/* Try to restore priv to the effective set.
Returns 0 if priv was re-added to the effective set (after being previously
removed by a call to priv_set_remove).
Returns -1 on error with errno set appropriately. */
int
priv_set_restore (const char *priv)
{
if (! initialized && priv_set_initialize () != 0)
return -1;
if (priv_ismember (rem_set, priv))
{
/* priv_addset/priv_delset can only fail if priv is invalid, which is
checked above by the priv_ismember call. */
priv_addset (eff_set, priv);
if (setppriv (PRIV_SET, PRIV_EFFECTIVE, eff_set) != 0)
{
priv_delset (eff_set, priv);
return -1;
}
priv_delset (rem_set, priv);
}
else
{
errno = EINVAL;
return -1;
}
return 0;
}
/*
* this section of code will drop all (Solaris) privileges including
* those normally granted to all userland process (basic privileges). The
* effect of this is that after running this code, the process will not able
* to fork(), exec(), etc. See privileges(5) for more information.
*/
void drop_privileges(void) {
priv_set_t *privs = priv_str_to_set("basic", ",", NULL);
if (privs == NULL) {
perror("priv_str_to_set");
exit(EXIT_FAILURE);
}
(void)priv_delset(privs, PRIV_FILE_LINK_ANY);
(void)priv_delset(privs, PRIV_PROC_EXEC);
(void)priv_delset(privs, PRIV_PROC_FORK);
(void)priv_delset(privs, PRIV_PROC_INFO);
(void)priv_delset(privs, PRIV_PROC_SESSION);
if (setppriv(PRIV_SET, PRIV_PERMITTED, privs) != 0) {
perror("setppriv(PRIV_SET, PRIV_PERMITTED)");
exit(EXIT_FAILURE);
}
priv_emptyset(privs);
if (setppriv(PRIV_SET, PRIV_INHERITABLE, privs) != 0) {
perror("setppriv(PRIV_SET, PRIV_INHERITABLE)");
exit(EXIT_FAILURE);
}
if (setppriv(PRIV_SET, PRIV_LIMIT, privs) != 0) {
perror("setppriv(PRIV_SET, PRIV_LIMIT)");
exit(EXIT_FAILURE);
}
priv_freeset(privs);
}
void
solaris_drop_privs_root_pinfo_net_exec(void)
{
priv_set_t *pset = NULL;
if ((pset = priv_allocset()) == NULL)
fatal("priv_allocset: %s", strerror(errno));
/* Start with "basic" and drop everything we don't need. */
priv_basicset(pset);
if (priv_delset(pset, PRIV_FILE_LINK_ANY) != 0 ||
priv_delset(pset, PRIV_NET_ACCESS) != 0 ||
priv_delset(pset, PRIV_PROC_EXEC) != 0 ||
priv_delset(pset, PRIV_PROC_INFO) != 0 ||
priv_delset(pset, PRIV_PROC_SESSION) != 0)
fatal("priv_delset: %s", strerror(errno));
if (setppriv(PRIV_SET, PRIV_PERMITTED, pset) != 0 ||
setppriv(PRIV_SET, PRIV_LIMIT, pset) != 0 ||
setppriv(PRIV_SET, PRIV_INHERITABLE, pset) != 0)
fatal("setppriv: %s", strerror(errno));
priv_freeset(pset);
}
static void
drop_privileges ()
{
priv_set_t *pPrivSet = NULL;
priv_set_t *lPrivSet = NULL;
/*
* Start with the 'basic' privilege set and then remove any
* of the 'basic' privileges that will not be needed.
*/
if ((pPrivSet = priv_str_to_set("basic", ",", NULL)) == NULL) {
return;
}
/* Clear privileges we will not need from the 'basic' set */
(void) priv_delset(pPrivSet, PRIV_FILE_LINK_ANY);
(void) priv_delset(pPrivSet, PRIV_PROC_INFO);
(void) priv_delset(pPrivSet, PRIV_PROC_SESSION);
(void) priv_delset(pPrivSet, PRIV_PROC_EXEC);
(void) priv_delset(pPrivSet, PRIV_PROC_FORK);
/* for uscsi */
(void) priv_addset(pPrivSet, PRIV_SYS_DEVICES);
/* to open logindevperm'd devices */
(void) priv_addset(pPrivSet, PRIV_FILE_DAC_READ);
/* Set the permitted privilege set. */
if (setppriv(PRIV_SET, PRIV_PERMITTED, pPrivSet) != 0) {
return;
}
/* Clear the limit set. */
if ((lPrivSet = priv_allocset()) == NULL) {
return;
}
priv_emptyset(lPrivSet);
if (setppriv(PRIV_SET, PRIV_LIMIT, lPrivSet) != 0) {
return;
}
priv_freeset(lPrivSet);
}
static const char *vhost_cgimode(cmd_parms *cmd, void *dir, const char *arg)
{
priv_cfg *cfg = ap_get_module_config(cmd->server->module_config,
&privileges_module);
if (!strcasecmp(arg, "on")) {
/* default - nothing to do */
}
else if (!strcasecmp(arg, "off")) {
/* drop fork+exec privs */
CFG_CHECK(priv_delset(cfg->priv, PRIV_PROC_FORK));
CFG_CHECK(priv_delset(cfg->priv, PRIV_PROC_EXEC));
}
else if (!strcasecmp(arg, "secure")) {
/* deny privileges to CGI procs */
CFG_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_FORK));
CFG_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_EXEC));
CFG_CHECK(priv_delset(cfg->child_priv, PRIV_FILE_LINK_ANY));
CFG_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_INFO));
CFG_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_SESSION));
}
else {
return "VHostCGIMode must be On, Off or Secure";
}
return NULL;
}
static void
setup_privs()
{
priv_set_t *privset;
if (seteuid(getuid()) == -1 || setegid(getgid()) == -1)
die(gettext("seteuid()/setegid() failed"));
/*
* Add our privileges and remove unneeded 'basic' privileges from the
* permitted set.
