lib/util/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 #if _SAMBA_BUILD_ == 4
  25 #include "../lib/util/charset/charset.h"
  26 #endif
  27 #include "../lib/util/attr.h"
  28
  29 /* for TALLOC_CTX */
  30 #include <talloc.h>
  31
  32 /**
  33  * @file
  34  * @brief Helpful macros
  35  */
  36
  37 struct smbsrv_tcon;
  38
  39 extern const char *logfile;
  40 extern const char *panic_action;
  41
  42 #include "../lib/util/time.h"
  43 #include "../lib/util/data_blob.h"
  44 #include "../lib/util/xfile.h"
  45 #include "../lib/util/mutex.h"
  46 #include "../lib/util/byteorder.h"
  47 #include "../lib/util/talloc_stack.h"
  48
  49 /**
  50  * assert macros
  51  */
  52 #ifdef DEVELOPER
  53 #define SMB_ASSERT(b) do { if (!(b)) { \
  54         DEBUG(0,("PANIC: assert failed at %s(%d): %s\n", \
  55                  __FILE__, __LINE__, #b)); smb_panic("assert failed: " #b); }} while(0)
  56 #else
  57 /* redefine the assert macro for non-developer builds */
  58 #define SMB_ASSERT(b) do { if (!(b)) { \
  59         DEBUG(0,("PANIC: assert failed at %s(%d): %s\n", \
  60             __FILE__, __LINE__, #b)); }} while (0)
  61 #endif
  62
  63 #if _SAMBA_BUILD_ == 4
  64 #ifdef VALGRIND
  65 #define strlen(x) valgrind_strlen(x)
  66 size_t valgrind_strlen(const char *s);
  67 #endif
  68 #endif
  69
  70 #ifndef ABS
  71 #define ABS(a) ((a)>0?(a):(-(a)))
  72 #endif
  73
  74 #include "../lib/util/memory.h"
  75
  76 /**
  77  * Write backtrace to debug log
  78  */
  79 _PUBLIC_ void call_backtrace(void);
  80
  81 /**
  82  Something really nasty happened - panic !
  83 **/
  84 _PUBLIC_ _NORETURN_ void smb_panic(const char *why);
  85
  86 #if _SAMBA_BUILD_ == 4
  87 /**
  88 setup our fault handlers
  89 **/
  90 _PUBLIC_ void fault_setup(const char *pname);
  91 #endif
  92
  93 /**
  94   register a fault handler.
  95   Should only be called once in the execution of smbd.
  96 */
  97 _PUBLIC_ bool register_fault_handler(const char *name, void (*fault_handler)(int sig));
  98
  99 /* The following definitions come from lib/util/signal.c  */
 100
 101
 102 /**
 103  Block sigs.
 104 **/
 105 void BlockSignals(bool block, int signum);
 106
 107 /**
 108  Catch a signal. This should implement the following semantics:
 109
 110  1) The handler remains installed after being called.
 111  2) The signal should be blocked during handler execution.
 112 **/
 113 void (*CatchSignal(int signum,void (*handler)(int )))(int);
 114
 115 /**
 116  Ignore SIGCLD via whatever means is necessary for this OS.
 117 **/
 118 void CatchChild(void);
 119
 120 /**
 121  Catch SIGCLD but leave the child around so it's status can be reaped.
 122 **/
 123 void CatchChildLeaveStatus(void);
 124
 125 /* The following definitions come from lib/util/system.c  */
 126
 127 /**************************************************************************
 128 A wrapper for gethostbyname() that tries avoids looking up hostnames
 129 in the root domain, which can cause dial-on-demand links to come up for no
 130 apparent reason.
 131 ****************************************************************************/
 132 _PUBLIC_ struct hostent *sys_gethostbyname(const char *name);
 133 _PUBLIC_ struct in_addr sys_inet_makeaddr(int net, int host);
 134
 135 /**
 136  * Wrapper for fork used to invalid pid cache.
