lib/util/samba_util.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Utility functions for Samba
   4    Copyright (C) Andrew Tridgell 1992-1999
   5    Copyright (C) Jelmer Vernooij 2005
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #ifndef _SAMBA_UTIL_H_
  22 #define _SAMBA_UTIL_H_
  23
  24 #ifndef SAMBA_UTIL_CORE_ONLY
  25 #include "lib/util/charset/charset.h"
  26 #else
  27 #include "charset_compat.h"
  28 #endif
  29
  30 #include "lib/util/attr.h"
  31
  32 /* for TALLOC_CTX */
  33 #include <talloc.h>
  34
  35 /* for struct stat */
  36 #include <sys/stat.h>
  37
  38 /**
  39  * @file
  40  * @brief Helpful macros
  41  */
  42
  43 struct smbsrv_tcon;
  44
  45 extern const char *panic_action;
  46
  47 #include "lib/util/time.h"
  48 #include "lib/util/data_blob.h"
  49 #include "lib/util/byteorder.h"
  50 #include "lib/util/talloc_stack.h"
  51 #include "lib/util/talloc_keep_secret.h"
  52
  53 #ifndef ABS
  54 #define ABS(a) ((a)>0?(a):(-(a)))
  55 #endif
  56
  57 #include "lib/util/memory.h"
  58 #include "lib/util/discard.h"
  59
  60 #include "fault.h"
  61
  62 #include "lib/util/util.h"
  63
  64 /**
  65  * Write backtrace to debug log
  66  */
  67 _PUBLIC_ void dump_core_setup(const char *progname, const char *logfile);
  68
  69 /**
  70   register a fault handler.
  71   Should only be called once in the execution of smbd.
  72 */
  73 _PUBLIC_ bool register_fault_handler(const char *name, void (*fault_handler)(int sig));
  74
  75 #include "lib/util/signal.h" /* Avoid /usr/include/signal.h */
  76
  77 struct sockaddr;
  78
  79 _PUBLIC_ int sys_getnameinfo(const struct sockaddr *psa,
  80                              int salen,
  81                              char *host,
  82                              size_t hostlen,
  83                              char *service,
  84                              size_t servlen,
  85                              int flags);
  86
  87 /* The following definitions come from lib/util/genrand.c  */
  88
  89 #include "lib/util/genrand.h"
  90
  91 /**
  92   generate a single random uint32_t
  93 **/
  94 _PUBLIC_ uint32_t generate_random(void);
  95
  96 /**
  97   generate a single random uint64_t
  98 **/
  99 _PUBLIC_ uint64_t generate_random_u64(void);
 100
 101 /**
 102   very basic password quality checker
 103 **/
 104 _PUBLIC_ bool check_password_quality(const char *s);
 105
 106 /**
 107  * Generate a random text password (based on printable ascii characters).
 108  * This function is designed to provide a password that
 109  * meats the complexity requirements of UF_NORMAL_ACCOUNT objects
 110  * and they should be human readable and writeable on any keyboard layout.
 111  *
 112  * Characters used are:
 113  * ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,@$%&!?:;<=>()[]~
 114  */
 115 _PUBLIC_ char *generate_random_password(TALLOC_CTX *mem_ctx, size_t min, size_t max);
 116
 117 /**
 118  * Generate a random machine password
 119  *
 120  * min and max are the number of utf16 characters used
 121  * to generate on utf8 compatible password.
 122  *
 123  * Note: if 'unix charset' is not 'utf8' (the default)
 124  * then each utf16 character is only filled with
 125  * values from 0x01 to 0x7f (ascii values without 0x00).
 126  * This is important as the password neets to be
 127  * a valid value as utf8 string and at the same time
 128  * a valid value in the 'unix charset'.
 129  *
 130  * If 'unix charset' is 'utf8' (the default) then
 131  * each utf16 character is a random value from 0x0000
 132  * 0xFFFF (exluding the surrogate ranges from 0xD800-0xDFFF)
 133  * while the translation from CH_UTF16MUNGED
 134  * to CH_UTF8 replaces invalid values (see utf16_munged_pull()).
