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 2001-2011
7 Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
8 Copyright (C) James J Myers 2003
9 Copyright (C) Volker Lendecke 2010
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include "system/network.h"
27 #include "system/filesys.h"
28 #include "system/locale.h"
29 #include "system/shmem.h"
30 #include "system/passwd.h"
41 * @brief Misc utility functions
45 Find a suitable temporary directory. The result should be copied immediately
46 as it may be overwritten by a subsequent call.
48 _PUBLIC_
const char *tmpdir(void)
51 if ((p
= getenv("TMPDIR")))
58 Create a tmp file, open it and immediately unlink it.
59 If dir is NULL uses tmpdir()
60 Returns the file descriptor or -1 on error.
62 int create_unlink_tmp(const char *dir
)
72 fname
= talloc_asprintf(talloc_tos(), "%s/listenerlock_XXXXXX", dir
);
77 mask
= umask(S_IRWXO
| S_IRWXG
);
84 if (unlink(fname
) == -1) {
85 int sys_errno
= errno
;
97 Check if a file exists - call vfs_file_exist for samba files.
99 _PUBLIC_
bool file_exist(const char *fname
)
103 if (stat(fname
, &st
) != 0) {
107 return ((S_ISREG(st
.st_mode
)) || (S_ISFIFO(st
.st_mode
)));
111 Check a files mod time.
114 _PUBLIC_
time_t file_modtime(const char *fname
)
118 if (stat(fname
,&st
) != 0)
125 Check if a directory exists.
128 _PUBLIC_
bool directory_exist(const char *dname
)
133 if (stat(dname
,&st
) != 0) {
137 ret
= S_ISDIR(st
.st_mode
);
144 * Try to create the specified directory if it didn't exist.
146 * @retval true if the directory already existed and has the right permissions
147 * or was successfully created.
149 _PUBLIC_
bool directory_create_or_exist(const char *dname
,
156 ret
= lstat(dname
, &st
);
160 if (errno
!= ENOENT
) {
161 DEBUG(0, ("lstat failed on directory %s: %s\n",
162 dname
, strerror(errno
)));
166 /* Create directory */
167 old_umask
= umask(0);
168 ret
= mkdir(dname
, dir_perms
);
169 if (ret
== -1 && errno
!= EEXIST
) {
170 DEBUG(0, ("mkdir failed on directory "
178 ret
= lstat(dname
, &st
);
180 DEBUG(0, ("lstat failed on created directory %s: %s\n",
181 dname
, strerror(errno
)));
190 * @brief Try to create a specified directory if it doesn't exist.
192 * The function creates a directory with the given uid and permissions if it
193 * doesn't exixt. If it exists it makes sure the uid and permissions are
194 * correct and it will fail if they are different.
196 * @param[in] dname The directory to create.
198 * @param[in] uid The uid the directory needs to belong too.
200 * @param[in] dir_perms The expected permissions of the directory.
202 * @return True on success, false on error.
204 _PUBLIC_
bool directory_create_or_exist_strict(const char *dname
,
212 ok
= directory_create_or_exist(dname
, uid
, dir_perms
);
217 rc
= lstat(dname
, &st
);
219 DEBUG(0, ("lstat failed on created directory %s: %s\n",
220 dname
, strerror(errno
)));
224 /* Check ownership and permission on existing directory */
225 if (!S_ISDIR(st
.st_mode
)) {
226 DEBUG(0, ("directory %s isn't a directory\n",
230 if (st
.st_uid
!= uid
&& !uwrap_enabled()) {
231 DEBUG(0, ("invalid ownership on directory "
235 if ((st
.st_mode
& 0777) != dir_perms
) {
236 DEBUG(0, ("invalid permissions on directory "
237 "'%s': has 0%o should be 0%o\n", dname
,
238 (unsigned int)(st
.st_mode
& 0777), (unsigned int)dir_perms
));
