read_ret - num_written);
815 if (write_ret == -1) {
816 DEBUG(0,("transfer_file_internal: write failure. Error = %s\n", strerror(errno) ));
821 return (ssize_t)total;
823 num_written += (size_t)write_ret;
826 total += (size_t)read_ret;
830 return (ssize_t)total;
833 SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n)
835 return (SMB_OFF_T)transfer_file_internal(infd, outfd, (size_t)n, sys_read, sys_write);
838 /*******************************************************************
839 Sleep for a specified number of milliseconds.
840 ********************************************************************/
842 void smb_msleep(unsigned int t)
844 #if defined(HAVE_NANOSLEEP)
845 struct timespec tval;
848 tval.tv_sec = t/1000;
849 tval.tv_nsec = 1000000*(t%1000);
853 ret = nanosleep(&tval, &tval);
854 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
856 unsigned int tdiff=0;
857 struct timeval tval,t1,t2;
864 tval.tv_sec = (t-tdiff)/1000;
865 tval.tv_usec = 1000*((t-tdiff)%1000);
867 /* Never wait for more than 1 sec. */
868 if (tval.tv_sec > 1) {
875 sys_select_intr(0,&fds,NULL,NULL,&tval);
878 if (t2.tv_sec < t1.tv_sec) {
879 /* Someone adjusted time... */
883 tdiff = TvalDiff(&t1,&t2);
888 /****************************************************************************
889 Become a daemon, discarding the controlling terminal.
890 ****************************************************************************/
892 void become_daemon(BOOL Fork, BOOL no_process_group)
900 /* detach from the terminal */
902 if (!no_process_group) setsid();
903 #elif defined(TIOCNOTTY)
904 if (!no_process_group) {
905 int i = sys_open("/dev/tty", O_RDWR, 0);
907 ioctl(i, (int) TIOCNOTTY, (char *)0);
911 #endif /* HAVE_SETSID */
913 /* Close fd's 0,1,2. Needed if started by rsh */
914 close_low_fds(False); /* Don't close stderr, let the debug system
915 attach it to the logfile */
918 /****************************************************************************
919 Put up a yes/no prompt.
920 ****************************************************************************/
927 if (!fgets(ans,sizeof(ans)-1,stdin))
930 if (*ans == 'y' || *ans == 'Y')
936 #if defined(PARANOID_MALLOC_CHECKER)
938 /****************************************************************************
939 Internal malloc wrapper. Externally visible.
940 ****************************************************************************/
942 void *malloc_(size_t size)
949 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
952 /****************************************************************************
953 Internal calloc wrapper. Not externally visible.
954 ****************************************************************************/
956 static void *calloc_(size_t count, size_t size)
958 if (size == 0 || count == 0) {
962 return calloc(count, size);
963 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
966 /****************************************************************************
967 Internal realloc wrapper. Not externally visible.
968 ****************************************************************************/
970 static void *realloc_(void *ptr, size_t size)
973 return realloc(ptr, size);
974 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
977 #endif /* PARANOID_MALLOC_CHECKER */
979 /****************************************************************************
981 ****************************************************************************/
983 void *malloc_array(size_t el_size, unsigned int count)
985 if (count >= MAX_ALLOC_SIZE/el_size) {
989 if (el_size == 0 || count == 0) {
992 #if defined(PARANOID_MALLOC_CHECKER)
993 return malloc_(el_size*count);
995 return malloc(el_size*count);
999 /****************************************************************************
1001 ****************************************************************************/
1003 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1005 if (count >= MAX_ALLOC_SIZE/el_size) {
1009 return sys_memalign(align, el_size*count);
1012 /****************************************************************************
1014 ****************************************************************************/
1016 void *calloc_array(size_t size, size_t nmemb)
1018 if (nmemb >= MAX_ALLOC_SIZE/size) {
1021 if (size == 0 || nmemb == 0) {
1024 #if defined(PARANOID_MALLOC_CHECKER)
1025 return calloc_(nmemb, size);
1027 return calloc(nmemb, size);
1031 /****************************************************************************
1032 Expand a pointer to be a particular size.
1033 Note that this version of Realloc has an extra parameter that decides
1034 whether to free the passed in storage on allocation failure or if the
1037 This is designed for use in the typical idiom of :
1039 p = SMB_REALLOC(p, size)
1044 and not to have to keep track of the old 'p' contents to free later, nor
1045 to worry if the size parameter was zero. In the case where NULL is returned
1046 we guarentee that p has been freed.
