/**
* Fork a child process.
*/
GLOBAL pid_t
Proc_Fork(PROC_STAT *proc, int *pipefds, void (*cbfunc)(int, short), int timeout)
{
pid_t pid;
unsigned int seed;
assert(proc != NULL);
assert(pipefds != NULL);
assert(cbfunc != NULL);
if (pipe(pipefds) != 0) {
Log(LOG_ALERT, "Can't create output pipe for child process: %s!",
strerror(errno));
return -1;
}
seed = (unsigned int)rand();
pid = fork();
switch (pid) {
case -1:
/* Error on fork: */
Log(LOG_CRIT, "Can't fork child process: %s!", strerror(errno));
close(pipefds[0]);
close(pipefds[1]);
return -1;
case 0:
/* New child process: */
srand(seed ^ (unsigned int)time(NULL) ^ getpid());
Signals_Exit();
signal(SIGTERM, Proc_GenericSignalHandler);
signal(SIGALRM, Proc_GenericSignalHandler);
close(pipefds[0]);
alarm(timeout);
return 0;
}
/* Old parent process: */
close(pipefds[1]);
if (!io_setnonblock(pipefds[0])
|| !io_event_create(pipefds[0], IO_WANTREAD, cbfunc)) {
Log(LOG_CRIT, "Can't register callback for child process: %s!",
strerror(errno));
close(pipefds[0]);
return -1;
}
proc->pid = pid;
proc->pipe_fd = pipefds[0];
return pid;
}
/**
* The main() function of ngIRCd.
*
* Here all starts: this function is called by the operating system loader,
* it is the first portion of code executed of ngIRCd.
*
* @param argc The number of arguments passed to ngIRCd on the command line.
* @param argv An array containing all the arguments passed to ngIRCd.
* @return Global exit code of ngIRCd, zero on success.
*/
GLOBAL int
main(int argc, const char *argv[])
{
bool ok, configtest = false;
bool NGIRCd_NoDaemon = false;
int i;
size_t n;
#if defined(DEBUG) && defined(HAVE_MTRACE)
/* enable GNU libc memory tracing when running in debug mode
* and functionality available */
mtrace();
#endif
umask(0077);
NGIRCd_SignalQuit = NGIRCd_SignalRestart = false;
NGIRCd_Passive = false;
#ifdef DEBUG
NGIRCd_Debug = false;
#endif
#ifdef SNIFFER
NGIRCd_Sniffer = false;
#endif
strlcpy(NGIRCd_ConfFile, SYSCONFDIR, sizeof(NGIRCd_ConfFile));
strlcat(NGIRCd_ConfFile, CONFIG_FILE, sizeof(NGIRCd_ConfFile));
Fill_Version();
/* parse conmmand line */
for (i = 1; i < argc; i++) {
ok = false;
if (argv[i][0] == '-' && argv[i][1] == '-') {
/* long option */
if (strcmp(argv[i], "--config") == 0) {
if (i + 1 < argc) {
/* Ok, there's an parameter left */
strlcpy(NGIRCd_ConfFile, argv[i+1],
sizeof(NGIRCd_ConfFile));
/* next parameter */
i++; ok = true;
}
}
if (strcmp(argv[i], "--configtest") == 0) {
configtest = true;
ok = true;
}
#ifdef DEBUG
if (strcmp(argv[i], "--debug") == 0) {
NGIRCd_Debug = true;
ok = true;
}
#endif
if (strcmp(argv[i], "--help") == 0) {
Show_Version();
puts(""); Show_Help( ); puts( "" );
exit(1);
}
if (strcmp(argv[i], "--nodaemon") == 0) {
NGIRCd_NoDaemon = true;
ok = true;
}
if (strcmp(argv[i], "--passive") == 0) {
NGIRCd_Passive = true;
ok = true;
}
#ifdef SNIFFER
if (strcmp(argv[i], "--sniffer") == 0) {
NGIRCd_Sniffer = true;
ok = true;
}
#endif
if (strcmp(argv[i], "--version") == 0) {
Show_Version();
exit(1);
}
}
else if(argv[i][0] == '-' && argv[i][1] != '-') {
/* short option */
for (n = 1; n < strlen(argv[i]); n++) {
ok = false;
#ifdef DEBUG
if (argv[i][n] == 'd') {
NGIRCd_Debug = true;
ok = true;
}
#endif
if (argv[i][n] == 'f') {
if (!argv[i][n+1] && i+1 < argc) {
/* Ok, next character is a blank */
strlcpy(NGIRCd_ConfFile, argv[i+1],
