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blockdev: sync man page with code 

Signed-off-by: Karel Zak <kzak@redhat.com>
This commit is contained in:
Karel Zak 2010-08-24 12:59:41 +02:00
parent 9ef30d6178
commit 455fdf4af8
2 changed files with 63 additions and 71 deletions
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124
disk-utils/blockdev.8
View File

@ -3,90 +3,82 @@
.\" Copyright 2007 Karel Zak <kzak@redhat.com>
.\"
.\" May be distributed under the GNU General Public License
.TH BLOCKDEV 8 "Jun 2007" ""
.TH BLOCKDEV 8 "Aug 2010" ""
.SH NAME
blockdev \- call block device ioctls from the command line
.SH SYNOPSIS
.B blockdev
.RI [ options ]
.I commands devices
.RB [ \-q ]
.RB [ \-v ]
.IR command
.RI [ command ...]
.IR device
.RI [ device ...]
.br
.B blockdev
.B \-\-report
.RI [ devices ]
.RI [ device ...]
.SH DESCRIPTION
The utility
.B blockdev
allows one to call block device ioctls from the command line.
.SH OPTIONS
.TP
.B \-V
.IP "\fB\-V\fP"
Print version and exit.
.TP
.B \-q
.IP "\fB\-q\fP"
Be quiet.
.TP
.B \-v
.IP "\fB\-v\fP"
Be verbose.
.TP
.B \-\-report
Print a report for
.IR devices .
Note that the partition StartSec is in 512-byte sectors.
.IP "\fB\-\-report\fP"
Print a report for the specified device. It is possible to give multiple
devices. If none is given, all devices which appear in /proc/partitions are
shown. Note that the partition StartSec is in 512-byte sectors.
.SH COMMANDS
.TP
.B \--setro
Set read-only.
.TP
.B \--setrw
Set read-write.
.TP
.B \--getro
Get read-only. Print 1 if the device is read-only, 0 otherwise.
.TP
.B \--getss
Print sectorsize in bytes - usually 512.
.TP
.B \--getbsz
Print blocksize in bytes.
.TP
.BI \--setbsz " N"
Set blocksize to
.I N
bytes.
.TP
.B \--getsize
Print device size in sectors (BLKGETSIZE). Deprecated in favor of the
.B \--getsz
option.
.TP
.B \--getsize64
Print device size in bytes (BLKGETSIZE64)
.TP
.B \--getsz
Get size in 512-byte sectors (BLKGETSIZE64 / 512).
.TP
.BI \--setra " N"
Set readahead to
.I N
512-byte sectors.
.TP
.B \--getra
Print readahead (in 512-byte sectors).
.TP
.BI \--setfra " N"
Set filesystem readahead (same like --setra on 2.6 kernels).
.TP
.B \--getfra
Get filesystem readahead.
.TP
.B \--flushbufs
It is possible to give multiple devices and multiple commands.
.IP "\fB\-\-flushbufs\fP"
Flush buffers.
.TP
.B \--rereadpt
Reread partition table.
.IP "\fB\-\-getalignoff\fP"
Get alignment offset.
.IP "\fB\-\-getbsz\fP"
Print blocksize in bytes.
.IP "\fB\-\-getdiscardzeroes\fP"
Get discard zeroes support status.
.IP "\fB\-\-getfra\fP"
Get filesystem readahead in 512-byte sectors.
.IP "\fB\-\-getiomin\fP"
Get minimum I/O size.
.IP "\fB\-\-getioopt\fP"
Get optimal I/O size.
.IP "\fB\-\-getmaxsect\fP"
Get max sectors per request
.IP "\fB\-\-getpbsz\fP"
Get physical block (sector) size.
.IP "\fB\-\-getra\fP"
Print readahead (in 512-byte sectors).
.IP "\fB\-\-getro\fP"
Get read-only. Print 1 if the device is read-only, 0 otherwise.
.IP "\fB\-\-getsize64\fP"
Print device size in bytes.
.IP "\fB\-\-getsize\fP"
Print device size (32-bit!) in sectors. Deprecated in favor of the --getsz option.
.IP "\fB\-\-getss\fP"
Print sectorsize in bytes - usually 512.
.IP "\fB\-\-getsz\fP"
Get size in 512-byte sectors.
.IP "\fB\-\-rereadpt\fP"
Seread partition table
.IP "\fB\-\-setbsz\fP \fIbytes\fP"
Set blocksize.
.IP "\fB\-\-setfra\fP \fIsectors\fP"
Set filesystem readahead (same like --setra on 2.6 kernels).
.IP "\fB\-\-setra\fP \fIsectors\fP"
Set readahead (in 512-byte sectors).
.IP "\fB\-\-setro\fP"
Set read-only.
.IP "\fB\-\-setrw\fP"
Set read-write.
.SH AUTHOR
blockdev was written by Andries E. Brouwer.
blockdev was written by Andries E. Brouwer and rewrittent by Karel Zak.
.SH AVAILABILITY
The blockdev command is part of the util-linux-ng package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

10
disk-utils/blockdev.c
View File

@ -109,7 +109,7 @@ struct bdc bdcms[] =
.name = "--getalignoff",
.argtype = ARG_INT,
.argval = -1,
.help = N_("get alignment offset")
.help = N_("get alignment offset in bytes")
},{
IOCTL_ENTRY(BLKSECTGET),
.name = "--getmaxsect",
@ -125,7 +125,7 @@ struct bdc bdcms[] =
},{
IOCTL_ENTRY(BLKBSZSET),
.name = "--setbsz",
.argname = "BLOCKSIZE",
.argname = "<bytes>",
.argtype = ARG_INT,
.flags = FL_NORESULT,
.help = N_("set blocksize")
@ -134,7 +134,7 @@ struct bdc bdcms[] =
.name = "--getsize",
.argtype = ARG_ULONG,
.argval = -1,
.help = N_("get 32-bit sector count")
.help = N_("get 32-bit sector count (deprecated, use --getsz)")
},{
IOCTL_ENTRY(BLKGETSIZE64),
.name = "--getsize64",
@ -144,7 +144,7 @@ struct bdc bdcms[] =
},{
IOCTL_ENTRY(BLKRASET),
.name = "--setra",
.argname = "READAHEAD",
.argname = "<sectors>",
.argtype = ARG_INT,
.flags = FL_NOPTR | FL_NORESULT,
.help = N_("set readahead")
@ -157,7 +157,7 @@ struct bdc bdcms[] =
},{
IOCTL_ENTRY(BLKFRASET),
.name = "--setfra",
.argname = "FSREADAHEAD",
.argname = "<sectors>",
.argtype = ARG_INT,
.flags = FL_NOPTR | FL_NORESULT,
.help = N_("set filesystem readahead")