[moira.git] / server / mr_main.c

/* $Id$
 *
 * Moira server process.
 *
 * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
 * For copying and distribution information, please see the file
 * <mit-copyright.h>.
 *
 */

#include <mit-copyright.h>
#include "mr_server.h"

#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <sys/wait.h>

#include <netinet/in.h>
#include <arpa/inet.h>

#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <krb.h>

RCSID("$Header$");

client *cur_client;

char *whoami;
char *takedown;
FILE *journal;

time_t now;

char *host;
char krb_realm[REALM_SZ];

/* Client array and associated data. This needs to be global for _list_users */
client **clients;
int nclients, clientssize;

int dormant;

void reapchild(int x);
void godormant(int x);
void gowakeup(int x);
void clist_append(client *cp);
void mr_setup_signals(void);

/*
 * Main Moira server loop.
 *
 * Initialize the world, then start accepting connections and
 * making progress on current connections.
 */

int main(int argc, char **argv)
{
  int status, i, listener;
  time_t tardy;
  char *port, *p;
  extern char *database;
  struct stat stbuf;
  struct utsname uts;
  fd_set readfds, writefds, xreadfds, xwritefds;
  int nfds, counter = 0;

  whoami = argv[0];
  /*
   * Error handler init.
   */
  mr_init();
  set_com_err_hook(mr_com_err);
  setvbuf(stderr, NULL, _IOLBF, BUFSIZ);

  port = strchr(MOIRA_SERVER, ':') + 1;

  for (i = 1; i < argc; i++)
    {
      if (!strcmp(argv[i], "-db") && i + 1 < argc)
	{
	  database = argv[i + 1];
	  i++;
	}
      else if (!strcmp(argv[i], "-p") && i + 1 < argc)
	{
	  port = argv[i + 1];
	  i++;
	}
      else
	{
	  com_err(whoami, 0, "Usage: moirad [-db database][-p port]");
	  exit(1);
	}
    }

  krb_get_lrealm(krb_realm, 1);

  /*
   * Database initialization.  Only init if database should be open.
   */

  if (stat(MOIRA_MOTD_FILE, &stbuf) != 0)
    {
      if ((status = mr_open_database()))
	{
	  com_err(whoami, status, "trying to open database.");
	  exit(1);
	}
      sanity_check_database();
    }
  else
    {
      dormant = ASLEEP;
      com_err(whoami, 0, "sleeping, not opening database");
    }

  sanity_check_queries();

  /*
   * Get moira server hostname for authentication
   */
  if (uname(&uts) < 0)
    {
      com_err(whoami, errno, "Unable to get local hostname");
      exit(1);
    }
  host = canonicalize_hostname(xstrdup(uts.nodename));
  for (p = host; *p && *p != '.'; p++)
    {
      if (isupper(*p))
	*p = tolower(*p);
    }
  *p = '\0';

  /*
   * Set up client array handler.
   */
  nclients = 0;
  clientssize = 10;
  clients = xmalloc(clientssize * sizeof(client *));

  mr_setup_signals();

  journal = fopen(JOURNAL, "a");
  if (!journal)
    {
      com_err(whoami, errno, "opening journal file");
      exit(1);
    }

  /*
   * Establish template connection.
   */
  if (!(listener = mr_listen(port)))
    {
      com_err(whoami, status, "trying to create listening connection");
      exit(1);
    }
  FD_ZERO(&xreadfds);
  FD_ZERO(&xwritefds);
  FD_SET(listener, &xreadfds);
  nfds = listener + 1;

  com_err(whoami, 0, "started (pid %d)", getpid());
  com_err(whoami, 0, rcsid);
  if (dormant != ASLEEP)
    send_zgram("MOIRA", "server started");
  else
    send_zgram("MOIRA", "server started, but database closed");

  /*
   * Run until shut down.
   */
  while (!takedown)
    {
      int i;
      struct timeval timeout = {60, 0}; /* 1 minute */