247 Sleep for a specified number of milliseconds.
250 _PUBLIC_
void smb_msleep(unsigned int t
)
252 #if defined(HAVE_NANOSLEEP)
257 ts
.tv_nsec
= 1000000*(t
%1000);
261 ret
= nanosleep(&ts
, &ts
);
262 } while (ret
< 0 && errno
== EINTR
&& (ts
.tv_sec
> 0 || ts
.tv_nsec
> 0));
264 unsigned int tdiff
=0;
265 struct timeval tval
,t1
,t2
;
272 tval
.tv_sec
= (t
-tdiff
)/1000;
273 tval
.tv_usec
= 1000*((t
-tdiff
)%1000);
275 /* Never wait for more than 1 sec. */
276 if (tval
.tv_sec
> 1) {
283 select(0,&fds
,NULL
,NULL
,&tval
);
286 if (t2
.tv_sec
< t1
.tv_sec
) {
287 /* Someone adjusted time... */
291 tdiff
= usec_time_diff(&t2
,&t1
)/1000;
297 Get my own name, return in talloc'ed storage.
300 _PUBLIC_
char *get_myname(TALLOC_CTX
*ctx
)
303 char hostname
[HOST_NAME_MAX
];
305 /* get my host name */
306 if (gethostname(hostname
, sizeof(hostname
)) == -1) {
307 DEBUG(0,("gethostname failed\n"));
311 /* Ensure null termination. */
312 hostname
[sizeof(hostname
)-1] = '\0';
314 /* split off any parts after an initial . */
315 p
= strchr_m(hostname
, '.');
320 return talloc_strdup(ctx
, hostname
);
324 Check if a process exists. Does this work on all unixes?
327 _PUBLIC_
bool process_exists_by_pid(pid_t pid
)
329 /* Doing kill with a non-positive pid causes messages to be
330 * sent to places we don't want. */
334 return(kill(pid
,0) == 0 || errno
!= ESRCH
);
338 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
339 is dealt with in posix.c
342 _PUBLIC_
bool fcntl_lock(int fd
, int op
, off_t offset
, off_t count
, int type
)
347 DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd
,op
,(double)offset
,(double)count
,type
));
350 lock
.l_whence
= SEEK_SET
;
351 lock
.l_start
= offset
;
355 ret
= fcntl(fd
,op
,&lock
);
357 if (ret
== -1 && errno
!= 0)
358 DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno
,strerror(errno
)));
363 (lock
.l_type
!= F_UNLCK
) &&
365 (lock
.l_pid
!= getpid())) {
366 DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd
,(int)lock
.l_pid
));
370 /* it must be not locked or locked by me */
374 /* a lock set or unset */
376 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
377 (double)offset
,(double)count
,op
,type
,strerror(errno
)));
381 /* everything went OK */
382 DEBUG(8,("fcntl_lock: Lock call successful\n"));
387 struct debug_channel_level
{
392 static void debugadd_channel_cb(const char *buf
, void *private_data
)
394 struct debug_channel_level
*dcl
=
395 (struct debug_channel_level
*)private_data
;
397 DEBUGADDC(dcl
->channel
, dcl
->level
,("%s", buf
));
400 static void debugadd_cb(const char *buf
, void *private_data
)
402 int *plevel
= (int *)private_data
;
403 DEBUGADD(*plevel
, ("%s", buf
));
406 void print_asc_cb(const uint8_t *buf
, int len
,
407 void (*cb
)(const char *buf
, void *private_data
),
414 for (i
=0; i
<len
; i
++) {
415 s
[0] = isprint(buf
[i
]) ? buf
[i
] : '.';
420 void print_asc(int level
, const uint8_t *buf
,int len
)
422 print_asc_cb(buf
, len
, debugadd_cb
, &level
);
426 * Write dump of binary data to a callback
428 void dump_data_cb(const uint8_t *buf
, int len
,
429 bool omit_zero_bytes
,
430 void (*cb
)(const char *buf
, void *private_data
),
434 static const uint8_t empty
[16] = { 0, };
435 bool skipped
= false;
443 if ((omit_zero_bytes
== true) &&
446 (memcmp(&buf
[i
], &empty
, 16) == 0))
453 snprintf(tmp
, sizeof(tmp
), "[%04X] ", i
);
454 cb(tmp
, private_data
);
458 snprintf(tmp
, sizeof(tmp
), "%02X ", (int)buf
[i
]);
459 cb(tmp
, private_data
);
462 cb(" ", private_data
);
466 print_asc_cb(&buf
[i
-16], 8, cb
, private_data
);
467 cb(" ", private_data
);
468 print_asc_cb(&buf
[i
-8], 8, cb
, private_data
);
469 cb("\n", private_data
);
471 if ((omit_zero_bytes
== true) &&
473 (memcmp(&buf
[i
], &empty
, 16) == 0)) {
475 cb("skipping zero buffer bytes\n",
486 cb(" ", private_data
);
488 cb(" ", private_data
);
491 cb(" ", private_data
);
494 print_asc_cb(&buf
[i
-(i
%16)], n
, cb
, private_data
);
495 cb(" ", private_data
);
498 print_asc_cb(&buf
[i
-n
], n
, cb
, private_data
);
500 cb("\n", private_data
);
506 * Write dump of binary data to the log file.
