LINUX C++ REGEXP ÕýÔò±í´ïʽ
ÔÚPOSIXÖУ¬±ãÓÐ×ÅÖ§³ÖÕýÔò±í´ïʽµÄϵͳº¯Êý¡£GNU/LinuxÓÐÁ½Ì׿â¿ÉÓÃÓÚÕýÔò±í´ïʽ±à³Ì£ºPOSIX¿âºÍPCRE¿â¡£Ç°Õß²»ÐèÒªµ¥¶À°²×°£¬Ò»°ãÐèÇó»¹ÊÇÄÜÂú×ãµÄ£¬ËÙ¶ÈÉÔÂýЩ¡£ºóÕßÊǾøºÊ¢ÃûµÄPerlÕýÔò±í´ïʽ¿â£¬¹¦ÄÜÇ¿´ó£¬Æ¥ÅäËٶȿ죬²»¹ý¿ÉÄÜÐèÒªµ¥¶À°²×°¡£
int regcomp (regex_t *compiled, const char *pattern, int cflags)
²ÎÊýcompiledÖ»ÓÐÒ»¸ö³ÉÔ±ÊÇÎÒÃÇÐèÒª¹Ø×¢µÄ£¬ÄǾÍÊÇre_nsub£¬´ú±í±àÒëºóµÄ×Ó±í´ïʽÊýÄ¿£¬ÓÉÓÚÎÒÃÇ»¹ÐèÒª±£´æÕû¸öÆ¥Åäµ½µÄģʽ£¬ËùÒÔ×îÖÕÆ¥ÅäµÄÌõÄ¿ÊýÊÇre_nsub¼Ó1¡£cflagsÓÃÀ´ÐÞÊÎÆ¥Åäģʽ£¬¿ÉÈ¡ÖµÈçÏ£º
REG_EXTENDED ÆôÓÃPOSIXÕýÔò¿âÀ©Õ¹£¬¹ØÓÚ¸ÃÀ©Õ¹µÄÏêϸÐÅÏ¢¿É²Î¿¼POSIX¹æ·¶
REG_ICASE ºöÂÔ´óСд
REG_NOSUB ²»Òª´æ´¢×Ó±í´ïʽ
REG_NEWLINE °Ñ»»Ðзû×÷Ϊ¶àÐеķָô·û£¬ÕâÑù'$'¿ÉÆ¥ÅäÿһÐеÄÐÐ⣬'^'Æ¥ÅäÿһÐеÄÐÐÊ×£¬'.'²»Æ¥Åä»»Ðзû£¬[^...]²»Æ¥ÅäÐÂÐС£
²ÎÊýregexÊÇÒ»¸ö×Ö·û´®£¬Ëü´ú±í½«Òª±»±àÒëµÄÕýÔò±í´ïʽ;²ÎÊýpregÖ¸ÏòÒ»¸öÉùÃ÷Ϊregex_tµÄÊý¾Ý½á¹¹£¬ÓÃÀ´±£´æ±àÒë½á¹û;²ÎÊýcflags¾ö¶¨ÁËÕýÔò±í´ïʽ¸ÃÈçºÎ±»´¦ÀíµÄϸ½Ú¡£
¡¡¡¡Èç¹ûº¯Êýregcomp()Ö´Ðгɹ¦£¬²¢ÇÒ±àÒë½á¹û±»ÕýÈ·Ìî³äµ½pregÖк󣬺¯Êý½«·µ»Ø0£¬ÈκÎÆäËüµÄ·µ»Ø½á¹û¶¼´ú±íÓÐijÖÖ´íÎó²úÉú¡£
¡¡¡¡Æ¥ÅäÕýÔò±í´ïʽ
¡¡¡¡Ò»µ©ÓÃregcomp()º¯Êý³É¹¦µØ±àÒëÁËÕýÔò±í´ïʽ£¬½ÓÏÂÀ´¾Í¿ÉÒÔµ÷ÓÃregexec()º¯ÊýÍê³ÉģʽƥÅ䣺
±àÒëÍêģʽºóÎÒÃÇ´ÓÄÚ´æÖзÖÅä×Ó±í´ïʽ´æ´¢¿Õ¼ä£¬È»ºóµ÷ÓÃregexec¶Ô´®½øÐÐÆ¥Å䣬¸Ãº¯ÊýÔÐÍÈçÏ£º
int regexec (regex_t *compiled, char *string, size_t nmatch, regmatch_t matchptr [], int eflags)
nmatchÖ¸Ã÷matchptrÊý×éµÄÊýÄ¿£¬¸ÃÊýÄ¿ÊÇcompiled->re_nsub+1£¬Ò²¿ÉÒÔÈÃnmatchΪ0,matchptrΪNULL£¬±íʾ²»Òª±£´æ×Ó±í´ïʽ¡£eflagsͨ³£Îª0¡£
