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);
1285 /****************************************************************************
1286 Interpret a protocol description string, with a default.
1287 ****************************************************************************/
1289 int interpret_protocol(const char *str,int def)
1291 if (strequal(str,"NT1"))
1292 return(PROTOCOL_NT1);
1293 if (strequal(str,"LANMAN2"))
1294 return(PROTOCOL_LANMAN2);
1295 if (strequal(str,"LANMAN1"))
1296 return(PROTOCOL_LANMAN1);
1297 if (strequal(str,"CORE"))
1298 return(PROTOCOL_CORE);
1299 if (strequal(str,"COREPLUS"))
1300 return(PROTOCOL_COREPLUS);
1301 if (strequal(str,"CORE+"))
1302 return(PROTOCOL_COREPLUS);
1304 DEBUG(0,("Unrecognised protocol level %s\n",str));
1309 /****************************************************************************
1310 Return true if a string could be a pure IP address.
1311 ****************************************************************************/
1313 BOOL is_ipaddress(const char *str)
1315 BOOL pure_address = True;
1318 for (i=0; pure_address && str[i]; i++)
1319 if (!(isdigit((int)str[i]) || str[i] == '.'))
1320 pure_address = False;
1322 /* Check that a pure number is not misinterpreted as an IP */
1323 pure_address = pure_address && (strchr_m(str, '.') != NULL);
1325 return pure_address;
1328 /****************************************************************************
1329 Interpret an internet address or name into an IP address in 4 byte form.
1330 ****************************************************************************/
1332 uint32 interpret_addr(const char *str)
1337 if (strcmp(str,"0.0.0.0") == 0)
1339 if (strcmp(str,"255.255.255.255") == 0)
1342 /* if it's in the form of an IP address then get the lib to interpret it */
1343 if (is_ipaddress(str)) {
1344 res = inet_addr(str);
1346 /* otherwise assume it's a network name of some sort and use
1347 sys_gethostbyname */
1348 if ((hp = sys_gethostbyname(str)) == 0) {
1349 DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
1353 if(hp->h_addr == NULL) {
1354 DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
1357 putip((char *)&res,(char *)hp->h_addr);
1360 if (res == (uint32)-1)
1366 /*******************************************************************
1367 A convenient addition to interpret_addr().
1368 ******************************************************************/
1370 struct in_addr *interpret_addr2(const char *str)
1372 static struct in_addr ret;
1373 uint32 a = interpret_addr(str);
1378 /*******************************************************************
1379 Check if an IP is the 0.0.0.0.
1380 ******************************************************************/
1382 BOOL is_zero_ip(struct in_addr ip)
1385 putip((char *)&a,(char *)&ip);
1389 /*******************************************************************
1390 Set an IP to 0.0.0.0.
1391 ******************************************************************/
1393 void zero_ip(struct in_addr *ip)
1396 static struct in_addr ipzero;
1399 ipzero = *interpret_addr2("0.0.0.0");
1406 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1407 /******************************************************************
1408 Remove any mount options such as -rsize=2048,wsize=2048 etc.
1409 Based on a fix from <Thomas.Hepper@icem.de>.
1410 *******************************************************************/
1412 static void strip_mount_options( pstring *str)
1416 while(*p && !isspace(*p))
1418 while(*p && isspace(*p))
1423 pstrcpy(tmp_str, p);
1424 pstrcpy(*str, tmp_str);
1429 /*******************************************************************
1430 Patch from jkf@soton.ac.uk
1431 Split Luke's automount_server into YP lookup and string splitter
1432 so can easily implement automount_path().
1433 As we may end up doing both, cache the last YP result.
1434 *******************************************************************/
1436 #ifdef WITH_NISPLUS_HOME
1437 char *automount_lookup(const char *user_name)
1439 static fstring last_key = "";
1440 static pstring last_value = "";
1442 char *nis_map = (char *)lp_nis_home_map_name();
1444 char buffer[NIS_MAXATTRVAL + 1];
1449 if (strcmp(user_name, last_key)) {
1450 slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
1451 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1453 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1454 if (result->status != NIS_SUCCESS) {
1455 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1456 fstrcpy(last_key, ""); pstrcpy(last_value, "");
1458 object = result->objects.objects_val;
1459 if (object->zo_data.zo_type == ENTRY_OBJ) {
1460 entry = &object->zo_data.objdata_u.en_data;
1461 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1462 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1464 pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1465 pstring_sub(last_value, "&", user_name);
1466 fstrcpy(last_key, user_name);
1470 nis_freeresult(result);
1473 strip_mount_options(&last_value);
1475 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
1478 #else /* WITH_NISPLUS_HOME */
1480 char *automount_lookup(const char *user_name)
1482 static fstring last_key = "";
1483 static pstring last_value = "";
1485 int nis_error; /* returned by yp all functions */
1486 char *nis_result; /* yp_match inits this */
1487 int nis_result_len; /* and set this */
1488 char *nis_domain; /* yp_get_default_domain inits this */
1489 char *nis_map = (char *)lp_nis_home_map_name();
1491 if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1492 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1496 DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1498 if (!strcmp(user_name, last_key)) {
1499 nis_result = last_value;
1500 nis_result_len = strlen(last_value);
1503 if ((nis_error = yp_match(nis_domain, nis_map, user_name, strlen(user_name),
1504 &nis_result, &nis_result_len)) == 0) {
1505 fstrcpy(last_key, user_name);
1506 pstrcpy(last_value, nis_result);
1507 strip_mount_options(&last_value);
1509 } else if(nis_error == YPERR_KEY) {
1511 /* If Key lookup fails user home server is not in nis_map
1512 use default information for server, and home directory */
1514 DEBUG(3, ("YP Key not found: while looking up \"%s\" in map \"%s\"\n",
1515 user_name, nis_map));
1516 DEBUG(3, ("using defaults for server and home directory\n"));
1518 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1519 yperr_string(nis_error), user_name, nis_map));
