2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2002
6 Copyright (C) Simo Sorce 2001
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8 Copyright (C) James Peach 2006
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 extern fstring local_machine;
27 extern char *global_clobber_region_function;
28 extern unsigned int global_clobber_region_line;
29 extern fstring remote_arch;
31 /* Max allowable allococation - 256mb - 0x10000000 */
32 #define MAX_ALLOC_SIZE (1024*1024*256)
34 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
35 #ifdef WITH_NISPLUS_HOME
36 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
38 * The following lines are needed due to buggy include files
39 * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
40 * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
41 * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
42 * an enum in /usr/include/rpcsvc/nis.h.
49 #if defined(GROUP_OBJ)
53 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
55 #include <rpcsvc/nis.h>
57 #endif /* WITH_NISPLUS_HOME */
58 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
60 enum protocol_types Protocol = PROTOCOL_COREPLUS;
62 /* a default finfo structure to ensure all fields are sensible */
65 /* this is used by the chaining code */
70 static enum remote_arch_types ra_type = RA_UNKNOWN;
71 pstring user_socket_options=DEFAULT_SOCKET_OPTIONS;
73 /***********************************************************************
74 Definitions for all names.
75 ***********************************************************************/
77 static char *smb_myname;
78 static char *smb_myworkgroup;
79 static char *smb_scope;
80 static int smb_num_netbios_names;
81 static char **smb_my_netbios_names;
83 /***********************************************************************
84 Allocate and set myname. Ensure upper case.
85 ***********************************************************************/
87 BOOL set_global_myname(const char *myname)
89 SAFE_FREE(smb_myname);
90 smb_myname = SMB_STRDUP(myname);
93 strupper_m(smb_myname);
97 const char *global_myname(void)
102 /***********************************************************************
103 Allocate and set myworkgroup. Ensure upper case.
104 ***********************************************************************/
106 BOOL set_global_myworkgroup(const char *myworkgroup)
108 SAFE_FREE(smb_myworkgroup);
109 smb_myworkgroup = SMB_STRDUP(myworkgroup);
110 if (!smb_myworkgroup)
112 strupper_m(smb_myworkgroup);
116 const char *lp_workgroup(void)
118 return smb_myworkgroup;
121 /***********************************************************************
122 Allocate and set scope. Ensure upper case.
123 ***********************************************************************/
125 BOOL set_global_scope(const char *scope)
127 SAFE_FREE(smb_scope);
128 smb_scope = SMB_STRDUP(scope);
131 strupper_m(smb_scope);
135 /*********************************************************************
136 Ensure scope is never null string.
137 *********************************************************************/
139 const char *global_scope(void)
142 set_global_scope("");
146 static void free_netbios_names_array(void)
150 for (i = 0; i < smb_num_netbios_names; i++)
151 SAFE_FREE(smb_my_netbios_names[i]);
153 SAFE_FREE(smb_my_netbios_names);
154 smb_num_netbios_names = 0;
157 static BOOL allocate_my_netbios_names_array(size_t number)
159 free_netbios_names_array();
161 smb_num_netbios_names = number + 1;
162 smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
164 if (!smb_my_netbios_names)
167 memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
171 static BOOL set_my_netbios_names(const char *name, int i)
173 SAFE_FREE(smb_my_netbios_names[i]);
175 smb_my_netbios_names[i] = SMB_STRDUP(name);
176 if (!smb_my_netbios_names[i])
178 strupper_m(smb_my_netbios_names[i]);
182 /***********************************************************************
183 Free memory allocated to global objects
184 ***********************************************************************/
186 void gfree_names(void)
188 SAFE_FREE( smb_myname );
189 SAFE_FREE( smb_myworkgroup );
190 SAFE_FREE( smb_scope );
191 free_netbios_names_array();
194 void gfree_all( void )
203 /* release the talloc null_context memory last */
204 talloc_disable_null_tracking();
207 const char *my_netbios_names(int i)
209 return smb_my_netbios_names[i];
212 BOOL set_netbios_aliases(const char **str_array)
216 /* Work out the max number of netbios aliases that we have */
217 for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
220 if ( global_myname() && *global_myname())
223 /* Allocate space for the netbios aliases */
224 if (!allocate_my_netbios_names_array(namecount))
227 /* Use the global_myname string first */
229 if ( global_myname() && *global_myname()) {
230 set_my_netbios_names( global_myname(), namecount );
236 for ( i = 0; str_array[i] != NULL; i++) {
238 BOOL duplicate = False;
240 /* Look for duplicates */
241 for( n=0; n<namecount; n++ ) {
242 if( strequal( str_array[i], my_netbios_names(n) ) ) {
248 if (!set_my_netbios_names(str_array[i], namecount))
257 /****************************************************************************
258 Common name initialization code.
259 ****************************************************************************/
261 BOOL init_names(void)
266 if (global_myname() == NULL || *global_myname() == '\0') {
267 if (!set_global_myname(myhostname())) {
268 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
273 if (!set_netbios_aliases(lp_netbios_aliases())) {
274 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
278 fstrcpy( local_machine, global_myname() );
279 trim_char( local_machine, ' ', ' ' );
280 p = strchr( local_machine, ' ' );
283 strlower_m( local_machine );
285 DEBUG( 5, ("Netbios name list:-\n") );
286 for( n=0; my_netbios_names(n); n++ )
287 DEBUGADD( 5, ( "my_netbios_names[%d]=\"%s\"\n", n, my_netbios_names(n) ) );
292 /**************************************************************************n
293 Find a suitable temporary directory. The result should be copied immediately
294 as it may be overwritten by a subsequent call.
