From 464df1d5e5ab1322e2dd0a7796939fff1aeefa9a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:49:25 +0200 Subject: Adding upstream version 1.47.0. Signed-off-by: Daniel Baumann --- e2fsck/flushb.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 e2fsck/flushb.c (limited to 'e2fsck/flushb.c') diff --git a/e2fsck/flushb.c b/e2fsck/flushb.c new file mode 100644 index 0000000..6100fc6 --- /dev/null +++ b/e2fsck/flushb.c @@ -0,0 +1,67 @@ +/* + * flushb.c --- This routine flushes the disk buffers for a disk + * + * Copyright 1997, 2000, by Theodore Ts'o. + * + * WARNING: use of flushb on some older 2.2 kernels on a heavily loaded + * system will corrupt filesystems. This program is not really useful + * beyond for benchmarking scripts. + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Public + * License. + * %End-Header% + */ + +#include "config.h" +#include +#include +#include +#include +#include +#include +#include +#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 +} -- cgit v1.2.3