📄 00000009.htm

📁 一份很好的linux入门资料
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<HTML><HEAD>  <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;<A HREF="mailto:r2506070@csie.ntu.edu.tw">r2506070@csie.ntu.edu.tw</A>&nbsp;(Anmin&nbsp;Deng),&nbsp;看板:&nbsp;linux&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;STACK&nbsp;SIZE&nbsp;in&nbsp;Linux&nbsp;<BR>发信站:&nbsp;Nat'l&nbsp;Taiwan&nbsp;Univ..CSIE&nbsp;(Sun&nbsp;Jun&nbsp;16&nbsp;02:07:01&nbsp;1996)&nbsp;<BR>转信站:&nbsp;maple!news.ee.nthu!news.csie.nctu!netnews.ntu!r2506070&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>请看下列程式..&nbsp;<BR>&nbsp;<BR>main()&nbsp;<BR>{&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;char&nbsp;c[10000000];&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;c[0]=0;&nbsp;<BR>}&nbsp;<BR>&nbsp;<BR>执行结果..&nbsp;&nbsp;Segmentation&nbsp;Fault!&nbsp;<BR>&nbsp;<BR>经过一番明查暗访,&nbsp;得知&nbsp;linux&nbsp;在&nbsp;1.3.xx&nbsp;版後,&nbsp;将内定的&nbsp;<BR>stack&nbsp;size&nbsp;改成有&nbsp;8M&nbsp;的限制,&nbsp;所以&nbsp;local&nbsp;variable&nbsp;一大,&nbsp;<BR>或&nbsp;call&nbsp;stack&nbsp;太深时,&nbsp;stack&nbsp;即&nbsp;sigsegv.&nbsp;我们可以在&nbsp;<BR>tcsh&nbsp;下用&nbsp;&quot;limit&quot;,&nbsp;bash&nbsp;下用&nbsp;&quot;ulimit&nbsp;-a&quot;&nbsp;指令来查看.&nbsp;<BR>&nbsp;<BR>身为&nbsp;user,&nbsp;我们无能去加大&nbsp;stack&nbsp;size&nbsp;的限制,&nbsp;但身为&nbsp;root,&nbsp;<BR>可以在&nbsp;tcsh&nbsp;下用指令&nbsp;&quot;unlimit&nbsp;stacksize&quot;&nbsp;或&nbsp;&quot;limit&nbsp;stacksize&nbsp;xxxx&quot;,&nbsp;<BR>在&nbsp;bash&nbsp;用指令&nbsp;&quot;ulimit&nbsp;-s&nbsp;xxxx&quot;&nbsp;或&nbsp;&quot;ulimit&nbsp;-s&nbsp;unlimited&quot;&nbsp;<BR>来加大stack.&nbsp;如果&nbsp;root&nbsp;认为&nbsp;stack&nbsp;太大不会对系统造成伤害,&nbsp;<BR>那麽可以在&nbsp;/etc/initscript&nbsp;档加上一排&nbsp;bash&nbsp;的指令来加大&nbsp;stack..&nbsp;<BR>&nbsp;<BR>ulimit&nbsp;-s&nbsp;xxxx&nbsp;或&nbsp;ulimit&nbsp;-s&nbsp;unlimited&nbsp;<BR>&nbsp;<BR>如此每个&nbsp;user&nbsp;都可以执行上面那个程式了.&nbsp;<BR>&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>
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