295 ****************************************************************************/
297 const char *tmpdir(void)
300 if ((p = getenv("TMPDIR")))
305 /****************************************************************************
306 Add a gid to an array of gids if it's not already there.
307 ****************************************************************************/
309 BOOL add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
310 gid_t **gids, size_t *num_gids)
314 if ((*num_gids != 0) && (*gids == NULL)) {
316 * A former call to this routine has failed to allocate memory
321 for (i=0; i<*num_gids; i++) {
322 if ((*gids)[i] == gid) {
327 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
333 (*gids)[*num_gids] = gid;
338 /****************************************************************************
339 Like atoi but gets the value up to the separator character.
340 ****************************************************************************/
342 static const char *Atoic(const char *p, int *n, const char *c)
344 if (!isdigit((int)*p)) {
345 DEBUG(5, ("Atoic: malformed number\n"));
351 while ((*p) && isdigit((int)*p))
354 if (strchr_m(c, *p) == NULL) {
355 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
362 /*************************************************************************
363 Reads a list of numbers.
364 *************************************************************************/
366 const char *get_numlist(const char *p, uint32 **num, int *count)
370 if (num == NULL || count == NULL)
376 while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
377 *num = SMB_REALLOC_ARRAY((*num), uint32, (*count)+1);
381 (*num)[(*count)] = val;
389 /*******************************************************************
390 Check if a file exists - call vfs_file_exist for samba files.
391 ********************************************************************/
393 BOOL file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
399 if (sys_stat(fname,sbuf) != 0)
402 return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
405 /*******************************************************************
406 Check a files mod time.
407 ********************************************************************/
409 time_t file_modtime(const char *fname)
413 if (sys_stat(fname,&st) != 0)
419 /*******************************************************************
420 Check if a directory exists.
421 ********************************************************************/
423 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
431 if (sys_stat(dname,st) != 0)
434 ret = S_ISDIR(st->st_mode);
440 /*******************************************************************
441 Returns the size in bytes of the named file.
442 ********************************************************************/
444 SMB_OFF_T get_file_size(char *file_name)
448 if(sys_stat(file_name,&buf) != 0)
449 return (SMB_OFF_T)-1;
453 /*******************************************************************
454 Return a string representing an attribute for a file.
455 ********************************************************************/
457 char *attrib_string(uint16 mode)
459 static fstring attrstr;
463 if (mode & aVOLID) fstrcat(attrstr,"V");
464 if (mode & aDIR) fstrcat(attrstr,"D");
465 if (mode & aARCH) fstrcat(attrstr,"A");
466 if (mode & aHIDDEN) fstrcat(attrstr,"H");
467 if (mode & aSYSTEM) fstrcat(attrstr,"S");
468 if (mode & aRONLY) fstrcat(attrstr,"R");
473 /*******************************************************************
474 Show a smb message structure.
475 ********************************************************************/
477 void show_msg(char *buf)
485 DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
487 (int)CVAL(buf,smb_com),
488 (int)CVAL(buf,smb_rcls),
489 (int)CVAL(buf,smb_reh),
490 (int)SVAL(buf,smb_err),
491 (int)CVAL(buf,smb_flg),
492 (int)SVAL(buf,smb_flg2)));
493 DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
494 (int)SVAL(buf,smb_tid),
495 (int)SVAL(buf,smb_pid),
496 (int)SVAL(buf,smb_uid),
497 (int)SVAL(buf,smb_mid)));
498 DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
500 for (i=0;i<(int)CVAL(buf,smb_wct);i++)
501 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
502 SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
504 bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
506 DEBUGADD(5,("smb_bcc=%d\n",bcc));
514 dump_data(10, (uint8 *)smb_buf(buf), bcc);
517 /*******************************************************************
518 Set the length and marker of an encrypted smb packet.
519 ********************************************************************/
521 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
523 _smb_setlen(buf,len);
527 SSVAL(buf,6,enc_ctx_num);
530 /*******************************************************************
531 Set the length and marker of an smb packet.
532 ********************************************************************/
534 void smb_setlen(const char *frombuf, char *buf, int len)
536 _smb_setlen(buf,len);
539 if (buf != frombuf) {
540 memcpy(buf+4, frombuf+4, 4);
550 /*******************************************************************
551 Setup the word count and byte count for a smb message.
552 ********************************************************************/
554 int set_message(const char *frombuf, char *buf,int num_words,int num_bytes,BOOL zero)
556 if (zero && (num_words || num_bytes)) {
557 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
559 SCVAL(buf,smb_wct,num_words);
560 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
561 smb_setlen(frombuf, buf,smb_size + num_words*2 + num_bytes - 4);
562 return (smb_size + num_words*2 + num_bytes);
565 /*******************************************************************
566 Setup only the byte count for a smb message.
567 ********************************************************************/
569 int set_message_bcc(const char *frombuf, char *buf,int num_bytes)
571 int num_words = CVAL(buf,smb_wct);
572 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
573 smb_setlen(frombuf, buf,smb_size + num_words*2 + num_bytes - 4);
574 return (smb_size + num_words*2 + num_bytes);
577 /*******************************************************************
578 Setup only the byte count for a smb message, using the end of the
580 ********************************************************************/
582 int set_message_end(const char *frombuf, void *outbuf,void *end_ptr)
584 return set_message_bcc(frombuf,
586 PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
589 /*******************************************************************
590 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)
1581 static fstring name;
1582 struct passwd *pass;
1584 pass = getpwuid_alloc(NULL, uid);
1586 fstrcpy(name, pass->pw_name);
1589 slprintf(name, sizeof(name) - 1, "%ld",(long int)uid);
