2 Unix SMB/CIFS implementation.
3 Utility functions for Samba
4 Copyright (C) Andrew Tridgell 1992-1999
5 Copyright (C) Jelmer Vernooij 2005
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.
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.
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/>.
21 #ifndef _SAMBA_UTIL_H_
22 #define _SAMBA_UTIL_H_
24 #ifndef SAMBA_UTIL_CORE_ONLY
25 #include "lib/util/charset/charset.h"
27 #include "charset_compat.h"
30 #include "lib/util/attr.h"
40 * @brief Helpful macros
45 extern const char *panic_action;
47 #include "lib/util/time.h"
48 #include "lib/util/data_blob.h"
49 #include "lib/util/xfile.h"
50 #include "lib/util/byteorder.h"
51 #include "lib/util/talloc_stack.h"
54 #define ABS(a) ((a)>0?(a):(-(a)))
57 #include "lib/util/memory.h"
59 #include "../libcli/util/ntstatus.h"
60 #include "lib/util/string_wrappers.h"
64 #include "lib/util/util.h"
67 * Write backtrace to debug log
69 _PUBLIC_ void call_backtrace(void);
71 _PUBLIC_ void dump_core_setup(const char *progname, const char *logfile);
74 register a fault handler.
75 Should only be called once in the execution of smbd.
77 _PUBLIC_ bool register_fault_handler(const char *name, void (*fault_handler)(int sig));
79 #include "lib/util/signal.h" /* Avoid /usr/include/signal.h */
83 _PUBLIC_ int sys_getnameinfo(const struct sockaddr *psa,
91 /* The following definitions come from lib/util/genrand.c */
93 #include "lib/util/genrand.h"
96 generate a single random uint32_t
98 _PUBLIC_ uint32_t generate_random(void);
101 very basic password quality checker
103 _PUBLIC_ bool check_password_quality(const char *s);
106 * Generate a random text password.
108 _PUBLIC_ char *generate_random_password(TALLOC_CTX *mem_ctx, size_t min, size_t max);
111 Use the random number generator to generate a random string.
113 _PUBLIC_ char *generate_random_str_list(TALLOC_CTX *mem_ctx, size_t len, const char *list);
116 * Generate a random text string consisting of the specified length.
117 * The returned string will be allocated.
119 * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
121 _PUBLIC_ char *generate_random_str(TALLOC_CTX *mem_ctx, size_t len);
124 * Generate an array of unique text strings all of the same length.
125 * The returned strings will be allocated.
126 * Returns NULL if the number of unique combinations cannot be created.
128 * Characters used are: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_-#.,
130 _PUBLIC_ char** generate_unique_strs(TALLOC_CTX *mem_ctx, size_t len,
133 /* The following definitions come from lib/util/dprintf.c */
135 _PUBLIC_ int d_fprintf(FILE *f, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
136 _PUBLIC_ int d_printf(const char *format, ...) PRINTF_ATTRIBUTE(1,2);
137 _PUBLIC_ void display_set_stderr(void);
139 /* The following definitions come from lib/util/util_str.c */
141 bool next_token_talloc(TALLOC_CTX *ctx,
147 * Get the next token from a string, return false if none found. Handles
148 * double-quotes. This version does not trim leading separator characters
149 * before looking for a token.
151 bool next_token_no_ltrim_talloc(TALLOC_CTX *ctx,
158 Trim the specified elements off the front and back of a string.
160 _PUBLIC_ bool trim_string(char *s, const char *front, const char *back);
163 Find the number of 'c' chars in a string
165 _PUBLIC_ _PURE_ size_t count_chars(const char *s, char c);
168 Routine to get hex characters and turn them into a 16 byte array.
169 the array can be variable length, and any non-hex-numeric
170 characters are skipped. "0xnn" or "0Xnn" is specially catered
173 valid examples: "0A5D15"; "0x15, 0x49, 0xa2"; "59\ta9\te3\n"
177 _PUBLIC_ size_t strhex_to_str(char *p, size_t p_len, const char *strhex, size_t strhex_len);
180 * Parse a hex string and return a data blob.
182 _PUBLIC_ _PURE_ DATA_BLOB strhex_to_data_blob(TALLOC_CTX *mem_ctx, const char *strhex) ;
185 * Print a buf in hex. Assumes dst is at least (srclen*2)+1 large.
