mount: Add support for remounting without specifying device

    return 0;

}

static int get_mounts_dev_dir(const char *arg, char **dev, char **dir)

{

	FILE *f;

	char mount_dev[256];

	char mount_dir[256];

	char mount_type[256];

	char mount_opts[256];

	int mount_freq;

	int mount_passno;

	int match;

	f = fopen("/proc/mounts", "r");

	if (!f) {

		fprintf(stdout, "could not open /proc/mounts\n");

		return -1;

	}

	do {

		match = fscanf(f, "%255s %255s %255s %255s %d %d\n",

					   mount_dev, mount_dir, mount_type,

					   mount_opts, &mount_freq, &mount_passno);

		mount_dev[255] = 0;

		mount_dir[255] = 0;

		mount_type[255] = 0;

		mount_opts[255] = 0;

		if (match == 6 &&

			(strcmp(arg, mount_dev) == 0 ||

			 strcmp(arg, mount_dir) == 0)) {

			*dev = strdup(mount_dev);

			*dir = strdup(mount_dir);

			fclose(f);

			return 0;

		}

	} while (match != EOF);

	fclose(f);

	return -1;

}

int mount_main(int argc, char *argv[])

{

	char *type = NULL;

	char *dev = NULL;

	char *dir = NULL;

	int c;

	int loop = 0;

	if (rwflag & MS_TYPE)

		type = "none";

	if (optind + 2 != argc || type == NULL) {

	if (optind + 2 == argc) {

		dev = argv[optind];

		dir = argv[optind + 1];

	} else if (optind + 1 == argc && rwflag & MS_REMOUNT) {

		get_mounts_dev_dir(argv[optind], &dev, &dir);

	}

	if (dev == NULL || dir == NULL || type == NULL) {

		fprintf(stderr, "Usage: %s [-r] [-w] [-o options] [-t type] "

			"device directory\n", progname);

		exit(1);

	}

	return do_mount(argv[optind], argv[optind + 1], type, rwflag,

		        extra.str, loop);

	return do_mount(dev, dir, type, rwflag, extra.str, loop);

	/* We leak dev and dir in some cases, but we're about to exit */

}