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comparison termhelper.c @ 794:792be135d3af

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Spawn a terminal for the debugger when needed if we are not already attached to one
author Michael Pavone <pavone@retrodev.com>
date Sun, 26 Jul 2015 01:11:04 -0700
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793:9aff36a172b2 794:792be135d3af
1 #include <sys/types.h>
2 #include <sys/stat.h>
3 #include <fcntl.h>
4 #include <unistd.h>
5 #include <stdlib.h>
6 #include "terminal.h"
7
8 char buf[4096];
9
10 void copy_data(int to, int from)
11 {
12 ssize_t bytes = read(from, buf, sizeof(buf));
13 while (bytes > 0)
14 {
15 ssize_t written = write(to, buf, bytes);
16 if (written == -1) {
17 exit(1);
18 }
19 bytes -= written;
20 }
21 }
22
23 int main(int argc, char **argv)
24 {
25 //these will block so order is important
26 int input_fd = open(INPUT_PATH, O_WRONLY);
27 int output_fd = open(OUTPUT_PATH, O_RDONLY);
28 fd_set read_fds;
29 FD_ZERO(&read_fds);
30 for (;;)
31 {
32 FD_SET(STDIN_FILENO, &read_fds);
33 FD_SET(output_fd, &read_fds);
34 select(output_fd+1, &read_fds, NULL, NULL, NULL);
35
36 if (FD_ISSET(STDIN_FILENO, &read_fds)) {
37 copy_data(input_fd, STDIN_FILENO);
38 }
39 if (FD_ISSET(output_fd, &read_fds)) {
40 copy_data(STDOUT_FILENO, output_fd);
41 }
42 }
43 return 0;
44 }