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/* vi: set sw=4 ts=4: */ /* * freeramdisk implementation for busybox * * Copyright (C) 2000 and written by Emanuele Caratti <wiz@iol.it> * Adjusted a bit by Erik Andersen <andersen@codepoet.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <stdio.h> #include <string.h> #include <sys/types.h> #include <fcntl.h> #include <sys/ioctl.h> #include <stdlib.h> #include <unistd.h> #include "busybox.h" /* From linux/fs.h */ #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ extern int freeramdisk_main(int argc, char **argv) { int result; int fd; if (argc != 2) { bb_show_usage(); } fd = bb_xopen(argv[1], O_RDWR); result = ioctl(fd, BLKFLSBUF); #ifdef CONFIG_FEATURE_CLEAN_UP close(fd); #endif if (result < 0) { bb_perror_msg_and_die("failed ioctl on %s", argv[1]); } /* Don't bother closing. Exit does * that, so we can save a few bytes */ return EXIT_SUCCESS; } /* Local Variables: c-file-style: "linux" c-basic-offset: 4 tab-width: 4 End: */ |