source: unix.c @ ba3a8a5

1.2.3
Last change on this file since ba3a8a5 was f5d1b31, checked in by Wilmer van der Gaast <wilmer@…>, at 2008-06-29T23:41:39Z

Merging changes from Jelmer: It's now possible to cross-compile a Windows
version of BitlBee from Linux. No working SSL support yet though!

  • Property mode set to 100644
File size: 6.2 KB
Line 
1  /********************************************************************\
2  * BitlBee -- An IRC to other IM-networks gateway                     *
3  *                                                                    *
4  * Copyright 2002-2004 Wilmer van der Gaast and others                *
5  \********************************************************************/
6
7/* Main file (Unix specific part)                                       */
8
9/*
10  This program is free software; you can redistribute it and/or modify
11  it under the terms of the GNU General Public License as published by
12  the Free Software Foundation; either version 2 of the License, or
13  (at your option) any later version.
14
15  This program is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  GNU General Public License for more details.
19
20  You should have received a copy of the GNU General Public License with
21  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
22  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
23  Suite 330, Boston, MA  02111-1307  USA
24*/
25
26#include "bitlbee.h"
27#include "commands.h"
28#include "crypting.h"
29#include "protocols/nogaim.h"
30#include "help.h"
31#include "ipc.h"
32#include <signal.h>
33#include <unistd.h>
34#include <sys/time.h>
35#include <sys/wait.h>
36#include <pwd.h>
37
38global_t global;        /* Against global namespace pollution */
39
40static void sighandler( int signal );
41
42int main( int argc, char *argv[] )
43{
44        int i = 0;
45        char *old_cwd = NULL;
46        struct sigaction sig, old;
47       
48        log_init();
49        global.conf_file = g_strdup( CONF_FILE_DEF );
50        global.conf = conf_load( argc, argv );
51        if( global.conf == NULL )
52                return( 1 );
53       
54        b_main_init();
55        nogaim_init();
56       
57        srand( time( NULL ) ^ getpid() );
58        global.helpfile = g_strdup( HELP_FILE );
59       
60        if( global.conf->runmode == RUNMODE_INETD )
61        {
62                log_link( LOGLVL_ERROR, LOGOUTPUT_IRC );
63                log_link( LOGLVL_WARNING, LOGOUTPUT_IRC );
64       
65                i = bitlbee_inetd_init();
66                log_message( LOGLVL_INFO, "Bitlbee %s starting in inetd mode.", BITLBEE_VERSION );
67
68        }
69        else if( global.conf->runmode == RUNMODE_DAEMON )
70        {
71                log_link( LOGLVL_ERROR, LOGOUTPUT_SYSLOG );
72                log_link( LOGLVL_WARNING, LOGOUTPUT_SYSLOG );
73
74                i = bitlbee_daemon_init();
75                log_message( LOGLVL_INFO, "Bitlbee %s starting in daemon mode.", BITLBEE_VERSION );
76        }
77        else if( global.conf->runmode == RUNMODE_FORKDAEMON )
78        {
79                /* In case the operator requests a restart, we need this. */
80                old_cwd = g_malloc( 256 );
81                if( getcwd( old_cwd, 255 ) == NULL )
82                {
83                        log_message( LOGLVL_WARNING, "Could not save current directory: %s", strerror( errno ) );
84                        g_free( old_cwd );
85                        old_cwd = NULL;
86                }
87               
88                i = bitlbee_daemon_init();
89                log_message( LOGLVL_INFO, "Bitlbee %s starting in forking daemon mode.", BITLBEE_VERSION );
90        }
91        if( i != 0 )
92                return( i );
93       
94        if( ( global.conf->user && *global.conf->user ) &&
95            ( global.conf->runmode == RUNMODE_DAEMON || 
96              global.conf->runmode == RUNMODE_FORKDAEMON ) &&
97            ( !getuid() || !geteuid() ) )
98        {
99                struct passwd *pw = NULL;
100                pw = getpwnam( global.conf->user );
101                if( pw )
102                {
103                        setgid( pw->pw_gid );
104                        setuid( pw->pw_uid );
105                }
106        }
107
108        global.storage = storage_init( global.conf->primary_storage, global.conf->migrate_storage );
109        if( global.storage == NULL )
110        {