      /* If we're supposed to go down and we can, do it */
      if (((dormant == AWAKE) && (nclients == 0) &&
	   (stat(MOIRA_MOTD_FILE, &stbuf) == 0)) ||
	  (dormant == SLEEPY))
	{
	  mr_close_database();
	  com_err(whoami, 0, "database closed");
	  mr_setup_signals();
	  send_zgram("MOIRA", "database closed");
	  dormant = ASLEEP;
	}

      /* Block until something happens. */
      memcpy(&readfds, &xreadfds, sizeof(readfds));
      memcpy(&writefds, &xwritefds, sizeof(writefds));
      if (select(nfds, &readfds, &writefds, NULL, &timeout) == -1)
	{
	  if (errno != EINTR)
	    com_err(whoami, errno, "in select");
	  if (!inc_running || now - inc_started > INC_TIMEOUT)
	    next_incremental();
	  continue;
	}

      if (takedown)
	break;
      time(&now);
      if (!inc_running || now - inc_started > INC_TIMEOUT)
	next_incremental();
      tardy = now - 30 * 60;

      /* If we're asleep and we should wake up, do it */
      if ((dormant == ASLEEP) && (stat(MOIRA_MOTD_FILE, &stbuf) == -1) &&
	  (errno == ENOENT))
	{
	  mr_open_database();
	  com_err(whoami, 0, "database open");
	  mr_setup_signals();
	  send_zgram("MOIRA", "database open again");
	  dormant = AWAKE;
	}

      /* Handle any new connections */
      if (FD_ISSET(listener, &readfds))
	{
	  int newconn, addrlen = sizeof(struct sockaddr_in);
	  struct sockaddr_in addr;
	  client *cp;

	  newconn = accept(listener, (struct sockaddr *)&addr, &addrlen);
	  if (newconn == -1)
	    com_err(whoami, errno, "accepting new connection");
	  else if (newconn > 0)
	    {
	      if (newconn + 1 > nfds)
		nfds = newconn + 1;
	      FD_SET(newconn, &xreadfds);

	      /* Add a new client to the array */
	      nclients++;
	      if (nclients > clientssize)
		{
		  clientssize = 2 * clientssize;
		  clients = xrealloc(clients, clientssize * sizeof(client *));
		}

	      clients[nclients - 1] = cp = xmalloc(sizeof(client));
	      memset(cp, 0, sizeof(client));
	      cp->con = newconn;
	      cp->id = counter++;
	      cp->last_time_used = now;
	      cp->haddr = addr;
	      cp->tuplessize = 1;
	      cp->tuples = xmalloc(sizeof(mr_params));
	      memset(cp->tuples, 0, sizeof(mr_params));
	      cp->state = CL_ACCEPTING;
	      cp->version = 2;

	      cur_client = cp;
	      com_err(whoami, 0,
		      "New connection from %s port %d (now %d client%s)",
		      inet_ntoa(cp->haddr.sin_addr),
		      (int)ntohs(cp->haddr.sin_port),
		      nclients, nclients != 1 ? "s" : "");
	    }
	}

      /* Handle any existing connections. */
      for (i = 0; i < nclients; i++)
	{
	  cur_client = clients[i];

	  if (FD_ISSET(clients[i]->con, &writefds))
	    {
	      client_write(clients[i]);
	      if (!clients[i]->ntuples)
		{
		  FD_CLR(clients[i]->con, &xwritefds);
		  FD_SET(clients[i]->con, &xreadfds);
		}
	      clients[i]->last_time_used = now;
	    }

	  if (FD_ISSET(clients[i]->con, &readfds))
	    {
	      if (clients[i]->state == CL_ACCEPTING)
		{
		  switch(mr_cont_accept(clients[i]->con,
					&clients[i]->hsbuf,
					&clients[i]->hslen))
		    {
		    case -1:
		      break;

		    case 0:
		      clients[i]->state = CL_CLOSING;
		      break;

		    default:
		      clients[i]->state = CL_ACTIVE;
		      clients[i]->hsbuf = NULL;
		      break;
		    }
		}
	      else
		{
		  client_read(clients[i]);
		  if (clients[i]->ntuples)
		    {
		      FD_CLR(clients[i]->con, &xreadfds);
		      FD_SET(clients[i]->con, &xwritefds);
		    }
		  clients[i]->last_time_used = now;
		}
	    }

