source: root_commands.c @ f892236

/********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2013 Wilmer van der Gaast and others                *
  \********************************************************************/

/* User manager (root) commands                                         */

/*
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License with
  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  if not, write to the Free Software Foundation, Inc., 51 Franklin St.,
  Fifth Floor, Boston, MA  02110-1301  USA
*/

#define BITLBEE_CORE
#include "commands.h"
#include "bitlbee.h"
#include "help.h"
#include "ipc.h"

void root_command_string(irc_t *irc, char *command)
{
        root_command(irc, split_command_parts(command, 0));
}

#define MIN_ARGS(x, y ...)                                                    \
        do                                                                     \
        {                                                                      \
                int blaat;                                                     \
                for (blaat = 0; blaat <= x; blaat++) {                         \
                        if (cmd[blaat] == NULL)                               \
                        {                                                      \
                                irc_rootmsg(irc, "Not enough parameters given (need %d).", x); \
                                return y;                                      \
                        } }                                                      \
        } while (0)

void root_command(irc_t *irc, char *cmd[])
{
        int i, len;

        if (!cmd[0]) {
                return;
        }

        len = strlen(cmd[0]);
        for (i = 0; root_commands[i].command; i++) {
                if (g_strncasecmp(root_commands[i].command, cmd[0], len) == 0) {
                        if (root_commands[i + 1].command &&
                            g_strncasecmp(root_commands[i + 1].command, cmd[0], len) == 0) {
                                /* Only match on the first letters if the match is unique. */
                                break;
                        }

                        MIN_ARGS(root_commands[i].required_parameters);

                        root_commands[i].execute(irc, cmd);
                        return;
                }
        }

        irc_rootmsg(irc, "Unknown command: %s. Please use \x02help commands\x02 to get a list of available commands.",
                    cmd[0]);
}

static void cmd_help(irc_t *irc, char **cmd)
{
        char param[80];
        int i;
        char *s;

        memset(param, 0, sizeof(param));
        for (i = 1; (cmd[i] != NULL && (strlen(param) < (sizeof(param) - 1))); i++) {
                if (i != 1) {   // prepend space except for the first parameter
                        strcat(param, " ");
                }
                strncat(param, cmd[i], sizeof(param) - strlen(param) - 1);
        }

        s = help_get(&(global.help), param);
        if (!s) {
                s = help_get(&(global.help), "");
        }

        if (s) {
                irc_rootmsg(irc, "%s", s);
                g_free(s);
        } else {
                irc_rootmsg(irc, "Error opening helpfile.");
        }
}

static void cmd_account(irc_t *irc, char **cmd);
static void bitlbee_whatsnew(irc_t *irc);

static void cmd_identify(irc_t *irc, char **cmd)
{
        storage_status_t status;
        gboolean load = TRUE;
        char *password = cmd[1];

        if (irc->status & USTATUS_IDENTIFIED) {
                irc_rootmsg(irc, "You're already logged in.");
                return;
        }

        if (cmd[1] == NULL) {
        } else if (strncmp(cmd[1], "-no", 3) == 0) {
                load = FALSE;
                password = cmd[2];
                if (password == NULL) {
                        irc->status |= OPER_HACK_IDENTIFY_NOLOAD;
                }
        } else if (strncmp(cmd[1], "-force", 6) == 0) {
                password = cmd[2];
                if (password == NULL) {
                        irc->status |= OPER_HACK_IDENTIFY_FORCE;
                }
        } else if (irc->b->accounts != NULL) {
                irc_rootmsg(irc,
                            "You're trying to identify yourself, but already have "
                            "at least one IM account set up. "
                            "Use \x02identify -noload\x02 or \x02identify -force\x02 "
                            "instead (see \x02help identify\x02).");
                return;
        }

        if (password == NULL) {
                irc_rootmsg(irc, "About to identify, use /OPER to enter the password");
                irc->status |= OPER_HACK_IDENTIFY;
                return;
        }

        if (load) {
                status = storage_load(irc, password);
        } else {
                status = storage_check_pass(irc->user->nick, password);
        }

        switch (status) {
        case STORAGE_INVALID_PASSWORD:
                irc_rootmsg(irc, "Incorrect password");
                break;
        case STORAGE_NO_SUCH_USER:
                irc_rootmsg(irc, "The nick is (probably) not registered");
                break;
        case STORAGE_OK:
                irc_rootmsg(irc, "Password accepted%s",
                            load ? ", settings and accounts loaded" : "");
                irc_setpass(irc, password);
                irc->status |= USTATUS_IDENTIFIED;
                irc_umode_set(irc, "+R", 1);

                if (irc->caps & CAP_SASL) {
                        irc_user_t *iu = irc->user;
                        irc_send_num(irc, 900, "%s!%s@%s %s :You are now logged in as %s",
                                iu->nick, iu->user, iu->host, iu->nick, iu->nick);
                }

                bitlbee_whatsnew(irc);

                /* The following code is a bit hairy now. With takeover
                   support, we shouldn't immediately auto_connect in case
                   we're going to offer taking over an existing session.
                   Do it in 200ms since that should give the parent process
                   enough time to come back to us. */
                if (load) {
                        irc_channel_auto_joins(irc, NULL);
                        if (!set_getbool(&irc->default_channel->set, "auto_join")) {
                                irc_channel_del_user(irc->default_channel, irc->user,
                                                     IRC_CDU_PART, "auto_join disabled "
                                                     "for this channel.");
                        }
                        if (set_getbool(&irc->b->set, "auto_connect")) {
                                irc->login_source_id = b_timeout_add(200,
                                                                     cmd_identify_finish, irc);
                        }
                }