1523 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
1526 #endif /* WITH_NISPLUS_HOME */
1529 /*******************************************************************
1530 Are two IPs on the same subnet?
1531 ********************************************************************/
1533 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
1535 uint32 net1,net2,nmask;
1537 nmask = ntohl(mask.s_addr);
1538 net1 = ntohl(ip1.s_addr);
1539 net2 = ntohl(ip2.s_addr);
1541 return((net1 & nmask) == (net2 & nmask));
1545 /****************************************************************************
1546 Check if a process exists. Does this work on all unixes?
1547 ****************************************************************************/
1549 BOOL process_exists(const struct server_id pid)
1551 if (procid_is_me(&pid)) {
1555 if (procid_is_local(&pid)) {
1556 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1559 #ifdef CLUSTER_SUPPORT
1560 return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1567 BOOL process_exists_by_pid(pid_t pid)
1569 /* Doing kill with a non-positive pid causes messages to be
1570 * sent to places we don't want. */
1571 SMB_ASSERT(pid > 0);
1572 return(kill(pid,0) == 0 || errno != ESRCH);
1575 /*******************************************************************
1576 Convert a uid into a user name.
1577 ********************************************************************/
1579 const char *uidtoname(uid_t uid)
1582 struct passwd *pass;
1584 pass = getpwuid_alloc(talloc_tos(), uid);
1586 fstrcpy(name, pass->pw_name);
1589 slprintf(name, sizeof(name) - 1, "%ld",(long int)uid);
1591 return talloc_strdup(talloc_tos(), name);
1595 /*******************************************************************
1596 Convert a gid into a group name.
1597 ********************************************************************/
1599 char *gidtoname(gid_t gid)
1604 grp = getgrgid(gid);
1606 fstrcpy(name, grp->gr_name);
1609 slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1611 return talloc_strdup(talloc_tos(), name);
1614 /*******************************************************************
1615 Convert a user name into a uid.
1616 ********************************************************************/
1618 uid_t nametouid(const char *name)
1620 struct passwd *pass;
1624 pass = getpwnam_alloc(NULL, name);
1631 u = (uid_t)strtol(name, &p, 0);
1632 if ((p != name) && (*p == '\0'))
1638 /*******************************************************************
1639 Convert a name to a gid_t if possible. Return -1 if not a group.
1640 ********************************************************************/
1642 gid_t nametogid(const char *name)
1648 g = (gid_t)strtol(name, &p, 0);
1649 if ((p != name) && (*p == '\0'))
1652 grp = sys_getgrnam(name);
1654 return(grp->gr_gid);
1658 /*******************************************************************
1659 Something really nasty happened - panic !
1660 ********************************************************************/
1662 void smb_panic(const char *const why)
1670 if (global_clobber_region_function) {
1671 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1672 global_clobber_region_function,
1673 global_clobber_region_line));
1678 DEBUG(0,("PANIC (pid %llu): %s\n",
1679 (unsigned long long)sys_getpid(), why));
1682 cmd = lp_panic_action();
1684 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1685 result = system(cmd);
1688 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1691 DEBUG(0, ("smb_panic(): action returned status %d\n",
1692 WEXITSTATUS(result)));
1698 /*******************************************************************
1699 Print a backtrace of the stack to the debug log. This function
1700 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1701 exit shortly after calling it.