1048 If free later semantics are desired, then pass 'free_old_on_error' as False which
1049 guarentees that the old contents are not freed on error, even if size == 0. To use
1052 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1060 Changes were instigated by Coverity error checking. JRA.
1061 ****************************************************************************/
1063 void *Realloc(void *p, size_t size, BOOL free_old_on_error)
1068 if (free_old_on_error) {
1071 DEBUG(2,("Realloc asked for 0 bytes\n"));
1075 #if defined(PARANOID_MALLOC_CHECKER)
1077 ret = (void *)malloc_(size);
1079 ret = (void *)realloc_(p,size);
1083 ret = (void *)malloc(size);
1085 ret = (void *)realloc(p,size);
1090 if (free_old_on_error && p) {
1093 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1099 /****************************************************************************
1101 ****************************************************************************/
1103 void *realloc_array(void *p, size_t el_size, unsigned int count, BOOL free_old_on_error)
1105 if (count >= MAX_ALLOC_SIZE/el_size) {
1106 if (free_old_on_error) {
1111 return Realloc(p, el_size*count, free_old_on_error);
1114 /****************************************************************************
1115 (Hopefully) efficient array append.
1116 ****************************************************************************/
1118 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1119 void *element, void *_array, uint32 *num_elements,
1120 ssize_t *array_size)
1122 void **array = (void **)_array;
1124 if (*array_size < 0) {
1128 if (*array == NULL) {
1129 if (*array_size == 0) {
1133 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1137 *array = TALLOC(mem_ctx, element_size * (*array_size));
1138 if (*array == NULL) {
1143 if (*num_elements == *array_size) {
1146 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1150 *array = TALLOC_REALLOC(mem_ctx, *array,
1151 element_size * (*array_size));
1153 if (*array == NULL) {
1158 memcpy((char *)(*array) + element_size*(*num_elements),
1159 element, element_size);
1169 /****************************************************************************
1170 Free memory, checks for NULL.
1171 Use directly SAFE_FREE()
1172 Exists only because we need to pass a function pointer somewhere --SSS
1173 ****************************************************************************/
1175 void safe_free(void *p)
1180 /****************************************************************************
1181 Get my own name and IP.
1182 ****************************************************************************/
1184 BOOL get_myname(char *my_name)
1190 /* get my host name */
1191 if (gethostname(hostname, sizeof(hostname)) == -1) {
1192 DEBUG(0,("gethostname failed\n"));
1196 /* Ensure null termination. */
1197 hostname[sizeof(hostname)-1] = '\0';
1200 /* split off any parts after an initial . */
1201 char *p = strchr_m(hostname,'.');
1206 fstrcpy(my_name,hostname);
1212 /****************************************************************************
1213 Get my own canonical name, including domain.
1214 ****************************************************************************/
1216 BOOL get_mydnsfullname(fstring my_dnsname)
1218 static fstring dnshostname;
1221 if (!*dnshostname) {
1222 /* get my host name */
1223 if (gethostname(dnshostname, sizeof(dnshostname)) == -1) {
1224 *dnshostname = '\0';
1225 DEBUG(0,("gethostname failed\n"));
1229 /* Ensure null termination. */
1230 dnshostname[sizeof(dnshostname)-1] = '\0';
1232 /* Ensure we get the cannonical name. */
1233 if (!(hp = sys_gethostbyname(dnshostname))) {
1234 *dnshostname = '\0';
1237 fstrcpy(dnshostname, hp->h_name);
1239 fstrcpy(my_dnsname, dnshostname);
1243 /****************************************************************************
1244 Get my own domain name.
1245 ****************************************************************************/
1247 BOOL get_mydnsdomname(fstring my_domname)
1253 if (!get_mydnsfullname(domname)) {
1256 p = strchr_m(domname, '.');
1259 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 static fstring name;
1562 struct passwd *pass;
1564 pass = getpwuid_alloc(NULL, uid);
1566 fstrcpy(name, pass->pw_name);
1569 slprintf(name, sizeof(name) - 1, "%ld",(long int)uid);