187 _PUBLIC_ void hex_encode_buf(char *dst, const uint8_t *src, size_t srclen);
190 * talloc version of hex_encode_buf()
192 _PUBLIC_ char *hex_encode_talloc(TALLOC_CTX *mem_ctx, const unsigned char *buff_in, size_t len);
194 #include "substitute.h"
197 Unescape a URL encoded string, in place.
199 _PUBLIC_ void rfc1738_unescape(char *buf);
204 * Returns a static buffer that contains the RFC
205 * 1738 compliant, escaped version of the given url. (escapes unsafe and % characters)
207 _PUBLIC_ char *rfc1738_escape(TALLOC_CTX *mem_ctx, const char *url);
210 * rfc1738_escape_unescaped
212 * Returns a static buffer that contains
213 * the RFC 1738 compliant, escaped version of the given url (escapes unsafe chars only)
215 _PUBLIC_ char *rfc1738_escape_unescaped(TALLOC_CTX *mem_ctx, const char *url);
218 * rfc1738_escape_part
219 * Returns a static buffer that contains the RFC
220 * 1738 compliant, escaped version of the given url segment. (escapes
221 * unsafe, reserved and % chars) It would mangle the :// in http://,
222 * and mangle paths (because of /).
224 _PUBLIC_ char *rfc1738_escape_part(TALLOC_CTX *mem_ctx, const char *url);
227 * Add a string to an array of strings.
229 * num should be a pointer to an integer that holds the current
230 * number of elements in strings. It will be updated by this function.
232 _PUBLIC_ bool add_string_to_array(TALLOC_CTX *mem_ctx,
233 const char *str, const char ***strings, size_t *num);
236 varient of strcmp() that handles NULL ptrs
238 _PUBLIC_ int strcmp_safe(const char *s1, const char *s2);
241 return the number of bytes occupied by a buffer in ASCII format
242 the result includes the null termination
245 _PUBLIC_ size_t ascii_len_n(const char *src, size_t n);
248 Set a boolean variable from the text value stored in the passed string.
249 Returns true in success, false if the passed string does not correctly
252 _PUBLIC_ bool set_boolean(const char *boolean_string, bool *boolean);
255 * Parse a string containing a boolean value.
257 * val will be set to the read value.
259 * @retval true if a boolean value was parsed, false otherwise.
261 _PUBLIC_ bool conv_str_bool(const char * str, bool * val);
264 * Convert a size specification like 16K into an integral number of bytes.
266 _PUBLIC_ bool conv_str_size_error(const char * str, uint64_t * val);
269 * Parse a uint64_t value from a string
271 * val will be set to the value read.
273 * @retval true if parsing was successful, false otherwise
275 _PUBLIC_ bool conv_str_u64(const char * str, uint64_t * val);
278 return the number of bytes occupied by a buffer in CH_UTF16 format
279 the result includes the null termination
281 _PUBLIC_ size_t utf16_len(const void *buf);
284 return the number of bytes occupied by a buffer in CH_UTF16 format
285 the result includes the null termination
288 _PUBLIC_ size_t utf16_len_n(const void *src, size_t n);
289 _PUBLIC_ size_t ucs2_align(const void *base_ptr, const void *p, int flags);
292 Do a case-insensitive, whitespace-ignoring string compare.
294 _PUBLIC_ int strwicmp(const char *psz1, const char *psz2);
299 _PUBLIC_ void string_replace(char *s, char oldc, char newc);
302 Base64 decode a string, place into a data blob. Caller to data_blob_free() the result.
304 _PUBLIC_ DATA_BLOB base64_decode_data_blob_talloc(TALLOC_CTX *mem_ctx, const char *s);
307 Base64 decode a string, place into a data blob on NULL context.
308 Caller to data_blob_free() the result.
310 _PUBLIC_ DATA_BLOB base64_decode_data_blob(const char *s);
314 Base64 decode a string, inplace
316 _PUBLIC_ void base64_decode_inplace(char *s);
318 Base64 encode a binary data blob into a string
320 _PUBLIC_ char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data);
325 * @note The comparison is case-insensitive.
327 _PUBLIC_ bool strequal(const char *s1, const char *s2);
329 /* The following definitions come from lib/util/util_strlist.c */
331 /* separators for lists */
333 #define LIST_SEP " \t,\n\r"
337 build an empty (only NULL terminated) list of strings (for expansion with str_list_add() etc)
339 _PUBLIC_ char **str_list_make_empty(TALLOC_CTX *mem_ctx);
342 place the only element 'entry' into a new, NULL terminated string list
344 _PUBLIC_ char **str_list_make_single(TALLOC_CTX *mem_ctx,
348 build a null terminated list of strings from a input string and a
349 separator list. The separator list must contain characters less than
350 or equal to 0x2f for this to work correctly on multi-byte strings
352 _PUBLIC_ char **str_list_make(TALLOC_CTX *mem_ctx, const char *string,
356 * build a null terminated list of strings from an argv-like input string
357 * Entries are separated by spaces and can be enclosed by quotes.
