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blockdev: add usage comment, no code changes

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-06-08 08:57:11 +02:00
parent 1230aec77a
commit 023ae75fc6
1 changed files with 11 additions and 1 deletions
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12
util-linux/blockdev.c
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@ -29,7 +29,17 @@
//usage: "\n --getsize64 Get device size in bytes"
//usage: "\n --flushbufs Flush buffers"
//usage: "\n --rereadpt Reread partition table"
// util-linux 2.31 also has:
// --getdiscardzeroes BLKDISCARDZEROES Get discard zeroes support status
// --getpbsz BLKPBSZGET Get physical block (sector) size
// --getiomin BLKIOMIN Get minimum I/O size
// --getioopt BLKIOOPT Get optimal I/O size
// --getalignoff BLKALIGNOFF Get alignment offset in bytes
// --getmaxsect BLKSECTGET Get max sectors per request
// --setra SECTORS BLKRASET Set readahead
// --getra BLKRAGET Get readahead
// --setfra SECTORS BLKFRASET Set filesystem readahead
// --getfra BLKFRAGET Get filesystem readahead
#include "libbb.h"
#include <linux/fs.h>