                /* If ipc_child_identify() returns FALSE, it means we're
                   already sure that there's no takeover target (only
                   possible in 1-process daemon mode). Start auto_connect
                   immediately. */
                if (!ipc_child_identify(irc) && load) {
                        cmd_identify_finish(irc, 0, 0);
                }

                break;
        case STORAGE_OTHER_ERROR:
        default:
                irc_rootmsg(irc, "Unknown error while loading configuration");
                break;
        }
}

gboolean cmd_identify_finish(gpointer data, gint fd, b_input_condition cond)
{
        char *account_on[] = { "account", "on", NULL };
        irc_t *irc = data;

        if (set_getbool(&irc->b->set, "auto_connect")) {
                cmd_account(irc, account_on);
        }

        b_event_remove(irc->login_source_id);
        irc->login_source_id = -1;
        return FALSE;
}

static void cmd_register(irc_t *irc, char **cmd)
{
        char s[16];

        if (global.conf->authmode == AUTHMODE_REGISTERED) {
                irc_rootmsg(irc, "This server does not allow registering new accounts");
                return;
        }

        if (cmd[1] == NULL) {
                irc_rootmsg(irc, "About to register, use /OPER to enter the password");
                irc->status |= OPER_HACK_REGISTER;
                return;
        }

        switch (storage_save(irc, cmd[1], FALSE)) {
        case STORAGE_ALREADY_EXISTS:
                irc_rootmsg(irc, "Nick is already registered");
                break;

        case STORAGE_OK:
                irc_rootmsg(irc, "Account successfully created");
                irc_setpass(irc, cmd[1]);
                irc->status |= USTATUS_IDENTIFIED;
                irc_umode_set(irc, "+R", 1);

                if (irc->caps & CAP_SASL) {
                        irc_user_t *iu = irc->user;
                        irc_send_num(irc, 900, "%s!%s@%s %s :You are now logged in as %s",
                                iu->nick, iu->user, iu->host, iu->nick, iu->nick);
                }

                /* Set this var now, or anyone who logs in to his/her
                   newly created account for the first time gets the
                   whatsnew story. */
                g_snprintf(s, sizeof(s), "%d", BITLBEE_VERSION_CODE);
                set_setstr(&irc->b->set, "last_version", s);
                break;

        default:
                irc_rootmsg(irc, "Error registering");
                break;
        }
}

static void cmd_drop(irc_t *irc, char **cmd)
{
        storage_status_t status;

        status = storage_remove(irc->user->nick, cmd[1]);
        switch (status) {
        case STORAGE_NO_SUCH_USER:
                irc_rootmsg(irc, "That account does not exist");
                break;
        case STORAGE_INVALID_PASSWORD:
                irc_rootmsg(irc, "Password invalid");
                break;
        case STORAGE_OK:
                irc_setpass(irc, NULL);
                irc->status &= ~USTATUS_IDENTIFIED;
                irc_umode_set(irc, "-R", 1);
                irc_rootmsg(irc, "Account `%s' removed", irc->user->nick);
                break;
        default:
                irc_rootmsg(irc, "Error: `%d'", status);
                break;
        }
}

static void cmd_save(irc_t *irc, char **cmd)
{
        if ((irc->status & USTATUS_IDENTIFIED) == 0) {
                irc_rootmsg(irc, "Please create an account first (see \x02help register\x02)");
        } else if (storage_save(irc, NULL, TRUE) == STORAGE_OK) {
                irc_rootmsg(irc, "Configuration saved");
        } else {
                irc_rootmsg(irc, "Configuration could not be saved!");
        }
}

static void cmd_showset(irc_t *irc, set_t **head, char *key)
{
        set_t *set;
        char *val;

        if ((val = set_getstr(head, key))) {
                irc_rootmsg(irc, "%s = `%s'", key, val);
        } else if (!(set = set_find(head, key))) {
                irc_rootmsg(irc, "Setting `%s' does not exist.", key);
                if (*head == irc->b->set) {
                        irc_rootmsg(irc, "It might be an account or channel setting. "
                                    "See \x02help account set\x02 and \x02help channel set\x02.");
                }
        } else if (set->flags & SET_PASSWORD) {
                irc_rootmsg(irc, "%s = `********' (hidden)", key);
        } else {
                irc_rootmsg(irc, "%s is empty", key);
        }
}

typedef set_t** (*cmd_set_findhead)(irc_t*, char*);
typedef int (*cmd_set_checkflags)(irc_t*, set_t *set);

static int cmd_set_real(irc_t *irc, char **cmd, set_t **head, cmd_set_checkflags checkflags)
{
        char *set_name = NULL, *value = NULL;
        gboolean del = FALSE;

        if (cmd[1] && g_strncasecmp(cmd[1], "-del", 4) == 0) {
                MIN_ARGS(2, 0);
                set_name = cmd[2];
                del = TRUE;
        } else {
                set_name = cmd[1];
                value = cmd[2];
        }

        if (set_name && (value || del)) {
                set_t *s = set_find(head, set_name);
                int st;

                if (s && checkflags && checkflags(irc, s) == 0) {
                        return 0;
                }

                if (del) {
                        st = set_reset(head, set_name);
                } else {
                        st = set_setstr(head, set_name, value);
                }

                if (set_getstr(head, set_name) == NULL &&
                    set_find(head, set_name)) {
                        /* This happens when changing the passwd, for example.
                           Showing these msgs instead gives slightly clearer
                           feedback. */
                        if (st) {
                                irc_rootmsg(irc, "Setting changed successfully");
                        } else {
                                irc_rootmsg(irc, "Failed to change setting");
                        }
                } else {
                        cmd_showset(irc, head, set_name);
                }
        } else if (set_name) {
                cmd_showset(irc, head, set_name);
        } else {
                set_t *s = *head;
                while (s) {
                        if (set_isvisible(s)) {
                                cmd_showset(irc, &s, s->key);
                        }
                        s = s->next;
                }
        }

        return 1;
}

static int cmd_account_set_checkflags(irc_t *irc, set_t *s)
{
        account_t *a = s->data;

        if (a->ic && s && s->flags & ACC_SET_OFFLINE_ONLY) {
                irc_rootmsg(irc, "This setting can only be changed when the account is %s-line", "off");
                return 0;
        } else if (!a->ic && s && s->flags & ACC_SET_ONLINE_ONLY) {
                irc_rootmsg(irc, "This setting can only be changed when the account is %s-line", "on");
                return 0;
        }

        return 1;
}

static void cmd_account(irc_t *irc, char **cmd)
{
        account_t *a;
        int len;

        if (global.conf->authmode == AUTHMODE_REGISTERED && !(irc->status & USTATUS_IDENTIFIED)) {
                irc_rootmsg(irc, "This server only accepts registered users");
                return;
        }

        len = strlen(cmd[1]);

        if (len >= 1 && g_strncasecmp(cmd[1], "add", len) == 0) {
                struct prpl *prpl;

