[secnet] / secnet.c

extern char version[];

#include "secnet.h"
#include <stdio.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;

/* from log.c */
extern uint32_t message_level;
extern bool_t secnet_is_daemon;
extern struct log_if *system_log;

/* from process.c */
extern void start_signal_handling(void);

/* Structures dealing with poll() call */
struct poll_interest {
    beforepoll_fn *before;
    afterpoll_fn *after;
    void *state;
    uint32_t max_nfds;
    uint32_t nfds;
    cstring_t desc;
    struct poll_interest *next;
};
static struct poll_interest *reg=NULL;
static uint32_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, uint32_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;
    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=alloca(sizeof(*fds)*total_nfds);
    if (!fds) {
	fatal("run: couldn't alloca");
    }

    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);
}

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
974d0468	1	extern char version[];
2fe58dfd	2
8689b3a9	3	#include "secnet.h"
2fe58dfd SE	4	#include <stdio.h>
	5	#include <string.h>
	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;
	29
	30	/* from log.c */
	31	extern uint32_t message_level;
	32	extern bool_t secnet_is_daemon;
	33	extern struct log_if *system_log;
	34
	35	/* from process.c */
	36	extern void start_signal_handling(void);
	37
2fe58dfd SE	38	/* Structures dealing with poll() call */
	39	struct poll_interest {
	40	beforepoll_fn *before;
	41	afterpoll_fn *after;
	42	void *state;
	43	uint32_t max_nfds;
	44	uint32_t nfds;
fe5e9cc4	45	cstring_t desc;
2fe58dfd SE	46	struct poll_interest *next;
	47	};
	48	static struct poll_interest *reg=NULL;
	49	static uint32_t total_nfds=10;
	50
	51	static bool_t finished=False;
	52
	53	/* Parse the command line options */
	54	static void parse_options(int argc, char **argv)
	55	{
	56	int c;
	57
	58	while (True) {
	59	int option_index = 0;
	60	static struct option long_options[] = {
	61	{"verbose", 0, 0, 'v'},
	62	{"nowarnings", 0, 0, 'w'},
	63	{"help", 0, 0, 2},
	64	{"version", 0, 0, 1},
	65	{"nodetach", 0, 0, 'n'},
	66	{"silent", 0, 0, 'f'},
	67	{"quiet", 0, 0, 'f'},
	68	{"debug", 1, 0, 'd'},
	69	{"config", 1, 0, 'c'},
baa06aeb	70	{"just-check-config", 0, 0, 'j'},
794f2398	71	{"sites-key", 1, 0, 's'},
2fe58dfd SE	72	{0,0,0,0}
	73	};
	74
794f2398	75	c=getopt_long(argc, argv, "vwdnjc:ft:s:",
2fe58dfd SE	76	long_options, &option_index);
	77	if (c==-1)
	78	break;
	79
	80	switch(c) {
	81	case 2:
	82	/* Help */
4f5e39ec SE	83	printf("Usage: secnet [OPTION]...\n\n"
	84	" -f, --silent, --quiet suppress error messages\n"
	85	" -w, --nowarnings suppress warnings\n"
	86	" -v, --verbose output extra diagnostics\n"
	87	" -c, --config=filename specify a configuration file\n"
	88	" -j, --just-check-config stop after reading "
	89	"configuration file\n"
	90	" -s, --sites-key=name configuration key that "
	91	"specifies active sites\n"
	92	" -n, --nodetach do not run in background\n"
	93	" -d, --debug=item,... set debug options\n"
