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/********************************************************************\
* BitlBee -- An IRC to other IM-networks gateway *
* *
* Copyright 2002-2012 Wilmer van der Gaast and others *
\********************************************************************/
/* IPC - communication between BitlBee processes */
/*
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 "bitlbee.h"
#include "ipc.h"
#include "commands.h"
#include <sys/uio.h>
#include <sys/un.h>
GSList *child_list = NULL;
static int ipc_child_recv_fd = -1;
static void ipc_master_takeover_fail(struct bitlbee_child *child, gboolean both);
static gboolean ipc_send_fd(int fd, int send_fd);
/* On Solaris and possibly other systems passing FDs between processes is
* not possible (or at least not using the method used in this file.
* Just disable that code, the functionality is not that important. */
#if defined(NO_FD_PASSING) && !defined(CMSG_SPACE)
#define CMSG_SPACE(len) 1
#endif
static void ipc_master_cmd_client(irc_t *data, char **cmd)
{
/* Normally data points at an irc_t block, but for the IPC master
this is different. We think this scary cast is better than
creating a new command_t structure, just to make the compiler
happy. */
struct bitlbee_child *child = (void *) data;
if (child && cmd[1]) {
child->host = g_strdup(cmd[1]);
child->nick = g_strdup(cmd[2]);
child->realname = g_strdup(cmd[3]);
}
/* CLIENT == On initial connects, HELLO is after /RESTARTs. */
if (g_strcasecmp(cmd[0], "CLIENT") == 0) {
ipc_to_children_str("OPERMSG :Client connecting (PID=%d): %s@%s (%s)\r\n",
(int) (child ? child->pid : -1), cmd[2], cmd[1], cmd[3]);
}
}
static void ipc_master_cmd_nick(irc_t *data, char **cmd)
{
struct bitlbee_child *child = (void *) data;
if (child && cmd[1]) {
g_free(child->nick);
child->nick = g_strdup(cmd[1]);
}
}
static void ipc_master_cmd_die(irc_t *data, char **cmd)
{
if (global.conf->runmode == RUNMODE_FORKDAEMON) {
ipc_to_children_str("DIE\r\n");
}
bitlbee_shutdown(NULL, -1, 0);
}
static void ipc_master_cmd_deaf(irc_t *data, char **cmd)
{
if (global.conf->runmode == RUNMODE_DAEMON) {
b_event_remove(global.listen_watch_source_id);
close(global.listen_socket);
global.listen_socket = global.listen_watch_source_id = -1;
ipc_to_children_str("OPERMSG :Closed listening socket, waiting "
"for all users to disconnect.");
} else {
ipc_to_children_str("OPERMSG :The DEAF command only works in "
"normal daemon mode. Try DIE instead.");
}
}
void ipc_master_cmd_rehash(irc_t *data, char **cmd)
{
runmode_t oldmode;
oldmode = global.conf->runmode;
g_free(global.conf);
global.conf = conf_load(0, NULL);
if (global.conf->runmode != oldmode) {
log_message(LOGLVL_WARNING, "Can't change RunMode setting at runtime, restoring original setting");
global.conf->runmode = oldmode;
}
if (global.conf->runmode == RUNMODE_FORKDAEMON) {
ipc_to_children(cmd);
}
}
void ipc_master_cmd_restart(irc_t *data, char **cmd)
{
if (global.conf->runmode != RUNMODE_FORKDAEMON) {
/* Tell child that this is unsupported. */
return;
}
global.restart = -1;