                MIN_ARGS(3);

                if (cmd[4] == NULL) {
                        for (a = irc->b->accounts; a; a = a->next) {
                                if (strcmp(a->pass, PASSWORD_PENDING) == 0) {
                                        irc_rootmsg(irc, "Enter password for account %s "
                                                    "first (use /OPER)", a->tag);
                                        return;
                                }
                        }

                        irc->status |= OPER_HACK_ACCOUNT_PASSWORD;
                }

                prpl = find_protocol(cmd[2]);

                if (prpl == NULL) {
                        if (is_protocol_disabled(cmd[2])) {
                                irc_rootmsg(irc, "Protocol disabled in global config");
                        } else {
                                irc_rootmsg(irc, "Unknown protocol");
                        }
                        return;
                }

                for (a = irc->b->accounts; a; a = a->next) {
                        if (a->prpl == prpl && prpl->handle_cmp(a->user, cmd[3]) == 0) {
                                irc_rootmsg(irc, "Warning: You already have an account with "
                                            "protocol `%s' and username `%s'. Are you accidentally "
                                            "trying to add it twice?", prpl->name, cmd[3]);
                        }
                }

                a = account_add(irc->b, prpl, cmd[3], cmd[4] ? cmd[4] : PASSWORD_PENDING);
                if (cmd[5]) {
                        irc_rootmsg(irc, "Warning: Passing a servername/other flags to `account add' "
                                    "is now deprecated. Use `account set' instead.");
                        set_setstr(&a->set, "server", cmd[5]);
                }

                irc_rootmsg(irc, "Account successfully added with tag %s", a->tag);

                if (cmd[4] == NULL) {
                        set_t *oauth = set_find(&a->set, "oauth");
                        if (oauth && bool2int(set_value(oauth))) {
                                *a->pass = '\0';
                                irc_rootmsg(irc, "No need to enter a password for this "
                                            "account since it's using OAuth");
                        } else {
                                irc_rootmsg(irc, "You can now use the /OPER command to "
                                            "enter the password");
                                if (oauth) {
                                        irc_rootmsg(irc, "Alternatively, enable OAuth if "
                                                    "the account supports it: account %s "
                                                    "set oauth on", a->tag);
                                }
                        }
                }

                return;
        } else if (len >= 1 && g_strncasecmp(cmd[1], "list", len) == 0) {
                int i = 0;

                if (strchr(irc->umode, 'b')) {
                        irc_rootmsg(irc, "Account list:");
                }

                for (a = irc->b->accounts; a; a = a->next) {
                        char *con;

                        if (a->ic && (a->ic->flags & OPT_LOGGED_IN)) {
                                con = " (connected)";
                        } else if (a->ic) {
                                con = " (connecting)";
                        } else if (a->reconnect) {
                                con = " (awaiting reconnect)";
                        } else {
                                con = "";
                        }

                        irc_rootmsg(irc, "%2d (%s): %s, %s%s", i, a->tag, a->prpl->name, a->user, con);

                        i++;
                }
                irc_rootmsg(irc, "End of account list");

                return;
        } else if (cmd[2]) {
                /* Try the following two only if cmd[2] == NULL */
        } else if (len >= 2 && g_strncasecmp(cmd[1], "on", len) == 0) {
                if (irc->b->accounts) {
                        irc_rootmsg(irc, "Trying to get all accounts connected...");

                        for (a = irc->b->accounts; a; a = a->next) {
                                if (!a->ic && a->auto_connect) {
                                        if (strcmp(a->pass, PASSWORD_PENDING) == 0) {
                                                irc_rootmsg(irc, "Enter password for account %s "
                                                            "first (use /OPER)", a->tag);
                                        } else {
                                                account_on(irc->b, a);
                                        }
                                }
                        }
                } else {
                        irc_rootmsg(irc, "No accounts known. Use `account add' to add one.");
                }

                return;
        } else if (len >= 2 && g_strncasecmp(cmd[1], "off", len) == 0) {
                irc_rootmsg(irc, "Deactivating all active (re)connections...");

                for (a = irc->b->accounts; a; a = a->next) {
                        if (a->ic) {
                                account_off(irc->b, a);
                        } else if (a->reconnect) {
                                cancel_auto_reconnect(a);
                        }
                }

                return;
        }

        MIN_ARGS(2);
        len = strlen(cmd[2]);

