Thu Oct 11 06:49:35 2012

Asterisk developer's documentation


res_clialiases.c File Reference

CLI Aliases. More...

#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/config.h"
#include "asterisk/cli.h"
#include "asterisk/astobj2.h"

Include dependency graph for res_clialiases.c:

Go to the source code of this file.

Data Structures

struct  cli_alias

Defines

#define FORMAT   "%-50.50s %-50.50s\n"
#define MAX_ALIAS_BUCKETS   53

Functions

static void __reg_module (void)
static void __unreg_module (void)
static int alias_cmp_cb (void *obj, void *arg, int flags)
 Comparison function used for aliases.
static void alias_destroy (void *obj)
 Destruction function used for aliases.
static int alias_hash_cb (const void *obj, const int flags)
 Hashing function used for aliases.
static int alias_marked (void *obj, void *arg, int flags)
 Function called to to see if an alias is marked for destruction, they always are!
static char * alias_show (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 CLI Command to display CLI Aliases.
static char * cli_alias_passthrough (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 Function which passes through an aliased CLI command to the real one.
static void load_config (int reload)
 Function called to load or reload the configuration file.
static int load_module (void)
 Function called to load the module.
static int reload_module (void)
 Function called to reload the module.
static int unload_module (void)
 Function called to unload the module.

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "CLI Aliases" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .reload = reload_module, }
static struct ast_module_infoast_module_info = &__mod_info
static struct ast_cli_entry cli_alias []
 CLI commands to interact with things.
static struct ao2_containercli_aliases
static const char config_file [] = "cli_aliases.conf"


Detailed Description

CLI Aliases.

Author:
Joshua Colp <jcolp@digium.com> 
This module provides the capability to create aliases to other CLI commands.

Definition in file res_clialiases.c.


Define Documentation

#define FORMAT   "%-50.50s %-50.50s\n"

#define MAX_ALIAS_BUCKETS   53

Maximum number of buckets for CLI aliases

Definition at line 40 of file res_clialiases.c.

Referenced by load_module().


Function Documentation

static void __reg_module ( void   )  [static]

Definition at line 262 of file res_clialiases.c.

static void __unreg_module ( void   )  [static]

Definition at line 262 of file res_clialiases.c.

static int alias_cmp_cb ( void *  obj,
void *  arg,
int  flags 
) [static]

Comparison function used for aliases.

Definition at line 61 of file res_clialiases.c.

References cli_alias::cli_entry, CMP_MATCH, CMP_STOP, and ast_cli_entry::command.

Referenced by load_module().

00062 {
00063    const struct cli_alias *alias0 = obj, *alias1 = arg;
00064 
00065    return (alias0->cli_entry.command == alias1->cli_entry.command ? CMP_MATCH | CMP_STOP : 0);
00066 }

static void alias_destroy ( void *  obj  )  [static]

Destruction function used for aliases.

Definition at line 69 of file res_clialiases.c.

References cli_alias::alias, ast_cli_unregister(), and cli_alias::cli_entry.

Referenced by load_config().

00070 {
00071    struct cli_alias *alias = obj;
00072 
00073    /* Unregister the CLI entry from the core */
00074    ast_cli_unregister(&alias->cli_entry);
00075 
00076    return;
00077 }

static int alias_hash_cb ( const void *  obj,
const int  flags 
) [static]

Hashing function used for aliases.

Definition at line 54 of file res_clialiases.c.

References cli_alias::alias, ast_str_hash(), cli_alias::cli_entry, and ast_cli_entry::command.

Referenced by load_module().

00055 {
00056    const struct cli_alias *alias = obj;
00057    return ast_str_hash(alias->cli_entry.command);
00058 }

static int alias_marked ( void *  obj,
void *  arg,
int  flags 
) [static]

Function called to to see if an alias is marked for destruction, they always are!

Definition at line 172 of file res_clialiases.c.

References CMP_MATCH.

Referenced by load_config().

00173 {
00174    return CMP_MATCH;
00175 }

static char* alias_show ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

CLI Command to display CLI Aliases.

Definition at line 137 of file res_clialiases.c.