²ÎÊýpregÖ¸Ïò±àÒëºóµÄÕýÔò±í´ïʽ£¬²ÎÊýstringÊǽ«Òª½øÐÐÆ¥ÅäµÄ×Ö·û´®£¬¶ø²ÎÊýnmatchºÍpmatchÔòÓÃÓÚ°ÑÆ¥Åä½á¹û·µ»Ø¸øµ÷ÓóÌÐò£¬×îºóÒ»¸ö²ÎÊýeflags¾ö¶¨ÁËÆ¥ÅäµÄϸ½Ú¡£
¡¡¡¡ÔÚµ÷Óú¯Êýregexec()½øÐÐģʽƥÅäµÄ¹ý³ÌÖУ¬¿ÉÄÜÔÚ×Ö·û´®stringÖлáÓжദÓë¸ø¶¨µÄÕýÔò±í´ïʽÏàÆ¥Å䣬²ÎÊýpmatch¾ÍÊÇÓÃÀ´±£´æÕâЩƥÅäλÖõģ¬¶ø²ÎÊýnmatchÔò¸æËߺ¯Êýregexec()×î¶à¿ÉÒ԰ѶàÉÙ¸öÆ¥Åä½á¹ûÌî³äµ½pmatchÊý×éÖС£µ±regexec()º¯Êý³É¹¦·µ»Øʱ£¬´Óstring+pmatch[0].rm_soµ½string+pmatch[0].rm_eoÊǵÚÒ»¸öÆ¥ÅäµÄ×Ö·û´®£¬¶ø´Óstring+pmatch[1].rm_soµ½string+pmatch[1].rm_eo£¬ÔòÊǵÚ
Ïà¹ØÎĵµ£º
×ÜÀÀ
ÓÃiptables -ADC À´Ö¸¶¨Á´µÄ¹æ
Ôò
£¬-AÌí¼Ó -Dɾ³ý -C ÐÞ¸Ä
iptables - [RI] chain rule num rule-specification[option]
ÓÃiptables - RI ͨ¹ý¹æÔòµÄ˳ÐòÖ¸¶¨
iptables -D chain rule num[option]
ɾ³ýÖ¸¶¨¹æÔò
iptables -[LFZ] [chain][option]
ÓÃiptables -LFZ Á´Ãû [Ñ¡Ïî]
iptables -[NX] chain
ÓÃ -NX ......
linux ¿ª»úÆô¶¯½Å±¾Ë³Ðò¡£
µÚÒ»²½£ºÆô¶¯ÄÚºË
µÚ¶þ²½£ºÖ´ÐÐinit £¨ÅäÖÃÎļþ/etc/inittab£©
µÚÈý²½£ºÆô¶¯ÏàÓ¦µÄ½Å±¾£¬²¢ÇÒ´ò¿ªÖÕ¶Ë/etc/init.d
rc.sysinit rc.d(ÀïÃæµÄ½Å±¾£© rc.local
µÚËIJ½£ºÆô¶¯loginµÇ¼½çÃæ login
µÚÎå²½:ÔÚÓû§µÇ¼µÄʱºòÖ´ÐÐsh½Å±¾µÄ˳Ðò£ºÃ¿´ÎµÇ¼µÄʱºò¶ ......
C/C++ Reference
http://www.cppreference.com/
C++ Library Reference
http://www.cplusplus.com/ref/
Standard C++ Library Class Reference at Rogue Wave
http://www.roguewave.com/support/docs/hppdocs/stdref/
Dink ......
1£© º¯ÊýÉùÃ÷
l CÈç¹û²»Ð´·µ»ØÖµ£¬Ä¬ÈÏÊÇint£¬¶øC++Öв»Äܲ»Ð´·µ»ØÖµ(¿ÉÓÃvoid±íʾÎÞ·µ»ØÖµ)¡£
ÈçFunc1();
l int Func1()ÔÚCÖбíʾ¿É´øÈÎÒâ²ÎÊýµÄº¯Êý£¬ÕâÊÇCµÄ©¶´£¬Ê¹µÃËü±Ü¿ªÁ˲ÎÊýÀàÐͼì²é£»¶øC++Öбíʾ²»´ ......