2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2002
6 Copyright (C) Simo Sorce 2001
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8 Copyright (C) James Peach 2006
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 extern fstring local_machine;
27 extern char *global_clobber_region_function;
28 extern unsigned int global_clobber_region_line;
29 extern fstring remote_arch;
31 /* Max allowable allococation - 256mb - 0x10000000 */
32 #define MAX_ALLOC_SIZE (1024*1024*256)
34 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
35 #ifdef WITH_NISPLUS_HOME
36 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
38 * The following lines are needed due to buggy include files
39 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
40 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
41 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
42 * an enum in /usr/include/rpcsvc/nis.h.
49 #if defined(GROUP_OBJ)
53 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
55 #include <rpcsvc/nis.h>
57 #endif /* WITH_NISPLUS_HOME */
58 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
60 enum protocol_types Protocol = PROTOCOL_COREPLUS;
62 /* a default finfo structure to ensure all fields are sensible */
65 /* this is used by the chaining code */
70 static enum remote_arch_types ra_type = RA_UNKNOWN;
71 pstring user_socket_options=DEFAULT_SOCKET_OPTIONS;
73 /***********************************************************************
74 Definitions for all names.
75 ***********************************************************************/
77 static char *smb_myname;
78 static char *smb_myworkgroup;
79 static char *smb_scope;
80 static int smb_num_netbios_names;
81 static char **smb_my_netbios_names;
83 /***********************************************************************
84 Allocate and set myname. Ensure upper case.
85 ***********************************************************************/
87 BOOL set_global_myname(const char *myname)
89 SAFE_FREE(smb_myname);
90 smb_myname = SMB_STRDUP(myname);
93 strupper_m(smb_myname);
97 const char *global_myname(void)
102 /***********************************************************************
103 Allocate and set myworkgroup. Ensure upper case.
104 ***********************************************************************/
106 BOOL set_global_myworkgroup(const char *myworkgroup)
108 SAFE_FREE(smb_myworkgroup);
109 smb_myworkgroup = SMB_STRDUP(myworkgroup);
110 if (!smb_myworkgroup)
112 strupper_m(smb_myworkgroup);
116 const char *lp_workgroup(void)
118 return smb_myworkgroup;
121 /***********************************************************************
122 Allocate and set scope. Ensure upper case.
123 ***********************************************************************/
125 BOOL set_global_scope(const char *scope)
127 SAFE_FREE(smb_scope);
128 smb_scope = SMB_STRDUP(scope);
131 strupper_m(smb_scope);
135 /*********************************************************************
136 Ensure scope is never null string.
137 *********************************************************************/
139 const char *global_scope(void)
142 set_global_scope("");
146 static void free_netbios_names_array(void)
150 for (i = 0; i < smb_num_netbios_names; i++)
151 SAFE_FREE(smb_my_netbios_names[i]);
153 SAFE_FREE(smb_my_netbios_names);
154 smb_num_netbios_names = 0;
157 static BOOL allocate_my_netbios_names_array(size_t number)
159 free_netbios_names_array();
161 smb_num_netbios_names = number + 1;
162 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
164 if (!smb_my_netbios_names)
167 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
171 static BOOL set_my_netbios_names(const char *name, int i)
173 SAFE_FREE(smb_my_netbios_names[i]);
175 smb_my_netbios_names[i] = SMB_STRDUP(name);
176 if (!smb_my_netbios_names[i])
178 strupper_m(smb_my_netbios_names[i]);
182 /***********************************************************************
183 Free memory allocated to global objects
184 ***********************************************************************/
186 void gfree_names(void)
188 SAFE_FREE( smb_myname );
189 SAFE_FREE( smb_myworkgroup );
190 SAFE_FREE( smb_scope );
191 free_netbios_names_array();
194 void gfree_all( void )
203 /* release the talloc null_context memory last */
204 talloc_disable_null_tracking();
207 const char *my_netbios_names(int i)
209 return smb_my_netbios_names[i];
212 BOOL set_netbios_aliases(const char **str_array)
216 /* Work out the max number of netbios aliases that we have */
217 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
220 if ( global_myname() && *global_myname())
223 /* Allocate space for the netbios aliases */
224 if (!allocate_my_netbios_names_array(namecount))
227 /* Use the global_myname string first */
229 if ( global_myname() && *global_myname()) {
230 set_my_netbios_names( global_myname(), namecount );
236 for ( i = 0; str_array[i] != NULL; i++) {
238 BOOL duplicate = False;
240 /* Look for duplicates */
241 for( n=0; n<namecount; n++ ) {
242 if( strequal( str_array[i], my_netbios_names(n) ) ) {
248 if (!set_my_netbios_names(str_array[i], namecount))
257 /****************************************************************************
258 Common name initialization code.
259 ****************************************************************************/
261 BOOL init_names(void)
266 if (global_myname() == NULL || *global_myname() == '\0') {
267 if (!set_global_myname(myhostname())) {
268 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
273 if (!set_netbios_aliases(lp_netbios_aliases())) {
274 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
278 fstrcpy( local_machine, global_myname() );
279 trim_char( local_machine, ' ', ' ' );
280 p = strchr( local_machine, ' ' );
283 strlower_m( local_machine );
285 DEBUG( 5, ("Netbios name list:-\n") );
286 for( n=0; my_netbios_names(n); n++ )
287 DEBUGADD( 5, ( "my_netbios_names[%d]=\"%s\"\n", n, my_netbios_names(n) ) );
292 /**************************************************************************n
293 Find a suitable temporary directory. The result should be copied immediately
294 as it may be overwritten by a subsequent call.
295 ****************************************************************************/
297 const char *tmpdir(void)
300 if ((p = getenv("TMPDIR")))
305 /****************************************************************************
306 Add a gid to an array of gids if it's not already there.
307 ****************************************************************************/
309 BOOL add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
310 gid_t **gids, size_t *num_gids)
314 if ((*num_gids != 0) && (*gids == NULL)) {
316 * A former call to this routine has failed to allocate memory
321 for (i=0; i<*num_gids; i++) {
322 if ((*gids)[i] == gid) {
327 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
333 (*gids)[*num_gids] = gid;
338 /****************************************************************************
339 Like atoi but gets the value up to the separator character.
340 ****************************************************************************/
342 static const char *Atoic(const char *p, int *n, const char *c)
344 if (!isdigit((int)*p)) {
345 DEBUG(5, ("Atoic: malformed number\n"));
351 while ((*p) && isdigit((int)*p))
354 if (strchr_m(c, *p) == NULL) {
355 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
362 /*************************************************************************
363 Reads a list of numbers.
364 *************************************************************************/
366 const char *get_numlist(const char *p, uint32 **num, int *count)
370 if (num == NULL || count == NULL)
376 while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
377 *num = SMB_REALLOC_ARRAY((*num), uint32, (*count)+1);
381 (*num)[(*count)] = val;
389 /*******************************************************************
390 Check if a file exists - call vfs_file_exist for samba files.
391 ********************************************************************/
393 BOOL file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
399 if (sys_stat(fname,sbuf) != 0)
402 return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
405 /*******************************************************************
406 Check a files mod time.
407 ********************************************************************/
409 time_t file_modtime(const char *fname)
413 if (sys_stat(fname,&st) != 0)
419 /*******************************************************************
420 Check if a directory exists.
421 ********************************************************************/
423 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
431 if (sys_stat(dname,st) != 0)
434 ret = S_ISDIR(st->st_mode);
440 /*******************************************************************
441 Returns the size in bytes of the named file.
442 ********************************************************************/
444 SMB_OFF_T get_file_size(char *file_name)
448 if(sys_stat(file_name,&buf) != 0)
449 return (SMB_OFF_T)-1;