 135  *
 136  * Note: these passwords may not pass the complexity requirements
 137  * for UF_NORMAL_ACCOUNT objects (except krbtgt accounts).
 138  */
 139 _PUBLIC_ char *generate_random_machine_password(TALLOC_CTX *mem_ctx, size_t min, size_t max);
 140
 141 /**
 142  Use the random number generator to generate a random string.
 143 **/
 144 _PUBLIC_ char *generate_random_str_list(TALLOC_CTX *mem_ctx, size_t len, const char *list);
 145
 146 /**
 147  * Generate a random text string consisting of the specified length.
 148  * The returned string will be allocated.
 149  *
 150  * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
 151  */
 152 _PUBLIC_ char *generate_random_str(TALLOC_CTX *mem_ctx, size_t len);
 153
 154 /**
 155  * Generate an array of unique text strings all of the same length.
 156  * The returned strings will be allocated.
 157  * Returns NULL if the number of unique combinations cannot be created.
 158  *
 159  * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
 160  */
 161 _PUBLIC_ char** generate_unique_strs(TALLOC_CTX *mem_ctx, size_t len,
 162                                          uint32_t num);
 163
 164 /* The following definitions come from lib/util/dprintf.c  */
 165
 166 _PUBLIC_ int d_fprintf(FILE *f, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
 167 _PUBLIC_ int d_printf(const char *format, ...) PRINTF_ATTRIBUTE(1,2);
 168 _PUBLIC_ void display_set_stderr(void);
 169
 170 /* The following definitions come from lib/util/util_str.c  */
 171
 172 bool next_token_talloc(TALLOC_CTX *ctx,
 173                         const char **ptr,
 174                         char **pp_buff,
 175                         const char *sep);
 176
 177 /**
 178  * Get the next token from a string, return false if none found.  Handles
 179  * double-quotes.  This version does not trim leading separator characters
 180  * before looking for a token.
 181  */
 182 bool next_token_no_ltrim_talloc(TALLOC_CTX *ctx,
 183                         const char **ptr,
 184                         char **pp_buff,
 185                         const char *sep);
 186
 187
 188 /**
 189  Trim the specified elements off the front and back of a string.
 190 **/
 191 _PUBLIC_ bool trim_string(char *s, const char *front, const char *back);
 192
 193 /**
 194  Find the number of 'c' chars in a string
 195 **/
 196 _PUBLIC_ _PURE_ size_t count_chars(const char *s, char c);
 197
 198 /**
 199  Routine to get hex characters and turn them into a 16 byte array.
 200  the array can be variable length, and any non-hex-numeric
 201  characters are skipped.  "0xnn" or "0Xnn" is specially catered
 202  for.
 203
 204  valid examples: "0A5D15"; "0x15, 0x49, 0xa2"; "59\ta9\te3\n"
 205
 206
 207 **/
 208 _PUBLIC_ size_t strhex_to_str(char *p, size_t p_len, const char *strhex, size_t strhex_len);
 209
 210 /**
 211  * Parse a hex string and return a data blob.
 212  */
 213 _PUBLIC_ _PURE_ DATA_BLOB strhex_to_data_blob(TALLOC_CTX *mem_ctx, const char *strhex) ;
 214
 215 /**
 216  * Parse a hex dump and return a data blob
 217  */
 218 _PUBLIC_ _PURE_ DATA_BLOB hexdump_to_data_blob(TALLOC_CTX *mem_ctx, const char *hexdump, size_t len);
 219
 220 /**
 221  * Print a buf in hex. Assumes dst is at least (srclen*2)+1 large.
 222  */
 223 _PUBLIC_ void hex_encode_buf(char *dst, const uint8_t *src, size_t srclen);
 224
 225 /**
 226  * talloc version of hex_encode_buf()
 227  */
 228 _PUBLIC_ char *hex_encode_talloc(TALLOC_CTX *mem_ctx, const unsigned char *buff_in, size_t len);
 229
 230 #include "substitute.h"
 231
 232 /**
 233  Unescape a URL encoded string, in place.
 234 **/
 235 _PUBLIC_ char *rfc1738_unescape(char *buf);
 236
 237 /**
 238  * rfc1738_escape_part
 239  * Returns a static buffer that contains the RFC
 240  * 1738 compliant, escaped version of the given url segment. (escapes
 241  * unsafe, reserved and % chars) It would mangle the :// in http://,
 242  * and mangle paths (because of /).
