client/input.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2012-2013  Intel Corporation. All rights reserved.
   6  *
   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 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  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.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  *
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <errno.h>
  30 #include <glib.h>
  31 #include <readline/readline.h>
  32 #include <readline/history.h>
  33
  34 #include <gdbus.h>
  35 #include "input.h"
  36 #include "commands.h"
  37
  38 static DBusConnection *connection;
  39 static GMainLoop *main_loop;
  40 static bool interactive = false;
  41
  42 static bool save_input;
  43 static char *saved_line;
  44 static int saved_point;
  45
  46 void __connmanctl_quit(void)
  47 {
  48         if (main_loop != NULL)
  49                 g_main_loop_quit(main_loop);
  50 }
  51
  52 bool __connmanctl_is_interactive(void)
  53 {
  54         return interactive;
  55 }
  56
  57 void __connmanctl_save_rl(void)
  58 {
  59         save_input = !RL_ISSTATE(RL_STATE_DONE);
  60
  61         if (save_input) {
  62                 saved_point = rl_point;
  63                 saved_line = rl_copy_text(0, rl_end);
  64                 rl_save_prompt();
  65                 rl_replace_line("", 0);
  66                 rl_redisplay();
  67         }
  68 }
  69
  70 void __connmanctl_redraw_rl(void)
  71 {
  72         if (save_input) {
  73                 rl_restore_prompt();
  74                 rl_replace_line(saved_line, 0);
  75                 rl_point = saved_point;
  76                 rl_redisplay();
  77                 free(saved_line);
  78         }
  79
  80         save_input = 0;
  81 }
  82
  83 static void rl_handler(char *input)
  84 {
  85         char **args, **trim_args;
  86         int num, len, err, i;
  87
  88         if (input == NULL) {
  89                 rl_newline(1, '\n');
  90                 g_main_loop_quit(main_loop);
  91                 return;
  92         }
  93
  94         args = g_strsplit(input, " ", 0);
  95         num = g_strv_length(args);
  96
  97         trim_args = g_new0(char *, num + 1);
  98         for (i = 0, len = 0; i < num; i++) {
  99                 if (*args[i] != '\0') {
 100                         trim_args[len] = args[i];
 101                         len++;
 102                 }
 103         }
 104
 105         if (len > 0) {
 106
 107                 add_history(input);
 108
 109                 err = __connmanctl_commands(connection, trim_args, len);
 110
 111                 if (err > 0)
 112                         g_main_loop_quit(main_loop);
 113         }
 114
 115         g_strfreev(args);
 116         g_free(trim_args);
 117 }
 118
 119 static gboolean input_handler(GIOChannel *channel, GIOCondition condition,
 120                 gpointer user_data)
 121 {
 122         if (condition & (G_IO_HUP | G_IO_ERR | G_IO_NVAL)) {
 123                 g_main_loop_quit(main_loop);
 124                 return FALSE;
 125         }
 126
 127         rl_callback_read_char();
 128         return TRUE;
 129 }
 130
 131 static char **complete_agent(const char *text, int start, int end)
 132 {
 133         rl_attempted_completion_over = 1;
 134
 135         return NULL;
 136 }
 137
 138 static char **complete_command(const char *text, int start, int end)
 139 {
 140         char **command = NULL;
 141
 142         rl_attempted_completion_over = 1;
 143
 144         if (start == 0)
 145                 command = rl_completion_matches(text,
 146                                 __connmanctl_lookup_command);
 147
 148         return command;
 149 }
 150
 151 static struct {
 152         connmanctl_input_func_t cb;
 153         void *user_data;
 154 } agent_handler;
 155
 156 static void rl_agent_handler(char *input)
 157 {
 158         agent_handler.cb(input, agent_handler.user_data);
 159 }
 160
 161 void __connmanctl_agent_mode(const char *prompt,
 162                 connmanctl_input_func_t input_handler, void *user_data)
 163 {
 164         agent_handler.cb = input_handler;
 165         agent_handler.user_data = user_data;
 166
 167         if (input_handler != NULL)
 168                 rl_callback_handler_install(prompt, rl_agent_handler);
 169         else {
 170                 rl_set_prompt(prompt);
 171                 rl_callback_handler_remove();
 172                 rl_redisplay();
 173         }
 174         rl_attempted_completion_function = complete_agent;
 175 }
 176
 177 void __connmanctl_command_mode(void)
 178 {
 179         rl_callback_handler_install("connmanctl> ", rl_handler);
 180         rl_attempted_completion_function = complete_command;
 181 }
 182
 183 int __connmanctl_input_init(int argc, char *argv[])
 184 {
 185         char *help[] = {
 186                 "help",
 187                 NULL
 188         };
 189         guint source = 0;
 190         int err;
 191         DBusError dbus_err;
 192         GIOChannel *channel;
 193
 194         dbus_error_init(&dbus_err);
 195         connection = g_dbus_setup_bus(DBUS_BUS_SYSTEM, NULL, &dbus_err);
 196
 197         if (dbus_error_is_set(&dbus_err)) {
 198                 fprintf(stderr, "Error: %s\n", dbus_err.message);
 199                 dbus_error_free(&dbus_err);
 200                 return 1;
 201         }
 202
 203         channel = g_io_channel_unix_new(fileno(stdin));
 204         source = g_io_add_watch(channel, G_IO_IN|G_IO_ERR|G_IO_HUP|G_IO_NVAL,
 205                         input_handler, NULL);
 206         g_io_channel_unref(channel);
 207
 208         if (argc < 2) {
 209                 interactive = true;
 210
 211                 __connmanctl_command_mode();
 212                 err = -EINPROGRESS;
 213
 214         } else {
 215                 interactive = false;
 216
 217                 if (strcmp(argv[1], "--help") == 0 ||
 218                                 strcmp(argv[1], "-h") == 0)
 219                         err = __connmanctl_commands(connection, help, 1);
 220                 else
 221                         err = __connmanctl_commands(connection, argv + 1,
 222                                         argc -1);
 223         }
 224
 225         if (err == -EINPROGRESS) {
 226                 main_loop = g_main_loop_new(NULL, FALSE);
 227                 g_main_loop_run(main_loop);
 228
 229                 err = 0;
 230         }
 231
 232         g_source_remove(source);
 233
 234         if (interactive == true) {
 235                 rl_callback_handler_remove();
 236                 rl_message("");
 237         }
 238
 239         dbus_connection_unref(connection);
 240         if (main_loop != NULL)
 241                 g_main_loop_unref(main_loop);
 242
 243         if (err < 0)
 244                 err = -err;
 245         else
 246                 err = 0;
 247
 248         return err;
 249 }