[secnet] / secnet.c

#include "secnet.h"
#include <stdio.h>
#include <assert.h>
#include <limits.h>
#include <string.h>
#include <getopt.h>
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <pwd.h>

#include "util.h"
#include "conffile.h"
#include "process.h"

/* XXX should be from autoconf */
static const char *configfile="/etc/secnet/secnet.conf";
static const char *sites_key="sites";
bool_t just_check_config=False;
static char *userid=NULL;
static uid_t uid=0;
bool_t background=True;
static char *pidfile=NULL;
bool_t require_root_privileges=False;
cstring_t require_root_privileges_explanation=NULL;

static pid_t secnet_pid;

/* Structures dealing with poll() call */
struct poll_interest {
    beforepoll_fn *before;
    afterpoll_fn *after;
    void *state;
    int32_t max_nfds;
    int32_t nfds;
    cstring_t desc;
    struct poll_interest *next;
};
static struct poll_interest *reg=NULL;
static int32_t total_nfds=10;

static bool_t finished=False;

/* Parse the command line options */
static void parse_options(int argc, char **argv)
{
    int c;

    while (True) {
	int option_index = 0;
	static struct option long_options[] = {
	    {"verbose", 0, 0, 'v'},
	    {"nowarnings", 0, 0, 'w'},
	    {"help", 0, 0, 2},
	    {"version", 0, 0, 1},
	    {"nodetach", 0, 0, 'n'},
	    {"silent", 0, 0, 'f'},
	    {"quiet", 0, 0, 'f'},
	    {"debug", 1, 0, 'd'},
	    {"config", 1, 0, 'c'},
	    {"just-check-config", 0, 0, 'j'},
	    {"sites-key", 1, 0, 's'},
	    {0,0,0,0}
	};

	c=getopt_long(argc, argv, "vwdnjc:ft:s:",
		      long_options, &option_index);
	if (c==-1)
	    break;

	switch(c) {
	case 2:
	    /* Help */
	    printf("Usage: secnet [OPTION]...\n\n"
		   "  -f, --silent, --quiet   suppress error messages\n"
		   "  -w, --nowarnings        suppress warnings\n"
		   "  -v, --verbose           output extra diagnostics\n"
		   "  -c, --config=filename   specify a configuration file\n"
		   "  -j, --just-check-config stop after reading "
		   "configuration file\n"
		   "  -s, --sites-key=name    configuration key that "
		   "specifies active sites\n"
		   "  -n, --nodetach          do not run in background\n"
		   "  -d, --debug=item,...    set debug options\n"
		   "      --help              display this help and exit\n"
		   "      --version           output version information "
		   "and exit\n"
		);
	    exit(0);
	    break;
      
	case 1:
	    /* Version */
	    printf("%s\n",version);
	    exit(0);
	    break;

	case 'v':
	    message_level|=M_INFO|M_NOTICE|M_WARNING|M_ERR|M_SECURITY|
		M_FATAL;
	    break;

	case 'w':
	    message_level&=(~M_WARNING);
	    break;

	case 'd':
	    message_level|=M_DEBUG_CONFIG|M_DEBUG_PHASE|M_DEBUG;
	    break;

	case 'f':
	    message_level=M_FATAL;
	    break;

	case 'n':
	    background=False;
	    break;

	case 'c':
	    if (optarg)
		configfile=safe_strdup(optarg,"config_filename");
	    else
		fatal("secnet: no config filename specified");
	    break;

	case 'j':
	    just_check_config=True;
	    break;

	case 's':
	    if (optarg)
		sites_key=safe_strdup(optarg,"sites-key");
	    else
		fatal("secnet: no sites key specified");
	    break;

	case '?':
	    break;

	default:
	    Message(M_ERR,"secnet: Unknown getopt code %c\n",c);
	}
    }

    if (argc-optind != 0) {
	Message(M_ERR,"secnet: You gave extra command line parameters, "
		"which were ignored.\n");
    }
}

static void setup(dict_t *config)
{
    list_t *l;
    item_t *site;
    dict_t *system;
    struct passwd *pw;
    struct cloc loc;
    int i;

    l=dict_lookup(config,"system");

    if (!l || list_elem(l,0)->type!=t_dict) {
	fatal("configuration does not include a \"system\" dictionary");
    }
    system=list_elem(l,0)->data.dict;
    loc=list_elem(l,0)->loc;

