diff options
| -rw-r--r-- | disk-utils/blockdev.8 | 120 | ||||
| -rw-r--r-- | disk-utils/blockdev.c | 10 |
2 files changed, 61 insertions, 69 deletions
diff --git a/disk-utils/blockdev.8 b/disk-utils/blockdev.8 index fa01da54..c3d5dfd7 100644 --- a/disk-utils/blockdev.8 +++ b/disk-utils/blockdev.8 @@ -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 +It is possible to give multiple devices and multiple commands. +.IP "\fB\-\-flushbufs\fP" +Flush buffers. +.IP "\fB\-\-getalignoff\fP" +Get alignment offset. +.IP "\fB\-\-getbsz\fP" 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 +.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). -.TP -.BI \--setfra " N" +.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). -.TP -.B \--getfra -Get filesystem readahead. -.TP -.B \--flushbufs -Flush buffers. -.TP -.B \--rereadpt -Reread partition table. +.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/. diff --git a/disk-utils/blockdev.c b/disk-utils/blockdev.c index 089405e9..27b1a0a2 100644 --- a/disk-utils/blockdev.c +++ b/disk-utils/blockdev.c @@ -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") |