References cli_alias::alias, ao2_iterator_destroy(), ao2_iterator_init(), ao2_iterator_next, ao2_ref, ast_cli(), CLI_GENERATE, CLI_INIT, CLI_SUCCESS, ast_cli_entry::command, ast_cli_args::fd, FORMAT, cli_alias::real_cmd, and ast_cli_entry::usage.

00138 {
00139 #define FORMAT "%-50.50s %-50.50s\n"
00140    struct cli_alias *alias;
00141    struct ao2_iterator i;
00142 
00143    switch (cmd) {
00144    case CLI_INIT:
00145       e->command = "cli show aliases";
00146       e->usage =
00147          "Usage: cli show aliases\n"
00148          "       Displays a list of aliased CLI commands.\n";
00149       return NULL;
00150    case CLI_GENERATE:
00151       return NULL;
00152    }
00153 
00154    ast_cli(a->fd, FORMAT, "Alias Command", "Real Command");
00155 
00156    i = ao2_iterator_init(cli_aliases, 0);
00157    for (; (alias = ao2_iterator_next(&i)); ao2_ref(alias, -1)) {
00158       ast_cli(a->fd, FORMAT, alias->alias, alias->real_cmd);
00159    }
00160    ao2_iterator_destroy(&i);
00161 
00162    return CLI_SUCCESS;
00163 #undef FORMAT
00164 }

static char* cli_alias_passthrough ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Function which passes through an aliased CLI command to the real one.

Definition at line 80 of file res_clialiases.c.

References cli_alias::alias, ao2_find, ao2_ref, ast_cli_args::argc, ast_cli_entry::args, ast_cli_args::argv, ast_cli_command, ast_cli_generator(), ast_str_alloca, ast_str_append(), ast_str_buffer(), ast_strlen_zero(), cli_alias::cli_entry, CLI_GENERATE, CLI_INIT, CLI_SUCCESS, ast_cli_entry::command, ast_cli_args::fd, generator, ast_cli_args::line, ast_cli_args::n, OBJ_POINTER, cli_alias::real_cmd, and ast_cli_args::word.

Referenced by load_config().

00081 {
00082    struct cli_alias *alias;
00083    struct cli_alias tmp = {
00084       .cli_entry.command = e->command,
00085    };
00086    char *generator;
00087    const char *line;
00088 
00089    /* Try to find the alias based on the CLI entry */
00090    if (!(alias = ao2_find(cli_aliases, &tmp, OBJ_POINTER))) {
00091       return 0;
00092    }
00093 
00094    switch (cmd) {
00095    case CLI_INIT:
00096       ao2_ref(alias, -1);
00097       return NULL;
00098    case CLI_GENERATE:
00099       line = a->line;
00100       line += (strlen(alias->alias));
00101       if (!strncasecmp(alias->alias, alias->real_cmd, strlen(alias->alias))) {
00102          generator = NULL;
00103       } else if (!ast_strlen_zero(a->word)) {
00104          struct ast_str *real_cmd = ast_str_alloca(strlen(alias->real_cmd) + strlen(line) + 1);
00105          ast_str_append(&real_cmd, 0, "%s%s", alias->real_cmd, line);
00106          generator = ast_cli_generator(ast_str_buffer(real_cmd), a->word, a->n);
00107       } else {
00108          generator = ast_cli_generator(alias->real_cmd, a->word, a->n);
00109       }
00110       ao2_ref(alias, -1);
00111       return generator;
00112    }
00113 
00114    /* If they gave us extra arguments we need to construct a string to pass in */
00115    if (a->argc != e->args) {
00116       struct ast_str *real_cmd = ast_str_alloca(2048);
00117       int i;
00118 
00119       ast_str_append(&real_cmd, 0, "%s", alias->real_cmd);
00120 
00121       /* Add the additional arguments that have been passed in */
00122       for (i = e->args + 1; i <= a->argc; i++) {
00123          ast_str_append(&real_cmd, 0, " %s", a->argv[i - 1]);
00124       }
00125 
00126       ast_cli_command(a->fd, ast_str_buffer(real_cmd));
00127    } else {
00128       ast_cli_command(a->fd, alias->real_cmd);
00129    }
00130 
00131    ao2_ref(alias, -1);
00132 
00133    return CLI_SUCCESS;
00134 }

static void load_config ( int  reload  )  [static]

Function called to load or reload the configuration file.