    /* Arrange systemwide log facility */
    l=dict_lookup(system,"log");
    if (!l) {
	fatal("configuration does not include a system/log facility");
    }
    system_log=init_log(l);

    /* Who are we supposed to run as? */
    userid=dict_read_string(system,"userid",False,"system",loc);
    if (userid) {
	do {
	    pw=getpwent();
	    if (pw && strcmp(pw->pw_name,userid)==0) {
		uid=pw->pw_uid;
		break;
	    }
	} while(pw);
	endpwent();
	if (uid==0) {
	    fatal("userid \"%s\" not found",userid);
	}
    }

    /* Pidfile name */
    pidfile=dict_read_string(system,"pidfile",False,"system",loc);

    /* Check whether we need root privileges */
    if (require_root_privileges && uid!=0) {
	fatal("the configured feature \"%s\" requires "
	      "that secnet retain root privileges while running.",
	      require_root_privileges_explanation);
    }

    /* Go along site list, starting sites */
    l=dict_lookup(config,sites_key);
    if (!l) {
	Message(M_WARNING,"secnet: configuration key \"%s\" is missing; no "
		"remote sites are defined\n",sites_key);
    } else {
	i=0;
	while ((site=list_elem(l, i++))) {
	    struct site_if *s;
	    if (site->type!=t_closure) {
		cfgfatal(site->loc,"system","non-closure in site list");
	    }
	    if (site->data.closure->type!=CL_SITE) {
		cfgfatal(site->loc,"system","non-site closure in site list");
	    }
	    s=site->data.closure->interface;
	    s->control(s->st,True);
	}
    }
}

void register_for_poll(void *st, beforepoll_fn *before,
		       afterpoll_fn *after, int32_t max_nfds, cstring_t desc)
{
    struct poll_interest *i;

    i=safe_malloc(sizeof(*i),"register_for_poll");
    i->before=before;
    i->after=after;
    i->state=st;
    i->max_nfds=max_nfds;
    i->nfds=0;
    i->desc=desc;
    assert(total_nfds < INT_MAX - max_nfds);
    total_nfds+=max_nfds;
    i->next=reg;
    reg=i;
    return;
}

static void system_phase_hook(void *sst, uint32_t newphase)
{
    if (newphase==PHASE_SHUTDOWN && pidfile) {
	/* Try to unlink the pidfile; don't care if it fails */
	unlink(pidfile);
    }
}

static void run(void)
{
    struct timeval tv_now;
    uint64_t now;
    struct poll_interest *i;
    int rv, nfds, remain, idx;
    int timeout;
    struct pollfd *fds;

    fds=safe_malloc(sizeof(*fds)*total_nfds, "run");

    Message(M_NOTICE,"%s [%d]: starting\n",version,secnet_pid);

    do {
	if (gettimeofday(&tv_now, NULL)!=0) {
	    fatal_perror("main loop: gettimeofday");
	}
	now=((uint64_t)tv_now.tv_sec*(uint64_t)1000)+
	    ((uint64_t)tv_now.tv_usec/(uint64_t)1000);
	idx=0;
	for (i=reg; i; i=i->next) {
	    i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
	    idx+=i->nfds;
	}
	remain=total_nfds;
	idx=0;
	timeout=-1;
	for (i=reg; i; i=i->next) {
	    nfds=remain;
	    rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
	    if (rv!=0) {
		/* XXX we need to handle this properly: increase the
		   nfds available */
		fatal("run: beforepoll_fn (%s) returns %d",i->desc,rv);
	    }
	    if (timeout<-1) {
		fatal("run: beforepoll_fn (%s) set timeout to %d",timeout);
	    }
	    idx+=nfds;
	    remain-=nfds;
	    i->nfds=nfds;
	}
	do {
	    if (finished) break;
	    rv=poll(fds, idx, timeout);
	    if (rv<0) {
		if (errno!=EINTR) {
		    fatal_perror("run: poll");
		}
	    }
	} while (rv<0);
    } while (!finished);
    free(fds);
}

static void droppriv(void)
{
    FILE *pf=NULL;
    pid_t p;
    int errfds[2];

    add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);