 137  **/
 138 _PUBLIC_ pid_t sys_fork(void);
 139
 140 /**
 141  * Wrapper for getpid. Ensures we only do a system call *once*.
 142  **/
 143 _PUBLIC_ pid_t sys_getpid(void);
 144
 145 /* The following definitions come from lib/util/genrand.c  */
 146
 147 /**
 148  Copy any user given reseed data.
 149 **/
 150 _PUBLIC_ void set_rand_reseed_callback(void (*fn)(void *, int *), void *);
 151
 152 /**
 153  * Tell the random number generator it needs to reseed.
 154  */
 155 _PUBLIC_ void set_need_random_reseed(void);
 156
 157 /**
 158  Interface to the (hopefully) good crypto random number generator.
 159  Will use our internal PRNG if more than 40 bytes of random generation
 160  has been requested, otherwise tries to read from /dev/random
 161 **/
 162 _PUBLIC_ void generate_random_buffer(uint8_t *out, int len);
 163
 164 /**
 165  Interface to the (hopefully) good crypto random number generator.
 166  Will always use /dev/urandom if available.
 167 **/
 168 _PUBLIC_ void generate_secret_buffer(uint8_t *out, int len);
 169
 170 /**
 171   generate a single random uint32_t
 172 **/
 173 _PUBLIC_ uint32_t generate_random(void);
 174
 175 /**
 176   very basic password quality checker
 177 **/
 178 _PUBLIC_ bool check_password_quality(const char *s);
 179
 180 /**
 181  * Generate a random text password.
 182  */
 183 _PUBLIC_ char *generate_random_password(TALLOC_CTX *mem_ctx, size_t min, size_t max);
 184
 185 /**
 186  Use the random number generator to generate a random string.
 187 **/
 188 _PUBLIC_ char *generate_random_str_list(TALLOC_CTX *mem_ctx, size_t len, const char *list);
 189
 190 /**
 191  * Generate a random text string consisting of the specified length.
 192  * The returned string will be allocated.
 193  *
 194  * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
 195  */
 196 _PUBLIC_ char *generate_random_str(TALLOC_CTX *mem_ctx, size_t len);
 197
 198 /**
 199  * Generate an array of unique text strings all of the same length.
 200  * The returned strings will be allocated.
 201  * Returns NULL if the number of unique combinations cannot be created.
 202  *
 203  * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
 204  */
 205 _PUBLIC_ char** generate_unique_strs(TALLOC_CTX *mem_ctx, size_t len,
 206                                          uint32_t num);
 207
 208 /* The following definitions come from lib/util/dprintf.c  */
 209 #if _SAMBA_BUILD_ == 4
 210
 211 _PUBLIC_ void d_set_iconv(smb_iconv_t);
 212 _PUBLIC_ int d_vfprintf(FILE *f, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
 213 _PUBLIC_ int d_fprintf(FILE *f, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
 214 _PUBLIC_ int d_printf(const char *format, ...) PRINTF_ATTRIBUTE(1,2);
 215 _PUBLIC_ void display_set_stderr(void);
 216 #endif
 217
 218 /* The following definitions come from lib/util/util_str.c  */
 219
 220 bool next_token_talloc(TALLOC_CTX *ctx,
 221                         const char **ptr,
 222                         char **pp_buff,
 223                         const char *sep);
 224
 225 /**
 226  * Get the next token from a string, return false if none found.  Handles
 227  * double-quotes.  This version does not trim leading separator characters
 228  * before looking for a token.
 229  */
 230 bool next_token_no_ltrim_talloc(TALLOC_CTX *ctx,
 231                         const char **ptr,
 232                         char **pp_buff,
 233                         const char *sep);
 234
 235
 236 /**
 237  Trim the specified elements off the front and back of a string.
 238 **/
 239 _PUBLIC_ bool trim_string(char *s, const char *front, const char *back);
 240
 241 /**
 242  Find the number of 'c' chars in a string
 243 **/
 244 _PUBLIC_ _PURE_ size_t count_chars(const char *s, char c);
 245
 246 /**
 247  Safe string copy into a known length string. maxlength does not
 248  include the terminating zero.
