Differential D17934 Diff 50272 head/lib/libc/net/nsdispatch.c

Changeset View

Standalone View

head/lib/libc/net/nsdispatch.c

	Show First 20 Lines • Show All 329 Lines • ▼ Show 20 Lines
	* The first time nsdispatch is called (during a process's lifetime,			* The first time nsdispatch is called (during a process's lifetime,
	* or after nsswitch.conf has been updated), nss_configure will			* or after nsswitch.conf has been updated), nss_configure will
	* prepare global data needed by NSS.			* prepare global data needed by NSS.
	*/			*/
	static int			static int
	nss_configure(void)			nss_configure(void)
	{			{
	static time_t confmod;			static time_t confmod;
				static int already_initialized = 0;
	struct stat statbuf;			struct stat statbuf;
	int result, isthreaded;			int result, isthreaded;
	const char *path;			const char *path;
	#ifdef NS_CACHING			#ifdef NS_CACHING
	void *handle;			void *handle;
	#endif			#endif

	result = 0;			result = 0;
	isthreaded = __isthreaded;			isthreaded = __isthreaded;
	#if defined(_NSS_DEBUG) && defined(_NSS_SHOOT_FOOT)			#if defined(_NSS_DEBUG) && defined(_NSS_SHOOT_FOOT)
	/* NOTE WELL: THIS IS A SECURITY HOLE. This must only be built			/* NOTE WELL: THIS IS A SECURITY HOLE. This must only be built
	* for debugging purposes and MUST NEVER be used in production.			* for debugging purposes and MUST NEVER be used in production.
	*/			*/
	path = getenv("NSSWITCH_CONF");			path = getenv("NSSWITCH_CONF");
	if (path == NULL)			if (path == NULL)
	#endif			#endif
	path = _PATH_NS_CONF;			path = _PATH_NS_CONF;
				#ifndef NS_REREAD_CONF
				/*
				* Define NS_REREAD_CONF to have nsswitch notice changes
				* to nsswitch.conf(5) during runtime. This involves calling
				* stat(2) every time, which can result in performance hit.
				*/
				if (already_initialized)
				return (0);
				already_initialized = 1;
				#endif /* NS_REREAD_CONF */
	if (stat(path, &statbuf) != 0)			if (stat(path, &statbuf) != 0)
	return (0);			return (0);
	if (statbuf.st_mtime <= confmod)			if (statbuf.st_mtime <= confmod)
	return (0);			return (0);
	if (isthreaded) {			if (isthreaded) {
	(void)_pthread_rwlock_unlock(&nss_lock);			(void)_pthread_rwlock_unlock(&nss_lock);
	result = _pthread_rwlock_wrlock(&nss_lock);			result = _pthread_rwlock_wrlock(&nss_lock);
	if (result != 0)			if (result != 0)
	▲ Show 20 Lines • Show All 410 Lines • Show Last 20 Lines