1702 ********************************************************************/
1704 #ifdef HAVE_LIBUNWIND_H
1705 #include <libunwind.h>
1708 #ifdef HAVE_EXECINFO_H
1709 #include <execinfo.h>
1712 #ifdef HAVE_LIBEXC_H
1716 void log_stack_trace(void)
1718 #ifdef HAVE_LIBUNWIND
1719 /* Try to use libunwind before any other technique since on ia64
1720 * libunwind correctly walks the stack in more circumstances than
1723 unw_cursor_t cursor;
1728 unw_word_t ip, sp, off;
1730 procname[sizeof(procname) - 1] = '\0';
1732 if (unw_getcontext(&uc) != 0) {
1733 goto libunwind_failed;
1736 if (unw_init_local(&cursor, &uc) != 0) {
1737 goto libunwind_failed;
1740 DEBUG(0, ("BACKTRACE:\n"));
1744 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1745 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1747 switch (unw_get_proc_name(&cursor,
1748 procname, sizeof(procname) - 1, &off) ) {
1752 /* Name truncated. */
1753 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1754 i, procname, (long long)off,
1755 (long long)ip, (long long) sp));
1758 /* case -UNW_ENOINFO: */
1759 /* case -UNW_EUNSPEC: */
1760 /* No symbol name found. */
1761 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1762 i, "<unknown symbol>",
1763 (long long)ip, (long long) sp));
1766 } while (unw_step(&cursor) > 0);
1771 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1773 #elif HAVE_BACKTRACE_SYMBOLS
1774 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1775 size_t backtrace_size;
1776 char **backtrace_strings;
1778 /* get the backtrace (stack frames) */
1779 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1780 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1782 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1783 (unsigned long)backtrace_size));
1785 if (backtrace_strings) {
1788 for (i = 0; i < backtrace_size; i++)
1789 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1791 /* Leak the backtrace_strings, rather than risk what free() might do */
1796 /* The IRIX libexc library provides an API for unwinding the stack. See
1797 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1798 * since we are about to abort anyway, it hardly matters.
1801 #define NAMESIZE 32 /* Arbitrary */
1803 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1804 char * names[BACKTRACE_STACK_SIZE];
1805 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1812 ZERO_ARRAY(namebuf);
1814 /* We need to be root so we can open our /proc entry to walk
1815 * our stack. It also helps when we want to dump core.
1819 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1820 names[i] = namebuf + (i * NAMESIZE);
1823 levels = trace_back_stack(0, addrs, names,
1824 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1826 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1827 for (i = 0; i < levels; i++) {
1828 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1833 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1837 /*******************************************************************
1838 A readdir wrapper which just returns the file name.
1839 ********************************************************************/
1841 const char *readdirname(SMB_STRUCT_DIR *p)
1843 SMB_STRUCT_DIRENT *ptr;
1849 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1853 dname = ptr->d_name;
1860 #ifdef HAVE_BROKEN_READDIR_NAME
1861 /* using /usr/ucb/cc is BAD */
1865 return talloc_strdup(talloc_tos(), dname);
1868 /*******************************************************************
1869 Utility function used to decide if the last component
1870 of a path matches a (possibly wildcarded) entry in a namelist.
1871 ********************************************************************/
1873 BOOL is_in_path(const char *name, name_compare_entry *namelist, BOOL case_sensitive)
1875 const char *last_component;
1877 /* if we have no list it's obviously not in the path */
1878 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1882 DEBUG(8, ("is_in_path: %s\n", name));
1884 /* Get the last component of the unix name. */
1885 last_component = strrchr_m(name, '/');
1886 if (!last_component) {
1887 last_component = name;
1889 last_component++; /* Go past '/' */
1892 for(; namelist->name != NULL; namelist++) {
1893 if(namelist->is_wild) {
1894 if (mask_match(last_component, namelist->name, case_sensitive)) {
1895 DEBUG(8,("is_in_path: mask match succeeded\n"));
1899 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1900 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1901 DEBUG(8,("is_in_path: match succeeded\n"));
1906 DEBUG(8,("is_in_path: match not found\n"));
1910 /*******************************************************************
1911 Strip a '/' separated list into an array of
1912 name_compare_enties structures suitable for
1913 passing to is_in_path(). We do this for
1914 speed so we can pre-parse all the names in the list
1915 and don't do it for each call to is_in_path().
1916 namelist is modified here and is assumed to be
1917 a copy owned by the caller.
1918 We also check if the entry contains a wildcard to
1919 remove a potentially expensive call to mask_match
1921 ********************************************************************/
1923 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1926 char *nameptr = namelist;
1927 int num_entries = 0;
1930 (*ppname_array) = NULL;
1932 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1935 /* We need to make two passes over the string. The
1936 first to count the number of elements, the second
1941 if ( *nameptr == '/' ) {
1942 /* cope with multiple (useless) /s) */
1946 /* find the next / */
1947 name_end = strchr_m(nameptr, '/');
1949 /* oops - the last check for a / didn't find one. */
1950 if (name_end == NULL)
1953 /* next segment please */
1954 nameptr = name_end + 1;
1958 if(num_entries == 0)
1961 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1962 DEBUG(0,("set_namearray: malloc fail\n"));
1966 /* Now copy out the names */
1970 if ( *nameptr == '/' ) {
1971 /* cope with multiple (useless) /s) */
1975 /* find the next / */
1976 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1979 /* oops - the last check for a / didn't find one. */
1980 if(name_end == NULL)
1983 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1984 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1985 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1989 /* next segment please */
1990 nameptr = name_end + 1;
1994 (*ppname_array)[i].name = NULL;
1999 /****************************************************************************