453 /*******************************************************************
454 Return a string representing an attribute for a file.
455 ********************************************************************/
457 char *attrib_string(uint16 mode)
463 if (mode & aVOLID) fstrcat(attrstr,"V");
464 if (mode & aDIR) fstrcat(attrstr,"D");
465 if (mode & aARCH) fstrcat(attrstr,"A");
466 if (mode & aHIDDEN) fstrcat(attrstr,"H");
467 if (mode & aSYSTEM) fstrcat(attrstr,"S");
468 if (mode & aRONLY) fstrcat(attrstr,"R");
470 return talloc_strdup(talloc_tos(), attrstr);
473 /*******************************************************************
474 Show a smb message structure.
475 ********************************************************************/
477 void show_msg(char *buf)
485 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
487 (int)CVAL(buf,smb_com),
488 (int)CVAL(buf,smb_rcls),
489 (int)CVAL(buf,smb_reh),
490 (int)SVAL(buf,smb_err),
491 (int)CVAL(buf,smb_flg),
492 (int)SVAL(buf,smb_flg2)));
493 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
494 (int)SVAL(buf,smb_tid),
495 (int)SVAL(buf,smb_pid),
496 (int)SVAL(buf,smb_uid),
497 (int)SVAL(buf,smb_mid)));
498 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
500 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
501 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
502 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
504 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
506 DEBUGADD(5,("smb_bcc=%d\n",bcc));
514 dump_data(10, (uint8 *)smb_buf(buf), bcc);
517 /*******************************************************************
518 Set the length and marker of an 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 Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
591 Return the bytes added
592 ********************************************************************/
594 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
596 size_t newlen = smb_len(*outbuf) + 4 + blob.length;
599 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
600 DEBUG(0, ("talloc failed\n"));
605 memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
606 set_message_bcc(NULL, (char *)tmp, smb_buflen(tmp) + blob.length);
610 /*******************************************************************
611 Reduce a file name, removing .. elements.
612 ********************************************************************/
614 void dos_clean_name(char *s)
618 DEBUG(3,("dos_clean_name [%s]\n",s));
620 /* remove any double slashes */
621 all_string_sub(s, "\\\\", "\\", 0);
623 /* Remove leading .\\ characters */
624 if(strncmp(s, ".\\", 2) == 0) {
625 trim_string(s, ".\\", NULL);
630 while ((p = strstr_m(s,"\\..\\")) != NULL) {
636 if ((p=strrchr_m(s,'\\')) != NULL)
643 trim_string(s,NULL,"\\..");
644 all_string_sub(s, "\\.\\", "\\", 0);
647 /*******************************************************************
648 Reduce a file name, removing .. elements.
649 ********************************************************************/
651 void unix_clean_name(char *s)
655 DEBUG(3,("unix_clean_name [%s]\n",s));
657 /* remove any double slashes */
658 all_string_sub(s, "//","/", 0);
660 /* Remove leading ./ characters */
661 if(strncmp(s, "./", 2) == 0) {
662 trim_string(s, "./", NULL);
667 while ((p = strstr_m(s,"/../")) != NULL) {
673 if ((p=strrchr_m(s,'/')) != NULL)
680 trim_string(s,NULL,"/..");
681 all_string_sub(s, "/./", "/", 0);
684 void clean_name(char *s)
690 /*******************************************************************
691 Close the low 3 fd's and open dev/null in their place.
692 ********************************************************************/
694 void close_low_fds(BOOL stderr_too)
706 /* try and use up these file descriptors, so silly
707 library routines writing to stdout etc won't cause havoc */
709 if (i == 2 && !stderr_too)
712 fd = sys_open("/dev/null",O_RDWR,0);
714 fd = sys_open("/dev/null",O_WRONLY,0);
716 DEBUG(0,("Can't open /dev/null\n"));
720 DEBUG(0,("Didn't get file descriptor %d\n",i));
727 /*******************************************************************
728 Write data into an fd at a given offset. Ignore seek errors.
729 ********************************************************************/
731 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
736 if (pos == (SMB_OFF_T)-1) {
737 return write_data(fd, buffer, N);
739 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
741 ret = sys_pwrite(fd,buffer + total,N - total, pos);
742 if (ret == -1 && errno == ESPIPE) {
743 return write_data(fd, buffer + total,N - total);
746 DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
755 return (ssize_t)total;
757 /* Use lseek and write_data. */
758 if (sys_lseek(fd, pos, SEEK_SET) == -1) {
759 if (errno != ESPIPE) {
763 return write_data(fd, buffer, N);
767 /****************************************************************************
768 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
772 ****************************************************************************/
774 int set_blocking(int fd, BOOL set)
778 #define FLAG_TO_SET O_NONBLOCK
781 #define FLAG_TO_SET O_NDELAY
783 #define FLAG_TO_SET FNDELAY
787 if((val = sys_fcntl_long(fd, F_GETFL, 0)) == -1)
789 if(set) /* Turn blocking on - ie. clear nonblock flag */
793 return sys_fcntl_long( fd, F_SETFL, val);
797 /****************************************************************************
798 Transfer some data between two fd's.
799 ****************************************************************************/
801 #ifndef TRANSFER_BUF_SIZE
802 #define TRANSFER_BUF_SIZE 65536
805 ssize_t transfer_file_internal(int infd, int outfd, size_t n, ssize_t (*read_fn)(int, void *, size_t),
806 ssize_t (*write_fn)(int, const void *, size_t))
812 size_t num_to_read_thistime;
813 size_t num_written = 0;
815 if ((buf = SMB_MALLOC_ARRAY(char, TRANSFER_BUF_SIZE)) == NULL)
819 num_to_read_thistime = MIN((n - total), TRANSFER_BUF_SIZE);
821 read_ret = (*read_fn)(infd, buf, num_to_read_thistime);
822 if (read_ret == -1) {
823 DEBUG(0,("transfer_file_internal: read failure. Error = %s\n", strerror(errno) ));
832 while (num_written < read_ret) {
833 write_ret = (*write_fn)(outfd,buf + num_written, read_ret - num_written);
835 if (write_ret == -1) {
836 DEBUG(0,("transfer_file_internal: write failure. Error = %s\n", strerror(errno) ));
841 return (ssize_t)total;
843 num_written += (size_t)write_ret;
846 total += (size_t)read_ret;
850 return (ssize_t)total;
853 SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n)
855 return (SMB_OFF_T)transfer_file_internal(infd, outfd, (size_t)n, sys_read, sys_write);
858 /*******************************************************************
859 Sleep for a specified number of milliseconds.
860 ********************************************************************/
862 void smb_msleep(unsigned int t)
864 #if defined(HAVE_NANOSLEEP)
865 struct timespec tval;
868 tval.tv_sec = t/1000;
869 tval.tv_nsec = 1000000*(t%1000);
873 ret = nanosleep(&tval, &tval);
874 } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
876 unsigned int tdiff=0;
877 struct timeval tval,t1,t2;
884 tval.tv_sec = (t-tdiff)/1000;
885 tval.tv_usec = 1000*((t-tdiff)%1000);
887 /* Never wait for more than 1 sec. */
888 if (tval.tv_sec > 1) {
895 sys_select_intr(0,&fds,NULL,NULL,&tval);
898 if (t2.tv_sec < t1.tv_sec) {
899 /* Someone adjusted time... */
903 tdiff = TvalDiff(&t1,&t2);
908 /****************************************************************************