    /* Open the pidfile for writing now: we may be unable to do so
       once we drop privileges. */
    if (pidfile) {
	pf=fopen(pidfile,"w");
	if (!pf) {
	    fatal_perror("cannot open pidfile \"%s\"",pidfile);
	}
    }
    if (!background && pf) {
	fprintf(pf,"%d\n",getpid());
	fclose(pf);
    }

    /* Now drop privileges */
    if (uid!=0) {
	if (setuid(uid)!=0) {
	    fatal_perror("can't set uid to \"%s\"",userid);
	}
    }
    if (background) {
	p=fork();
	if (p>0) {
	    if (pf) {
		/* Parent process - write pidfile, exit */
		fprintf(pf,"%d\n",p);
		fclose(pf);
	    }
	    exit(0);
	} else if (p==0) {
	    /* Child process - all done, just carry on */
	    if (pf) fclose(pf);
	    /* Close stdin and stdout; we don't need them any more.
               stderr is redirected to the system/log facility */
	    if (pipe(errfds)!=0) {
		fatal_perror("can't create pipe for stderr");
	    }
	    close(0);
	    close(1);
	    close(2);
	    dup2(errfds[1],0);
	    dup2(errfds[1],1);
	    dup2(errfds[1],2);
	    secnet_is_daemon=True;
	    setsid();
	    log_from_fd(errfds[0],"stderr",system_log);
	} else {
	    /* Error */
	    fatal_perror("cannot fork");
	    exit(1);
	}
    }
    secnet_pid=getpid();
}

static signal_notify_fn finish,ignore_hup;
static void finish(void *st, int signum)
{
    finished=True;
    Message(M_NOTICE,"%s [%d]: received %s\n",version,secnet_pid,(string_t)st);
}
static void ignore_hup(void *st, int signum)
{
    Message(M_INFO,"%s [%d]: received SIGHUP\n",version,secnet_pid);
    return;
}

int main(int argc, char **argv)
{
    dict_t *config;

    enter_phase(PHASE_GETOPTS);
    parse_options(argc,argv);

    enter_phase(PHASE_READCONFIG);
    config=read_conffile(configfile);

    enter_phase(PHASE_SETUP);
    setup(config);

    if (just_check_config) {
	Message(M_INFO,"configuration file check complete\n");
	exit(0);
    }

    enter_phase(PHASE_GETRESOURCES);
    /* Appropriate phase hooks will have been run */
    
    enter_phase(PHASE_DROPPRIV);
    droppriv();

    start_signal_handling();
    request_signal_notification(SIGTERM,finish,safe_strdup("SIGTERM","run"));
    if (!background) request_signal_notification(SIGINT,finish,
						 safe_strdup("SIGINT","run"));
    request_signal_notification(SIGHUP,ignore_hup,NULL);
    enter_phase(PHASE_RUN);
    run();

    enter_phase(PHASE_SHUTDOWN);
    Message(M_NOTICE,"%s [%d]: finished\n",version,secnet_pid);