        /* At least right now, don't accept on/off/set/del as account IDs even
           if they're a proper match, since people not familiar with the new
           syntax yet may get a confusing/nasty surprise. */
        if (g_strcasecmp(cmd[1], "on") == 0 ||
            g_strcasecmp(cmd[1], "off") == 0 ||
            g_strcasecmp(cmd[1], "set") == 0 ||
            g_strcasecmp(cmd[1], "del") == 0 ||
            (a = account_get(irc->b, cmd[1])) == NULL) {
                irc_rootmsg(irc, "Could not find account `%s'.", cmd[1]);

                return;
        }

        if (len >= 1 && g_strncasecmp(cmd[2], "del", len) == 0) {
                if (a->ic) {
                        irc_rootmsg(irc, "Account is still logged in, can't delete");
                } else {
                        account_del(irc->b, a);
                        irc_rootmsg(irc, "Account deleted");
                }
        } else if (len >= 2 && g_strncasecmp(cmd[2], "on", len) == 0) {
                if (a->ic) {
                        irc_rootmsg(irc, "Account already online");
                } else if (strcmp(a->pass, PASSWORD_PENDING) == 0) {
                        irc_rootmsg(irc, "Enter password for account %s "
                                    "first (use /OPER)", a->tag);
                } else {
                        account_on(irc->b, a);
                }
        } else if (len >= 2 && g_strncasecmp(cmd[2], "off", len) == 0) {
                if (a->ic) {
                        account_off(irc->b, a);
                } else if (a->reconnect) {
                        cancel_auto_reconnect(a);
                        irc_rootmsg(irc, "Reconnect cancelled");
                } else {
                        irc_rootmsg(irc, "Account already offline");
                }
        } else if (len >= 1 && g_strncasecmp(cmd[2], "set", len) == 0) {
                cmd_set_real(irc, cmd + 2, &a->set, cmd_account_set_checkflags);
        } else {
                irc_rootmsg(irc,
                            "Unknown command: %s [...] %s. Please use \x02help commands\x02 to get a list of available commands.", "account",
                            cmd[2]);
        }
}

static void cmd_channel(irc_t *irc, char **cmd)
{
        irc_channel_t *ic;
        int len;

        len = strlen(cmd[1]);

        if (len >= 1 && g_strncasecmp(cmd[1], "list", len) == 0) {
                GSList *l;
                int i = 0;

                if (strchr(irc->umode, 'b')) {
                        irc_rootmsg(irc, "Channel list:");
                }

                for (l = irc->channels; l; l = l->next) {
                        irc_channel_t *ic = l->data;

                        irc_rootmsg(irc, "%2d. %s, %s channel%s", i, ic->name,
                                    set_getstr(&ic->set, "type"),
                                    ic->flags & IRC_CHANNEL_JOINED ? " (joined)" : "");

                        i++;
                }
                irc_rootmsg(irc, "End of channel list");

                return;
        }

        if ((ic = irc_channel_get(irc, cmd[1])) == NULL) {
                /* If this doesn't match any channel, maybe this is the short
                   syntax (only works when used inside a channel). */
                if ((ic = irc->root->last_channel) &&
                    (len = strlen(cmd[1])) &&
                    g_strncasecmp(cmd[1], "set", len) == 0) {
                        cmd_set_real(irc, cmd + 1, &ic->set, NULL);
                } else {
                        irc_rootmsg(irc, "Could not find channel `%s'", cmd[1]);
                }

                return;
        }

        MIN_ARGS(2);
        len = strlen(cmd[2]);

        if (len >= 1 && g_strncasecmp(cmd[2], "set", len) == 0) {
                cmd_set_real(irc, cmd + 2, &ic->set, NULL);
        } else if (len >= 1 && g_strncasecmp(cmd[2], "del", len) == 0) {
                if (!(ic->flags & IRC_CHANNEL_JOINED) &&
                    ic != ic->irc->default_channel) {
                        irc_rootmsg(irc, "Channel %s deleted.", ic->name);
                        irc_channel_free(ic);
                } else {
                        irc_rootmsg(irc, "Couldn't remove channel (main channel %s or "
                                    "channels you're still in cannot be deleted).",
                                    irc->default_channel->name);
                }
        } else {
                irc_rootmsg(irc,
                            "Unknown command: %s [...] %s. Please use \x02help commands\x02 to get a list of available commands.", "channel",
                            cmd[1]);
        }
}

static void cmd_add(irc_t *irc, char **cmd)
{
        account_t *a;
        int add_on_server = 1;
        char *handle = NULL, *s;

        if (g_strcasecmp(cmd[1], "-tmp") == 0) {
                MIN_ARGS(3);
                add_on_server = 0;
                cmd++;
        }

        if (!(a = account_get(irc->b, cmd[1]))) {
                irc_rootmsg(irc, "Invalid account");
                return;
        } else if (!(a->ic && (a->ic->flags & OPT_LOGGED_IN))) {
                irc_rootmsg(irc, "That account is not on-line");
                return;
        }

        if (cmd[3]) {
                if (!nick_ok(irc, cmd[3])) {
                        irc_rootmsg(irc, "The requested nick `%s' is invalid", cmd[3]);
                        return;
                } else if (irc_user_by_name(irc, cmd[3])) {
                        irc_rootmsg(irc, "The requested nick `%s' already exists", cmd[3]);
                        return;
                } else {
                        nick_set_raw(a, cmd[2], cmd[3]);
                }
        }

        if ((a->flags & ACC_FLAG_HANDLE_DOMAINS) && cmd[2][0] != '_' &&
            (!(s = strchr(cmd[2], '@')) || s[1] == '\0')) {
                /* If there's no @ or it's the last char, append the user's
                   domain name now. Exclude handles starting with a _ so
                   adding _xmlconsole will keep working. */
                if (s) {
                        *s = '\0';
                }
                if ((s = strchr(a->user, '@'))) {
                        cmd[2] = handle = g_strconcat(cmd[2], s, NULL);
                }
        }

        if (add_on_server) {
                irc_channel_t *ic;
                char *s, *group = NULL;;

                if ((ic = irc->root->last_channel) &&
                    (s = set_getstr(&ic->set, "fill_by")) &&
                    strcmp(s, "group") == 0 &&
                    (group = set_getstr(&ic->set, "group"))) {
                        irc_rootmsg(irc, "Adding `%s' to contact list (group %s)",
                                    cmd[2], group);
                } else {
                        irc_rootmsg(irc, "Adding `%s' to contact list", cmd[2]);
                }

                a->prpl->add_buddy(a->ic, cmd[2], group);
        } else {
                bee_user_t *bu;
                irc_user_t *iu;