bitlbee_shutdown(NULL, -1, 0);
}
void ipc_master_cmd_identify(irc_t *data, char **cmd)
{
struct bitlbee_child *child = (void *) data, *old = NULL;
char *resp;
GSList *l;
if (!child || !child->nick || strcmp(child->nick, cmd[1]) != 0) {
return;
}
g_free(child->password);
child->password = g_strdup(cmd[2]);
for (l = child_list; l; l = l->next) {
old = l->data;
if (child != old &&
old->nick && nick_cmp(NULL, old->nick, child->nick) == 0 &&
old->password && strcmp(old->password, child->password) == 0) {
break;
}
}
if (l && !child->to_child && !old->to_child) {
resp = "TAKEOVER INIT\r\n";
child->to_child = old;
old->to_child = child;
} else {
/* Won't need the fd since we can't send it anywhere. */
closesocket(child->to_fd);
child->to_fd = -1;
resp = "TAKEOVER NO\r\n";
}
if (write(child->ipc_fd, resp, strlen(resp)) != strlen(resp)) {
ipc_master_free_one(child);
}
}
void ipc_master_cmd_takeover(irc_t *data, char **cmd)
{
struct bitlbee_child *child = (void *) data;
char *fwd = NULL;
/* Normal daemon mode doesn't keep these and has simplified code for
takeovers. */
if (child == NULL) {
return;
}
if (child->to_child == NULL ||
g_slist_find(child_list, child->to_child) == NULL) {
return ipc_master_takeover_fail(child, FALSE);
}
if (strcmp(cmd[1], "AUTH") == 0) {
/* New connection -> Master */
if (child->to_child &&
child->nick && child->to_child->nick && cmd[2] &&
child->password && child->to_child->password && cmd[3] &&
strcmp(child->nick, child->to_child->nick) == 0 &&
strcmp(child->nick, cmd[2]) == 0 &&
strcmp(child->password, child->to_child->password) == 0 &&
strcmp(child->password, cmd[3]) == 0) {
ipc_send_fd(child->to_child->ipc_fd, child->to_fd);
fwd = irc_build_line(cmd);
if (write(child->to_child->ipc_fd, fwd, strlen(fwd)) != strlen(fwd)) {
ipc_master_free_one(child);
}
g_free(fwd);
} else {
return ipc_master_takeover_fail(child, TRUE);
}
} else if (strcmp(cmd[1], "DONE") == 0 || strcmp(cmd[1], "FAIL") == 0) {
/* Old connection -> Master */
int fd;
/* The copy was successful (or not), we don't need it anymore. */
closesocket(child->to_fd);
child->to_fd = -1;
/* Pass it through to the other party, and flush all state. */
fwd = irc_build_line(cmd);
fd = child->to_child->ipc_fd;
child->to_child->to_child = NULL;
child->to_child = NULL;
if (write(fd, fwd, strlen(fwd)) != strlen(fwd)) {
ipc_master_free_one(child);
}
g_free(fwd);
}
}
static const command_t ipc_master_commands[] = {
{ "client", 3, ipc_master_cmd_client, 0 },
{ "hello", 0, ipc_master_cmd_client, 0 },
{ "nick", 1, ipc_master_cmd_nick, 0 },
{ "die", 0, ipc_master_cmd_die, 0 },
{ "deaf", 0, ipc_master_cmd_deaf, 0 },
{ "wallops", 1, NULL, IPC_CMD_TO_CHILDREN },
{ "wall", 1, NULL, IPC_CMD_TO_CHILDREN },
{ "opermsg", 1, NULL, IPC_CMD_TO_CHILDREN },
{ "rehash", 0, ipc_master_cmd_rehash, 0 },
{ "kill", 2, NULL, IPC_CMD_TO_CHILDREN },
{ "restart", 0, ipc_master_cmd_restart, 0 },
{ "identify", 2, ipc_master_cmd_identify, 0 },
{ "takeover", 1, ipc_master_cmd_takeover, 0 },
{ NULL }
};
static void ipc_child_cmd_die(irc_t *irc, char **cmd)
{
irc_abort(irc, 0, "Shutdown requested by operator");