	  if (clients[i]->last_time_used < tardy)
	    {
	      com_err(whoami, 0, "Shutting down connection due to inactivity");
	      clients[i]->state = CL_CLOSING;
	    }

	  if (clients[i]->state == CL_CLOSING)
	    {
	      client *old;

	      com_err(whoami, 0, "Closed connection (now %d client%s, "
		      "%d queries)", nclients - 1, nclients != 2 ? "s" : "",
		      newqueries);

	      shutdown(clients[i]->con, 2);
	      close(clients[i]->con);
	      FD_CLR(clients[i]->con, &xreadfds);
	      FD_CLR(clients[i]->con, &xwritefds);
	      free_rtn_tuples(clients[i]);
	      free(clients[i]->tuples);
	      free(clients[i]->hsbuf);
	      old = clients[i];
	      clients[i] = clients[--nclients];
	      free(old);
	    }

	  cur_client = NULL;
	  if (takedown)
	    break;
	}
    }

  com_err(whoami, 0, "%s", takedown);
  if (dormant != ASLEEP)
    mr_close_database();
  send_zgram("MOIRA", takedown);
  return 0;
}

void reapchild(int x)
{
  int status, pid;

  while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
    {
      if (pid == inc_pid)
	inc_running = 0;
      if (!takedown && (WTERMSIG(status) != 0 || WEXITSTATUS(status) != 0))
	{
	  critical_alert("moirad", "%d: child exits with signal %d status %d",
			 pid, WTERMSIG(status), WEXITSTATUS(status));
	}
    }
}


void godormant(int x)
{
  switch (dormant)
    {
    case AWAKE:
    case GROGGY:
      com_err(whoami, 0, "requested to go dormant");
      break;
    case ASLEEP:
      com_err(whoami, 0, "already asleep");
      break;
    case SLEEPY:
      break;
    }
  dormant = SLEEPY;
}


void gowakeup(int x)
{
  switch (dormant)
    {
    case ASLEEP:
    case SLEEPY:
      com_err(whoami, 0, "Good morning");
      break;
    case AWAKE:
      com_err(whoami, 0, "already awake");
      break;
    case GROGGY:
      break;
    }
  dormant = GROGGY;
}


void mr_setup_signals(void)
{
  struct sigaction action;

  action.sa_flags = 0;
  sigemptyset(&action.sa_mask);

  /* There should probably be a few more of these. */

  action.sa_handler = sigshut;
  if ((sigaction(SIGTERM, &action, NULL) < 0) ||
      (sigaction(SIGINT, &action, NULL) < 0) ||
      (sigaction(SIGHUP, &action, NULL) < 0))
    {
      com_err(whoami, errno, "Unable to establish signal handlers.");
      exit(1);
    }

  action.sa_handler = godormant;
  if (sigaction(SIGUSR1, &action, NULL) < 0)
    {
      com_err(whoami, errno, "Unable to establish signal handlers.");
      exit(1);
    }

  action.sa_handler = gowakeup;
  if (sigaction(SIGUSR2, &action, NULL) < 0)
    {
      com_err(whoami, errno, "Unable to establish signal handlers.");
      exit(1);
    }

  action.sa_handler = SIG_IGN;
  if (sigaction(SIGPIPE, &action, NULL) < 0)
    {
      com_err(whoami, errno, "Unable to establish signal handlers.");
      exit(1);
    }

