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Asterisk developer's documentation


app.h

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  * See http://www.asterisk.org for more information about
00008  * the Asterisk project. Please do not directly contact
00009  * any of the maintainers of this project for assistance;
00010  * the project provides a web site, mailing lists and IRC
00011  * channels for your use.
00012  *
00013  * This program is free software, distributed under the terms of
00014  * the GNU General Public License Version 2. See the LICENSE file
00015  * at the top of the source tree.
00016  */
00017 
00018 /*! \file
00019  * \brief Application convenience functions, designed to give consistent
00020  *        look and feel to Asterisk apps.
00021  */
00022 
00023 #ifndef _ASTERISK_APP_H
00024 #define _ASTERISK_APP_H
00025 
00026 #include "asterisk/strings.h"
00027 #include "asterisk/threadstorage.h"
00028 
00029 struct ast_flags64;
00030 
00031 #if defined(__cplusplus) || defined(c_plusplus)
00032 extern "C" {
00033 #endif
00034 
00035 AST_THREADSTORAGE_EXTERNAL(ast_str_thread_global_buf);
00036 
00037 /* IVR stuff */
00038 
00039 /*! \brief Callback function for IVR
00040     \return returns 0 on completion, -1 on hangup or digit if interrupted
00041   */
00042 typedef int (*ast_ivr_callback)(struct ast_channel *chan, char *option, void *cbdata);
00043 
00044 typedef enum {
00045    AST_ACTION_UPONE, /*!< adata is unused */
00046    AST_ACTION_EXIT,  /*!< adata is the return value for ast_ivr_menu_run if channel was not hungup */
00047    AST_ACTION_CALLBACK, /*!< adata is an ast_ivr_callback */
00048    AST_ACTION_PLAYBACK, /*!< adata is file to play */
00049    AST_ACTION_BACKGROUND,  /*!< adata is file to play */
00050    AST_ACTION_PLAYLIST, /*!< adata is list of files, separated by ; to play */
00051    AST_ACTION_MENU,  /*!< adata is a pointer to an ast_ivr_menu */
00052    AST_ACTION_REPEAT,   /*!< adata is max # of repeats, cast to a pointer */
00053    AST_ACTION_RESTART,  /*!< adata is like repeat, but resets repeats to 0 */
00054    AST_ACTION_TRANSFER, /*!< adata is a string with exten\verbatim[@context]\endverbatim */
00055    AST_ACTION_WAITOPTION,  /*!< adata is a timeout, or 0 for defaults */
00056    AST_ACTION_NOOP,  /*!< adata is unused */
00057    AST_ACTION_BACKLIST, /*!< adata is list of files separated by ; allows interruption */
00058 } ast_ivr_action;
00059 
00060 /*!
00061     Special "options" are:
00062    \arg "s" - "start here (one time greeting)"
00063    \arg "g" - "greeting/instructions"
00064    \arg "t" - "timeout"
00065    \arg "h" - "hangup"
00066    \arg "i" - "invalid selection"
00067 
00068 */
00069 struct ast_ivr_option {
00070    char *option;
00071    ast_ivr_action action;
00072    void *adata;
00073 };
00074 
00075 struct ast_ivr_menu {
00076    char *title;      /*!< Title of menu */
00077    unsigned int flags;  /*!< Flags */
00078    struct ast_ivr_option *options;  /*!< All options */
00079 };
00080 
00081 #define AST_IVR_FLAG_AUTORESTART (1 << 0)
00082 
00083 #define AST_IVR_DECLARE_MENU(holder, title, flags, foo...) \
00084    static struct ast_ivr_option __options_##holder[] = foo;\
00085    static struct ast_ivr_menu holder = { title, flags, __options_##holder }
00086 
00087 enum ast_timelen {
00088    TIMELEN_HOURS,
00089    TIMELEN_MINUTES,
00090    TIMELEN_SECONDS,
00091    TIMELEN_MILLISECONDS,
00092 };
00093 
00094 /*!   \brief Runs an IVR menu
00095    \return returns 0 on successful completion, -1 on hangup, or -2 on user error in menu */
00096 int ast_ivr_menu_run(struct ast_channel *c, struct ast_ivr_menu *menu, void *cbdata);
00097 
00098 /*! \brief Plays a stream and gets DTMF data from a channel
00099  * \param c Which channel one is interacting with
00100  * \param prompt File to pass to ast_streamfile (the one that you wish to play).
