-/*
- * $Source$
- * $Author$
- * $Header$
- *
- * Copyright (C) 1987 by the Massachusetts Institute of Technology
- * For copying and distribution information, please see the file
- * <mit-copyright.h>.
- *
- * MOIRA server process.
+/* $Id$
*
- * Most of this is stolen from ../gdb/tsr.c
+ * Moira server process.
*
- * You are in a maze of twisty little finite automata, all different.
- * Let the reader beware.
+ * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
*
*/
-static char *rcsid_mr_main_c = "$Header$";
-
#include <mit-copyright.h>
-#include <string.h>
-#include <stdio.h>
+#include "mr_server.h"
+
+#include <sys/socket.h>
+#include <sys/stat.h>
#include <sys/types.h>
-#include <sys/errno.h>
-#include <sys/signal.h>
+#include <sys/utsname.h>
#include <sys/wait.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <signal.h>
-#include "mr_server.h"
-#include <krb_et.h>
-#include <gdss_et.h>
+
+#include <netinet/in.h>
#include <arpa/inet.h>
-extern CONNECTION newconn, listencon;
+#include <ctype.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef HAVE_KRB4
+#include <krb.h>
+#endif
+#include <krb5.h>
-extern int nclients;
-extern client **clients, *cur_client;
+RCSID("$Header$");
-extern OPERATION listenop;
-extern LIST_OF_OPERATIONS op_list;
+client *cur_client;
-extern struct sockaddr_in client_addr;
-extern int client_addrlen;
-extern TUPLE client_tuple;
+char *whoami;
+char *takedown;
+FILE *journal;
-extern char *whoami;
-extern char buf1[BUFSIZ];
-extern char *takedown;
-extern int errno;
-extern FILE *journal;
+time_t now;
-extern time_t now;
+char *host;
+krb5_context context = NULL;
+char *krb_realm = NULL;
-char hostbuf[BUFSIZ], *host;
+/* Client array and associated data. This needs to be global for _list_users */
+client **clients;
+int nclients, clientssize;
-int do_listen(char *port);
-void do_reset_listen(void);
+int dormant;
+int child_exited_abnormally = 0;
+int child_pid, child_signal, child_status;
+
+void reapchild(int x);
+void godormant(int x);
+void gowakeup(int x);
void clist_append(client *cp);
-void oplist_append(LIST_OF_OPERATIONS *oplp, OPERATION op);
-void oplist_delete(LIST_OF_OPERATIONS oplp, OPERATION op);
void mr_setup_signals(void);
-int new_connection(void);
/*
- * Main MOIRA server loop.
+ * 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;
+ 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.
*/
- initialize_sms_error_table();
- initialize_krb_error_table();
- initialize_gdss_error_table();
+ mr_init();
set_com_err_hook(mr_com_err);
setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
}
}
- /*
- * GDB initialization.
- */
- if (gdb_init() != 0)
+ status = krb5_init_context(&context);
+ if (status)
+ {
+ com_err(whoami, status, "Initializing krb5 context.");
+ exit(1);
+ }
+
+ status = krb5_get_default_realm(context, &krb_realm);
+ if (status)
{
- com_err(whoami, 0, "GDB initialization failed.");
+ com_err(whoami, status, "Getting default Kerberos realm.");
exit(1);
}
- gdb_debug(0); /* this can be patched, if necessary, to enable */
- /* GDB level debugging .. */
- krb_realm = malloc(REALM_SZ);
- krb_get_lrealm(krb_realm, 1);
/*
* Database initialization. Only init if database should be open.
{
if ((status = mr_open_database()))
{
- com_err(whoami, status, " when trying to open database.");
+ com_err(whoami, status, "trying to open database.");
exit(1);
}
sanity_check_database();
/*
* Get moira server hostname for authentication
*/
- if (gethostname(hostbuf, sizeof(hostbuf)) < 0)
+ if (uname(&uts) < 0)
{
com_err(whoami, errno, "Unable to get local hostname");
exit(1);
}
- host = canonicalize_hostname(strsave(hostbuf));
+ host = canonicalize_hostname(xstrdup(uts.nodename));
for (p = host; *p && *p != '.'; p++)
{
if (isupper(*p))
* Set up client array handler.
*/
nclients = 0;
- clients = malloc(0);
+ clientssize = 10;
+ clients = xmalloc(clientssize * sizeof(client *));
mr_setup_signals();
journal = fopen(JOURNAL, "a");
if (!journal)
{
- com_err(whoami, errno, " while opening journal file");
+ com_err(whoami, errno, "opening journal file");
exit(1);
}
/*
* Establish template connection.
