| /* |
| * flushb.c --- This routine flushes the disk buffers for a disk |
| * |
| * Copyright 1997, 2000, by Theodore Ts'o. |
| * |
| * This program may be used under the provisions of the GNU Public |
| * License, *EXCEPT* that a binary copy of the executable may not be |
| * packaged as a part of binary package which is distributed as part |
| * of a Linux distribution. (Yes, this violates the Debian Free |
| * Software Guidelines of restricting its field of use. That's the |
| * point. I don't want this program being distributed in Debian, |
| * because I don't care to support it, and the maintainer, Yann |
| * Dirson, doesn't seem to pay attention to my wishes on this matter. |
| * So I'm deliberately adding this clause so it violates the Debian |
| * Free Software Guidelines to force him to take it out. (What part |
| * of THIS IS FOR MY OWN USE don't you understand? And no, I'm going |
| * to write a man page for it either. And don't file a bug about it |
| * or bug me about it.) If this doesn't work, I'll have to remove it |
| * from the upstream source distribution at the next release. End of |
| * Rant. :-) |
| * |
| * (BTW, use of flushb on some older 2.2 kernels on a heavily loaded |
| * system will corrupt filesystems.) |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include "../misc/nls-enable.h" |
| |
| /* For Linux, define BLKFLSBUF if necessary */ |
| #if (!defined(BLKFLSBUF) && defined(__linux__)) |
| #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ |
| #endif |
| |
| const char *progname; |
| |
| static void usage(void) |
| { |
| fprintf(stderr, _("Usage: %s disk\n"), progname); |
| exit(1); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int fd; |
| |
| progname = argv[0]; |
| if (argc != 2) |
| usage(); |
| |
| fd = open(argv[1], O_RDONLY, 0); |
| if (fd < 0) { |
| perror("open"); |
| exit(1); |
| } |
| /* |
| * Note: to reread the partition table, use the ioctl |
| * BLKRRPART instead of BLKFSLBUF. |
| */ |
| #ifdef BLKFLSBUF |
| if (ioctl(fd, BLKFLSBUF, 0) < 0) { |
| perror("ioctl BLKFLSBUF"); |
| exit(1); |
| } |
| return 0; |
| #else |
| fprintf(stderr, |
| _("BLKFLSBUF ioctl not supported! Can't flush buffers.\n")); |
| return 1; |
| #endif |
| } |