Daniel, What is the OS version you are using when this is happening? Did you try to update the libdevinfo (using cvsup for example) to a newer version? I think that under the original 5.4 it is a bug in devinfo(4) with the described behaviour below.
> > ------------------------------ > > Message: 5 > Date: Sun, 23 Oct 2005 19:57:00 -0700 > From: Daniel Rudy <[EMAIL PROTECTED]> > Subject: devinfo(3) problem... > To: [email protected] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=us-ascii > > > Consider the following code fragment: > > > (segment 2) > Calling code section: > /* get devinfo root nexus */ > printf("root ptr: %p\n", root); > result = usb_devinfo_root(&root); > printf("root ptr: %p\n", root); > if (result < 0) > { > usb_devinfo_close(); > return(-1); > } > > /* internal: get devinfo root nexus */ > int usb_devinfo_root(struct devinfo_dev **root) > { > printf("root: %p\n", *root); > *root = devinfo_handle_to_device(DEVINFO_ROOT_DEVICE); > printf("root: %p\n", *root); <---- second call printf > if (*root == NULL) > { > if (usb_param_use_error == TRUE) error("usb.c: usb_devinfo_root: > root device not found", errno); > if (usb_param_errors_fatal == TRUE) exit(2); > return(-1); > } > return(0); > } > > The problem is that devinfo_handle_to_device always returns a null > pointer here. Why? The next code segment, devinfo_handle_to_device > returns a proper address. > > (segment 1) > /* get devinfo root nexus */ > root = devinfo_handle_to_device(DEVINFO_ROOT_DEVICE); > if (root == NULL) > { > devinfo_free(); > return(-1); > } > > output: > usb_param_devmode: 255 > usb_param_devtype: 255 > usb_param_mode_pref: 0 > ioctl result: -1 > devinfo result: 0 > found_ioctl: 0 > found_devinfo: 1 <---- first call > devinfo device name: umass0 > usb_devinfo_open result: 0 > root ptr: 0x2815769c > root: 0x2815769c > root: 0x0 <---- second call > usb.c: usb_devinfo_root: root device not found: No such file or directory > root ptr: 0x0 > Fatal: Unable to get device information > > > Now I have made sure that I have called devinfo_free() during the first > call before calling devinfo_init() a second time. I tried calling this > code branch on the first time, and it executes properly, so why does it > fail on the second call? > > -- > Daniel Rudy > > > -- victor cruceru ------------------------------------------------ Non est respondendum ad omnia. ( Cicero, Pro Murena Oratio ) ------------------------------------------------ _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