    return 0;
}
Commit	Line	Data
8689b3a9	1	#include "secnet.h"
2fe58dfd	2	#include <stdio.h>
59230b9b IJ	3	#include <assert.h>
59230b9b IJ	4	#include <limits.h>
2fe58dfd SE	5	#include <string.h>
2fe58dfd SE	6	#include <getopt.h>
2fe58dfd	7	#include <errno.h>
8689b3a9	8	#include <unistd.h>
2fe58dfd	9	#include <sys/socket.h>
2fe58dfd	10	#include <arpa/inet.h>
2fe58dfd	11	#include <pwd.h>
2fe58dfd	12
2fe58dfd SE	13	#include "util.h"
2fe58dfd SE	14	#include "conffile.h"
7138d0c5	15	#include "process.h"
2fe58dfd	16
b2a56f7c	17	/* XXX should be from autoconf */
fe5e9cc4 SE	18	static const char *configfile="/etc/secnet/secnet.conf";
fe5e9cc4 SE	19	static const char *sites_key="sites";
baa06aeb	20	bool_t just_check_config=False;
2fe58dfd SE	21	static char *userid=NULL;
2fe58dfd SE	22	static uid_t uid=0;
b2a56f7c	23	bool_t background=True;
2fe58dfd	24	static char *pidfile=NULL;
9d3a4132	25	bool_t require_root_privileges=False;
fe5e9cc4	26	cstring_t require_root_privileges_explanation=NULL;
2fe58dfd	27
7138d0c5 SE	28	static pid_t secnet_pid;
7138d0c5 SE	29
2fe58dfd SE	30	/* Structures dealing with poll() call */
	31	struct poll_interest {
	32	beforepoll_fn *before;
	33	afterpoll_fn *after;
	34	void *state;
1caa23ff IJ	35	int32_t max_nfds;
1caa23ff IJ	36	int32_t nfds;
fe5e9cc4	37	cstring_t desc;
2fe58dfd SE	38	struct poll_interest *next;
	39	};
	40	static struct poll_interest *reg=NULL;
1caa23ff	41	static int32_t total_nfds=10;
2fe58dfd SE	42
	43	static bool_t finished=False;
	44
	45	/* Parse the command line options */
	46	static void parse_options(int argc, char **argv)
	47	{
	48	int c;
	49
	50	while (True) {
	51	int option_index = 0;
	52	static struct option long_options[] = {
	53	{"verbose", 0, 0, 'v'},
	54	{"nowarnings", 0, 0, 'w'},
	55	{"help", 0, 0, 2},
	56	{"version", 0, 0, 1},
	57	{"nodetach", 0, 0, 'n'},
	58	{"silent", 0, 0, 'f'},
	59	{"quiet", 0, 0, 'f'},
	60	{"debug", 1, 0, 'd'},
	61	{"config", 1, 0, 'c'},
baa06aeb	62	{"just-check-config", 0, 0, 'j'},
794f2398	63	{"sites-key", 1, 0, 's'},
2fe58dfd SE	64	{0,0,0,0}
	65	};
	66
794f2398	67	c=getopt_long(argc, argv, "vwdnjc:ft:s:",
2fe58dfd SE	68	long_options, &option_index);
	69	if (c==-1)
	70	break;
	71
	72	switch(c) {
	73	case 2:
	74	/* Help */
4f5e39ec SE	75	printf("Usage: secnet [OPTION]...\n\n"
	76	" -f, --silent, --quiet suppress error messages\n"
	77	" -w, --nowarnings suppress warnings\n"
	78	" -v, --verbose output extra diagnostics\n"
	79	" -c, --config=filename specify a configuration file\n"
	80	" -j, --just-check-config stop after reading "
	81	"configuration file\n"
	82	" -s, --sites-key=name configuration key that "
	83	"specifies active sites\n"
	84	" -n, --nodetach do not run in background\n"
	85	" -d, --debug=item,... set debug options\n"
	86	" --help display this help and exit\n"
	87	" --version output version information "
	88	"and exit\n"
2fe58dfd SE	89	);
	90	exit(0);
	91	break;
	92
	93	case 1:
	94	/* Version */