1595 /*******************************************************************
1596 Convert a gid into a group name.
1597 ********************************************************************/
1599 char *gidtoname(gid_t gid)
1601 static fstring name;
1604 grp = getgrgid(gid);
1606 return(grp->gr_name);
1607 slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1611 /*******************************************************************
1612 Convert a user name into a uid.
1613 ********************************************************************/
1615 uid_t nametouid(const char *name)
1617 struct passwd *pass;
1621 pass = getpwnam_alloc(NULL, name);
1628 u = (uid_t)strtol(name, &p, 0);
1629 if ((p != name) && (*p == '\0'))
1635 /*******************************************************************
1636 Convert a name to a gid_t if possible. Return -1 if not a group.
1637 ********************************************************************/
1639 gid_t nametogid(const char *name)
1645 g = (gid_t)strtol(name, &p, 0);
1646 if ((p != name) && (*p == '\0'))
1649 grp = sys_getgrnam(name);
1651 return(grp->gr_gid);
1655 /*******************************************************************
1656 Something really nasty happened - panic !
1657 ********************************************************************/
1659 void smb_panic(const char *const why)
1667 if (global_clobber_region_function) {
1668 DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1669 global_clobber_region_function,
1670 global_clobber_region_line));
1675 DEBUG(0,("PANIC (pid %llu): %s\n",
1676 (unsigned long long)sys_getpid(), why));
1679 cmd = lp_panic_action();
1681 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1682 result = system(cmd);
1685 DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1688 DEBUG(0, ("smb_panic(): action returned status %d\n",
1689 WEXITSTATUS(result)));
1695 /*******************************************************************
1696 Print a backtrace of the stack to the debug log. This function
1697 DELIBERATELY LEAKS MEMORY. The expectation is that you should
1698 exit shortly after calling it.
1699 ********************************************************************/
1701 #ifdef HAVE_LIBUNWIND_H
1702 #include <libunwind.h>
1705 #ifdef HAVE_EXECINFO_H
1706 #include <execinfo.h>
1709 #ifdef HAVE_LIBEXC_H
1713 void log_stack_trace(void)
1715 #ifdef HAVE_LIBUNWIND
1716 /* Try to use libunwind before any other technique since on ia64
1717 * libunwind correctly walks the stack in more circumstances than
1720 unw_cursor_t cursor;
1725 unw_word_t ip, sp, off;
1727 procname[sizeof(procname) - 1] = '\0';
1729 if (unw_getcontext(&uc) != 0) {
1730 goto libunwind_failed;
1733 if (unw_init_local(&cursor, &uc) != 0) {
1734 goto libunwind_failed;
1737 DEBUG(0, ("BACKTRACE:\n"));
1741 unw_get_reg(&cursor, UNW_REG_IP, &ip);
1742 unw_get_reg(&cursor, UNW_REG_SP, &sp);
1744 switch (unw_get_proc_name(&cursor,
1745 procname, sizeof(procname) - 1, &off) ) {
1749 /* Name truncated. */
1750 DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1751 i, procname, (long long)off,
1752 (long long)ip, (long long) sp));
1755 /* case -UNW_ENOINFO: */
1756 /* case -UNW_EUNSPEC: */
1757 /* No symbol name found. */
1758 DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1759 i, "<unknown symbol>",
1760 (long long)ip, (long long) sp));
1763 } while (unw_step(&cursor) > 0);
1768 DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1770 #elif HAVE_BACKTRACE_SYMBOLS
1771 void *backtrace_stack[BACKTRACE_STACK_SIZE];
1772 size_t backtrace_size;
1773 char **backtrace_strings;
1775 /* get the backtrace (stack frames) */
1776 backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1777 backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1779 DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1780 (unsigned long)backtrace_size));
1782 if (backtrace_strings) {
1785 for (i = 0; i < backtrace_size; i++)
1786 DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1788 /* Leak the backtrace_strings, rather than risk what free() might do */
1793 /* The IRIX libexc library provides an API for unwinding the stack. See
1794 * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1795 * since we are about to abort anyway, it hardly matters.
1798 #define NAMESIZE 32 /* Arbitrary */
1800 __uint64_t addrs[BACKTRACE_STACK_SIZE];
1801 char * names[BACKTRACE_STACK_SIZE];
1802 char namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1809 ZERO_ARRAY(namebuf);
1811 /* We need to be root so we can open our /proc entry to walk
1812 * our stack. It also helps when we want to dump core.
1816 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1817 names[i] = namebuf + (i * NAMESIZE);
1820 levels = trace_back_stack(0, addrs, names,
1821 BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1823 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1824 for (i = 0; i < levels; i++) {
1825 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1830 DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1834 /*******************************************************************
1835 A readdir wrapper which just returns the file name.
1836 ********************************************************************/
1838 const char *readdirname(SMB_STRUCT_DIR *p)
1840 SMB_STRUCT_DIRENT *ptr;
1846 ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1850 dname = ptr->d_name;
1857 #ifdef HAVE_BROKEN_READDIR_NAME
1858 /* using /usr/ucb/cc is BAD */
1864 int len = NAMLEN(ptr);
1865 memcpy(buf, dname, len);
1873 /*******************************************************************
1874 Utility function used to decide if the last component
1875 of a path matches a (possibly wildcarded) entry in a namelist.