00101  *        It is also valid for this to be multiple files concatenated by "&".
00102  *        For example, "file1&file2&file3".
00103  * \param s The location where the DTMF data will be stored
00104  * \param maxlen Max Length of the data
00105  * \param timeout Timeout length waiting for data(in milliseconds).  Set to 0 for standard timeout(six seconds), or -1 for no time out.
00106  *
00107  *  This function was designed for application programmers for situations where they need
00108  *  to play a message and then get some DTMF data in response to the message.  If a digit
00109  *  is pressed during playback, it will immediately break out of the message and continue
00110  *  execution of your code.
00111  */
00112 int ast_app_getdata(struct ast_channel *c, const char *prompt, char *s, int maxlen, int timeout);
00113 
00114 /*! \brief Full version with audiofd and controlfd.  NOTE: returns '2' on ctrlfd available, not '1' like other full functions */
00115 int ast_app_getdata_full(struct ast_channel *c, const char *prompt, char *s, int maxlen, int timeout, int audiofd, int ctrlfd);
00116 
00117 /*!
00118  * \since 1.8
00119  * \brief Run a macro on a channel, placing a second channel into autoservice.
00120  *
00121  * This is a shorthand method that makes it very easy to run a macro on any given 
00122  * channel. It is perfectly reasonable to supply a NULL autoservice_chan here in case
00123  * there is no channel to place into autoservice. It is very important that the 
00124  * autoservice_chan parameter is not locked prior to calling ast_app_run_macro. A 
00125  * deadlock could result, otherwise.
00126  *
00127  * \param autoservice_chan A channel to place into autoservice while the macro is run
00128  * \param macro_chan The channel to run the macro on
00129  * \param macro_name The name of the macro to run
00130  * \param macro_args The arguments to pass to the macro
00131  * \retval 0 success
00132  * \retval -1 failure
00133  */
00134 int ast_app_run_macro(struct ast_channel *autoservice_chan, struct ast_channel 
00135       *macro_chan, const char * const macro_name, const char * const macro_args);
00136 
00137 /*!
00138  * \brief Set voicemail function callbacks
00139  * \param[in] has_voicemail_func set function pointer
00140  * \param[in] inboxcount2_func set function pointer
00141  * \param[in] sayname_func set function pointer
00142  * \param[in] inboxcount_func set function pointer
00143  * \param[in] messagecount_func set function pointer
00144  * \version 1.6.1 Added inboxcount2_func, sayname_func
00145  */
00146 void ast_install_vm_functions(int (*has_voicemail_func)(const char *mailbox, const char *folder),
00147                int (*inboxcount_func)(const char *mailbox, int *newmsgs, int *oldmsgs),
00148                int (*inboxcount2_func)(const char *mailbox, int *urgentmsgs, int *newmsgs, int *oldmsgs),
00149                int (*messagecount_func)(const char *context, const char *mailbox, const char *folder),
00150                int (*sayname_func)(struct ast_channel *chan, const char *mailbox, const char *context));
00151 
00152 void ast_uninstall_vm_functions(void);
00153 
00154 /*!
00155  * \brief Determine if a given mailbox has any voicemail
00156  * If folder is NULL, defaults to "INBOX".  If folder is "INBOX", includes the
00157  * number of messages in the "Urgent" folder.
00158  * \retval 1 Mailbox has voicemail
00159  * \retval 0 No new voicemail in specified mailbox
00160  * \retval -1 Failure
00161  * \since 1.0
00162  */
00163 int ast_app_has_voicemail(const char *mailbox, const char *folder);
00164 
00165 /*!
00166  * \brief Determine number of new/old messages in a mailbox
00167  * \since 1.0
00168  * \param[in] mailbox Mailbox specification in the format mbox[@context][&mbox2[@context2]][...]
00169  * \param[out] newmsgs Number of messages in the "INBOX" folder.  Includes number of messages in the "Urgent" folder, if any.
00170  * \param[out] oldmsgs Number of messages in the "Old" folder.
00171  * \retval 0 Success
00172  * \retval -1 Failure
00173  */
00174 int ast_app_inboxcount(const char *mailbox, int *newmsgs, int *oldmsgs);
00175 
00176 /*!
