mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
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6d31c9313f
Enable parsing of the command-line options by the command module. The parsed command-line option values are stored in command_options list and made available through the module’s public API: command_option_get – allows querying options by name, command_has_options – checks existence of the options.
716 lines
14 KiB
C
716 lines
14 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2017-2019 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <string.h>
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#include <getopt.h>
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#include <ell/ell.h>
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#include <readline/readline.h>
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#include "command.h"
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#include "display.h"
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static struct l_queue *command_families;
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static struct l_queue *command_options;
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static int exit_status;
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static bool interactive_mode;
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static struct command_noninteractive {
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char **argv;
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int argc;
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} command_noninteractive;
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struct command_option {
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const char *name;
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char *value;
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};
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static void command_options_destroy(void *data)
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{
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struct command_option *option = data;
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l_free(option->value);
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l_free(option);
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}
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const char *command_option_get(const char *name)
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{
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const struct l_queue_entry *entry;
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for (entry = l_queue_get_entries(command_options); entry;
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entry = entry->next) {
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const struct command_option *option = entry->data;
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if (strcmp(option->name, name))
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continue;
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return option->value;
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}
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return NULL;
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}
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bool command_has_options(void)
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{
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return !l_queue_isempty(command_options);
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}
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static enum cmd_status cmd_version(const char *entity,
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char **argv, int argc)
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{
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display("IWD version %s\n", VERSION);
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return CMD_STATUS_DONE;
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}
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static enum cmd_status cmd_quit(const char *entity,
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char **argv, int argc)
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{
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display_quit();
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l_main_quit();
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return CMD_STATUS_DONE;
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}
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static const struct command misc_commands[] = {
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{ NULL, "version", NULL, cmd_version, "Display version" },
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{ NULL, "quit", NULL, cmd_quit, "Quit program" },
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{ NULL, "exit", NULL, cmd_quit },
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{ NULL, "help" },
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{ }
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};
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static char *cmd_generator(const char *text, int state)
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{
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static const struct l_queue_entry *entry;
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static size_t index;
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static size_t len;
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const char *cmd;
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if (!state) {
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len = strlen(text);
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index = 0;
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entry = l_queue_get_entries(command_families);
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}
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while (entry) {
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const struct command_family *family = entry->data;
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entry = entry->next;
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if (strncmp(family->name, text, len))
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continue;
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return l_strdup(family->name);
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}
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while ((cmd = misc_commands[index].cmd)) {
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index++;
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if (strncmp(cmd, text, len))
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continue;
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return l_strdup(cmd);
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}
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return NULL;
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}
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static bool cmd_completion_cmd_has_arg(const char *cmd,
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const struct command_family *family)
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{
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size_t i;
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char **matches = NULL;
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bool status;
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for (i = 0; family->command_list[i].cmd; i++) {
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if (strcmp(family->command_list[i].cmd, cmd))
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continue;
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return family->command_list[i].arg ? true : false;
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}
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if (!family->family_arg_completion)
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return false;
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matches = rl_completion_matches(cmd, family->family_arg_completion);
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if (!matches)
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return false;
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status = false;
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for (i = 0; matches[i]; i++) {
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if (strcmp(matches[i], cmd))
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continue;
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status = true;
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break;
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}
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l_strfreev(matches);
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return status;
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}
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static bool find_next_token(int *i, const char *token, int token_len)
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{
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char *line = rl_line_buffer;
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while (*i && line[*i] == ' ')
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(*i)--;
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while (*i && line[*i] != ' ')
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(*i)--;
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return !strncmp(line + (line[*i] == ' ' ? *i + 1 : *i),
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token, token_len);
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}
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bool command_line_find_token(const char *token, uint8_t num_to_inspect)
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{
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int i = rl_point - 1;
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int len = strlen(token);
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if (!len)
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return false;
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while (i && num_to_inspect) {
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if (find_next_token(&i, token, len))
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return true;
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num_to_inspect--;
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}
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return false;
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}
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static char **cmd_completion_match_entity_cmd(const char *cmd, const char *text,
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const struct command *cmd_list)
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{
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char **matches = NULL;
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size_t i;
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for (i = 0; cmd_list[i].cmd; i++) {
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if (strcmp(cmd_list[i].cmd, cmd))
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continue;
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if (!cmd_list[i].completion)
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break;
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matches = rl_completion_matches(text, cmd_list[i].completion);
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break;
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}
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return matches;
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}
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static char **cmd_completion_match_family_cmd(const char *cmd_family,
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char *args, const char *text,
