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#include <stdio.h>
#include <regex.h>
int main(int argc, char** argv)
{
regex_t reg;
regmatch_t pm[10];
char *pattern;
char buf[50];
const size_t nmatch = 10;

pattern = argv[1];
int result = regcomp(®, pattern, REG_EXTENDED);
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Linux ²âÊÔsendmailÓʼþ·¢ËÍ

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echo "Subject: test" | /usr/lib/sendmail -v xinhaozheng@gmail.com
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WARNING: local host name (server) is not qualified; see cf/README: WHO AM I?
xinhaozheng ......

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Connection reset by peer > Linux ϵĴíÎó error.h

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