00177  * \brief Determine number of urgent/new/old messages in a mailbox
00178  * \param[in] mailbox the mailbox context to use
00179  * \param[out] urgentmsgs the urgent message count
00180  * \param[out] newmsgs the new message count
00181  * \param[out] oldmsgs the old message count
00182  * \return Returns 0 for success, negative upon error
00183  * \since 1.6.1
00184  */
00185 int ast_app_inboxcount2(const char *mailbox, int *urgentmsgs, int *newmsgs, int *oldmsgs);
00186 
00187 /*!
00188  * \brief Given a mailbox and context, play that mailbox owner's name to the channel specified
00189  * \param[in] chan Channel on which to play the name
00190  * \param[in] mailbox Mailbox number from which to retrieve the recording
00191  * \param[in] context Mailbox context from which to locate the mailbox number
00192  * \retval 0 Name played without interruption
00193  * \retval dtmf ASCII value of the DTMF which interrupted playback.
00194  * \retval -1 Unable to locate mailbox or hangup occurred.
00195  * \since 1.6.1
00196  */
00197 int ast_app_sayname(struct ast_channel *chan, const char *mailbox, const char *context);
00198 
00199 /*!
00200  * \brief Check number of messages in a given context, mailbox, and folder
00201  * \since 1.4
00202  * \param[in] context Mailbox context
00203  * \param[in] mailbox Mailbox number
00204  * \param[in] folder Mailbox folder
00205  * \return Number of messages in the given context, mailbox, and folder.  If folder is NULL, folder "INBOX" is assumed.  If folder is "INBOX", includes number of messages in the "Urgent" folder.
00206  */
00207 int ast_app_messagecount(const char *context, const char *mailbox, const char *folder);
00208 
00209 /*! \brief Safely spawn an external program while closing file descriptors
00210    \note This replaces the \b system call in all Asterisk modules
00211 */
00212 int ast_safe_system(const char *s);
00213 
00214 /*!
00215  * \brief Replace the SIGCHLD handler
00216  *
00217  * Normally, Asterisk has a SIGCHLD handler that is cleaning up all zombie
00218  * processes from forking elsewhere in Asterisk.  However, if you want to
00219  * wait*() on the process to retrieve information about it's exit status,
00220  * then this signal handler needs to be temporarily replaced.
00221  *
00222  * Code that executes this function *must* call ast_unreplace_sigchld()
00223  * after it is finished doing the wait*().
00224  */
00225 void ast_replace_sigchld(void);
00226 
00227 /*!
00228  * \brief Restore the SIGCHLD handler
00229  *
00230  * This function is called after a call to ast_replace_sigchld.  It restores
00231  * the SIGCHLD handler that cleans up any zombie processes.
00232  */
00233 void ast_unreplace_sigchld(void);
00234 
00235 /*!
00236   \brief Send DTMF to a channel
00237 
00238   \param chan    The channel that will receive the DTMF frames
00239   \param peer    (optional) Peer channel that will be autoserviced while the
00240                  primary channel is receiving DTMF
00241   \param digits  This is a string of characters representing the DTMF digits
00242                  to be sent to the channel.  Valid characters are
00243                  "0123456789*#abcdABCD".  Note: You can pass arguments 'f' or
00244                  'F', if you want to Flash the channel (if supported by the
00245                  channel), or 'w' to add a 500 millisecond pause to the DTMF
00246                  sequence.
00247   \param between This is the number of milliseconds to wait in between each
00248                  DTMF digit.  If zero milliseconds is specified, then the
00249                  default value of 100 will be used.
00250   \param duration This is the duration that each DTMF digit should have.
00251 */
00252 int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration);
00253 
00254 /*! \brief Stream a filename (or file descriptor) as a generator. */
00255 int ast_linear_stream(struct ast_channel *chan, const char *filename, int fd, int allowoverride);
00256 
00257 /*!
00258  * \brief Stream a file with fast forward, pause, reverse, restart.
00259  * \param chan
00260  * \param file filename
00261  * \param fwd, rev, stop, pause, restart, skipms, offsetms
00262  *
00263  * Before calling this function, set this to be the number
00264  * of ms to start from the beginning of the file.  When the function
00265  * returns, it will be the number of ms from the beginning where the
00266  * playback stopped.  Pass NULL if you don't care.