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bool ends_with_space)
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{
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const struct l_queue_entry *entry;
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const char *arg1;
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const char *arg2;
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const char *arg3;
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char **matches = NULL;
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for (entry = l_queue_get_entries(command_families); entry;
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entry = entry->next) {
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const struct command_family *family = entry->data;
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if (strcmp(family->name, cmd_family))
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continue;
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arg1 = strtok_r(NULL, " ", &args);
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if (!arg1) {
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if (!family->family_arg_completion)
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break;
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matches = rl_completion_matches(text,
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family->family_arg_completion);
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break;
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}
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arg2 = strtok_r(NULL, " ", &args);
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if (!arg2 && !ends_with_space) {
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if (!family->family_arg_completion)
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break;
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matches = rl_completion_matches(text,
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family->family_arg_completion);
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break;
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} else if (!arg2 && ends_with_space) {
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if (!cmd_completion_cmd_has_arg(arg1, family))
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break;
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if (!family->entity_arg_completion)
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break;
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matches = rl_completion_matches(text,
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family->entity_arg_completion);
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break;
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}
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arg3 = strtok_r(NULL, " ", &args);
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if (!arg3 && !ends_with_space) {
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if (!family->entity_arg_completion)
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break;
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matches = rl_completion_matches(text,
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family->entity_arg_completion);
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break;
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}
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if (family->set_default_entity)
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family->set_default_entity(arg1);
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matches = cmd_completion_match_entity_cmd(arg2, text,
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family->command_list);
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break;
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}
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return matches;
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}
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char **command_completion(const char *text, int start, int end)
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{
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char **matches = NULL;
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const char *family;
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char *args = NULL;
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char *prompt = NULL;
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bool ends_with_space = false;
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if (display_agent_is_active()) {
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rl_attempted_completion_over = 1;
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return NULL;
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}
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if (!start) {
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matches = rl_completion_matches(text, cmd_generator);
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goto done;
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}
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prompt = rl_copy_text(0, rl_end);
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family = strtok_r(prompt, " ", &args);
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if (!family)
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goto done;
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if (args) {
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int len = strlen(args);
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if (len > 0 && args[len - 1] == ' ')
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ends_with_space = true;
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}
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matches = cmd_completion_match_family_cmd(family, args, text,
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ends_with_space);
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done:
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l_free(prompt);
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if (!matches)
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rl_attempted_completion_over = 1;
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return matches;
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}
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char *command_entity_arg_completion(const char *text, int state,
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const struct command *command_list)
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{
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static size_t index;
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static size_t len;
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const char *cmd;
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if (!state) {
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index = 0;
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len = strlen(text);
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}
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while ((cmd = command_list[index].cmd)) {
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if (!command_list[index++].entity)
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continue;
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if (strncmp(cmd, text, len))
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continue;
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return l_strdup(cmd);
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}
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return NULL;
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}
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static void execute_cmd(const char *family, const char *entity,
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const struct command *cmd,
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char **argv, int argc)
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{
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enum cmd_status status;
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display_refresh_set_cmd(family, entity, cmd, argv, argc);
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status = cmd->function(entity, argv, argc);
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if (status != CMD_STATUS_TRIGGERED && status != CMD_STATUS_DONE)
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goto error;
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if (status == CMD_STATUS_DONE && !interactive_mode) {
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l_main_quit();
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return;
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}
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if (!interactive_mode)
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return;
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if (cmd->refreshable)
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display_refresh_timeout_set();
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return;
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error:
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switch (status) {
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case CMD_STATUS_INVALID_ARGS:
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display("Invalid command. Use the following pattern:\n");
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display_command_line(family, cmd);
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break;
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case CMD_STATUS_INVALID_VALUE:
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break;
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case CMD_STATUS_UNSUPPORTED:
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display_refresh_reset();
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display("Unsupported command\n");
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break;
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case CMD_STATUS_FAILED:
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goto failure;
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case CMD_STATUS_TRIGGERED:
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case CMD_STATUS_DONE:
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l_error("Unknown command status.");
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break;
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}
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if (interactive_mode)
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return;
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failure:
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exit_status = EXIT_FAILURE;
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l_main_quit();
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}
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static bool match_cmd(const char *family, const char *param,
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char **argv, int argc,
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const struct command *command_list)
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{
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size_t i;
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for (i = 0; command_list[i].cmd; i++) {
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const char *entity;
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const char *cmd;
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int offset;
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if (command_list[i].entity) {
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if (argc < 1)
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continue;
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entity = param;
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cmd = argv[0];