 243  **/
 244 _PUBLIC_ char *rfc1738_escape_part(TALLOC_CTX *mem_ctx, const char *url);
 245
 246 /**
 247   varient of strcmp() that handles NULL ptrs
 248 **/
 249 _PUBLIC_ int strcmp_safe(const char *s1, const char *s2);
 250
 251 /**
 252 return the number of bytes occupied by a buffer in ASCII format
 253 the result includes the null termination
 254 limited by 'n' bytes
 255 **/
 256 _PUBLIC_ size_t ascii_len_n(const char *src, size_t n);
 257
 258 /**
 259  Set a boolean variable from the text value stored in the passed string.
 260  Returns true in success, false if the passed string does not correctly
 261  represent a boolean.
 262 **/
 263 _PUBLIC_ bool set_boolean(const char *boolean_string, bool *boolean);
 264
 265 /**
 266  * Parse a string containing a boolean value.
 267  *
 268  * val will be set to the read value.
 269  *
 270  * @retval true if a boolean value was parsed, false otherwise.
 271  */
 272 _PUBLIC_ bool conv_str_bool(const char * str, bool * val);
 273
 274 /**
 275  * Convert a size specification like 16K into an integral number of bytes.
 276  **/
 277 _PUBLIC_ bool conv_str_size_error(const char * str, uint64_t * val);
 278
 279 /**
 280  * Parse a uint64_t value from a string
 281  *
 282  * val will be set to the value read.
 283  *
 284  * @retval true if parsing was successful, false otherwise
 285  */
 286 _PUBLIC_ bool conv_str_u64(const char * str, uint64_t * val);
 287
 288 /**
 289 return the number of bytes occupied by a buffer in CH_UTF16 format
 290 the result includes the null termination
 291 **/
 292 _PUBLIC_ size_t utf16_len(const void *buf);
 293
 294 /**
 295 return the number of bytes occupied by a buffer in CH_UTF16 format
 296 the result includes the null termination
 297 limited by 'n' bytes
 298 **/
 299 _PUBLIC_ size_t utf16_len_n(const void *src, size_t n);
 300 _PUBLIC_ size_t ucs2_align(const void *base_ptr, const void *p, int flags);
 301
 302 /**
 303  * @brief Constant time compare to memory regions.
 304  *
 305  * @param[in]  s1  The first memory region to compare.
 306  *
 307  * @param[in]  s2  The second memory region to compare.
 308  *
 309  * @param[in]  n   The length of the memory to comapre.
 310  *
 311  * @return 0 when the memory regions are equal, 0 if not.
 312  */
 313 _PUBLIC_ int memcmp_const_time(const void *s1, const void *s2, size_t n);
 314
 315 /**
 316 Do a case-insensitive, whitespace-ignoring string compare.
 317 **/
 318 _PUBLIC_ int strwicmp(const char *psz1, const char *psz2);
 319
 320 /**
 321  String replace.
 322 **/
 323 _PUBLIC_ void string_replace(char *s, char oldc, char newc);
 324
 325 /**
 326  * Compare 2 strings.
 327  *
 328  * @note The comparison is case-insensitive.
 329  **/
 330 _PUBLIC_ bool strequal(const char *s1, const char *s2);
 331
 332 #include "util_strlist.h"
 333
 334 /* The following definitions come from lib/util/util_strlist_v3.c  */
 335
 336 /**
 337  * Needed for making an "unconst" list "const"
 338  */
 339 _PUBLIC_ const char **const_str_list(char **list);
 340
 341 /**
 342  * str_list_make, v3 version. The v4 version does not
 343  * look at quoted strings with embedded blanks, so
 344  * do NOT merge this function please!