2000 Routine to free a namearray.
2001 ****************************************************************************/
2003 void free_namearray(name_compare_entry *name_array)
2007 if(name_array == NULL)
2010 for(i=0; name_array[i].name!=NULL; i++)
2011 SAFE_FREE(name_array[i].name);
2012 SAFE_FREE(name_array);
2016 #define DBGC_CLASS DBGC_LOCKING
2018 /****************************************************************************
2019 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
2020 is dealt with in posix.c
2021 Returns True if the lock was granted, False otherwise.
2022 ****************************************************************************/
2024 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
2026 SMB_STRUCT_FLOCK lock;
2029 DEBUG(8,("fcntl_lock fd=%d op=%d offset=%.0f count=%.0f type=%d\n",
2030 fd,op,(double)offset,(double)count,type));
2033 lock.l_whence = SEEK_SET;
2034 lock.l_start = offset;
2038 ret = sys_fcntl_ptr(fd,op,&lock);
2042 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
2043 (double)offset,(double)count,op,type,strerror(errno)));
2048 /* everything went OK */
2049 DEBUG(8,("fcntl_lock: Lock call successful\n"));
2054 /****************************************************************************
2055 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
2056 is dealt with in posix.c
2057 Returns True if we have information regarding this lock region (and returns
2058 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
2059 ****************************************************************************/
2061 BOOL fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
2063 SMB_STRUCT_FLOCK lock;
2066 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
2067 fd,(double)*poffset,(double)*pcount,*ptype));
2069 lock.l_type = *ptype;
2070 lock.l_whence = SEEK_SET;
2071 lock.l_start = *poffset;
2072 lock.l_len = *pcount;
2075 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
2079 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
2080 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
2085 *ptype = lock.l_type;
2086 *poffset = lock.l_start;
2087 *pcount = lock.l_len;
2090 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
2091 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
2096 #define DBGC_CLASS DBGC_ALL
2098 /*******************************************************************
2099 Is the name specified one of my netbios names.
2100 Returns true if it is equal, false otherwise.
2101 ********************************************************************/
2103 BOOL is_myname(const char *s)
2108 for (n=0; my_netbios_names(n); n++) {
2109 if (strequal(my_netbios_names(n), s)) {
2114 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
2118 BOOL is_myname_or_ipaddr(const char *s)
2120 fstring name, dnsname;
2126 /* santize the string from '\\name' */
2130 servername = strrchr_m( name, '\\' );
2136 /* optimize for the common case */
2138 if (strequal(servername, global_myname()))
2141 /* check for an alias */
2143 if (is_myname(servername))
2146 /* check for loopback */
2148 if (strequal(servername, "127.0.0.1"))
2151 if (strequal(servername, "localhost"))
2154 /* maybe it's my dns name */
2156 if ( get_mydnsfullname( dnsname ) )
2157 if ( strequal( servername, dnsname ) )
2160 /* handle possible CNAME records */
2162 if ( !is_ipaddress( servername ) ) {
2163 /* use DNS to resolve the name, but only the first address */
2166 if (((hp = sys_gethostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
2167 struct in_addr return_ip;
2168 putip( (char*)&return_ip, (char*)hp->h_addr );
2169 fstrcpy( name, inet_ntoa( return_ip ) );
2174 /* maybe its an IP address? */
2175 if (is_ipaddress(servername)) {
2176 struct iface_struct nics[MAX_INTERFACES];
2180 ip = interpret_addr(servername);
2181 if ((ip==0) || (ip==0xffffffff))
2184 n = get_interfaces(nics, MAX_INTERFACES);
2185 for (i=0; i<n; i++) {
2186 if (ip == nics[i].ip.s_addr)
2195 /*******************************************************************
2196 Is the name specified our workgroup/domain.
2197 Returns true if it is equal, false otherwise.
2198 ********************************************************************/
2200 BOOL is_myworkgroup(const char *s)
2204 if (strequal(s, lp_workgroup())) {
2208 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
2212 /*******************************************************************
2213 we distinguish between 2K and XP by the "Native Lan Manager" string
2214 WinXP => "Windows 2002 5.1"
2215 WinXP 64bit => "Windows XP 5.2"
2216 Win2k => "Windows 2000 5.0"
2217 NT4 => "Windows NT 4.0"
2218 Win9x => "Windows 4.0"
2219 Windows 2003 doesn't set the native lan manager string but
2220 they do set the domain to "Windows 2003 5.2" (probably a bug).