*/
if ((privset = priv_str_to_set("basic", ",", NULL)) == NULL)
die(gettext("cannot setup privileges"));
(void) priv_addset(privset, PRIV_SYS_ACCT);
(void) priv_addset(privset, PRIV_FILE_DAC_WRITE);
(void) priv_addset(privset, PRIV_SYS_DL_CONFIG);
(void) priv_delset(privset, PRIV_FILE_LINK_ANY);
(void) priv_delset(privset, PRIV_PROC_EXEC);
(void) priv_delset(privset, PRIV_PROC_FORK);
(void) priv_delset(privset, PRIV_PROC_INFO);
(void) priv_delset(privset, PRIV_PROC_SESSION);
priv_inverse(privset);
if (setppriv(PRIV_OFF, PRIV_PERMITTED, privset) == -1)
die(gettext("cannot setup privileges"));
priv_freeset(privset);
/*
* Clear the Inheritable and Limit sets.
*/
if ((privset = priv_allocset()) == NULL)
die(gettext("cannot setup privileges"));
priv_emptyset(privset);
if (setppriv(PRIV_SET, PRIV_INHERITABLE, privset) == -1 ||
setppriv(PRIV_SET, PRIV_LIMIT, privset) == -1)
die(gettext("cannot setup privileges"));
/*
* Turn off the sys_acct, file_dac_write and dl_config privileges
* until needed.
*/
(void) priv_set(PRIV_OFF, PRIV_EFFECTIVE, PRIV_FILE_DAC_WRITE,
PRIV_SYS_ACCT, PRIV_SYS_DL_CONFIG, NULL);
}
static void *privileges_create_cfg(apr_pool_t *pool, server_rec *s)
{
priv_cfg *cfg = apr_palloc(pool, sizeof(priv_cfg));
/* Start at basic privileges all round. */
cfg->priv = priv_str_to_set("basic", ",", NULL);
cfg->child_priv = priv_str_to_set("basic", ",", NULL);
/* By default, run in secure vhost mode.
* That means dropping basic privileges we don't usually need.
*/
CR_CHECK(priv_delset(cfg->priv, PRIV_FILE_LINK_ANY), APLOGNO(03160));
CR_CHECK(priv_delset(cfg->priv, PRIV_PROC_INFO), APLOGNO(03161));
CR_CHECK(priv_delset(cfg->priv, PRIV_PROC_SESSION), APLOGNO(03162));
/* Hmmm, should CGI default to secure too ? */
/*
CR_CHECK(priv_delset(cfg->child_priv, PRIV_FILE_LINK_ANY), APLOGNO(03163));
CR_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_INFO), APLOGNO(03164));
CR_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_SESSION), APLOGNO(03165));
CR_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_FORK), APLOGNO(03166));
CR_CHECK(priv_delset(cfg->child_priv, PRIV_PROC_EXEC), APLOGNO(03167));
*/
/* we´ll use 0 for unset */
cfg->uid = 0;
cfg->gid = 0;
cfg->mode = PRIV_UNSET;
apr_pool_cleanup_register(pool, cfg, priv_cfg_cleanup,
apr_pool_cleanup_null);
/* top-level default_priv wants the top-level cfg */
if (priv_default == NULL) {
priv_default = cfg->priv;
}
return cfg;
}
void
solaris_drop_privs_pinfo_net_fork_exec(void)
{
priv_set_t *pset = NULL, *npset = NULL;
/*
* Note: this variant avoids dropping DAC filesystem rights, in case
* the process calling it is running as root and should have the
* ability to read/write/chown any file on the system.
*
* We start with the basic set, then *add* the DAC rights to it while
* taking away other parts of BASIC we don't need. Then we intersect
* this with our existing PERMITTED set. In this way we keep any
* DAC rights we had before, while otherwise reducing ourselves to
* the minimum set of privileges we need to proceed.
*
* This also means we drop any other parts of "root" that we don't
* need (e.g. the ability to kill any process, create new device nodes
* etc etc).
*/
if ((pset = priv_allocset()) == NULL ||
(npset = priv_allocset()) == NULL)
fatal("priv_allocset: %s", strerror(errno));
priv_basicset(npset);
if (priv_addset(npset, PRIV_FILE_CHOWN) != 0 ||
priv_addset(npset, PRIV_FILE_DAC_READ) != 0 ||
priv_addset(npset, PRIV_FILE_DAC_SEARCH) != 0 ||
priv_addset(npset, PRIV_FILE_DAC_WRITE) != 0 ||
priv_addset(npset, PRIV_FILE_OWNER) != 0)
fatal("priv_addset: %s", strerror(errno));
if (priv_delset(npset, PRIV_FILE_LINK_ANY) != 0 ||
priv_delset(npset, PRIV_NET_ACCESS) != 0 ||
priv_delset(npset, PRIV_PROC_EXEC) != 0 ||
priv_delset(npset, PRIV_PROC_FORK) != 0 ||
priv_delset(npset, PRIV_PROC_INFO) != 0 ||
priv_delset(npset, PRIV_PROC_SESSION) != 0)
fatal("priv_delset: %s", strerror(errno));
if (getppriv(PRIV_PERMITTED, pset) != 0)
fatal("getppriv: %s", strerror(errno));
priv_intersect(pset, npset);
if (setppriv(PRIV_SET, PRIV_PERMITTED, npset) != 0 ||
setppriv(PRIV_SET, PRIV_LIMIT, npset) != 0 ||
