锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#x39;&#x37;&#x9999;&#x8549;&#x4E45;&#x4E45;&#x591C;&#x8272;&#x7CBE;&#x54C1;&#x56FD;&#x4EA7;&#x0D;&#x2C;&#x4E45;&#x4E45;&#x4E2D;&#x6587;&#x5B57;&#x5E55;&#x65E0;&#x7801;&#x4E13;&#x533A;&#x2C;&#x4E9A;&#x6D32;&#x4EBA;&#x6210;&#x7F51;&#x4E9A;&#x6D32;&#x6B27;&#x6D32;&#x65E0;&#x7801;&#x4E45;&#x4E45;</title><link>http://www.shnenglu.com/mysileng/category/20298.html</link><description /><language>zh-cn</language><lastBuildDate>Tue, 15 Jan 2013 12:48:07 GMT</lastBuildDate><pubDate>Tue, 15 Jan 2013 12:48:07 GMT</pubDate><ttl>60</ttl><item><title>select鍑芥暟涓巗tdio娣風(fēng)敤鐨勪笉鑹悗鏋?(鍘?</title><link>http://www.shnenglu.com/mysileng/archive/2013/01/15/197284.html</link><dc:creator>閼緳</dc:creator><author>閼緳</author><pubDate>Tue, 15 Jan 2013 05:09:00 GMT</pubDate><guid>http://www.shnenglu.com/mysileng/archive/2013/01/15/197284.html</guid><wfw:comment>http://www.shnenglu.com/mysileng/comments/197284.html</wfw:comment><comments>http://www.shnenglu.com/mysileng/archive/2013/01/15/197284.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/mysileng/comments/commentRss/197284.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/mysileng/services/trackbacks/197284.html</trackback:ping><description><![CDATA[&nbsp; &nbsp; &nbsp;杞澆璇鋒敞鏄?鍑?guó)檱Q歨ttp://www.shnenglu.com/mysileng/archive/2013/01/15/197284.html<br /><br />&nbsp; &nbsp; &nbsp;浠婂ぉ鍦ㄧ湅UNP6.5鑺傦紝瀛︿範(fàn)鍒頒簡(jiǎn)select涓巗tdio娣風(fēng)敤鐨勫悗鏋溿�傜壒姝よ繘紼嬪疄楠屼竴鐣�傚啀瀹為獙涔嬪墠闇�鏄庣‘涓�涓嬪嚑鐐癸細(xì)<br />1.stdio嫻佺殑i/o鍑芥暟 涓?