                /* Only for add -tmp. For regular adds, this callback will
                   be called once the IM server confirms. */
                if ((bu = bee_user_new(irc->b, a->ic, cmd[2], BEE_USER_LOCAL)) &&
                    (iu = bu->ui_data)) {
                        irc_rootmsg(irc, "Temporarily assigned nickname `%s' "
                                    "to contact `%s'", iu->nick, cmd[2]);
                }
        }

        g_free(handle);
}

static void cmd_remove(irc_t *irc, char **cmd)
{
        irc_user_t *iu;
        bee_user_t *bu;
        char *s;

        if (!(iu = irc_user_by_name(irc, cmd[1])) || !(bu = iu->bu)) {
                irc_rootmsg(irc, "Buddy `%s' not found", cmd[1]);
                return;
        }
        s = g_strdup(bu->handle);

        bu->ic->acc->prpl->remove_buddy(bu->ic, bu->handle, NULL);
        nick_del(bu);
        if (g_slist_find(irc->users, iu)) {
                bee_user_free(irc->b, bu);
        }

        irc_rootmsg(irc, "Buddy `%s' (nick %s) removed from contact list", s, cmd[1]);
        g_free(s);

        return;
}

static void cmd_info(irc_t *irc, char **cmd)
{
        struct im_connection *ic;
        account_t *a;

        if (!cmd[2]) {
                irc_user_t *iu = irc_user_by_name(irc, cmd[1]);
                if (!iu || !iu->bu) {
                        irc_rootmsg(irc, "Nick `%s' does not exist", cmd[1]);
                        return;
                }
                ic = iu->bu->ic;
                cmd[2] = iu->bu->handle;
        } else if (!(a = account_get(irc->b, cmd[1]))) {
                irc_rootmsg(irc, "Invalid account");
                return;
        } else if (!((ic = a->ic) && (a->ic->flags & OPT_LOGGED_IN))) {
                irc_rootmsg(irc, "That account is not on-line");
                return;
        }

        if (!ic->acc->prpl->get_info) {
                irc_rootmsg(irc, "Command `%s' not supported by this protocol", cmd[0]);
        } else {
                ic->acc->prpl->get_info(ic, cmd[2]);
        }
}

static void cmd_rename(irc_t *irc, char **cmd)
{
        irc_user_t *iu, *old;
        gboolean del = g_strcasecmp(cmd[1], "-del") == 0;

        iu = irc_user_by_name(irc, cmd[del ? 2 : 1]);

        if (iu == NULL) {
                irc_rootmsg(irc, "Nick `%s' does not exist", cmd[1]);
        } else if (del) {
                if (iu->bu) {
                        bee_irc_user_nick_reset(iu);
                }
                irc_rootmsg(irc, "Nickname reset to `%s'", iu->nick);
        } else if (iu == irc->user) {
                irc_rootmsg(irc, "Use /nick to change your own nickname");
        } else if (!nick_ok(irc, cmd[2])) {
                irc_rootmsg(irc, "Nick `%s' is invalid", cmd[2]);
        } else if ((old = irc_user_by_name(irc, cmd[2])) && old != iu) {
                irc_rootmsg(irc, "Nick `%s' already exists", cmd[2]);
        } else {
                if (!irc_user_set_nick(iu, cmd[2])) {
                        irc_rootmsg(irc, "Error while changing nick");
                        return;
                }

                if (iu == irc->root) {
                        /* If we're called internally (user did "set root_nick"),
                           let's not go O(INF). :-) */
                        if (strcmp(cmd[0], "set_rename") != 0) {
                                set_setstr(&irc->b->set, "root_nick", cmd[2]);
                        }
                } else if (iu->bu) {
                        nick_set(iu->bu, cmd[2]);
                }

                irc_rootmsg(irc, "Nick successfully changed");
        }
}

char *set_eval_root_nick(set_t *set, char *new_nick)
{
        irc_t *irc = set->data;

        if (strcmp(irc->root->nick, new_nick) != 0) {
                char *cmd[] = { "set_rename", irc->root->nick, new_nick, NULL };

                cmd_rename(irc, cmd);
        }

        return strcmp(irc->root->nick, new_nick) == 0 ? new_nick : SET_INVALID;
}

static void cmd_block(irc_t *irc, char **cmd)
{
        struct im_connection *ic;
        account_t *a;

        if (!cmd[2] && (a = account_get(irc->b, cmd[1])) && a->ic) {
                char *format;
                GSList *l;

                if (strchr(irc->umode, 'b') != NULL) {
                        format = "%s\t%s";
                } else {
                        format = "%-32.32s  %-16.16s";
                }

                irc_rootmsg(irc, format, "Handle", "Nickname");
                for (l = a->ic->deny; l; l = l->next) {
                        bee_user_t *bu = bee_user_by_handle(irc->b, a->ic, l->data);
                        irc_user_t *iu = bu ? bu->ui_data : NULL;
                        irc_rootmsg(irc, format, l->data, iu ? iu->nick : "(none)");
                }
                irc_rootmsg(irc, "End of list.");

                return;
        } else if (!cmd[2]) {
                irc_user_t *iu = irc_user_by_name(irc, cmd[1]);
                if (!iu || !iu->bu) {
                        irc_rootmsg(irc, "Nick `%s' does not exist", cmd[1]);
                        return;
                }
                ic = iu->bu->ic;
                cmd[2] = iu->bu->handle;
        } else if (!(a = account_get(irc->b, cmd[1]))) {
                irc_rootmsg(irc, "Invalid account");
                return;
        } else if (!((ic = a->ic) && (a->ic->flags & OPT_LOGGED_IN))) {
                irc_rootmsg(irc, "That account is not on-line");
                return;
        }

        if (!ic->acc->prpl->add_deny || !ic->acc->prpl->rem_permit) {
                irc_rootmsg(irc, "Command `%s' not supported by this protocol", cmd[0]);
        } else {
                imc_rem_allow(ic, cmd[2]);
                imc_add_block(ic, cmd[2]);
                irc_rootmsg(irc, "Buddy `%s' moved from allow- to block-list", cmd[2]);
        }
}