  action.sa_handler = reapchild;
  sigaddset(&action.sa_mask, SIGCHLD);
  if (sigaction(SIGCHLD, &action, NULL) < 0)
    {
      com_err(whoami, errno, "Unable to establish signal handlers.");
      exit(1);
    }
}
Commit	Line	Data
7ac48069	1	/* $Id$
0fa91a0a	2	*
7ac48069	3	* Moira server process.
0fa91a0a	4	*
7ac48069	5	* Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
	6	* For copying and distribution information, please see the file
	7	* <mit-copyright.h>.
5eaef520	8	*
0fa91a0a	9	*/
0fa91a0a	10
c801de4c	11	#include <mit-copyright.h>
7ac48069	12	#include "mr_server.h"
	13
	14	#include <sys/socket.h>
	15	#include <sys/stat.h>
589993be	16	#include <sys/types.h>
7ac48069	17	#include <sys/utsname.h>
554776b1	18	#include <sys/wait.h>
7ac48069	19
7ac48069	20	#include <netinet/in.h>
03c05291	21	#include <arpa/inet.h>
70d54e43	22
7ac48069	23	#include <ctype.h>
	24	#include <errno.h>
	25	#include <signal.h>
	26	#include <stdio.h>
	27	#include <stdlib.h>
	28	#include <string.h>
	29	#include <unistd.h>
	30
85330553	31	#include <krb.h>
85330553	32
7ac48069	33	RCSID("$Header$");
7ac48069	34
85330553	35	client *cur_client;
0fa91a0a	36
85330553	37	char *whoami;
	38	char *takedown;
	39	FILE *journal;
0fa91a0a	40
85330553	41	time_t now;
0fa91a0a	42
85330553	43	char *host;
85330553	44	char krb_realm[REALM_SZ];
70d54e43	45
85330553	46	/* Client array and associated data. This needs to be global for _list_users */
	47	client **clients;
	48	int nclients, clientssize;
0eb9f52f	49
85330553	50	int dormant;
3d0d0f07	51
7ac48069	52	void reapchild(int x);
	53	void godormant(int x);
	54	void gowakeup(int x);
03c05291	55	void clist_append(client *cp);
03c05291	56	void mr_setup_signals(void);
e448f08d	57
0ec57336	58	/*
59ec8dae	59	* Main Moira server loop.
0ec57336	60	*
	61	* Initialize the world, then start accepting connections and
	62	* making progress on current connections.
	63	*/
0fa91a0a	64
5eaef520	65	int main(int argc, char **argv)
0fa91a0a	66	{
85330553	67	int status, i, listener;
5eaef520	68	time_t tardy;
	69	char port, p;
	70	extern char *database;
	71	struct stat stbuf;
7ac48069	72	struct utsname uts;
85330553	73	fd_set readfds, writefds, xreadfds, xwritefds;
85330553	74	int nfds, counter = 0;
5eaef520	75
	76	whoami = argv[0];
	77	/*
	78	* Error handler init.
	79	*/
85330553	80	mr_init();
5eaef520	81	set_com_err_hook(mr_com_err);
	82	setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
	83
	84	port = strchr(MOIRA_SERVER, ':') + 1;
	85
	86	for (i = 1; i < argc; i++)
	87	{
	88	if (!strcmp(argv[i], "-db") && i + 1 < argc)
	89	{
	90	database = argv[i + 1];
	91	i++;
5dbd09a0	92	}
5eaef520	93	else if (!strcmp(argv[i], "-p") && i + 1 < argc)
	94	{
	95	port = argv[i + 1];
	96	i++;
f6cc38de	97	}
5eaef520	98	else
	99	{
	100	com_err(whoami, 0, "Usage: moirad [-db database][-p port]");
3d0d0f07	101	exit(1);
3d0d0f07	102	}
5eaef520	103	}
5eaef520	104
5eaef520	105	krb_get_lrealm(krb_realm, 1);
	106
	107	/*
	108	* Database initialization. Only init if database should be open.
	109	*/
	110
	111	if (stat(MOIRA_MOTD_FILE, &stbuf) != 0)
	112	{
	113	if ((status = mr_open_database()))
	114	{
85330553	115	com_err(whoami, status, "trying to open database.");
5eaef520	116	exit(1);