}
static void ipc_child_cmd_wallops(irc_t *irc, char **cmd)
{
if (!(irc->status & USTATUS_LOGGED_IN)) {
return;
}
if (strchr(irc->umode, 'w')) {
irc_write(irc, ":%s WALLOPS :%s", irc->root->host, cmd[1]);
}
}
static void ipc_child_cmd_wall(irc_t *irc, char **cmd)
{
if (!(irc->status & USTATUS_LOGGED_IN)) {
return;
}
if (strchr(irc->umode, 's')) {
irc_write(irc, ":%s NOTICE %s :%s", irc->root->host, irc->user->nick, cmd[1]);
}
}
static void ipc_child_cmd_opermsg(irc_t *irc, char **cmd)
{
if (!(irc->status & USTATUS_LOGGED_IN)) {
return;
}
if (strchr(irc->umode, 'o')) {
irc_write(irc, ":%s NOTICE %s :*** OperMsg *** %s", irc->root->host, irc->user->nick, cmd[1]);
}
}
static void ipc_child_cmd_rehash(irc_t *irc, char **cmd)
{
runmode_t oldmode;
oldmode = global.conf->runmode;
g_free(global.conf);
global.conf = conf_load(0, NULL);
global.conf->runmode = oldmode;
}
static void ipc_child_cmd_kill(irc_t *irc, char **cmd)
{
if (!(irc->status & USTATUS_LOGGED_IN)) {
return;
}
if (nick_cmp(NULL, cmd[1], irc->user->nick) != 0) {
return; /* It's not for us. */
}
irc_write(irc, ":%s!%s@%s KILL %s :%s", irc->root->nick, irc->root->nick, irc->root->host, irc->user->nick,
cmd[2]);
irc_abort(irc, 0, "Killed by operator: %s", cmd[2]);
}
static void ipc_child_cmd_hello(irc_t *irc, char **cmd)
{
if (!(irc->status & USTATUS_LOGGED_IN)) {
ipc_to_master_str("HELLO\r\n");
} else {
ipc_to_master_str("HELLO %s %s :%s\r\n", irc->user->host, irc->user->nick, irc->user->fullname);
}
}
static void ipc_child_cmd_takeover_yes(void *data);
static void ipc_child_cmd_takeover_no(void *data);
static void ipc_child_cmd_takeover(irc_t *irc, char **cmd)
{
if (strcmp(cmd[1], "NO") == 0) {
/* Master->New connection */
/* No takeover, finish the login. */
} else if (strcmp(cmd[1], "INIT") == 0) {
/* Master->New connection */
if (!set_getbool(&irc->b->set, "allow_takeover")) {
ipc_child_cmd_takeover_no(irc);
return;
}
/* Offer to take over the old session, unless for some reason
we're already logging into IM connections. */
if (irc->login_source_id != -1) {
query_add(irc, NULL,
"You're already connected to this server. "
"Would you like to take over this session?",
ipc_child_cmd_takeover_yes,
ipc_child_cmd_takeover_no, NULL, irc);
}
/* This one's going to connect to accounts, avoid that. */
b_event_remove(irc->login_source_id);
irc->login_source_id = -1;
} else if (strcmp(cmd[1], "AUTH") == 0) {
/* Master->Old connection */
if (irc->password && cmd[2] && cmd[3] &&
ipc_child_recv_fd != -1 &&
strcmp(irc->user->nick, cmd[2]) == 0 &&
strcmp(irc->password, cmd[3]) == 0 &&
set_getbool(&irc->b->set, "allow_takeover")) {
irc_switch_fd(irc, ipc_child_recv_fd);
irc_sync(irc);
irc_rootmsg(irc, "You've successfully taken over your old session");
ipc_child_recv_fd = -1;
ipc_to_master_str("TAKEOVER DONE\r\n");
} else {
ipc_to_master_str("TAKEOVER FAIL\r\n");
}
} else if (strcmp(cmd[1], "DONE") == 0) {
/* Master->New connection (now taken over by old process) */
irc_free(irc);
} else if (strcmp(cmd[1], "FAIL") == 0) {
/* Master->New connection */
