int
main (int argc, char **argv)
{
int oldpid;
mode_t oldumask;
char cmdbuf[1024];
/* make sure at least world write access is disabled */
if (((oldumask = umask(022)) & 002) == 002)
(void) umask (oldumask);
#ifndef NOXDMTITLE
Title = argv[0];
TitleLen = (argv[argc - 1] + strlen(argv[argc - 1])) - Title;
#endif
#ifdef USESECUREWARE
set_auth_parameters (argc, argv);
#endif
/*
* Step 1 - load configuration parameters
*/
InitResources (argc, argv);
SetConfigFileTime ();
LoadDMResources ();
/*
* Only allow root to run in non-debug mode to avoid problems
*/
if (debugLevel == 0 && getuid() != 0)
{
fprintf (stderr, "Only root wants to run %s\n", argv[0]);
exit (1);
}
if (debugLevel == 0 && daemonMode)
BecomeDaemon ();
if (debugLevel == 0)
InitErrorLog ();
if (debugLevel >= 10)
nofork_session = 1;
/* SUPPRESS 560 */
if ((oldpid = StorePid ()))
{
if (oldpid == -1)
LogError ("Can't create/lock pid file %s\n", pidFile);
else
LogError ("Can't lock pid file %s, another xdm is running (pid %d)\n",
pidFile, oldpid);
exit (1);
}
LogInfo ("Starting\n");
if (atexit (RemovePid))
LogError ("could not register RemovePid() with atexit()\n");
if (nofork_session == 0) {
/* Clean up any old Authorization files */
/* AUD: all good? */
snprintf(cmdbuf, sizeof(cmdbuf), "/bin/rm -f %s/authdir/authfiles/A*", authDir);
system(cmdbuf);
}
#if!defined(HAVE_ARC4RANDOM) && !defined(DEV_RANDOM)
AddOtherEntropy ();
#endif
#ifdef XDMCP
init_session_id ();
CreateWellKnownSockets ();
#else
Debug ("xdm: not compiled for XDMCP\n");
#endif
parent_pid = getpid ();
(void) Signal (SIGTERM, StopAll);
(void) Signal (SIGINT, StopAll);
/*
* Step 2 - Read /etc/Xservers and set up
* the socket.
*
* Keep a sub-daemon running
* for each entry
*/
SetAccessFileTime ();
#ifdef XDMCP
ScanAccessDatabase ();
UpdateListenSockets ();
#endif
ScanServers ();
StartDisplays ();
#if !defined(HAVE_ARC4RANDOM) && !defined(DEV_RANDOM)
AddOtherEntropy();
#endif
(void) Signal (SIGHUP, RescanNotify);
#ifndef UNRELIABLE_SIGNALS
(void) Signal (SIGCHLD, ChildNotify);
#endif
Debug ("startup successful; entering main loop\n");
while (
#ifdef XDMCP
AnyWellKnownSockets() ||
#endif
AnyDisplaysLeft ())
{
if (Rescan)
{
RescanServers ();
Rescan = 0;
}
#if defined(UNRELIABLE_SIGNALS) || !defined(XDMCP)
WaitForChild ();
#else
WaitForSomething ();
#endif
}
Debug ("Nothing left to do, exiting\n");
LogInfo ("Exiting\n");
exit(0);
/*NOTREACHED*/
}
int main(int argc, char **argv)
{
int oldpid, oldumask;
char cmdbuf[1024];
int debugMode = 0;
/* make sure at least world write access is disabled */
if (((oldumask = umask(022)) & 002) == 002)
(void)umask(oldumask);
#ifndef NOXDMTITLE
Title = argv[0];
TitleLen = (argv[argc - 1] + strlen(argv[argc - 1])) - Title;
#endif
/*
* Step 1 - load configuration parameters
*/
InitResources(argc, argv);
SetConfigFileTime();
LoadDMResources();
/*
* Only allow root to run in non-debug mode to avoid problems
*/
debugMode = (debugLevel.i > WDM_LEVEL_WARNING);
if (!debugMode && getuid() != 0) {
fprintf(stderr, "Only root wants to run %s\n", argv[0]);
exit(1);
}
if (!debugMode && daemonMode.i) {
BecomeOrphan();
BecomeDaemon();
}
/* SUPPRESS 560 */
if ((oldpid = StorePid())) {
if (oldpid == -1)