00267  */
00268 int ast_control_streamfile(struct ast_channel *chan, const char *file, const char *fwd, const char *rev, const char *stop, const char *pause, const char *restart, int skipms, long *offsetms);
00269 
00270 /*! \brief Play a stream and wait for a digit, returning the digit that was pressed */
00271 int ast_play_and_wait(struct ast_channel *chan, const char *fn);
00272 
00273 int ast_play_and_record_full(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime_sec, const char *fmt, int *duration, int silencethreshold, int maxsilence_ms, const char *path, const char *acceptdtmf, const char *canceldtmf);
00274 
00275 /*! \brief Record a file for a max amount of time (in seconds), in a given list of formats separated by '|', outputting the duration of the recording, and with a maximum
00276  \n
00277  permitted silence time in milliseconds of 'maxsilence' under 'silencethreshold' or use '-1' for either or both parameters for defaults.
00278      calls ast_unlock_path() on 'path' if passed */
00279 int ast_play_and_record(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime_sec, const char *fmt, int *duration, int silencethreshold, int maxsilence_ms, const char *path);
00280 
00281 /*! \brief Record a message and prepend the message to the given record file after
00282     playing the optional playfile (or a beep), storing the duration in
00283     'duration' and with a maximum permitted silence time in milliseconds of 'maxsilence' under
00284     'silencethreshold' or use '-1' for either or both parameters for defaults. */
00285 int ast_play_and_prepend(struct ast_channel *chan, char *playfile, char *recordfile, int maxtime_sec, char *fmt, int *duration, int beep, int silencethreshold, int maxsilence_ms);
00286 
00287 enum ast_getdata_result {
00288    AST_GETDATA_FAILED = -1,
00289    AST_GETDATA_COMPLETE = 0,
00290    AST_GETDATA_TIMEOUT = 1,
00291    AST_GETDATA_INTERRUPTED = 2,
00292    /*! indicates a user terminated empty string rather than an empty string resulting 
00293     * from a timeout or other factors */
00294    AST_GETDATA_EMPTY_END_TERMINATED = 3,
00295 };
00296 
00297 enum AST_LOCK_RESULT {
00298    AST_LOCK_SUCCESS = 0,
00299    AST_LOCK_TIMEOUT = -1,
00300    AST_LOCK_PATH_NOT_FOUND = -2,
00301    AST_LOCK_FAILURE = -3,
00302 };
00303 
00304 /*! \brief Type of locking to use in ast_lock_path / ast_unlock_path */
00305 enum AST_LOCK_TYPE {
00306    AST_LOCK_TYPE_LOCKFILE = 0,
00307    AST_LOCK_TYPE_FLOCK = 1,
00308 };
00309 
00310 /*!
00311  * \brief Set the type of locks used by ast_lock_path()
00312  * \param type the locking type to use
00313  */
00314 void ast_set_lock_type(enum AST_LOCK_TYPE type);
00315 
00316 /*!
00317  * \brief Lock a filesystem path.
00318  * \param path the path to be locked
00319  * \return one of \ref AST_LOCK_RESULT values
00320  */
00321 enum AST_LOCK_RESULT ast_lock_path(const char *path);
00322 
00323 /*! \brief Unlock a path */
00324 int ast_unlock_path(const char *path);
00325 
00326 /*! \brief Read a file into asterisk*/
00327 char *ast_read_textfile(const char *file);
00328 
00329 struct ast_group_info;
00330 
00331 /*! \brief Split a group string into group and category, returning a default category if none is provided. */
00332 int ast_app_group_split_group(const char *data, char *group, int group_max, char *category, int category_max);
00333 
00334 /*! \brief Set the group for a channel, splitting the provided data into group and category, if specified. */
00335 int ast_app_group_set_channel(struct ast_channel *chan, const char *data);
00336 
00337 /*! \brief Get the current channel count of the specified group and category. */
00338 int ast_app_group_get_count(const char *group, const char *category);
00339 
00340 /*! \brief Get the current channel count of all groups that match the specified pattern and category. */
00341 int ast_app_group_match_get_count(const char *groupmatch, const char *category);
00342 
00343 /*! \brief Discard all group counting for a channel */
00344 int ast_app_group_discard(struct ast_channel *chan);
00345 
00346 /*! \brief Update all group counting for a channel to a new one */
00347 int ast_app_group_update(struct ast_channel *oldchan, struct ast_channel *newchan);
00348 
00349 /*! \brief Write Lock the group count list */
00350 int ast_app_group_list_wrlock(void);
00351 
00352 /*! \brief Read Lock the group count list */
00353 int ast_app_group_list_rdlock(void);
00354 
00355 /*! \brief Get the head of the group count list */
00356 struct ast_group_info *ast_app_group_list_head(void);
00357 
00358 /*! \brief Unlock the group count list */
00359 int ast_app_group_list_unlock(void);
00360 
00361 /*!
