/**
* Reload the server configuration file.
*/
static void
Rehash(void)
{
char old_name[CLIENT_ID_LEN];
unsigned old_nicklen;
Log( LOG_NOTICE|LOG_snotice, "Re-reading configuration NOW!" );
/* Remember old server name and nickname length */
strlcpy( old_name, Conf_ServerName, sizeof old_name );
old_nicklen = Conf_MaxNickLength;
/* Re-read configuration ... */
if (!Conf_Rehash( ))
return;
/* Close down all listening sockets */
Conn_ExitListeners( );
/* Recover old server name and nickname length: these values can't
* be changed during run-time */
if (strcmp(old_name, Conf_ServerName) != 0 ) {
strlcpy(Conf_ServerName, old_name, sizeof Conf_ServerName);
Log(LOG_ERR,
"Can't change \"ServerName\" on runtime! Ignored new name.");
}
if (old_nicklen != Conf_MaxNickLength) {
Conf_MaxNickLength = old_nicklen;
Log(LOG_ERR,
"Can't change \"MaxNickLength\" on runtime! Ignored new value.");
}
/* Create new pre-defined channels */
Channel_InitPredefined( );
if (!ConnSSL_InitLibrary())
Log(LOG_WARNING,
"Re-Initializing of SSL failed, using old keys!");
/* Start listening on sockets */
Conn_InitListeners( );
/* Sync configuration with established connections */
Conn_SyncServerStruct( );
Log( LOG_NOTICE|LOG_snotice, "Re-reading of configuration done." );
} /* Rehash */
/**
* Initialize ngIRCd daemon.
*
* @param NGIRCd_NoDaemon Set to true if ngIRCd should run in the
* foreground (and not as a daemon).
* @return true on success.
*/
static bool
NGIRCd_Init(bool NGIRCd_NoDaemon)
{
static bool initialized;
bool chrooted = false;
struct passwd *pwd;
struct group *grp;
int real_errno, fd = -1;
pid_t pid;
if (initialized)
return true;
if (!NGIRCd_NoDaemon) {
/* open /dev/null before chroot() */
fd = open( "/dev/null", O_RDWR);
if (fd < 0)
Log(LOG_WARNING, "Could not open /dev/null: %s",
strerror(errno));
}
/* SSL initialization */
if (!ConnSSL_InitLibrary())
Log(LOG_WARNING,
"Warning: Error during SSL initialization, continuing ...");
/* Change root */
if (Conf_Chroot[0]) {
if (chdir(Conf_Chroot) != 0) {
Log(LOG_ERR, "Can't chdir() in ChrootDir (%s): %s",
Conf_Chroot, strerror(errno));
goto out;
}
if (chroot(Conf_Chroot) != 0) {
Log(LOG_ERR,
"Can't change root directory to \"%s\": %s",
Conf_Chroot, strerror(errno));
goto out;
} else {
chrooted = true;
Log(LOG_INFO,
"Changed root and working directory to \"%s\".",
Conf_Chroot);
}
}
/* Check user ID */
if (Conf_UID == 0) {
pwd = getpwuid(0);
Log(LOG_INFO,
"ServerUID must not be %s(0), using \"nobody\" instead.",
pwd ? pwd->pw_name : "?");
if (!NGIRCd_getNobodyID(&Conf_UID, &Conf_GID)) {
Log(LOG_WARNING,
"Could not get user/group ID of user \"nobody\": %s",
errno ? strerror(errno) : "not found" );
goto out;
}
}
/* Change group ID */
if (getgid() != Conf_GID) {
if (setgid(Conf_GID) != 0) {
real_errno = errno;
grp = getgrgid(Conf_GID);
Log(LOG_ERR, "Can't change group ID to %s(%u): %s",
grp ? grp->gr_name : "?", Conf_GID,
strerror(errno));
if (real_errno != EPERM)
goto out;
}
}
/* Change user ID */
if (getuid() != Conf_UID) {
if (setuid(Conf_UID) != 0) {
real_errno = errno;
pwd = getpwuid(Conf_UID);
Log(LOG_ERR, "Can't change user ID to %s(%u): %s",
pwd ? pwd->pw_name : "?", Conf_UID,
strerror(errno));
if (real_errno != EPERM)
goto out;
}
}
initialized = true;
/* Normally a child process is forked which isn't any longer
* connected to ther controlling terminal. Use "--nodaemon"
* to disable this "daemon mode" (useful for debugging). */
if (!NGIRCd_NoDaemon) {
pid = fork();
if (pid > 0) {
/* "Old" process: exit. */
exit(0);
}
if (pid < 0) {
/* Error!? */
fprintf(stderr,
"%s: Can't fork: %s!\nFatal error, exiting now ...\n",
PACKAGE_NAME, strerror(errno));
exit(1);
}
/* New child process */
#ifndef NeXT
(void)setsid();
#else
setpgrp(0, getpid());
#endif
if (chdir("/") != 0)
Log(LOG_ERR, "Can't change directory to '/': %s",
strerror(errno));
/* Detach stdin, stdout and stderr */
Setup_FDStreams(fd);
if (fd > 2)
close(fd);
}
pid = getpid();
Pidfile_Create(pid);
/* Check UID/GID we are running as, can be different from values
* configured (e. g. if we were already started with a UID>0. */
Conf_UID = getuid();
Conf_GID = getgid();
pwd = getpwuid(Conf_UID);
grp = getgrgid(Conf_GID);
Log(LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.",
pwd ? pwd->pw_name : "unknown", (long)Conf_UID,
grp ? grp->gr_name : "unknown", (long)Conf_GID, (long)pid);
if (chrooted) {
Log(LOG_INFO, "Running with root directory \"%s\".",
Conf_Chroot );
return true;
} else
Log(LOG_INFO, "Not running with changed root directory.");
/* Change working directory to home directory of the user we are
* running as (only when running in daemon mode and not in chroot) */
if (NGIRCd_NoDaemon)
return true;
if (pwd) {
if (chdir(pwd->pw_dir) == 0)
Log(LOG_DEBUG,
"Changed working directory to \"%s\" ...",
pwd->pw_dir);
else
Log(LOG_INFO,
"Notice: Can't change working directory to \"%s\": %s",
pwd->pw_dir, strerror(errno));
} else
Log(LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID);
return true;
out:
if (fd > 2)
close(fd);
return false;
} /* NGIRCd_Init */