4f5e39ec	95	printf("%s\n",version);
2fe58dfd SE	96	exit(0);
	97	break;
	98
	99	case 'v':
469fd1d9	100	message_level\|=M_INFO\|M_NOTICE\|M_WARNING\|M_ERR\|M_SECURITY\|
b2a56f7c	101	M_FATAL;
2fe58dfd SE	102	break;
2fe58dfd SE	103
b2a56f7c SE	104	case 'w':
b2a56f7c SE	105	message_level&=(~M_WARNING);
2fe58dfd SE	106	break;
	107
	108	case 'd':
b2a56f7c	109	message_level\|=M_DEBUG_CONFIG\|M_DEBUG_PHASE\|M_DEBUG;
2fe58dfd SE	110	break;
	111
	112	case 'f':
	113	message_level=M_FATAL;
	114	break;
	115
b2a56f7c SE	116	case 'n':
	117	background=False;
	118	break;
	119
2fe58dfd SE	120	case 'c':
	121	if (optarg)
	122	configfile=safe_strdup(optarg,"config_filename");
	123	else
	124	fatal("secnet: no config filename specified");
	125	break;
	126
baa06aeb SE	127	case 'j':
	128	just_check_config=True;
	129	break;
	130
794f2398 SE	131	case 's':
	132	if (optarg)
	133	sites_key=safe_strdup(optarg,"sites-key");
	134	else
	135	fatal("secnet: no sites key specified");
	136	break;
	137
2fe58dfd SE	138	case '?':
	139	break;
	140
	141	default:
469fd1d9	142	Message(M_ERR,"secnet: Unknown getopt code %c\n",c);
2fe58dfd SE	143	}
	144	}
	145
	146	if (argc-optind != 0) {
469fd1d9	147	Message(M_ERR,"secnet: You gave extra command line parameters, "
2fe58dfd SE	148	"which were ignored.\n");
	149	}
	150	}
	151
	152	static void setup(dict_t *config)
	153	{
	154	list_t *l;
	155	item_t *site;
	156	dict_t *system;
2fe58dfd SE	157	struct passwd *pw;
	158	struct cloc loc;
	159	int i;
	160
	161	l=dict_lookup(config,"system");
	162
	163	if (!l \|\| list_elem(l,0)->type!=t_dict) {
4f5e39ec	164	fatal("configuration does not include a \"system\" dictionary");
2fe58dfd SE	165	}
	166	system=list_elem(l,0)->data.dict;
	167	loc=list_elem(l,0)->loc;
	168
	169	/* Arrange systemwide log facility */
	170	l=dict_lookup(system,"log");
	171	if (!l) {
4f5e39ec	172	fatal("configuration does not include a system/log facility");
2fe58dfd	173	}
b2a56f7c	174	system_log=init_log(l);
2fe58dfd SE	175
	176	/* Who are we supposed to run as? */
	177	userid=dict_read_string(system,"userid",False,"system",loc);
	178	if (userid) {
	179	do {
	180	pw=getpwent();
	181	if (pw && strcmp(pw->pw_name,userid)==0) {
	182	uid=pw->pw_uid;
	183	break;
	184	}
	185	} while(pw);
	186	endpwent();
	187	if (uid==0) {
4f5e39ec	188	fatal("userid \"%s\" not found",userid);
2fe58dfd SE	189	}
	190	}
	191
	192	/* Pidfile name */
	193	pidfile=dict_read_string(system,"pidfile",False,"system",loc);
	194
9d3a4132 SE	195	/* Check whether we need root privileges */
9d3a4132 SE	196	if (require_root_privileges && uid!=0) {
4f5e39ec SE	197	fatal("the configured feature \"%s\" requires "
4f5e39ec SE	198	"that secnet retain root privileges while running.",
9d3a4132 SE	199	require_root_privileges_explanation);
	200	}
	201
2fe58dfd	202	/* Go along site list, starting sites */
794f2398	203	l=dict_lookup(config,sites_key);
2fe58dfd	204	if (!l) {
794f2398 SE	205	Message(M_WARNING,"secnet: configuration key \"%s\" is missing; no "