 345  */
 346 char **str_list_make_v3(TALLOC_CTX *mem_ctx, const char *string,
 347         const char *sep);
 348
 349
 350 const char **str_list_make_v3_const(TALLOC_CTX *mem_ctx,
 351                                     const char *string,
 352                                     const char *sep);
 353
 354 /* The following definitions come from lib/util/util_file.c  */
 355
 356
 357 /**
 358  * Read one line (data until next newline or eof) and allocate it
 359  */
 360 _PUBLIC_ char *afdgets(int fd, TALLOC_CTX *mem_ctx, size_t hint);
 361
 362 char *fgets_slash(TALLOC_CTX *mem_ctx, char *s2, size_t maxlen, FILE *f);
 363
 364 /**
 365 load a file into memory from a fd.
 366 **/
 367 _PUBLIC_ char *fd_load(int fd, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
 368
 369
 370 char **file_lines_parse(char *p, size_t size, int *numlines, TALLOC_CTX *mem_ctx);
 371
 372 /**
 373 load a file into memory
 374 **/
 375 _PUBLIC_ char *file_load(const char *fname, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
 376
 377 /**
 378 load a file into memory and return an array of pointers to lines in the file
 379 must be freed with talloc_free().
 380 **/
 381 _PUBLIC_ char **file_lines_load(const char *fname, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
 382
 383 /**
 384 load a fd into memory and return an array of pointers to lines in the file
 385 must be freed with talloc_free(). If convert is true calls unix_to_dos on
 386 the list.
 387 **/
 388 _PUBLIC_ char **fd_lines_load(int fd, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
 389
 390 _PUBLIC_ bool file_save_mode(const char *fname, const void *packet,
 391                              size_t length, mode_t mode);
 392 /**
 393   save a lump of data into a file. Mostly used for debugging
 394 */
 395 _PUBLIC_ bool file_save(const char *fname, const void *packet, size_t length);
 396 _PUBLIC_ int vfdprintf(int fd, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
 397 _PUBLIC_ int fdprintf(int fd, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
 398
 399 /*
 400   compare two files, return true if the two files have the same content
 401  */
 402 bool file_compare(const char *path1, const char *path2);
 403
 404 /*
 405   load from a pipe into memory.
 406  */
 407 char *file_ploadv(char * const argl[], size_t *size);
 408
 409 /* The following definitions come from lib/util/util.c  */
 410
 411
 412 /**
 413  Find a suitable temporary directory. The result should be copied immediately
 414  as it may be overwritten by a subsequent call.
 415 **/
 416 _PUBLIC_ const char *tmpdir(void);
 417
 418 /**
 419  * Creates and immediately unlinks a file. Returns open file descriptor.
 420  **/
 421 _PUBLIC_ int create_unlink_tmp(const char *dir);
 422
 423 /**
 424  Check if a file exists - call vfs_file_exist for samba files.
 425 **/
 426 _PUBLIC_ bool file_exist(const char *fname);
 427
 428 /**
 429  Check a files mod time.
 430 **/
 431 _PUBLIC_ time_t file_modtime(const char *fname);
 432
 433 /**
 434  Check if a directory exists.
 435 **/
 436 _PUBLIC_ bool directory_exist(const char *dname);
 437
 438 /**
 439  Check file permissions.
 440 **/
 441 _PUBLIC_ bool file_check_permissions(const char *fname,
 442                                      uid_t uid,
 443                                      mode_t file_perms,
 444                                      struct stat *pst);
 445
 446 /**
 447  * Try to create the specified directory if it didn't exist.
 448  *
 449  * @retval true if the directory already existed and has the right permissions
 450  * or was successfully created.
