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annotate terminal.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 0433fdd9ba66
children 794ba17f0716
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794
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1 #include <sys/types.h>
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2 #include <sys/stat.h>
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3 #include <unistd.h>
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4 #include <fcntl.h>
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5 #include <stdlib.h>
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6 #include <stdint.h>
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7 #include <signal.h>
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8 #include "util.h"
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9 #include "terminal.h"
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10
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11 pid_t child;
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12
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13 void cleanup_terminal()
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14 {
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15 kill(child, SIGKILL);
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16 unlink(INPUT_PATH);
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17 unlink(OUTPUT_PATH);
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18 }
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19
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20 static char init_done;
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22 void force_no_terminal()
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23 {
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24 init_done = 1;
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25 }
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26
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27 void init_terminal()
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28 {
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29 if (!init_done) {
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30 if (!(isatty(STDIN_FILENO) && isatty(STDOUT_FILENO))) {
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31 #ifndef __APPLE__
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32 //check to see if x-terminal-emulator exists, just use xterm if it doesn't
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33 char *term = system("which x-terminal-emulator > /dev/null") ? "xterm" : "x-terminal-emulator";
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34 #endif
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35 //get rid of FIFO's if they already exist
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36 unlink(INPUT_PATH);
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37 unlink(OUTPUT_PATH);
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38 //create FIFOs for talking to helper process in terminal app
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39 mkfifo(INPUT_PATH, 0666);
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40 mkfifo(OUTPUT_PATH, 0666);
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41
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42 //close existing file descriptors
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43 close(STDIN_FILENO);
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44 close(STDOUT_FILENO);
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45 close(STDERR_FILENO);
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46
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47 child = fork();
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48 if (child == -1) {
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49 //error, oh well
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50 warning("Failed to fork for terminal spawn");
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51 } else if (!child) {
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52 //child process, exec our terminal emulator
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53 #ifdef __APPLE__
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54 execlp("open", "open", "./termhelper", NULL);
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55 #else
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56 execlp(term, term, "-title", "BlastEm Debugger", "-e", "./termhelper", NULL);
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57 #endif
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58 } else {
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59 //connect to the FIFOs, these will block so order is important
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60 open(INPUT_PATH, O_RDONLY);
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61 open(OUTPUT_PATH, O_WRONLY);
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62 atexit(cleanup_terminal);
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63 if (-1 == dup(STDOUT_FILENO)) {
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64 fatal_error("failed to dup STDOUT to STDERR after terminal fork");
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65 }
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66 }
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67 }
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69 init_done = 1;
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70 }
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71 }