緋葷粺i/o鍑芥暟涓嶅悓銆俿tdio嫻佸嚱鏁板湪鐢ㄦ埛絀洪棿鍜屽唴鏍擱兘鏈夌紦鍐詫紝緋葷粺i/o鍑芥暟鍙湪鍐呮牳鏈夌紦鍐詫紝鐢ㄦ埛絀洪棿娌℃湁銆?br /><br />2.stdio嫻佺殑i/o鍑芥暟緙撳啿鏈哄埗錛氬湪闈㈠鏂囦歡鏃跺�欑敤鐨勬槸鍏ㄧ紦鍐詫紝闈㈠璁懼鐨勬椂鍊欑敤鐨勮緙撳啿銆?絳変笅璇曢獙鐢ㄧ殑鏄敭鐩樺拰灞忓箷)錛屾墍浠ュ疄楠岀敤鐨剆tdio鍑芥暟閲囩敤琛岃緙撳啿銆?br /><br />3.select鍑芥暟瀵逛簬鏌愪竴涓弿榪扮鏄惁鍑嗗濂藉彲璇誨彲鍐欙紝鏄鍐呮牳緙撳啿鍖轟腑鐨勬暟鎹槸鍚﹁揪鍒版煇涓�涓渶浣庢爣鍑嗭紝鑰屼笉鏄敤鎴風(fēng)紦鍐插尯銆備篃灝辨槸璇磗elect鍑芥暟涓嶇煡閬撶敤鎴風(fēng)紦鍐插尯鐨勫瓨鍦ㄣ�?br /><br />棣栧厛鍐欎簡(jiǎn)涓�涓郴緇焛/o鍑芥暟 綆�鍗曠殑select鍑芥暟紼嬪簭錛?br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130115122357.jpg" width="527" height="387" alt="" /><br />&nbsp; &nbsp; &nbsp;紼嬪簭緇檚elect鍑芥暟鍙緗殑閿洏鐨勬弿榪扮銆備篃灝辨槸璇村鏋滈敭鐩樼殑鎻忚堪絎﹀噯澶囧ソ浜?jiǎn)灏变笉鍐嶉樥d銆備絾鏄繖閲屾湁涓�涓棶棰橈紝瑙ｉ櫎闃誨鍚庯紝鎴戜滑鏈�澶氬彧浠庡唴鏍哥紦鍐插尯璇?涓瓧鑺傦紝榪欎釜鏃跺�欏氨浼?xì)鏈変袱涓儏鍐靛Q?br />錛?錛夊唴鏍哥┖闂存湰鏉ュ瓨鍌ㄧ殑鏁版嵁灝卞皬浜庣瓑浜?涓瓧鑺傦紝鍏ㄨ璇昏蛋銆傞偅涓嬫鍐嶆璋冪敤select鍑芥暟錛屽簲璇ヨ偗瀹氫細(xì)闃誨鐨勶紝鍥犱負(fù)閿洏杈撳叆鐨勫唴鏍哥紦鍐插尯宸茬粡娌℃湁鏁版嵁浜?jiǎn)銆?br />鎯呭喌濡備笅(鍐呮牳絀洪棿鍙湁3涓瓧鑺傦細(xì)1 2 \n):<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130115122952.jpg" width="331" height="100" alt="" /><br /><br />錛?錛夊鏋滃唴鏍哥┖闂寸殑鏁版嵁澶氫綑3涓瓧鑺傦紝浣嗘槸鍥犱負(fù)鏈�澶氬彧鑳借3涓瓧鑺傦紝灝卞繀灝嗗鑷村唴鏍鎬腑鏈夋暟鎹涓嶅畬銆傞偅涔堜笅嬈″啀閬囧埌select鍑芥暟鐨勬椂鍊欐槸鍚︿細(xì)闃誨鍛紵<br />鎯呭喌瑙佷笅:<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130115123255.jpg" width="296" height="72" alt="" /><br />&nbsp; &nbsp; &nbsp;褰撴垜浠緭鍏?涓瓧絎︽椂鍊?1 2 3 4 \n)錛岀涓�嬈ead鎺?涓瓧絎︼紝鍐呮牳絀洪棿榪樺墿涓?涓瓧絎︼紝鐒跺悗鍐嶆紕板埌select鍑芥暟錛岄粯璁ゆ儏鍐典笅濡傛灉閿洏鍐呮牳絀洪棿瀛楃鏁板ぇ浜?錛宻elect鏄笉浼?xì)闃诲閿洏鎻彉q扮鐨勩�傜粨鏋滀篃鍗拌瘉浜?jiǎn)锛屽張read浜?