setppriv(PRIV_SET, PRIV_INHERITABLE, npset) != 0)
fatal("setppriv: %s", strerror(errno));
priv_freeset(pset);
priv_freeset(npset);
}
static const char *vhost_cgiprivs(cmd_parms *cmd, void *dir, const char *arg)
{
priv_cfg *cfg = ap_get_module_config(cmd->server->module_config,
&privileges_module);
const char *priv = arg;
if (*priv == '-') {
CFG_CHECK(priv_delset(cfg->child_priv, priv+1));
}
else if (*priv == '+') {
CFG_CHECK(priv_addset(cfg->child_priv, priv+1));
}
else {
priv_emptyset(cfg->child_priv);
CFG_CHECK(priv_addset(cfg->child_priv, priv));
}
return NULL;
}
void
drop_privs(void)
{
priv_set_t *pPrivSet = NULL;
priv_set_t *lPrivSet = NULL;
if ((pPrivSet = priv_str_to_set("basic", ",", NULL)) == NULL) {
(void) fprintf(stderr, "Unable to get 'basic' privset\n");
exit(EXIT_FAILURE);
}
/* Drop any privs out of the basic set that we won't need */
(void) priv_delset(pPrivSet, PRIV_FILE_LINK_ANY);
(void) priv_delset(pPrivSet, PRIV_PROC_INFO);
(void) priv_delset(pPrivSet, PRIV_PROC_SESSION);
(void) priv_delset(pPrivSet, PRIV_PROC_FORK);
(void) priv_delset(pPrivSet, PRIV_PROC_EXEC);
(void) priv_delset(pPrivSet, PRIV_FILE_WRITE);
/* Set permitted set */
if (setppriv(PRIV_SET, PRIV_PERMITTED, pPrivSet) != 0) {
(void) fprintf(stderr, "Unable to drop privs\n");
exit(EXIT_FAILURE);
}
/* clear limit set */
if ((lPrivSet = priv_allocset()) == NULL) {
(void) fprintf(stderr, "Unable to allocate privset\n");
exit(EXIT_FAILURE);
}
priv_emptyset(lPrivSet);
if (setppriv(PRIV_SET, PRIV_LIMIT, lPrivSet) != 0) {
(void) fprintf(stderr, "Unable to set limit set\n");
exit(EXIT_FAILURE);
}
priv_freeset(lPrivSet);
priv_freeset(pPrivSet);
}
int
ntpdmain(
int argc,
char *argv[]
)
{
l_fp now;
struct recvbuf *rbuf;
const char * logfilename;
# ifdef HAVE_UMASK
mode_t uv;
# endif
# if defined(HAVE_GETUID) && !defined(MPE) /* MPE lacks the concept of root */
uid_t uid;
# endif
# if defined(HAVE_WORKING_FORK)
long wait_sync = 0;
int pipe_fds[2];
int rc;
int exit_code;
# ifdef _AIX
struct sigaction sa;
# endif
# if !defined(HAVE_SETSID) && !defined (HAVE_SETPGID) && defined(TIOCNOTTY)
int fid;
# endif
# endif /* HAVE_WORKING_FORK*/
# ifdef SCO5_CLOCK
int fd;
int zero;
# endif
# ifdef NEED_PTHREAD_WARMUP
my_pthread_warmup();
# endif
# ifdef HAVE_UMASK
uv = umask(0);
if (uv)
umask(uv);
else
umask(022);
# endif
saved_argc = argc;
saved_argv = argv;
progname = argv[0];
initializing = TRUE; /* mark that we are initializing */
parse_cmdline_opts(&argc, &argv);
# ifdef DEBUG
debug = OPT_VALUE_SET_DEBUG_LEVEL;
# ifdef HAVE_SETLINEBUF
setlinebuf(stdout);
# endif
# endif
if (HAVE_OPT(NOFORK) || HAVE_OPT(QUIT)
# ifdef DEBUG
|| debug
# endif
|| HAVE_OPT(SAVECONFIGQUIT))
nofork = TRUE;
init_logging(progname, NLOG_SYNCMASK, TRUE);
/* honor -l/--logfile option to log to a file */
if (HAVE_OPT(LOGFILE)) {
logfilename = OPT_ARG(LOGFILE);
syslogit = FALSE;
change_logfile(logfilename, FALSE);
} else {
logfilename = NULL;
if (nofork)
msyslog_term = TRUE;
if (HAVE_OPT(SAVECONFIGQUIT))
syslogit = FALSE;
}
msyslog(LOG_NOTICE, "%s: Starting", Version);
{
int i;
char buf[1024]; /* Secret knowledge of msyslog buf length */
char *cp = buf;
/* Note that every arg has an initial space character */
snprintf(cp, sizeof(buf), "Command line:");
cp += strlen(cp);
for (i = 0; i < saved_argc ; ++i) {
snprintf(cp, sizeof(buf) - (cp - buf),
" %s", saved_argv[i]);
cp += strlen(cp);
}
msyslog(LOG_INFO, "%s", buf);
}
/*
* Install trap handlers to log errors and assertion failures.
* Default handlers print to stderr which doesn't work if detached.
*/
isc_assertion_setcallback(assertion_failed);
isc_error_setfatal(library_fatal_error);
isc_error_setunexpected(library_unexpected_error);
/* MPE lacks the concept of root */
# if defined(HAVE_GETUID) && !defined(MPE)
uid = getuid();
if (uid && !HAVE_OPT( SAVECONFIGQUIT )) {
msyslog_term = TRUE;
msyslog(LOG_ERR,
"must be run as root, not uid %ld", (long)uid);
exit(1);
}
# endif
/*
* Enable the Multi-Media Timer for Windows?
*/
# ifdef SYS_WINNT
if (HAVE_OPT( MODIFYMMTIMER ))
set_mm_timer(MM_TIMER_HIRES);
# endif
#ifdef HAVE_DNSREGISTRATION
/*
* Enable mDNS registrations?