00362   \brief Define an application argument
00363   \param name The name of the argument
00364 */
00365 #define AST_APP_ARG(name) char *name
00366 
00367 /*!
00368   \brief Declare a structure to hold an application's arguments.
00369   \param name The name of the structure
00370   \param arglist The list of arguments, defined using AST_APP_ARG
00371 
00372   This macro declares a structure intended to be used in a call
00373   to ast_app_separate_args(). The structure includes all the
00374   arguments specified, plus an argv array that overlays them and an
00375   argc argument counter. The arguments must be declared using AST_APP_ARG,
00376   and they will all be character pointers (strings).
00377 
00378   \note The structure is <b>not</b> initialized, as the call to
00379   ast_app_separate_args() will perform that function before parsing
00380   the arguments.
00381  */
00382 #define AST_DECLARE_APP_ARGS(name, arglist) AST_DEFINE_APP_ARGS_TYPE(, arglist) name
00383 
00384 /*!
00385   \brief Define a structure type to hold an application's arguments.
00386   \param type The name of the structure type
00387   \param arglist The list of arguments, defined using AST_APP_ARG
00388 
00389   This macro defines a structure type intended to be used in a call
00390   to ast_app_separate_args(). The structure includes all the
00391   arguments specified, plus an argv array that overlays them and an
00392   argc argument counter. The arguments must be declared using AST_APP_ARG,
00393   and they will all be character pointers (strings).
00394 
00395   \note This defines a structure type, but does not declare an instance
00396   of the structure. That must be done separately.
00397  */
00398 #define AST_DEFINE_APP_ARGS_TYPE(type, arglist) \
00399    struct type { \
00400       unsigned int argc; \
00401       char *argv[0]; \
00402       arglist \
00403    }
00404 
00405 /*!
00406   \brief Performs the 'standard' argument separation process for an application.
00407   \param args An argument structure defined using AST_DECLARE_APP_ARGS
00408   \param parse A modifiable buffer containing the input to be parsed
00409 
00410   This function will separate the input string using the standard argument
00411   separator character ',' and fill in the provided structure, including
00412   the argc argument counter field.
00413  */
00414 #define AST_STANDARD_APP_ARGS(args, parse) \
00415    args.argc = __ast_app_separate_args(parse, ',', 1, args.argv, ((sizeof(args) - offsetof(typeof(args), argv)) / sizeof(args.argv[0])))
00416 #define AST_STANDARD_RAW_ARGS(args, parse) \
00417    args.argc = __ast_app_separate_args(parse, ',', 0, args.argv, ((sizeof(args) - offsetof(typeof(args), argv)) / sizeof(args.argv[0])))
00418 
00419 /*!
00420   \brief Performs the 'nonstandard' argument separation process for an application.
00421   \param args An argument structure defined using AST_DECLARE_APP_ARGS
00422   \param parse A modifiable buffer containing the input to be parsed
00423   \param sep A nonstandard separator character
00424 
00425   This function will separate the input string using the nonstandard argument
00426   separator character and fill in the provided structure, including
00427   the argc argument counter field.
00428  */
00429 #define AST_NONSTANDARD_APP_ARGS(args, parse, sep) \
00430    args.argc = __ast_app_separate_args(parse, sep, 1, args.argv, ((sizeof(args) - offsetof(typeof(args), argv)) / sizeof(args.argv[0])))
00431 #define AST_NONSTANDARD_RAW_ARGS(args, parse, sep) \
00432    args.argc = __ast_app_separate_args(parse, sep, 0, args.argv, ((sizeof(args) - offsetof(typeof(args), argv)) / sizeof(args.argv[0])))
00433 
00434 /*!