	94	" --help display this help and exit\n"
	95	" --version output version information "
	96	"and exit\n"
2fe58dfd SE	97	);
	98	exit(0);
	99	break;
	100
	101	case 1:
	102	/* Version */
4f5e39ec	103	printf("%s\n",version);
2fe58dfd SE	104	exit(0);
	105	break;
	106
	107	case 'v':
469fd1d9	108	message_level\|=M_INFO\|M_NOTICE\|M_WARNING\|M_ERR\|M_SECURITY\|
b2a56f7c	109	M_FATAL;
2fe58dfd SE	110	break;
2fe58dfd SE	111
b2a56f7c SE	112	case 'w':
b2a56f7c SE	113	message_level&=(~M_WARNING);
2fe58dfd SE	114	break;
	115
	116	case 'd':
b2a56f7c	117	message_level\|=M_DEBUG_CONFIG\|M_DEBUG_PHASE\|M_DEBUG;
2fe58dfd SE	118	break;
	119
	120	case 'f':
	121	message_level=M_FATAL;
	122	break;
	123
b2a56f7c SE	124	case 'n':
	125	background=False;
	126	break;
	127
2fe58dfd SE	128	case 'c':
	129	if (optarg)
	130	configfile=safe_strdup(optarg,"config_filename");
	131	else
	132	fatal("secnet: no config filename specified");
	133	break;
	134
baa06aeb SE	135	case 'j':
	136	just_check_config=True;
	137	break;
	138
794f2398 SE	139	case 's':
	140	if (optarg)
	141	sites_key=safe_strdup(optarg,"sites-key");
	142	else
	143	fatal("secnet: no sites key specified");
	144	break;
	145
2fe58dfd SE	146	case '?':
	147	break;
	148
	149	default:
469fd1d9	150	Message(M_ERR,"secnet: Unknown getopt code %c\n",c);
2fe58dfd SE	151	}
	152	}
	153
	154	if (argc-optind != 0) {
469fd1d9	155	Message(M_ERR,"secnet: You gave extra command line parameters, "
2fe58dfd SE	156	"which were ignored.\n");
	157	}
	158	}
	159
	160	static void setup(dict_t *config)
	161	{
	162	list_t *l;
	163	item_t *site;
	164	dict_t *system;
2fe58dfd SE	165	struct passwd *pw;
	166	struct cloc loc;
	167	int i;
	168
	169	l=dict_lookup(config,"system");
	170
	171	if (!l \|\| list_elem(l,0)->type!=t_dict) {
4f5e39ec	172	fatal("configuration does not include a \"system\" dictionary");
2fe58dfd SE	173	}
	174	system=list_elem(l,0)->data.dict;
	175	loc=list_elem(l,0)->loc;
	176
	177	/* Arrange systemwide log facility */
	178	l=dict_lookup(system,"log");
	179	if (!l) {
4f5e39ec	180	fatal("configuration does not include a system/log facility");
2fe58dfd	181	}
b2a56f7c	182	system_log=init_log(l);
2fe58dfd SE	183
	184	/* Who are we supposed to run as? */
	185	userid=dict_read_string(system,"userid",False,"system",loc);
	186	if (userid) {
	187	do {
	188	pw=getpwent();
	189	if (pw && strcmp(pw->pw_name,userid)==0) {
	190	uid=pw->pw_uid;
	191	break;
	192	}
	193	} while(pw);
	194	endpwent();
	195	if (uid==0) {
4f5e39ec	196	fatal("userid \"%s\" not found",userid);
2fe58dfd SE	197	}
	198	}
	199
	200	/* Pidfile name */
	201	pidfile=dict_read_string(system,"pidfile",False,"system",loc);
	202
9d3a4132 SE	203	/* Check whether we need root privileges */
9d3a4132 SE	204	if (require_root_privileges && uid!=0) {
4f5e39ec SE	205	fatal("the configured feature \"%s\" requires "
4f5e39ec SE	206	"that secnet retain root privileges while running.",
9d3a4132 SE	207	require_root_privileges_explanation);
	208	}
	209
2fe58dfd	210	/* Go along site list, starting sites */