1575 /*******************************************************************
1576 Convert a gid into a group name.
1577 ********************************************************************/
1579 char *gidtoname(gid_t gid)
1581 static fstring name;
1584 grp = getgrgid(gid);
1586 return(grp->gr_name);
1587 slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1591 /*******************************************************************
1592 Convert a user name into a uid.
1593 ********************************************************************/
1595 uid_t nametouid(const char *name)
1597 struct passwd *pass;
1601 pass = getpwnam_alloc(NULL, name);
1608 u = (uid_t)strtol(name, &p, 0);
1609 if ((p != name) && (*p == '\0'))
1615 /*******************************************************************
1616 Convert a name to a gid_t if possible. Return -1 if not a group.
1617 ********************************************************************/
1619 gid_t nametogid(const char *name)
1625 g = (gid_t)strtol(name, &p, 0);
1626 if ((p != name) && (*p == '\0'))
1629 grp = sys_getgrnam(name);
1631 return(grp->gr_gid);
1635 /*******************************************************************
1636 Something really nasty happened - panic !
1637 ********************************************************************/
1639 void smb_panic(const char *const why)
1647 if (global_clobber_region_function) {
1648 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1649 global_clobber_region_function,
1650 global_clobber_region_line));
1655 DEBUG(0,("PANIC (pid %llu): %s\n",
1656 (unsigned long long)sys_getpid(), why));
1659 cmd = lp_panic_action();
1661 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1662 result = system(cmd);
1665 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1668 DEBUG(0, ("smb_panic(): action returned status %d\n",
1669 WEXITSTATUS(result)));
1675 /*******************************************************************
1676 Print a backtrace of the stack to the debug log. This function
1677 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1678 exit shortly after calling it.
1679 ********************************************************************/
1681 #ifdef HAVE_LIBUNWIND_H
1682 #include <libunwind.h>
1685 #ifdef HAVE_EXECINFO_H
1686 #include <execinfo.h>
1689 #ifdef HAVE_LIBEXC_H
1693 void log_stack_trace(void)
1695 #ifdef HAVE_LIBUNWIND
1696 /* Try to use libunwind before any other technique since on ia64
1697 * libunwind correctly walks the stack in more circumstances than
1700 unw_cursor_t cursor;
1705 unw_word_t ip, sp, off;
1707 procname[sizeof(procname) - 1] = '\0';
1709 if (unw_getcontext(&uc) != 0) {
1710 goto libunwind_failed;
1713 if (unw_init_local(&cursor, &uc) != 0) {
1714 goto libunwind_failed;
1717 DEBUG(0, ("BACKTRACE:\n"));
1721 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1722 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1724 switch (unw_get_proc_name(&cursor,
1725 procname, sizeof(procname) - 1, &off) ) {
1729 /* Name truncated. */
1730 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1731 i, procname, (long long)off,
1732 (long long)ip, (long long) sp));
1735 /* case -UNW_ENOINFO: */
1736 /* case -UNW_EUNSPEC: */
1737 /* No symbol name found. */
1738 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1739 i, "<unknown symbol>",
1740 (long long)ip, (long long) sp));
1743 } while (unw_step(&cursor) > 0);
1748 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1750 #elif HAVE_BACKTRACE_SYMBOLS
1751 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1752 size_t backtrace_size;
1753 char **backtrace_strings;
1755 /* get the backtrace (stack frames) */
1756 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1757 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1759 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1760 (unsigned long)backtrace_size));
1762 if (backtrace_strings) {
1765 for (i = 0; i < backtrace_size; i++)
1766 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1768 /* Leak the backtrace_strings, rather than risk what free() might do */
1773 /* The IRIX libexc library provides an API for unwinding the stack. See
1774 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1775 * since we are about to abort anyway, it hardly matters.
1778 #define NAMESIZE 32 /* Arbitrary */
1780 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1781 char * names[BACKTRACE_STACK_SIZE];
1782 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1789 ZERO_ARRAY(namebuf);
1791 /* We need to be root so we can open our /proc entry to walk
1792 * our stack. It also helps when we want to dump core.