508 * The data is only written if the log level is at least level.
510 _PUBLIC_
void dump_data(int level
, const uint8_t *buf
, int len
)
512 if (!DEBUGLVL(level
)) {
515 dump_data_cb(buf
, len
, false, debugadd_cb
, &level
);
519 * Write dump of binary data to the log file.
521 * The data is only written if the log level is at least level for
522 * debug class dbgc_class.
524 _PUBLIC_
void dump_data_dbgc(int dbgc_class
, int level
, const uint8_t *buf
, int len
)
526 struct debug_channel_level dcl
= { dbgc_class
, level
};
528 if (!DEBUGLVLC(dbgc_class
, level
)) {
531 dump_data_cb(buf
, len
, false, debugadd_channel_cb
, &dcl
);
535 * Write dump of binary data to the log file.
537 * The data is only written if the log level is at least level.
538 * 16 zero bytes in a row are omitted
540 _PUBLIC_
void dump_data_skip_zeros(int level
, const uint8_t *buf
, int len
)
542 if (!DEBUGLVL(level
)) {
545 dump_data_cb(buf
, len
, true, debugadd_cb
, &level
);
548 static void fprintf_cb(const char *buf
, void *private_data
)
550 FILE *f
= (FILE *)private_data
;
551 fprintf(f
, "%s", buf
);
554 void dump_data_file(const uint8_t *buf
, int len
, bool omit_zero_bytes
,
557 dump_data_cb(buf
, len
, omit_zero_bytes
, fprintf_cb
, f
);
561 malloc that aborts with smb_panic on fail or zero size.
564 _PUBLIC_
void *smb_xmalloc(size_t size
)
568 smb_panic("smb_xmalloc: called with zero size.\n");
569 if ((p
= malloc(size
)) == NULL
)
570 smb_panic("smb_xmalloc: malloc fail.\n");
575 Memdup with smb_panic on fail.
578 _PUBLIC_
void *smb_xmemdup(const void *p
, size_t size
)
581 p2
= smb_xmalloc(size
);
587 strdup that aborts on malloc fail.
590 char *smb_xstrdup(const char *s
)
592 #if defined(PARANOID_MALLOC_CHECKER)
599 #define strdup rep_strdup
602 char *s1
= strdup(s
);
603 #if defined(PARANOID_MALLOC_CHECKER)
607 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
610 smb_panic("smb_xstrdup: malloc failed");
617 strndup that aborts on malloc fail.
620 char *smb_xstrndup(const char *s
, size_t n
)
622 #if defined(PARANOID_MALLOC_CHECKER)
628 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
630 #define strndup rep_strndup
633 char *s1
= strndup(s
, n
);
634 #if defined(PARANOID_MALLOC_CHECKER)
638 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
641 smb_panic("smb_xstrndup: malloc failed");
649 Like strdup but for memory.
652 _PUBLIC_
void *memdup(const void *p
, size_t size
)
665 * Write a password to the log file.
