diff options
Diffstat (limited to 'util-linux/freeramdisk.c')
| -rw-r--r-- | util-linux/freeramdisk.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/util-linux/freeramdisk.c b/util-linux/freeramdisk.c new file mode 100644 index 000000000..426e13231 --- /dev/null +++ b/util-linux/freeramdisk.c @@ -0,0 +1,69 @@ +/* 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 <andersee@debian.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/mount.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <errno.h> +#include "internal.h" + + +static const char freeramdisk_usage[] = + "freeramdisk DEVICE\n\n" + "Frees all memory used by the specified ramdisk.\n"; + +extern int +freeramdisk_main(int argc, char **argv) +{ + char rname[256] = "/dev/ram"; + int f; + + if (argc >= 2 || ( argv[1] && *argv[1] == '-')) { + usage(freeramdisk_usage); + } + + if (argc >1) + strcpy(rname, argv[1]); + + if ((f = open(rname, O_RDWR)) == -1) { + fatalError( "freeramdisk: cannot open %s: %s", rname, strerror(errno)); + } + if (ioctl(f, BLKFLSBUF) < 0) { + fatalError( "freeramdisk: failed ioctl on %s: %s", rname, strerror(errno)); + } + close(f); + exit(TRUE); +} + +/* +Local Variables: +c-file-style: "linux" +c-basic-offset: 4 +tab-width: 4 +End: +*/ + |