 249 **/
 250 _PUBLIC_ char *safe_strcpy(char *dest,const char *src, size_t maxlength);
 251
 252 /**
 253  Safe string cat into a string. maxlength does not
 254  include the terminating zero.
 255 **/
 256 _PUBLIC_ char *safe_strcat(char *dest, const char *src, size_t maxlength);
 257
 258 /**
 259  Routine to get hex characters and turn them into a 16 byte array.
 260  the array can be variable length, and any non-hex-numeric
 261  characters are skipped.  "0xnn" or "0Xnn" is specially catered
 262  for.
 263
 264  valid examples: "0A5D15"; "0x15, 0x49, 0xa2"; "59\ta9\te3\n"
 265
 266
 267 **/
 268 _PUBLIC_ size_t strhex_to_str(char *p, size_t p_len, const char *strhex, size_t strhex_len);
 269
 270 /**
 271  * Parse a hex string and return a data blob.
 272  */
 273 _PUBLIC_ _PURE_ DATA_BLOB strhex_to_data_blob(TALLOC_CTX *mem_ctx, const char *strhex) ;
 274
 275 /**
 276  * Routine to print a buffer as HEX digits, into an allocated string.
 277  */
 278 _PUBLIC_ void hex_encode(const unsigned char *buff_in, size_t len, char **out_hex_buffer);
 279
 280 /**
 281  * talloc version of hex_encode()
 282  */
 283 _PUBLIC_ char *hex_encode_talloc(TALLOC_CTX *mem_ctx, const unsigned char *buff_in, size_t len);
 284
 285 /**
 286  Substitute a string for a pattern in another string. Make sure there is
 287  enough room!
 288
 289  This routine looks for pattern in s and replaces it with
 290  insert. It may do multiple replacements.
 291
 292  Any of " ; ' $ or ` in the insert string are replaced with _
 293  if len==0 then the string cannot be extended. This is different from the old
 294  use of len==0 which was for no length checks to be done.
 295 **/
 296 _PUBLIC_ void string_sub(char *s,const char *pattern, const char *insert, size_t len);
 297
 298
 299 _PUBLIC_ char *string_sub_talloc(TALLOC_CTX *mem_ctx, const char *s,
 300                                 const char *pattern, const char *insert);
 301
 302 /**
 303  Similar to string_sub() but allows for any character to be substituted.
 304  Use with caution!
 305  if len==0 then the string cannot be extended. This is different from the old
 306  use of len==0 which was for no length checks to be done.
 307 **/
 308 _PUBLIC_ void all_string_sub(char *s,const char *pattern,const char *insert, size_t len);
 309
 310 /**
 311  Unescape a URL encoded string, in place.
 312 **/
 313 _PUBLIC_ void rfc1738_unescape(char *buf);
 314
 315
 316 /**
 317  * rfc1738_escape
 318  * Returns a static buffer that contains the RFC
 319  * 1738 compliant, escaped version of the given url. (escapes unsafe and % characters)
 320  **/
 321 _PUBLIC_ char *rfc1738_escape(TALLOC_CTX *mem_ctx, const char *url);
 322
 323 /**
 324  * rfc1738_escape_unescaped
 325  *
 326  * Returns a static buffer that contains
 327  * the RFC 1738 compliant, escaped version of the given url (escapes unsafe chars only)
 328  **/
 329 _PUBLIC_ char *rfc1738_escape_unescaped(TALLOC_CTX *mem_ctx, const char *url);
 330
 331 /**
 332  * rfc1738_escape_part
 333  * Returns a static buffer that contains the RFC
 334  * 1738 compliant, escaped version of the given url segment. (escapes
 335  * unsafe, reserved and % chars) It would mangle the :// in http://,
 336  * and mangle paths (because of /).