1796 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1797 names[i] = namebuf + (i * NAMESIZE);
1800 levels = trace_back_stack(0, addrs, names,
1801 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1803 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1804 for (i = 0; i < levels; i++) {
1805 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1810 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1814 /*******************************************************************
1815 A readdir wrapper which just returns the file name.
1816 ********************************************************************/
1818 const char *readdirname(SMB_STRUCT_DIR *p)
1820 SMB_STRUCT_DIRENT *ptr;
1826 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1830 dname = ptr->d_name;
1837 #ifdef HAVE_BROKEN_READDIR_NAME
1838 /* using /usr/ucb/cc is BAD */
1844 int len = NAMLEN(ptr);
1845 memcpy(buf, dname, len);
1853 /*******************************************************************
1854 Utility function used to decide if the last component
1855 of a path matches a (possibly wildcarded) entry in a namelist.
1856 ********************************************************************/
1858 BOOL is_in_path(const char *name, name_compare_entry *namelist, BOOL case_sensitive)
1860 pstring last_component;
1863 /* if we have no list it's obviously not in the path */
1864 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1868 DEBUG(8, ("is_in_path: %s\n", name));
1870 /* Get the last component of the unix name. */
1871 p = strrchr_m(name, '/');
1872 pstrcpy(last_component, p ? ++p : name);
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"));
1893 /*******************************************************************
1894 Strip a '/' separated list into an array of
1895 name_compare_enties structures suitable for
1896 passing to is_in_path(). We do this for
1897 speed so we can pre-parse all the names in the list
1898 and don't do it for each call to is_in_path().
1899 namelist is modified here and is assumed to be
1900 a copy owned by the caller.
1901 We also check if the entry contains a wildcard to
1902 remove a potentially expensive call to mask_match
1904 ********************************************************************/
1906 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1909 char *nameptr = namelist;
1910 int num_entries = 0;
1913 (*ppname_array) = NULL;
1915 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1918 /* We need to make two passes over the string. The
1919 first to count the number of elements, the second
1924 if ( *nameptr == '/' ) {
1925 /* cope with multiple (useless) /s) */
1929 /* find the next / */
1930 name_end = strchr_m(nameptr, '/');
1932 /* oops - the last check for a / didn't find one. */
1933 if (name_end == NULL)
1936 /* next segment please */
1937 nameptr = name_end + 1;
1941 if(num_entries == 0)
1944 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1945 DEBUG(0,("set_namearray: malloc fail\n"));
1949 /* Now copy out the names */
1953 if ( *nameptr == '/' ) {
1954 /* cope with multiple (useless) /s) */
1958 /* find the next / */
1959 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1962 /* oops - the last check for a / didn't find one. */
1963 if(name_end == NULL)
1966 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1967 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1968 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1972 /* next segment please */
1973 nameptr = name_end + 1;
1977 (*ppname_array)[i].name = NULL;
1982 /****************************************************************************
1983 Routine to free a namearray.
1984 ****************************************************************************/
1986 void free_namearray(name_compare_entry *name_array)
1990 if(name_array == NULL)
1993 for(i=0; name_array[i].name!=NULL; i++)
1994 SAFE_FREE(name_array[i].name);
1995 SAFE_FREE(name_array);
1999 #define DBGC_CLASS DBGC_LOCKING
2001 /****************************************************************************
2002 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
2003 is dealt with in posix.c
2004 Returns True if the lock was granted, False otherwise.
2005 ****************************************************************************/
2007 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
2009 SMB_STRUCT_FLOCK lock;
2012 DEBUG(8,("fcntl_lock fd=%d op=%d offset=%.0f count=%.0f type=%d\n",
2013 fd,op,(double)offset,(double)count,type));
2016 lock.l_whence = SEEK_SET;
2017 lock.l_start = offset;
2021 ret = sys_fcntl_ptr(fd,op,&lock);
2025 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
2026 (double)offset,(double)count,op,type,strerror(errno)));
2031 /* everything went OK */
2032 DEBUG(8,("fcntl_lock: Lock call successful\n"));
2037 /****************************************************************************
2038 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
2039 is dealt with in posix.c
2040 Returns True if we have information regarding this lock region (and returns
2041 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
2042 ****************************************************************************/
2044 BOOL fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
2046 SMB_STRUCT_FLOCK lock;
2049 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
2050 fd,(double)*poffset,(double)*pcount,*ptype));
2052 lock.l_type = *ptype;
2053 lock.l_whence = SEEK_SET;
2054 lock.l_start = *poffset;
2055 lock.l_len = *pcount;
2058 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
2062 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
2063 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
2068 *ptype = lock.l_type;
2069 *poffset = lock.l_start;
2070 *pcount = lock.l_len;