涓瓧鑺傦紝騫舵病鏈夊牭濉炪�?br />&nbsp; &nbsp; &nbsp; 緇間笂鎵�榪皊elect鏄彲浠ョ湅瑙佸唴鏍哥┖闂寸殑緙撳啿鍖虹殑銆傞偅鍒板簳鑳戒笉鑳界湅瑙佺敤鎴風(fēng)┖闂寸紦鍐插尯鍛紵鎴戜滑鎹㈡垚stdio嫻佺殑i/o鍑芥暟緇х畫瀹為獙銆?br /><br />--------------------------------------------------------------------<br />stdio嫻佺殑i/o鍑芥暟浣跨敤select鍑芥暟鐨勭▼搴忓涓嬶細(xì)<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130115123858.jpg" width="542" height="476" alt="" /><br /><br />紼嬪簭鐢╯tdio嫻佺殑getc鍑芥暟浠庨敭鐩樿鏁版嵁錛岃繍琛岀粨鏋滃涓嬶細(xì)<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130115124153.jpg" width="336" height="68" alt="" /><br />&nbsp; &nbsp;鎴戜滑杈撳叆5涓瓧絎?1 2 3 4 \n),緇撴灉鍙緭鍑轟簡(jiǎn)1涓瓧絎︼紝鐒跺悗灝遍樆濉炰簡(jiǎn)銆傛垜浠垎鏋愪竴涓?棣栧厛杈撳叆5涓瓧絎︼紝榪?涓瓧絎﹁鏀懼叆鐢ㄦ埛緙撳啿鍖猴紝鍥犱負(fù)鏈�鍚庝竴涓槸鎹㈣絎﹀茍涓攕tdio闈㈠璁懼浣跨敤琛岀紦鍐叉満鍒訛紝鎵�浠ヨ繖5涓瓧絎﹂┈涓婃帴鐫�琚粠鐢ㄦ埛緙撳啿鍖哄埛鍏ュ唴鏍哥紦鍐插尯銆傜劧鍚庤皟鐢╯elect鍑芥暟錛宻elect鍑芥暟鍙戠幇鍐呮牳絀洪棿涓湁鏁版嵁錛屼簬鏄笉闃誨榪斿洖銆傛帴鐫�getc鍑芥暟浠庣敤鎴風(fēng)┖闂磋緭鍑虹紦鍐插尯鍙栦竴涓瓧絎︼紝鍥犱負(fù)鐢ㄦ埛絀洪棿杈撳嚭緙撳啿鍖烘病鏈夋暟鎹紝浜庢槸鎶婂唴鏍哥┖闂寸殑鏁版嵁璋冨叆涓�琛岀粰鐢ㄦ埛絀洪棿杈撳嚭緙撳啿鍖猴紝鐒跺悗getc榪斿洖銆傛帴鐫�鍙堢涓妔elect鍑芥暟錛屽洜涓哄唴鏍哥紦鍐茬┖闂寸殑鏁版嵁宸茬粡琚斁鍏ョ敤鎴風(fēng)┖闂磋緭鍑虹紦鍐插尯浜?jiǎn)锛屾墍浠ュ唴鏍哥紦鍐叉病鏈夋暟鎹紝閭ｄ箞select璁や負(fù)閿洏娌℃湁鍑嗗濂斤紝鎵�浠ラ樆濉炪�傝櫧鐒墮樆濉炰簡(jiǎn)錛屼絾闇�瑕佹敞鎰忕殑鏃跺�欒繖涓椂鍊欙紝鐢ㄦ埛絀洪棿鏄湁4涓瓧絎︽暟鎹殑錛岃select鍑芥暟鏃犺浜?jiǎn)銆?br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130115125757.jpg" width="518" height="297" alt="" /><br />&nbsp; 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&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;杞澆璇鋒敞鏄?