*/
- if ((status = do_listen(port)))
+ listener = mr_listen(port);
+ if (listener == -1)
{
- com_err(whoami, status, " while trying to create listening connection");
+ com_err(whoami, MR_ABORTED, "trying to create listening connection");
exit(1);
}
-
- op_list = create_list_of_operations(1, listenop);
+ 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_mr_main_c);
+ com_err(whoami, 0, rcsid);
if (dormant != ASLEEP)
send_zgram("MOIRA", "server started");
else
while (!takedown)
{
int i;
- /*
- * Block until something happens.
- */
- if (dormant == SLEEPY)
+ 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");
send_zgram("MOIRA", "database closed");
dormant = ASLEEP;
}
- else if (dormant == GROGGY)
- {
- mr_open_database();
- com_err(whoami, 0, "database open");
- mr_setup_signals();
- send_zgram("MOIRA", "database open again");
- dormant = AWAKE;
- }
- errno = 0;
- status = op_select_any(op_list, 0, NULL, NULL, NULL, NULL);
- if (status == -1)
+ /* 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, " error from op_select");
+ com_err(whoami, errno, "in select");
if (!inc_running || now - inc_started > INC_TIMEOUT)
next_incremental();
continue;
}
- else if (status != -2)
- {
- com_err(whoami, 0, " wrong return from op_select_any");
- continue;
- }
+
if (takedown)
break;
+
+ if (child_exited_abnormally)
+ {
+ critical_alert(whoami, "moirad", "%d: child exits with signal %d status %d",
+ child_pid, child_signal, child_status);
+ child_exited_abnormally = 0;
+ }
+
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; this comes first so
- * errno isn't tromped on.
- */
- if (OP_DONE(listenop))
+ /* Handle any new connections */
+ if (FD_ISSET(listener, &readfds))
{
- if (OP_STATUS(listenop) == OP_CANCELLED)
+ 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 (errno == EWOULDBLOCK)
- do_reset_listen();
- else
+ if (newconn + 1 > nfds)
+ nfds = newconn + 1;
+ FD_SET(newconn, &xreadfds);
+
+ /* Add a new client to the array */
+ nclients++;
+ if (nclients > clientssize)
{
- static int count = 0;
- com_err(whoami, errno, " error (%d) on listen", count);
- if (count++ > 10)
- exit(1);
+ clientssize = 2 * clientssize;
+ clients = xrealloc(clients, clientssize * sizeof(client *));
}
- }
- else if ((status = new_connection()))
- {
- com_err(whoami, errno, " Error on listening operation.");
- /*
- * Sleep here to prevent hosing?
- */
- }
- /* if the new connection is our only connection,
- * and the server is supposed to be down, then go
- * down now.
- */
- if ((dormant == AWAKE) && (nclients == 1) &&
- (stat(MOIRA_MOTD_FILE, &stbuf) == 0))
- {
- com_err(whoami, 0, "motd file exists, slumbertime");
- dormant = SLEEPY;
- }
- /* on new connection, if we are no longer supposed
- * to be down, then wake up.
- */
- if ((dormant == ASLEEP) && (stat(MOIRA_MOTD_FILE, &stbuf) == -1) &&
- (errno == ENOENT))
- {
- com_err(whoami, 0, "motd file no longer exists, waking up");
- dormant = GROGGY;
+
+ 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.
- */
- tardy = now - 30 * 60;
+ /* Handle any existing connections. */
for (i = 0; i < nclients; i++)
{
cur_client = clients[i];
- if (OP_DONE(clients[i]->pending_op))
+
+ 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))
{
- cur_client->last_time_used = now;
- do_client(cur_client);
+ 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;
+ }
}
- else if (clients[i]->last_time_used < tardy)
+
+ if (clients[i]->last_time_used < tardy)
{
com_err(whoami, 0, "Shutting down connection due to inactivity");
- shutdown(cur_client->con->in.fd, 2);
+ 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();
return 0;
}
-/*
- * Set up the template connection and queue the first accept.
- */
-
-int do_listen(char *port)
-{
- listencon = create_listening_connection(port);
-
- if (!listencon)
- return errno;
-
- listenop = create_operation();
- client_addrlen = sizeof(client_addr);
-
- start_accepting_client(listencon, listenop, &newconn, (char *)&client_addr,
- &client_addrlen, &client_tuple);
- return 0;
-}
-
-
-void do_reset_listen(void)
-{
- client_addrlen = sizeof(client_addr);
- start_accepting_client(listencon, listenop, &newconn, (char *)&client_addr,
- &client_addrlen, &client_tuple);
-}
-
-/*
- * This routine is called when a new connection comes in.