909 Become a daemon, discarding the controlling terminal.
910 ****************************************************************************/
912 void become_daemon(BOOL Fork, BOOL no_process_group)
920 /* detach from the terminal */
922 if (!no_process_group) setsid();
923 #elif defined(TIOCNOTTY)
924 if (!no_process_group) {
925 int i = sys_open("/dev/tty", O_RDWR, 0);
927 ioctl(i, (int) TIOCNOTTY, (char *)0);
931 #endif /* HAVE_SETSID */
933 /* Close fd's 0,1,2. Needed if started by rsh */
934 close_low_fds(False); /* Don't close stderr, let the debug system
935 attach it to the logfile */
938 /****************************************************************************
939 Put up a yes/no prompt.
940 ****************************************************************************/
947 if (!fgets(ans,sizeof(ans)-1,stdin))
950 if (*ans == 'y' || *ans == 'Y')
956 #if defined(PARANOID_MALLOC_CHECKER)
958 /****************************************************************************
959 Internal malloc wrapper. Externally visible.
960 ****************************************************************************/
962 void *malloc_(size_t size)
969 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
972 /****************************************************************************
973 Internal calloc wrapper. Not externally visible.
974 ****************************************************************************/
976 static void *calloc_(size_t count, size_t size)
978 if (size == 0 || count == 0) {
982 return calloc(count, size);
983 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
986 /****************************************************************************
987 Internal realloc wrapper. Not externally visible.
988 ****************************************************************************/
990 static void *realloc_(void *ptr, size_t size)
993 return realloc(ptr, size);
994 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
997 #endif /* PARANOID_MALLOC_CHECKER */
999 /****************************************************************************
1001 ****************************************************************************/
1003 void *malloc_array(size_t el_size, unsigned int count)
1005 if (count >= MAX_ALLOC_SIZE/el_size) {
1009 if (el_size == 0 || count == 0) {
1012 #if defined(PARANOID_MALLOC_CHECKER)
1013 return malloc_(el_size*count);
1015 return malloc(el_size*count);
1019 /****************************************************************************
1021 ****************************************************************************/
1023 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1025 if (count >= MAX_ALLOC_SIZE/el_size) {
1029 return sys_memalign(align, el_size*count);
1032 /****************************************************************************
1034 ****************************************************************************/
1036 void *calloc_array(size_t size, size_t nmemb)
1038 if (nmemb >= MAX_ALLOC_SIZE/size) {
1041 if (size == 0 || nmemb == 0) {
1044 #if defined(PARANOID_MALLOC_CHECKER)
1045 return calloc_(nmemb, size);
1047 return calloc(nmemb, size);
1051 /****************************************************************************
1052 Expand a pointer to be a particular size.
1053 Note that this version of Realloc has an extra parameter that decides
1054 whether to free the passed in storage on allocation failure or if the
1057 This is designed for use in the typical idiom of :
1059 p = SMB_REALLOC(p, size)
1064 and not to have to keep track of the old 'p' contents to free later, nor
1065 to worry if the size parameter was zero. In the case where NULL is returned
1066 we guarentee that p has been freed.
1068 If free later semantics are desired, then pass 'free_old_on_error' as False which
1069 guarentees that the old contents are not freed on error, even if size == 0. To use
1072 tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1080 Changes were instigated by Coverity error checking. JRA.
1081 ****************************************************************************/
1083 void *Realloc(void *p, size_t size, BOOL free_old_on_error)
1088 if (free_old_on_error) {
1091 DEBUG(2,("Realloc asked for 0 bytes\n"));
1095 #if defined(PARANOID_MALLOC_CHECKER)
1097 ret = (void *)malloc_(size);
1099 ret = (void *)realloc_(p,size);
1103 ret = (void *)malloc(size);
1105 ret = (void *)realloc(p,size);
1110 if (free_old_on_error && p) {
1113 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1119 /****************************************************************************
1121 ****************************************************************************/
1123 void *realloc_array(void *p, size_t el_size, unsigned int count, BOOL free_old_on_error)
1125 if (count >= MAX_ALLOC_SIZE/el_size) {
1126 if (free_old_on_error) {
1131 return Realloc(p, el_size*count, free_old_on_error);
1134 /****************************************************************************
1135 (Hopefully) efficient array append.
1136 ****************************************************************************/
1138 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1139 void *element, void *_array, uint32 *num_elements,
1140 ssize_t *array_size)
1142 void **array = (void **)_array;
1144 if (*array_size < 0) {
1148 if (*array == NULL) {
1149 if (*array_size == 0) {
1153 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1157 *array = TALLOC(mem_ctx, element_size * (*array_size));
1158 if (*array == NULL) {
1163 if (*num_elements == *array_size) {
1166 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1170 *array = TALLOC_REALLOC(mem_ctx, *array,
1171 element_size * (*array_size));
1173 if (*array == NULL) {
1178 memcpy((char *)(*array) + element_size*(*num_elements),
1179 element, element_size);
1189 /****************************************************************************
1190 Free memory, checks for NULL.
1191 Use directly SAFE_FREE()
1192 Exists only because we need to pass a function pointer somewhere --SSS
1193 ****************************************************************************/
1195 void safe_free(void *p)
1200 /****************************************************************************
1201 Get my own name and IP.
1202 ****************************************************************************/
1204 BOOL get_myname(char *my_name)
1210 /* get my host name */
1211 if (gethostname(hostname, sizeof(hostname)) == -1) {
1212 DEBUG(0,("gethostname failed\n"));
1216 /* Ensure null termination. */
1217 hostname[sizeof(hostname)-1] = '\0';
1220 /* split off any parts after an initial . */
1221 char *p = strchr_m(hostname,'.');
1226 fstrcpy(my_name,hostname);
1232 /****************************************************************************
1233 Get my own canonical name, including domain.
1234 ****************************************************************************/
1236 BOOL get_mydnsfullname(fstring my_dnsname)
1238 static fstring dnshostname;
1241 if (!*dnshostname) {
1242 /* get my host name */
1243 if (gethostname(dnshostname, sizeof(dnshostname)) == -1) {
1244 *dnshostname = '\0';
1245 DEBUG(0,("gethostname failed\n"));
1249 /* Ensure null termination. */
1250 dnshostname[sizeof(dnshostname)-1] = '\0';
1252 /* Ensure we get the cannonical name. */
1253 if (!(hp = sys_gethostbyname(dnshostname))) {
1254 *dnshostname = '\0';
1257 fstrcpy(dnshostname, hp->h_name);
1259 fstrcpy(my_dnsname, dnshostname);
1263 /****************************************************************************
1264 Get my own domain name.
1265 ****************************************************************************/
1267 BOOL get_mydnsdomname(fstring my_domname)
1273 if (!get_mydnsfullname(domname)) {
1276 p = strchr_m(domname, '.');
1279 fstrcpy(my_domname, p);
1286 /****************************************************************************
1287 Interpret a protocol description string, with a default.
1288 ****************************************************************************/
1290 int interpret_protocol(const char *str,int def)
1292 if (strequal(str,"NT1"))
1293 return(PROTOCOL_NT1);
1294 if (strequal(str,"LANMAN2"))
1295 return(PROTOCOL_LANMAN2);
1296 if (strequal(str,"LANMAN1"))
1297 return(PROTOCOL_LANMAN1);
1298 if (strequal(str,"CORE"))
1299 return(PROTOCOL_CORE);
1300 if (strequal(str,"COREPLUS"))
1301 return(PROTOCOL_COREPLUS);
1302 if (strequal(str,"CORE+"))
1303 return(PROTOCOL_COREPLUS);
1305 DEBUG(0,("Unrecognised protocol level %s\n",str));
1310 /****************************************************************************
1311 Return true if a string could be a pure IP address.
1312 ****************************************************************************/
1314 BOOL is_ipaddress(const char *str)
1316 BOOL pure_address = True;
1319 for (i=0; pure_address && str[i]; i++)
1320 if (!(isdigit((int)str[i]) || str[i] == '.'))