2073 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
2074 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
2079 #define DBGC_CLASS DBGC_ALL
2081 /*******************************************************************
2082 Is the name specified one of my netbios names.
2083 Returns true if it is equal, false otherwise.
2084 ********************************************************************/
2086 BOOL is_myname(const char *s)
2091 for (n=0; my_netbios_names(n); n++) {
2092 if (strequal(my_netbios_names(n), s)) {
2097 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
2101 BOOL is_myname_or_ipaddr(const char *s)
2103 fstring name, dnsname;
2109 /* santize the string from '\\name' */
2113 servername = strrchr_m( name, '\\' );
2119 /* optimize for the common case */
2121 if (strequal(servername, global_myname()))
2124 /* check for an alias */
2126 if (is_myname(servername))
2129 /* check for loopback */
2131 if (strequal(servername, "127.0.0.1"))
2134 if (strequal(servername, "localhost"))
2137 /* maybe it's my dns name */
2139 if ( get_mydnsfullname( dnsname ) )
2140 if ( strequal( servername, dnsname ) )
2143 /* handle possible CNAME records */
2145 if ( !is_ipaddress( servername ) ) {
2146 /* use DNS to resolve the name, but only the first address */
2149 if (((hp = sys_gethostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
2150 struct in_addr return_ip;
2151 putip( (char*)&return_ip, (char*)hp->h_addr );
2152 fstrcpy( name, inet_ntoa( return_ip ) );
2157 /* maybe its an IP address? */
2158 if (is_ipaddress(servername)) {
2159 struct iface_struct nics[MAX_INTERFACES];
2163 ip = interpret_addr(servername);
2164 if ((ip==0) || (ip==0xffffffff))
2167 n = get_interfaces(nics, MAX_INTERFACES);
2168 for (i=0; i<n; i++) {
2169 if (ip == nics[i].ip.s_addr)
2178 /*******************************************************************
2179 Is the name specified our workgroup/domain.
2180 Returns true if it is equal, false otherwise.
2181 ********************************************************************/
2183 BOOL is_myworkgroup(const char *s)
2187 if (strequal(s, lp_workgroup())) {
2191 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
2195 /*******************************************************************
2196 we distinguish between 2K and XP by the "Native Lan Manager" string
2197 WinXP => "Windows 2002 5.1"
2198 WinXP 64bit => "Windows XP 5.2"
2199 Win2k => "Windows 2000 5.0"
2200 NT4 => "Windows NT 4.0"
2201 Win9x => "Windows 4.0"
2202 Windows 2003 doesn't set the native lan manager string but
2203 they do set the domain to "Windows 2003 5.2" (probably a bug).
2204 ********************************************************************/
2206 void ra_lanman_string( const char *native_lanman )
2208 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
2209 set_remote_arch( RA_WINXP );
2210 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
2211 set_remote_arch( RA_WINXP );
2212 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
2213 set_remote_arch( RA_WIN2K3 );
2216 /*******************************************************************
2217 Set the horrid remote_arch string based on an enum.
2218 ********************************************************************/
2220 void set_remote_arch(enum remote_arch_types type)
2225 fstrcpy(remote_arch, "WfWg");
2228 fstrcpy(remote_arch, "OS2");
2231 fstrcpy(remote_arch, "Win95");
2234 fstrcpy(remote_arch, "WinNT");
2237 fstrcpy(remote_arch, "Win2K");
2240 fstrcpy(remote_arch, "WinXP");
2243 fstrcpy(remote_arch, "Win2K3");
2246 fstrcpy(remote_arch, "Vista");
2249 fstrcpy(remote_arch,"Samba");
2252 fstrcpy(remote_arch,"CIFSFS");
2255 ra_type = RA_UNKNOWN;
2256 fstrcpy(remote_arch, "UNKNOWN");
2260 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n", remote_arch));
2263 /*******************************************************************
2264 Get the remote_arch type.
2265 ********************************************************************/
2267 enum remote_arch_types get_remote_arch(void)
2272 void print_asc(int level, const unsigned char *buf,int len)
2276 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
2279 void dump_data(int level, const unsigned char *buf,int len)
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)
2610 static pstring fname;
2612 pstrcpy(fname,lp_lockdir());
2613 trim_char(fname,'\0','/');
2615 if (!directory_exist(fname,NULL))
2619 pstrcat(fname,name);