- *
- * It sets up a new client and adds it to the list of currently active clients.
- */
-int new_connection(void)
-{
- client *cp;
- static counter = 0;
-
- /*
- * Make sure there's been no error
- */
- if (OP_STATUS(listenop) != OP_COMPLETE)
- return errno;
-
- if (!newconn)
- return MR_NOT_CONNECTED;
-
- /*
- * Set up the new connection and reply to the client
- */
- cp = malloc(sizeof(client));
- memset(cp, 0, sizeof(*cp));
- cp->action = CL_ACCEPT;
- cp->con = newconn;
- cp->id = counter++;
- cp->args = NULL;
- cp->clname[0] = NULL;
- cp->reply.mr_argv = NULL;
- cp->first = NULL;
- cp->last = NULL;
- cp->last_time_used = now;
- newconn = NULL;
-
- cp->pending_op = create_operation();
- reset_operation(cp->pending_op);
- oplist_append(&op_list, cp->pending_op);
- cur_client = cp;
-
- /*
- * Add a new client to the array..
- */
- clist_append(cp);
-
- /*
- * Let him know we heard him.
- */
- start_replying_to_client(cp->pending_op, cp->con, GDB_ACCEPTED, "", "");
-
- cp->haddr = client_addr;
-
- /*
- * Log new connection.
- */
- 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" : "");
-
- /*
- * Get ready to accept the next connection.
- */
- reset_operation(listenop);
- client_addrlen = sizeof(client_addr);
-
- start_accepting_client(listencon, listenop, &newconn, (char *)&client_addr,
- &client_addrlen, &client_tuple);
- return 0;
-}
-
-/*
- * Add a new client to the known clients.
- */
-void clist_append(client *cp)
-{
- client **clients_n;
-
- nclients++;
- clients_n = malloc(nclients * sizeof(client *));
- memcpy(clients_n, clients, (nclients - 1) * sizeof(cp));
- clients_n[nclients - 1] = cp;
- free(clients);
- clients = clients_n;
- clients_n = NULL;
-}
-
-
-void clist_delete(client *cp)
-{
- client **clients_n, **scpp, **dcpp; /* source and dest client ptr ptr */
-
- int found_it = 0;
-
- clients_n = malloc((nclients - 1) * sizeof(client *));
- for (scpp = clients, dcpp = clients_n; scpp < clients + nclients; )
- {
- if (*scpp != cp)
- *dcpp++ = *scpp++;
- else
- {
- scpp++;
- if (found_it)
- abort();
- found_it = 1;
- }
- }
- --nclients;
- free(clients);
- clients = clients_n;
- clients_n = NULL;
- oplist_delete(op_list, cp->pending_op);
- reset_operation(cp->pending_op);
- delete_operation(cp->pending_op);
- sever_connection(cp->con);
- free(cp);
-}
-
-/*
- * Add a new operation to a list of operations.
- *
- * This should be rewritten to use realloc instead, since in most
- * cases it won't have to copy the array.
- */
-
-void oplist_append(LIST_OF_OPERATIONS *oplp, OPERATION op)
-{
- int count = (*oplp)->count + 1;
- LIST_OF_OPERATIONS newlist = (LIST_OF_OPERATIONS)
- db_alloc(size_of_list_of_operations(count));
- memcpy(newlist, *oplp, size_of_list_of_operations((*oplp)->count));
- newlist->count++;
- newlist->op[count - 1] = op;
- db_free(*oplp, size_of_list_of_operations(count - 1));
- *oplp = newlist;
-}
-
-void oplist_delete(LIST_OF_OPERATIONS oplp, OPERATION op)
-{
- OPERATION *s;
- int c;
-
- for (s = oplp->op, c = oplp->count; c; --c, ++s)
- {
- if (*s == op)
- {
- while (c > 0)
- {
- *s = *(s + 1);
- ++s;
- --c;
- }
- oplp->count--;
- return;
- }
- }
- abort();
-}
-
-
void reapchild(int x)
{
int status, pid;
if (pid == inc_pid)
inc_running = 0;
if (!takedown && (WTERMSIG(status) != 0 || WEXITSTATUS(status) != 0))
- com_err(whoami, 0, "%d: child exits with signal %d status %d",
- pid, WTERMSIG(status), WEXITSTATUS(status));
+ {
+ child_exited_abnormally = 1;
+ child_pid = pid;
+ child_signal = WTERMSIG(status);
+ child_status = WEXITSTATUS(status);
+ }
}
}
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)
andersk / moira.git / blobdiff