794f2398	211	l=dict_lookup(config,sites_key);
2fe58dfd	212	if (!l) {
794f2398 SE	213	Message(M_WARNING,"secnet: configuration key \"%s\" is missing; no "
794f2398 SE	214	"remote sites are defined\n",sites_key);
9d3a4132 SE	215	} else {
	216	i=0;
	217	while ((site=list_elem(l, i++))) {
	218	struct site_if *s;
	219	if (site->type!=t_closure) {
	220	cfgfatal(site->loc,"system","non-closure in site list");
	221	}
	222	if (site->data.closure->type!=CL_SITE) {
	223	cfgfatal(site->loc,"system","non-site closure in site list");
	224	}
	225	s=site->data.closure->interface;
	226	s->control(s->st,True);
2fe58dfd	227	}
2fe58dfd SE	228	}
	229	}
	230
	231	void register_for_poll(void st, beforepoll_fn before,
fe5e9cc4	232	afterpoll_fn *after, uint32_t max_nfds, cstring_t desc)
2fe58dfd SE	233	{
	234	struct poll_interest *i;
	235
	236	i=safe_malloc(sizeof(*i),"register_for_poll");
	237	i->before=before;
	238	i->after=after;
	239	i->state=st;
	240	i->max_nfds=max_nfds;
	241	i->nfds=0;
	242	i->desc=desc;
	243	total_nfds+=max_nfds;
	244	i->next=reg;
	245	reg=i;
	246	return;
	247	}
	248
	249	static void system_phase_hook(void *sst, uint32_t newphase)
	250	{
	251	if (newphase==PHASE_SHUTDOWN && pidfile) {
	252	/* Try to unlink the pidfile; don't care if it fails */
	253	unlink(pidfile);
	254	}
	255	}
	256
	257	static void run(void)
	258	{
	259	struct timeval tv_now;
	260	uint64_t now;
	261	struct poll_interest *i;
	262	int rv, nfds, remain, idx;
	263	int timeout;
	264	struct pollfd *fds;
	265
	266	fds=alloca(sizeof(fds)total_nfds);
	267	if (!fds) {
4f5e39ec	268	fatal("run: couldn't alloca");
2fe58dfd SE	269	}
2fe58dfd SE	270
7138d0c5	271	Message(M_NOTICE,"%s [%d]: starting\n",version,secnet_pid);
b2a56f7c	272
7138d0c5	273	do {
2fe58dfd SE	274	if (gettimeofday(&tv_now, NULL)!=0) {
	275	fatal_perror("main loop: gettimeofday");
	276	}
d3fe100d SE	277	now=((uint64_t)tv_now.tv_sec*(uint64_t)1000)+
d3fe100d SE	278	((uint64_t)tv_now.tv_usec/(uint64_t)1000);
2fe58dfd SE	279	idx=0;
	280	for (i=reg; i; i=i->next) {
	281	i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
	282	idx+=i->nfds;
	283	}
	284	remain=total_nfds;
	285	idx=0;
	286	timeout=-1;
	287	for (i=reg; i; i=i->next) {
	288	nfds=remain;
	289	rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
	290	if (rv!=0) {
	291	/* XXX we need to handle this properly: increase the
	292	nfds available */
4f5e39ec	293	fatal("run: beforepoll_fn (%s) returns %d",i->desc,rv);
2fe58dfd SE	294	}
2fe58dfd SE	295	if (timeout<-1) {
4f5e39ec	296	fatal("run: beforepoll_fn (%s) set timeout to %d",timeout);
2fe58dfd SE	297	}
	298	idx+=nfds;
	299	remain-=nfds;
	300	i->nfds=nfds;
	301	}
	302	do {
7138d0c5	303	if (finished) break;
2fe58dfd SE	304	rv=poll(fds, idx, timeout);
	305	if (rv<0) {
	306	if (errno!=EINTR) {
	307	fatal_perror("run: poll");
	308	}
	309	}
	310	} while (rv<0);
7138d0c5	311	} while (!finished);
2fe58dfd SE	312	}
	313
	314	static void droppriv(void)
	315	{
	316	FILE *pf=NULL;
	317	pid_t p;
