{"id":214,"date":"2018-03-12T14:13:33","date_gmt":"2018-03-12T06:13:33","guid":{"rendered":"http:\/\/www.max-shu.com\/blog\/?p=214"},"modified":"2018-03-12T14:13:33","modified_gmt":"2018-03-12T06:13:33","slug":"%e7%94%a8bmap%e6%98%be%e7%a4%balinux%e6%96%87%e4%bb%b6%e7%9a%84%e6%89%87%e5%8c%ba%e4%bf%a1%e6%81%af%e3%80%81%e7%a2%8e%e7%89%87%e5%8c%96%e4%bf%a1%e6%81%af%e3%80%81%e4%bb%a5%e5%8f%8a%e5%9c%a8%e6%96%87","status":"publish","type":"post","link":"http:\/\/www.max-shu.com\/blog\/?p=214","title":{"rendered":"\u7528bmap\u663e\u793aLinux\u6587\u4ef6\u7684\u6247\u533a\u4fe1\u606f\u3001\u788e\u7247\u5316\u4fe1\u606f\u3001\u4ee5\u53ca\u5728\u6587\u4ef6\u4e2d\u52a0\u5165slack\u4fe1\u606f\u6216\u81ea\u5df1\u7684\u4fdd\u5bc6\u4fe1\u606f"},"content":{"rendered":"
\u4ec0\u4e48\u662flinux\u6587\u4ef6\u7684slack\uff1a<\/b><\/div>\n
linux\u6587\u4ef6\u7cfb\u7edf\u662f\u4ee5\u5757\uff08CentOS\u9ed8\u8ba4\u4e3a4096\u5b57\u8282\uff09\u4e3a\u5355\u4f4d\u6765\u5206\u914d\u786c\u76d8\u7a7a\u95f4\u7684\uff0c\u6240\u4ee5\u5f53\u6587\u4ef6\u5927\u5c0f\u4e0d\u662f\u5757\u5927\u5c0f\u7684\u6574\u6570\u500d\u65f6\uff0c\u5728\u6587\u4ef6\u7684\u5c3e\u90e8\u5c31\u6709\u7a7a\u51fa\u6765\u7684\u7a7a\u95f4\u53ef\u4ee5\u4f7f\u7528\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u6587\u4ef6\u7cfb\u7edf\u5b8c\u6574\u6027\uff0c\u8fd9\u4e2a\u7a7a\u95f4\u5c31\u53ebslack\u3002\u5f53\u7136\u5982\u679c\u8be5\u6587\u4ef6\u5927\u5c0f\u53d1\u751f\u53d8\u5316\uff0c\u5219\u6700\u540e\u7684slack\u4e5f\u4f1a\u53d8\u5316\u3002<\/div>\n
<\/div>\n
bmap\u5b89\u88c5\uff1a<\/b><\/div>\n
# tar -zxvf bmap-1.0.17.tar.gz<\/div>\n
# make<\/div>\n
<\/div>\n
make\u7684\u65f6\u5019\u4f1a\u62a5\u9519\uff1a<\/div>\n

sgml2latex bmap.sgml<\/p>\n

make: sgml2latex: Command not found<\/div>\n
\u4e0d\u7528\u7ba1\u5b83\uff0c\u662f\u56e0\u4e3a\u7cfb\u7edf\u6ca1\u6709\u5b89\u88c5sgml2latex\u5bfc\u81f4\u7684\uff0c\u4e0d\u5f71\u54cd\u4f7f\u7528\u3002<\/div>\n
<\/div>\n
bmap\u4f7f\u7528\uff1a<\/b><\/div>\n
# bmap –doc help<\/b>
\nbmap:1.0.17 (12\/25\/10) newt@scyld.com
\nUsage: bmap [OPTION]… []
\nuse block-list knowledge to perform special operations on files
\n–doc VALUE<\/span><\/b>
\nwhere VALUE is one of:
\nversion<\/b>\u00a0display version and exit
\nhelp<\/b>\u00a0display options and exit
\nman<\/b>\u00a0generate man page and exit
\nsgml<\/b>\u00a0generate SGML invocation info
\n–mode VALUE<\/span><\/b>
\nwhere VALUE is one of:
\nmap<\/b>\u00a0list sector numbers
\ncarve<\/b>\u00a0extract a copy from the raw device
\nslack<\/b>\u00a0display data in slack space
\nputslack<\/b>\u00a0place data into slack
\nwipeslack<\/b>\u00a0wipe slack\uff0c\u8fd9\u4e2a\u6700\u597d\u4e0d\u7528<\/span>
\ncheckslack<\/b>\u00a0test for slack (returns 0 if file has slack)
\nslackbytes<\/b>\u00a0print number of slack bytes available
\nwipe<\/b>\u00a0wipe the file from the raw device
\nfrag<\/b>\u00a0display fragmentation information for the file
\ncheckfrag<\/b>\u00a0test for fragmentation (returns 0 if file is fragmented)
\n–outfile write output to …
\n–label useless bogus option
\n–name useless bogus option
\n–verbose be verbose
\n–log-thresh logging threshold …
\n–target operate on …<\/div>\n
<\/div>\n
\u663e\u793a\u6587\u4ef6\u662f\u5426\u6709\u788e\u7247\uff1a<\/b><\/div>\n
# bmap –mode checkfrag XXXXX<\/div>\n
\u663e\u793a\u6587\u4ef6\u788e\u7247\u4f4d\u7f6e\uff1a<\/b><\/div>\n
\n
# bmap –mode frag XXXXX<\/div>\n
# .\/bmap –mode frag \/data0\/search\/hdfs-filesystem\/name\/current\/fsimage<\/div>\n