static void cmd_allow(irc_t *irc, char **cmd)
{
        struct im_connection *ic;
        account_t *a;

        if (!cmd[2] && (a = account_get(irc->b, cmd[1])) && a->ic) {
                char *format;
                GSList *l;

                if (strchr(irc->umode, 'b') != NULL) {
                        format = "%s\t%s";
                } else {
                        format = "%-32.32s  %-16.16s";
                }

                irc_rootmsg(irc, format, "Handle", "Nickname");
                for (l = a->ic->permit; l; l = l->next) {
                        bee_user_t *bu = bee_user_by_handle(irc->b, a->ic, l->data);
                        irc_user_t *iu = bu ? bu->ui_data : NULL;
                        irc_rootmsg(irc, format, l->data, iu ? iu->nick : "(none)");
                }
                irc_rootmsg(irc, "End of list.");

                return;
        } else if (!cmd[2]) {
                irc_user_t *iu = irc_user_by_name(irc, cmd[1]);
                if (!iu || !iu->bu) {
                        irc_rootmsg(irc, "Nick `%s' does not exist", cmd[1]);
                        return;
                }
                ic = iu->bu->ic;
                cmd[2] = iu->bu->handle;
        } else if (!(a = account_get(irc->b, cmd[1]))) {
                irc_rootmsg(irc, "Invalid account");
                return;
        } else if (!((ic = a->ic) && (a->ic->flags & OPT_LOGGED_IN))) {
                irc_rootmsg(irc, "That account is not on-line");
                return;
        }

        if (!ic->acc->prpl->rem_deny || !ic->acc->prpl->add_permit) {
                irc_rootmsg(irc, "Command `%s' not supported by this protocol", cmd[0]);
        } else {
                imc_rem_block(ic, cmd[2]);
                imc_add_allow(ic, cmd[2]);

                irc_rootmsg(irc, "Buddy `%s' moved from block- to allow-list", cmd[2]);
        }
}

static void cmd_yesno(irc_t *irc, char **cmd)
{
        query_t *q = NULL;
        int numq = 0;

        if (irc->queries == NULL) {
                /* Alright, alright, let's add a tiny easter egg here. */
                static irc_t *last_irc = NULL;
                static time_t last_time = 0;
                static int times = 0;
                static const char *msg[] = {
                        "Oh yeah, that's right.",
                        "Alright, alright. Now go back to work.",
                        "Buuuuuuuuuuuuuuuurp... Excuse me!",
                        "Yes?",
                        "No?",
                };

                if (last_irc == irc && time(NULL) - last_time < 15) {
                        if ((++times >= 3)) {
                                irc_rootmsg(irc, "%s", msg[rand() % (sizeof(msg) / sizeof(char*))]);
                                last_irc = NULL;
                                times = 0;
                                return;
                        }
                } else {
                        last_time = time(NULL);
                        last_irc = irc;
                        times = 0;
                }

                irc_rootmsg(irc, "Did I ask you something?");
                return;
        }

        /* If there's an argument, the user seems to want to answer another question than the
           first/last (depending on the query_order setting) one. */
        if (cmd[1]) {
                if (sscanf(cmd[1], "%d", &numq) != 1) {
                        irc_rootmsg(irc, "Invalid query number");
                        return;
                }

                for (q = irc->queries; q; q = q->next, numq--) {
                        if (numq == 0) {
                                break;
                        }
                }

                if (!q) {
                        irc_rootmsg(irc, "Uhm, I never asked you something like that...");
                        return;
                }
        }

        if (g_strcasecmp(cmd[0], "yes") == 0) {
                query_answer(irc, q, 1);
        } else if (g_strcasecmp(cmd[0], "no") == 0) {
                query_answer(irc, q, 0);
        }
}

static void cmd_set(irc_t *irc, char **cmd)
{
        cmd_set_real(irc, cmd, &irc->b->set, NULL);
}

static void cmd_blist(irc_t *irc, char **cmd)
{
        int online = 0, away = 0, offline = 0, ismatch = 0;
        GSList *l;
        GRegex *regex = NULL;
        GError *error = NULL;
        char s[256];
        char *format;
        int n_online = 0, n_away = 0, n_offline = 0;

        if (cmd[1] && g_strcasecmp(cmd[1], "all") == 0) {
                online = offline = away = 1;
        } else if (cmd[1] && g_strcasecmp(cmd[1], "offline") == 0) {
                offline = 1;
        } else if (cmd[1] && g_strcasecmp(cmd[1], "away") == 0) {
                away = 1;
        } else if (cmd[1] && g_strcasecmp(cmd[1], "online") == 0) {
                online = 1;
        } else {
                online = away = 1;
        }

        if (cmd[2]) {
                regex = g_regex_new(cmd[2], G_REGEX_CASELESS, 0, &error);
        }

        if (error) {
                irc_rootmsg(irc, error->message);
                g_error_free(error);
        }

        if (strchr(irc->umode, 'b') != NULL) {
                format = "%s\t%s\t%s";
        } else {
                format = "%-16.16s  %-40.40s  %s";
        }

        irc_rootmsg(irc, format, "Nick", "Handle/Account", "Status");

        if (irc->root->last_channel &&
            strcmp(set_getstr(&irc->root->last_channel->set, "type"), "control") != 0) {
                irc->root->last_channel = NULL;
        }

        for (l = irc->users; l; l = l->next) {
                irc_user_t *iu = l->data;
                bee_user_t *bu = iu->bu;

                if (!regex || g_regex_match(regex, iu->nick, 0, NULL)) {
                        ismatch = 1;
                } else {
                        ismatch = 0;
                }

                if (!bu || (irc->root->last_channel && !irc_channel_wants_user(irc->root->last_channel, iu))) {
                        continue;
                }

                if ((bu->flags & (BEE_USER_ONLINE | BEE_USER_AWAY)) == BEE_USER_ONLINE) {
                        if (ismatch == 1 && online == 1) {
                                char st[256] = "Online";