*/
if (HAVE_OPT( MDNS )) {
mdnsreg = TRUE;
}
#endif /* HAVE_DNSREGISTRATION */
if (HAVE_OPT( NOVIRTUALIPS ))
listen_to_virtual_ips = 0;
/*
* --interface, listen on specified interfaces
*/
if (HAVE_OPT( INTERFACE )) {
int ifacect = STACKCT_OPT( INTERFACE );
const char** ifaces = STACKLST_OPT( INTERFACE );
sockaddr_u addr;
while (ifacect-- > 0) {
add_nic_rule(
is_ip_address(*ifaces, AF_UNSPEC, &addr)
? MATCH_IFADDR
: MATCH_IFNAME,
*ifaces, -1, ACTION_LISTEN);
ifaces++;
}
}
if (HAVE_OPT( NICE ))
priority_done = 0;
# ifdef HAVE_SCHED_SETSCHEDULER
if (HAVE_OPT( PRIORITY )) {
config_priority = OPT_VALUE_PRIORITY;
config_priority_override = 1;
priority_done = 0;
}
# endif
# ifdef HAVE_WORKING_FORK
/* make sure the FDs are initialised */
pipe_fds[0] = -1;
pipe_fds[1] = -1;
do { /* 'loop' once */
if (!HAVE_OPT( WAIT_SYNC ))
break;
wait_sync = OPT_VALUE_WAIT_SYNC;
if (wait_sync <= 0) {
wait_sync = 0;
break;
}
/* -w requires a fork() even with debug > 0 */
nofork = FALSE;
if (pipe(pipe_fds)) {
exit_code = (errno) ? errno : -1;
msyslog(LOG_ERR,
"Pipe creation failed for --wait-sync: %m");
exit(exit_code);
}
waitsync_fd_to_close = pipe_fds[1];
} while (0); /* 'loop' once */
# endif /* HAVE_WORKING_FORK */
init_lib();
# ifdef SYS_WINNT
/*
* Start interpolation thread, must occur before first
* get_systime()
*/
init_winnt_time();
# endif
/*
* Initialize random generator and public key pair
*/
get_systime(&now);
ntp_srandom((int)(now.l_i * now.l_uf));
/*
* Detach us from the terminal. May need an #ifndef GIZMO.
*/
if (!nofork) {
# ifdef HAVE_WORKING_FORK
rc = fork();
if (-1 == rc) {
exit_code = (errno) ? errno : -1;
msyslog(LOG_ERR, "fork: %m");
exit(exit_code);
}
if (rc > 0) {
/* parent */
exit_code = wait_child_sync_if(pipe_fds[0],
wait_sync);
exit(exit_code);
}
/*
* child/daemon
* close all open files excepting waitsync_fd_to_close.
* msyslog() unreliable until after init_logging().
*/
closelog();
if (syslog_file != NULL) {
fclose(syslog_file);
syslog_file = NULL;
syslogit = TRUE;
}
close_all_except(waitsync_fd_to_close);
INSIST(0 == open("/dev/null", 0) && 1 == dup2(0, 1) \
&& 2 == dup2(0, 2));
init_logging(progname, 0, TRUE);
/* we lost our logfile (if any) daemonizing */
setup_logfile(logfilename);
# ifdef SYS_DOMAINOS
{
uid_$t puid;
status_$t st;
proc2_$who_am_i(&puid);
proc2_$make_server(&puid, &st);
}
# endif /* SYS_DOMAINOS */
# ifdef HAVE_SETSID
if (setsid() == (pid_t)-1)
msyslog(LOG_ERR, "setsid(): %m");
# elif defined(HAVE_SETPGID)
if (setpgid(0, 0) == -1)
msyslog(LOG_ERR, "setpgid(): %m");
# else /* !HAVE_SETSID && !HAVE_SETPGID follows */
# ifdef TIOCNOTTY
fid = open("/dev/tty", 2);
if (fid >= 0) {
ioctl(fid, (u_long)TIOCNOTTY, NULL);
close(fid);
}
# endif /* TIOCNOTTY */
ntp_setpgrp(0, getpid());
# endif /* !HAVE_SETSID && !HAVE_SETPGID */
# ifdef _AIX
/* Don't get killed by low-on-memory signal. */
sa.sa_handler = catch_danger;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(SIGDANGER, &sa, NULL);
# endif /* _AIX */
# endif /* HAVE_WORKING_FORK */
}
# ifdef SCO5_CLOCK
/*
* SCO OpenServer's system clock offers much more precise timekeeping
* on the base CPU than the other CPUs (for multiprocessor systems),
* so we must lock to the base CPU.
*/
fd = open("/dev/at1", O_RDONLY);
if (fd >= 0) {
zero = 0;
if (ioctl(fd, ACPU_LOCK, &zero) < 0)
msyslog(LOG_ERR, "cannot lock to base CPU: %m");
close(fd);
}
# endif
/* Setup stack size in preparation for locking pages in memory. */
# if defined(HAVE_MLOCKALL)
# ifdef HAVE_SETRLIMIT
ntp_rlimit(RLIMIT_STACK, DFLT_RLIMIT_STACK * 4096, 4096, "4k");
# ifdef RLIMIT_MEMLOCK
/*
* The default RLIMIT_MEMLOCK is very low on Linux systems.
* Unless we increase this limit malloc calls are likely to
* fail if we drop root privilege. To be useful the value
* has to be larger than the largest ntpd resident set size.
*/
ntp_rlimit(RLIMIT_MEMLOCK, DFLT_RLIMIT_MEMLOCK * 1024 * 1024, 1024 * 1024, "MB");
# endif /* RLIMIT_MEMLOCK */
# endif /* HAVE_SETRLIMIT */
# else /* !HAVE_MLOCKALL follows */
# ifdef HAVE_PLOCK
# ifdef PROCLOCK
# ifdef _AIX
/*
* set the stack limit for AIX for plock().
* see get_aix_stack() for more info.
*/
if (ulimit(SET_STACKLIM, (get_aix_stack() - 8 * 4096)) < 0)
msyslog(LOG_ERR,
"Cannot adjust stack limit for plock: %m");
# endif /* _AIX */
# endif /* PROCLOCK */
# endif /* HAVE_PLOCK */
# endif /* !HAVE_MLOCKALL */
/*
* Set up signals we pay attention to locally.
