int main(int argc, char **argv)
{
int c = 0;
int become_daemon = 1;
int config_loaded = 0;
config_t config;
char *pidfile = NULL;
opterr = 0;
while ((c = getopt(argc, argv, "sc:p:")) != -1) {
switch (c) {
case 's':
become_daemon = 0;
break;
case 'c':
loadConfig(&config, optarg);
config_loaded = 1;
break;
case 'p':
pidfile = malloc(strlen(optarg) + 1);
strcpy(pidfile, optarg);
break;
case 'h':
printUsage();
exit(0);
break;
case '?':
printUsage();
exit(EXIT_FAILURE);
break;
default:
exit(EXIT_FAILURE);
}
}
if (signal(SIGTERM, catch_signal) == SIG_ERR) {
logError("Error while setting SIGTERM handler.\n");
exit(EXIT_FAILURE);
}
if (become_daemon) {
becomeDaemon();
}
if (pidfile != NULL) {
writePID(pidfile);
free(pidfile);
pidfile = NULL;
}
if (!config_loaded) {
loadConfig(&config, DEFAULT_CONFIG);
}
monitor(&config);
exit(EXIT_SUCCESS);
}
int
main(int argc, char *argv[])
{
int lfd, cfd; /* Listening and connected sockets */
struct sigaction sa;
/* The "-i" option means we were invoked from inetd(8), so that
all we need to do is handle the connection on STDIN_FILENO */
if (argc > 1 && strcmp(argv[1], "-i") == 0) {
handleRequest(STDIN_FILENO);
exit(EXIT_SUCCESS);
}
if (becomeDaemon(0) == -1)
errExit("becomeDaemon");
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sa.sa_handler = grimReaper;
if (sigaction(SIGCHLD, &sa, NULL) == -1) {
syslog(LOG_ERR, "Error from sigaction(): %s", strerror(errno));
exit(EXIT_FAILURE);
}
lfd = inetListen(SERVICE, 10, NULL);
if (lfd == -1) {
syslog(LOG_ERR, "Could not create server socket (%s)", strerror(errno));
exit(EXIT_FAILURE);
}
for (;;) {
cfd = accept(lfd, NULL, 0); /* Wait for connection */
if (cfd == -1) {
syslog(LOG_ERR, "Failure in accept(): %s",
strerror(errno));
continue; /* Try next */
}
switch (fork()) { /* Create child for each client */
case -1:
syslog(LOG_ERR, "Can't create child (%s)",
strerror(errno));
close(cfd); /* Give up on this client */
break; /* May be temporary; try next client */
case 0: /* Child */
close(lfd); /* Don't need copy of listening socket */
handleRequest(cfd);
_exit(EXIT_SUCCESS);
default: /* Parent */
close(cfd); /* Don't need copy of connected socket */
break; /* Loop to accept next connection */
}
}
}
int
main(int argc, char *argv[])
{
becomeDaemon(0);
/* Normally a daemon would live forever; we just sleep for a while */
sleep((argc > 1) ? getInt(argv[1], GN_GT_0, "sleep-time") : 20);
exit(EXIT_SUCCESS);
}
int
main(int argc, char *argv[])
{
int lfd, cfd; /* Listening and connected sockets */
struct sigaction sa;
if (becomeDaemon(0) == -1)
errExit("becomeDaemon");
/* Establish SIGCHLD handler to reap terminated child processes */
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sa.sa_handler = grimReaper;
if (sigaction(SIGCHLD, &sa, NULL) == -1) {
syslog(LOG_ERR, "Error from sigaction(): %s", strerror(errno));
exit(EXIT_FAILURE);
}
lfd = inetListen(SERVICE, 10, NULL);
if (lfd == -1) {
syslog(LOG_ERR, "Could not create server socket (%s)", strerror(errno));
exit(EXIT_FAILURE);
}
for (;;) {
cfd = accept(lfd, NULL, NULL); /* Wait for connection */
if (cfd == -1) {