                                if (bu->status_msg) {
                                        g_snprintf(st, sizeof(st) - 1, "Online (%s)", bu->status_msg);
                                }

                                g_snprintf(s, sizeof(s) - 1, "%s %s", bu->handle, bu->ic->acc->tag);
                                irc_rootmsg(irc, format, iu->nick, s, st);
                        }

                        n_online++;
                }

                if ((bu->flags & BEE_USER_ONLINE) && (bu->flags & BEE_USER_AWAY)) {
                        if (ismatch == 1 && away == 1) {
                                g_snprintf(s, sizeof(s) - 1, "%s %s", bu->handle, bu->ic->acc->tag);
                                irc_rootmsg(irc, format, iu->nick, s, irc_user_get_away(iu));
                        }
                        n_away++;
                }

                if (!(bu->flags & BEE_USER_ONLINE)) {
                        if (ismatch == 1 && offline == 1) {
                                g_snprintf(s, sizeof(s) - 1, "%s %s", bu->handle, bu->ic->acc->tag);
                                irc_rootmsg(irc, format, iu->nick, s, "Offline");
                        }
                        n_offline++;
                }
        }

        irc_rootmsg(irc, "%d buddies (%d available, %d away, %d offline)", n_online + n_away + n_offline, n_online,
                    n_away, n_offline);

        if (regex) {
                g_regex_unref(regex);
        }
}

static void cmd_qlist(irc_t *irc, char **cmd)
{
        query_t *q = irc->queries;
        int num;

        if (!q) {
                irc_rootmsg(irc, "There are no pending questions.");
                return;
        }

        irc_rootmsg(irc, "Pending queries:");

        for (num = 0; q; q = q->next, num++) {
                if (q->ic) { /* Not necessary yet, but it might come later */
                        irc_rootmsg(irc, "%d, %s: %s", num, q->ic->acc->tag, q->question);
                } else {
                        irc_rootmsg(irc, "%d, BitlBee: %s", num, q->question);
                }
        }
}

static void cmd_chat(irc_t *irc, char **cmd)
{
        account_t *acc;

        if (g_strcasecmp(cmd[1], "add") == 0) {
                char *channel, *s;
                struct irc_channel *ic;

                MIN_ARGS(3);

                if (!(acc = account_get(irc->b, cmd[2]))) {
                        irc_rootmsg(irc, "Invalid account");
                        return;
                } else if (!acc->prpl->chat_join) {
                        irc_rootmsg(irc, "Named chatrooms not supported on that account.");
                        return;
                }

                if (cmd[4] == NULL) {
                        channel = g_strdup(cmd[3]);
                        if ((s = strchr(channel, '@'))) {
                                *s = 0;
                        }
                } else {
                        channel = g_strdup(cmd[4]);
                }

                if (strchr(CTYPES, channel[0]) == NULL) {
                        s = g_strdup_printf("#%s", channel);
                        g_free(channel);
                        channel = s;

                        irc_channel_name_strip(channel);
                }

                if ((ic = irc_channel_new(irc, channel)) &&
                    set_setstr(&ic->set, "type", "chat") &&
                    set_setstr(&ic->set, "chat_type", "room") &&
                    set_setstr(&ic->set, "account", cmd[2]) &&
                    set_setstr(&ic->set, "room", cmd[3])) {
                        irc_rootmsg(irc, "Chatroom successfully added.");
                } else {
                        if (ic) {
                                irc_channel_free(ic);
                        }

                        irc_rootmsg(irc, "Could not add chatroom.");
                }
                g_free(channel);
        } else if (g_strcasecmp(cmd[1], "with") == 0) {
                irc_user_t *iu;

                MIN_ARGS(2);

                if ((iu = irc_user_by_name(irc, cmd[2])) &&
                    iu->bu && iu->bu->ic->acc->prpl->chat_with) {
                        if (!iu->bu->ic->acc->prpl->chat_with(iu->bu->ic, iu->bu->handle)) {
                                irc_rootmsg(irc, "(Possible) failure while trying to open "
                                            "a groupchat with %s.", iu->nick);
                        }
                } else {
                        irc_rootmsg(irc, "Can't open a groupchat with %s.", cmd[2]);
                }
        } else if (g_strcasecmp(cmd[1], "list") == 0 ||
                   g_strcasecmp(cmd[1], "set") == 0 ||
                   g_strcasecmp(cmd[1], "del") == 0) {
                irc_rootmsg(irc,
                            "Warning: The \002chat\002 command was mostly replaced with the \002channel\002 command.");
                cmd_channel(irc, cmd);
        } else {
                irc_rootmsg(irc,
                            "Unknown command: %s %s. Please use \x02help commands\x02 to get a list of available commands.", "chat",
                            cmd[1]);
        }
}

static void cmd_group(irc_t *irc, char **cmd)
{
        GSList *l;
        int len;

        len = strlen(cmd[1]);
        if (g_strncasecmp(cmd[1], "list", len) == 0) {
                int n = 0;

                if (strchr(irc->umode, 'b')) {
                        irc_rootmsg(irc, "Group list:");
                }

                for (l = irc->b->groups; l; l = l->next) {
                        bee_group_t *bg = l->data;
                        irc_rootmsg(irc, "%d. %s", n++, bg->name);
                }
                irc_rootmsg(irc, "End of group list");
        } else if (g_strncasecmp(cmd[1], "info", len) == 0) {
                bee_group_t *bg;
                int n = 0;