irc_rootmsg(irc, "Could not take over old session");
}
}
static void ipc_child_cmd_takeover_yes(void *data)
{
irc_t *irc = data, *old = NULL;
char *to_auth[] = { "TAKEOVER", "AUTH", irc->user->nick, irc->password, NULL };
/* Master->New connection */
ipc_to_master_str("TAKEOVER AUTH %s :%s\r\n",
irc->user->nick, irc->password);
if (global.conf->runmode == RUNMODE_DAEMON) {
GSList *l;
for (l = irc_connection_list; l; l = l->next) {
old = l->data;
if (irc != old &&
irc->user->nick && old->user->nick &&
irc->password && old->password &&
strcmp(irc->user->nick, old->user->nick) == 0 &&
strcmp(irc->password, old->password) == 0) {
break;
}
}
if (l == NULL) {
to_auth[1] = "FAIL";
ipc_child_cmd_takeover(irc, to_auth);
return;
}
}
/* Drop credentials, we'll shut down soon and shouldn't overwrite
any settings. */
irc_rootmsg(irc, "Trying to take over existing session");
irc_desync(irc);
if (old) {
ipc_child_recv_fd = dup(irc->fd);
ipc_child_cmd_takeover(old, to_auth);
}
/* TODO: irc_setpass() should do all of this. */
irc_setpass(irc, NULL);
irc->status &= ~USTATUS_IDENTIFIED;
irc_umode_set(irc, "-R", 1);
if (old) {
irc_abort(irc, FALSE, NULL);
}
}
static void ipc_child_cmd_takeover_no(void *data)
{
ipc_to_master_str("TAKEOVER NO\r\n");
cmd_identify_finish(data, 0, 0);
}
static const command_t ipc_child_commands[] = {
{ "die", 0, ipc_child_cmd_die, 0 },
{ "wallops", 1, ipc_child_cmd_wallops, 0 },
{ "wall", 1, ipc_child_cmd_wall, 0 },
{ "opermsg", 1, ipc_child_cmd_opermsg, 0 },
{ "rehash", 0, ipc_child_cmd_rehash, 0 },
{ "kill", 2, ipc_child_cmd_kill, 0 },
{ "hello", 0, ipc_child_cmd_hello, 0 },
{ "takeover", 1, ipc_child_cmd_takeover, 0 },
{ NULL }
};
gboolean ipc_child_identify(irc_t *irc)
{
if (global.conf->runmode == RUNMODE_FORKDAEMON) {
#ifndef NO_FD_PASSING
if (!ipc_send_fd(global.listen_socket, irc->fd)) {
ipc_child_disable();
}
ipc_to_master_str("IDENTIFY %s :%s\r\n", irc->user->nick, irc->password);
#endif
return TRUE;
} else if (global.conf->runmode == RUNMODE_DAEMON) {
GSList *l;
irc_t *old = NULL;
char *to_init[] = { "TAKEOVER", "INIT", NULL };
for (l = irc_connection_list; l; l = l->next) {
old = l->data;
if (irc != old &&
irc->user->nick && old->user->nick &&
irc->password && old->password &&
strcmp(irc->user->nick, old->user->nick) == 0 &&
strcmp(irc->password, old->password) == 0) {
break;
}
}
if (l == NULL || old == NULL ||
!set_getbool(&irc->b->set, "allow_takeover") ||
!set_getbool(&old->b->set, "allow_takeover")) {
return FALSE;
}
ipc_child_cmd_takeover(irc, to_init);
return TRUE;
} else {
return FALSE;
}
}
static void ipc_master_takeover_fail(struct bitlbee_child *child, gboolean both)
{
if (child == NULL || g_slist_find(child_list, child) == NULL) {
return;
}
if (both && child->to_child != NULL) {
ipc_master_takeover_fail(child->to_child, FALSE);
}
if (child->to_fd > -1) {
/* Send this error only to the new connection, which can be
recognised by to_fd being set. */
if (write(child->ipc_fd, "TAKEOVER FAIL\r\n", 15) != 15) {
ipc_master_free_one(child);
return;
}
close(child->to_fd);
child->to_fd = -1;
}
