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#pragma once
#include <sys/socket.h>
char* copy_buf(const char *buf,int len);
char* copy_str(const char *str);
void str_toupper(char *str);
// Returns -1 on error, 0 on success
int sendall(int sock,const char *buf,ssize_t len);
int sendallf(int sock,const char *format,...) __attribute__((format (printf, 2, 3)));
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