667 * @note Only actually does something if DEBUG_PASSWORD was defined during
670 _PUBLIC_
void dump_data_pw(const char *msg
, const uint8_t * data
, size_t len
)
672 #ifdef DEBUG_PASSWORD
673 DEBUG(11, ("%s", msg
));
674 if (data
!= NULL
&& len
> 0)
676 dump_data(11, data
, len
);
683 * see if a range of memory is all zero. A NULL pointer is considered
686 _PUBLIC_
bool all_zero(const uint8_t *ptr
, size_t size
)
689 if (!ptr
) return true;
690 for (i
=0;i
<size
;i
++) {
691 if (ptr
[i
]) return false;
697 realloc an array, checking for integer overflow in the array size
699 _PUBLIC_
void *realloc_array(void *ptr
, size_t el_size
, unsigned count
, bool free_on_fail
)
701 #define MAX_MALLOC_SIZE 0x7fffffff
703 count
>= MAX_MALLOC_SIZE
/el_size
) {
709 return malloc(el_size
* count
);
711 return realloc(ptr
, el_size
* count
);
714 /****************************************************************************
716 ****************************************************************************/
718 void *malloc_array(size_t el_size
, unsigned int count
)
720 return realloc_array(NULL
, el_size
, count
, false);
723 /****************************************************************************
725 ****************************************************************************/
727 void *memalign_array(size_t el_size
, size_t align
, unsigned int count
)
729 if (count
*el_size
>= MAX_MALLOC_SIZE
) {
733 return memalign(align
, el_size
*count
);
736 /****************************************************************************
738 ****************************************************************************/
740 void *calloc_array(size_t size
, size_t nmemb
)
742 if (nmemb
>= MAX_MALLOC_SIZE
/size
) {
745 if (size
== 0 || nmemb
== 0) {
748 return calloc(nmemb
, size
);
752 Trim the specified elements off the front and back of a string.
754 _PUBLIC_
bool trim_string(char *s
, const char *front
, const char *back
)
761 /* Ignore null or empty strings. */
762 if (!s
|| (s
[0] == '\0'))
765 front_len
= front
? strlen(front
) : 0;
766 back_len
= back
? strlen(back
) : 0;
771 while (len
&& strncmp(s
, front
, front_len
)==0) {
772 /* Must use memmove here as src & dest can
773 * easily overlap. Found by valgrind. JRA. */
774 memmove(s
, s
+front_len
, (len
-front_len
)+1);
781 while ((len
>= back_len
) && strncmp(s
+len
-back_len
,back
,back_len
)==0) {
782 s
[len
-back_len
]='\0';
791 Find the number of 'c' chars in a string
793 _PUBLIC_ _PURE_
size_t count_chars(const char *s
, char c
)
798 if (*s
== c
) count
++;
806 * Routine to get hex characters and turn them into a byte array.
807 * the array can be variable length.
808 * - "0xnn" or "0Xnn" is specially catered for.
809 * - The first non-hex-digit character (apart from possibly leading "0x"
810 * finishes the conversion and skips the rest of the input.
811 * - A single hex-digit character at the end of the string is skipped.
813 * valid examples: "0A5D15"; "0x123456"
815 _PUBLIC_
size_t strhex_to_str(char *p
, size_t p_len
, const char *strhex
, size_t strhex_len
)
818 size_t num_chars
= 0;
819 uint8_t lonybble
, hinybble
;
820 const char *hexchars
= "0123456789ABCDEF";
821 char *p1
= NULL
, *p2
= NULL
;
823 /* skip leading 0x prefix */
824 if (strncasecmp(strhex
, "0x", 2) == 0) {
825 i
+= 2; /* skip two chars */
828 for (; i
+1 < strhex_len
&& strhex
[i
] != 0 && strhex
[i
+1] != 0; i
++) {
829 p1
= strchr(hexchars
, toupper((unsigned char)strhex
[i
]));
834 i
++; /* next hex digit */
836 p2
= strchr(hexchars
, toupper((unsigned char)strhex
[i
]));
841 /* get the two nybbles */
842 hinybble
= PTR_DIFF(p1
, hexchars
);
843 lonybble
= PTR_DIFF(p2
, hexchars
);
845 if (num_chars
>= p_len
) {
849 p
[num_chars
] = (hinybble
<< 4) | lonybble
;
859 * Parse a hex string and return a data blob.
861 _PUBLIC_ _PURE_ DATA_BLOB
strhex_to_data_blob(TALLOC_CTX
*mem_ctx
, const char *strhex
)
863 DATA_BLOB ret_blob
= data_blob_talloc(mem_ctx
, NULL
, strlen(strhex
)/2+1);
865 ret_blob
.length
= strhex_to_str((char *)ret_blob
.data
, ret_blob
.length
,
873 * Print a buf in hex. Assumes dst is at least (srclen*2)+1 large.