*/
# ifdef SIGDIE1
signal_no_reset(SIGDIE1, finish);
signal_no_reset(SIGDIE2, finish);
signal_no_reset(SIGDIE3, finish);
signal_no_reset(SIGDIE4, finish);
# endif
# ifdef SIGBUS
signal_no_reset(SIGBUS, finish);
# endif
# if !defined(SYS_WINNT) && !defined(VMS)
# ifdef DEBUG
(void) signal_no_reset(MOREDEBUGSIG, moredebug);
(void) signal_no_reset(LESSDEBUGSIG, lessdebug);
# else
(void) signal_no_reset(MOREDEBUGSIG, no_debug);
(void) signal_no_reset(LESSDEBUGSIG, no_debug);
# endif /* DEBUG */
# endif /* !SYS_WINNT && !VMS */
/*
* Set up signals we should never pay attention to.
*/
# ifdef SIGPIPE
signal_no_reset(SIGPIPE, SIG_IGN);
# endif
/*
* Call the init_ routines to initialize the data structures.
*
* Exactly what command-line options are we expecting here?
*/
INIT_SSL();
init_auth();
init_util();
init_restrict();
init_mon();
init_timer();
init_request();
init_control();
init_peer();
# ifdef REFCLOCK
init_refclock();
# endif
set_process_priority();
init_proto(); /* Call at high priority */
init_io();
init_loopfilter();
mon_start(MON_ON); /* monitor on by default now */
/* turn off in config if unwanted */
/*
* Get the configuration. This is done in a separate module
* since this will definitely be different for the gizmo board.
*/
getconfig(argc, argv);
if (-1 == cur_memlock) {
# if defined(HAVE_MLOCKALL)
/*
* lock the process into memory
*/
if ( !HAVE_OPT(SAVECONFIGQUIT)
# ifdef RLIMIT_MEMLOCK
&& -1 != DFLT_RLIMIT_MEMLOCK
# endif
&& 0 != mlockall(MCL_CURRENT|MCL_FUTURE))
msyslog(LOG_ERR, "mlockall(): %m");
# else /* !HAVE_MLOCKALL follows */
# ifdef HAVE_PLOCK
# ifdef PROCLOCK
/*
* lock the process into memory
*/
if (!HAVE_OPT(SAVECONFIGQUIT) && 0 != plock(PROCLOCK))
msyslog(LOG_ERR, "plock(PROCLOCK): %m");
# else /* !PROCLOCK follows */
# ifdef TXTLOCK
/*
* Lock text into ram
*/
if (!HAVE_OPT(SAVECONFIGQUIT) && 0 != plock(TXTLOCK))
msyslog(LOG_ERR, "plock(TXTLOCK) error: %m");
# else /* !TXTLOCK follows */
msyslog(LOG_ERR, "plock() - don't know what to lock!");
# endif /* !TXTLOCK */
# endif /* !PROCLOCK */
# endif /* HAVE_PLOCK */
# endif /* !HAVE_MLOCKALL */
}
loop_config(LOOP_DRIFTINIT, 0);
report_event(EVNT_SYSRESTART, NULL, NULL);
initializing = FALSE;
# ifdef HAVE_DROPROOT
if (droproot) {
/* Drop super-user privileges and chroot now if the OS supports this */
# ifdef HAVE_LINUX_CAPABILITIES
/* set flag: keep privileges accross setuid() call (we only really need cap_sys_time): */
if (prctl( PR_SET_KEEPCAPS, 1L, 0L, 0L, 0L ) == -1) {
msyslog( LOG_ERR, "prctl( PR_SET_KEEPCAPS, 1L ) failed: %m" );
exit(-1);
}
# elif HAVE_SOLARIS_PRIVS
/* Nothing to do here */
# else
/* we need a user to switch to */
if (user == NULL) {
msyslog(LOG_ERR, "Need user name to drop root privileges (see -u flag!)" );
exit(-1);
}
# endif /* HAVE_LINUX_CAPABILITIES || HAVE_SOLARIS_PRIVS */
if (user != NULL) {
if (isdigit((unsigned char)*user)) {
sw_uid = (uid_t)strtoul(user, &endp, 0);
if (*endp != '\0')
goto getuser;
if ((pw = getpwuid(sw_uid)) != NULL) {
free(user);
user = estrdup(pw->pw_name);
sw_gid = pw->pw_gid;
} else {
errno = 0;
msyslog(LOG_ERR, "Cannot find user ID %s", user);
exit (-1);
}
} else {
getuser:
errno = 0;
if ((pw = getpwnam(user)) != NULL) {
sw_uid = pw->pw_uid;
sw_gid = pw->pw_gid;
} else {
if (errno)
msyslog(LOG_ERR, "getpwnam(%s) failed: %m", user);
else
msyslog(LOG_ERR, "Cannot find user `%s'", user);
exit (-1);
}
}
}
if (group != NULL) {
if (isdigit((unsigned char)*group)) {
sw_gid = (gid_t)strtoul(group, &endp, 0);
if (*endp != '\0')
goto getgroup;
} else {
getgroup:
if ((gr = getgrnam(group)) != NULL) {
sw_gid = gr->gr_gid;
} else {
errno = 0;
msyslog(LOG_ERR, "Cannot find group `%s'", group);
exit (-1);
}
}
}
if (chrootdir ) {
/* make sure cwd is inside the jail: */
if (chdir(chrootdir)) {
msyslog(LOG_ERR, "Cannot chdir() to `%s': %m", chrootdir);
exit (-1);
}
if (chroot(chrootdir)) {
msyslog(LOG_ERR, "Cannot chroot() to `%s': %m", chrootdir);
exit (-1);
}
if (chdir("/")) {
msyslog(LOG_ERR, "Cannot chdir() to`root after chroot(): %m");
exit (-1);
}
}
# ifdef HAVE_SOLARIS_PRIVS
if ((lowprivs = priv_str_to_set(LOWPRIVS, ",", NULL)) == NULL) {
msyslog(LOG_ERR, "priv_str_to_set() failed:%m");
exit(-1);
}
if ((highprivs = priv_allocset()) == NULL) {
msyslog(LOG_ERR, "priv_allocset() failed:%m");
exit(-1);
}
