midi-beeper/beep.diff

--- /home/silasbrown/Downloads/beep(1).c	2021-04-02 09:46:29.695286944 +0100
+++ beep.c	2021-04-02 09:14:11.486246016 +0100
@@ -1,3 +1,5 @@
+/* Modified by ssb22 for NSLU2 / Debian 5 */
+
 /*  beep - just what it sounds like, makes the console beep - but with
  * precision control.  See the man page for details.
  *
@@ -13,7 +15,8 @@
  * warranties of merchantability or fitness for a particular use or ability to 
  * breed pandas in captivity, it just can't be done.
  *
- * Bug me, I like it:  http://johnath.com/  or johnath@johnath.com
+ * Original author's contact:  http://johnath.com/  or johnath@johnath.com
+ * but note that this version was modified for NSLU2 / Debian 5
  */
 
 #include <fcntl.h>
@@ -44,7 +47,11 @@
    result of this is a tone at approximately the desired frequency. :)
 */
 #ifndef CLOCK_TICK_RATE
-#define CLOCK_TICK_RATE 1193180
+//#define CLOCK_TICK_RATE 1193180
+#define CLOCK_TICK_RATE 64000000 // nslu2
+/* (SSB: do the NSLU2 alteration HERE, not
+ * by opening an event device, because that
+ * introduces extra delays in Debian 5) */
 #endif
 
 #define VERSION_STRING "beep-1.2.2"
@@ -110,7 +117,7 @@
 /* print usage and exit */
 void usage_bail(const char *executable_name) {
   printf("Usage:\n%s [-f freq] [-l length] [-r reps] [-d delay] "
-	 "[-D delay] [-s] [-c]\n",
+	 "[-D delay] [-s] [-c] [-e device (ignored)]\n",
 	 executable_name);
   printf("%s [Options...] [-n] [--new] [Options...] ... \n", executable_name);
   printf("%s [-h] [--help]\n", executable_name);
@@ -145,7 +152,7 @@
 			       {"version", 0, NULL, 'V'},
 			       {"new", 0, NULL, 'n'},
 			       {0,0,0,0}};
-  while((c = getopt_long(argc, argv, "f:l:r:d:D:schvVn", opt_list, NULL))
+  while((c = getopt_long(argc, argv, "f:l:r:d:D:schvVne:", opt_list, NULL))
 	!= EOF) {
     int argval = -1;    /* handle parsed numbers for various arguments */
     float argfreq = -1; 
@@ -197,8 +204,10 @@
       exit(0);
       break;
     case 'n' : /* also --new - create another beep */
+      if (result->freq == 0)
+	result->freq = DEFAULT_FREQ;
       result->next = (beep_parms_t *)malloc(sizeof(beep_parms_t));
-      result->next->freq       = DEFAULT_FREQ;
+      result->next->freq       = 0;
       result->next->length     = DEFAULT_LENGTH;
       result->next->reps       = DEFAULT_REPS;
       result->next->delay      = DEFAULT_DELAY;
@@ -207,26 +216,20 @@
       result->next->next       = NULL;
       result = result->next; /* yes, I meant to do that. */
       break;
+    case 'e' : /* also --device */
+      break;
     case 'h' : /* notice that this is also --help */
     default :
       usage_bail(argv[0]);
     }
   }
+  if (result->freq == 0)
+    result->freq = DEFAULT_FREQ;
 }  
 
 void play_beep(beep_parms_t parms) {
   int i; /* loop counter */
 
-  /* try to snag the console */
-  if((console_fd = open("/dev/tty0", O_WRONLY)) == -1) {
-    if((console_fd = open("/dev/vc/0", O_WRONLY)) == -1) {
-      fprintf(stderr, "Could not open /dev/tty0 or /dev/vc/0 for writing.\n");
-      printf("\a");  /* Output the only beep we can, in an effort to fall back on usefulness */
-      perror("open");
-      exit(1);
-    }
-  }
-  
   /* Beep */
   for (i = 0; i < parms.reps; i++) {                    /* start beep */
     if(ioctl(console_fd, KIOCSOUND, (int)(CLOCK_TICK_RATE/parms.freq)) < 0) {
@@ -236,20 +239,16 @@
     /* Look ma, I'm not ansi C compatible! */
     usleep(1000*parms.length);                          /* wait...    */
     ioctl(console_fd, KIOCSOUND, 0);                    /* stop beep  */
-    if(parms.end_delay || (i+1 < parms.reps))
+    if((parms.end_delay || (i+1 < parms.reps)) && /*parms.delay*/ 1)
        usleep(1000*parms.delay);                        /* wait...    */
   }                                                     /* repeat.    */
-
-  close(console_fd);
 }
 
-
-
 int main(int argc, char **argv) {
   char sin[4096], *ptr;
   
   beep_parms_t *parms = (beep_parms_t *)malloc(sizeof(beep_parms_t));
-  parms->freq       = DEFAULT_FREQ;
+  parms->freq       = 0;
   parms->length     = DEFAULT_LENGTH;
   parms->reps       = DEFAULT_REPS;
   parms->delay      = DEFAULT_DELAY;
@@ -260,6 +259,17 @@
   signal(SIGINT, handle_signal);
   parse_command_line(argc, argv, parms);
 
+  
+  /* try to snag the console */
+  /* (SSB: do this at TOP level, NOT on every beep
+   * which may increase the probability of NSLU2 crash) */
+   if((console_fd = open("/dev/tty0", O_WRONLY)) == -1) {
+    fprintf(stderr, "Could not open console device for writing.\n");
+    printf("\a");  /* Output the only beep we can, in an effort to fall back on usefulness */
+    perror("open");
+    exit(1);
+  }
+
   /* this outermost while loop handles the possibility that -n/--new has been
      used, i.e. that we have multiple beeps specified. Each iteration will
      play, then free() one parms instance. */
@@ -297,5 +307,6 @@
     parms = next;
   }
 
+  close(console_fd);
   return EXIT_SUCCESS;
 }