2f4ff9cd	117	}
5eaef520	118	sanity_check_database();
	119	}
	120	else
	121	{
	122	dormant = ASLEEP;
	123	com_err(whoami, 0, "sleeping, not opening database");
	124	}
2f4ff9cd	125
5eaef520	126	sanity_check_queries();
	127
	128	/*
	129	* Get moira server hostname for authentication
	130	*/
7ac48069	131	if (uname(&uts) < 0)
5eaef520	132	{
	133	com_err(whoami, errno, "Unable to get local hostname");
	134	exit(1);
	135	}
e688520a	136	host = canonicalize_hostname(xstrdup(uts.nodename));
5eaef520	137	for (p = host; p && p != '.'; p++)
	138	{
	139	if (isupper(*p))
	140	p = tolower(p);
	141	}
	142	*p = '\0';
	143
	144	/*
	145	* Set up client array handler.
	146	*/
	147	nclients = 0;
85330553	148	clientssize = 10;
e688520a	149	clients = xmalloc(clientssize * sizeof(client *));
5eaef520	150
	151	mr_setup_signals();
	152
	153	journal = fopen(JOURNAL, "a");
	154	if (!journal)
	155	{
85330553	156	com_err(whoami, errno, "opening journal file");
5eaef520	157	exit(1);
	158	}
	159
	160	/*
	161	* Establish template connection.
	162	*/
85330553	163	if (!(listener = mr_listen(port)))
5eaef520	164	{
85330553	165	com_err(whoami, status, "trying to create listening connection");
5eaef520	166	exit(1);
5eaef520	167	}
85330553	168	FD_ZERO(&xreadfds);
	169	FD_ZERO(&xwritefds);
	170	FD_SET(listener, &xreadfds);
	171	nfds = listener + 1;
5eaef520	172
5eaef520	173	com_err(whoami, 0, "started (pid %d)", getpid());
7ac48069	174	com_err(whoami, 0, rcsid);
5eaef520	175	if (dormant != ASLEEP)
	176	send_zgram("MOIRA", "server started");
	177	else
	178	send_zgram("MOIRA", "server started, but database closed");
	179
	180	/*
	181	* Run until shut down.
	182	*/
	183	while (!takedown)
	184	{
44d12d58	185	int i;
9294e804	186	struct timeval timeout = {60, 0}; /* 1 minute */
85330553	187
85330553	188	/* If we're supposed to go down and we can, do it */
59ad5a76	189	if (((dormant == AWAKE) && (nclients == 0) &&
	190	(stat(MOIRA_MOTD_FILE, &stbuf) == 0)) \|\|
	191	(dormant == SLEEPY))
5eaef520	192	{
	193	mr_close_database();
	194	com_err(whoami, 0, "database closed");
	195	mr_setup_signals();
	196	send_zgram("MOIRA", "database closed");
	197	dormant = ASLEEP;
	198	}
589993be	199
85330553	200	/* Block until something happens. */
	201	memcpy(&readfds, &xreadfds, sizeof(readfds));
	202	memcpy(&writefds, &xwritefds, sizeof(writefds));
9294e804	203	if (select(nfds, &readfds, &writefds, NULL, &timeout) == -1)
5eaef520	204	{
5eaef520	205	if (errno != EINTR)
85330553	206	com_err(whoami, errno, "in select");
5eaef520	207	if (!inc_running \|\| now - inc_started > INC_TIMEOUT)
	208	next_incremental();
	209	continue;
	210	}
85330553	211
5eaef520	212	if (takedown)
	213	break;
	214	time(&now);
	215	if (!inc_running \|\| now - inc_started > INC_TIMEOUT)
	216	next_incremental();
85330553	217	tardy = now - 30 * 60;
	218
	219	/* If we're asleep and we should wake up, do it */
	220	if ((dormant == ASLEEP) && (stat(MOIRA_MOTD_FILE, &stbuf) == -1) &&
	221	(errno == ENOENT))
	222	{
	223	mr_open_database();
	224	com_err(whoami, 0, "database open");
	225	mr_setup_signals();
	226	send_zgram("MOIRA", "database open again");
	227	dormant = AWAKE;
	228	}
5eaef520	229
85330553	230	/* Handle any new connections */