1876 ********************************************************************/
1878 BOOL is_in_path(const char *name, name_compare_entry *namelist, BOOL case_sensitive)
1880 const char *last_component;
1882 /* if we have no list it's obviously not in the path */
1883 if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1887 DEBUG(8, ("is_in_path: %s\n", name));
1889 /* Get the last component of the unix name. */
1890 last_component = strrchr_m(name, '/');
1891 if (!last_component) {
1892 last_component = name;
1894 last_component++; /* Go past '/' */
1897 for(; namelist->name != NULL; namelist++) {
1898 if(namelist->is_wild) {
1899 if (mask_match(last_component, namelist->name, case_sensitive)) {
1900 DEBUG(8,("is_in_path: mask match succeeded\n"));
1904 if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1905 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1906 DEBUG(8,("is_in_path: match succeeded\n"));
1911 DEBUG(8,("is_in_path: match not found\n"));
1915 /*******************************************************************
1916 Strip a '/' separated list into an array of
1917 name_compare_enties structures suitable for
1918 passing to is_in_path(). We do this for
1919 speed so we can pre-parse all the names in the list
1920 and don't do it for each call to is_in_path().
1921 namelist is modified here and is assumed to be
1922 a copy owned by the caller.
1923 We also check if the entry contains a wildcard to
1924 remove a potentially expensive call to mask_match
1926 ********************************************************************/
1928 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1931 char *nameptr = namelist;
1932 int num_entries = 0;
1935 (*ppname_array) = NULL;
1937 if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1940 /* We need to make two passes over the string. The
1941 first to count the number of elements, the second
1946 if ( *nameptr == '/' ) {
1947 /* cope with multiple (useless) /s) */
1951 /* find the next / */
1952 name_end = strchr_m(nameptr, '/');
1954 /* oops - the last check for a / didn't find one. */
1955 if (name_end == NULL)
1958 /* next segment please */
1959 nameptr = name_end + 1;
1963 if(num_entries == 0)
1966 if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1967 DEBUG(0,("set_namearray: malloc fail\n"));
1971 /* Now copy out the names */
1975 if ( *nameptr == '/' ) {
1976 /* cope with multiple (useless) /s) */
1980 /* find the next / */
1981 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1984 /* oops - the last check for a / didn't find one. */
1985 if(name_end == NULL)
1988 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1989 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1990 DEBUG(0,("set_namearray: malloc fail (1)\n"));
1994 /* next segment please */
1995 nameptr = name_end + 1;
1999 (*ppname_array)[i].name = NULL;
2004 /****************************************************************************
2005 Routine to free a namearray.
2006 ****************************************************************************/
2008 void free_namearray(name_compare_entry *name_array)
2012 if(name_array == NULL)
2015 for(i=0; name_array[i].name!=NULL; i++)
2016 SAFE_FREE(name_array[i].name);
2017 SAFE_FREE(name_array);
2021 #define DBGC_CLASS DBGC_LOCKING
2023 /****************************************************************************
2024 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
2025 is dealt with in posix.c
2026 Returns True if the lock was granted, False otherwise.
2027 ****************************************************************************/
2029 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
2031 SMB_STRUCT_FLOCK lock;
2034 DEBUG(8,("fcntl_lock fd=%d op=%d offset=%.0f count=%.0f type=%d\n",
2035 fd,op,(double)offset,(double)count,type));
2038 lock.l_whence = SEEK_SET;
2039 lock.l_start = offset;
2043 ret = sys_fcntl_ptr(fd,op,&lock);
2047 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
2048 (double)offset,(double)count,op,type,strerror(errno)));
2053 /* everything went OK */
2054 DEBUG(8,("fcntl_lock: Lock call successful\n"));
2059 /****************************************************************************
2060 Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
2061 is dealt with in posix.c
2062 Returns True if we have information regarding this lock region (and returns
2063 F_UNLCK in *ptype if the region is unlocked). False if the call failed.
2064 ****************************************************************************/
2066 BOOL fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
2068 SMB_STRUCT_FLOCK lock;
2071 DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
2072 fd,(double)*poffset,(double)*pcount,*ptype));
2074 lock.l_type = *ptype;
2075 lock.l_whence = SEEK_SET;
2076 lock.l_start = *poffset;
2077 lock.l_len = *pcount;
2080 ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
2084 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
2085 (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
2090 *ptype = lock.l_type;
2091 *poffset = lock.l_start;
2092 *pcount = lock.l_len;
2095 DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
2096 fd, (int)lock.l_type, (unsigned int)lock.l_pid));
2101 #define DBGC_CLASS DBGC_ALL
2103 /*******************************************************************
2104 Is the name specified one of my netbios names.
2105 Returns true if it is equal, false otherwise.
2106 ********************************************************************/
2108 BOOL is_myname(const char *s)
2113 for (n=0; my_netbios_names(n); n++) {
2114 if (strequal(my_netbios_names(n), s)) {
2119 DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
2123 BOOL is_myname_or_ipaddr(const char *s)
2125 fstring name, dnsname;
2131 /* santize the string from '\\name' */
2135 servername = strrchr_m( name, '\\' );
2141 /* optimize for the common case */
2143 if (strequal(servername, global_myname()))
2146 /* check for an alias */
2148 if (is_myname(servername))
2151 /* check for loopback */
2153 if (strequal(servername, "127.0.0.1"))
2156 if (strequal(servername, "localhost"))
2159 /* maybe it's my dns name */
2161 if ( get_mydnsfullname( dnsname ) )
2162 if ( strequal( servername, dnsname ) )
2165 /* handle possible CNAME records */
2167 if ( !is_ipaddress( servername ) ) {
2168 /* use DNS to resolve the name, but only the first address */
2171 if (((hp = sys_gethostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
2172 struct in_addr return_ip;
2173 putip( (char*)&return_ip, (char*)hp->h_addr );
2174 fstrcpy( name, inet_ntoa( return_ip ) );
2179 /* maybe its an IP address? */
2180 if (is_ipaddress(servername)) {
2181 struct iface_struct nics[MAX_INTERFACES];
2185 ip = interpret_addr(servername);
2186 if ((ip==0) || (ip==0xffffffff))
2189 n = get_interfaces(nics, MAX_INTERFACES);
2190 for (i=0; i<n; i++) {
2191 if (ip == nics[i].ip.s_addr)