358 * Does NOT support escaping
360 _PUBLIC_ char **str_list_make_shell(TALLOC_CTX *mem_ctx, const char *string, const char *sep);
363 * join a list back to one string
365 _PUBLIC_ char *str_list_join(TALLOC_CTX *mem_ctx, const char **list, char separator);
367 /** join a list back to one (shell-like) string; entries
368 * separated by spaces, using quotes where necessary */
369 _PUBLIC_ char *str_list_join_shell(TALLOC_CTX *mem_ctx, const char **list, char sep);
372 return the number of elements in a string list
374 _PUBLIC_ size_t str_list_length(const char * const *list);
379 _PUBLIC_ char **str_list_copy(TALLOC_CTX *mem_ctx, const char **list);
382 Return true if all the elements of the list match exactly.
384 _PUBLIC_ bool str_list_equal(const char * const *list1, const char * const *list2);
387 add an entry to a string list
389 _PUBLIC_ const char **str_list_add(const char **list, const char *s);
392 remove an entry from a string list
394 _PUBLIC_ void str_list_remove(const char **list, const char *s);
397 return true if a string is in a list
399 _PUBLIC_ bool str_list_check(const char **list, const char *s);
402 return true if a string is in a list, case insensitively
404 _PUBLIC_ bool str_list_check_ci(const char **list, const char *s);
406 append one list to another - expanding list1
408 _PUBLIC_ const char **str_list_append(const char **list1,
409 const char * const *list2);
412 remove duplicate elements from a list
414 _PUBLIC_ const char **str_list_unique(const char **list);
417 very useful when debugging complex list related code
419 _PUBLIC_ void str_list_show(const char **list);
423 append one list to another - expanding list1
424 this assumes the elements of list2 are const pointers, so we can re-use them
426 _PUBLIC_ const char **str_list_append_const(const char **list1,
430 add an entry to a string list
431 this assumes s will not change
433 _PUBLIC_ const char **str_list_add_const(const char **list, const char *s);
437 this assumes list will not change
439 _PUBLIC_ const char **str_list_copy_const(TALLOC_CTX *mem_ctx,
443 * Needed for making an "unconst" list "const"
445 _PUBLIC_ const char **const_str_list(char **list);
448 * str_list_make, v3 version. The v4 version does not
449 * look at quoted strings with embedded blanks, so
450 * do NOT merge this function please!
452 char **str_list_make_v3(TALLOC_CTX *mem_ctx, const char *string,
456 const char **str_list_make_v3_const(TALLOC_CTX *mem_ctx,
460 /* The following definitions come from lib/util/util_file.c */
464 read a line from a file with possible \ continuation chars.
465 Blanks at the start or end of a line are stripped.
466 The string will be allocated if s2 is NULL
468 _PUBLIC_ char *fgets_slash(char *s2,int maxlen,XFILE *f);
471 * Read one line (data until next newline or eof) and allocate it
473 _PUBLIC_ char *afdgets(int fd, TALLOC_CTX *mem_ctx, size_t hint);
476 load a file into memory from a fd.
478 _PUBLIC_ char *fd_load(int fd, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
481 char **file_lines_parse(char *p, size_t size, int *numlines, TALLOC_CTX *mem_ctx);
484 load a file into memory
486 _PUBLIC_ char *file_load(const char *fname, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx);
489 load a file into memory and return an array of pointers to lines in the file
490 must be freed with talloc_free().
492 _PUBLIC_ char **file_lines_load(const char *fname, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
495 load a fd into memory and return an array of pointers to lines in the file
496 must be freed with talloc_free(). If convert is true calls unix_to_dos on
499 _PUBLIC_ char **fd_lines_load(int fd, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx);
501 _PUBLIC_ bool file_save_mode(const char *fname, const void *packet,
502 size_t length, mode_t mode);
504 save a lump of data into a file. Mostly used for debugging
506 _PUBLIC_ bool file_save(const char *fname, const void *packet, size_t length);
507 _PUBLIC_ int vfdprintf(int fd, const char *format, va_list ap) PRINTF_ATTRIBUTE(2,0);
508 _PUBLIC_ int fdprintf(int fd, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
511 compare two files, return true if the two files have the same content
513 bool file_compare(const char *path1, const char *path2);
515 /* The following definitions come from lib/util/util.c */
519 Find a suitable temporary directory. The result should be copied immediately
520 as it may be overwritten by a subsequent call.
522 _PUBLIC_ const char *tmpdir(void);
525 * Creates and immediately unlinks a file. Returns open file descriptor.