00435   \brief Separate a string into arguments in an array
00436   \param buf The string to be parsed (this must be a writable copy, as it will be modified)
00437   \param delim The character to be used to delimit arguments
00438   \param remove_chars Remove backslashes and quote characters, while parsing
00439   \param array An array of 'char *' to be filled in with pointers to the found arguments
00440   \param arraylen The number of elements in the array (i.e. the number of arguments you will accept)
00441 
00442   Note: if there are more arguments in the string than the array will hold, the last element of
00443   the array will contain the remaining arguments, not separated.
00444 
00445   The array will be completely zeroed by this function before it populates any entries.
00446 
00447   \return The number of arguments found, or zero if the function arguments are not valid.
00448 */
00449 unsigned int __ast_app_separate_args(char *buf, char delim, int remove_chars, char **array, int arraylen);
00450 #define ast_app_separate_args(a,b,c,d) __ast_app_separate_args(a,b,1,c,d)
00451 
00452 /*!
00453   \brief A structure to hold the description of an application 'option'.
00454 
00455   Application 'options' are single-character flags that can be supplied
00456   to the application to affect its behavior; they can also optionally
00457   accept arguments enclosed in parenthesis.
00458 
00459   These structures are used by the ast_app_parse_options function, uses
00460   this data to fill in a flags structure (to indicate which options were
00461   supplied) and array of argument pointers (for those options that had
00462   arguments supplied).
00463  */
00464 struct ast_app_option {
00465    /*! \brief The flag bit that represents this option. */
00466    uint64_t flag;
00467    /*! \brief The index of the entry in the arguments array
00468      that should be used for this option's argument. */
00469    unsigned int arg_index;
00470 };
00471 
00472 #define BEGIN_OPTIONS {
00473 #define END_OPTIONS }
00474 
00475 /*!
00476   \brief Declares an array of options for an application.
00477   \param holder The name of the array to be created
00478   \param options The actual options to be placed into the array
00479   \sa ast_app_parse_options
00480 
00481   This macro declares a 'static const' array of \c struct \c ast_option
00482   elements to hold the list of available options for an application.
00483   Each option must be declared using either the AST_APP_OPTION()
00484   or AST_APP_OPTION_ARG() macros.
00485 
00486   Example usage:
00487   \code
00488   enum my_app_option_flags {
00489         OPT_JUMP = (1 << 0),
00490         OPT_BLAH = (1 << 1),
00491         OPT_BLORT = (1 << 2),
00492   };
00493 
00494   enum my_app_option_args {
00495         OPT_ARG_BLAH = 0,
00496         OPT_ARG_BLORT,
00497         !! this entry tells how many possible arguments there are,
00498            and must be the last entry in the list
00499         OPT_ARG_ARRAY_SIZE,
00500   };
00501 
00502   AST_APP_OPTIONS(my_app_options, {
00503         AST_APP_OPTION('j', OPT_JUMP),
00504         AST_APP_OPTION_ARG('b', OPT_BLAH, OPT_ARG_BLAH),
00505         AST_APP_OPTION_BLORT('B', OPT_BLORT, OPT_ARG_BLORT),
00506   });
00507 
00508   static int my_app_exec(struct ast_channel *chan, void *data)
00509   {
00510    char *options;
00511    struct ast_flags opts = { 0, };
00512    char *opt_args[OPT_ARG_ARRAY_SIZE];
00513 
00514    ... do any argument parsing here ...
00515 
00516    if (ast_app_parse_options(my_app_options, &opts, opt_args, options)) {
00517       return -1;
00518    }
00519   }
00520   \endcode
00521  */
00522 #define AST_APP_OPTIONS(holder, options...) \
00523    static const struct ast_app_option holder[128] = options
00524 
00525 /*!
00526   \brief Declares an application option that does not accept an argument.
00527   \param option The single character representing the option
00528   \param flagno The flag index to be set if this option is present
00529   \sa AST_APP_OPTIONS, ast_app_parse_options
00530  */
00531 #define AST_APP_OPTION(option, flagno) \
00532    [option] = { .flag = flagno }
00533 
00534 /*!
00535   \brief Declares an application option that accepts an argument.
00536   \param option The single character representing the option
00537   \param flagno The flag index to be set if this option is present
00538   \param argno The index into the argument array where the argument should
00539   be placed
00540   \sa AST_APP_OPTIONS, ast_app_parse_options
00541  */
00542 #define AST_APP_OPTION_ARG(option, flagno, argno) \
00543    [option] = { .flag = flagno, .arg_index = argno + 1 }
00544 
00545 /*!