\/data0\/search\/hdfs-filesystem\/name\/current\/fsimage fragmented between 773070872 and 773131815
\n\/data0\/search\/hdfs-filesystem\/name\/current\/fsimage fragmented between 773131832 and 773136039<\/p><\/div>\n

<\/div>\n
\u663e\u793a\u6587\u4ef6\u6240\u4f7f\u7528\u7684\u6247\u533a\uff1a<\/b><\/div>\n
# bmap –mode map XXXXX<\/div>\n
# .\/bmap –mode map COPYING
\n235357120
\n235357121
\n235357122
\n235357123<\/div>\n
<\/div>\n
\u4ece\u539f\u59cb\u8bbe\u5907\u4e0a\u8bfb\u53d6\u6587\u4ef6\u7684\u5185\u5bb9\uff1a<\/div>\n
# bmap –mode carve XXXXX<\/div>\n
<\/div>\n
\u663e\u793a\u6587\u4ef6\u7684slack\u4fe1\u606f\uff1a<\/b><\/div>\n
# bmap –mode slack XXXXX<\/div>\n
# .\/bmap –mode slack COPYING
\ngetting from block 29419644 \u00a0 \u54ea\u4e00\u4e2a\u5757\u6709slack
\nfile size was: 18008 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u6587\u4ef6\u5927\u5c0f
\nslack size: 2472 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 slack\u5927\u5c0f
\nblock size: 4096 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u7cfb\u7edf\u5757\u5927\u5c0f<\/div>\n
<\/div>\n
\u5f80\u6587\u4ef6\u7684slack\u91cc\u9762\u5199\u5165\u5185\u5bb9\uff1a<\/b><\/div>\n
# echo “aaabbbccc” | bmap –mode putslack XXXXX<\/div>\n
# echo “aaabbbccc” | .\/bmap –mode putslack COPYING
\ngetting from block 29419644
\nfile size was: 18008
\nslack size: 2472
\nblock size: 4096<\/div>\n
\u53ef\u4ee5\u7528slack\u68c0\u67e5\u5199\u5165\u7684\u5185\u5bb9\uff1a<\/div>\n
# .\/bmap –mode slack COPYING
\ngetting from block 29419644
\nfile size was: 18008
\nslack size: 2472
\nblock size: 4096
\naaabbbccc \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u91cc\u5c31\u662f\u5199\u5165\u7684\u5185\u5bb9\u3002<\/div>\n
<\/div>\n
\u68c0\u67e5\u6587\u4ef6\u662f\u5426\u542b\u6709slack\u5185\u5bb9\uff1a<\/b><\/div>\n
# bmap –mode checkslack XXXXX<\/div>\n
# .\/bmap –mode checkslack COPYING
\nCOPYING has slack<\/div>\n
<\/div>\n
\u68c0\u67e5\u6587\u4ef6\u6709\u591a\u5c11\u5b57\u8282\u53ef\u4ee5\u7528\u4e8eslack\uff1a<\/b><\/div>\n
# bmap –mode slackbytes XXXXX<\/div>\n
# .\/bmap –mode slackbytes COPYING
\n2472<\/div>\n
<\/div>\n
\u6e05\u9664slack\u5185\u5bb9\uff1a<\/b><\/div>\n
# bmap –mode wipe XXXXX<\/div>\n
\u53ef\u4ee5\u7528checkslack\u6216slack\u68c0\u67e5\u5185\u5bb9\u662f\u5426\u5df2\u7ecf\u6e05\u9664\u3002<\/div>\n
# .\/bmap –mode checkslack COPYING
\nCOPYING does not have slack<\/div>\n","protected":false},"excerpt":{"rendered":"

\u4ec0\u4e48\u662flinux\u6587\u4ef6\u7684slack\uff1a linux\u6587\u4ef6\u7cfb\u7edf\u662f\u4ee5\u5757\uff08CentOS\u9ed8\u8ba4\u4e3a4096\u5b57\u8282\uff09\u4e3a\u5355\u4f4d\u6765\u5206\u914d\u786c\u76d8 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[9,124,125,126],"class_list":["post-214","post","type-post","status-publish","format-standard","hentry","category-linuxandroid","tag-linux","tag-slack","tag-125","tag-126"],"views":1758,"_links":{"self":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=214"}],"version-history":[{"count":1,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/214\/revisions"}],"predecessor-version":[{"id":215,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/214\/revisions\/215"}],"wp:attachment":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=214"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}