鍑?guó)檱Q歨ttp://www.shnenglu.com/mysileng/archive/2013/01/11/197202.html<br /><br />&nbsp; &nbsp; &nbsp;璁ㄨ涓や釜鐢眘igchld淇″彿寮曡搗鐨勮妗堥棶棰橈紝璁ㄨ鐨勭幆澧冩槸鏈嶅姟绔殑騫跺彂紼嬪簭銆傛垜浠厛鎶婃渶鍘熷鐨勬湇鍔″櫒绔茍鍙戠▼搴忔ā鍨嬭創(chuàng)鍑烘潵錛?br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130111183647.jpg" width="658" height="849" alt="" /><br />&nbsp; &nbsp; &nbsp;浠ヤ笂鏄湇鍔″櫒绔▼搴忥紝鎴戜滑鍏堜笉鐪嬭娉ㄨ鎺夌殑閮ㄥ垎錛岀▼搴忓浜庢瘡涓�涓猘ccept鐨凾CP榪炴帴浼?xì)漶旂敓涓�涓瓙榪涚▼錛屼氦緇欏瓙榪涚▼鍘誨鐞嗐�傝�屽瓙榪涚▼鍏跺疄騫朵笉鍋氫粈涔堬紝鐩存帴鐫＄湢3縐掑氨緇撴潫銆傚彲浠ユ兂璞¤繖鏍峰綋瀛愯繘紼媏xit浠ュ悗錛屼細(xì)緇欑埗榪涚▼鍙憇igchld淇″彿錛岄�氱煡鐖惰繘紼嬭嚜宸辨寕浜?jiǎn)銆備絾鏄湪鎴戜滑鐨勭埗榪涚▼涓紝鎴戜滑瀵逛簬sigchld淇″彿閲囩敤榛樿澶勭疆(蹇界暐)銆傜粨鏋滃彲鎯寵�岀煡灝辨槸鏉ヤ竴涓繛鎺ワ紝灝變駭鐢熶竴涓兊姝昏繘紼嬨�傛垜浠繍琛岀▼搴?嬈★紝鐪嬬湅鏄惁浼?xì)寰楀?涓兊姝昏繘紼嬨�?br />鏈嶅姟鍣ㄧ榪愯紼嬪簭錛岃鏌愬鎴風(fēng)榪炴帴3嬈★細(xì)<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130111184329.jpg" width="307" height="129" alt="" /><br />瀹㈡埛绔繍琛岀▼搴忔墽琛?嬈★紝騫舵煡鐪嬭繘紼嬫儏鍐?<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130111184500.jpg" width="583" height="218" alt="" /><br />&nbsp; 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&nbsp;&nbsp;鍒氬啓浜?jiǎn)绋嬪簭鍙戠幇鐐归棶棰樸�傚亣璁句竴涓▼搴忔湁澶氫釜綰跨▼錛屾湁涓�涓叏灞�浜掓枼閿丮....鍦ㄦ煇綰跨▼A鑾峰緱閿佷互鍚庯紝榪欎釜鏃跺�欐潵浜?jiǎn)涓�涓俊鍙?鍋囪榪欎釜淇″彿娉ㄥ唽浜?jiǎn)鑷忿q殑澶勭悊紼嬪簭)錛岄偅涔堥渶瑕佽繘鍏ヤ俊鍙峰鐞嗙▼搴忥紝榪涘叆浠ュ悗淇″彿澶勭悊澶勭悊紼嬪簭涔熻鑾峰緱榪欎釜閿併�傞棶棰樻潵浜?jiǎn)锛熶細(xì)姝婚攣涔堝Q?br />&nbsp; &nbsp; 鎴戜滑鐭ラ亾鍚屼竴綰跨▼濡傛灉閲嶅鐢寵鍚屼竴涓簰鏂ラ攣閭ｄ箞蹇呯劧浼?xì)姝婚攣锛煒q欓噷闂杞崲鍒頒俊鍙峰鐞嗗嚱鏁拌窡涔嬪墠鐨勭嚎紼婣浼?xì)鏄悓涓�涓嚎紼嬩笂涓嬫枃涔堬紙鍗蟲槸鍚屼竴涓嚎紼嬩箞錛夛紵鎴戜滑璇曢獙涓�涓嬨�傚疄楠屼箣鍓嶉渶瑕佹槑紜嚑鐐癸細(xì)<br />&nbsp; &nbsp; 1.鏍規(guī)嵁APUE 12.8錛岃繘紼嬬殑澶勭悊鍑芥暟涓庡鐞嗘柟寮忔槸榪涚▼涓墍鏈夌嚎紼嬪叡浜殑銆?br />&nbsp; &nbsp; 2.鏍規(guī)嵁APUE 12.8錛屽鏋滆繘紼嬫帴鏀跺埌淇″彿錛岃淇″彿鍙細(xì)琚�掗�佸埌鏌愪竴涓崟鐙嚎紼嬨�備竴鑸儏鍐典笅鐢遍偅涓嚎紼嬪紩璧蜂俊鍙峰垯閫掗�佸埌閭ｄ釜綰跨▼銆傚鏋滄病鏈夌嚎紼嬪紩鍙戜俊鍙鳳紝淇″彿琚彂閫佸埌浠繪剰綰跨▼銆?br /><br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/1.jpg" width="510" height="539" alt="" /><br /><br />&nbsp; &nbsp; &nbsp;涓婇潰紼嬪簭棣栧厛鍏變韓浜?jiǎn)涓�涓叡鍚岀殑SIGUSR1淇″彿澶勭悊鍑芥暟錛屼富鎺х嚎紼婣鐒跺悗浜х敓涓�涓嚎紼婤錛岀嚎紼婤棣栧厛鑾峰緱鍏ㄥ眬浜掓枼閿侊紝鐒跺悗榪愯涓�涓暱5縐掔殑紼嬪簭錛岀劧鍚庨噴鏀鵑攣銆傚湪B榪愯浜?jiǎn)澶ф?