sizeof(NGIRCd_ConfFile));
/* go to the following parameter */
i++;
n = strlen(argv[i]);
ok = true;
}
}
if (argv[i][n] == 'h') {
Show_Version();
puts(""); Show_Help(); puts("");
exit(1);
}
if (argv[i][n] == 'n') {
NGIRCd_NoDaemon = true;
ok = true;
}
if (argv[i][n] == 'p') {
NGIRCd_Passive = true;
ok = true;
}
#ifdef SNIFFER
if (argv[i][n] == 's') {
NGIRCd_Sniffer = true;
ok = true;
}
#endif
if (argv[i][n] == 't') {
configtest = true;
ok = true;
}
if (argv[i][n] == 'V') {
Show_Version();
exit(1);
}
if (!ok) {
printf("%s: invalid option \"-%c\"!\n",
PACKAGE_NAME, argv[i][n]);
printf("Try \"%s --help\" for more information.\n",
PACKAGE_NAME);
exit(1);
}
}
}
if (!ok) {
printf("%s: invalid option \"%s\"!\n",
PACKAGE_NAME, argv[i]);
printf("Try \"%s --help\" for more information.\n",
PACKAGE_NAME);
exit(1);
}
}
/* Debug level for "VERSION" command */
NGIRCd_DebugLevel[0] = '\0';
#ifdef DEBUG
if (NGIRCd_Debug)
strcpy(NGIRCd_DebugLevel, "1");
#endif
#ifdef SNIFFER
if (NGIRCd_Sniffer) {
NGIRCd_Debug = true;
strcpy(NGIRCd_DebugLevel, "2");
}
#endif
if (configtest) {
Show_Version(); puts("");
exit(Conf_Test());
}
while (!NGIRCd_SignalQuit) {
/* Initialize global variables */
NGIRCd_Start = time(NULL);
(void)strftime(NGIRCd_StartStr, 64,
"%a %b %d %Y at %H:%M:%S (%Z)",
localtime(&NGIRCd_Start));
NGIRCd_SignalRestart = false;
NGIRCd_SignalQuit = false;
/* Initialize modules, part I */
Log_Init(!NGIRCd_NoDaemon);
Random_Init();
Conf_Init();
Log_ReInit();
/* Initialize the "main program": chroot environment, user and
* group ID, ... */
if (!NGIRCd_Init(NGIRCd_NoDaemon)) {
Log(LOG_ALERT, "Fatal: Initialization failed, exiting!");
exit(1);
}
/* Initialize modules, part II: these functions are eventually
* called with already dropped privileges ... */
Channel_Init();
Client_Init();
Conn_Init();
Class_Init();
if (!io_library_init(CONNECTION_POOL)) {
Log(LOG_ALERT,
"Fatal: Could not initialize IO routines: %s",
strerror(errno));
exit(1);
}
if (!Signals_Init()) {
Log(LOG_ALERT,
"Fatal: Could not set up signal handlers: %s",
strerror(errno));
exit(1);
}
/* Create protocol and server identification. The syntax
* used by ngIRCd in PASS commands and the known "extended
* flags" are described in doc/Protocol.txt. */
#ifdef IRCPLUS
snprintf(NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s:%s",
PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION,
IRCPLUSFLAGS);
#ifdef ZLIB
strlcat(NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID);
#endif
if (Conf_OperCanMode)
strlcat(NGIRCd_ProtoID, "o", sizeof NGIRCd_ProtoID);
#else /* IRCPLUS */
snprintf(NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s",
PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION);
#endif /* IRCPLUS */
strlcat(NGIRCd_ProtoID, " P", sizeof NGIRCd_ProtoID);
#ifdef ZLIB
strlcat(NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID);
#endif
LogDebug("Protocol and server ID is \"%s\".", NGIRCd_ProtoID);
Channel_InitPredefined();
if (Conn_InitListeners() < 1) {
Log(LOG_ALERT,
"Server isn't listening on a single port!" );
Log(LOG_ALERT,
"%s exiting due to fatal errors!", PACKAGE_NAME);
Pidfile_Delete();
exit(1);
}
/* Main Run Loop */
Conn_Handler();
Conn_Exit();
Client_Exit();
Channel_Exit();
Class_Exit();
Log_Exit();
Signals_Exit();
}
Pidfile_Delete();
return 0;
} /* main */