(void) getppriv(PRIV_PERMITTED, highprivs);
(void) priv_intersect(highprivs, lowprivs);
if (setppriv(PRIV_SET, PRIV_PERMITTED, lowprivs) == -1) {
msyslog(LOG_ERR, "setppriv() failed:%m");
exit(-1);
}
# endif /* HAVE_SOLARIS_PRIVS */
if (user && initgroups(user, sw_gid)) {
msyslog(LOG_ERR, "Cannot initgroups() to user `%s': %m", user);
exit (-1);
}
if (group && setgid(sw_gid)) {
msyslog(LOG_ERR, "Cannot setgid() to group `%s': %m", group);
exit (-1);
}
if (group && setegid(sw_gid)) {
msyslog(LOG_ERR, "Cannot setegid() to group `%s': %m", group);
exit (-1);
}
if (group) {
if (0 != setgroups(1, &sw_gid)) {
msyslog(LOG_ERR, "setgroups(1, %d) failed: %m", sw_gid);
exit (-1);
}
}
else if (pw)
if (0 != initgroups(pw->pw_name, pw->pw_gid)) {
msyslog(LOG_ERR, "initgroups(<%s>, %d) filed: %m", pw->pw_name, pw->pw_gid);
exit (-1);
}
if (user && setuid(sw_uid)) {
msyslog(LOG_ERR, "Cannot setuid() to user `%s': %m", user);
exit (-1);
}
if (user && seteuid(sw_uid)) {
msyslog(LOG_ERR, "Cannot seteuid() to user `%s': %m", user);
exit (-1);
}
# if !defined(HAVE_LINUX_CAPABILITIES) && !defined(HAVE_SOLARIS_PRIVS)
/*
* for now assume that the privilege to bind to privileged ports
* is associated with running with uid 0 - should be refined on
* ports that allow binding to NTP_PORT with uid != 0
*/
disable_dynamic_updates |= (sw_uid != 0); /* also notifies routing message listener */
# endif /* !HAVE_LINUX_CAPABILITIES && !HAVE_SOLARIS_PRIVS */
if (disable_dynamic_updates && interface_interval) {
interface_interval = 0;
msyslog(LOG_INFO, "running as non-root disables dynamic interface tracking");
}
# ifdef HAVE_LINUX_CAPABILITIES
{
/*
* We may be running under non-root uid now, but we still hold full root privileges!
* We drop all of them, except for the crucial one or two: cap_sys_time and
* cap_net_bind_service if doing dynamic interface tracking.
*/
cap_t caps;
char *captext;
captext = (0 != interface_interval)
? "cap_sys_time,cap_net_bind_service=pe"
: "cap_sys_time=pe";
caps = cap_from_text(captext);
if (!caps) {
msyslog(LOG_ERR,
"cap_from_text(%s) failed: %m",
captext);
exit(-1);
}
if (-1 == cap_set_proc(caps)) {
msyslog(LOG_ERR,
"cap_set_proc() failed to drop root privs: %m");
exit(-1);
}
cap_free(caps);
}
# endif /* HAVE_LINUX_CAPABILITIES */
# ifdef HAVE_SOLARIS_PRIVS
if (priv_delset(lowprivs, "proc_setid") == -1) {
msyslog(LOG_ERR, "priv_delset() failed:%m");
exit(-1);
}
if (setppriv(PRIV_SET, PRIV_PERMITTED, lowprivs) == -1) {
msyslog(LOG_ERR, "setppriv() failed:%m");
exit(-1);
}
priv_freeset(lowprivs);
priv_freeset(highprivs);
# endif /* HAVE_SOLARIS_PRIVS */
root_dropped = TRUE;
fork_deferred_worker();
} /* if (droproot) */
# endif /* HAVE_DROPROOT */
/* libssecomp sandboxing */
#if defined (LIBSECCOMP) && (KERN_SECCOMP)
scmp_filter_ctx ctx;
if ((ctx = seccomp_init(SCMP_ACT_KILL)) < 0)
msyslog(LOG_ERR, "%s: seccomp_init(SCMP_ACT_KILL) failed: %m", __func__);
else {
msyslog(LOG_DEBUG, "%s: seccomp_init(SCMP_ACT_KILL) succeeded", __func__);
}
#ifdef __x86_64__
int scmp_sc[] = {
SCMP_SYS(adjtimex),
SCMP_SYS(bind),
SCMP_SYS(brk),
SCMP_SYS(chdir),
SCMP_SYS(clock_gettime),
SCMP_SYS(clock_settime),
SCMP_SYS(close),
SCMP_SYS(connect),
SCMP_SYS(exit_group),
SCMP_SYS(fstat),
SCMP_SYS(fsync),
SCMP_SYS(futex),
SCMP_SYS(getitimer),
SCMP_SYS(getsockname),
SCMP_SYS(ioctl),
SCMP_SYS(lseek),
SCMP_SYS(madvise),
SCMP_SYS(mmap),
SCMP_SYS(munmap),
SCMP_SYS(open),
SCMP_SYS(poll),
SCMP_SYS(read),
SCMP_SYS(recvmsg),
SCMP_SYS(rename),
SCMP_SYS(rt_sigaction),
SCMP_SYS(rt_sigprocmask),
SCMP_SYS(rt_sigreturn),
SCMP_SYS(select),
SCMP_SYS(sendto),
SCMP_SYS(setitimer),
SCMP_SYS(setsid),
SCMP_SYS(socket),
SCMP_SYS(stat),
SCMP_SYS(time),
SCMP_SYS(write),
};
#endif
#ifdef __i386__
int scmp_sc[] = {
SCMP_SYS(_newselect),
SCMP_SYS(adjtimex),
SCMP_SYS(brk),
SCMP_SYS(chdir),
SCMP_SYS(clock_gettime),
SCMP_SYS(clock_settime),
SCMP_SYS(close),
SCMP_SYS(exit_group),
SCMP_SYS(fsync),
SCMP_SYS(futex),
SCMP_SYS(getitimer),
SCMP_SYS(madvise),
SCMP_SYS(mmap),
SCMP_SYS(mmap2),
SCMP_SYS(munmap),
SCMP_SYS(open),
SCMP_SYS(poll),
SCMP_SYS(read),
SCMP_SYS(rename),
SCMP_SYS(rt_sigaction),
SCMP_SYS(rt_sigprocmask),
SCMP_SYS(select),
SCMP_SYS(setitimer),
SCMP_SYS(setsid),
SCMP_SYS(sigprocmask),
SCMP_SYS(sigreturn),
SCMP_SYS(socketcall),
SCMP_SYS(stat64),
SCMP_SYS(time),
SCMP_SYS(write),
};