縐掔殑鏃跺�欙紝綰跨▼A緇欐湰榪涚▼(娉ㄦ剰鏄繘紼嬶紝鑰屼笉鏄煇綰跨▼)鍙戦�佷竴涓猄IGUSR1淇″彿銆傛鏃訛紝浼?xì)姝婚攣涔堝Q熺紪璇戣繍琛岀湅緇撴灉.<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/threa1d2.jpg" width="538" height="788" alt="" /><br />&nbsp; &nbsp; 榪炵畫榪愯浜?嬈★紝閮芥病鏈夋閿併�傛垜浠垎鏋愪竴涓嬶紝褰撹繘紼嬫帴鏀朵俊鍙鋒椂錛岃繘紼嬫妸淇″彿騫舵病鏈夐�掗�佺粰綰跨▼B(鍥犱負(fù)娌℃湁浜х敓姝婚攣)錛屼篃灝辨槸璇存槸涓嶆槸榪欎釜閫掗�佽繃紼嬭浼樺寲浜?jiǎn)锛煒q樻槸鎴戜滑鐪熺殑榪愭皵濂斤紵闇�瑕佽繘涓�姝ユ帰鏌ャ�傛帴涓嬫潵鎴戜滑鎸囧畾鎶婁俊鍙烽�掗�佺粰綰跨▼B錛岀湅浼?xì)涓嶄細(xì)姝婚攣銆?br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130105134437.jpg" width="506" height="535" alt="" /><br />&nbsp; &nbsp; 鎺ヤ笅鏉ョ紪璇戣繍琛岋細(xì)<br /><img src="http://www.shnenglu.com/images/cppblog_com/mysileng/QQ鎴浘20130105134639.jpg" width="508" height="121" alt="" /><br />&nbsp; &nbsp; 涓嶅嚭鎰忔枡錛屾灉鐒舵閿佷簡(jiǎn)銆?br />&nbsp; &nbsp; 涔熷氨鏄錛屽叧浜庣嚎紼嬩笌淇″彿澶勭悊鍑芥暟鑾峰緱鍚屼竴鎶婁簰鏂ラ攣鐨勯棶棰橈紝鍏抽敭鏄湅淇″彿琚�掗�佺粰浜?jiǎn)閭ｄ釜绾拷E嬶紝濡傛灉淇″彿鏄閫掗�佺粰浜?jiǎn)鑾峰緱閿佺殑閭ｄ釜绾拷E嬶紝灝變細(xì)姝婚攣錛屽鏋滀笉鏄箣鍓嶈幏寰楅攣鐨勭嚎紼嬶紝紼嬪簭灝辯戶緇繍琛屻�?img src ="http://www.shnenglu.com/mysileng/aggbug/196971.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/mysileng/" target="_blank">閼緳</a> 2013-01-05 13:46 <a href="http://www.shnenglu.com/mysileng/archive/2013/01/05/196971.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                                                                              <footer>
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