                MIN_ARGS(2);
                bg = bee_group_by_name(irc->b, cmd[2], FALSE);

                if (bg) {
                        if (strchr(irc->umode, 'b')) {
                                irc_rootmsg(irc, "Members of %s:", cmd[2]);
                        }
                        for (l = irc->b->users; l; l = l->next) {
                                bee_user_t *bu = l->data;
                                if (bu->group == bg) {
                                        irc_rootmsg(irc, "%d. %s", n++, bu->nick ? : bu->handle);
                                }
                        }
                        irc_rootmsg(irc, "End of member list");
                } else {
                        irc_rootmsg(irc,
                                    "Unknown group: %s. Please use \x02group list\x02 to get a list of available groups.",
                                    cmd[2]);
                }
        } else {
                irc_rootmsg(irc,
                            "Unknown command: %s %s. Please use \x02help commands\x02 to get a list of available commands.", "group",
                            cmd[1]);
        }
}

static void cmd_transfer(irc_t *irc, char **cmd)
{
        GSList *files = irc->file_transfers;
        GSList *next;

        enum { LIST, REJECT, CANCEL };
        int subcmd = LIST;
        int fid;

        if (!files) {
                irc_rootmsg(irc, "No pending transfers");
                return;
        }

        if (cmd[1] && (strcmp(cmd[1], "reject") == 0)) {
                subcmd = REJECT;
        } else if (cmd[1] && (strcmp(cmd[1], "cancel") == 0) &&
                   cmd[2] && (sscanf(cmd[2], "%d", &fid) == 1)) {
                subcmd = CANCEL;
        }

        for (; files; files = next) {
                next = files->next;
                file_transfer_t *file = files->data;

                switch (subcmd) {
                case LIST:
                        if (file->status == FT_STATUS_LISTENING) {
                                irc_rootmsg(irc,
                                            "Pending file(id %d): %s (Listening...)", file->local_id, file->file_name);
                        } else {
                                int kb_per_s = 0;
                                time_t diff = time(NULL) - file->started ? : 1;
                                if ((file->started > 0) && (file->bytes_transferred > 0)) {
                                        kb_per_s = file->bytes_transferred / 1024 / diff;
                                }

                                irc_rootmsg(irc,
                                            "Pending file(id %d): %s (%10zd/%zd kb, %d kb/s)", file->local_id,
                                            file->file_name,
                                            file->bytes_transferred / 1024, file->file_size / 1024, kb_per_s);
                        }
                        break;
                case REJECT:
                        if (file->status == FT_STATUS_LISTENING) {
                                irc_rootmsg(irc, "Rejecting file transfer for %s", file->file_name);
                                imcb_file_canceled(file->ic, file, "Denied by user");
                        }
                        break;
                case CANCEL:
                        if (file->local_id == fid) {
                                irc_rootmsg(irc, "Canceling file transfer for %s", file->file_name);
                                imcb_file_canceled(file->ic, file, "Canceled by user");
                        }
                        break;
                }
        }
}

static void cmd_nick(irc_t *irc, char **cmd)
{
        irc_rootmsg(irc, "This command is deprecated. Try: account %s set display_name", cmd[1]);
}

/* Maybe this should be a stand-alone command as well? */
static void bitlbee_whatsnew(irc_t *irc)
{
        int last = set_getint(&irc->b->set, "last_version");
        char s[16], *msg;

        if (last >= BITLBEE_VERSION_CODE) {
                return;
        }

        msg = help_get_whatsnew(&(global.help), last);

        if (msg) {
                irc_rootmsg(irc, "%s: This seems to be your first time using this "
                            "this version of BitlBee. Here's a list of new "
                            "features you may like to know about:\n\n%s\n",
                            irc->user->nick, msg);
        }

        g_free(msg);

        g_snprintf(s, sizeof(s), "%d", BITLBEE_VERSION_CODE);
        set_setstr(&irc->b->set, "last_version", s);
}

/* IMPORTANT: Keep this list sorted! The short command logic needs that. */
command_t root_commands[] = {
        { "account",        1, cmd_account,        0 },
        { "add",            2, cmd_add,            0 },
        { "allow",          1, cmd_allow,          0 },
        { "blist",          0, cmd_blist,          0 },
        { "block",          1, cmd_block,          0 },
        { "channel",        1, cmd_channel,        0 },
        { "chat",           1, cmd_chat,           0 },
        { "drop",           1, cmd_drop,           0 },
        { "ft",             0, cmd_transfer,       0 },
        { "group",          1, cmd_group,          0 },
        { "help",           0, cmd_help,           0 },
        { "identify",       0, cmd_identify,       0 },
        { "info",           1, cmd_info,           0 },
        { "nick",           1, cmd_nick,           0 },
        { "no",             0, cmd_yesno,          0 },
        { "qlist",          0, cmd_qlist,          0 },
        { "register",       0, cmd_register,       0 },
        { "remove",         1, cmd_remove,         0 },
        { "rename",         2, cmd_rename,         0 },
        { "save",           0, cmd_save,           0 },
        { "set",            0, cmd_set,            0 },
        { "transfer",       0, cmd_transfer,       0 },
        { "yes",            0, cmd_yesno,          0 },
        /* Not expecting too many plugins adding root commands so just make a
           dumb array with some empty entried at the end. */
        { NULL },
        { NULL },
        { NULL },
        { NULL },
        { NULL },
        { NULL },
        { NULL },
        { NULL },
        { NULL },
};
static const int num_root_commands = sizeof(root_commands) / sizeof(command_t);

gboolean root_command_add(const char *command, int params, void (*func)(irc_t *, char **args), int flags)
{
        int i;

        if (root_commands[num_root_commands - 2].command) {
                /* Planning fail! List is full. */
                return FALSE;
        }

        for (i = 0; root_commands[i].command; i++) {
                if (g_strcasecmp(root_commands[i].command, command) == 0) {
                        return FALSE;
                } else if (g_strcasecmp(root_commands[i].command, command) > 0) {
                        break;
                }
        }
        memmove(root_commands + i + 1, root_commands + i,
                sizeof(command_t) * (num_root_commands - i - 1));

        root_commands[i].command = g_strdup(command);
        root_commands[i].required_parameters = params;
        root_commands[i].execute = func;
        root_commands[i].flags = flags;

        return TRUE;
}