child->to_child = NULL;
}
static void ipc_command_exec(void *data, char **cmd, const command_t *commands)
{
int i, j;
if (!cmd[0]) {
return;
}
for (i = 0; commands[i].command; i++) {
if (g_strcasecmp(commands[i].command, cmd[0]) == 0) {
/* There is no typo in this line: */
for (j = 1; cmd[j]; j++) {
;
}
j--;
if (j < commands[i].required_parameters) {
break;
}
if (commands[i].flags & IPC_CMD_TO_CHILDREN) {
ipc_to_children(cmd);
} else {
commands[i].execute(data, cmd);
}
break;
}
}
}
/* Return just one line. Returns NULL if something broke, an empty string
on temporary "errors" (EAGAIN and friends). */
static char *ipc_readline(int fd, int *recv_fd)
{
struct msghdr msg;
struct iovec iov;
char ccmsg[CMSG_SPACE(sizeof(recv_fd))];
struct cmsghdr *cmsg;
char buf[513], *eol;
int size;
/* Because this is internal communication, it should be pretty safe
to just peek at the message, find its length (by searching for the
end-of-line) and then just read that message. With internal
sockets and limites message length, messages should always be
complete. Saves us quite a lot of code and buffering. */
size = recv(fd, buf, sizeof(buf) - 1, MSG_PEEK);
if (size == 0 || (size < 0 && !sockerr_again())) {
return NULL;
} else if (size < 0) { /* && sockerr_again() */
return(g_strdup(""));
} else {
buf[size] = 0;
}
if ((eol = strstr(buf, "\r\n")) == NULL) {
return NULL;
} else {
size = eol - buf + 2;
}
iov.iov_base = buf;
iov.iov_len = size;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
#ifndef NO_FD_PASSING
msg.msg_control = ccmsg;
msg.msg_controllen = sizeof(ccmsg);
#endif
if (recvmsg(fd, &msg, 0) != size) {
return NULL;
}
#ifndef NO_FD_PASSING
if (recv_fd) {
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
/* Getting more than one shouldn't happen but if it does,
make sure we don't leave them around. */
if (*recv_fd != -1) {
close(*recv_fd);
}
memcpy(recv_fd, CMSG_DATA(cmsg), sizeof(int));
/*
fprintf( stderr, "pid %d received fd %d\n", (int) getpid(), *recv_fd );
*/
}
}
}
#endif
/*
fprintf( stderr, "pid %d received: %s", (int) getpid(), buf );
*/
return g_strndup(buf, size - 2);
}
gboolean ipc_master_read(gpointer data, gint source, b_input_condition cond)
{
struct bitlbee_child *child = data;
char *buf, **cmd;
if ((buf = ipc_readline(source, &child->to_fd))) {
cmd = irc_parse_line(buf);
if (cmd) {
ipc_command_exec(child, cmd, ipc_master_commands);
g_free(cmd);
}
g_free(buf);
} else {
ipc_master_free_fd(source);
}
return TRUE;
}
gboolean ipc_child_read(gpointer data, gint source, b_input_condition cond)
{
char *buf, **cmd;
if ((buf = ipc_readline(source, &ipc_child_recv_fd))) {
cmd = irc_parse_line(buf);
if (cmd) {
ipc_command_exec(data, cmd, ipc_child_commands);
g_free(cmd);
}
g_free(buf);
} else {
ipc_child_disable();
}
return TRUE;
}
void ipc_to_master(char **cmd)
{
if (global.conf->runmode == RUNMODE_FORKDAEMON) {
char *s = irc_build_line(cmd);
ipc_to_master_str("%s", s);
g_free(s);
} else if (global.conf->runmode == RUNMODE_DAEMON) {
ipc_command_exec(NULL, cmd, ipc_master_commands);
}
}
void ipc_to_master_str(char *format, ...)