794f2398 SE	206	"remote sites are defined\n",sites_key);
9d3a4132 SE	207	} else {
	208	i=0;
	209	while ((site=list_elem(l, i++))) {
	210	struct site_if *s;
	211	if (site->type!=t_closure) {
	212	cfgfatal(site->loc,"system","non-closure in site list");
	213	}
	214	if (site->data.closure->type!=CL_SITE) {
	215	cfgfatal(site->loc,"system","non-site closure in site list");
	216	}
	217	s=site->data.closure->interface;
	218	s->control(s->st,True);
2fe58dfd	219	}
2fe58dfd SE	220	}
	221	}
	222
	223	void register_for_poll(void st, beforepoll_fn before,
1caa23ff	224	afterpoll_fn *after, int32_t max_nfds, cstring_t desc)
2fe58dfd SE	225	{
	226	struct poll_interest *i;
	227
	228	i=safe_malloc(sizeof(*i),"register_for_poll");
	229	i->before=before;
	230	i->after=after;
	231	i->state=st;
	232	i->max_nfds=max_nfds;
	233	i->nfds=0;
	234	i->desc=desc;
59230b9b	235	assert(total_nfds < INT_MAX - max_nfds);
2fe58dfd SE	236	total_nfds+=max_nfds;
	237	i->next=reg;
	238	reg=i;
	239	return;
	240	}
	241
	242	static void system_phase_hook(void *sst, uint32_t newphase)
	243	{
	244	if (newphase==PHASE_SHUTDOWN && pidfile) {
	245	/* Try to unlink the pidfile; don't care if it fails */
	246	unlink(pidfile);
	247	}
	248	}
	249
	250	static void run(void)
	251	{
	252	struct timeval tv_now;
	253	uint64_t now;
	254	struct poll_interest *i;
	255	int rv, nfds, remain, idx;
	256	int timeout;
	257	struct pollfd *fds;
	258
3b83c932	259	fds=safe_malloc(sizeof(fds)total_nfds, "run");
2fe58dfd	260
7138d0c5	261	Message(M_NOTICE,"%s [%d]: starting\n",version,secnet_pid);
b2a56f7c	262
7138d0c5	263	do {
2fe58dfd SE	264	if (gettimeofday(&tv_now, NULL)!=0) {
	265	fatal_perror("main loop: gettimeofday");
	266	}
d3fe100d SE	267	now=((uint64_t)tv_now.tv_sec*(uint64_t)1000)+
d3fe100d SE	268	((uint64_t)tv_now.tv_usec/(uint64_t)1000);
2fe58dfd SE	269	idx=0;
	270	for (i=reg; i; i=i->next) {
	271	i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
	272	idx+=i->nfds;
	273	}
	274	remain=total_nfds;
	275	idx=0;
	276	timeout=-1;
	277	for (i=reg; i; i=i->next) {
	278	nfds=remain;
	279	rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
	280	if (rv!=0) {
	281	/* XXX we need to handle this properly: increase the
	282	nfds available */
4f5e39ec	283	fatal("run: beforepoll_fn (%s) returns %d",i->desc,rv);
2fe58dfd SE	284	}
2fe58dfd SE	285	if (timeout<-1) {
4f5e39ec	286	fatal("run: beforepoll_fn (%s) set timeout to %d",timeout);
2fe58dfd SE	287	}
	288	idx+=nfds;
	289	remain-=nfds;
	290	i->nfds=nfds;
	291	}
	292	do {
7138d0c5	293	if (finished) break;
2fe58dfd SE	294	rv=poll(fds, idx, timeout);
	295	if (rv<0) {
	296	if (errno!=EINTR) {
	297	fatal_perror("run: poll");
	298	}
	299	}
	300	} while (rv<0);
7138d0c5	301	} while (!finished);
3b83c932	302	free(fds);
2fe58dfd SE	303	}
	304
	305	static void droppriv(void)
	306	{
	307	FILE *pf=NULL;
	308	pid_t p;
fe5e9cc4	309	int errfds[2];
2fe58dfd SE	310
	311	add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);