1321 pure_address = False;
1323 /* Check that a pure number is not misinterpreted as an IP */
1324 pure_address = pure_address && (strchr_m(str, '.') != NULL);
1326 return pure_address;
1329 /****************************************************************************
1330 Interpret an internet address or name into an IP address in 4 byte form.
1331 ****************************************************************************/
1333 uint32 interpret_addr(const char *str)
1338 if (strcmp(str,"0.0.0.0") == 0)
1340 if (strcmp(str,"255.255.255.255") == 0)
1343 /* if it's in the form of an IP address then get the lib to interpret it */
1344 if (is_ipaddress(str)) {
1345 res = inet_addr(str);
1347 /* otherwise assume it's a network name of some sort and use
1348 sys_gethostbyname */
1349 if ((hp = sys_gethostbyname(str)) == 0) {
1350 DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
1354 if(hp->h_addr == NULL) {
1355 DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
1358 putip((char *)&res,(char *)hp->h_addr);
1361 if (res == (uint32)-1)
1367 /*******************************************************************
1368 A convenient addition to interpret_addr().
1369 ******************************************************************/
1371 struct in_addr *interpret_addr2(const char *str)
1373 static struct in_addr ret;
1374 uint32 a = interpret_addr(str);
1379 /*******************************************************************
1380 Check if an IP is the 0.0.0.0.
1381 ******************************************************************/
1383 BOOL is_zero_ip(struct in_addr ip)
1386 putip((char *)&a,(char *)&ip);
1390 /*******************************************************************
1391 Set an IP to 0.0.0.0.
1392 ******************************************************************/
1394 void zero_ip(struct in_addr *ip)
1397 static struct in_addr ipzero;
1400 ipzero = *interpret_addr2("0.0.0.0");
1407 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1408 /******************************************************************
1409 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1410 Based on a fix from <Thomas.Hepper@icem.de>.
1411 *******************************************************************/
1413 static void strip_mount_options( pstring *str)
1417 while(*p && !isspace(*p))
1419 while(*p && isspace(*p))
1424 pstrcpy(tmp_str, p);
1425 pstrcpy(*str, tmp_str);
1430 /*******************************************************************
1431 Patch from jkf@soton.ac.uk
1432 Split Luke's automount_server into YP lookup and string splitter
1433 so can easily implement automount_path().
1434 As we may end up doing both, cache the last YP result.
1435 *******************************************************************/
1437 #ifdef WITH_NISPLUS_HOME
1438 char *automount_lookup(const char *user_name)
1440 static fstring last_key = "";
1441 static pstring last_value = "";
1443 char *nis_map = (char *)lp_nis_home_map_name();
1445 char buffer[NIS_MAXATTRVAL + 1];
1450 if (strcmp(user_name, last_key)) {
1451 slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
1452 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1454 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1455 if (result->status != NIS_SUCCESS) {
1456 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1457 fstrcpy(last_key, ""); pstrcpy(last_value, "");
1459 object = result->objects.objects_val;
1460 if (object->zo_data.zo_type == ENTRY_OBJ) {
1461 entry = &object->zo_data.objdata_u.en_data;
1462 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1463 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1465 pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1466 pstring_sub(last_value, "&", user_name);
1467 fstrcpy(last_key, user_name);
1471 nis_freeresult(result);
1474 strip_mount_options(&last_value);
1476 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
1479 #else /* WITH_NISPLUS_HOME */
1481 char *automount_lookup(const char *user_name)
1483 static fstring last_key = "";
1484 static pstring last_value = "";
1486 int nis_error; /* returned by yp all functions */
1487 char *nis_result; /* yp_match inits this */
1488 int nis_result_len; /* and set this */
1489 char *nis_domain; /* yp_get_default_domain inits this */
1490 char *nis_map = (char *)lp_nis_home_map_name();
1492 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1493 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1497 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1499 if (!strcmp(user_name, last_key)) {
1500 nis_result = last_value;
1501 nis_result_len = strlen(last_value);
1504 if ((nis_error = yp_match(nis_domain, nis_map, user_name, strlen(user_name),
1505 &nis_result, &nis_result_len)) == 0) {
1506 fstrcpy(last_key, user_name);
1507 pstrcpy(last_value, nis_result);
1508 strip_mount_options(&last_value);
1510 } else if(nis_error == YPERR_KEY) {
1512 /* If Key lookup fails user home server is not in nis_map
1513 use default information for server, and home directory */
1515 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1516 user_name, nis_map));
1517 DEBUG(3, ("using defaults for server and home directory\n"));
1519 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1520 yperr_string(nis_error), user_name, nis_map));
1524 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
1527 #endif /* WITH_NISPLUS_HOME */
1530 /*******************************************************************
1531 Are two IPs on the same subnet?
1532 ********************************************************************/
1534 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
1536 uint32 net1,net2,nmask;
1538 nmask = ntohl(mask.s_addr);
1539 net1 = ntohl(ip1.s_addr);
1540 net2 = ntohl(ip2.s_addr);
1542 return((net1 & nmask) == (net2 & nmask));
1546 /****************************************************************************
1547 Check if a process exists. Does this work on all unixes?
1548 ****************************************************************************/
1550 BOOL process_exists(const struct server_id pid)
1552 if (procid_is_me(&pid)) {
1556 if (procid_is_local(&pid)) {
1557 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1560 #ifdef CLUSTER_SUPPORT
1561 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1568 BOOL process_exists_by_pid(pid_t pid)
1570 /* Doing kill with a non-positive pid causes messages to be
1571 * sent to places we don't want. */
1572 SMB_ASSERT(pid > 0);
1573 return(kill(pid,0) == 0 || errno != ESRCH);
1576 /*******************************************************************
1577 Convert a uid into a user name.
1578 ********************************************************************/
1580 const char *uidtoname(uid_t uid)
1582 TALLOC_CTX *ctx = talloc_tos();
1584 struct passwd *pass = NULL;
1586 pass = getpwuid_alloc(ctx,uid);
1588 name = talloc_strdup(ctx,pass->pw_name);
1591 name = talloc_asprintf(ctx,
1598 /*******************************************************************
1599 Convert a gid into a group name.
1600 ********************************************************************/
1602 char *gidtoname(gid_t gid)
1607 grp = getgrgid(gid);
1609 fstrcpy(name, grp->gr_name);
1612 slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1614 return talloc_strdup(talloc_tos(), name);
1617 /*******************************************************************
1618 Convert a user name into a uid.
1619 ********************************************************************/
1621 uid_t nametouid(const char *name)
1623 struct passwd *pass;
1627 pass = getpwnam_alloc(NULL, name);
1634 u = (uid_t)strtol(name, &p, 0);
1635 if ((p != name) && (*p == '\0'))
1641 /*******************************************************************
1642 Convert a name to a gid_t if possible. Return -1 if not a group.
1643 ********************************************************************/
1645 gid_t nametogid(const char *name)
1651 g = (gid_t)strtol(name, &p, 0);
1652 if ((p != name) && (*p == '\0'))
1655 grp = sys_getgrnam(name);
1657 return(grp->gr_gid);
1661 /*******************************************************************
1662 Something really nasty happened - panic !
1663 ********************************************************************/
1665 void smb_panic(const char *const why)
1673 if (global_clobber_region_function) {
1674 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1675 global_clobber_region_function,
1676 global_clobber_region_line));
1681 DEBUG(0,("PANIC (pid %llu): %s\n",
1682 (unsigned long long)sys_getpid(), why));
1685 cmd = lp_panic_action();
1687 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1688 result = system(cmd);
1691 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1694 DEBUG(0, ("smb_panic(): action returned status %d\n",
1695 WEXITSTATUS(result)));
1701 /*******************************************************************
1702 Print a backtrace of the stack to the debug log. This function
1703 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1704 exit shortly after calling it.