syslog(LOG_ERR, "Failure in accept(): %s", strerror(errno));
exit(EXIT_FAILURE);
}
/* Handle each client request in a new child process */
switch (fork()) {
case -1:
syslog(LOG_ERR, "Can't create child (%s)", strerror(errno));
close(cfd); /* Give up on this client */
break; /* May be temporary; try next client */
case 0: /* Child */
close(lfd); /* Unneeded copy of listening socket */
handleRequest(cfd);
_exit(EXIT_SUCCESS);
default: /* Parent */
close(cfd); /* Unneeded copy of connected socket */
break; /* Loop to accept next connection */
}
}
}
int main( int argc, char *argv[] )
{
#if 0
if ( argc != 3 ){
fprintf ( stderr, "usage: $ %s <device> <text>\n", argv[0] );
fprintf ( stderr, "\t like: $ %s /dev/ttyS0 \"this content will show on termial of /dev/ttyS0\"\n", argv[0]);
exit(219);
}
#else
if ( argc < 2 ){
fprintf ( stderr, "usage: $ %s <TTY device> [option...]\n", argv[0] );
fprintf ( stderr, "\t like: $ %s /dev/ttyS0\n", argv[0]);
fprintf ( stderr, "\n\t [Option...]: Enter the path which is CGIDebugLogd.py file exist on. \n"
"\t this program will default open CGIDebugLogd.py on the same PATH with \"%s\"! \n\n", argv[0]);
exit(CMD_ERR);
}
#endif
char *ptr=NULL;
size_t size;
ptr = path_alloc(&size); /* APUE funciton. */
if (getcwd(ptr, size) == NULL){
fprintf ( stderr, "getcwd() failed!\n");
exit(BUILDIN_FUNC_ERR);
}
if (doDebug){
fprintf (stdout, "cwd = %s\n", /*current work path*/ptr);
}
char PathArray[256] = {'\0'};
snprintf(PathArray, 256, "%s", argv[0] );
getCMDPath(PathArray, 256);
char absolutePath[512] = {'\0'};
snprintf(absolutePath, 512, "%s%s", ptr, PathArray );
free(ptr);
becomeDaemon(0);
//run(argc, argv);
run(argc, argv, absolutePath);
exit(0);
}
int
main(int argc, char *argv[])
{
const int SLEEP_TIME = 15; /* Time to sleep between messages */
int count = 0; /* Number of completed SLEEP_TIME intervals */
int unslept; /* Time remaining in sleep interval */
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sa.sa_handler = sighupHandler;
if (sigaction(SIGHUP, &sa, NULL) == -1)
errExit("sigaction");
if (becomeDaemon(0) == -1)
errExit("becomeDaemon");
logOpen(LOG_FILE);
readConfigFile(CONFIG_FILE);
unslept = SLEEP_TIME;
for (;;) {
unslept = sleep(unslept); /* Returns > 0 if interrupted */
if (hupReceived) { /* If we got SIGHUP... */
hupReceived = 0; /* Get ready for next SIGHUP */
logClose();
logOpen(LOG_FILE);
readConfigFile(CONFIG_FILE);
}
if (unslept == 0) { /* On completed interval */
count++;
logMessage("Main: %d", count);
unslept = SLEEP_TIME; /* Reset interval */
}
}
}
int main(int argc, char* argv[]){
const int SLEEP_TIME=15;
int count=0;
int unslept;
struct sigaction sa;
sigemptyset(&sa.sa_mask);
//sa.sa_flags=SA_RESTART;
sa.sa_flags=SA_NOCLDSTOP;
sa.sa_handler=sighupHandler;
if(sigaction(SIGHUP,&sa,NULL)==-1){
perror("error sigation");
}
if(becomeDaemon(0)==-1){
perror("error becomeDaemon");
}
logOpen(LOG_FILE);
readConfigFile(CONFIG_FILE);
unslept=SLEEP_TIME;
for(;;){
unslept=sleep(unslept);
if(hupReceived){
hupReceived=0;
logClose();
logOpen(LOG_FILE);
readConfigFile(CONFIG_FILE);
}
if(unslept==0){
count++;
logMessage("Main: %d", count);
unslept=SLEEP_TIME;
}
}