85330553	231	if (FD_ISSET(listener, &readfds))
5eaef520	232	{
8691463b	233	int newconn, addrlen = sizeof(struct sockaddr_in);
85330553	234	struct sockaddr_in addr;
	235	client *cp;
	236
8691463b	237	newconn = accept(listener, (struct sockaddr *)&addr, &addrlen);
85330553	238	if (newconn == -1)
	239	com_err(whoami, errno, "accepting new connection");
	240	else if (newconn > 0)
5eaef520	241	{
85330553	242	if (newconn + 1 > nfds)
	243	nfds = newconn + 1;
	244	FD_SET(newconn, &xreadfds);
	245
	246	/* Add a new client to the array */
	247	nclients++;
	248	if (nclients > clientssize)
5eaef520	249	{
85330553	250	clientssize = 2 * clientssize;
85330553	251	clients = xrealloc(clients, clientssize * sizeof(client *));
0fa91a0a	252	}
85330553	253
	254	clients[nclients - 1] = cp = xmalloc(sizeof(client));
	255	memset(cp, 0, sizeof(client));
	256	cp->con = newconn;
	257	cp->id = counter++;
	258	cp->last_time_used = now;
	259	cp->haddr = addr;
	260	cp->tuplessize = 1;
	261	cp->tuples = xmalloc(sizeof(mr_params));
	262	memset(cp->tuples, 0, sizeof(mr_params));
8691463b	263	cp->state = CL_ACCEPTING;
c44ddfa7	264	cp->version = 2;
85330553	265
	266	cur_client = cp;
	267	com_err(whoami, 0,
	268	"New connection from %s port %d (now %d client%s)",
	269	inet_ntoa(cp->haddr.sin_addr),
	270	(int)ntohs(cp->haddr.sin_port),
	271	nclients, nclients != 1 ? "s" : "");
5eaef520	272	}
0fa91a0a	273	}
5eaef520	274
85330553	275	/* Handle any existing connections. */
5eaef520	276	for (i = 0; i < nclients; i++)
	277	{
	278	cur_client = clients[i];
85330553	279
	280	if (FD_ISSET(clients[i]->con, &writefds))
	281	{
	282	client_write(clients[i]);
	283	if (!clients[i]->ntuples)
	284	{
	285	FD_CLR(clients[i]->con, &xwritefds);
85330553	286	FD_SET(clients[i]->con, &xreadfds);
	287	}
	288	clients[i]->last_time_used = now;
	289	}
	290
	291	if (FD_ISSET(clients[i]->con, &readfds))
5eaef520	292	{
8691463b	293	if (clients[i]->state == CL_ACCEPTING)
	294	{
	295	switch(mr_cont_accept(clients[i]->con,
	296	&clients[i]->hsbuf,
	297	&clients[i]->hslen))
	298	{
	299	case -1:
	300	break;
	301
	302	case 0:
	303	clients[i]->state = CL_CLOSING;
	304	break;
	305
	306	default:
	307	clients[i]->state = CL_ACTIVE;
	308	clients[i]->hsbuf = NULL;
	309	break;
	310	}
	311	}
	312	else
	313	{
	314	client_read(clients[i]);
	315	if (clients[i]->ntuples)
	316	{
	317	FD_CLR(clients[i]->con, &xreadfds);
	318	FD_SET(clients[i]->con, &xwritefds);
	319	}
	320	clients[i]->last_time_used = now;
	321	}
5eaef520	322	}
85330553	323
85330553	324	if (clients[i]->last_time_used < tardy)
5eaef520	325	{
5eaef520	326	com_err(whoami, 0, "Shutting down connection due to inactivity");
8691463b	327	clients[i]->state = CL_CLOSING;
85330553	328	}
85330553	329
8691463b	330	if (clients[i]->state == CL_CLOSING)
85330553	331	{
	332	client *old;
	333
	334	com_err(whoami, 0, "Closed connection (now %d client%s, "
	335	"%d queries)", nclients - 1, nclients != 2 ? "s" : "",
	336	newqueries);
	337
	338	shutdown(clients[i]->con, 2);
	339	close(clients[i]->con);
	340	FD_CLR(clients[i]->con, &xreadfds);
	341	FD_CLR(clients[i]->con, &xwritefds);
92ced3ed	342	free_rtn_tuples(clients[i]);
85330553	343	free(clients[i]->tuples);
8691463b	344	free(clients[i]->hsbuf);