2624 /*****************************************************************
2625 A useful function for returning a path in the Samba pid directory.
2626 *****************************************************************/
2628 char *pid_path(const char *name)
2630 static pstring fname;
2632 pstrcpy(fname,lp_piddir());
2633 trim_char(fname,'\0','/');
2635 if (!directory_exist(fname,NULL))
2639 pstrcat(fname,name);
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 static pstring fname;
2655 fstr_sprintf(fname, "%s/%s", dyn_LIBDIR, name);
2660 * @brief Returns the platform specific shared library extension.
2662 * @retval Pointer to a static #fstring containing the extension.
2665 const char *shlib_ext(void)
2667 return dyn_SHLIBEXT;
2670 /*******************************************************************
2671 Given a filename - get its directory name
2672 NB: Returned in static storage. Caveats:
2673 o Not safe in thread environment.
2674 o Caller must not free.
2675 o If caller wishes to preserve, they should copy.
2676 ********************************************************************/
2678 char *parent_dirname(const char *path)
2680 static pstring dirpath;
2686 pstrcpy(dirpath, path);
2687 p = strrchr_m(dirpath, '/'); /* Find final '/', if any */
2689 pstrcpy(dirpath, "."); /* No final "/", so dir is "." */
2692 ++p; /* For root "/", leave "/" in place */
2698 BOOL parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2699 char **parent, const char **name)
2704 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2707 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2718 if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2721 memcpy(*parent, dir, len);
2722 (*parent)[len] = '\0';
2730 /*******************************************************************
2731 Determine if a pattern contains any Microsoft wildcard characters.
2732 *******************************************************************/
2734 BOOL ms_has_wild(const char *s)
2738 if (lp_posix_pathnames()) {
2739 /* With posix pathnames no characters are wild. */
2743 while ((c = *s++)) {
2756 BOOL ms_has_wild_w(const smb_ucs2_t *s)
2759 if (!s) return False;
2760 while ((c = *s++)) {
2762 case UCS2_CHAR('*'):
2763 case UCS2_CHAR('?'):
2764 case UCS2_CHAR('<'):
2765 case UCS2_CHAR('>'):
2766 case UCS2_CHAR('"'):
2773 /*******************************************************************
2774 A wrapper that handles case sensitivity and the special handling
2776 *******************************************************************/
2778 BOOL mask_match(const char *string, char *pattern, BOOL is_case_sensitive)
2780 if (strcmp(string,"..") == 0)
2782 if (strcmp(pattern,".") == 0)
2785 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2788 /*******************************************************************
2789 A wrapper that handles case sensitivity and the special handling
2790 of the ".." name. Varient that is only called by old search code which requires
2791 pattern translation.
2792 *******************************************************************/
2794 BOOL mask_match_search(const char *string, char *pattern, BOOL is_case_sensitive)
2796 if (strcmp(string,"..") == 0)
2798 if (strcmp(pattern,".") == 0)
2801 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2804 /*******************************************************************
2805 A wrapper that handles a list of patters and calls mask_match()
2806 on each. Returns True if any of the patterns match.
2807 *******************************************************************/
2809 BOOL mask_match_list(const char *string, char **list, int listLen, BOOL is_case_sensitive)
2811 while (listLen-- > 0) {
2812 if (mask_match(string, *list++, is_case_sensitive))
2818 /*********************************************************
2819 Recursive routine that is called by unix_wild_match.
2820 *********************************************************/
2822 static BOOL unix_do_match(const char *regexp, const char *str)
2826 for( p = regexp; *p && *str; ) {
2837 * Look for a character matching
2838 * the one after the '*'.
2842 return True; /* Automatic match */
2845 while(*str && (*p != *str))
2849 * Patch from weidel@multichart.de. In the case of the regexp
2850 * '*XX*' we want to ensure there are at least 2 'X' characters
2851 * in the string after the '*' for a match to be made.
2858 * Eat all the characters that match, but count how many there were.
2861 while(*str && (*p == *str)) {
2867 * Now check that if the regexp had n identical characters that
2868 * matchcount had at least that many matches.