1705 ********************************************************************/
1707 #ifdef HAVE_LIBUNWIND_H
1708 #include <libunwind.h>
1711 #ifdef HAVE_EXECINFO_H
1712 #include <execinfo.h>
1715 #ifdef HAVE_LIBEXC_H
1719 void log_stack_trace(void)
1721 #ifdef HAVE_LIBUNWIND
1722 /* Try to use libunwind before any other technique since on ia64
1723 * libunwind correctly walks the stack in more circumstances than
1726 unw_cursor_t cursor;
1731 unw_word_t ip, sp, off;
1733 procname[sizeof(procname) - 1] = '\0';
1735 if (unw_getcontext(&uc) != 0) {
1736 goto libunwind_failed;
1739 if (unw_init_local(&cursor, &uc) != 0) {
1740 goto libunwind_failed;
1743 DEBUG(0, ("BACKTRACE:\n"));
1747 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1748 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1750 switch (unw_get_proc_name(&cursor,
1751 procname, sizeof(procname) - 1, &off) ) {
1755 /* Name truncated. */
1756 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1757 i, procname, (long long)off,
1758 (long long)ip, (long long) sp));
1761 /* case -UNW_ENOINFO: */
1762 /* case -UNW_EUNSPEC: */
1763 /* No symbol name found. */
1764 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1765 i, "<unknown symbol>",
1766 (long long)ip, (long long) sp));
1769 } while (unw_step(&cursor) > 0);
1774 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1776 #elif HAVE_BACKTRACE_SYMBOLS
1777 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1778 size_t backtrace_size;
1779 char **backtrace_strings;
1781 /* get the backtrace (stack frames) */
1782 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1783 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1785 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1786 (unsigned long)backtrace_size));
1788 if (backtrace_strings) {
1791 for (i = 0; i < backtrace_size; i++)
1792 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1794 /* Leak the backtrace_strings, rather than risk what free() might do */
1799 /* The IRIX libexc library provides an API for unwinding the stack. See
1800 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1801 * since we are about to abort anyway, it hardly matters.
1804 #define NAMESIZE 32 /* Arbitrary */
1806 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1807 char * names[BACKTRACE_STACK_SIZE];
1808 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1815 ZERO_ARRAY(namebuf);
1817 /* We need to be root so we can open our /proc entry to walk
1818 * our stack. It also helps when we want to dump core.
1822 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1823 names[i] = namebuf + (i * NAMESIZE);
1826 levels = trace_back_stack(0, addrs, names,
1827 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1829 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1830 for (i = 0; i < levels; i++) {
1831 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1836 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1840 /*******************************************************************
1841 A readdir wrapper which just returns the file name.
1842 ********************************************************************/
1844 const char *readdirname(SMB_STRUCT_DIR *p)
1846 SMB_STRUCT_DIRENT *ptr;
1852 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1856 dname = ptr->d_name;
1863 #ifdef HAVE_BROKEN_READDIR_NAME
1864 /* using /usr/ucb/cc is BAD */
1868 return talloc_strdup(talloc_tos(), dname);
1871 /*******************************************************************
1872 Utility function used to decide if the last component
1873 of a path matches a (possibly wildcarded) entry in a namelist.
1874 ********************************************************************/
1876 BOOL is_in_path(const char *name, name_compare_entry *namelist, BOOL case_sensitive)
1878 const char *last_component;
1880 /* if we have no list it's obviously not in the path */
1881 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1885 DEBUG(8, ("is_in_path: %s\n", name));
1887 /* Get the last component of the unix name. */
1888 last_component = strrchr_m(name, '/');
1889 if (!last_component) {
1890 last_component = name;
1892 last_component++; /* Go past '/' */
1895 for(; namelist->name != NULL; namelist++) {
1896 if(namelist->is_wild) {
1897 if (mask_match(last_component, namelist->name, case_sensitive)) {
1898 DEBUG(8,("is_in_path: mask match succeeded\n"));
1902 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1903 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1904 DEBUG(8,("is_in_path: match succeeded\n"));
1909 DEBUG(8,("is_in_path: match not found\n"));
1913 /*******************************************************************
1914 Strip a '/' separated list into an array of
1915 name_compare_enties structures suitable for
1916 passing to is_in_path(). We do this for
1917 speed so we can pre-parse all the names in the list
1918 and don't do it for each call to is_in_path().
1919 namelist is modified here and is assumed to be
1920 a copy owned by the caller.
1921 We also check if the entry contains a wildcard to
1922 remove a potentially expensive call to mask_match
1924 ********************************************************************/
1926 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1929 char *nameptr = namelist;
1930 int num_entries = 0;
1933 (*ppname_array) = NULL;
1935 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1938 /* We need to make two passes over the string. The
1939 first to count the number of elements, the second
1944 if ( *nameptr == '/' ) {
1945 /* cope with multiple (useless) /s) */
1949 /* find the next / */
1950 name_end = strchr_m(nameptr, '/');
1952 /* oops - the last check for a / didn't find one. */
1953 if (name_end == NULL)
1956 /* next segment please */
1957 nameptr = name_end + 1;
1961 if(num_entries == 0)
1964 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1965 DEBUG(0,("set_namearray: malloc fail\n"));
1969 /* Now copy out the names */
1973 if ( *nameptr == '/' ) {
1974 /* cope with multiple (useless) /s) */
1978 /* find the next / */
1979 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1982 /* oops - the last check for a / didn't find one. */
1983 if(name_end == NULL)
1986 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1987 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1988 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1992 /* next segment please */
1993 nameptr = name_end + 1;
1997 (*ppname_array)[i].name = NULL;
2002 /****************************************************************************
2003 Routine to free a namearray.
2004 ****************************************************************************/
2006 void free_namearray(name_compare_entry *name_array)
2010 if(name_array == NULL)
2013 for(i=0; name_array[i].name!=NULL; i++)
2014 SAFE_FREE(name_array[i].name);
2015 SAFE_FREE(name_array);
2019 #define DBGC_CLASS DBGC_LOCKING
2021 /****************************************************************************
2022 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
2023 is dealt with in posix.c
2024 Returns True if the lock was granted, False otherwise.
2025 ****************************************************************************/
2027 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
2029 SMB_STRUCT_FLOCK lock;
2032 DEBUG(8,("fcntl_lock fd=%d op=%d offset=%.0f count=%.0f type=%d\n",
2033 fd,op,(double)offset,(double)count,type));
2036 lock.l_whence = SEEK_SET;
2037 lock.l_start = offset;
2041 ret = sys_fcntl_ptr(fd,op,&lock);
2045 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
2046 (double)offset,(double)count,op,type,strerror(errno)));
2051 /* everything went OK */
2052 DEBUG(8,("fcntl_lock: Lock call successful\n"));
2057 /****************************************************************************
2058 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
2059 is dealt with in posix.c
2060 Returns True if we have information regarding this lock region (and returns
2061 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
2062 ****************************************************************************/
2064 BOOL fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
2066 SMB_STRUCT_FLOCK lock;
2069 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
2070 fd,(double)*poffset,(double)*pcount,*ptype));
2072 lock.l_type = *ptype;
2073 lock.l_whence = SEEK_SET;
2074 lock.l_start = *poffset;
2075 lock.l_len = *pcount;
2078 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
2082 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
2083 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
2088 *ptype = lock.l_type;
2089 *poffset = lock.l_start;
2090 *pcount = lock.l_len;