Definition at line 178 of file res_clialiases.c.

References cli_alias::alias, alias_destroy(), alias_marked(), ao2_alloc, ao2_callback, ao2_link, ao2_ref, ast_cli_register(), ast_config_destroy(), ast_config_load, ast_log(), ast_variable_browse(), ast_verbose, cli_alias_passthrough(), cli_alias::cli_entry, ast_cli_entry::command, CONFIG_FLAG_FILEUNCHANGED, CONFIG_STATUS_FILEINVALID, CONFIG_STATUS_FILEUNCHANGED, ast_cli_entry::handler, LOG_ERROR, LOG_WARNING, ast_variable::name, ast_variable::next, OBJ_MULTIPLE, OBJ_NODATA, OBJ_UNLINK, cli_alias::real_cmd, ast_cli_entry::usage, ast_variable::value, and VERBOSE_PREFIX_2.

00179 {
00180    struct ast_config *cfg = NULL;
00181    struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
00182    struct cli_alias *alias;
00183    struct ast_variable *v, *v1;
00184 
00185    if (!(cfg = ast_config_load(config_file, config_flags)) || cfg == CONFIG_STATUS_FILEINVALID) {
00186       ast_log(LOG_ERROR, "res_clialiases configuration file '%s' not found\n", config_file);
00187       return;
00188    } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
00189       return;
00190    }
00191 
00192    /* Destroy any existing CLI aliases */
00193    if (reload) {
00194       ao2_callback(cli_aliases, OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE , alias_marked, NULL);
00195    }
00196 
00197    for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
00198       if (strcmp(v->name, "template")) {
00199          ast_log(LOG_WARNING, "%s is not a correct option in [%s]\n", v->name, "general");
00200          continue;
00201       }
00202       /* Read in those there CLI aliases */
00203       for (v1 = ast_variable_browse(cfg, v->value); v1; v1 = v1->next) {
00204          if (!(alias = ao2_alloc((sizeof(*alias) + strlen(v1->name) + strlen(v1->value) + 2), alias_destroy))) {
00205             continue;
00206          }
00207          alias->alias = ((char *) alias) + sizeof(*alias);
00208          alias->real_cmd = ((char *) alias->alias) + strlen(v1->name) + 1;
00209          strcpy(alias->alias, v1->name);
00210          strcpy(alias->real_cmd, v1->value);
00211          alias->cli_entry.handler = cli_alias_passthrough;
00212          alias->cli_entry.command = alias->alias;
00213          alias->cli_entry.usage = "Aliased CLI Command\n";
00214 
00215          ast_cli_register(&alias->cli_entry);
00216          ao2_link(cli_aliases, alias);
00217          ast_verbose(VERBOSE_PREFIX_2 "Aliased CLI command '%s' to '%s'\n", v1->name, v1->value);
00218          ao2_ref(alias, -1);
00219       }
00220    }
00221 
00222    ast_config_destroy(cfg);
00223 
00224    return;
00225 }

static int load_module ( void   )  [static]

static int reload_module ( void   )  [static]

Function called to reload the module.

Definition at line 228 of file res_clialiases.c.

References load_config().

00229 {
00230    load_config(1);
00231    return 0;
00232 }

static int unload_module ( void   )  [static]

Function called to unload the module.

Definition at line 235 of file res_clialiases.c.

References ao2_ref, ARRAY_LEN, and ast_cli_unregister_multiple().

00236 {
00237    ao2_ref(cli_aliases, -1);
00238 
00239    ast_cli_unregister_multiple(cli_alias, ARRAY_LEN(cli_alias));
00240 
00241    return 0;
00242 }


Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "CLI Aliases" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .reload = reload_module, } [static]

Definition at line 262 of file res_clialiases.c.

Definition at line 262 of file res_clialiases.c.

struct ast_cli_entry cli_alias[] [static]

Initial value:

 {
   AST_CLI_DEFINE(alias_show, "Show CLI command aliases"),
}
CLI commands to interact with things.

Definition at line 167 of file res_clialiases.c.

struct ao2_container* cli_aliases [static]

Definition at line 51 of file res_clialiases.c.

const char config_file[] = "cli_aliases.conf" [static]

Configuration file used for this application

Definition at line 43 of file res_clialiases.c.


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