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 @@ | |||
| 1 | /* vi: set sw=4 ts=4: */ | ||
| 2 | /* | ||
| 3 | * freeramdisk implementation for busybox | ||
| 4 | * | ||
| 5 | * Copyright (C) 2000 and written by Emanuele Caratti <wiz@iol.it> | ||
| 6 | * Adjusted a bit by Erik Andersen <andersee@debian.org> | ||
| 7 | * | ||
| 8 | * This program is free software; you can redistribute it and/or modify | ||
| 9 | * it under the terms of the GNU General Public License as published by | ||
| 10 | * the Free Software Foundation; either version 2 of the License, or | ||
| 11 | * (at your option) any later version. | ||
| 12 | * | ||
| 13 | * This program is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU General Public License | ||
| 19 | * along with this program; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| 21 | * | ||
| 22 | */ | ||
| 23 | |||
| 24 | #include <stdio.h> | ||
| 25 | #include <string.h> | ||
| 26 | #include <sys/mount.h> | ||
| 27 | #include <sys/types.h> | ||
| 28 | #include <sys/stat.h> | ||
| 29 | #include <fcntl.h> | ||
| 30 | #include <sys/ioctl.h> | ||
| 31 | #include <errno.h> | ||
| 32 | #include "internal.h" | ||
| 33 | |||
| 34 | |||
| 35 | static const char freeramdisk_usage[] = | ||
| 36 | "freeramdisk DEVICE\n\n" | ||
| 37 | "Frees all memory used by the specified ramdisk.\n"; | ||
| 38 | |||
| 39 | extern int | ||
| 40 | freeramdisk_main(int argc, char **argv) | ||
| 41 | { | ||
| 42 | char rname[256] = "/dev/ram"; | ||
| 43 | int f; | ||
| 44 | |||
| 45 | if (argc >= 2 || ( argv[1] && *argv[1] == '-')) { | ||
| 46 | usage(freeramdisk_usage); | ||
| 47 | } | ||
| 48 | |||
| 49 | if (argc >1) | ||
| 50 | strcpy(rname, argv[1]); | ||
| 51 | |||
| 52 | if ((f = open(rname, O_RDWR)) == -1) { | ||
| 53 | fatalError( "freeramdisk: cannot open %s: %s", rname, strerror(errno)); | ||
| 54 | } | ||
| 55 | if (ioctl(f, BLKFLSBUF) < 0) { | ||
| 56 | fatalError( "freeramdisk: failed ioctl on %s: %s", rname, strerror(errno)); | ||
| 57 | } | ||
| 58 | close(f); | ||
| 59 | exit(TRUE); | ||
| 60 | } | ||
| 61 | |||
| 62 | /* | ||
| 63 | Local Variables: | ||
| 64 | c-file-style: "linux" | ||
| 65 | c-basic-offset: 4 | ||
| 66 | tab-width: 4 | ||
| 67 | End: | ||
| 68 | */ | ||
| 69 | |||