fix term.c

term.c

@@ -8,26 +8,23 @@ int main(int argc, char **argv) {
         printf("usage: %s ROM\n", argv[0]);
         return 1;
     }
-    char *rom = argv[1];
+    char *rom = argv[1]; // find term.rom
-    int fdm = -1;
+    int fdm = -1; // allocate file descriptor
-    setenv("TERM", "ansi", 1);
+
+    // allocate a pty, fork, inititialize file descriptor
     pid_t pid = forkpty(&fdm, NULL, NULL, NULL); 
 
-    if (pid < 0) {
+    if (pid < 0) { // failure
-        // failure
         printf("fork failed");
         return 1;
-    } else if (pid == 0) {
+    } else if (pid == 0) { // child
-        // child
+        setenv("TERM", "ansi", 1);
-        setsid();
+        execlp("bash", "bash", NULL); // exec bash 
-        execlp("bash", "bash");
+    } else { // parent
-    } else {
+        struct winsize ws = {23, 80, 8, 12}; // rows, cols, xps, ypx
-        // parent
+        ioctl(fdm, TIOCSWINSZ, &ws); // set term window size
-        // rows, cols, xpixels, ypixels (little endian)
+        dup2(fdm, 0); // use fdm for stdin
-        char argp[] = {23, 0, 80, 0, 8, 0, 12, 0};
+        dup2(fdm, 1); // use fdm for stdout
-        ioctl(fdm, TIOCSWINSZ, argp);
+        execlp("uxnemu", "uxnemu", rom, NULL); // exec uxnemu
-        dup2(fdm, 0);
-        dup2(fdm, 1);
-        execlp("uxnemu", "uxnemu", rom);
     }
 }