85330553	345	old = clients[i];
	346	clients[i] = clients[--nclients];
	347	free(old);
5eaef520	348	}
85330553	349
5eaef520	350	cur_client = NULL;
	351	if (takedown)
	352	break;
	353	}
	354	}
85330553	355
5eaef520	356	com_err(whoami, 0, "%s", takedown);
	357	if (dormant != ASLEEP)
	358	mr_close_database();
	359	send_zgram("MOIRA", takedown);
	360	return 0;
70d54e43	361	}
70d54e43	362
5eaef520	363	void reapchild(int x)
554776b1	364	{
5eaef520	365	int status, pid;
	366
	367	while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
	368	{
	369	if (pid == inc_pid)
	370	inc_running = 0;
	371	if (!takedown && (WTERMSIG(status) != 0 \|\| WEXITSTATUS(status) != 0))
71c89283	372	{
e4342467	373	critical_alert("moirad", "%d: child exits with signal %d status %d",
71c89283	374	pid, WTERMSIG(status), WEXITSTATUS(status));
71c89283	375	}
554776b1	376	}
554776b1	377	}
589993be	378
589993be	379
5eaef520	380	void godormant(int x)
589993be	381	{
5eaef520	382	switch (dormant)
5eaef520	383	{
589993be	384	case AWAKE:
589993be	385	case GROGGY:
5eaef520	386	com_err(whoami, 0, "requested to go dormant");
5eaef520	387	break;
589993be	388	case ASLEEP:
5eaef520	389	com_err(whoami, 0, "already asleep");
5eaef520	390	break;
589993be	391	case SLEEPY:
5eaef520	392	break;
589993be	393	}
5eaef520	394	dormant = SLEEPY;
589993be	395	}
	396
	397
5eaef520	398	void gowakeup(int x)
589993be	399	{
5eaef520	400	switch (dormant)
5eaef520	401	{
589993be	402	case ASLEEP:
589993be	403	case SLEEPY:
5eaef520	404	com_err(whoami, 0, "Good morning");
5eaef520	405	break;
589993be	406	case AWAKE:
5eaef520	407	com_err(whoami, 0, "already awake");
5eaef520	408	break;
589993be	409	case GROGGY:
5eaef520	410	break;
589993be	411	}
5eaef520	412	dormant = GROGGY;
589993be	413	}
083a6e94	414
5eaef520	415
03c05291	416	void mr_setup_signals(void)
083a6e94	417	{
5eaef520	418	struct sigaction action;
	419
	420	action.sa_flags = 0;
	421	sigemptyset(&action.sa_mask);
03c05291	422
5eaef520	423	/* There should probably be a few more of these. */
03c05291	424
5eaef520	425	action.sa_handler = sigshut;
	426	if ((sigaction(SIGTERM, &action, NULL) < 0) \|\|
	427	(sigaction(SIGINT, &action, NULL) < 0) \|\|
	428	(sigaction(SIGHUP, &action, NULL) < 0))
	429	{
03c05291	430	com_err(whoami, errno, "Unable to establish signal handlers.");
03c05291	431	exit(1);
083a6e94	432	}
e448f08d	433
5eaef520	434	action.sa_handler = godormant;
	435	if (sigaction(SIGUSR1, &action, NULL) < 0)
	436	{
03c05291	437	com_err(whoami, errno, "Unable to establish signal handlers.");
	438	exit(1);
	439	}
e448f08d	440
5eaef520	441	action.sa_handler = gowakeup;
	442	if (sigaction(SIGUSR2, &action, NULL) < 0)
	443	{
03c05291	444	com_err(whoami, errno, "Unable to establish signal handlers.");
	445	exit(1);
	446	}
e448f08d	447
44762a3f	448	action.sa_handler = SIG_IGN;
	449	if (sigaction(SIGPIPE, &action, NULL) < 0)
	450	{
	451	com_err(whoami, errno, "Unable to establish signal handlers.");
	452	exit(1);
	453	}
	454
5eaef520	455	action.sa_handler = reapchild;
	456	sigaddset(&action.sa_mask, SIGCHLD);
	457	if (sigaction(SIGCHLD, &action, NULL) < 0)
	458	{
03c05291	459	com_err(whoami, errno, "Unable to establish signal handlers.");
	460	exit(1);
	461	}
	462	}