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Handle SIGHUP. Locking is still missing.

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This commit is contained in:
Andreas Gustafsson 2000-01-24 22:21:47 +00:00
parent 8cd870e3f5
commit b45b364f22
3 changed files with 63 additions and 6 deletions
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15
bin/named/include/named/server.h
View file

@ -24,6 +24,9 @@
#include <dns/types.h>
#define NS_EVENTCLASS ISC_EVENTCLASS(0x4E43)
#define NS_EVENT_RELOAD (NS_EVENTCLASS + 0)
/*
* Name server state. Better here than in lots of separate global variables.
*/
@ -51,6 +54,9 @@ struct ns_server {
isc_rwlock_t viewlock;
ns_interfacemgr_t * interfacemgr;
dns_db_t * roothints;
isc_mutex_t reload_event_lock;
isc_event_t * reload_event;
};
#define NS_SERVER_MAGIC 0x53564552 /* SVER */
@ -72,7 +78,12 @@ ns_server_destroy(ns_server_t **serverp);
*/
void
ns_server_fatal(isc_logmodule_t *module, isc_boolean_t want_core,
const char *format, ...);
ns_server_reloadwanted(ns_server_t *server);
/*
* Inform a server that a reload is wanted. This function
* may be called asynchronously, from outside the server's task.
* If a reload is already scheduled or in progress, the call
* is ignored.
*/
#endif /* NS_SERVER_H */

5
bin/named/main.c
View file

@ -291,10 +291,7 @@ main(int argc, char *argv[]) {
result = isc_app_run();
if (result == ISC_R_RELOAD) {
/*
* XXXRTH Replace this with something useful.
*/
printf("reload requested\n");
ns_server_reloadwanted(ns_g_server);
} else if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"isc_app_run(): %s",

49
bin/named/server.c
View file

@ -97,6 +97,7 @@ typedef struct {
} ns_load_t;
static void fatal(char *msg, isc_result_t result);
static void ns_server_reload(isc_task_t *task, isc_event_t *event);
/*
* Configure 'view' according to 'cctx'.
@ -717,6 +718,18 @@ ns_server_create(isc_mem_t *mctx, ns_server_t **serverp) {
CHECKFATAL(dns_rootns_create(mctx, &server->roothints),
"setting up root hints");
CHECKFATAL(isc_mutex_init(&server->reload_event_lock),
"initializing reload event lock");
server->reload_event =
isc_event_allocate(ns_g_mctx, server,
NS_EVENT_RELOAD,
ns_server_reload,
server,
sizeof(isc_event_t));
CHECKFATAL(server->reload_event == NULL ?
ISC_R_NOMEMORY : ISC_R_SUCCESS,
"allocating reload event");
/*
* Setup the server task, which is responsible for coordinating
@ -742,6 +755,8 @@ ns_server_destroy(ns_server_t **serverp) {
ns_server_t *server = *serverp;
REQUIRE(NS_SERVER_VALID(server));
isc_event_free(&server->reload_event);
INSIST(ISC_LIST_EMPTY(server->viewlist));
dns_zonemgr_destroy(&server->zonemgr);
@ -775,3 +790,37 @@ fatal(char *msg, isc_result_t result)
ISC_LOG_CRITICAL, "exiting (due to fatal error)");
exit(1);
}
static void
ns_server_reload(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
ns_server_t *server = (ns_server_t *) event->arg;
UNUSED(task);
result = load_configuration(ns_g_conffile, server);
if (result != DNS_R_SUCCESS) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"reloading configuration failed: %s",
isc_result_totext(result));
}
result = load_zones(server, ISC_FALSE);
if (result != DNS_R_SUCCESS) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"reloading zones failed: %s",
isc_result_totext(result));
}
LOCK(&server->reload_event_lock);
INSIST(server->reload_event == NULL);
server->reload_event = event;
UNLOCK(&server->reload_event_lock);
}
void
ns_server_reloadwanted(ns_server_t *server) {
LOCK(&server->reload_event_lock);
if (server->reload_event != NULL)
isc_task_send(server->task, &server->reload_event);
UNLOCK(&server->reload_event_lock);
}