00546   \brief Parses a string containing application options and sets flags/arguments.
00547   \param options The array of possible options declared with AST_APP_OPTIONS
00548   \param flags The flag structure to have option flags set
00549   \param args The array of argument pointers to hold arguments found
00550   \param optstr The string containing the options to be parsed
00551   \return zero for success, non-zero if an error occurs
00552   \sa AST_APP_OPTIONS
00553  */
00554 int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr);
00555 
00556    /*!
00557   \brief Parses a string containing application options and sets flags/arguments.
00558   \param options The array of possible options declared with AST_APP_OPTIONS
00559   \param flags The 64-bit flag structure to have option flags set
00560   \param args The array of argument pointers to hold arguments found
00561   \param optstr The string containing the options to be parsed
00562   \return zero for success, non-zero if an error occurs
00563   \sa AST_APP_OPTIONS
00564  */
00565 int ast_app_parse_options64(const struct ast_app_option *options, struct ast_flags64 *flags, char **args, char *optstr);
00566 
00567 /*! \brief Given a list of options array, return an option string based on passed flags
00568    \param options The array of possible options declared with AST_APP_OPTIONS
00569    \param flags The flags of the options that you wish to populate the buffer with
00570    \param buf The buffer to fill with the string of options
00571    \param len The maximum length of buf
00572 */
00573 void ast_app_options2str64(const struct ast_app_option *options, struct ast_flags64 *flags, char *buf, size_t len);
00574 
00575 /*! \brief Present a dialtone and collect a certain length extension.
00576     \return Returns 1 on valid extension entered, -1 on hangup, or 0 on invalid extension.
00577 \note Note that if 'collect' holds digits already, new digits will be appended, so be sure it's initialized properly */
00578 int ast_app_dtget(struct ast_channel *chan, const char *context, char *collect, size_t size, int maxlen, int timeout);
00579 
00580 /*! \brief Allow to record message and have a review option */
00581 int ast_record_review(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, const char *path);
00582 
00583 /*!\brief Decode an encoded control or extended ASCII character 
00584  * \param[in] stream String to decode
00585  * \param[out] result Decoded character
00586  * \param[out] consumed Number of characters used in stream to encode the character
00587  * \retval -1 Stream is of zero length
00588  * \retval 0 Success
00589  */
00590 int ast_get_encoded_char(const char *stream, char *result, size_t *consumed);
00591 
00592 /*!\brief Decode a stream of encoded control or extended ASCII characters
00593  * \param[in] stream Encoded string
00594  * \param[out] result Decoded string
00595  * \param[in] result_len Maximum size of the result buffer
00596  * \return A pointer to the result string
00597  */
00598 char *ast_get_encoded_str(const char *stream, char *result, size_t result_len);
00599 
00600 /*! \brief Decode a stream of encoded control or extended ASCII characters */
00601 int ast_str_get_encoded_str(struct ast_str **str, int maxlen, const char *stream);
00602 
00603 /*!
00604  * \brief Common routine for child processes, to close all fds prior to exec(2)
00605  * \param[in] n starting file descriptor number for closing all higher file descriptors
00606  * \since 1.6.1
00607  */
00608 void ast_close_fds_above_n(int n);
00609 
00610 /*!
00611  * \brief Common routine to safely fork without a chance of a signal handler firing badly in the child
00612  * \param[in] stop_reaper flag to determine if sigchld handler is replaced or not
00613  * \since 1.6.1
00614  */
00615 int ast_safe_fork(int stop_reaper);
00616 
00617 /*!
00618  * \brief Common routine to cleanup after fork'ed process is complete (if reaping was stopped)
00619  * \since 1.6.1
00620  */
00621 void ast_safe_fork_cleanup(void);
00622 
00623 /*!
00624  * \brief Common routine to parse time lengths, with optional time unit specifier
00625  * \param[in] timestr String to parse
00626  * \param[in] defunit Default unit type
00627  * \param[out] result Resulting value, specified in milliseconds
00628  * \retval 0 Success
00629  * \retval -1 Failure
00630  * \since 1.8
00631  */
00632 int ast_app_parse_timelen(const char *timestr, int *result, enum ast_timelen defunit);
00633 
00634 #if defined(__cplusplus) || defined(c_plusplus)
00635 }
00636 #endif
00637 
00638 #endif /* _ASTERISK_APP_H */

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