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offset = 1;
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} else {
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entity = NULL;
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cmd = param;
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offset = 0;
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}
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if (strcmp(command_list[i].cmd, cmd))
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continue;
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if (!command_list[i].function)
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return false;
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execute_cmd(family, entity, &command_list[i],
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argv + offset, argc - offset);
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return true;
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}
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return false;
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}
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static bool match_cmd_family(char **argv, int argc)
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{
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const struct l_queue_entry *entry;
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if (argc < 2)
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return false;
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for (entry = l_queue_get_entries(command_families); entry;
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entry = entry->next) {
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const struct command_family *family = entry->data;
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if (strcmp(family->name, argv[0]))
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continue;
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return match_cmd(family->name, argv[1], argv + 2, argc - 2,
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family->command_list);
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}
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return false;
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}
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static void list_commands(const char *command_family,
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const struct command *cmd_list)
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{
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size_t i;
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for (i = 0; cmd_list[i].cmd; i++) {
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if (!cmd_list[i].desc)
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continue;
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display_command_line(command_family, &cmd_list[i]);
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}
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}
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static void list_cmd_families(void)
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{
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const struct l_queue_entry *entry;
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for (entry = l_queue_get_entries(command_families); entry;
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entry = entry->next) {
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const struct command_family *family = entry->data;
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display("\n%s:\n", family->caption);
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list_commands(family->name, family->command_list);
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}
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}
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static bool command_match_misc_commands(char **argv, int argc)
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{
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if (match_cmd(NULL, argv[0], argv + 1, argc - 1, misc_commands))
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return true;
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if (strcmp(argv[0], "help"))
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return false;
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display_table_header("Available commands", MARGIN "%-*s%-*s",
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50, "Commands", 28, "Description");
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list_cmd_families();
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if (!interactive_mode)
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return true;
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display("\nMiscellaneous:\n");
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list_commands(NULL, misc_commands);
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return true;
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}
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void command_process_prompt(char **argv, int argc)
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{
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if (argc == 0)
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return;
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if (match_cmd_family(argv, argc))
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return;
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if (!interactive_mode) {
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if (command_match_misc_commands(argv, argc)) {
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exit_status = EXIT_SUCCESS;
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goto quit;
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}
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display_error("Invalid command\n");
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exit_status = EXIT_FAILURE;
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quit:
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l_main_quit();
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return;
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}
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display_refresh_reset();
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if (command_match_misc_commands(argv, argc))
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return;
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display_error("Invalid command\n");
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}
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void command_noninteractive_trigger(void)
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{
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if (!command_noninteractive.argc)
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return;
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command_process_prompt(command_noninteractive.argv,
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command_noninteractive.argc);
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}
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bool command_is_interactive_mode(void)
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{
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return interactive_mode;
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}
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void command_set_exit_status(int status)
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{
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exit_status = status;
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}
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int command_get_exit_status(void)
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{
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return exit_status;
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}
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void command_reset_default_entities(void)
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{
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const struct l_queue_entry *entry;
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for (entry = l_queue_get_entries(command_families); entry;
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entry = entry->next) {
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struct command_family *family = entry->data;
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if (!family->reset_default_entity)
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continue;
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family->reset_default_entity();
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}
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}
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void command_family_register(const struct command_family *family)
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{
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l_queue_push_tail(command_families, (void *) family);
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}
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void command_family_unregister(const struct command_family *family)
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{
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l_queue_remove(command_families, (void *) family);
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}
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static const struct option command_opts[] = {
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{ COMMAND_OPTION_USERNAME, required_argument, NULL, 'u' },
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{ COMMAND_OPTION_PASSWORD, required_argument, NULL, 'p' },
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{ COMMAND_OPTION_PASSPHRASE, required_argument, NULL, 'P' },
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|
{ }
|
|
};
|
|
|
|
extern struct command_family_desc __start___command[];
|
|
extern struct command_family_desc __stop___command[];
|
|
|
|
bool command_init(char **argv, int argc)
|
|
{
|
|
struct command_family_desc *desc;
|
|
int opt;
|
|
|
|
command_families = l_queue_new();
|
|
command_options = l_queue_new();
|
|
|
|
for (desc = __start___command; desc < __stop___command; desc++) {
|
|
if (!desc->init)
|
|
continue;
|
|
|
|
desc->init();
|
|
}
|
|
|
|
for (;;) {
|
|
struct command_option *option;
|
|
|
|
opt = getopt_long(argc, argv, "u:p:P:", command_opts, NULL);
|
|
|
|
switch (opt) {
|
|
case 'u':
|
|
option = l_new(struct command_option, 1);
|
|
option->name = COMMAND_OPTION_USERNAME;
|
|
option->value = l_strdup(optarg);
|
|
|
|
l_queue_push_tail(command_options, option);
|
|
|
|
break;
|
|
case 'p':
|
|
option = l_new(struct command_option, 1);
|
|
option->name = COMMAND_OPTION_PASSWORD;
|
|
option->value = l_strdup(optarg);
|
|
|
|
l_queue_push_tail(command_options, option);
|
|
|
|
break;
|
|
case 'P':
|
|
option = l_new(struct command_option, 1);
|
|
option->name = COMMAND_OPTION_PASSPHRASE;
|
|
option->value = l_strdup(optarg);
|
|
|
|
l_queue_push_tail(command_options, option);
|
|
|
|
break;
|
|
case -1:
|
|
goto options_parsed;
|
|
case '?':
|
|
exit_status = EXIT_FAILURE;
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|
|
options_parsed:
|
|
argv += optind;
|
|
argc -= optind;
|
|
|
|
if (argc < 2) {
|
|
interactive_mode = true;
|
|
return true;
|
|
}
|
|
|
|
command_noninteractive.argv = argv;
|
|
command_noninteractive.argc = argc;
|
|
|
|
return false;
|
|
}
|
|
|
|
void command_exit(void)
|
|
{
|
|
struct command_family_desc *desc;
|
|
|
|
for (desc = __start___command; desc < __stop___command; desc++) {
|
|
if (!desc->exit)
|
|
continue;
|
|
|
|
desc->exit();
|
|
}
|
|
|
|
l_queue_destroy(command_families, NULL);
|
|
command_families = NULL;
|
|
|
|
l_queue_destroy(command_options, command_options_destroy);
|
|
command_options = NULL;
|
|
}
|