Differential D3867 Diff 9371 head/lib/libc/resolv/res_state.c

Changeset View

Standalone View

head/lib/libc/resolv/res_state.c

	Show All 20 Lines
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.			* SUCH DAMAGE.
	*			*
	* $FreeBSD$			* $FreeBSD$
	*/			*/

	#include <sys/types.h>			#include <sys/types.h>
				#include <sys/stat.h>
				#include <sys/time.h>
	#include <netinet/in.h>			#include <netinet/in.h>
	#include <arpa/nameser.h>			#include <arpa/nameser.h>
	#include <resolv.h>			#include <resolv.h>
	#include <stdlib.h>			#include <stdlib.h>

	#include "namespace.h"			#include "namespace.h"
	#include "reentrant.h"			#include "reentrant.h"
	#include "un-namespace.h"			#include "un-namespace.h"
	Show All 17 Lines
	}			}

	static void			static void
	res_keycreate(void)			res_keycreate(void)
	{			{
	res_thr_keycreated = thr_keycreate(&res_key, free_res) == 0;			res_thr_keycreated = thr_keycreate(&res_key, free_res) == 0;
	}			}

				static res_state
				res_check_reload(res_state statp)
				{
				struct timespec now;
				struct stat sb;

				if ((statp->options & RES_INIT) == 0 \|\| statp->reload_period == 0) {
				return (statp);
				}

				if (clock_gettime(CLOCK_MONOTONIC_FAST, &now) != 0 \|\|
				(now.tv_sec - statp->conf_stat) < statp->reload_period) {
				return (statp);
				}

				statp->conf_stat = now.tv_sec;
				if (stat(_PATH_RESCONF, &sb) == 0 &&
				(sb.st_mtim.tv_sec != statp->conf_mtim.tv_sec \|\|
				sb.st_mtim.tv_nsec != statp->conf_mtim.tv_nsec)) {
				statp->options &= ~RES_INIT;
				}

				return (statp);
				}

	res_state			res_state
	__res_state(void)			__res_state(void)
	{			{
	res_state statp;			res_state statp;

	if (thr_main() != 0)			if (thr_main() != 0)
	return (&_res);			return res_check_reload(&_res);

	if (thr_once(&res_init_once, res_keycreate) != 0 \|\|			if (thr_once(&res_init_once, res_keycreate) != 0 \|\|
	!res_thr_keycreated)			!res_thr_keycreated)
	return (&_res);			return (&_res);

	statp = thr_getspecific(res_key);			statp = thr_getspecific(res_key);
	if (statp != NULL)			if (statp != NULL)
	return (statp);			return res_check_reload(statp);
	statp = calloc(1, sizeof(*statp));			statp = calloc(1, sizeof(*statp));
	if (statp == NULL)			if (statp == NULL)
	return (&_res);			return (&_res);
	#ifdef __BIND_RES_TEXT			#ifdef __BIND_RES_TEXT
	statp->options = RES_TIMEOUT; /* Motorola, et al. */			statp->options = RES_TIMEOUT; /* Motorola, et al. */
	#endif			#endif
	if (thr_setspecific(res_key, statp) == 0)			if (thr_setspecific(res_key, statp) == 0)
	return (statp);			return (statp);
	free(statp);			free(statp);
	return (&_res);			return (&_res);
	}			}