#endif
{
int i;
for (i = 0; i < COUNTOF(scmp_sc); i++) {
if (seccomp_rule_add(ctx,
SCMP_ACT_ALLOW, scmp_sc[i], 0) < 0) {
msyslog(LOG_ERR,
"%s: seccomp_rule_add() failed: %m",
__func__);
}
}
}
if (seccomp_load(ctx) < 0)
msyslog(LOG_ERR, "%s: seccomp_load() failed: %m",
__func__);
else {
msyslog(LOG_DEBUG, "%s: seccomp_load() succeeded", __func__);
}
#endif /* LIBSECCOMP and KERN_SECCOMP */
# ifdef HAVE_IO_COMPLETION_PORT
for (;;) {
GetReceivedBuffers();
# else /* normal I/O */
BLOCK_IO_AND_ALARM();
was_alarmed = FALSE;
for (;;) {
if (alarm_flag) { /* alarmed? */
was_alarmed = TRUE;
alarm_flag = FALSE;
}
if (!was_alarmed && !has_full_recv_buffer()) {
/*
* Nothing to do. Wait for something.
*/
io_handler();
}
if (alarm_flag) { /* alarmed? */
was_alarmed = TRUE;
alarm_flag = FALSE;
}
if (was_alarmed) {
UNBLOCK_IO_AND_ALARM();
/*
* Out here, signals are unblocked. Call timer routine
* to process expiry.
*/
timer();
was_alarmed = FALSE;
BLOCK_IO_AND_ALARM();
}
# endif /* !HAVE_IO_COMPLETION_PORT */
# ifdef DEBUG_TIMING
{
l_fp pts;
l_fp tsa, tsb;
int bufcount = 0;
get_systime(&pts);
tsa = pts;
# endif
rbuf = get_full_recv_buffer();
while (rbuf != NULL) {
if (alarm_flag) {
was_alarmed = TRUE;
alarm_flag = FALSE;
}
UNBLOCK_IO_AND_ALARM();
if (was_alarmed) {
/* avoid timer starvation during lengthy I/O handling */
timer();
was_alarmed = FALSE;
}
/*
* Call the data procedure to handle each received
* packet.
*/
if (rbuf->receiver != NULL) {
# ifdef DEBUG_TIMING
l_fp dts = pts;
L_SUB(&dts, &rbuf->recv_time);
DPRINTF(2, ("processing timestamp delta %s (with prec. fuzz)\n", lfptoa(&dts, 9)));
collect_timing(rbuf, "buffer processing delay", 1, &dts);
bufcount++;
# endif
(*rbuf->receiver)(rbuf);
} else {
msyslog(LOG_ERR, "fatal: receive buffer callback NULL");
abort();
}
BLOCK_IO_AND_ALARM();
freerecvbuf(rbuf);
rbuf = get_full_recv_buffer();
}
# ifdef DEBUG_TIMING
get_systime(&tsb);
L_SUB(&tsb, &tsa);
if (bufcount) {
collect_timing(NULL, "processing", bufcount, &tsb);
DPRINTF(2, ("processing time for %d buffers %s\n", bufcount, lfptoa(&tsb, 9)));
}
}
# endif
/*
* Go around again
*/
# ifdef HAVE_DNSREGISTRATION
if (mdnsreg && (current_time - mdnsreg ) > 60 && mdnstries && sys_leap != LEAP_NOTINSYNC) {
mdnsreg = current_time;
msyslog(LOG_INFO, "Attempting to register mDNS");
if ( DNSServiceRegister (&mdns, 0, 0, NULL, "_ntp._udp", NULL, NULL,
htons(NTP_PORT), 0, NULL, NULL, NULL) != kDNSServiceErr_NoError ) {
if (!--mdnstries) {
msyslog(LOG_ERR, "Unable to register mDNS, giving up.");
} else {
msyslog(LOG_INFO, "Unable to register mDNS, will try later.");
}
} else {
msyslog(LOG_INFO, "mDNS service registered.");
mdnsreg = FALSE;
}
}
# endif /* HAVE_DNSREGISTRATION */
}
UNBLOCK_IO_AND_ALARM();
return 1;
}
#endif /* !SIM */
#if !defined(SIM) && defined(SIGDIE1)
/*
* finish - exit gracefully
*/
static RETSIGTYPE
finish(
int sig
)
{
const char *sig_desc;
sig_desc = NULL;
#ifdef HAVE_STRSIGNAL
sig_desc = strsignal(sig);
#endif
if (sig_desc == NULL)
sig_desc = "";
msyslog(LOG_NOTICE, "%s exiting on signal %d (%s)", progname,
sig, sig_desc);
/* See Bug 2513 and Bug 2522 re the unlink of PIDFILE */
# ifdef HAVE_DNSREGISTRATION
if (mdns != NULL)
DNSServiceRefDeallocate(mdns);
# endif
peer_cleanup();
exit(0);
}
#endif /* !SIM && SIGDIE1 */
#ifndef SIM
/*
* wait_child_sync_if - implements parent side of -w/--wait-sync
*/
# ifdef HAVE_WORKING_FORK
static int
wait_child_sync_if(
int pipe_read_fd,
long wait_sync
)
{
int rc;
int exit_code;
time_t wait_end_time;
time_t cur_time;
time_t wait_rem;
fd_set readset;
struct timeval wtimeout;
if (0 == wait_sync)
return 0;
/* waitsync_fd_to_close used solely by child */
close(waitsync_fd_to_close);
wait_end_time = time(NULL) + wait_sync;
do {
cur_time = time(NULL);
wait_rem = (wait_end_time > cur_time)
? (wait_end_time - cur_time)
: 0;
wtimeout.tv_sec = wait_rem;
wtimeout.tv_usec = 0;
FD_ZERO(&readset);
FD_SET(pipe_read_fd, &readset);
rc = select(pipe_read_fd + 1, &readset, NULL, NULL,
&wtimeout);
if (-1 == rc) {
if (EINTR == errno)
continue;
exit_code = (errno) ? errno : -1;
msyslog(LOG_ERR,
"--wait-sync select failed: %m");
return exit_code;
}
if (0 == rc) {
/*
* select() indicated a timeout, but in case
* its timeouts are affected by a step of the
* system clock, select() again with a zero
* timeout to confirm.
