AppFS
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Comment:Removed interruption support, there is no clean way to implement it
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SHA1: 39025b67ed47e421204cbec8e43352992a4ce139
User & Date: rkeene on 2014-11-12 05:09:40
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Context
2014-11-12
05:46
Fixed actual problem with interruptions (which was really unrelated) -- Tcl notifier thread is terminated on fork() called by fuse_main(), since we create a Tcl interpreter for testing before calling fuse_main() the notifier dies and is not restarted. We now terminate it before fork(). check-in: 0819a7a89c user: rkeene tags: trunk
05:09
Removed interruption support, there is no clean way to implement it check-in: 39025b67ed user: rkeene tags: trunk
2014-11-11
19:10
Added SIGUSR1 handling for terminating a thread check-in: 6eb9af02d5 user: rkeene tags: trunk
Changes
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Modified appfsd.c from [843bfcfd7e] to [30750361ba].

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}

/*
 * Hot-restart support
 */
/* Initiate a hot-restart */
static void appfs_hot_restart(void) {
	APPFS_DEBUG("Asked to initiate hot restart");

	appfs_tcl_ResetInterps();
	appfs_get_path_info_cache_flush(-1, -1);

	return;
}

/*
 * Terminate a thread and release resources
 */
static void appfs_thread_exit(void) {
	Tcl_Interp *interp;

	pthread_exit(NULL);

	interp = pthread_getspecific(interpKey);
	if (interp != NULL) {
		Tcl_DeleteInterp(interp);
	}

	return;
}

/*
 * Signal handler
 *         SIGHUP initiates a hot restart
 *         SIGUSR1 terminates the current thread
 */
static void appfs_signal_handler(int sig) {
	/* Do not handle signals until FUSE has been started */
	if (!appfs_fuse_started) {
		return;
	}

	/* Request to perform a "hot" restart */
	if (sig == SIGHUP) {
		appfs_hot_restart();
	}

	/* Request to terminate the current request/thread */
	if (sig == SIGUSR1) {
		appfs_thread_exit();
	}

	return;
}

/*
 * FUSE operations structure
 */
static struct fuse_operations appfs_operations = {
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		fprintf(stderr, "Hot-restart will not be available.\n");
	}

	/*
	 * Add FUSE arguments which we always supply
	 */
	fuse_opt_parse(&args, NULL, NULL, appfs_fuse_opt_cb);
	fuse_opt_add_arg(&args, "-odefault_permissions,fsname=appfs,subtype=appfsd,use_ino,kernel_cache,entry_timeout=0,attr_timeout=0,intr,big_writes,hard_remove");
	fuse_opt_add_arg(&args, "-odefault_permissions,fsname=appfs,subtype=appfsd,use_ino,kernel_cache,entry_timeout=0,attr_timeout=0,big_writes,hard_remove");

	if (getuid() == 0) {
		fuse_opt_parse(&args, NULL, NULL, NULL);
		fuse_opt_add_arg(&args, "-oallow_other");
	}

	/*
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