{
char *msg_buf;
va_list params;
va_start(params, format);
msg_buf = g_strdup_vprintf(format, params);
va_end(params);
if (strlen(msg_buf) > 512) {
/* Don't send it, it's too long... */
} else if (global.conf->runmode == RUNMODE_FORKDAEMON) {
if (global.listen_socket >= 0) {
if (write(global.listen_socket, msg_buf, strlen(msg_buf)) <= 0) {
ipc_child_disable();
}
}
} else if (global.conf->runmode == RUNMODE_DAEMON) {
char **cmd, *s;
if ((s = strchr(msg_buf, '\r'))) {
*s = 0;
}
cmd = irc_parse_line(msg_buf);
ipc_command_exec(NULL, cmd, ipc_master_commands);
g_free(cmd);
}
g_free(msg_buf);
}
void ipc_to_children(char **cmd)
{
if (global.conf->runmode == RUNMODE_FORKDAEMON) {
char *msg_buf = irc_build_line(cmd);
ipc_to_children_str("%s", msg_buf);
g_free(msg_buf);
} else if (global.conf->runmode == RUNMODE_DAEMON) {
GSList *l;
for (l = irc_connection_list; l; l = l->next) {
ipc_command_exec(l->data, cmd, ipc_child_commands);
}
}
}
void ipc_to_children_str(char *format, ...)
{
char *msg_buf;
va_list params;
va_start(params, format);
msg_buf = g_strdup_vprintf(format, params);
va_end(params);
if (strlen(msg_buf) > 512) {
/* Don't send it, it's too long... */
} else if (global.conf->runmode == RUNMODE_FORKDAEMON) {
int msg_len = strlen(msg_buf);
GSList *l, *next;
for (l = child_list; l; l = next) {
struct bitlbee_child *c = l->data;
next = l->next;
if (write(c->ipc_fd, msg_buf, msg_len) <= 0) {
ipc_master_free_one(c);
}
}
} else if (global.conf->runmode == RUNMODE_DAEMON) {
char **cmd, *s;
if ((s = strchr(msg_buf, '\r'))) {
*s = 0;
}
cmd = irc_parse_line(msg_buf);
ipc_to_children(cmd);
g_free(cmd);
}
g_free(msg_buf);
}
static gboolean ipc_send_fd(int fd, int send_fd)
{
struct msghdr msg;
struct iovec iov;
char ccmsg[CMSG_SPACE(sizeof(fd))];
struct cmsghdr *cmsg;
memset(&msg, 0, sizeof(msg));
iov.iov_base = "0x90\r\n"; /* Ja, noppes */
iov.iov_len = 6;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
#ifndef NO_FD_PASSING
msg.msg_control = ccmsg;
msg.msg_controllen = sizeof(ccmsg);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(send_fd));
memcpy(CMSG_DATA(cmsg), &send_fd, sizeof(int));
msg.msg_controllen = cmsg->cmsg_len;
#endif
return sendmsg(fd, &msg, 0) == 6;
}
void ipc_master_free_one(struct bitlbee_child *c)
{
GSList *l;
b_event_remove(c->ipc_inpa);
closesocket(c->ipc_fd);
if (c->to_fd != -1) {
close(c->to_fd);
}
child_list = g_slist_remove(child_list, c);
g_free(c->host);
g_free(c->nick);
g_free(c->realname);
g_free(c->password);
g_free(c);
/* Also, if any child has a reference to this one, remove it. */
for (l = child_list; l; l = l->next) {
struct bitlbee_child *oc = l->data;
if (oc->to_child == c) {
ipc_master_takeover_fail(oc, FALSE);
}
}
}
void ipc_master_free_fd(int fd)
{
GSList *l;
struct bitlbee_child *c;
for (l = child_list; l; l = l->next) {
c = l->data;
if (c->ipc_fd == fd) {
ipc_master_free_one(c);
break;
}
}
}
void ipc_master_free_all()
{
while (child_list) {
ipc_master_free_one(child_list->data);
}
}
void ipc_child_disable()
{
b_event_remove(global.listen_watch_source_id);
close(global.listen_socket);
global.listen_socket = -1;
}
char *ipc_master_save_state()
{
char *fn = g_strdup("/tmp/bee-restart.XXXXXX");