return 0;
}
int
main(int argc, char *argv[])
{
int sfd;
ssize_t numRead;
socklen_t len;
struct sockaddr_storage claddr;
char buf[BUF_SIZE];
char addrStr[IS_ADDR_STR_LEN];
if (becomeDaemon(0) == -1)
errExit("becomeDaemon");
sfd = inetBind(SERVICE, SOCK_DGRAM, NULL);
if (sfd == -1) {
syslog(LOG_ERR, "Could not create server socket (%s)", strerror(errno));
exit(EXIT_FAILURE);
}
/* Receive datagrams and return copies to senders */
for (;;) {
len = sizeof(struct sockaddr_storage);
numRead = recvfrom(sfd, buf, BUF_SIZE, 0,
(struct sockaddr *) &claddr, &len);
if (numRead == -1)
errExit("recvfrom");
if (sendto(sfd, buf, numRead, 0, (struct sockaddr *) &claddr, len)
!= numRead)
syslog(LOG_WARNING, "Error echoing response to %s (%s)",
inetAddressStr((struct sockaddr *) &claddr, len,
addrStr, IS_ADDR_STR_LEN),
strerror(errno));
}
}
/*
This function is used to ensure that there is a URI server associated with the IPC directory that is being used. It does this by checking if one exists (in which case it returns its address) and creating a new one if there isn't one already.
@param inputPathForMessagingDirectory: The path to the directory that the IPC files for ZeroMQ will be created in
@return: The IPC address of the server process
@exception: This function will throw exceptions if the directory is invalid, a fork call fails, a memory allocation fails or a file operation fails.
*/
std::string localURIEngine::ensureDirectoryURIServerSingletonIsRunningAndGetAddress(const std::string &inputPathForMessagingDirectory)
{
//See if there is a server going already and start one if there is not
//Check if there is an existing localURIServer
uint64_t existingSingletonID;
if(checkForExistingURISingletonsAndCleanUpSingletonIPCFiles (inputPathForMessagingDirectory, &existingSingletonID))
{
//A singleton exists, so return its IPC path
return std::string(URI_SERVER_SINGLETON_IPC_FORMAT) + std::to_string(existingSingletonID);
}
//No singleton exists, so spawn one (might replace this with a simple system call)
pid_t forkResult = fork();
if(forkResult == -1)
{
throw SOMException(std::string("Error forking to create database singleton\n"), FORK_ERROR, __FILE__, __LINE__);
}
if(forkResult == 0)
{
//We are in the child process
//Make a singleton
try
{
if(becomeDaemon() != 1)
{
_exit(0);
}
//Make singleton object
localURIServerSingleton databaseSingleton(inputPathForMessagingDirectory);
//Process requests forever
databaseSingleton.processRequests();
_exit(0);
}
catch(std::exception &inputException)
{
//Swallow any exceptions and exit to make sure child process doesn't call destructor the parent's ZMQ resources
//fprintf(stderr, "Attempt to start database singleton failed: %s\n", inputException.what());
_exit(0); //Return successfully
}
}
//Wait for up to a certain amount of time in increments of 100 milliseconds for a database server singleton to start
uint64_t singletonID;
bool foundSingleton=false;
for(int i=0; i<HOW_LONG_TO_WAIT_FOR_DATABASE_SERVER_IN_MILLISECONDS; i+=100)
{
if(checkForExistingURISingletonsAndCleanUpSingletonIPCFiles(inputPathForMessagingDirectory, &singletonID))
{
foundSingleton = true;