2200 /*******************************************************************
2201 Is the name specified our workgroup/domain.
2202 Returns true if it is equal, false otherwise.
2203 ********************************************************************/
2205 BOOL is_myworkgroup(const char *s)
2209 if (strequal(s, lp_workgroup())) {
2213 DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
2217 /*******************************************************************
2218 we distinguish between 2K and XP by the "Native Lan Manager" string
2219 WinXP => "Windows 2002 5.1"
2220 WinXP 64bit => "Windows XP 5.2"
2221 Win2k => "Windows 2000 5.0"
2222 NT4 => "Windows NT 4.0"
2223 Win9x => "Windows 4.0"
2224 Windows 2003 doesn't set the native lan manager string but
2225 they do set the domain to "Windows 2003 5.2" (probably a bug).
2226 ********************************************************************/
2228 void ra_lanman_string( const char *native_lanman )
2230 if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
2231 set_remote_arch( RA_WINXP );
2232 else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
2233 set_remote_arch( RA_WINXP );
2234 else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
2235 set_remote_arch( RA_WIN2K3 );
2238 /*******************************************************************
2239 Set the horrid remote_arch string based on an enum.
2240 ********************************************************************/
2242 void set_remote_arch(enum remote_arch_types type)
2247 fstrcpy(remote_arch, "WfWg");
2250 fstrcpy(remote_arch, "OS2");
2253 fstrcpy(remote_arch, "Win95");
2256 fstrcpy(remote_arch, "WinNT");
2259 fstrcpy(remote_arch, "Win2K");
2262 fstrcpy(remote_arch, "WinXP");
2265 fstrcpy(remote_arch, "Win2K3");
2268 fstrcpy(remote_arch, "Vista");
2271 fstrcpy(remote_arch,"Samba");
2274 fstrcpy(remote_arch,"CIFSFS");
2277 ra_type = RA_UNKNOWN;
2278 fstrcpy(remote_arch, "UNKNOWN");
2282 DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n", remote_arch));
2285 /*******************************************************************
2286 Get the remote_arch type.
2287 ********************************************************************/
2289 enum remote_arch_types get_remote_arch(void)
2294 void print_asc(int level, const unsigned char *buf,int len)
2298 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
2301 void dump_data(int level, const unsigned char *buf,int len)
2306 if (!DEBUGLVL(level)) return;
2308 DEBUGADD(level,("[%03X] ",i));
2310 DEBUGADD(level,("%02X ",(int)buf[i]));
2312 if (i%8 == 0) DEBUGADD(level,(" "));
2314 print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
2315 print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
2316 if (i<len) DEBUGADD(level,("[%03X] ",i));
2322 DEBUGADD(level,(" "));
2323 if (n>8) DEBUGADD(level,(" "));
2324 while (n--) DEBUGADD(level,(" "));
2326 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2328 if (n>0) print_asc(level,&buf[i-n],n);
2329 DEBUGADD(level,("\n"));
2333 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2335 #ifdef DEBUG_PASSWORD
2336 DEBUG(11, ("%s", msg));
2337 if (data != NULL && len > 0)
2339 dump_data(11, data, len);
2344 char *tab_depth(int depth)
2346 static pstring spaces;
2347 memset(spaces, ' ', depth * 4);
2348 spaces[depth * 4] = 0;
2352 /*****************************************************************************
2353 Provide a checksum on a string
2355 Input: s - the null-terminated character string for which the checksum
2358 Output: The checksum value calculated for s.
2359 *****************************************************************************/
2361 int str_checksum(const char *s)
2369 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2376 /*****************************************************************
2377 Zero a memory area then free it. Used to catch bugs faster.
2378 *****************************************************************/
2380 void zero_free(void *p, size_t size)
2386 /*****************************************************************
2387 Set our open file limit to a requested max and return the limit.
2388 *****************************************************************/
2390 int set_maxfiles(int requested_max)
2392 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2394 int saved_current_limit;
2396 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2397 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2400 return requested_max;
2404 * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2405 * account for the extra fd we need
2406 * as well as the log files and standard
2407 * handles etc. Save the limit we want to set in case
2408 * we are running on an OS that doesn't support this limit (AIX)
2409 * which always returns RLIM_INFINITY for rlp.rlim_max.
2412 /* Try raising the hard (max) limit to the requested amount. */
2414 #if defined(RLIM_INFINITY)
2415 if (rlp.rlim_max != RLIM_INFINITY) {
2416 int orig_max = rlp.rlim_max;
2418 if ( rlp.rlim_max < requested_max )
2419 rlp.rlim_max = requested_max;
2421 /* This failing is not an error - many systems (Linux) don't
2422 support our default request of 10,000 open files. JRA. */
2424 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2425 DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2426 (int)rlp.rlim_max, strerror(errno) ));
2428 /* Set failed - restore original value from get. */
2429 rlp.rlim_max = orig_max;
2434 /* Now try setting the soft (current) limit. */
2436 saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2438 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2439 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2440 (int)rlp.rlim_cur, strerror(errno) ));
2442 return saved_current_limit;
2445 if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2446 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2449 return saved_current_limit;
2452 #if defined(RLIM_INFINITY)
2453 if(rlp.rlim_cur == RLIM_INFINITY)
2454 return saved_current_limit;
2457 if((int)rlp.rlim_cur > saved_current_limit)
2458 return saved_current_limit;
2460 return rlp.rlim_cur;
2461 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2463 * No way to know - just guess...