527 _PUBLIC_ int create_unlink_tmp(const char *dir);
530 Check if a file exists - call vfs_file_exist for samba files.
532 _PUBLIC_ bool file_exist(const char *fname);
535 Check a files mod time.
537 _PUBLIC_ time_t file_modtime(const char *fname);
540 Check if a directory exists.
542 _PUBLIC_ bool directory_exist(const char *dname);
545 Check file permissions.
547 _PUBLIC_ bool file_check_permissions(const char *fname,
553 * Try to create the specified directory if it didn't exist.
555 * @retval true if the directory already existed and has the right permissions
556 * or was successfully created.
558 _PUBLIC_ bool directory_create_or_exist(const char *dname, mode_t dir_perms);
560 _PUBLIC_ bool directory_create_or_exist_strict(const char *dname,
564 #include "blocking.h"
567 Sleep for a specified number of milliseconds.
569 _PUBLIC_ void smb_msleep(unsigned int t);
572 Get my own name, return in talloc'ed storage.
574 _PUBLIC_ char* get_myname(TALLOC_CTX *mem_ctx);
577 Check if a process exists. Does this work on all unixes?
579 _PUBLIC_ bool process_exists_by_pid(pid_t pid);
582 Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
583 is dealt with in posix.c
585 _PUBLIC_ bool fcntl_lock(int fd, int op, off_t offset, off_t count, int type);
588 * Write dump of binary data to the log file.
590 * The data is only written if the log level is at least level.
591 * 16 zero bytes in a row are omitted
593 _PUBLIC_ void dump_data_skip_zeros(int level, const uint8_t *buf, int len);
596 malloc that aborts with smb_panic on fail or zero size.
598 _PUBLIC_ void *smb_xmalloc(size_t size);
601 Memdup with smb_panic on fail.
603 _PUBLIC_ void *smb_xmemdup(const void *p, size_t size);
606 strdup that aborts on malloc fail.
608 _PUBLIC_ char *smb_xstrdup(const char *s);
610 char *smb_xstrndup(const char *s, size_t n);
613 Like strdup but for memory.
615 _PUBLIC_ void *smb_memdup(const void *p, size_t size);
618 * Write a password to the log file.
620 * @note Only actually does something if DEBUG_PASSWORD was defined during
623 _PUBLIC_ void dump_data_pw(const char *msg, const uint8_t * data, size_t len);
626 * see if a range of memory is all zero. A NULL pointer is considered
629 _PUBLIC_ bool all_zero(const uint8_t *ptr, size_t size);
632 realloc an array, checking for integer overflow in the array size
634 _PUBLIC_ void *realloc_array(void *ptr, size_t el_size, unsigned count, bool free_on_fail);
636 void *malloc_array(size_t el_size, unsigned int count);
638 void *memalign_array(size_t el_size, size_t align, unsigned int count);
640 void *calloc_array(size_t size, size_t nmemb);
642 /* The following definitions come from lib/util/fsusage.c */
646 * Retrieve amount of free disk space.
647 * this does all of the system specific guff to get the free disk space.
648 * It is derived from code in the GNU fileutils package, but has been
649 * considerably mangled for use here
651 * results are returned in *dfree and *dsize, in 512 byte units
653 _PUBLIC_ int sys_fsusage(const char *path, uint64_t *dfree, uint64_t *dsize);
655 /* The following definitions come from lib/util/ms_fnmatch.c */
660 * @brief MS-style Filename matching
663 int ms_fnmatch_protocol(const char *pattern, const char *string, int protocol);
665 /** a generic fnmatch function - uses for non-CIFS pattern matching */
666 int gen_fnmatch(const char *pattern, const char *string);
669 #include "idtree_random.h"
672 Close the low 3 fd's and open dev/null in their place
674 _PUBLIC_ void close_low_fds(bool stdin_too, bool stdout_too, bool stderr_too);
677 Become a daemon, discarding the controlling terminal.
679 _PUBLIC_ void become_daemon(bool do_fork, bool no_process_group, bool log_stdout);
682 Exit daemon and print error message to the log at level 0
683 Optionally report failure to systemd if systemd integration is enabled
685 _PUBLIC_ void exit_daemon(const char *msg, int error);
688 Report that the daemon is ready to serve connections to the log at level 0
689 Optionally report status to systemd if systemd integration is enabled
691 _PUBLIC_ void daemon_ready(const char *daemon);
694 * Report the daemon status. For example if it is not ready to serve connections
695 * and is waiting for some event to happen.
697 _PUBLIC_ void daemon_status(const char *name, const char *msg);
700 * @brief Get a password from the console.
702 * You should make sure that the buffer is an empty string!