break;
}
if(usleep(100*1000)!=0)
{
throw SOMException(std::string("Error occurred attempting to sleep\n"), SYSTEM_ERROR, __FILE__, __LINE__);
}
}
if(!foundSingleton)
{
throw SOMException(std::string("Attempt to start singleton failed\n"), SYSTEM_ERROR, __FILE__, __LINE__);
}
//A singleton exists, so return it
return std::string(URI_SERVER_SINGLETON_IPC_FORMAT) + std::to_string(singletonID);
}
int
main(int argc, char **argv)
{
int oldpid, oldumask, fd, parentPid;
char *pt, *errorLogFile, **opts;
/* make sure at least world write access is disabled */
if (((oldumask = umask(022)) & 002) == 002)
(void)umask(oldumask);
/* give /dev/null as stdin */
if ((fd = open("/dev/null", O_RDONLY)) > 0) {
dup2(fd, 0);
close(fd);
}
if (fcntl(1, F_GETFD) < 0)
dup2(0, 1);
if (fcntl(2, F_GETFD) < 0)
dup2(0, 2);
#ifndef nowMonotonic
nowMonotonic = sysconf(_SC_MONOTONIC_CLOCK) >= 200112L;
#endif
#if KDM_LIBEXEC_STRIP == -1
prog = strrchr(argv[0], '/');
progname = prog = prog ? prog + 1 : argv[0];
#else
if (argv[0][0] == '/') {
if (!strDup(&progpath, argv[0]))
panic("Out of memory");
} else
# ifdef __linux__
{
/* note that this will resolve symlinks ... */
int len;
char fullpath[PATH_MAX];
if ((len = readlink("/proc/self/exe", fullpath, sizeof(fullpath))) < 0)
panic("Invoke with full path specification or mount /proc");
if (!strNDup(&progpath, fullpath, len))
panic("Out of memory");
}
# else
# if 0
panic("Must be invoked with full path specification");
# else
{
char directory[PATH_MAX+1];
if (!getcwd(directory, sizeof(directory)))
panic("Can't find myself (getcwd failed)");
if (strchr(argv[0], '/')) {
strApp(&progpath, directory, "/", argv[0], (char *)0);
} else {
int len;
char *path, *pathe, *name, *thenam, nambuf[PATH_MAX+1];
if (!(path = getenv("PATH")))
panic("Can't find myself (no PATH)");
len = strlen(argv[0]);
name = nambuf + PATH_MAX - len;
memcpy(name, argv[0], len + 1);
*--name = '/';
do {
if (!(pathe = strchr(path, ':')))
pathe = path + strlen(path);
len = pathe - path;
if (!len || (len == 1 && *path == '.')) {
len = strlen(directory);
path = directory;
}
thenam = name - len;
if (thenam >= nambuf) {
memcpy(thenam, path, len);
if (!access(thenam, X_OK))
goto found;
}
path = pathe;
} while (*path++ != '\0');
panic("Can't find myself (not in PATH)");
found:
if (!strDup(&progpath, thenam))
panic("Out of memory");
}
}
# endif
# endif
prog = strrchr(progpath, '/') + 1;
# if KDM_LIBEXEC_STRIP
for (progname = pt = prog, fd = 0; fd < KDM_LIBEXEC_STRIP + 1; fd++) {
for (;;) {
pt--;
if (pt == progpath)
panic("Executable is obviously located outside BINDIR");
if (*pt == '/')
break;
}
}
*pt = 0;
# endif
#endif
#if !defined(HAVE_SETPROCTITLE) && !defined(NOXDMTITLE)
title = argv[0];
titleLen = (argv[argc - 1] + strlen(argv[argc - 1])) - title;
#endif
/*
* Parse command line options
*/
parentPid = getppid();
errorLogFile = 0;
if (!(opts = Malloc(2 * sizeof(char *))))
return 1;
opts[0] = (char *)"";
opts[1] = 0;
while (*++argv) {
if (**argv != '-')
break;
pt = *argv + 1;
if (*pt == '-')
pt++;
if (!strcmp(pt, "help") || !strcmp(pt, "h")) {
printf("Usage: %s [options] [tty]\n"