2465 return requested_max;
2469 /*****************************************************************
2470 Possibly replace mkstemp if it is broken.
2471 *****************************************************************/
2473 int smb_mkstemp(char *name_template)
2475 #if HAVE_SECURE_MKSTEMP
2476 return mkstemp(name_template);
2478 /* have a reasonable go at emulating it. Hope that
2479 the system mktemp() isn't completly hopeless */
2480 char *p = mktemp(name_template);
2483 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2487 /*****************************************************************
2488 malloc that aborts with smb_panic on fail or zero size.
2489 *****************************************************************/
2491 void *smb_xmalloc_array(size_t size, unsigned int count)
2495 smb_panic("smb_xmalloc_array: called with zero size");
2497 if (count >= MAX_ALLOC_SIZE/size) {
2498 smb_panic("smb_xmalloc_array: alloc size too large");
2500 if ((p = SMB_MALLOC(size*count)) == NULL) {
2501 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2502 (unsigned long)size, (unsigned long)count));
2503 smb_panic("smb_xmalloc_array: malloc failed");
2509 Memdup with smb_panic on fail.
2512 void *smb_xmemdup(const void *p, size_t size)
2515 p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2516 memcpy(p2, p, size);
2521 strdup that aborts on malloc fail.
2524 char *smb_xstrdup(const char *s)
2526 #if defined(PARANOID_MALLOC_CHECKER)
2533 #define strdup rep_strdup
2536 char *s1 = strdup(s);
2537 #if defined(PARANOID_MALLOC_CHECKER)
2541 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2544 smb_panic("smb_xstrdup: malloc failed");
2551 strndup that aborts on malloc fail.
2554 char *smb_xstrndup(const char *s, size_t n)
2556 #if defined(PARANOID_MALLOC_CHECKER)
2562 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
2564 #define strndup rep_strndup
2567 char *s1 = strndup(s, n);
2568 #if defined(PARANOID_MALLOC_CHECKER)
2572 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2575 smb_panic("smb_xstrndup: malloc failed");
2581 vasprintf that aborts on malloc fail
2584 int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2591 n = vasprintf(ptr, format, ap2);
2592 if (n == -1 || ! *ptr) {
2593 smb_panic("smb_xvasprintf: out of memory");
2598 /*****************************************************************
2599 Like strdup but for memory.
2600 *****************************************************************/
2602 void *memdup(const void *p, size_t size)
2607 p2 = SMB_MALLOC(size);
2610 memcpy(p2, p, size);
2614 /*****************************************************************
2615 Get local hostname and cache result.
2616 *****************************************************************/
2618 char *myhostname(void)
2626 /*****************************************************************
2627 A useful function for returning a path in the Samba lock directory.
2628 *****************************************************************/
2630 char *lock_path(const char *name)
2632 static pstring fname;
2634 pstrcpy(fname,lp_lockdir());
2635 trim_char(fname,'\0','/');
2637 if (!directory_exist(fname,NULL))
2641 pstrcat(fname,name);
2646 /*****************************************************************
2647 A useful function for returning a path in the Samba pid directory.
2648 *****************************************************************/
2650 char *pid_path(const char *name)
2652 static pstring fname;
2654 pstrcpy(fname,lp_piddir());
2655 trim_char(fname,'\0','/');
2657 if (!directory_exist(fname,NULL))
2661 pstrcat(fname,name);
2667 * @brief Returns an absolute path to a file in the Samba lib directory.
2669 * @param name File to find, relative to LIBDIR.
2671 * @retval Pointer to a static #pstring containing the full path.
2674 char *lib_path(const char *name)
2676 static pstring fname;
2677 fstr_sprintf(fname, "%s/%s", dyn_LIBDIR, name);
2682 * @brief Returns the platform specific shared library extension.
2684 * @retval Pointer to a static #fstring containing the extension.
2687 const char *shlib_ext(void)
2689 return dyn_SHLIBEXT;
2692 /*******************************************************************
2693 Given a filename - get its directory name
2694 NB: Returned in static storage. Caveats:
2695 o Not safe in thread environment.
2696 o Caller must not free.
2697 o If caller wishes to preserve, they should copy.
2698 ********************************************************************/
2700 char *parent_dirname(const char *path)
2702 static pstring dirpath;
2708 pstrcpy(dirpath, path);
2709 p = strrchr_m(dirpath, '/'); /* Find final '/', if any */
2711 pstrcpy(dirpath, "."); /* No final "/", so dir is "." */
2714 ++p; /* For root "/", leave "/" in place */
2720 BOOL parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2721 char **parent, const char **name)
2726 p = strrchr_m(dir, '/'); /* Find final '/', if any */
2729 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2740 if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2743 memcpy(*parent, dir, len);
2744 (*parent)[len] = '\0';
2752 /*******************************************************************
2753 Determine if a pattern contains any Microsoft wildcard characters.
2754 *******************************************************************/
2756 BOOL ms_has_wild(const char *s)
2760 if (lp_posix_pathnames()) {
2761 /* With posix pathnames no characters are wild. */
2765 while ((c = *s++)) {
2778 BOOL ms_has_wild_w(const smb_ucs2_t *s)
2781 if (!s) return False;
2782 while ((c = *s++)) {
2784 case UCS2_CHAR('*'):
2785 case UCS2_CHAR('?'):
2786 case UCS2_CHAR('<'):
2787 case UCS2_CHAR('>'):
2788 case UCS2_CHAR('"'):
2795 /*******************************************************************
2796 A wrapper that handles case sensitivity and the special handling
2798 *******************************************************************/
2800 BOOL mask_match(const char *string, const char *pattern, BOOL is_case_sensitive)
2802 if (strcmp(string,"..") == 0)
2804 if (strcmp(pattern,".") == 0)
2807 return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2810 /*******************************************************************
2811 A wrapper that handles case sensitivity and the special handling
2812 of the ".." name. Varient that is only called by old search code which requires
2813 pattern translation.