2093 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
2094 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
2099 #define DBGC_CLASS DBGC_ALL
2101 /*******************************************************************
2102 Is the name specified one of my netbios names.
2103 Returns true if it is equal, false otherwise.
2104 ********************************************************************/
2106 BOOL is_myname(const char *s)
2111 for (n=0; my_netbios_names(n); n++) {
2112 if (strequal(my_netbios_names(n), s)) {
2117 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
2121 BOOL is_myname_or_ipaddr(const char *s)
2123 fstring name, dnsname;
2129 /* santize the string from '\\name' */
2133 servername = strrchr_m( name, '\\' );
2139 /* optimize for the common case */
2141 if (strequal(servername, global_myname()))
2144 /* check for an alias */
2146 if (is_myname(servername))
2149 /* check for loopback */
2151 if (strequal(servername, "127.0.0.1"))
2154 if (strequal(servername, "localhost"))
2157 /* maybe it's my dns name */
2159 if ( get_mydnsfullname( dnsname ) )
2160 if ( strequal( servername, dnsname ) )
2163 /* handle possible CNAME records */
2165 if ( !is_ipaddress( servername ) ) {
2166 /* use DNS to resolve the name, but only the first address */
2169 if (((hp = sys_gethostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
2170 struct in_addr return_ip;
2171 putip( (char*)&return_ip, (char*)hp->h_addr );
2172 fstrcpy( name, inet_ntoa( return_ip ) );
2177 /* maybe its an IP address? */
2178 if (is_ipaddress(servername)) {
2179 struct iface_struct nics[MAX_INTERFACES];
2183 ip = interpret_addr(servername);
2184 if ((ip==0) || (ip==0xffffffff))
2187 n = get_interfaces(nics, MAX_INTERFACES);
2188 for (i=0; i<n; i++) {
2189 if (ip == nics[i].iface_addr.ip.s_addr)
2198 /*******************************************************************
2199 Is the name specified our workgroup/domain.
2200 Returns true if it is equal, false otherwise.
2201 ********************************************************************/
2203 BOOL is_myworkgroup(const char *s)
2207 if (strequal(s, lp_workgroup())) {
2211 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
2215 /*******************************************************************
2216 we distinguish between 2K and XP by the "Native Lan Manager" string
2217 WinXP => "Windows 2002 5.1"
2218 WinXP 64bit => "Windows XP 5.2"
2219 Win2k => "Windows 2000 5.0"
2220 NT4 => "Windows NT 4.0"
2221 Win9x => "Windows 4.0"
2222 Windows 2003 doesn't set the native lan manager string but
2223 they do set the domain to "Windows 2003 5.2" (probably a bug).
2224 ********************************************************************/
2226 void ra_lanman_string( const char *native_lanman )
2228 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
2229 set_remote_arch( RA_WINXP );
2230 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
2231 set_remote_arch( RA_WINXP );
2232 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
2233 set_remote_arch( RA_WIN2K3 );
2236 /*******************************************************************
2237 Set the horrid remote_arch string based on an enum.
2238 ********************************************************************/
2240 void set_remote_arch(enum remote_arch_types type)
2245 fstrcpy(remote_arch, "WfWg");
2248 fstrcpy(remote_arch, "OS2");
2251 fstrcpy(remote_arch, "Win95");
2254 fstrcpy(remote_arch, "WinNT");
2257 fstrcpy(remote_arch, "Win2K");
2260 fstrcpy(remote_arch, "WinXP");
2263 fstrcpy(remote_arch, "Win2K3");
2266 fstrcpy(remote_arch, "Vista");
2269 fstrcpy(remote_arch,"Samba");
2272 fstrcpy(remote_arch,"CIFSFS");
2275 ra_type = RA_UNKNOWN;
2276 fstrcpy(remote_arch, "UNKNOWN");
2280 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n", remote_arch));
2283 /*******************************************************************
2284 Get the remote_arch type.
2285 ********************************************************************/
2287 enum remote_arch_types get_remote_arch(void)
2292 void print_asc(int level, const unsigned char *buf,int len)
2296 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
2299 void dump_data(int level, const unsigned char *buf,int len)
2304 if (!DEBUGLVL(level)) return;
2306 DEBUGADD(level,("[%03X] ",i));
2308 DEBUGADD(level,("%02X ",(int)buf[i]));
2310 if (i%8 == 0) DEBUGADD(level,(" "));
2312 print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
2313 print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
2314 if (i<len) DEBUGADD(level,("[%03X] ",i));
2320 DEBUGADD(level,(" "));
2321 if (n>8) DEBUGADD(level,(" "));
2322 while (n--) DEBUGADD(level,(" "));
2324 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2326 if (n>0) print_asc(level,&buf[i-n],n);
2327 DEBUGADD(level,("\n"));
2331 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2333 #ifdef DEBUG_PASSWORD
2334 DEBUG(11, ("%s", msg));
2335 if (data != NULL && len > 0)
2337 dump_data(11, data, len);
2342 char *tab_depth(int depth)
2344 static pstring spaces;
2345 memset(spaces, ' ', depth * 4);
2346 spaces[depth * 4] = 0;
2350 /*****************************************************************************
2351 Provide a checksum on a string
2353 Input: s - the null-terminated character string for which the checksum
2356 Output: The checksum value calculated for s.
2357 *****************************************************************************/
2359 int str_checksum(const char *s)
2367 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2374 /*****************************************************************
2375 Zero a memory area then free it. Used to catch bugs faster.
2376 *****************************************************************/
2378 void zero_free(void *p, size_t size)
2384 /*****************************************************************
2385 Set our open file limit to a requested max and return the limit.
2386 *****************************************************************/
2388 int set_maxfiles(int requested_max)
2390 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2392 int saved_current_limit;
2394 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2395 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2398 return requested_max;
2402 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2403 * account for the extra fd we need
2404 * as well as the log files and standard
2405 * handles etc. Save the limit we want to set in case
2406 * we are running on an OS that doesn't support this limit (AIX)
2407 * which always returns RLIM_INFINITY for rlp.rlim_max.
2410 /* Try raising the hard (max) limit to the requested amount. */
2412 #if defined(RLIM_INFINITY)
2413 if (rlp.rlim_max != RLIM_INFINITY) {
2414 int orig_max = rlp.rlim_max;
2416 if ( rlp.rlim_max < requested_max )
2417 rlp.rlim_max = requested_max;
2419 /* This failing is not an error - many systems (Linux) don't
2420 support our default request of 10,000 open files. JRA. */
2422 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2423 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2424 (int)rlp.rlim_max, strerror(errno) ));
2426 /* Set failed - restore original value from get. */
2427 rlp.rlim_max = orig_max;
2432 /* Now try setting the soft (current) limit. */
2434 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2436 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2437 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2438 (int)rlp.rlim_cur, strerror(errno) ));
2440 return saved_current_limit;
2443 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2444 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2447 return saved_current_limit;
2450 #if defined(RLIM_INFINITY)
2451 if(rlp.rlim_cur == RLIM_INFINITY)
2452 return saved_current_limit;
2455 if((int)rlp.rlim_cur > saved_current_limit)
2456 return saved_current_limit;
2458 return rlp.rlim_cur;
2459 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2461 * No way to know - just guess...
2463 return requested_max;
2467 /*****************************************************************
2468 Possibly replace mkstemp if it is broken.
2469 *****************************************************************/
2471 int smb_mkstemp(char *name_template)
2473 #if HAVE_SECURE_MKSTEMP
2474 return mkstemp(name_template);
2476 /* have a reasonable go at emulating it. Hope that
2477 the system mktemp() isn't completly hopeless */
2478 char *p = mktemp(name_template);
2481 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2485 /*****************************************************************
2486 malloc that aborts with smb_panic on fail or zero size.