2871 while ( *(p+1) && (*(p+1) == *p)) {
2876 if ( matchcount <= 0 )
2880 str--; /* We've eaten the match char after the '*' */
2882 if(unix_do_match(p, str))
2904 if (!*p && str[0] == '.' && str[1] == 0)
2907 if (!*str && *p == '?') {
2913 if(!*str && (*p == '*' && p[1] == '\0'))
2919 /*******************************************************************
2920 Simple case insensitive interface to a UNIX wildcard matcher.
2921 Returns True if match, False if not.
2922 *******************************************************************/
2924 BOOL unix_wild_match(const char *pattern, const char *string)
2929 pstrcpy(p2, pattern);
2930 pstrcpy(s2, string);
2934 /* Remove any *? and ** from the pattern as they are meaningless */
2935 for(p = p2; *p; p++)
2936 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
2937 pstrcpy( &p[1], &p[2]);
2939 if (strequal(p2,"*"))
2942 return unix_do_match(p2, s2);
2945 /**********************************************************************
2946 Converts a name to a fully qualified domain name.
2947 Returns True if lookup succeeded, False if not (then fqdn is set to name)
2948 ***********************************************************************/
2950 BOOL name_to_fqdn(fstring fqdn, const char *name)
2952 struct hostent *hp = sys_gethostbyname(name);
2954 if ( hp && hp->h_name && *hp->h_name ) {
2957 /* find out if the fqdn is returned as an alias
2958 * to cope with /etc/hosts files where the first
2959 * name is not the fqdn but the short name */
2960 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2962 for (i = 0; hp->h_aliases[i]; i++) {
2963 if (strchr_m(hp->h_aliases[i], '.')) {
2964 full = hp->h_aliases[i];
2969 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2970 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2971 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2972 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2973 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2981 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2982 fstrcpy(fqdn, full);
2985 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2986 fstrcpy(fqdn, name);
2991 /**********************************************************************
2992 Extension to talloc_get_type: Abort on type mismatch
2993 ***********************************************************************/
2995 void *talloc_check_name_abort(const void *ptr, const char *name)
2999 result = talloc_check_name(ptr, name);
3003 DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
3004 name, talloc_get_name(ptr)));
3005 smb_panic("talloc type mismatch");
3006 /* Keep the compiler happy */
3013 /*******************************************************************
3014 This routine is a trick to immediately catch errors when debugging
3015 with insure. A xterm with a gdb is popped up when insure catches
3016 a error. It is Linux specific.
3017 ********************************************************************/
3019 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
3024 /* you can get /usr/bin/backtrace from
3025 http://samba.org/ftp/unpacked/junkcode/backtrace */
3026 pstring cmd = "/usr/bin/backtrace %d";
3028 slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
3029 pstring_sub(cmd, "%d", pidstr);
3033 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
3034 fn = dlsym(h, "_Insure_trap_error");
3036 if (!h || h == _Insure_trap_error) {
3037 h = dlopen("/usr/local/parasoft/lib.linux2/libinsure.so", RTLD_LAZY);
3038 fn = dlsym(h, "_Insure_trap_error");
3042 ret = fn(a1, a2, a3, a4, a5, a6);
3050 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
3052 switch (share_access & ~FILE_SHARE_DELETE) {
3053 case FILE_SHARE_NONE:
3055 case FILE_SHARE_READ:
3057 case FILE_SHARE_WRITE:
3059 case FILE_SHARE_READ|FILE_SHARE_WRITE:
3062 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
3064 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
3071 pid_t procid_to_pid(const struct server_id *proc)
3076 static uint32 my_vnn = NONCLUSTER_VNN;
3078 void set_my_vnn(uint32 vnn)
3080 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3084 uint32 get_my_vnn(void)
3089 struct server_id pid_to_procid(pid_t pid)
3091 struct server_id result;
3093 #ifdef CLUSTER_SUPPORT
3094 result.vnn = my_vnn;
3099 struct server_id procid_self(void)
3101 return pid_to_procid(sys_getpid());
3104 struct server_id server_id_self(void)
3106 return procid_self();
3109 BOOL procid_equal(const struct server_id *p1, const struct server_id *p2)
3111 if (p1->pid != p2->pid)
3113 #ifdef CLUSTER_SUPPORT
3114 if (p1->vnn != p2->vnn)
3120 BOOL cluster_id_equal(const struct server_id *id1,
3121 const struct server_id *id2)
3123 return procid_equal(id1, id2);
3126 BOOL procid_is_me(const struct server_id *pid)
3128 if (pid->pid != sys_getpid())
3130 #ifdef CLUSTER_SUPPORT
3131 if (pid->vnn != my_vnn)
