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annotate termhelper.c @ 995:2bc27415565b

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Fix some stuff with interrupt timing. The change in adjust_int_cycle gets Overdrive working again (vint was not being preferred over hint in some cases). One of the changes seems to have broken Fatal Rewind again, but no other regressions that I can see.
author Michael Pavone <pavone@retrodev.com>
date Sat, 30 Apr 2016 08:37:55 -0700
parents 792be135d3af
children
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794
792be135d3af Spawn a terminal for the debugger when needed if we are not already attached to one
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1 #include <sys/types.h>
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2 #include <sys/stat.h>
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3 #include <fcntl.h>
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4 #include <unistd.h>
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5 #include <stdlib.h>
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6 #include "terminal.h"
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7
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8 char buf[4096];
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9
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10 void copy_data(int to, int from)
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11 {
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12 ssize_t bytes = read(from, buf, sizeof(buf));
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13 while (bytes > 0)
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14 {
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15 ssize_t written = write(to, buf, bytes);
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16 if (written == -1) {
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17 exit(1);
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18 }
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19 bytes -= written;
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20 }
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21 }
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22
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23 int main(int argc, char **argv)
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24 {
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25 //these will block so order is important
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26 int input_fd = open(INPUT_PATH, O_WRONLY);
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27 int output_fd = open(OUTPUT_PATH, O_RDONLY);
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28 fd_set read_fds;
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29 FD_ZERO(&read_fds);
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30 for (;;)
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31 {
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32 FD_SET(STDIN_FILENO, &read_fds);
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33 FD_SET(output_fd, &read_fds);
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34 select(output_fd+1, &read_fds, NULL, NULL, NULL);
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35
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36 if (FD_ISSET(STDIN_FILENO, &read_fds)) {
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37 copy_data(input_fd, STDIN_FILENO);
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38 }
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39 if (FD_ISSET(output_fd, &read_fds)) {
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40 copy_data(STDOUT_FILENO, output_fd);
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41 }
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42 }
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43 return 0;
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44 }