 337  **/
 338 _PUBLIC_ char *rfc1738_escape_part(TALLOC_CTX *mem_ctx, const char *url);
 339
 340 /**
 341   format a string into length-prefixed dotted domain format, as used in NBT
 342   and in some ADS structures
 343 **/
 344 _PUBLIC_ const char *str_format_nbt_domain(TALLOC_CTX *mem_ctx, const char *s);
 345
 346 /**
 347  * Add a string to an array of strings.
 348  *
 349  * num should be a pointer to an integer that holds the current
 350  * number of elements in strings. It will be updated by this function.
 351  */
 352 _PUBLIC_ bool add_string_to_array(TALLOC_CTX *mem_ctx,
 353                          const char *str, const char ***strings, int *num);
 354
 355 /**
 356   varient of strcmp() that handles NULL ptrs
 357 **/
 358 _PUBLIC_ int strcmp_safe(const char *s1, const char *s2);
 359
 360 /**
 361 return the number of bytes occupied by a buffer in ASCII format
 362 the result includes the null termination
 363 limited by 'n' bytes
 364 **/
 365 _PUBLIC_ size_t ascii_len_n(const char *src, size_t n);
 366
 367 /**
 368  Set a boolean variable from the text value stored in the passed string.
 369  Returns true in success, false if the passed string does not correctly
 370  represent a boolean.
 371 **/
 372 _PUBLIC_ bool set_boolean(const char *boolean_string, bool *boolean);
 373
 374 /**
 375  * Parse a string containing a boolean value.
 376  *
 377  * val will be set to the read value.
 378  *
 379  * @retval true if a boolean value was parsed, false otherwise.
 380  */
 381 _PUBLIC_ bool conv_str_bool(const char * str, bool * val);
 382
 383 #if _SAMBA_BUILD_ == 4
 384 /**
 385  * Convert a size specification like 16K into an integral number of bytes.
 386  **/
 387 _PUBLIC_ bool conv_str_size(const char * str, uint64_t * val);
 388 #endif
 389
 390 /**
 391  * Parse a uint64_t value from a string
 392  *
 393  * val will be set to the value read.
 394  *
 395  * @retval true if parsing was successful, false otherwise
 396  */
 397 _PUBLIC_ bool conv_str_u64(const char * str, uint64_t * val);
 398
 399 /**
 400 return the number of bytes occupied by a buffer in CH_UTF16 format
 401 the result includes the null termination
 402 **/
 403 _PUBLIC_ size_t utf16_len(const void *buf);
 404
 405 /**
 406 return the number of bytes occupied by a buffer in CH_UTF16 format
 407 the result includes the null termination
 408 limited by 'n' bytes
 409 **/
 410 _PUBLIC_ size_t utf16_len_n(const void *src, size_t n);
 411 _PUBLIC_ size_t ucs2_align(const void *base_ptr, const void *p, int flags);
 412
 413 /**
 414 Do a case-insensitive, whitespace-ignoring string compare.
 415 **/
 416 _PUBLIC_ int strwicmp(const char *psz1, const char *psz2);
 417
 418 /**
 419  String replace.
 420 **/
 421 _PUBLIC_ void string_replace(char *s, char oldc, char newc);
 422
 423 /**
 424  * Compare 2 strings.
 425  *
 426  * @note The comparison is case-insensitive.
 427  **/
 428 _PUBLIC_ bool strequal(const char *s1, const char *s2);
 429
 430 /* The following definitions come from lib/util/util_strlist.c  */
 431
 432 /* separators for lists */
 433 #ifndef LIST_SEP
 434 #define LIST_SEP " \t,\n\r"
 435 #endif
 436
 437 /**
 438   build an empty (only NULL terminated) list of strings (for expansion with str_list_add() etc)
 439 */
 440 _PUBLIC_ char **str_list_make_empty(TALLOC_CTX *mem_ctx);
 441
 442 /**
 443   place the only element 'entry' into a new, NULL terminated string list
 444 */
 445 _PUBLIC_ char **str_list_make_single(TALLOC_CTX *mem_ctx,
 446         const char *entry);
 447
 448 /**
 449   build a null terminated list of strings from a input string and a
 450   separator list. The separator list must contain characters less than
 451   or equal to 0x2f for this to work correctly on multi-byte strings
 452 */
 453 _PUBLIC_ char **str_list_make(TALLOC_CTX *mem_ctx, const char *string,
 454         const char *sep);
 455
 456 /**
 457  * build a null terminated list of strings from an argv-like input string
 458  * Entries are separated by spaces and can be enclosed by quotes.
