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         if (interactive == false)
  60                 return;
  61
  62         save_input = !RL_ISSTATE(RL_STATE_DONE);
  63
  64         if (save_input) {
  65                 saved_point = rl_point;
  66                 saved_line = rl_copy_text(0, rl_end);
  67                 rl_save_prompt();
  68                 rl_replace_line("", 0);
  69                 rl_redisplay();
  70         }
  71 }
  72
  73 void __connmanctl_redraw_rl(void)
  74 {
  75         if (interactive == false)
  76                 return;
  77
  78         if (save_input) {
  79                 rl_restore_prompt();
  80                 rl_replace_line(saved_line, 0);
  81                 rl_point = saved_point;
  82                 rl_redisplay();
  83                 free(saved_line);
  84         }
  85
  86         save_input = 0;
  87 }
  88
  89 static void rl_handler(char *input)
  90 {
  91         char **args, **trim_args;
  92         int num, len, err, i;
  93
  94         if (input == NULL) {
  95                 rl_newline(1, '\n');
  96                 g_main_loop_quit(main_loop);
  97                 return;
  98         }
  99
 100         args = g_strsplit(input, " ", 0);
 101         num = g_strv_length(args);
 102
 103         trim_args = g_new0(char *, num);
 104         for (i = 0, len = 0; i < num; i++) {
 105                 if (*args[i] != '\0') {
 106                         trim_args[len] = args[i];
 107                         len++;
 108                 }
 109         }
 110
 111         if (len > 0) {
 112
 113                 add_history(input);
 114
 115                 err = __connmanctl_commands(connection, trim_args, len);
 116
 117                 if (err > 0)
 118                         g_main_loop_quit(main_loop);
 119         }
 120
 121         g_strfreev(args);
 122         g_free(trim_args);
 123 }
 124
 125 static gboolean input_handler(GIOChannel *channel, GIOCondition condition,
 126                 gpointer user_data)
 127 {
 128         if (condition & (G_IO_HUP | G_IO_ERR | G_IO_NVAL)) {
 129                 g_main_loop_quit(main_loop);
 130                 return FALSE;
 131         }
 132
 133         rl_callback_read_char();
 134         return TRUE;
 135 }
 136
 137 static char **complete_command(const char *text, int start, int end)
 138 {
 139         char **command = NULL;
 140
 141         rl_attempted_completion_over = 1;
 142
 143         if (start == 0)
 144                 command = rl_completion_matches(text,
 145                                 __connmanctl_lookup_command);
 146
 147         return command;
 148 }
 149
 150 int __connmanctl_input_init(int argc, char *argv[])
 151 {
 152         char *help[] = {
 153                 "help",
 154                 NULL
 155         };
 156         guint source = 0;
 157         int err;
 158         DBusError dbus_err;
 159
 160         dbus_error_init(&dbus_err);
 161         connection = g_dbus_setup_bus(DBUS_BUS_SYSTEM, NULL, &dbus_err);
 162
 163         if (dbus_error_is_set(&dbus_err)) {
 164                 fprintf(stderr, "Error: %s\n", dbus_err.message);
 165                 dbus_error_free(&dbus_err);
 166                 return 1;
 167         }
 168
 169         if (argc < 2) {
 170                 GIOChannel *channel;
 171
 172                 interactive = true;
 173
 174                 channel = g_io_channel_unix_new(fileno(stdin));
 175                 source = g_io_add_watch(channel,
 176                                 G_IO_IN|G_IO_ERR|G_IO_HUP|G_IO_NVAL,
 177                                 input_handler, NULL);
 178                 g_io_channel_unref(channel);
 179
 180                 rl_callback_handler_install("connmanctl> ", rl_handler);
 181                 rl_attempted_completion_function = complete_command;
 182                 err = -EINPROGRESS;
 183
 184         } else {
 185                 interactive = false;
 186
 187                 if (strcmp(argv[1], "--help") == 0 ||
 188                                 strcmp(argv[1], "-h") == 0)
 189                         err = __connmanctl_commands(connection, help, 1);
 190                 else
 191                         err = __connmanctl_commands(connection, argv + 1,
 192                                         argc -1);
 193         }
 194
 195         if (err == -EINPROGRESS) {
 196                 main_loop = g_main_loop_new(NULL, FALSE);
 197                 g_main_loop_run(main_loop);
 198
 199                 if (source > 0)
 200                         g_source_remove(source);
 201
 202                 err = 0;
 203         }
 204
 205         if (interactive == true) {
 206                 rl_callback_handler_remove();
 207                 rl_message("");
 208         }
 209
 210         dbus_connection_unref(connection);
 211         if (main_loop != NULL)
 212                 g_main_loop_unref(main_loop);
 213
 214         if (err < 0)
 215                 err = -err;
 216         else
 217                 err = 0;
 218
 219         return err;
 220 }