2487 *****************************************************************/
2489 void *smb_xmalloc_array(size_t size, unsigned int count)
2493 smb_panic("smb_xmalloc_array: called with zero size");
2495 if (count >= MAX_ALLOC_SIZE/size) {
2496 smb_panic("smb_xmalloc_array: alloc size too large");
2498 if ((p = SMB_MALLOC(size*count)) == NULL) {
2499 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2500 (unsigned long)size, (unsigned long)count));
2501 smb_panic("smb_xmalloc_array: malloc failed");
2507 Memdup with smb_panic on fail.
2510 void *smb_xmemdup(const void *p, size_t size)
2513 p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2514 memcpy(p2, p, size);
2519 strdup that aborts on malloc fail.
2522 char *smb_xstrdup(const char *s)
2524 #if defined(PARANOID_MALLOC_CHECKER)
2531 #define strdup rep_strdup
2534 char *s1 = strdup(s);
2535 #if defined(PARANOID_MALLOC_CHECKER)
2539 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2542 smb_panic("smb_xstrdup: malloc failed");
2549 strndup that aborts on malloc fail.
2552 char *smb_xstrndup(const char *s, size_t n)
2554 #if defined(PARANOID_MALLOC_CHECKER)
2560 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
2562 #define strndup rep_strndup
2565 char *s1 = strndup(s, n);
2566 #if defined(PARANOID_MALLOC_CHECKER)
2570 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2573 smb_panic("smb_xstrndup: malloc failed");
2579 vasprintf that aborts on malloc fail
2582 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2589 n = vasprintf(ptr, format, ap2);
2590 if (n == -1 || ! *ptr) {
2591 smb_panic("smb_xvasprintf: out of memory");
2596 /*****************************************************************
2597 Like strdup but for memory.
2598 *****************************************************************/
2600 void *memdup(const void *p, size_t size)
2605 p2 = SMB_MALLOC(size);
2608 memcpy(p2, p, size);
2612 /*****************************************************************
2613 Get local hostname and cache result.
2614 *****************************************************************/
2616 char *myhostname(void)
2624 /*****************************************************************
2625 A useful function for returning a path in the Samba lock directory.
2626 *****************************************************************/
2628 char *lock_path(const char *name)
2632 pstrcpy(fname,lp_lockdir());
2633 trim_char(fname,'\0','/');
2635 if (!directory_exist(fname,NULL))
2639 pstrcat(fname,name);
2641 return talloc_strdup(talloc_tos(), fname);
2644 /*****************************************************************
2645 A useful function for returning a path in the Samba pid directory.
2646 *****************************************************************/
2648 char *pid_path(const char *name)
2652 pstrcpy(fname,lp_piddir());
2653 trim_char(fname,'\0','/');
2655 if (!directory_exist(fname,NULL))
2659 pstrcat(fname,name);
2661 return talloc_strdup(talloc_tos(), fname);
2665 * @brief Returns an absolute path to a file in the Samba lib directory.
2667 * @param name File to find, relative to LIBDIR.
2669 * @retval Pointer to a static #pstring containing the full path.
2672 char *lib_path(const char *name)
2674 return talloc_asprintf(talloc_tos(), "%s/%s", dyn_LIBDIR, name);
2678 * @brief Returns the platform specific shared library extension.
2680 * @retval Pointer to a static #fstring containing the extension.
2683 const char *shlib_ext(void)
2685 return dyn_SHLIBEXT;
2688 /*******************************************************************
2689 Given a filename - get its directory name
2690 NB: Returned in static storage. Caveats:
2691 o If caller wishes to preserve, they should copy.
2692 ********************************************************************/
2694 char *parent_dirname(const char *path)
2698 if (!parent_dirname_talloc(talloc_tos(), path, &parent, NULL)) {
2705 BOOL parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2706 char **parent, const char **name)
2711 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2714 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2725 if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2728 memcpy(*parent, dir, len);
2729 (*parent)[len] = '\0';
2737 /*******************************************************************
2738 Determine if a pattern contains any Microsoft wildcard characters.
2739 *******************************************************************/
2741 BOOL ms_has_wild(const char *s)
2745 if (lp_posix_pathnames()) {
2746 /* With posix pathnames no characters are wild. */
2750 while ((c = *s++)) {
2763 BOOL ms_has_wild_w(const smb_ucs2_t *s)
2766 if (!s) return False;
2767 while ((c = *s++)) {
2769 case UCS2_CHAR('*'):
2770 case UCS2_CHAR('?'):
2771 case UCS2_CHAR('<'):
2772 case UCS2_CHAR('>'):
2773 case UCS2_CHAR('"'):
2780 /*******************************************************************
2781 A wrapper that handles case sensitivity and the special handling
2783 *******************************************************************/
2785 BOOL mask_match(const char *string, const char *pattern, BOOL is_case_sensitive)
2787 if (strcmp(string,"..") == 0)
2789 if (strcmp(pattern,".") == 0)
2792 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2795 /*******************************************************************
2796 A wrapper that handles case sensitivity and the special handling
2797 of the ".." name. Varient that is only called by old search code which requires
2798 pattern translation.
2799 *******************************************************************/
2801 BOOL mask_match_search(const char *string, const char *pattern, BOOL is_case_sensitive)
2803 if (strcmp(string,"..") == 0)
2805 if (strcmp(pattern,".") == 0)
2808 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2811 /*******************************************************************
2812 A wrapper that handles a list of patters and calls mask_match()
2813 on each. Returns True if any of the patterns match.
2814 *******************************************************************/
2816 BOOL mask_match_list(const char *string, char **list, int listLen, BOOL is_case_sensitive)
2818 while (listLen-- > 0) {
2819 if (mask_match(string, *list++, is_case_sensitive))
2825 /*********************************************************
2826 Recursive routine that is called by unix_wild_match.
2827 *********************************************************/
2829 static BOOL unix_do_match(const char *regexp, const char *str)
2833 for( p = regexp; *p && *str; ) {
2844 * Look for a character matching
2845 * the one after the '*'.
2849 return True; /* Automatic match */
2852 while(*str && (*p != *str))
2856 * Patch from weidel@multichart.de. In the case of the regexp
2857 * '*XX*' we want to ensure there are at least 2 'X' characters
2858 * in the string after the '*' for a match to be made.
2865 * Eat all the characters that match, but count how many there were.
2868 while(*str && (*p == *str)) {
2874 * Now check that if the regexp had n identical characters that
2875 * matchcount had at least that many matches.
2878 while ( *(p+1) && (*(p+1) == *p)) {
2883 if ( matchcount <= 0 )
2887 str--; /* We've eaten the match char after the '*' */
2889 if(unix_do_match(p, str))
2911 if (!*p && str[0] == '.' && str[1] == 0)
2914 if (!*str && *p == '?') {
2920 if(!*str && (*p == '*' && p[1] == '\0'))
2926 /*******************************************************************
2927 Simple case insensitive interface to a UNIX wildcard matcher.
2928 Returns True if match, False if not.
2929 *******************************************************************/
2931 BOOL unix_wild_match(const char *pattern, const char *string)
2936 pstrcpy(p2, pattern);
2937 pstrcpy(s2, string);
2941 /* Remove any *? and ** from the pattern as they are meaningless */
2942 for(p = p2; *p; p++)
2943 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
2944 pstrcpy( &p[1], &p[2]);
2946 if (strequal(p2,"*"))
2949 return unix_do_match(p2, s2);
