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#include <string.h>
#include <netdb.h>
extern int getservbyport_r(int port,const char* proto,
struct servent *res, char *buf, size_t buflen,
struct servent **res_sig) {
while (!getservent_r(res,buf,buflen,res_sig))
if (port==res->s_port && !strcmp(res->s_proto,proto)) goto ok;
*res_sig=0;
ok:
endservent();
return *res_sig?0:-1;
}
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