2814 *******************************************************************/
2816 BOOL mask_match_search(const char *string, const char *pattern, BOOL is_case_sensitive)
2818 if (strcmp(string,"..") == 0)
2820 if (strcmp(pattern,".") == 0)
2823 return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2826 /*******************************************************************
2827 A wrapper that handles a list of patters and calls mask_match()
2828 on each. Returns True if any of the patterns match.
2829 *******************************************************************/
2831 BOOL mask_match_list(const char *string, char **list, int listLen, BOOL is_case_sensitive)
2833 while (listLen-- > 0) {
2834 if (mask_match(string, *list++, is_case_sensitive))
2840 /*********************************************************
2841 Recursive routine that is called by unix_wild_match.
2842 *********************************************************/
2844 static BOOL unix_do_match(const char *regexp, const char *str)
2848 for( p = regexp; *p && *str; ) {
2859 * Look for a character matching
2860 * the one after the '*'.
2864 return True; /* Automatic match */
2867 while(*str && (*p != *str))
2871 * Patch from weidel@multichart.de. In the case of the regexp
2872 * '*XX*' we want to ensure there are at least 2 'X' characters
2873 * in the string after the '*' for a match to be made.
2880 * Eat all the characters that match, but count how many there were.
2883 while(*str && (*p == *str)) {
2889 * Now check that if the regexp had n identical characters that
2890 * matchcount had at least that many matches.
2893 while ( *(p+1) && (*(p+1) == *p)) {
2898 if ( matchcount <= 0 )
2902 str--; /* We've eaten the match char after the '*' */
2904 if(unix_do_match(p, str))
2926 if (!*p && str[0] == '.' && str[1] == 0)
2929 if (!*str && *p == '?') {
2935 if(!*str && (*p == '*' && p[1] == '\0'))
2941 /*******************************************************************
2942 Simple case insensitive interface to a UNIX wildcard matcher.
2943 Returns True if match, False if not.
2944 *******************************************************************/
2946 BOOL unix_wild_match(const char *pattern, const char *string)
2951 pstrcpy(p2, pattern);
2952 pstrcpy(s2, string);
2956 /* Remove any *? and ** from the pattern as they are meaningless */
2957 for(p = p2; *p; p++)
2958 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
2959 pstrcpy( &p[1], &p[2]);
2961 if (strequal(p2,"*"))
2964 return unix_do_match(p2, s2);
2967 /**********************************************************************
2968 Converts a name to a fully qualified domain name.
2969 Returns True if lookup succeeded, False if not (then fqdn is set to name)
2970 ***********************************************************************/
2972 BOOL name_to_fqdn(fstring fqdn, const char *name)
2974 struct hostent *hp = sys_gethostbyname(name);
2976 if ( hp && hp->h_name && *hp->h_name ) {
2979 /* find out if the fqdn is returned as an alias
2980 * to cope with /etc/hosts files where the first
2981 * name is not the fqdn but the short name */
2982 if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2984 for (i = 0; hp->h_aliases[i]; i++) {
2985 if (strchr_m(hp->h_aliases[i], '.')) {
2986 full = hp->h_aliases[i];
2991 if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2992 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2993 DEBUGADD(1, (" Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2994 DEBUGADD(1, (" to Kerberos authentication problems as localhost.localdomain\n"));
2995 DEBUGADD(1, (" may end up being used instead of the real machine FQDN.\n"));
3003 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
3004 fstrcpy(fqdn, full);
3007 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
3008 fstrcpy(fqdn, name);
3013 /**********************************************************************
3014 Extension to talloc_get_type: Abort on type mismatch
3015 ***********************************************************************/
3017 void *talloc_check_name_abort(const void *ptr, const char *name)
3021 result = talloc_check_name(ptr, name);
3025 DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
3026 name, talloc_get_name(ptr)));
3027 smb_panic("talloc type mismatch");
3028 /* Keep the compiler happy */
3035 /*******************************************************************
3036 This routine is a trick to immediately catch errors when debugging
3037 with insure. A xterm with a gdb is popped up when insure catches
3038 a error. It is Linux specific.