int fd = mkstemp(fn);
GSList *l;
FILE *fp;
int i;
if (fd == -1) {
log_message(LOGLVL_ERROR, "Could not create temporary file: %s", strerror(errno));
g_free(fn);
return NULL;
}
/* This is more convenient now. */
fp = fdopen(fd, "w");
for (l = child_list, i = 0; l; l = l->next) {
i++;
}
/* Number of client processes. */
fprintf(fp, "%d\n", i);
for (l = child_list; l; l = l->next) {
fprintf(fp, "%d %d\n", (int) ((struct bitlbee_child*) l->data)->pid,
((struct bitlbee_child*) l->data)->ipc_fd);
}
if (fclose(fp) == 0) {
return fn;
} else {
unlink(fn);
g_free(fn);
return NULL;
}
}
static gboolean new_ipc_client(gpointer data, gint serversock, b_input_condition cond)
{
struct bitlbee_child *child = g_new0(struct bitlbee_child, 1);
child->to_fd = -1;
child->ipc_fd = accept(serversock, NULL, 0);
if (child->ipc_fd == -1) {
log_message(LOGLVL_WARNING, "Unable to accept connection on UNIX domain socket: %s", strerror(errno));
return TRUE;
}
child->ipc_inpa = b_input_add(child->ipc_fd, B_EV_IO_READ, ipc_master_read, child);
child_list = g_slist_prepend(child_list, child);
return TRUE;
}
int ipc_master_listen_socket()
{
struct sockaddr_un un_addr;
int serversock;
if (!IPCSOCKET || !*IPCSOCKET) {
return 1;
}
/* Clean up old socket files that were hanging around.. */
if (unlink(IPCSOCKET) == -1 && errno != ENOENT) {
log_message(LOGLVL_ERROR, "Could not remove old IPC socket at %s: %s", IPCSOCKET, strerror(errno));
return 0;
}
un_addr.sun_family = AF_UNIX;
strcpy(un_addr.sun_path, IPCSOCKET);
serversock = socket(AF_UNIX, SOCK_STREAM, 0);
if (serversock == -1) {
log_message(LOGLVL_WARNING, "Unable to create UNIX socket: %s", strerror(errno));
return 0;
}
if (bind(serversock, (struct sockaddr *) &un_addr, sizeof(un_addr)) == -1) {
log_message(LOGLVL_WARNING, "Unable to bind UNIX socket to %s: %s", IPCSOCKET, strerror(errno));
return 0;
}
if (listen(serversock, 5) == -1) {
log_message(LOGLVL_WARNING, "Unable to listen on UNIX socket: %s", strerror(errno));
return 0;
}
b_input_add(serversock, B_EV_IO_READ, new_ipc_client, NULL);
return 1;
}
int ipc_master_load_state(char *statefile)
{
struct bitlbee_child *child;
FILE *fp;
int i, n;
if (statefile == NULL) {
return 0;
}
fp = fopen(statefile, "r");
unlink(statefile); /* Why do it later? :-) */
if (fp == NULL) {
return 0;
}
if (fscanf(fp, "%d", &n) != 1) {
log_message(LOGLVL_WARNING, "Could not import state information for child processes.");
fclose(fp);
return 0;
}
log_message(LOGLVL_INFO, "Importing information for %d child processes.", n);
for (i = 0; i < n; i++) {
child = g_new0(struct bitlbee_child, 1);
if (fscanf(fp, "%d %d", (int *) &child->pid, &child->ipc_fd) != 2) {
log_message(LOGLVL_WARNING, "Unexpected end of file: Only processed %d clients.", i);
g_free(child);
fclose(fp);
return 0;
}
child->ipc_inpa = b_input_add(child->ipc_fd, B_EV_IO_READ, ipc_master_read, child);
child->to_fd = -1;
child_list = g_slist_prepend(child_list, child);
}
ipc_to_children_str("HELLO\r\n");
ipc_to_children_str("OPERMSG :New %s master process started (version %s)\r\n", PACKAGE, BITLBEE_VERSION);
fclose(fp);
return 1;
}
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