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How dd does blocking

Wandering Thoughts | Aug. 31, 2006, 1:18 a.m. | Original

For a conceptually simple program, dd has a number of dark corners.One of them (at least for me) is how it deals with input and outputblock sizes, and how the various blocking arguments change thingsaround.

ibs= sets the input block size, the size of the read() s that dd will make. Since you can get partial reads in varioussituations, this is really the maximum size that dd will everread at once.
obs= sets the output block size and makes dd '

blog day 2006

JackysBlog | Aug. 30, 2006, 10:02 p.m. | Original

3108 了，先介紹五個 blog:

王進角度 – 王進兄的影評角度獨到，除了影評，也寫專題。最近香港影庫將使用 WordPress 為骨架，自此就可以在 RSS Reader 裏看王兄的影評了。
占占字起 – 阿占是個多產的 blogger，文章更新得快，對於社會時事、網絡

盲人影院 -- 周雲蓬

chihung | Aug. 30, 2006, 3:23 a.m. | Original

盲人影院 -- 周雲蓬

這是一個盲人影院，
那邊也是個盲人影院。
銀幕上長滿了潮濕的耳朵，
聽黑蟻王講一個故事。
有一個孩子，九歲時失明，
常年生活在盲人影院，
從早到晚聽著那些電影，
聽不懂地方靠想象來補充。
他想象自己

不是詩

chihung | Aug. 30, 2006, 3:10 a.m. | Original

「窮」 = 令我想起周雲蓬其中一首詩「不是詩」
濃濃的尊嚴味道，再看看他過往的經歷。
十分欣賞這個人
我手上還有很多上次來演出時留下的詩集
有興趣看看可以找我

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A problem with debugging threaded Python programs

Wandering Thoughts | Aug. 30, 2006, 1:18 a.m. | Original

I have a heavily threaded Python program that dies every now and thenwith a mysterious exception (that as far as I can see just shouldn'thappen, which means that I don't completely understand my code).

My off and on attempts to debug this have pointed out a frustratingproblem in Python's (lack of) support for debugging threaded Pythonprograms: there's no such thing as a global exception, something thatwill freeze, backtrace, and terminate all threads when an erroroccurs.

How to lose readers of your syndication feed

Wandering Thoughts | Aug. 30, 2006, 1:18 a.m. | Original

It's pretty simple:

change your syndication feed URL
but don't remove or redirect the old feed, just stop updating it
and don't put up an entry about it (visible in the old feed).

Readers who are not especially attentive may not notice for weeks, onlyvaguely wondering if you've taken a vacation or something. Especially ifthey read a fair amount of feeds and are behind in their reading.

As far as I've gathered, most feed readers are perfectly willing to