[PATCH] Re: ports/76434: sysutils/lcdproc coredumps when started with the HD44780 driver

[Markus Dolze]

The following reply was made to PR ports/76434; it has been noted by GNATS.

From: Markus Dolze <bsdfan at nurfuerspam.de>
To: freebsd-gnats-submit at FreeBSD.org, purple at fajita.org
Cc:  
Subject: [PATCH] Re: ports/76434: sysutils/lcdproc coredumps when started
 with the HD44780 driver
Date: Mon, 28 Mar 2005 21:38:56 +0200

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 Attached is the necessary patch for 0.4.5. I tested it on my hd44780 
 display. Please review.
 
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 --- server/drivers/port.h.orig	Mon Mar 28 20:50:31 2005
 +++ server/drivers/port.h	Mon Mar 28 20:50:50 2005
 @@ -145,6 +145,8 @@
  #include <machine/cpufunc.h>
  #include <machine/sysarch.h>
          
 +static FILE * port_access_handle = NULL ;
 +        
  // Read a byte from port
  static inline int port_in (unsigned short int port) {
          return inb(port);
 @@ -157,12 +159,22 @@
          
  // Get access to a specific port
  static inline int port_access (unsigned short int port) {
 -        return i386_set_ioperm(port, 1, 1);
 +	if( port_access_handle
 +	    || (port_access_handle = fopen("/dev/io", "rw")) != NULL ) {
 +        	return i386_set_ioperm(port, 1, 1);
 +	} else {
 +		return( -1 );  /*  Failure */
 +	}
  }
  
  // Get access 3 to ports: port (CONTROL), port+1 (STATUS) and port+2 (DATA)
  static inline int port_access_full (unsigned short int port) {
 -        return i386_set_ioperm(port, 3, 1);
 +	if( port_access_handle
 +	    || (port_access_handle = fopen("/dev/io", "rw")) != NULL ) {
 +        	return i386_set_ioperm(port, 3, 1);
 +	} else {
 +		return( -1 );  /*  Failure */
 +	}
  }
  
  //#endif // defined HAVE_I386_IOPERM_FREEBSD && defined HAVE_MACHINE_SYSARCH_H
 
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