2221 ********************************************************************/
2223 void ra_lanman_string( const char *native_lanman )
2225 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
2226 set_remote_arch( RA_WINXP );
2227 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
2228 set_remote_arch( RA_WINXP );
2229 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
2230 set_remote_arch( RA_WIN2K3 );
2233 /*******************************************************************
2234 Set the horrid remote_arch string based on an enum.
2235 ********************************************************************/
2237 void set_remote_arch(enum remote_arch_types type)
2242 fstrcpy(remote_arch, "WfWg");
2245 fstrcpy(remote_arch, "OS2");
2248 fstrcpy(remote_arch, "Win95");
2251 fstrcpy(remote_arch, "WinNT");
2254 fstrcpy(remote_arch, "Win2K");
2257 fstrcpy(remote_arch, "WinXP");
2260 fstrcpy(remote_arch, "Win2K3");
2263 fstrcpy(remote_arch, "Vista");
2266 fstrcpy(remote_arch,"Samba");
2269 fstrcpy(remote_arch,"CIFSFS");
2272 ra_type = RA_UNKNOWN;
2273 fstrcpy(remote_arch, "UNKNOWN");
2277 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n", remote_arch));
2280 /*******************************************************************
2281 Get the remote_arch type.
2282 ********************************************************************/
2284 enum remote_arch_types get_remote_arch(void)
2289 void print_asc(int level, const unsigned char *buf,int len)
2293 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
2296 void dump_data(int level, const unsigned char *buf,int len)
2301 if (!DEBUGLVL(level)) return;
2303 DEBUGADD(level,("[%03X] ",i));
2305 DEBUGADD(level,("%02X ",(int)buf[i]));
2307 if (i%8 == 0) DEBUGADD(level,(" "));
2309 print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
2310 print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
2311 if (i<len) DEBUGADD(level,("[%03X] ",i));
2317 DEBUGADD(level,(" "));
2318 if (n>8) DEBUGADD(level,(" "));
2319 while (n--) DEBUGADD(level,(" "));
2321 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2323 if (n>0) print_asc(level,&buf[i-n],n);
2324 DEBUGADD(level,("\n"));
2328 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2330 #ifdef DEBUG_PASSWORD
2331 DEBUG(11, ("%s", msg));
2332 if (data != NULL && len > 0)
2334 dump_data(11, data, len);
2339 char *tab_depth(int depth)
2341 static pstring spaces;
2342 memset(spaces, ' ', depth * 4);
2343 spaces[depth * 4] = 0;
2347 /*****************************************************************************
2348 Provide a checksum on a string
2350 Input: s - the null-terminated character string for which the checksum
2353 Output: The checksum value calculated for s.
2354 *****************************************************************************/
2356 int str_checksum(const char *s)
2364 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2371 /*****************************************************************
2372 Zero a memory area then free it. Used to catch bugs faster.
2373 *****************************************************************/
2375 void zero_free(void *p, size_t size)
2381 /*****************************************************************
2382 Set our open file limit to a requested max and return the limit.
2383 *****************************************************************/
2385 int set_maxfiles(int requested_max)
2387 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2389 int saved_current_limit;
2391 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2392 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2395 return requested_max;
2399 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2400 * account for the extra fd we need
2401 * as well as the log files and standard
2402 * handles etc. Save the limit we want to set in case
2403 * we are running on an OS that doesn't support this limit (AIX)
2404 * which always returns RLIM_INFINITY for rlp.rlim_max.
2407 /* Try raising the hard (max) limit to the requested amount. */
2409 #if defined(RLIM_INFINITY)
2410 if (rlp.rlim_max != RLIM_INFINITY) {
2411 int orig_max = rlp.rlim_max;
2413 if ( rlp.rlim_max < requested_max )
2414 rlp.rlim_max = requested_max;
2416 /* This failing is not an error - many systems (Linux) don't
2417 support our default request of 10,000 open files. JRA. */
2419 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2420 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2421 (int)rlp.rlim_max, strerror(errno) ));
2423 /* Set failed - restore original value from get. */
2424 rlp.rlim_max = orig_max;
2429 /* Now try setting the soft (current) limit. */
2431 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2433 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2434 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2435 (int)rlp.rlim_cur, strerror(errno) ));
2437 return saved_current_limit;
2440 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2441 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2444 return saved_current_limit;
2447 #if defined(RLIM_INFINITY)
2448 if(rlp.rlim_cur == RLIM_INFINITY)
2449 return saved_current_limit;
2452 if((int)rlp.rlim_cur > saved_current_limit)
2453 return saved_current_limit;
2455 return rlp.rlim_cur;
2456 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2458 * No way to know - just guess...
2460 return requested_max;
2464 /*****************************************************************
2465 Possibly replace mkstemp if it is broken.
2466 *****************************************************************/
2468 int smb_mkstemp(char *name_template)
2470 #if HAVE_SECURE_MKSTEMP
2471 return mkstemp(name_template);
2473 /* have a reasonable go at emulating it. Hope that
2474 the system mktemp() isn't completly hopeless */
2475 char *p = mktemp(name_template);
2478 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2482 /*****************************************************************
2483 malloc that aborts with smb_panic on fail or zero size.
2484 *****************************************************************/
2486 void *smb_xmalloc_array(size_t size, unsigned int count)
2490 smb_panic("smb_xmalloc_array: called with zero size");
2492 if (count >= MAX_ALLOC_SIZE/size) {
2493 smb_panic("smb_xmalloc_array: alloc size too large");
2495 if ((p = SMB_MALLOC(size*count)) == NULL) {
2496 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2497 (unsigned long)size, (unsigned long)count));
2498 smb_panic("smb_xmalloc_array: malloc failed");
2504 Memdup with smb_panic on fail.
2507 void *smb_xmemdup(const void *p, size_t size)
2510 p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2511 memcpy(p2, p, size);
2516 strdup that aborts on malloc fail.