	312
b2a56f7c SE	313	/* Open the pidfile for writing now: we may be unable to do so
	314	once we drop privileges. */
	315	if (pidfile) {
	316	pf=fopen(pidfile,"w");
	317	if (!pf) {
	318	fatal_perror("cannot open pidfile \"%s\"",pidfile);
2fe58dfd	319	}
b2a56f7c SE	320	}
	321	if (!background && pf) {
	322	fprintf(pf,"%d\n",getpid());
	323	fclose(pf);
	324	}
	325
	326	/* Now drop privileges */
	327	if (uid!=0) {
	328	if (setuid(uid)!=0) {
	329	fatal_perror("can't set uid to \"%s\"",userid);
	330	}
	331	}
	332	if (background) {
2fe58dfd SE	333	p=fork();
	334	if (p>0) {
	335	if (pf) {
	336	/* Parent process - write pidfile, exit */
	337	fprintf(pf,"%d\n",p);
	338	fclose(pf);
	339	}
	340	exit(0);
	341	} else if (p==0) {
	342	/* Child process - all done, just carry on */
	343	if (pf) fclose(pf);
fe5e9cc4 SE	344	/* Close stdin and stdout; we don't need them any more.
	345	stderr is redirected to the system/log facility */
	346	if (pipe(errfds)!=0) {
	347	fatal_perror("can't create pipe for stderr");
	348	}
8dea8d37 SE	349	close(0);
8dea8d37 SE	350	close(1);
fe5e9cc4 SE	351	close(2);
	352	dup2(errfds[1],0);
	353	dup2(errfds[1],1);
	354	dup2(errfds[1],2);
b2a56f7c	355	secnet_is_daemon=True;
ff05a229	356	setsid();
fe5e9cc4	357	log_from_fd(errfds[0],"stderr",system_log);
2fe58dfd SE	358	} else {
	359	/* Error */
	360	fatal_perror("cannot fork");
	361	exit(1);
	362	}
2fe58dfd	363	}
7138d0c5 SE	364	secnet_pid=getpid();
7138d0c5 SE	365	}
2fe58dfd	366
7138d0c5 SE	367	static signal_notify_fn finish,ignore_hup;
	368	static void finish(void *st, int signum)
	369	{
	370	finished=True;
	371	Message(M_NOTICE,"%s [%d]: received %s\n",version,secnet_pid,(string_t)st);
	372	}
	373	static void ignore_hup(void *st, int signum)
	374	{
	375	Message(M_INFO,"%s [%d]: received SIGHUP\n",version,secnet_pid);
	376	return;
2fe58dfd SE	377	}
	378
	379	int main(int argc, char **argv)
	380	{
	381	dict_t *config;
	382
	383	enter_phase(PHASE_GETOPTS);
	384	parse_options(argc,argv);
	385
	386	enter_phase(PHASE_READCONFIG);
	387	config=read_conffile(configfile);
	388
	389	enter_phase(PHASE_SETUP);
	390	setup(config);
baa06aeb SE	391
	392	if (just_check_config) {
	393	Message(M_INFO,"configuration file check complete\n");
	394	exit(0);
	395	}
	396
	397	enter_phase(PHASE_GETRESOURCES);
	398	/* Appropriate phase hooks will have been run */
2fe58dfd SE	399
	400	enter_phase(PHASE_DROPPRIV);
	401	droppriv();
	402
7138d0c5	403	start_signal_handling();
fe5e9cc4 SE	404	request_signal_notification(SIGTERM,finish,safe_strdup("SIGTERM","run"));
	405	if (!background) request_signal_notification(SIGINT,finish,
	406	safe_strdup("SIGINT","run"));
7138d0c5	407	request_signal_notification(SIGHUP,ignore_hup,NULL);
042a8da9	408	enter_phase(PHASE_RUN);
2fe58dfd SE	409	run();
	410
	411	enter_phase(PHASE_SHUTDOWN);
7138d0c5	412	Message(M_NOTICE,"%s [%d]: finished\n",version,secnet_pid);
2fe58dfd SE	413
	414	return 0;
	415	}