 459  * Does NOT support escaping
 460  */
 461 _PUBLIC_ char **str_list_make_shell(TALLOC_CTX *mem_ctx, const char *string, const char *sep);
 462
 463 /**
 464  * join a list back to one string
 465  */
 466 _PUBLIC_ char *str_list_join(TALLOC_CTX *mem_ctx, const char **list, char separator);
 467
 468 /** join a list back to one (shell-like) string; entries
 469  * separated by spaces, using quotes where necessary */
 470 _PUBLIC_ char *str_list_join_shell(TALLOC_CTX *mem_ctx, const char **list, char sep);
 471
 472 /**
 473   return the number of elements in a string list
 474 */
 475 _PUBLIC_ size_t str_list_length(const char * const *list);
 476
 477 /**
 478   copy a string list
 479 */
 480 _PUBLIC_ char **str_list_copy(TALLOC_CTX *mem_ctx, const char **list);
 481
 482 /**
 483    Return true if all the elements of the list match exactly.
 484  */
 485 _PUBLIC_ bool str_list_equal(const char * const *list1, const char * const *list2);
 486
 487 /**
 488   add an entry to a string list
 489 */
 490 _PUBLIC_ const char **str_list_add(const char **list, const char *s);
 491
 492 /**
 493   remove an entry from a string list
 494 */
 495 _PUBLIC_ void str_list_remove(const char **list, const char *s);
 496
 497 /**
 498   return true if a string is in a list
 499 */
 500 _PUBLIC_ bool str_list_check(const char **list, const char *s);
 501
 502 /**
 503   return true if a string is in a list, case insensitively
 504 */
 505 _PUBLIC_ bool str_list_check_ci(const char **list, const char *s);
 506 /**
 507   append one list to another - expanding list1
 508 */
 509 _PUBLIC_ const char **str_list_append(const char **list1,
 510         const char * const *list2);
 511
 512 /**
 513  remove duplicate elements from a list
 514 */
 515 _PUBLIC_ const char **str_list_unique(const char **list);
 516
 517 /*
 518   very useful when debugging complex list related code
 519  */
 520 _PUBLIC_ void str_list_show(const char **list);
 521
 522
 523 /**
 524   append one list to another - expanding list1
 525   this assumes the elements of list2 are const pointers, so we can re-use them
 526 */
 527 _PUBLIC_ const char **str_list_append_const(const char **list1,
 528                                             const char **list2);
 529
 530 /**
 531   add an entry to a string list
 532   this assumes s will not change
 533 */
 534 _PUBLIC_ const char **str_list_add_const(const char **list, const char *s);
 535
 536 /**
 537   copy a string list
 538   this assumes list will not change
 539 */
 540 _PUBLIC_ const char **str_list_copy_const(TALLOC_CTX *mem_ctx,
 541                                           const char **list);
 542
 543 /**
 544  * Needed for making an "unconst" list "const"
 545  */
 546 _PUBLIC_ const char **const_str_list(char **list);
 547
 548
 549 /* The following definitions come from lib/util/util_file.c  */
 550
 551
 552 /**
 553 read a line from a file with possible \ continuation chars.
 554 Blanks at the start or end of a line are stripped.
 555 The string will be allocated if s2 is NULL
 556 **/
 557 _PUBLIC_ char *fgets_slash(char *s2,int maxlen,XFILE *f);
 558
 559 /**
 560  * Read one line (data until next newline or eof) and allocate it
 561  */
 562 _PUBLIC_ char *afdgets(int fd, TALLOC_CTX *mem_ctx, size_t hint);
 563
 564 /**
 565 load a file into memory from a fd.
