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/* vi: set sw=4 ts=4: */ /* * freeramdisk and fdflush implementations for busybox * * Copyright (C) 2000 and written by Emanuele Caratti <wiz@iol.it> * Adjusted a bit by Erik Andersen <andersen@codepoet.org> * Unified with fdflush by Tito Ragusa <farmatito@tiscali.it> * * Licensed under GPLv2, see file LICENSE in this source tree. */ //usage:#define freeramdisk_trivial_usage //usage: "DEVICE" //usage:#define freeramdisk_full_usage "\n\n" //usage: "Free all memory used by the specified ramdisk" //usage: //usage:#define freeramdisk_example_usage //usage: "$ freeramdisk /dev/ram2\n" //usage: //usage:#define fdflush_trivial_usage //usage: "DEVICE" //usage:#define fdflush_full_usage "\n\n" //usage: "Force floppy disk drive to detect disk change" #include <sys/mount.h> #include "libbb.h" /* From <linux/fd.h> */ #define FDFLUSH _IO(2,0x4b) int freeramdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int freeramdisk_main(int argc UNUSED_PARAM, char **argv) { int fd; fd = xopen(single_argv(argv), O_RDWR); // Act like freeramdisk, fdflush, or both depending on configuration. ioctl_or_perror_and_die(fd, (ENABLE_FREERAMDISK && applet_name[1] == 'r') || !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH, NULL, "%s", argv[1]); if (ENABLE_FEATURE_CLEAN_UP) close(fd); return EXIT_SUCCESS; } |