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+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ * \brief Standard Command Line Interface
+ */
+
+#ifndef _ASTERISK_CLI_H
+#define _ASTERISK_CLI_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <stdarg.h>
+
+#include "asterisk/linkedlists.h"
+
+void ast_cli(int fd, char *fmt, ...)
+ __attribute__((format(printf, 2, 3)));
+
+#define RESULT_SUCCESS 0
+#define RESULT_SHOWUSAGE 1
+#define RESULT_FAILURE 2
+
+#define AST_MAX_CMD_LEN 16
+
+#define AST_MAX_ARGS 64
+
+#define AST_CLI_COMPLETE_EOF "_EOF_"
+
+/*! \brief A command line entry */
+struct ast_cli_entry {
+ char * const cmda[AST_MAX_CMD_LEN];
+ /*! Handler for the command (fd for output, # of args, argument list).
+ Returns RESULT_SHOWUSAGE for improper arguments.
+ argv[] has argc 'useful' entries, and an additional NULL entry
+ at the end so that clients requiring NULL terminated arrays
+ can use it without need for copies.
+ You can overwrite argv or the strings it points to, but remember
+ that this memory is deallocated after the handler returns.
+ */
+ int (*handler)(int fd, int argc, char *argv[]);
+ /*! Summary of the command (< 60 characters) */
+ const char *summary;
+ /*! Detailed usage information */
+ const char *usage;
+ /*! Generate the n-th (starting from 0) possible completion
+ for a given 'word' following 'line' in position 'pos'.
+ 'line' and 'word' must not be modified.
+ Must return a malloc'ed string with the n-th value when available,
+ or NULL if the n-th completion does not exist.
+ Typically, the function is called with increasing values for n
+ until a NULL is returned.
+ */
+ char *(*generator)(const char *line, const char *word, int pos, int n);
+ struct ast_cli_entry *deprecate_cmd;
+ /*! For keeping track of usage */
+ int inuse;
+ struct module *module; /*! module this belongs to */
+ char *_full_cmd; /* built at load time from cmda[] */
+ /* This gets set in ast_cli_register()
+ It then gets set to something different when the deprecated command
+ is run for the first time (ie; after we warn the user that it's deprecated)
+ */
+ int deprecated;
+ char *_deprecated_by; /* copied from the "parent" _full_cmd, on deprecated commands */
+ /*! For linking */
+ AST_LIST_ENTRY(ast_cli_entry) list;
+};
+
+/*!
+ * \brief Helper function to generate cli entries from a NULL-terminated array.
+ * Returns the n-th matching entry from the array, or NULL if not found.
+ * Can be used to implement generate() for static entries as below
+ * (in this example we complete the word in position 2):
+ \code
+ char *my_generate(const char *line, const char *word, int pos, int n)
+ {
+ static char *choices = { "one", "two", "three", NULL };
+ if (pos == 2)
+ return ast_cli_complete(word, choices, n);
+ else
+ return NULL;
+ }
+ \endcode
+ */
+char *ast_cli_complete(const char *word, char *const choices[], int pos);
+
+/*! \brief Interprets a command
+ * Interpret a command s, sending output to fd
+ * Returns 0 on succes, -1 on failure
+ */
+int ast_cli_command(int fd, const char *s);
+
+/*!
+ * \brief Executes multiple CLI commands
+ * Interpret strings separated by '\0' and execute each one, sending output to fd
+ * \param size is the total size of the string
+ * \retval number of commands executed
+ */
+int ast_cli_command_multiple(int fd, size_t size, const char *s);
+
+/*! \brief Registers a command or an array of commands
+ * \param e which cli entry to register
+ * Register your own command
+ * Returns 0 on success, -1 on failure
+ */
+int ast_cli_register(struct ast_cli_entry *e);
+
+/*!
+ * \brief Register multiple commands
+ * \param e pointer to first cli entry to register
+ * \param len number of entries to register
+ */
+void ast_cli_register_multiple(struct ast_cli_entry *e, int len);
+
+/*! \brief Unregisters a command or an array of commands
+ *
+ * \param e which cli entry to unregister
+ * Unregister your own command. You must pass a completed ast_cli_entry structure
+ * Returns 0.
+ */
+int ast_cli_unregister(struct ast_cli_entry *e);
+
+/*!
+ * \brief Unregister multiple commands
+ * \param e pointer to first cli entry to unregister
+ * \param len number of entries to unregister
+ */
+void ast_cli_unregister_multiple(struct ast_cli_entry *e, int len);
+
+/*! \brief Readline madness
+ * Useful for readline, that's about it
+ * Returns 0 on success, -1 on failure
+ */
+char *ast_cli_generator(const char *, const char *, int);
+
+int ast_cli_generatornummatches(const char *, const char *);
+
+/*!
+ * \brief Generates a NULL-terminated array of strings that
+ * 1) begin with the string in the second parameter, and
+ * 2) are valid in a command after the string in the first parameter.
+ *
+ * The first entry (offset 0) of the result is the longest common substring
+ * in the results, useful to extend the string that has been completed.
+ * Subsequent entries are all possible values, followe by a NULL.
+ * All strings and the array itself are malloc'ed and must be freed
+ * by the caller.
+ */
+char **ast_cli_completion_matches(const char *, const char *);
+
+/*!
+ * \brief Command completion for the list of active channels
+ *
+ * This can be called from a CLI command completion function that wants to
+ * complete from the list of active channels. 'rpos' is the required
+ * position in the command. This function will return NULL immediately if
+ * 'rpos' is not the same as the current position, 'pos'.
+ */
+char *ast_complete_channels(const char *line, const char *word, int pos, int state, int rpos);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* _ASTERISK_CLI_H */