 451  */
 452 _PUBLIC_ bool directory_create_or_exist(const char *dname, mode_t dir_perms);
 453
 454 _PUBLIC_ bool directory_create_or_exist_strict(const char *dname,
 455                                                uid_t uid,
 456                                                mode_t dir_perms);
 457
 458 #include "blocking.h"
 459
 460 /**
 461  Sleep for a specified number of milliseconds.
 462 **/
 463 _PUBLIC_ void smb_msleep(unsigned int t);
 464
 465 /**
 466  Get my own name, return in talloc'ed storage.
 467 **/
 468 _PUBLIC_ char* get_myname(TALLOC_CTX *mem_ctx);
 469
 470 /**
 471  Check if a process exists. Does this work on all unixes?
 472 **/
 473 _PUBLIC_ bool process_exists_by_pid(pid_t pid);
 474
 475 /**
 476  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
 477  is dealt with in posix.c
 478 **/
 479 _PUBLIC_ bool fcntl_lock(int fd, int op, off_t offset, off_t count, int type);
 480
 481 /**
 482  * Write dump of binary data to the log file.
 483  *
 484  * The data is only written if the log level is at least level.
 485  * 16 zero bytes in a row are omitted
 486  */
 487 _PUBLIC_ void dump_data_skip_zeros(int level, const uint8_t *buf, int len);
 488
 489 /**
 490  malloc that aborts with smb_panic on fail or zero size.
 491 **/
 492 _PUBLIC_ void *smb_xmalloc(size_t size);
 493
 494 /**
 495  Memdup with smb_panic on fail.
 496 **/
 497 _PUBLIC_ void *smb_xmemdup(const void *p, size_t size);
 498
 499 /**
 500  strdup that aborts on malloc fail.
 501 **/
 502 _PUBLIC_ char *smb_xstrdup(const char *s);
 503
 504 char *smb_xstrndup(const char *s, size_t n);
 505
 506 /**
 507  Like strdup but for memory.
 508 **/
 509 _PUBLIC_ void *smb_memdup(const void *p, size_t size);
 510
 511 /**
 512  * Write a password to the log file.
 513  *
 514  * @note Only actually does something if DEBUG_PASSWORD was defined during
 515  * compile-time.
 516  */
 517 _PUBLIC_ void dump_data_pw(const char *msg, const uint8_t * data, size_t len);
 518
 519 /**
 520  * see if a range of memory is all zero. A NULL pointer is considered
 521  * to be all zero
 522  */
 523 _PUBLIC_ bool all_zero(const uint8_t *ptr, size_t size);
 524
 525 /**
 526   realloc an array, checking for integer overflow in the array size
 527 */
 528 _PUBLIC_ void *realloc_array(void *ptr, size_t el_size, unsigned count, bool free_on_fail);
 529
 530 void *malloc_array(size_t el_size, unsigned int count);
 531
 532 void *memalign_array(size_t el_size, size_t align, unsigned int count);
 533
 534 void *calloc_array(size_t size, size_t nmemb);
 535
 536 /* The following definitions come from lib/util/fsusage.c  */
 537
 538
 539 /**
 540  * Retrieve amount of free disk space.
 541  * this does all of the system specific guff to get the free disk space.
 542  * It is derived from code in the GNU fileutils package, but has been
 543  * considerably mangled for use here
 544  *
 545  * results are returned in *dfree and *dsize, in 512 byte units
 546 */
 547 _PUBLIC_ int sys_fsusage(const char *path, uint64_t *dfree, uint64_t *dsize);
 548
 549 /* The following definitions come from lib/util/ms_fnmatch.c  */
 550
 551
 552 /**
 553  * @file
 554  * @brief MS-style Filename matching
 555  */
 556
 557 int ms_fnmatch_protocol(const char *pattern, const char *string, int protocol,
 558                         bool is_case_sensitive);
 559
 560 /** a generic fnmatch function - uses for non-CIFS pattern matching */
 561 int gen_fnmatch(const char *pattern, const char *string);
 562
 563 #include "idtree.h"
 564 #include "idtree_random.h"
 565
 566 #include "become_daemon.h"
 567
 568 /**
 569  * @brief Get a password from the console.
 570  *
 571  * You should make sure that the buffer is an empty string!
 572  *
 573  * You can also use this function to ask for a username. Then you can fill the
 574  * buffer with the username and it is shows to the users. If the users just
 575  * presses enter the buffer will be untouched.
