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1#include <cstdio>2#include <string>3#include <unistd.h>4 5std::string getline() {6  std::string result;7  while (true) {8    int r;9    char c;10    do11      r = read(fileno(stdin), &c, 1);12    while (r == -1 && errno == EINTR);13    if (r <= 0 || c == '\n')14      return result;15    result += c;16  }17}18 19void input_copy_loop() {20  std::string str;21  while (str = getline(), !str.empty())22    printf("read: %s\n", str.c_str());23}24 25int main() {26  input_copy_loop();27  return 0;28}29