2519 char *smb_xstrdup(const char *s)
2521 #if defined(PARANOID_MALLOC_CHECKER)
2528 #define strdup rep_strdup
2531 char *s1 = strdup(s);
2532 #if defined(PARANOID_MALLOC_CHECKER)
2536 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2539 smb_panic("smb_xstrdup: malloc failed");
2546 strndup that aborts on malloc fail.
2549 char *smb_xstrndup(const char *s, size_t n)
2551 #if defined(PARANOID_MALLOC_CHECKER)
2557 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
2559 #define strndup rep_strndup
2562 char *s1 = strndup(s, n);
2563 #if defined(PARANOID_MALLOC_CHECKER)
2567 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2570 smb_panic("smb_xstrndup: malloc failed");
2576 vasprintf that aborts on malloc fail
2579 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2586 n = vasprintf(ptr, format, ap2);
2587 if (n == -1 || ! *ptr) {
2588 smb_panic("smb_xvasprintf: out of memory");
2593 /*****************************************************************
2594 Like strdup but for memory.
2595 *****************************************************************/
2597 void *memdup(const void *p, size_t size)
2602 p2 = SMB_MALLOC(size);
2605 memcpy(p2, p, size);
2609 /*****************************************************************
2610 Get local hostname and cache result.
2611 *****************************************************************/
2613 char *myhostname(void)
2621 /*****************************************************************
2622 A useful function for returning a path in the Samba lock directory.
2623 *****************************************************************/
2625 char *lock_path(const char *name)
2629 pstrcpy(fname,lp_lockdir());
2630 trim_char(fname,'\0','/');
2632 if (!directory_exist(fname,NULL))
2636 pstrcat(fname,name);
2638 return talloc_strdup(talloc_tos(), fname);
2641 /*****************************************************************
2642 A useful function for returning a path in the Samba pid directory.
2643 *****************************************************************/
2645 char *pid_path(const char *name)
2649 pstrcpy(fname,lp_piddir());
2650 trim_char(fname,'\0','/');
2652 if (!directory_exist(fname,NULL))
2656 pstrcat(fname,name);
2658 return talloc_strdup(talloc_tos(), fname);
2662 * @brief Returns an absolute path to a file in the Samba lib directory.
2664 * @param name File to find, relative to LIBDIR.
2666 * @retval Pointer to a static #pstring containing the full path.
2669 char *lib_path(const char *name)
2671 return talloc_asprintf(talloc_tos(), "%s/%s", dyn_LIBDIR, name);
2675 * @brief Returns the platform specific shared library extension.
2677 * @retval Pointer to a static #fstring containing the extension.
2680 const char *shlib_ext(void)
2682 return dyn_SHLIBEXT;
2685 /*******************************************************************
2686 Given a filename - get its directory name
2687 NB: Returned in static storage. Caveats:
2688 o If caller wishes to preserve, they should copy.
2689 ********************************************************************/
2691 char *parent_dirname(const char *path)
2695 if (!parent_dirname_talloc(talloc_tos(), path, &parent, NULL)) {
2702 BOOL parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2703 char **parent, const char **name)
2708 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2711 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2722 if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2725 memcpy(*parent, dir, len);
2726 (*parent)[len] = '\0';
2734 /*******************************************************************
2735 Determine if a pattern contains any Microsoft wildcard characters.
2736 *******************************************************************/
2738 BOOL ms_has_wild(const char *s)
2742 if (lp_posix_pathnames()) {
2743 /* With posix pathnames no characters are wild. */
2747 while ((c = *s++)) {
2760 BOOL ms_has_wild_w(const smb_ucs2_t *s)
2763 if (!s) return False;
2764 while ((c = *s++)) {
2766 case UCS2_CHAR('*'):
2767 case UCS2_CHAR('?'):
2768 case UCS2_CHAR('<'):
2769 case UCS2_CHAR('>'):
2770 case UCS2_CHAR('"'):
2777 /*******************************************************************
2778 A wrapper that handles case sensitivity and the special handling
2780 *******************************************************************/
2782 BOOL mask_match(const char *string, const char *pattern, BOOL is_case_sensitive)
2784 if (strcmp(string,"..") == 0)
2786 if (strcmp(pattern,".") == 0)
2789 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2792 /*******************************************************************
2793 A wrapper that handles case sensitivity and the special handling
2794 of the ".." name. Varient that is only called by old search code which requires
2795 pattern translation.
2796 *******************************************************************/
2798 BOOL mask_match_search(const char *string, const char *pattern, BOOL is_case_sensitive)
2800 if (strcmp(string,"..") == 0)
2802 if (strcmp(pattern,".") == 0)
2805 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2808 /*******************************************************************
2809 A wrapper that handles a list of patters and calls mask_match()
2810 on each. Returns True if any of the patterns match.