2952 /**********************************************************************
2953 Converts a name to a fully qualified domain name.
2954 Returns True if lookup succeeded, False if not (then fqdn is set to name)
2955 ***********************************************************************/
2957 BOOL name_to_fqdn(fstring fqdn, const char *name)
2959 struct hostent *hp = sys_gethostbyname(name);
2961 if ( hp && hp->h_name && *hp->h_name ) {
2964 /* find out if the fqdn is returned as an alias
2965 * to cope with /etc/hosts files where the first
2966 * name is not the fqdn but the short name */
2967 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2969 for (i = 0; hp->h_aliases[i]; i++) {
2970 if (strchr_m(hp->h_aliases[i], '.')) {
2971 full = hp->h_aliases[i];
2976 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2977 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2978 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2979 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2980 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2988 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2989 fstrcpy(fqdn, full);
2992 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2993 fstrcpy(fqdn, name);
2998 /**********************************************************************
2999 Extension to talloc_get_type: Abort on type mismatch
3000 ***********************************************************************/
3002 void *talloc_check_name_abort(const void *ptr, const char *name)
3006 result = talloc_check_name(ptr, name);
3010 DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
3011 name, talloc_get_name(ptr)));
3012 smb_panic("talloc type mismatch");
3013 /* Keep the compiler happy */
3020 /*******************************************************************
3021 This routine is a trick to immediately catch errors when debugging
3022 with insure. A xterm with a gdb is popped up when insure catches
3023 a error. It is Linux specific.
3024 ********************************************************************/
3026 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
3031 /* you can get /usr/bin/backtrace from
3032 http://samba.org/ftp/unpacked/junkcode/backtrace */
3033 pstring cmd = "/usr/bin/backtrace %d";
3035 slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
3036 pstring_sub(cmd, "%d", pidstr);
3040 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
3041 fn = dlsym(h, "_Insure_trap_error");
3043 if (!h || h == _Insure_trap_error) {
3044 h = dlopen("/usr/local/parasoft/lib.linux2/libinsure.so", RTLD_LAZY);
3045 fn = dlsym(h, "_Insure_trap_error");
3049 ret = fn(a1, a2, a3, a4, a5, a6);
3057 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
3059 switch (share_access & ~FILE_SHARE_DELETE) {
3060 case FILE_SHARE_NONE:
3062 case FILE_SHARE_READ:
3064 case FILE_SHARE_WRITE:
3066 case FILE_SHARE_READ|FILE_SHARE_WRITE:
3069 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
3071 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
3078 pid_t procid_to_pid(const struct server_id *proc)
3083 static uint32 my_vnn = NONCLUSTER_VNN;
3085 void set_my_vnn(uint32 vnn)
3087 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3091 uint32 get_my_vnn(void)
3096 struct server_id pid_to_procid(pid_t pid)
3098 struct server_id result;
3100 #ifdef CLUSTER_SUPPORT
3101 result.vnn = my_vnn;
3106 struct server_id procid_self(void)
3108 return pid_to_procid(sys_getpid());
3111 struct server_id server_id_self(void)
3113 return procid_self();
3116 BOOL procid_equal(const struct server_id *p1, const struct server_id *p2)
3118 if (p1->pid != p2->pid)
3120 #ifdef CLUSTER_SUPPORT
3121 if (p1->vnn != p2->vnn)
3127 BOOL cluster_id_equal(const struct server_id *id1,
3128 const struct server_id *id2)
3130 return procid_equal(id1, id2);
3133 BOOL procid_is_me(const struct server_id *pid)
3135 if (pid->pid != sys_getpid())
3137 #ifdef CLUSTER_SUPPORT
3138 if (pid->vnn != my_vnn)
3144 struct server_id interpret_pid(const char *pid_string)
3146 #ifdef CLUSTER_SUPPORT
3147 unsigned int vnn, pid;
3148 struct server_id result;
3149 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3153 else if (sscanf(pid_string, "%u", &pid) == 1) {
3154 result.vnn = NONCLUSTER_VNN;
3158 result.vnn = NONCLUSTER_VNN;
3163 return pid_to_procid(atoi(pid_string));
3167 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3170 #ifdef CLUSTER_SUPPORT
3171 if (pid->vnn == NONCLUSTER_VNN) {
3172 fstr_sprintf(str, "%d", (int)pid->pid);
3175 fstr_sprintf(str, "%u:%d", (unsigned)pid->vnn, (int)pid->pid);
3178 fstr_sprintf(str, "%d", (int)pid->pid);
3180 return talloc_strdup(mem_ctx, str);
3183 char *procid_str_static(const struct server_id *pid)
3185 return procid_str(talloc_tos(), pid);
3188 BOOL procid_valid(const struct server_id *pid)
3190 return (pid->pid != -1);
3193 BOOL procid_is_local(const struct server_id *pid)
3195 #ifdef CLUSTER_SUPPORT
3196 return pid->vnn == my_vnn;
3202 int this_is_smp(void)
3204 #if defined(HAVE_SYSCONF)
3206 #if defined(SYSCONF_SC_NPROC_ONLN)
3207 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3208 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3209 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3219 /****************************************************************
3220 Check if an offset into a buffer is safe.
3221 If this returns True it's safe to indirect into the byte at
3223 ****************************************************************/
3225 BOOL is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3227 const char *end_base = buf_base + buf_len;
3228 char *end_ptr = ptr + off;
3230 if (!buf_base || !ptr) {
3234 if (end_base < buf_base || end_ptr < ptr) {
3235 return False; /* wrap. */
3238 if (end_ptr < end_base) {
3244 /****************************************************************
3245 Return a safe pointer into a buffer, or NULL.
3246 ****************************************************************/
3248 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3250 return is_offset_safe(buf_base, buf_len, ptr, off) ?
3254 /****************************************************************
3255 Return a safe pointer into a string within a buffer, or NULL.
3256 ****************************************************************/
3258 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3260 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3263 /* Check if a valid string exists at this offset. */
3264 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3270 /****************************************************************
3271 Return an SVAL at a pointer, or failval if beyond the end.
3272 ****************************************************************/
3274 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3277 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3280 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3283 return SVAL(ptr,off);
3286 /****************************************************************
3287 Return an IVAL at a pointer, or failval if beyond the end.
3288 ****************************************************************/
3290 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3293 * Note we use off+3 here, not off+4 as IVAL accesses
3294 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3296 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3299 return IVAL(ptr,off);
3304 Disable these now we have checked all code paths and ensured
3305 NULL returns on zero request. JRA.
3307 /****************************************************************
3308 talloc wrapper functions that guarentee a null pointer return
3310 ****************************************************************/
3312 #ifndef MAX_TALLOC_SIZE
3313 #define MAX_TALLOC_SIZE 0x10000000
3317 * talloc and zero memory.
3318 * - returns NULL if size is zero.
3321 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3329 p = talloc_named_const(ctx, size, name);
3332 memset(p, '\0', size);
3339 * memdup with a talloc.
3340 * - returns NULL if size is zero.
3343 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3351 newp = talloc_named_const(t, size, name);
3353 memcpy(newp, p, size);
3360 * alloc an array, checking for integer overflow in the array size.
3361 * - returns NULL if count or el_size are zero.
3364 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3366 if (count >= MAX_TALLOC_SIZE/el_size) {
3370 if (el_size == 0 || count == 0) {
3374 return talloc_named_const(ctx, el_size * count, name);
3378 * alloc an zero array, checking for integer overflow in the array size
3379 * - returns NULL if count or el_size are zero.
3382 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3384 if (count >= MAX_TALLOC_SIZE/el_size) {
3388 if (el_size == 0 || count == 0) {
3392 return _talloc_zero(ctx, el_size * count, name);
3396 * Talloc wrapper that returns NULL if size == 0.
3398 void *talloc_zeronull(const void *context, size_t size, const char *name)
3403 return talloc_named_const(context, size, name);