 566 **/
 567 _PUBLIC_ char *fd_load(int fd, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
 568
 569
 570 char **file_lines_parse(char *p, size_t size, int *numlines, TALLOC_CTX *mem_ctx);
 571
 572 /**
 573 load a file into memory
 574 **/
 575 _PUBLIC_ char *file_load(const char *fname, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
 576
 577 /**
 578 mmap (if possible) or read a file
 579 **/
 580 _PUBLIC_ void *map_file(const char *fname, size_t size);
 581
 582 /**
 583 load a file into memory and return an array of pointers to lines in the file
 584 must be freed with talloc_free().
 585 **/
 586 _PUBLIC_ char **file_lines_load(const char *fname, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
 587
 588 /**
 589 load a fd into memory and return an array of pointers to lines in the file
 590 must be freed with talloc_free(). If convert is true calls unix_to_dos on
 591 the list.
 592 **/
 593 _PUBLIC_ char **fd_lines_load(int fd, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
 594
 595 /**
 596 take a list of lines and modify them to produce a list where \ continues
 597 a line
 598 **/
 599 _PUBLIC_ void file_lines_slashcont(char **lines);
 600
 601 /**
 602   save a lump of data into a file. Mostly used for debugging
 603 */
 604 _PUBLIC_ bool file_save(const char *fname, const void *packet, size_t length);
 605 _PUBLIC_ int vfdprintf(int fd, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
 606 _PUBLIC_ int fdprintf(int fd, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
 607 _PUBLIC_ bool large_file_support(const char *path);
 608
 609 /*
 610   compare two files, return true if the two files have the same content
 611  */
 612 bool file_compare(const char *path1, const char *path2);
 613
 614 /* The following definitions come from lib/util/util.c  */
 615
 616
 617 /**
 618  Find a suitable temporary directory. The result should be copied immediately
 619  as it may be overwritten by a subsequent call.
 620 **/
 621 _PUBLIC_ const char *tmpdir(void);
 622
 623 /**
 624  Check if a file exists - call vfs_file_exist for samba files.
 625 **/
 626 _PUBLIC_ bool file_exist(const char *fname);
 627
 628 /**
 629  Check a files mod time.
 630 **/
 631 _PUBLIC_ time_t file_modtime(const char *fname);
 632
 633 /**
 634  Check if a directory exists.
 635 **/
 636 _PUBLIC_ bool directory_exist(const char *dname);
 637
 638 /**
 639  * Try to create the specified directory if it didn't exist.
 640  *
 641  * @retval true if the directory already existed and has the right permissions
 642  * or was successfully created.
 643  */
 644 _PUBLIC_ bool directory_create_or_exist(const char *dname, uid_t uid,
 645                                mode_t dir_perms);
 646
 647 /**
 648  Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
 649  else
 650   if SYSV use O_NDELAY
 651   if BSD use FNDELAY
 652 **/
 653 _PUBLIC_ int set_blocking(int fd, bool set);
 654
 655 /**
 656  Sleep for a specified number of milliseconds.
 657 **/
 658 _PUBLIC_ void msleep(unsigned int t);
 659
 660 /**
 661  Get my own name, return in talloc'ed storage.
 662 **/
 663 _PUBLIC_ char* get_myname(TALLOC_CTX *mem_ctx);
 664
 665 /**
 666  Return true if a string could be a pure IP address.
 667 **/
 668 _PUBLIC_ bool is_ipaddress(const char *str);
 669
 670 /**
 671  Interpret an internet address or name into an IP address in 4 byte form.
 672 **/
 673 _PUBLIC_ uint32_t interpret_addr(const char *str);
 674
 675 /**
 676  A convenient addition to interpret_addr().
 677 **/
 678 _PUBLIC_ struct in_addr interpret_addr2(const char *str);