704 * You can also use this function to ask for a username. Then you can fill the
705 * buffer with the username and it is shows to the users. If the users just
706 * presses enter the buffer will be untouched.
709 * char username[128];
711 * snprintf(username, sizeof(username), "john");
713 * smb_getpass("Username:", username, sizeof(username), 1, 0);
716 * The prompt will look like this:
720 * If you press enter then john is used as the username, or you can type it in
723 * @param[in] prompt The prompt to show to ask for the password.
725 * @param[out] buf The buffer the password should be stored. It NEEDS to be
726 * empty or filled out.
728 * @param[in] len The length of the buffer.
730 * @param[in] echo Should we echo what you type.
732 * @param[in] verify Should we ask for the password twice.
734 * @return 0 on success, -1 on error.
736 _PUBLIC_ int samba_getpass(const char *prompt, char *buf, size_t len,
737 bool echo, bool verify);
740 * Load a ini-style file.
742 bool pm_process( const char *fileName,
743 bool (*sfunc)(const char *, void *),
744 bool (*pfunc)(const char *, const char *, void *),
747 void print_asc(int level, const uint8_t *buf,int len);
748 void print_asc_cb(const uint8_t *buf, int len,
749 void (*cb)(const char *buf, void *private_data),
753 * Add an id to an array of ids.
755 * num should be a pointer to an integer that holds the current
756 * number of elements in ids. It will be updated by this function.
759 bool add_uid_to_array_unique(TALLOC_CTX *mem_ctx, uid_t uid,
760 uid_t **uids, uint32_t *num_uids);
761 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
762 gid_t **gids, uint32_t *num_gids);
765 * Allocate anonymous shared memory of the given size
767 void *anonymous_shared_allocate(size_t bufsz);
768 void *anonymous_shared_resize(void *ptr, size_t new_size, bool maymove);
769 void anonymous_shared_free(void *ptr);
772 run a command as a child process, with a timeout.
774 any stdout/stderr from the child will appear in the Samba logs with
775 the specified log levels
777 If callback is set then the callback is called on completion
778 with the return code from the command
780 struct tevent_context;
782 struct tevent_req *samba_runcmd_send(TALLOC_CTX *mem_ctx,
783 struct tevent_context *ev,
784 struct timeval endtime,
785 int stdout_log_level,
786 int stderr_log_level,
787 const char * const *argv0, ...);
788 int samba_runcmd_recv(struct tevent_req *req, int *perrno);
791 void samba_start_debugger(void);
795 * @brief Returns an absolute path to a file in the Samba modules directory.
797 * @param name File to find, relative to MODULESDIR.
799 * @retval Pointer to a string containing the full path.
801 char *modules_path(TALLOC_CTX *mem_ctx, const char *name);
804 * @brief Returns an absolute path to a file in the Samba data directory.
806 * @param name File to find, relative to CODEPAGEDIR.
808 * @retval Pointer to a talloc'ed string containing the full path.
810 char *data_path(TALLOC_CTX *mem_ctx, const char *name);
813 * @brief Returns the platform specific shared library extension.
815 * @retval Pointer to a const char * containing the extension.
817 const char *shlib_ext(void);
821 struct server_id_buf { char buf[48]; }; /* probably a bit too large ... */
822 char *server_id_str_buf(struct server_id id, struct server_id_buf *dst);
823 size_t server_id_str_buf_unique(struct server_id id, char *buf, size_t buflen);
825 bool server_id_same_process(const struct server_id *p1,
826 const struct server_id *p2);
827 bool server_id_equal(const struct server_id *p1, const struct server_id *p2);
828 struct server_id server_id_from_string(uint32_t local_vnn,
829 const char *pid_string);
832 * Set the serverid to the special value that represents a disconnected
833 * client for (e.g.) durable handles.
835 void server_id_set_disconnected(struct server_id *id);
838 * check whether a serverid is the special placeholder for
839 * a disconnected client
841 bool server_id_is_disconnected(const struct server_id *id);
843 void server_id_put(uint8_t buf[24], const struct server_id id);
844 void server_id_get(struct server_id *id, const uint8_t buf[24]);
847 * Samba code should use samba_tevent_context_init() instead of
848 * tevent_context_init() in order to get the debug output.
850 struct tevent_context *samba_tevent_context_init(TALLOC_CTX *mem_ctx);
853 * if same samba code needs to use a specific tevent backend
854 * it can use something like this:
856 * samba_tevent_set_debug(ev, "pysmb_tevent");
858 void samba_tevent_set_debug(struct tevent_context *ev, const char *name);
860 #endif /* _SAMBA_UTIL_H_ */