875 _PUBLIC_
void hex_encode_buf(char *dst
, const uint8_t *src
, size_t srclen
)
878 for (i
=0; i
<srclen
; i
++) {
879 snprintf(dst
+ i
*2, 3, "%02X", src
[i
]);
882 * Ensure 0-termination for 0-length buffers
884 dst
[srclen
*2] = '\0';
888 * Routine to print a buffer as HEX digits, into an allocated string.
890 _PUBLIC_
void hex_encode(const unsigned char *buff_in
, size_t len
, char **out_hex_buffer
)
894 *out_hex_buffer
= malloc_array_p(char, (len
*2)+1);
895 hex_buffer
= *out_hex_buffer
;
896 hex_encode_buf(hex_buffer
, buff_in
, len
);
900 * talloc version of hex_encode()
902 _PUBLIC_
char *hex_encode_talloc(TALLOC_CTX
*mem_ctx
, const unsigned char *buff_in
, size_t len
)
906 hex_buffer
= talloc_array(mem_ctx
, char, (len
*2)+1);
910 hex_encode_buf(hex_buffer
, buff_in
, len
);
911 talloc_set_name_const(hex_buffer
, hex_buffer
);
916 varient of strcmp() that handles NULL ptrs
918 _PUBLIC_
int strcmp_safe(const char *s1
, const char *s2
)
923 if (s1
== NULL
|| s2
== NULL
) {
926 return strcmp(s1
, s2
);
931 return the number of bytes occupied by a buffer in ASCII format
932 the result includes the null termination
935 _PUBLIC_
size_t ascii_len_n(const char *src
, size_t n
)
939 len
= strnlen(src
, n
);
948 Set a boolean variable from the text value stored in the passed string.
949 Returns true in success, false if the passed string does not correctly
953 _PUBLIC_
bool set_boolean(const char *boolean_string
, bool *boolean
)
955 if (strwicmp(boolean_string
, "yes") == 0 ||
956 strwicmp(boolean_string
, "true") == 0 ||
957 strwicmp(boolean_string
, "on") == 0 ||
958 strwicmp(boolean_string
, "1") == 0) {
961 } else if (strwicmp(boolean_string
, "no") == 0 ||
962 strwicmp(boolean_string
, "false") == 0 ||
963 strwicmp(boolean_string
, "off") == 0 ||
964 strwicmp(boolean_string
, "0") == 0) {
972 return the number of bytes occupied by a buffer in CH_UTF16 format
973 the result includes the null termination
975 _PUBLIC_
size_t utf16_len(const void *buf
)
979 for (len
= 0; SVAL(buf
,len
); len
+= 2) ;
985 return the number of bytes occupied by a buffer in CH_UTF16 format
986 the result includes the null termination
989 _PUBLIC_
size_t utf16_len_n(const void *src
, size_t n
)
993 for (len
= 0; (len
+2 < n
) && SVAL(src
, len
); len
+= 2) ;
1004 * @brief String utilities.
1007 static bool next_token_internal_talloc(TALLOC_CTX
*ctx
,
1014 const char *saved_s
;
1026 /* default to simple separators */
1031 /* find the first non sep char, if left-trimming is requested */
1033 while (*s
&& strchr_m(sep
,*s
)) {
1043 /* When restarting we need to go from here. */
1046 /* Work out the length needed. */
1047 for (quoted
= false; *s
&&
1048 (quoted
|| !strchr_m(sep
,*s
)); s
++) {
1056 /* We started with len = 1 so we have space for the nul. */
1057 *pp_buff
= talloc_array(ctx
, char, len
);
1062 /* copy over the token */
1065 for (quoted
= false; *s
&&
1066 (quoted
|| !strchr_m(sep
,*s
)); s
++) {
1074 *ptr
= (*s
) ? s
+1 : s
;
1080 bool next_token_talloc(TALLOC_CTX
*ctx
,
1085 return next_token_internal_talloc(ctx
, ptr
, pp_buff
, sep
, true);
1089 * Get the next token from a string, return false if none found. Handles
1090 * double-quotes. This version does not trim leading separator characters
1091 * before looking for a token.