" -daemon\t - Daemonize even when started by init\n"
" -nodaemon\t - Do not daemonize even when started from command line\n"
" -config <file> - Use alternative master configuration file\n"
" -xrm <res>\t - Override frontend-specific resource\n"
" -error <file>\t - Use alternative log file\n"
" -debug <num>\t - Debug option bitfield:\n"
"\t\t\t0x1 - core log\n"
"\t\t\t0x2 - config reader log\n"
"\t\t\t0x4 - greeter log\n"
"\t\t\t0x8 - IPC log\n"
"\t\t\t0x10 - session sub-daemon post-fork delay\n"
"\t\t\t0x20 - config reader post-start delay\n"
"\t\t\t0x40 - greeter post-start delay\n"
"\t\t\t0x80 - do not use syslog\n"
"\t\t\t0x100 - core Xauth log\n"
"\t\t\t0x200 - debug greeter theming\n"
"\t\t\t0x400 - valgrind config reader and greeter\n"
"\t\t\t0x800 - strace config reader and greeter\n"
, prog);
exit(0);
} else if (!strcmp(pt, "daemon")) {
parentPid = 0;
} else if (!strcmp(pt, "nodaemon")) {
parentPid = 1;
} else if (argv[1] && !strcmp(pt, "config")) {
strDup(opts, *++argv);
} else if (argv[1] && !strcmp(pt, "xrm")) {
opts = addStrArr(opts, *++argv, -1);
} else if (argv[1] && !strcmp(pt, "debug")) {
sscanf(*++argv, "%i", &debugLevel);
} else if (argv[1] && (!strcmp(pt, "error") || !strcmp(pt, "logfile"))) {
errorLogFile = *++argv;
} else {
fprintf(stderr, "\"%s\" is an unknown option or is missing a parameter\n", *argv);
exit(1);
}
}
/*
* Only allow root to run in non-debug mode to avoid problems
*/
if (!debugLevel && getuid()) {
fprintf(stderr, "Only root wants to run %s\n", prog);
exit(1);
}
initErrorLog(errorLogFile);
if (parentPid != 1)
becomeDaemon();
/*
* Step 1 - load configuration parameters
*/
if (!initResources(opts) || scanConfigs(False) < 0)
logPanic("Config reader failed. Aborting ...\n");
/* SUPPRESS 560 */
if ((oldpid = storePid())) {
if (oldpid == -1)
logError("Cannot create/lock pid file %s\n", pidFile);
else
logError("Cannot lock pid file %s, another xdm is running (pid %d)\n",
pidFile, oldpid);
exit(1);
}
#ifdef NEED_ENTROPY
addOtherEntropy();
#endif
/*
* We used to clean up old authorization files here. As authDir is
* supposed to be /var/run/xauth or /tmp, we needn't to care for it.
*/
#ifdef XDMCP
initXdmcp();
#else
debug("not compiled for XDMCP\n");
#endif
if (pipe(signalFds))
logPanic("Unable to create signal notification pipe.\n");
registerInput(signalFds[0]);
registerCloseOnFork(signalFds[0]);
registerCloseOnFork(signalFds[1]);
(void)Signal(SIGTERM, sigHandler);
(void)Signal(SIGINT, sigHandler);
(void)Signal(SIGHUP, sigHandler);
(void)Signal(SIGCHLD, sigHandler);
(void)Signal(SIGUSR1, sigHandler);
/*
* Step 2 - run a sub-daemon for each entry
*/
openCtrl(0);
#ifdef XDMCP
updateListenSockets();
#endif
mainLoop();
closeCtrl(0);
if (sdRec.how) {
int pid;
commitBootOption();
if (Fork(&pid) <= 0) {
char *cmd = sdRec.how == SHUT_HALT ? cmdHalt : cmdReboot;
execute(parseArgs((char **)0, cmd), (char **)0);
logError("Failed to execute shutdown command %\"s\n", cmd);
exit(1);
} else {
sigset_t mask;
sigemptyset(&mask);
sigaddset(&mask, SIGCHLD);
sigaddset(&mask, SIGHUP);
sigsuspend(&mask);
}
}
debug("nothing left to do, exiting\n");
return 0;
}