3137 struct server_id interpret_pid(const char *pid_string)
3139 #ifdef CLUSTER_SUPPORT
3140 unsigned int vnn, pid;
3141 struct server_id result;
3142 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3147 result.vnn = NONCLUSTER_VNN;
3152 return pid_to_procid(atoi(pid_string));
3156 char *procid_str_static(const struct server_id *pid)
3159 #ifdef CLUSTER_SUPPORT
3160 if (pid->vnn == NONCLUSTER_VNN) {
3161 fstr_sprintf(str, "%d", (int)pid->pid);
3164 fstr_sprintf(str, "%u:%d", (unsigned)pid->vnn, (int)pid->pid);
3167 fstr_sprintf(str, "%d", (int)pid->pid);
3172 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3174 return talloc_strdup(mem_ctx, procid_str_static(pid));
3177 BOOL procid_valid(const struct server_id *pid)
3179 return (pid->pid != -1);
3182 BOOL procid_is_local(const struct server_id *pid)
3184 #ifdef CLUSTER_SUPPORT
3185 return pid->vnn == my_vnn;
3191 int this_is_smp(void)
3193 #if defined(HAVE_SYSCONF)
3195 #if defined(SYSCONF_SC_NPROC_ONLN)
3196 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3197 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3198 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3208 /****************************************************************
3209 Check if an offset into a buffer is safe.
3210 If this returns True it's safe to indirect into the byte at
3212 ****************************************************************/
3214 BOOL is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3216 const char *end_base = buf_base + buf_len;
3217 char *end_ptr = ptr + off;
3219 if (!buf_base || !ptr) {
3223 if (end_base < buf_base || end_ptr < ptr) {
3224 return False; /* wrap. */
3227 if (end_ptr < end_base) {
3233 /****************************************************************
3234 Return a safe pointer into a buffer, or NULL.
3235 ****************************************************************/
3237 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3239 return is_offset_safe(buf_base, buf_len, ptr, off) ?
3243 /****************************************************************
3244 Return a safe pointer into a string within a buffer, or NULL.
3245 ****************************************************************/
3247 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3249 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3252 /* Check if a valid string exists at this offset. */
3253 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3259 /****************************************************************
3260 Return an SVAL at a pointer, or failval if beyond the end.
3261 ****************************************************************/
3263 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3266 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3269 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3272 return SVAL(ptr,off);
3275 /****************************************************************
3276 Return an IVAL at a pointer, or failval if beyond the end.
3277 ****************************************************************/
3279 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3282 * Note we use off+3 here, not off+4 as IVAL accesses
3283 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3285 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3288 return IVAL(ptr,off);
3291 /****************************************************************
3292 talloc wrapper functions that guarentee a null pointer return
3294 ****************************************************************/
3296 #ifndef MAX_TALLOC_SIZE
3297 #define MAX_TALLOC_SIZE 0x10000000
3301 * talloc and zero memory.
3302 * - returns NULL if size is zero.
3305 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3313 p = talloc_named_const(ctx, size, name);
3316 memset(p, '\0', size);
3323 * memdup with a talloc.
3324 * - returns NULL if size is zero.
3327 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3335 newp = talloc_named_const(t, size, name);
3337 memcpy(newp, p, size);
3344 * alloc an array, checking for integer overflow in the array size.
3345 * - returns NULL if count or el_size are zero.
3348 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3350 if (count >= MAX_TALLOC_SIZE/el_size) {
3354 if (el_size == 0 || count == 0) {
3358 return talloc_named_const(ctx, el_size * count, name);
3362 * alloc an zero array, checking for integer overflow in the array size
3363 * - returns NULL if count or el_size are zero.
3366 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3368 if (count >= MAX_TALLOC_SIZE/el_size) {
3372 if (el_size == 0 || count == 0) {
3376 return _talloc_zero(ctx, el_size * count, name);
3380 * Talloc wrapper that returns NULL if size == 0.
3382 void *talloc_zeronull(const void *context, size_t size, const char *name)
3387 return talloc_named_const(context, size, name);