WDMError("Can't create/lock pid file %s\n", pidFile);
else
WDMError("Can't lock pid file %s, another wdm is running " "(pid %d)\n", pidFile, oldpid);
exit(1);
}
WDMLogLevel(debugLevel.i);
if (useSyslog.i) {
WDMUseSysLog("wdm", WDMStringToFacility(syslogFacility));
} else if (errorLogFile && *errorLogFile) {
int f;
if ((f = open(errorLogFile, O_CREAT | O_WRONLY | O_APPEND, 0600)) == -1)
WDMError("cannot open errorLogFile %s\n", errorLogFile);
else
WDMLogStream(fdopen(f, "w"));
}
/* redirect any messages for stderr into standard logging functions. */
WDMRedirectStderr(WDM_LEVEL_ERROR);
/* Clean up any old Authorization files */
sprintf(cmdbuf, "/bin/rm -f %s/authdir/authfiles/A*", authDir);
system(cmdbuf);
#ifdef XDMCP
init_session_id();
CreateWellKnownSockets();
#else
WDMDebug("wdm: not compiled for XDMCP\n");
#endif
parent_pid = getpid();
(void)Signal(SIGTERM, StopAll);
(void)Signal(SIGINT, StopAll);
/*
* Step 2 - Read /etc/Xservers and set up
* the socket.
*
* Keep a sub-daemon running
* for each entry
*/
SetAccessFileTime();
#ifdef XDMCP
ScanAccessDatabase();
#endif
ScanServers();
StartDisplays();
(void)Signal(SIGHUP, RescanNotify);
(void)Signal(SIGCHLD, ChildNotify);
while (
#ifdef XDMCP
AnyWellKnownSockets() ||
#endif
AnyDisplaysLeft()) {
if (Rescan) {
RescanServers();
Rescan = 0;
}
WaitForSomething();
}
WDMDebug("Nothing left to do, exiting\n");
exit(0);
/*NOTREACHED*/}
Dispatch()
{
int nready,
result;
int *clientReady;
ClientPtr client;
int op;
nextFreeClientID = MINCLIENT;
nClients = 0;
clientReady = (int *) ALLOCATE_LOCAL(sizeof(int) * MaxClients);
if (!clientReady)
return;
while (1) {
/* wait for something */
nready = WaitForSomething(clientReady);
while (!dispatchException && (--nready >= 0)) {
client = currentClient = clients[clientReady[nready]];
/* Client can be NULL if CloseDownClient() is called during
this dispatchException loop. */
if (client == (ClientPtr)NULL) continue;
isItTimeToYield = FALSE;
while (!isItTimeToYield) {
result = ReadRequest(client);
if (result <= 0) {
if (result < 0)
CloseDownClient(client);
break;
}
client->sequence++;
if (result > (MAX_REQUEST_SIZE << 2))
result = FSBadLength;
else
{
op = MAJOROP;
if (op >= NUM_PROC_VECTORS)
result = ProcBadRequest (client);
else
result = (*client->requestVector[op]) (client);
}
if (result != FSSuccess) {
if (client->noClientException != FSSuccess)
CloseDownClient(client);
break;
}
}
FlushAllOutput ();
}
/* reset if server is a drone and has run out of clients */
if (drone_server && nClients == 0) {
dispatchException |= DE_RESET;
}
if (dispatchException) {
/* re-read the config file */
if (dispatchException & DE_RECONFIG) {
NoticeF("Re-reading config file\n");
if (ReadConfigFile(configfilename) != FSSuccess)
ErrorF("couldn't parse config file\n");
SetConfigValues();
dispatchException &= ~DE_RECONFIG;
}
/* flush all the caches */
if (dispatchException & DE_FLUSH) {
NoticeF("flushing all caches\n");
CacheReset();
dispatchException &= ~DE_FLUSH;
}
/* reset */
if (dispatchException & DE_RESET) {
NoticeF("resetting\n");
break;
}
/* die *now* */
if (dispatchException & DE_TERMINATE) {
NoticeF("terminating\n");
kill_all_clients();
exit(0);
break;
}
}
}
kill_all_clients();
dispatchException = 0;
}