3039 ********************************************************************/
3041 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
3046 /* you can get /usr/bin/backtrace from
3047 http://samba.org/ftp/unpacked/junkcode/backtrace */
3048 pstring cmd = "/usr/bin/backtrace %d";
3050 slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
3051 pstring_sub(cmd, "%d", pidstr);
3055 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
3056 fn = dlsym(h, "_Insure_trap_error");
3058 if (!h || h == _Insure_trap_error) {
3059 h = dlopen("/usr/local/parasoft/lib.linux2/libinsure.so", RTLD_LAZY);
3060 fn = dlsym(h, "_Insure_trap_error");
3064 ret = fn(a1, a2, a3, a4, a5, a6);
3072 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
3074 switch (share_access & ~FILE_SHARE_DELETE) {
3075 case FILE_SHARE_NONE:
3077 case FILE_SHARE_READ:
3079 case FILE_SHARE_WRITE:
3081 case FILE_SHARE_READ|FILE_SHARE_WRITE:
3084 if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
3086 } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
3093 pid_t procid_to_pid(const struct server_id *proc)
3098 static uint32 my_vnn = NONCLUSTER_VNN;
3100 void set_my_vnn(uint32 vnn)
3102 DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3106 uint32 get_my_vnn(void)
3111 struct server_id pid_to_procid(pid_t pid)
3113 struct server_id result;
3115 #ifdef CLUSTER_SUPPORT
3116 result.vnn = my_vnn;
3121 struct server_id procid_self(void)
3123 return pid_to_procid(sys_getpid());
3126 struct server_id server_id_self(void)
3128 return procid_self();
3131 BOOL procid_equal(const struct server_id *p1, const struct server_id *p2)
3133 if (p1->pid != p2->pid)
3135 #ifdef CLUSTER_SUPPORT
3136 if (p1->vnn != p2->vnn)
3142 BOOL cluster_id_equal(const struct server_id *id1,
3143 const struct server_id *id2)
3145 return procid_equal(id1, id2);
3148 BOOL procid_is_me(const struct server_id *pid)
3150 if (pid->pid != sys_getpid())
3152 #ifdef CLUSTER_SUPPORT
3153 if (pid->vnn != my_vnn)
3159 struct server_id interpret_pid(const char *pid_string)
3161 #ifdef CLUSTER_SUPPORT
3162 unsigned int vnn, pid;
3163 struct server_id result;
3164 if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3168 else if (sscanf(pid_string, "%u", &pid) == 1) {
3169 result.vnn = NONCLUSTER_VNN;
3173 result.vnn = NONCLUSTER_VNN;
3178 return pid_to_procid(atoi(pid_string));
3182 char *procid_str_static(const struct server_id *pid)
3185 #ifdef CLUSTER_SUPPORT
3186 if (pid->vnn == NONCLUSTER_VNN) {
3187 fstr_sprintf(str, "%d", (int)pid->pid);
3190 fstr_sprintf(str, "%u:%d", (unsigned)pid->vnn, (int)pid->pid);
3193 fstr_sprintf(str, "%d", (int)pid->pid);
3198 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3200 return talloc_strdup(mem_ctx, procid_str_static(pid));
3203 BOOL procid_valid(const struct server_id *pid)
3205 return (pid->pid != -1);
3208 BOOL procid_is_local(const struct server_id *pid)
3210 #ifdef CLUSTER_SUPPORT
3211 return pid->vnn == my_vnn;
3217 int this_is_smp(void)
3219 #if defined(HAVE_SYSCONF)
3221 #if defined(SYSCONF_SC_NPROC_ONLN)
3222 return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3223 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3224 return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3234 /****************************************************************
3235 Check if an offset into a buffer is safe.
3236 If this returns True it's safe to indirect into the byte at
3238 ****************************************************************/
3240 BOOL is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3242 const char *end_base = buf_base + buf_len;
3243 char *end_ptr = ptr + off;
3245 if (!buf_base || !ptr) {
3249 if (end_base < buf_base || end_ptr < ptr) {
3250 return False; /* wrap. */
3253 if (end_ptr < end_base) {
3259 /****************************************************************
3260 Return a safe pointer into a buffer, or NULL.
3261 ****************************************************************/
3263 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3265 return is_offset_safe(buf_base, buf_len, ptr, off) ?
3269 /****************************************************************
3270 Return a safe pointer into a string within a buffer, or NULL.
3271 ****************************************************************/
3273 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3275 if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3278 /* Check if a valid string exists at this offset. */
3279 if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3285 /****************************************************************
3286 Return an SVAL at a pointer, or failval if beyond the end.
3287 ****************************************************************/
3289 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3292 * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3295 if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3298 return SVAL(ptr,off);
3301 /****************************************************************
3302 Return an IVAL at a pointer, or failval if beyond the end.
3303 ****************************************************************/
3305 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3308 * Note we use off+3 here, not off+4 as IVAL accesses
3309 * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3311 if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3314 return IVAL(ptr,off);
3319 Disable these now we've checked all code paths and ensured
3320 NULL returns on zero request. JRA.
3322 /****************************************************************
3323 talloc wrapper functions that guarentee a null pointer return
3325 ****************************************************************/
3327 #ifndef MAX_TALLOC_SIZE
3328 #define MAX_TALLOC_SIZE 0x10000000
3332 * talloc and zero memory.
3333 * - returns NULL if size is zero.
3336 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3344 p = talloc_named_const(ctx, size, name);
3347 memset(p, '\0', size);
3354 * memdup with a talloc.
3355 * - returns NULL if size is zero.
3358 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3366 newp = talloc_named_const(t, size, name);
3368 memcpy(newp, p, size);
3375 * alloc an array, checking for integer overflow in the array size.
3376 * - returns NULL if count or el_size are zero.
3379 void *_talloc_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_named_const(ctx, el_size * count, name);
3393 * alloc an zero array, checking for integer overflow in the array size
3394 * - returns NULL if count or el_size are zero.
3397 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3399 if (count >= MAX_TALLOC_SIZE/el_size) {
3403 if (el_size == 0 || count == 0) {
3407 return _talloc_zero(ctx, el_size * count, name);
3411 * Talloc wrapper that returns NULL if size == 0.
3413 void *talloc_zeronull(const void *context, size_t size, const char *name)
3418 return talloc_named_const(context, size, name);