 679
 680 /**
 681  Check if an IP is the 0.0.0.0.
 682 **/
 683 _PUBLIC_ bool is_zero_ip_v4(struct in_addr ip);
 684
 685 /**
 686  Are two IPs on the same subnet?
 687 **/
 688 _PUBLIC_ bool same_net_v4(struct in_addr ip1,struct in_addr ip2,struct in_addr mask);
 689
 690 _PUBLIC_ bool is_ipaddress_v4(const char *str);
 691
 692 /**
 693  Check if a process exists. Does this work on all unixes?
 694 **/
 695 _PUBLIC_ bool process_exists_by_pid(pid_t pid);
 696
 697 /**
 698  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
 699  is dealt with in posix.c
 700 **/
 701 _PUBLIC_ bool fcntl_lock(int fd, int op, off_t offset, off_t count, int type);
 702
 703 /**
 704  * Write dump of binary data to the log file.
 705  *
 706  * The data is only written if the log level is at least level.
 707  */
 708 _PUBLIC_ void dump_data(int level, const uint8_t *buf,int len);
 709
 710 /**
 711  * Write dump of binary data to the log file.
 712  *
 713  * The data is only written if the log level is at least level.
 714  * 16 zero bytes in a row are omitted
 715  */
 716 _PUBLIC_ void dump_data_skip_zeros(int level, const uint8_t *buf, int len);
 717
 718 /**
 719  malloc that aborts with smb_panic on fail or zero size.
 720 **/
 721 _PUBLIC_ void *smb_xmalloc(size_t size);
 722
 723 /**
 724  Memdup with smb_panic on fail.
 725 **/
 726 _PUBLIC_ void *smb_xmemdup(const void *p, size_t size);
 727
 728 /**
 729  strdup that aborts on malloc fail.
 730 **/
 731 _PUBLIC_ char *smb_xstrdup(const char *s);
 732
 733 char *smb_xstrndup(const char *s, size_t n);
 734
 735 /**
 736  Like strdup but for memory.
 737 **/
 738 _PUBLIC_ void *memdup(const void *p, size_t size);
 739
 740 /**
 741  * Write a password to the log file.
 742  *
 743  * @note Only actually does something if DEBUG_PASSWORD was defined during
 744  * compile-time.
 745  */
 746 _PUBLIC_ void dump_data_pw(const char *msg, const uint8_t * data, size_t len);
 747
 748 /**
 749  * see if a range of memory is all zero. A NULL pointer is considered
 750  * to be all zero
 751  */
 752 _PUBLIC_ bool all_zero(const uint8_t *ptr, size_t size);
 753
 754 /**
 755   realloc an array, checking for integer overflow in the array size
 756 */
 757 _PUBLIC_ void *realloc_array(void *ptr, size_t el_size, unsigned count, bool free_on_fail);
 758
 759 void *malloc_array(size_t el_size, unsigned int count);
 760
 761 /* The following definitions come from lib/util/fsusage.c  */
 762
 763
 764 /**
 765  * Retrieve amount of free disk space.
 766  * this does all of the system specific guff to get the free disk space.
 767  * It is derived from code in the GNU fileutils package, but has been
 768  * considerably mangled for use here
 769  *
 770  * results are returned in *dfree and *dsize, in 512 byte units
 771 */
 772 _PUBLIC_ int sys_fsusage(const char *path, uint64_t *dfree, uint64_t *dsize);
 773
 774 /* The following definitions come from lib/util/ms_fnmatch.c  */
 775
 776
 777 /**
 778  * @file
 779  * @brief MS-style Filename matching
 780  */
 781
 782 #if _SAMBA_BUILD_ == 4
 783 /* protocol types. It assumes that higher protocols include lower protocols
 784    as subsets. FIXME: Move to one of the smb-specific headers */
 785 enum protocol_types {
 786         PROTOCOL_NONE,
 787         PROTOCOL_CORE,
 788         PROTOCOL_COREPLUS,
 789         PROTOCOL_LANMAN1,
 790         PROTOCOL_LANMAN2,
 791         PROTOCOL_NT1,
 792         PROTOCOL_SMB2
 793 };
 794
 795 int ms_fnmatch(const char *pattern, const char *string, enum protocol_types protocol);
 796
 797 /** a generic fnmatch function - uses for non-CIFS pattern matching */
 798 int gen_fnmatch(const char *pattern, const char *string);
 799 #endif
 800
 801 /* The following definitions come from lib/util/mutex.c  */
 802
 803
 804 /**
 805   register a set of mutex/rwlock handlers.