111                log_message( LOGLVL_ERROR, "Unable to load storage backend '%s'", global.conf->primary_storage );
112                return( 1 );
113        }
114       
115        /* Catch some signals to tell the user what's happening before quitting */
116        memset( &sig, 0, sizeof( sig ) );
117        sig.sa_handler = sighandler;
118        sigaction( SIGCHLD, &sig, &old );
119        sigaction( SIGPIPE, &sig, &old );
120        sig.sa_flags = SA_RESETHAND;
121        sigaction( SIGINT,  &sig, &old );
122        sigaction( SIGILL,  &sig, &old );
123        sigaction( SIGBUS,  &sig, &old );
124        sigaction( SIGFPE,  &sig, &old );
125        sigaction( SIGSEGV, &sig, &old );
126        sigaction( SIGTERM, &sig, &old );
127        sigaction( SIGQUIT, &sig, &old );
128        sigaction( SIGXCPU, &sig, &old );
129       
130        if( !getuid() || !geteuid() )
131                log_message( LOGLVL_WARNING, "BitlBee is running with root privileges. Why?" );
132        if( help_init( &global.help, global.helpfile ) == NULL )
133                log_message( LOGLVL_WARNING, "Error opening helpfile %s.", HELP_FILE );
134       
135        b_main_run();
136       
137        /* Mainly good for restarting, to make sure we close the help.txt fd. */
138        help_free( &global.help );
139       
140        if( global.restart )
141        {
142                char *fn = ipc_master_save_state();
143               
144                chdir( old_cwd );
145               
146                setenv( "_BITLBEE_RESTART_STATE", fn, 1 );
147                g_free( fn );
148               
149                close( global.listen_socket );
150               
151                if( execv( argv[0], argv ) == -1 )
152                        /* Apparently the execve() failed, so let's just
153                           jump back into our own/current main(). */
154                        /* Need more cleanup code to make this work. */
155                        return 1; /* main( argc, argv ); */
156        }
157       
158        return( 0 );
159}
160
161static void sighandler( int signal )
162{
163        /* FIXME: Calling log_message() here is not a very good idea! */
164       
165        if( signal == SIGTERM )
166        {
167                static int first = 1;
168               
169                if( first )
170                {
171                        /* We don't know what we were doing when this signal came in. It's not safe to touch
172                           the user data now (not to mention writing them to disk), so add a timer. */
173                       
174                        log_message( LOGLVL_ERROR, "SIGTERM received, cleaning up process." );
175                        b_timeout_add( 1, (b_event_handler) bitlbee_shutdown, NULL );
176                       
177                        first = 0;
178                }
179                else
180                {
181                        /* Well, actually, for now we'll never need this part because this signal handler
182                           will never be called more than once in a session for a non-SIGPIPE signal...
183                           But just in case we decide to change that: */
184                       
185                        log_message( LOGLVL_ERROR, "SIGTERM received twice, so long for a clean shutdown." );
186                        raise( signal );
187                }
188        }
189        else if( signal == SIGCHLD )
190        {
191                pid_t pid;
192                int st;
193               
194                while( ( pid = waitpid( 0, &st, WNOHANG ) ) > 0 )
195                {
196                        if( WIFSIGNALED( st ) )
197                                log_message( LOGLVL_INFO, "Client %d terminated normally. (status = %d)", (int) pid, WEXITSTATUS( st ) );
198                        else if( WIFEXITED( st ) )
199                                log_message( LOGLVL_INFO, "Client %d killed by signal %d.", (int) pid, WTERMSIG( st ) );
200                }
201        }
202        else if( signal != SIGPIPE )
203        {
204                log_message( LOGLVL_ERROR, "Fatal signal received: %d. That's probably a bug.", signal );
205                raise( signal );
206        }
207}
208
209double gettime()
210{
211        struct timeval time[1];
212
213        gettimeofday( time, 0 );
214        return( (double) time->tv_sec + (double) time->tv_usec / 1000000 );
215}
216
217
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