2811 *******************************************************************/
2813 BOOL mask_match_list(const char *string, char **list, int listLen, BOOL is_case_sensitive)
2815 while (listLen-- > 0) {
2816 if (mask_match(string, *list++, is_case_sensitive))
2822 /*********************************************************
2823 Recursive routine that is called by unix_wild_match.
2824 *********************************************************/
2826 static BOOL unix_do_match(const char *regexp, const char *str)
2830 for( p = regexp; *p && *str; ) {
2841 * Look for a character matching
2842 * the one after the '*'.
2846 return True; /* Automatic match */
2849 while(*str && (*p != *str))
2853 * Patch from weidel@multichart.de. In the case of the regexp
2854 * '*XX*' we want to ensure there are at least 2 'X' characters
2855 * in the string after the '*' for a match to be made.
2862 * Eat all the characters that match, but count how many there were.
2865 while(*str && (*p == *str)) {
2871 * Now check that if the regexp had n identical characters that
2872 * matchcount had at least that many matches.
2875 while ( *(p+1) && (*(p+1) == *p)) {
2880 if ( matchcount <= 0 )
2884 str--; /* We've eaten the match char after the '*' */
2886 if(unix_do_match(p, str))
2908 if (!*p && str[0] == '.' && str[1] == 0)
2911 if (!*str && *p == '?') {
2917 if(!*str && (*p == '*' && p[1] == '\0'))
2923 /*******************************************************************
2924 Simple case insensitive interface to a UNIX wildcard matcher.
2925 Returns True if match, False if not.
2926 *******************************************************************/
2928 BOOL unix_wild_match(const char *pattern, const char *string)
2933 pstrcpy(p2, pattern);
2934 pstrcpy(s2, string);
2938 /* Remove any *? and ** from the pattern as they are meaningless */
2939 for(p = p2; *p; p++)
2940 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
2941 pstrcpy( &p[1], &p[2]);
2943 if (strequal(p2,"*"))
2946 return unix_do_match(p2, s2);
2949 /**********************************************************************
2950 Converts a name to a fully qualified domain name.
2951 Returns True if lookup succeeded, False if not (then fqdn is set to name)
2952 ***********************************************************************/
2954 BOOL name_to_fqdn(fstring fqdn, const char *name)
2956 struct hostent *hp = sys_gethostbyname(name);
2958 if ( hp && hp->h_name && *hp->h_name ) {
2961 /* find out if the fqdn is returned as an alias
2962 * to cope with /etc/hosts files where the first
2963 * name is not the fqdn but the short name */
2964 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2966 for (i = 0; hp->h_aliases[i]; i++) {
2967 if (strchr_m(hp->h_aliases[i], '.')) {
2968 full = hp->h_aliases[i];
2973 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2974 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2975 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2976 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2977 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
2985 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2986 fstrcpy(fqdn, full);
2989 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2990 fstrcpy(fqdn, name);
2995 /**********************************************************************
2996 Extension to talloc_get_type: Abort on type mismatch
2997 ***********************************************************************/
2999 void *talloc_check_name_abort(const void *ptr, const char *name)
3003 result = talloc_check_name(ptr, name);
3007 DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
3008 name, talloc_get_name(ptr)));
3009 smb_panic("talloc type mismatch");
3010 /* Keep the compiler happy */
3017 /*******************************************************************
3018 This routine is a trick to immediately catch errors when debugging
3019 with insure. A xterm with a gdb is popped up when insure catches
3020 a error. It is Linux specific.