 806   Should only be called once in the execution of smbd.
 807 */
 808 _PUBLIC_ bool register_mutex_handlers(const char *name, struct mutex_ops *ops);
 809
 810 /* The following definitions come from lib/util/idtree.c  */
 811
 812
 813 /**
 814   initialise a idr tree. The context return value must be passed to
 815   all subsequent idr calls. To destroy the idr tree use talloc_free()
 816   on this context
 817  */
 818 _PUBLIC_ struct idr_context *idr_init(TALLOC_CTX *mem_ctx);
 819
 820 /**
 821   allocate the next available id, and assign 'ptr' into its slot.
 822   you can retrieve later this pointer using idr_find()
 823 */
 824 _PUBLIC_ int idr_get_new(struct idr_context *idp, void *ptr, int limit);
 825
 826 /**
 827    allocate a new id, giving the first available value greater than or
 828    equal to the given starting id
 829 */
 830 _PUBLIC_ int idr_get_new_above(struct idr_context *idp, void *ptr, int starting_id, int limit);
 831
 832 /**
 833   allocate a new id randomly in the given range
 834 */
 835 _PUBLIC_ int idr_get_new_random(struct idr_context *idp, void *ptr, int limit);
 836
 837 /**
 838   find a pointer value previously set with idr_get_new given an id
 839 */
 840 _PUBLIC_ void *idr_find(struct idr_context *idp, int id);
 841
 842 /**
 843   remove an id from the idr tree
 844 */
 845 _PUBLIC_ int idr_remove(struct idr_context *idp, int id);
 846
 847 /* The following definitions come from lib/util/become_daemon.c  */
 848
 849 /**
 850  Close the low 3 fd's and open dev/null in their place
 851 **/
 852 _PUBLIC_ void close_low_fds(bool stderr_too);
 853
 854 /**
 855  Become a daemon, discarding the controlling terminal.
 856 **/
 857 _PUBLIC_ void become_daemon(bool do_fork, bool no_process_group);
 858
 859 /**
 860  * Load a ini-style file.
 861  */
 862 bool pm_process( const char *fileName,
 863                  bool (*sfunc)(const char *, void *),
 864                  bool (*pfunc)(const char *, const char *, void *),
 865                                  void *userdata);
 866
 867 bool unmap_file(void *start, size_t size);
 868
 869 void print_asc(int level, const uint8_t *buf,int len);
 870
 871 /**
 872  * Add an id to an array of ids.
 873  *
 874  * num should be a pointer to an integer that holds the current
 875  * number of elements in ids. It will be updated by this function.
 876  */
 877
 878 bool add_uid_to_array_unique(TALLOC_CTX *mem_ctx, uid_t uid,
 879                              uid_t **uids, size_t *num_uids);
 880 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
 881                              gid_t **gids, size_t *num_gids);
 882
 883 /*
 884   run a command as a child process, with a timeout.
 885
 886   any stdout/stderr from the child will appear in the Samba logs with
 887   the specified log levels
 888
 889   If callback is set then the callback is called on completion
 890   with the return code from the command
 891  */
 892 struct tevent_context;
 893 struct composite_context *samba_runcmd(struct tevent_context *ev,
 894                                        TALLOC_CTX *mem_ctx,
 895                                        struct timeval timeout,
 896                                        int stdout_log_level,
 897                                        int stderr_log_level,
 898                                        const char **argv0, ...);
 899
 900
 901 #endif /* _SAMBA_UTIL_H_ */