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July 31, 2018 21:33
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Dumb pager program
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#include <sys/ioctl.h> | |
#include <unistd.h> | |
#include <termios.h> | |
#include <iostream> | |
#include <fstream> | |
#include <string> | |
#include <cstdio> | |
int main(int argc, char* argv[]) | |
{ | |
int ret = 0; | |
struct termios t, save; | |
tcgetattr(STDIN_FILENO, &t); | |
save = t; | |
t.c_lflag &= ~(ICANON | ECHO); | |
tcsetattr(STDIN_FILENO, TCSAFLUSH, &t); | |
struct winsize w; | |
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w); | |
const int pagesize = w.ws_row; | |
std::ifstream ifs(argv[1]); | |
if (!ifs) { | |
std::perror("Error"); | |
ret = errno; | |
goto exit; | |
} | |
while (!ifs.eof()) { | |
std::string line; | |
for (int i = 1; i < pagesize and std::getline(ifs, line); i++) { | |
std::cout << line << std::endl; | |
} | |
std::cin.get(); | |
} | |
exit: | |
tcsetattr(STDIN_FILENO, TCSAFLUSH, &save); | |
return ret; | |
} |
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