Nits here and there. Made log device buffer messages again.

drivers/log/Makefile

@@ -23,7 +23,7 @@ LIBDRIVER = $d/libdriver/driver.o
 all build:	$(DRIVER)
 $(DRIVER):	$(OBJ) $(LIBDRIVER)
 	$(CC) -o $@ $(LDFLAGS) $(OBJ) $(LIBDRIVER) $(LIBS)
-	install -S 64w $(DRIVER)
+	install -S 4kb $(DRIVER)
 
 $(LIBDRIVER): 
 	cd $d/libdriver && $(MAKE) 

drivers/log/diag.c

@@ -48,14 +48,14 @@ message *m;					/* notification message */
       i=0;
       while (bytes > 0) {			
           print_buf[i] = kmess.km_buf[(r%KMESS_BUF_SIZE)];
-          log_putc( kmess.km_buf[(r%KMESS_BUF_SIZE)] );
           bytes --;
           r ++;
           i ++;
       }
       /* Now terminate the new message and print it. */
       print_buf[i] = 0;
-      printf(print_buf);
+      printf("%s", print_buf);
+      log_append(print_buf, i);
   }
 
   /* Almost done, store 'next' so that we can determine what part of the
@@ -82,7 +82,7 @@ PUBLIC int do_diagnostics(message *m)
   int count;
   char c;
   int i = 0;
-  static char diagbuf[1024];
+  static char diagbuf[10240];
 
   /* Forward the message to the TTY driver. Inform the TTY driver about the
    * original sender, so that it knows where the buffer to be printed is.
@@ -97,26 +97,14 @@ PUBLIC int do_diagnostics(message *m)
    */
   src = (vir_bytes) m->DIAG_PRINT_BUF;
   count = m->DIAG_BUF_COUNT; 
-  while (count > 0) {
+  while (count > 0 && i < sizeof(diagbuf)-1) {
       if (sys_datacopy(proc_nr, src, SELF, (vir_bytes) &c, 1) != OK) 
           break;		/* stop copying on error */
-      log_putc(c);		/* accumulate character */
       src ++;
       count --;
+      diagbuf[i++] = c;
   }
+  log_append(diagbuf, i);
 
   return result;
 }
-
-
-/*===========================================================================*
- *				log_putc				     *
- *===========================================================================*/
-PUBLIC void log_putc(c)
-int c;					/* char to be added to diag buffer */
-{
-
-}
-
-
-

drivers/log/log.c

@@ -112,8 +112,13 @@ subwrite(struct logdevice *log, int count, int proc_nr, vir_bytes user_vir)
 		count = LOG_SIZE - log->log_write;
 	buf = log->log_buffer + log->log_write;
 
-	if((r=sys_vircopy(proc_nr,D,user_vir, SELF,D,(int)buf, count)) != OK)
-		return r;
+	if(proc_nr == SELF) {
+		memcpy(buf, (char *) user_vir, count);
+	}
+	else {
+		if((r=sys_vircopy(proc_nr,D,user_vir, SELF,D,(int)buf, count)) != OK)
+			return r;
+	}
 
 	LOGINC(log->log_write, count);
 	log->log_size += count;
@@ -160,6 +165,25 @@ subwrite(struct logdevice *log, int count, int proc_nr, vir_bytes user_vir)
         return count;
 }
 
+/*===========================================================================*
+ *				log_append				*
+ *===========================================================================*/
+PUBLIC void
+log_append(char *buf, int count)
+{
+	int w = 0, skip = 0;
+
+	if(count < 1) return;
+	if(count > LOG_SIZE) skip = count - LOG_SIZE;
+	count -= skip;
+	buf += skip;
+	w = subwrite(&logdevices[0], count, SELF, (vir_bytes) buf);
+
+	if(w > 0 && w < count)
+		subwrite(&logdevices[0], count-w, SELF, (vir_bytes) buf+w);
+	return;
+}
+
 /*===========================================================================*
  *				subread					     *
  *===========================================================================*/
@@ -224,9 +248,6 @@ unsigned nr_req;		/* length of request vector */
 	    		/* There's already someone hanging to read, or
 	    		 * no real I/O requested.
 	    		 */
-#if LOG_DEBUG
-	    		printf("someone (%d) is already blocking\n", log->log_proc_nr);
-#endif
 	    		return(OK);
 	    	}
 
@@ -345,7 +366,7 @@ message *m_ptr;
 }
 
 /*============================================================================*
- *				log_select				      *
+ *				log_other				      *
  *============================================================================*/
 PRIVATE int log_other(dp, m_ptr)
 struct driver *dp;

drivers/log/log.h

@@ -31,6 +31,5 @@ struct logdevice {
 _PROTOTYPE( void kputc, (int c)						);
 _PROTOTYPE( int do_new_kmess, (message *m)				);
 _PROTOTYPE( int do_diagnostics, (message *m)				);
-_PROTOTYPE( void log_putc, (int c)					);
-
+_PROTOTYPE( void log_append, (char *buf, int len)				);