 576  *
 577  * @code
 578  *   char username[128];
 579  *
 580  *   snprintf(username, sizeof(username), "john");
 581  *
 582  *   smb_getpass("Username:", username, sizeof(username), 1, 0);
 583  * @endcode
 584  *
 585  * The prompt will look like this:
 586  *
 587  *   Username: [john]
 588  *
 589  * If you press enter then john is used as the username, or you can type it in
 590  * to change it.
 591  *
 592  * @param[in]  prompt   The prompt to show to ask for the password.
 593  *
 594  * @param[out] buf    The buffer the password should be stored. It NEEDS to be
 595  *                    empty or filled out.
 596  *
 597  * @param[in]  len      The length of the buffer.
 598  *
 599  * @param[in]  echo     Should we echo what you type.
 600  *
 601  * @param[in]  verify   Should we ask for the password twice.
 602  *
 603  * @return              0 on success, -1 on error.
 604  */
 605 _PUBLIC_ int samba_getpass(const char *prompt, char *buf, size_t len,
 606                            bool echo, bool verify);
 607
 608 /**
 609  * Load a ini-style file.
 610  */
 611 bool pm_process( const char *fileName,
 612                  bool (*sfunc)(const char *, void *),
 613                  bool (*pfunc)(const char *, const char *, void *),
 614                                  void *userdata);
 615 bool pm_process_with_flags(const char *filename,
 616                            bool allow_empty_values,
 617                            bool (*sfunc)(const char *section, void *private_data),
 618                            bool (*pfunc)(const char *name, const char *value,
 619                                          void *private_data),
 620                            void *private_data);
 621
 622 void print_asc(int level, const uint8_t *buf,int len);
 623 void print_asc_cb(const uint8_t *buf, int len,
 624                   void (*cb)(const char *buf, void *private_data),
 625                   void *private_data);
 626
 627 /**
 628  * Add an id to an array of ids.
 629  *
 630  * num should be a pointer to an integer that holds the current
 631  * number of elements in ids. It will be updated by this function.
 632  */
 633
 634 bool add_uid_to_array_unique(TALLOC_CTX *mem_ctx, uid_t uid,
 635                              uid_t **uids, uint32_t *num_uids);
 636 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
 637                              gid_t **gids, uint32_t *num_gids);
 638
 639 /**
 640  * Allocate anonymous shared memory of the given size
 641  */
 642 void *anonymous_shared_allocate(size_t bufsz);
 643 void *anonymous_shared_resize(void *ptr, size_t new_size, bool maymove);
 644 void anonymous_shared_free(void *ptr);
 645
 646 /*
 647   run a command as a child process, with a timeout.
 648
 649   any stdout/stderr from the child will appear in the Samba logs with
 650   the specified log levels
 651
 652   If callback is set then the callback is called on completion
 653   with the return code from the command
 654  */
 655 struct tevent_context;
 656 struct tevent_req;
 657 struct tevent_req *samba_runcmd_send(TALLOC_CTX *mem_ctx,
 658                                      struct tevent_context *ev,
 659                                      struct timeval endtime,
 660                                      int stdout_log_level,
 661                                      int stderr_log_level,
 662                                      const char * const *argv0, ...);
 663 int samba_runcmd_recv(struct tevent_req *req, int *perrno);
 664 int samba_runcmd_export_stdin(struct tevent_req *req);
 665
 666 #ifdef DEVELOPER
 667 void samba_start_debugger(void);
 668 #endif
 669
 670 /*
 671  * Samba code should use samba_tevent_context_init() instead of
 672  * tevent_context_init() in order to get the debug output.
 673  */
 674 struct tevent_context *samba_tevent_context_init(TALLOC_CTX *mem_ctx);
 675
 676 /*
 677  * if same samba code needs to use a specific tevent backend
 678  * it can use something like this:
 679  *
 680  * samba_tevent_set_debug(ev, "pysmb_tevent");
 681  */
 682 void samba_tevent_set_debug(struct tevent_context *ev, const char *name);
 683
 684 #endif /* _SAMBA_UTIL_H_ */