fe5e9cc4	318	int errfds[2];
2fe58dfd SE	319
	320	add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);
	321
b2a56f7c SE	322	/* Open the pidfile for writing now: we may be unable to do so
	323	once we drop privileges. */
	324	if (pidfile) {
	325	pf=fopen(pidfile,"w");
	326	if (!pf) {
	327	fatal_perror("cannot open pidfile \"%s\"",pidfile);
2fe58dfd	328	}
b2a56f7c SE	329	}
	330	if (!background && pf) {
	331	fprintf(pf,"%d\n",getpid());
	332	fclose(pf);
	333	}
	334
	335	/* Now drop privileges */
	336	if (uid!=0) {
	337	if (setuid(uid)!=0) {
	338	fatal_perror("can't set uid to \"%s\"",userid);
	339	}
	340	}
	341	if (background) {
2fe58dfd SE	342	p=fork();
	343	if (p>0) {
	344	if (pf) {
	345	/* Parent process - write pidfile, exit */
	346	fprintf(pf,"%d\n",p);
	347	fclose(pf);
	348	}
	349	exit(0);
	350	} else if (p==0) {
	351	/* Child process - all done, just carry on */
	352	if (pf) fclose(pf);
fe5e9cc4 SE	353	/* Close stdin and stdout; we don't need them any more.
	354	stderr is redirected to the system/log facility */
	355	if (pipe(errfds)!=0) {
	356	fatal_perror("can't create pipe for stderr");
	357	}
8dea8d37 SE	358	close(0);
8dea8d37 SE	359	close(1);
fe5e9cc4 SE	360	close(2);
	361	dup2(errfds[1],0);
	362	dup2(errfds[1],1);
	363	dup2(errfds[1],2);
b2a56f7c	364	secnet_is_daemon=True;
ff05a229	365	setsid();
fe5e9cc4	366	log_from_fd(errfds[0],"stderr",system_log);
2fe58dfd SE	367	} else {
	368	/* Error */
	369	fatal_perror("cannot fork");
	370	exit(1);
	371	}
2fe58dfd	372	}
7138d0c5 SE	373	secnet_pid=getpid();
7138d0c5 SE	374	}
2fe58dfd	375
7138d0c5 SE	376	static signal_notify_fn finish,ignore_hup;
	377	static void finish(void *st, int signum)
	378	{
	379	finished=True;
	380	Message(M_NOTICE,"%s [%d]: received %s\n",version,secnet_pid,(string_t)st);
	381	}
	382	static void ignore_hup(void *st, int signum)
	383	{
	384	Message(M_INFO,"%s [%d]: received SIGHUP\n",version,secnet_pid);
	385	return;
2fe58dfd SE	386	}
	387
	388	int main(int argc, char **argv)
	389	{
	390	dict_t *config;
	391
	392	enter_phase(PHASE_GETOPTS);
	393	parse_options(argc,argv);
	394
	395	enter_phase(PHASE_READCONFIG);
	396	config=read_conffile(configfile);
	397
	398	enter_phase(PHASE_SETUP);
	399	setup(config);
baa06aeb SE	400
	401	if (just_check_config) {
	402	Message(M_INFO,"configuration file check complete\n");
	403	exit(0);
	404	}
	405
	406	enter_phase(PHASE_GETRESOURCES);
	407	/* Appropriate phase hooks will have been run */
2fe58dfd SE	408
	409	enter_phase(PHASE_DROPPRIV);
	410	droppriv();
	411
7138d0c5	412	start_signal_handling();
fe5e9cc4 SE	413	request_signal_notification(SIGTERM,finish,safe_strdup("SIGTERM","run"));
	414	if (!background) request_signal_notification(SIGINT,finish,
	415	safe_strdup("SIGINT","run"));
7138d0c5	416	request_signal_notification(SIGHUP,ignore_hup,NULL);
042a8da9	417	enter_phase(PHASE_RUN);
2fe58dfd SE	418	run();
	419
	420	enter_phase(PHASE_SHUTDOWN);
7138d0c5	421	Message(M_NOTICE,"%s [%d]: finished\n",version,secnet_pid);
2fe58dfd SE	422
	423	return 0;
	424	}