1094 bool next_token_no_ltrim_talloc(TALLOC_CTX
*ctx
,
1099 return next_token_internal_talloc(ctx
, ptr
, pp_buff
, sep
, false);
1103 * Get the next token from a string, return False if none found.
1104 * Handles double-quotes.
1106 * Based on a routine by GJC@VILLAGE.COM.
1107 * Extensively modified by Andrew.Tridgell@anu.edu.au
1109 _PUBLIC_
bool next_token(const char **ptr
,char *buff
, const char *sep
, size_t bufsize
)
1120 /* default to simple separators */
1124 /* find the first non sep char */
1125 while (*s
&& strchr_m(sep
,*s
))
1132 /* copy over the token */
1133 for (quoted
= false; len
< bufsize
&& *s
&& (quoted
|| !strchr_m(sep
,*s
)); s
++) {
1142 *ptr
= (*s
) ? s
+1 : s
;
1148 struct anonymous_shared_header
{
1155 /* Map a shared memory buffer of at least nelem counters. */
1156 void *anonymous_shared_allocate(size_t orig_bufsz
)
1160 size_t pagesz
= getpagesize();
1162 size_t bufsz
= orig_bufsz
;
1163 struct anonymous_shared_header
*hdr
;
1165 bufsz
+= sizeof(*hdr
);
1167 /* round up to full pages */
1168 pagecnt
= bufsz
/ pagesz
;
1169 if (bufsz
% pagesz
) {
1172 bufsz
= pagesz
* pagecnt
;
1174 if (orig_bufsz
>= bufsz
) {
1182 buf
= mmap(NULL
, bufsz
, PROT_READ
|PROT_WRITE
, MAP_ANON
|MAP_SHARED
,
1183 -1 /* fd */, 0 /* offset */);
1189 fd
= open("/dev/zero", O_RDWR
);
1194 buf
= mmap(NULL
, bufsz
, PROT_READ
|PROT_WRITE
, MAP_FILE
|MAP_SHARED
,
1195 fd
, 0 /* offset */);
1196 saved_errno
= errno
;
1198 errno
= saved_errno
;
1202 if (buf
== MAP_FAILED
) {
1206 hdr
= (struct anonymous_shared_header
*)buf
;
1207 hdr
->u
.length
= bufsz
;
1209 ptr
= (void *)(&hdr
[1]);
1214 void *anonymous_shared_resize(void *ptr
, size_t new_size
, bool maymove
)
1218 size_t pagesz
= getpagesize();
1221 struct anonymous_shared_header
*hdr
;
1229 hdr
= (struct anonymous_shared_header
*)ptr
;
1231 if (hdr
->u
.length
> (new_size
+ sizeof(*hdr
))) {
1236 bufsz
= new_size
+ sizeof(*hdr
);
1238 /* round up to full pages */
1239 pagecnt
= bufsz
/ pagesz
;
1240 if (bufsz
% pagesz
) {
1243 bufsz
= pagesz
* pagecnt
;
1245 if (new_size
>= bufsz
) {
1251 if (bufsz
<= hdr
->u
.length
) {
1256 flags
= MREMAP_MAYMOVE
;
1259 buf
= mremap(hdr
, hdr
->u
.length
, bufsz
, flags
);
1261 if (buf
== MAP_FAILED
) {
1266 hdr
= (struct anonymous_shared_header
*)buf
;
1267 hdr
->u
.length
= bufsz
;
1269 ptr
= (void *)(&hdr
[1]);
1278 void anonymous_shared_free(void *ptr
)
1280 struct anonymous_shared_header
*hdr
;
1286 hdr
= (struct anonymous_shared_header
*)ptr
;
1290 munmap(hdr
, hdr
->u
.length
);
1294 /* used when you want a debugger started at a particular point in the
1295 code. Mostly useful in code that runs as a child process, where
1296 normal gdb attach is harder to organise.
1298 void samba_start_debugger(void)
1301 if (asprintf(&cmd
, "xterm -e \"gdb --pid %u\"&", getpid()) == -1) {
1304 if (system(cmd
) == -1) {