*/
FD_ZERO(&readset);
FD_SET(pipe_read_fd, &readset);
wtimeout.tv_sec = 0;
wtimeout.tv_usec = 0;
rc = select(pipe_read_fd + 1, &readset, NULL,
NULL, &wtimeout);
if (0 == rc) /* select() timeout */
break;
else /* readable */
return 0;
} else /* readable */
return 0;
} while (wait_rem > 0);
fprintf(stderr, "%s: -w/--wait-sync %ld timed out.\n",
progname, wait_sync);
return ETIMEDOUT;
}
priv_set_t *priv_str_to_set (const char *buf, const char *sep,
const char **endptr)
{
/* Take a copy of the string since strtok_r will modify it. */
char *str = strdup (buf);
if (!str)
return NULL;
priv_set_t *set = priv_allocset ();
if (!set)
{
free (str);
return NULL;
}
priv_emptyset (set);
const priv_data_t *data = __priv_parse_data_cached ();
if (!data)
return NULL;
priv_set_t *basic = data->pd_basicprivs;
char *saveptr;
char *priv = strtok_r (str, sep, &saveptr);
if (!priv)
return set;
do
{
if (strcmp (priv, "basic") == 0 && basic)
priv_union (basic, set);
else if (strcmp (priv, "all") == 0)
priv_fillset (set);
else if (strcmp (priv, "none") == 0)
priv_emptyset (set);
else if (strcmp (priv, "zone") == 0)
{
priv_set_t *zone = priv_allocset ();
if (!zone)
goto inval;
if (zone_getattr (getzoneid (), ZONE_ATTR_PRIVSET,
zone, __PRIVSETSIZE) == 0)
priv_union (zone, set);
priv_freeset (zone);
}
else
{
int negate = *str == '-' || *str == '!';
if (negate)
str++;
int res;
if (negate)
res = priv_delset (set, str);
else
res = priv_addset (set, str);
if (res == -1)
goto inval;
}
}
while ((priv = strtok_r (NULL, sep, &saveptr))) ;
free (str);
return set;
inval:
priv_freeset (set);
free (str);
__set_errno (EINVAL);
return NULL;
}
void
cred_init(void)
{
priv_init();
crsize = sizeof (cred_t);
if (get_c2audit_load() > 0) {
#ifdef _LP64
/* assure audit context is 64-bit aligned */
audoff = (crsize +
sizeof (int64_t) - 1) & ~(sizeof (int64_t) - 1);
#else /* _LP64 */
audoff = crsize;
#endif /* _LP64 */
crsize = audoff + sizeof (auditinfo_addr_t);
crsize = (crsize + sizeof (int) - 1) & ~(sizeof (int) - 1);
}
cred_cache = kmem_cache_create("cred_cache", crsize, 0,
NULL, NULL, NULL, NULL, NULL, 0);
/*
* dummycr is used to copy initial state for creds.
*/
dummycr = cralloc();
bzero(dummycr, crsize);
dummycr->cr_ref = 1;
dummycr->cr_uid = (uid_t)-1;
dummycr->cr_gid = (gid_t)-1;
dummycr->cr_ruid = (uid_t)-1;
dummycr->cr_rgid = (gid_t)-1;
dummycr->cr_suid = (uid_t)-1;
dummycr->cr_sgid = (gid_t)-1;
/*
* kcred is used by anything that needs all privileges; it's
* also the template used for crget as it has all the compatible
* sets filled in.
*/
kcred = cralloc();
bzero(kcred, crsize);
kcred->cr_ref = 1;
/* kcred is never freed, so we don't need zone_cred_hold here */
kcred->cr_zone = &zone0;
priv_fillset(&CR_LPRIV(kcred));
CR_IPRIV(kcred) = *priv_basic;
/* Not a basic privilege, if chown is not restricted add it to I0 */
if (!rstchown)
priv_addset(&CR_IPRIV(kcred), PRIV_FILE_CHOWN_SELF);
/* Basic privilege, if link is restricted remove it from I0 */
if (rstlink)
priv_delset(&CR_IPRIV(kcred), PRIV_FILE_LINK_ANY);
CR_EPRIV(kcred) = CR_PPRIV(kcred) = CR_IPRIV(kcred);
CR_FLAGS(kcred) = NET_MAC_AWARE;
/*
* Set up credentials of p0.
*/
ttoproc(curthread)->p_cred = kcred;
curthread->t_cred = kcred;
ucredsize = UCRED_SIZE;
mutex_init(&ephemeral_zone_mutex, NULL, MUTEX_DEFAULT, NULL);
zone_key_create(&ephemeral_zone_key, NULL, NULL, destroy_ephemeral_zsd);
}
