Cups stops

[Anonymous]

> Hi,
> sometimes the Printerd�mon stops a printqueue. Is it possible to stop this
> mechanism, so I don't have to restart the Printerqueue?
>
> Regards
> Marc

Here's what I did. I'm in a similar situation that the printer is often turned off to save energy and then I have to log in and start it again.

So I went ahead and modified usb-unix.c as follows:

#define WORKAROUND

[...]

int /* O - Exit status */
print_device(const char *uri, /* I - Device URI */
             const char *hostname, /* I - Hostname/manufacturer */
             const char *resource, /* I - Resource/modelname */
             const char *options, /* I - Device options/serial number */
             int        fp, /* I - File descriptor to print */
             int        copies) /* I - Copies to print */
{
  int fd; /* USB device */
  int wbytes; /* Number of bytes written */
  size_t nbytes, /* Number of bytes read */
                tbytes; /* Total number of bytes written */
  char buffer[8192], /* Output buffer */
                *bufptr; /* Pointer into buffer */
  struct termios opts; /* Parallel port options */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
  struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
#ifdef __linux
  unsigned int status; /* Port status (off-line, out-of-paper, etc.) */
#endif /* __linux */


 /*
  * Open the USB port device...
  */
#ifdef WORKAROUND
  int timer=1; // we will loop for as long as the printer needs to come back online!
#endif // WORKAROUND

  do
  {
    if ((fd = open_device(uri)) == -1)
    {
      if (errno == EBUSY)
      {
        fputs("INFO: USB port busy; will retry in 20 seconds...\n", stderr);
        sleep(20);
      }
#ifdef WORKAROUND
      else /* if (errno == ENXIO || errno == EIO || errno == ENOENT) */
      {
        fputs("INFO: WORKAROUND defined ..waiting for printer to come online!\n",stderr);
        fputs("INFO: Printer not connected; will retry in 10 seconds...\n", stderr);
        sleep(10);
        timer++;
        if(timer >= 20) // after 20 retries, we finally give up
                {
                fprintf(stderr, "ERROR: Unable to open USB device \"%s\": %s\n",
                uri, strerror(errno));
                return(1);
                }
      }
#else
        else if (errno == ENXIO || errno == EIO || errno == ENOENT)
      {
        fputs("INFO: Printer not connected; will retry in 30 seconds...\n", stderr);
        sleep(30);
      }
    else
      {
        fprintf(stderr, "ERROR: Unable to open USB device \"%s\": %s\n",
                uri, strerror(errno));
        return (1);
      }
#endif /* WORKAROUND */