3021 ********************************************************************/
3023 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
3028 /* you can get /usr/bin/backtrace from
3029 http://samba.org/ftp/unpacked/junkcode/backtrace */
3030 pstring cmd = "/usr/bin/backtrace %d";
3032 slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
3033 pstring_sub(cmd, "%d", pidstr);
3037 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
3038 fn = dlsym(h, "_Insure_trap_error");
3040 if (!h || h == _Insure_trap_error) {
3041 h = dlopen("/usr/local/parasoft/lib.linux2/libinsure.so", RTLD_LAZY);
3042 fn = dlsym(h, "_Insure_trap_error");
3046 ret = fn(a1, a2, a3, a4, a5, a6);
3054 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
3056 switch (share_access & ~FILE_SHARE_DELETE) {
3057 case FILE_SHARE_NONE:
3059 case FILE_SHARE_READ:
3061 case FILE_SHARE_WRITE:
3063 case FILE_SHARE_READ|FILE_SHARE_WRITE:
3066 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
3068 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
3075 pid_t procid_to_pid(const struct server_id *proc)
3080 static uint32 my_vnn = NONCLUSTER_VNN;
3082 void set_my_vnn(uint32 vnn)
3084 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3088 uint32 get_my_vnn(void)
3093 struct server_id pid_to_procid(pid_t pid)
3095 struct server_id result;
3097 #ifdef CLUSTER_SUPPORT
3098 result.vnn = my_vnn;
3103 struct server_id procid_self(void)
3105 return pid_to_procid(sys_getpid());
3108 struct server_id server_id_self(void)
3110 return procid_self();
3113 BOOL procid_equal(const struct server_id *p1, const struct server_id *p2)
3115 if (p1->pid != p2->pid)
3117 #ifdef CLUSTER_SUPPORT
3118 if (p1->vnn != p2->vnn)
3124 BOOL cluster_id_equal(const struct server_id *id1,
3125 const struct server_id *id2)
3127 return procid_equal(id1, id2);
3130 BOOL procid_is_me(const struct server_id *pid)
3132 if (pid->pid != sys_getpid())
3134 #ifdef CLUSTER_SUPPORT
3135 if (pid->vnn != my_vnn)
3141 struct server_id interpret_pid(const char *pid_string)
3143 #ifdef CLUSTER_SUPPORT
3144 unsigned int vnn, pid;
3145 struct server_id result;
3146 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3150 else if (sscanf(pid_string, "%u", &pid) == 1) {
3151 result.vnn = NONCLUSTER_VNN;
3155 result.vnn = NONCLUSTER_VNN;
3160 return pid_to_procid(atoi(pid_string));
3164 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3167 #ifdef CLUSTER_SUPPORT
3168 if (pid->vnn == NONCLUSTER_VNN) {
3169 fstr_sprintf(str, "%d", (int)pid->pid);
3172 fstr_sprintf(str, "%u:%d", (unsigned)pid->vnn, (int)pid->pid);
3175 fstr_sprintf(str, "%d", (int)pid->pid);
3177 return talloc_strdup(mem_ctx, str);
3180 char *procid_str_static(const struct server_id *pid)
3182 return procid_str(talloc_tos(), pid);
3185 BOOL procid_valid(const struct server_id *pid)
3187 return (pid->pid != -1);
3190 BOOL procid_is_local(const struct server_id *pid)
3192 #ifdef CLUSTER_SUPPORT
3193 return pid->vnn == my_vnn;
3199 int this_is_smp(void)
3201 #if defined(HAVE_SYSCONF)
3203 #if defined(SYSCONF_SC_NPROC_ONLN)
3204 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3205 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3206 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3216 /****************************************************************
3217 Check if an offset into a buffer is safe.
3218 If this returns True it's safe to indirect into the byte at
3220 ****************************************************************/
3222 BOOL is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3224 const char *end_base = buf_base + buf_len;
3225 char *end_ptr = ptr + off;
3227 if (!buf_base || !ptr) {
3231 if (end_base < buf_base || end_ptr < ptr) {
3232 return False; /* wrap. */
3235 if (end_ptr < end_base) {
3241 /****************************************************************
3242 Return a safe pointer into a buffer, or NULL.
3243 ****************************************************************/
3245 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3247 return is_offset_safe(buf_base, buf_len, ptr, off) ?
3251 /****************************************************************
3252 Return a safe pointer into a string within a buffer, or NULL.
3253 ****************************************************************/
3255 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3257 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3260 /* Check if a valid string exists at this offset. */
3261 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3267 /****************************************************************
3268 Return an SVAL at a pointer, or failval if beyond the end.
3269 ****************************************************************/
3271 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3274 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3277 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3280 return SVAL(ptr,off);
3283 /****************************************************************
3284 Return an IVAL at a pointer, or failval if beyond the end.
3285 ****************************************************************/
3287 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3290 * Note we use off+3 here, not off+4 as IVAL accesses
3291 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3293 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3296 return IVAL(ptr,off);
3301 Disable these now we have checked all code paths and ensured
3302 NULL returns on zero request. JRA.
3304 /****************************************************************
3305 talloc wrapper functions that guarentee a null pointer return
3307 ****************************************************************/
3309 #ifndef MAX_TALLOC_SIZE
3310 #define MAX_TALLOC_SIZE 0x10000000
3314 * talloc and zero memory.
3315 * - returns NULL if size is zero.
3318 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3326 p = talloc_named_const(ctx, size, name);
3329 memset(p, '\0', size);
3336 * memdup with a talloc.
3337 * - returns NULL if size is zero.
3340 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3348 newp = talloc_named_const(t, size, name);
3350 memcpy(newp, p, size);
3357 * alloc an array, checking for integer overflow in the array size.
3358 * - returns NULL if count or el_size are zero.
3361 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3363 if (count >= MAX_TALLOC_SIZE/el_size) {
3367 if (el_size == 0 || count == 0) {
3371 return talloc_named_const(ctx, el_size * count, name);
3375 * alloc an zero array, checking for integer overflow in the array size
3376 * - returns NULL if count or el_size are zero.
3379 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3381 if (count >= MAX_TALLOC_SIZE/el_size) {
3385 if (el_size == 0 || count == 0) {
3389 return _talloc_zero(ctx, el_size * count, name);
3393 * Talloc wrapper that returns NULL if size == 0.
3395 void *talloc_zeronull(const void *context, size_t size, const char *name)
3400 return talloc_named_const(context, size, name);